Reorganise a little to let the PV inverter be defined outside

the Reconstruct class.

This lets the multiple choices for PV inversion be composed without
changing the routine and no if/else case enumeration.

Implemented SchurDiagMooee PV inversion (red black) and Unprec PV inversion.
Red black cuts from 190 iterations to 90 iterations at 10^-12 on 8^4 test system

Will revisit multiple Schur options and add a Fourier based multishift PV inverse, similar
to the one Rudy Arthur did in BFM

.gitignore

@@ -114,4 +114,3 @@ gh-pages/
 #####################
 Grid/qcd/spin/gamma-gen/*.h
 Grid/qcd/spin/gamma-gen/*.cc
-Grid/util/Version.h

ChangeLog

@@ -1,5 +0,0 @@
-Version : 0.8.0
-
-- Clang 3.5 and above, ICPC v16 and above, GCC 6.3 and above recommended
-- MPI and MPI3 comms optimisations for KNL and OPA finished
-- Half precision comms

Grid/DisableWarnings.h

@@ -30,34 +30,8 @@ directory
 #ifndef DISABLE_WARNINGS_H
 #define DISABLE_WARNINGS_H
 
-
-
-#if defined __GNUC__ && __GNUC__>=6
-#pragma GCC diagnostic ignored "-Wignored-attributes"
-#endif
-
  //disables and intel compiler specific warning (in json.hpp)
 #pragma warning disable 488  
 
-#ifdef __NVCC__
- //disables nvcc specific warning in json.hpp
-#pragma clang diagnostic ignored "-Wdeprecated-register"
-#pragma diag_suppress unsigned_compare_with_zero
-#pragma diag_suppress cast_to_qualified_type
-
- //disables nvcc specific warning in many files
-#pragma diag_suppress esa_on_defaulted_function_ignored
-#pragma diag_suppress extra_semicolon
-
-//Eigen only
-#endif
-
-// Disable vectorisation in Eigen on the Power8/9 and PowerPC
-#ifdef  __ALTIVEC__
-#define  EIGEN_DONT_VECTORIZE
-#endif
-#ifdef  __VSX__
-#define  EIGEN_DONT_VECTORIZE
-#endif
 
 #endif

Grid/Grid.h

@@ -42,7 +42,6 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
 #include <Grid/GridQCDcore.h>
 #include <Grid/qcd/action/Action.h>
 #include <Grid/qcd/utils/GaugeFix.h>
-#include <Grid/qcd/utils/CovariantSmearing.h>
 #include <Grid/qcd/smearing/Smearing.h>
 #include <Grid/parallelIO/MetaData.h>
 #include <Grid/qcd/hmc/HMC_aggregate.h>

Grid/GridCore.h

@@ -38,19 +38,16 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
 #ifndef GRID_BASE_H
 #define GRID_BASE_H
 
-
-#include <Grid/DisableWarnings.h>
-#include <Grid/Namespace.h>
 #include <Grid/GridStd.h>
-#include <Grid/threads/Pragmas.h>
+
 #include <Grid/perfmon/Timer.h>
 #include <Grid/perfmon/PerfCount.h>
-#include <Grid/util/Util.h>
 #include <Grid/log/Log.h>
 #include <Grid/allocator/AlignedAllocator.h>
 #include <Grid/simd/Simd.h>
-#include <Grid/threads/Threads.h>
 #include <Grid/serialisation/Serialisation.h>
+#include <Grid/threads/Threads.h>
+#include <Grid/util/Util.h>
 #include <Grid/util/Sha.h>
 #include <Grid/communicator/Communicator.h> 
 #include <Grid/cartesian/Cartesian.h>    
@@ -60,6 +57,5 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
 #include <Grid/stencil/Stencil.h>      
 #include <Grid/parallelIO/BinaryIO.h>
 #include <Grid/algorithms/Algorithms.h>   
-NAMESPACE_CHECK(GridCore)
 
 #endif

Grid/GridQCDcore.h

@@ -38,6 +38,5 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
 #include <Grid/qcd/spin/Spin.h>
 #include <Grid/qcd/utils/Utils.h>
 #include <Grid/qcd/representations/Representations.h>
-NAMESPACE_CHECK(GridQCDCore);
 
 #endif

Grid/GridStd.h

@@ -7,7 +7,6 @@
 #include <cassert>
 #include <complex>
 #include <vector>
-#include <array>
 #include <string>
 #include <iostream>
 #include <iomanip>

Grid/Grid_Eigen_Dense.h

@@ -1,58 +1,14 @@
-#include <Grid/GridCore.h>
 #pragma once
 // Force Eigen to use MKL if Grid has been configured with --enable-mkl
 #ifdef USE_MKL
 #define EIGEN_USE_MKL_ALL
 #endif
 
-
 #if defined __GNUC__
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 #endif
-
-/* NVCC save and restore compile environment*/
-#ifdef __NVCC__
-#pragma push
-#pragma diag_suppress code_is_unreachable
-#pragma push_macro("__CUDA_ARCH__")
-#pragma push_macro("__NVCC__")
-#pragma push_macro("__CUDACC__")
-#undef __NVCC__
-#undef __CUDACC__
-#undef __CUDA_ARCH__
-#define __NVCC__REDEFINE__
-#endif 
-
-/* SYCL save and restore compile environment*/
-#ifdef __SYCL_DEVICE_ONLY__  
-#pragma push
-#pragma push_macro("__SYCL_DEVICE_ONLY__")
-#undef __SYCL_DEVICE_ONLY__
-#undef EIGEN_USE_SYCL
-#define EIGEN_DONT_VECTORIZE
-#endif
-
-
 #include <Grid/Eigen/Dense>
-#include <Grid/Eigen/unsupported/CXX11/Tensor>
-
-/* NVCC restore */
-#ifdef __NVCC__REDEFINE__
-#pragma pop_macro("__CUDACC__")
-#pragma pop_macro("__NVCC__")
-#pragma pop_macro("__CUDA_ARCH__")
-#pragma pop
-#endif
-
-/*SYCL restore*/
-#ifdef __SYCL__REDEFINE__
-#pragma pop_macro("__SYCL_DEVICE_ONLY__")
-#pragma pop
-#endif
-
 #if defined __GNUC__
 #pragma GCC diagnostic pop
 #endif
-
-

Grid/Grid_Eigen_Tensor.h

@@ -1 +0,0 @@
-#include <Grid/Grid_Eigen_Dense.h>

Grid/algorithms/Algorithms.h

@@ -35,34 +35,28 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 
 #include <Grid/algorithms/approx/Zolotarev.h>
 #include <Grid/algorithms/approx/Chebyshev.h>
-#include <Grid/algorithms/approx/JacobiPolynomial.h>
 #include <Grid/algorithms/approx/Remez.h>
 #include <Grid/algorithms/approx/MultiShiftFunction.h>
 #include <Grid/algorithms/approx/Forecast.h>
-#include <Grid/algorithms/approx/RemezGeneral.h>
-#include <Grid/algorithms/approx/ZMobius.h>
 
 #include <Grid/algorithms/iterative/Deflation.h>
 #include <Grid/algorithms/iterative/ConjugateGradient.h>
-#include <Grid/algorithms/iterative/BiCGSTAB.h>
 #include <Grid/algorithms/iterative/ConjugateResidual.h>
 #include <Grid/algorithms/iterative/NormalEquations.h>
 #include <Grid/algorithms/iterative/SchurRedBlack.h>
 #include <Grid/algorithms/iterative/ConjugateGradientMultiShift.h>
 #include <Grid/algorithms/iterative/ConjugateGradientMixedPrec.h>
-#include <Grid/algorithms/iterative/BiCGSTABMixedPrec.h>
 #include <Grid/algorithms/iterative/BlockConjugateGradient.h>
 #include <Grid/algorithms/iterative/ConjugateGradientReliableUpdate.h>
-#include <Grid/algorithms/iterative/MinimalResidual.h>
-#include <Grid/algorithms/iterative/GeneralisedMinimalResidual.h>
-#include <Grid/algorithms/iterative/CommunicationAvoidingGeneralisedMinimalResidual.h>
-#include <Grid/algorithms/iterative/FlexibleGeneralisedMinimalResidual.h>
-#include <Grid/algorithms/iterative/FlexibleCommunicationAvoidingGeneralisedMinimalResidual.h>
-#include <Grid/algorithms/iterative/MixedPrecisionFlexibleGeneralisedMinimalResidual.h>
 #include <Grid/algorithms/iterative/ImplicitlyRestartedLanczos.h>
-#include <Grid/algorithms/iterative/PowerMethod.h>
-
 #include <Grid/algorithms/CoarsenedMatrix.h>
 #include <Grid/algorithms/FFT.h>
 
+
+// EigCg
+// Pcg
+// Hdcg
+// GCR
+// etc..
+
 #endif

Grid/algorithms/FFT.h

@@ -1,5 +1,5 @@
 
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,8 +24,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef _GRID_FFT_H_
 #define _GRID_FFT_H_
 
@@ -38,64 +38,64 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 #endif
 
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-template<class scalar> struct FFTW { };
+  template<class scalar> struct FFTW { };
 
 #ifdef HAVE_FFTW	
-template<> struct FFTW<ComplexD> {
-public:
+  template<> struct FFTW<ComplexD> {
+  public:
 
-  typedef fftw_complex FFTW_scalar;
-  typedef fftw_plan    FFTW_plan;
+    typedef fftw_complex FFTW_scalar;
+    typedef fftw_plan    FFTW_plan;
 
-  static FFTW_plan fftw_plan_many_dft(int rank, const int *n,int howmany,
-				      FFTW_scalar *in, const int *inembed,		
-				      int istride, int idist,		
-				      FFTW_scalar *out, const int *onembed,		
-				      int ostride, int odist,		
-				      int sign, unsigned flags) {
-    return ::fftw_plan_many_dft(rank,n,howmany,in,inembed,istride,idist,out,onembed,ostride,odist,sign,flags);
-  }	  
+    static FFTW_plan fftw_plan_many_dft(int rank, const int *n,int howmany,
+					FFTW_scalar *in, const int *inembed,		
+					int istride, int idist,		
+					FFTW_scalar *out, const int *onembed,		
+					int ostride, int odist,		
+					int sign, unsigned flags) {
+      return ::fftw_plan_many_dft(rank,n,howmany,in,inembed,istride,idist,out,onembed,ostride,odist,sign,flags);
+    }	  
     
-  static void fftw_flops(const FFTW_plan p,double *add, double *mul, double *fmas){
-    ::fftw_flops(p,add,mul,fmas);
-  }
+    static void fftw_flops(const FFTW_plan p,double *add, double *mul, double *fmas){
+      ::fftw_flops(p,add,mul,fmas);
+    }
 
-  inline static void fftw_execute_dft(const FFTW_plan p,FFTW_scalar *in,FFTW_scalar *out) {
-    ::fftw_execute_dft(p,in,out);
-  }
-  inline static void fftw_destroy_plan(const FFTW_plan p) {
-    ::fftw_destroy_plan(p);
-  }
-};
+    inline static void fftw_execute_dft(const FFTW_plan p,FFTW_scalar *in,FFTW_scalar *out) {
+      ::fftw_execute_dft(p,in,out);
+    }
+    inline static void fftw_destroy_plan(const FFTW_plan p) {
+      ::fftw_destroy_plan(p);
+    }
+  };
 
-template<> struct FFTW<ComplexF> {
-public:
+  template<> struct FFTW<ComplexF> {
+  public:
 
-  typedef fftwf_complex FFTW_scalar;
-  typedef fftwf_plan    FFTW_plan;
+    typedef fftwf_complex FFTW_scalar;
+    typedef fftwf_plan    FFTW_plan;
 
-  static FFTW_plan fftw_plan_many_dft(int rank, const int *n,int howmany,
-				      FFTW_scalar *in, const int *inembed,		
-				      int istride, int idist,		
-				      FFTW_scalar *out, const int *onembed,		
-				      int ostride, int odist,		
-				      int sign, unsigned flags) {
-    return ::fftwf_plan_many_dft(rank,n,howmany,in,inembed,istride,idist,out,onembed,ostride,odist,sign,flags);
-  }	  
+    static FFTW_plan fftw_plan_many_dft(int rank, const int *n,int howmany,
+					FFTW_scalar *in, const int *inembed,		
+					int istride, int idist,		
+					FFTW_scalar *out, const int *onembed,		
+					int ostride, int odist,		
+					int sign, unsigned flags) {
+      return ::fftwf_plan_many_dft(rank,n,howmany,in,inembed,istride,idist,out,onembed,ostride,odist,sign,flags);
+    }	  
     
-  static void fftw_flops(const FFTW_plan p,double *add, double *mul, double *fmas){
-    ::fftwf_flops(p,add,mul,fmas);
-  }
+    static void fftw_flops(const FFTW_plan p,double *add, double *mul, double *fmas){
+      ::fftwf_flops(p,add,mul,fmas);
+    }
 
-  inline static void fftw_execute_dft(const FFTW_plan p,FFTW_scalar *in,FFTW_scalar *out) {
-    ::fftwf_execute_dft(p,in,out);
-  }
-  inline static void fftw_destroy_plan(const FFTW_plan p) {
-    ::fftwf_destroy_plan(p);
-  }
-};
+    inline static void fftw_execute_dft(const FFTW_plan p,FFTW_scalar *in,FFTW_scalar *out) {
+      ::fftwf_execute_dft(p,in,out);
+    }
+    inline static void fftw_destroy_plan(const FFTW_plan p) {
+      ::fftwf_destroy_plan(p);
+    }
+  };
 
 #endif
 
@@ -104,188 +104,203 @@ public:
 #define FFTW_BACKWARD (+1)
 #endif
 
-class FFT {
-private:
+  class FFT {
+  private:
     
-  GridCartesian *vgrid;
-  GridCartesian *sgrid;
+    GridCartesian *vgrid;
+    GridCartesian *sgrid;
     
-  int Nd;
-  double flops;
-  double flops_call;
-  uint64_t usec;
+    int Nd;
+    double flops;
+    double flops_call;
+    uint64_t usec;
     
-  Coordinate dimensions;
-  Coordinate processors;
-  Coordinate processor_coor;
+    std::vector<int> dimensions;
+    std::vector<int> processors;
+    std::vector<int> processor_coor;
     
-public:
+  public:
     
-  static const int forward=FFTW_FORWARD;
-  static const int backward=FFTW_BACKWARD;
+    static const int forward=FFTW_FORWARD;
+    static const int backward=FFTW_BACKWARD;
     
-  double Flops(void) {return flops;}
-  double MFlops(void) {return flops/usec;}
-  double USec(void)   {return (double)usec;}    
+    double Flops(void) {return flops;}
+    double MFlops(void) {return flops/usec;}
+    double USec(void)   {return (double)usec;}    
 
-  FFT ( GridCartesian * grid ) :
+    FFT ( GridCartesian * grid ) :
     vgrid(grid),
     Nd(grid->_ndimension),
     dimensions(grid->_fdimensions),
     processors(grid->_processors),
     processor_coor(grid->_processor_coor)
-  {
-    flops=0;
-    usec =0;
-    Coordinate layout(Nd,1);
-    sgrid = new GridCartesian(dimensions,layout,processors);
-  };
-    
-  ~FFT ( void)  {
-    delete sgrid;
-  }
-    
-  template<class vobj>
-  void FFT_dim_mask(Lattice<vobj> &result,const Lattice<vobj> &source,Coordinate mask,int sign){
-
-    conformable(result.Grid(),vgrid);
-    conformable(source.Grid(),vgrid);
-    Lattice<vobj> tmp(vgrid);
-    tmp = source;
-    for(int d=0;d<Nd;d++){
-      if( mask[d] ) {
-	FFT_dim(result,tmp,d,sign);
-	tmp=result;
-      }
-    }
-  }
-
-  template<class vobj>
-  void FFT_all_dim(Lattice<vobj> &result,const Lattice<vobj> &source,int sign){
-    Coordinate mask(Nd,1);
-    FFT_dim_mask(result,source,mask,sign);
-  }
-
-
-  template<class vobj>
-  void FFT_dim(Lattice<vobj> &result,const Lattice<vobj> &source,int dim, int sign){
-#ifndef HAVE_FFTW
-    assert(0);
-#else
-    conformable(result.Grid(),vgrid);
-    conformable(source.Grid(),vgrid);
-
-    int L = vgrid->_ldimensions[dim];
-    int G = vgrid->_fdimensions[dim];
-      
-    Coordinate layout(Nd,1);
-    Coordinate pencil_gd(vgrid->_fdimensions);
-      
-    pencil_gd[dim] = G*processors[dim];
-      
-    // Pencil global vol LxLxGxLxL per node
-    GridCartesian pencil_g(pencil_gd,layout,processors);
-      
-    // Construct pencils
-    typedef typename vobj::scalar_object sobj;
-    typedef typename sobj::scalar_type   scalar;
-      
-    Lattice<sobj> pgbuf(&pencil_g);
-    auto pgbuf_v = pgbuf.View();
-
-    typedef typename FFTW<scalar>::FFTW_scalar FFTW_scalar;
-    typedef typename FFTW<scalar>::FFTW_plan   FFTW_plan;
-      
-    int Ncomp = sizeof(sobj)/sizeof(scalar);
-    int Nlow  = 1;
-    for(int d=0;d<dim;d++){
-      Nlow*=vgrid->_ldimensions[d];
-    }
-      
-    int rank = 1;  /* 1d transforms */
-    int n[] = {G}; /* 1d transforms of length G */
-    int howmany = Ncomp;
-    int odist,idist,istride,ostride;
-    idist   = odist   = 1;          /* Distance between consecutive FT's */
-    istride = ostride = Ncomp*Nlow; /* distance between two elements in the same FT */
-    int *inembed = n, *onembed = n;
-      
-    scalar div;
-    if ( sign == backward ) div = 1.0/G;
-    else if ( sign == forward ) div = 1.0;
-    else assert(0);
-      
-    FFTW_plan p;
     {
-      FFTW_scalar *in = (FFTW_scalar *)&pgbuf_v[0];
-      FFTW_scalar *out= (FFTW_scalar *)&pgbuf_v[0];
-      p = FFTW<scalar>::fftw_plan_many_dft(rank,n,howmany,
-					   in,inembed,
-					   istride,idist,
-					   out,onembed,
-					   ostride, odist,
-					   sign,FFTW_ESTIMATE);
+      flops=0;
+      usec =0;
+      std::vector<int> layout(Nd,1);
+      sgrid = new GridCartesian(dimensions,layout,processors);
+    };
+    
+    ~FFT ( void)  {
+      delete sgrid;
     }
-      
-    // Barrel shift and collect global pencil
-    Coordinate lcoor(Nd), gcoor(Nd);
-    result = source;
-    int pc = processor_coor[dim];
-    for(int p=0;p<processors[dim];p++) {
-      thread_for(idx, sgrid->lSites(),{
-          Coordinate cbuf(Nd);
-          sobj s;
-	  sgrid->LocalIndexToLocalCoor(idx,cbuf);
-	  peekLocalSite(s,result,cbuf);
-	  cbuf[dim]+=((pc+p) % processors[dim])*L;
-	  //            cbuf[dim]+=p*L;
-	  pokeLocalSite(s,pgbuf,cbuf);
-      });
-      if (p != processors[dim] - 1) {
-	result = Cshift(result,dim,L);
+    
+    template<class vobj>
+    void FFT_dim_mask(Lattice<vobj> &result,const Lattice<vobj> &source,std::vector<int> mask,int sign){
+
+      conformable(result._grid,vgrid);
+      conformable(source._grid,vgrid);
+      Lattice<vobj> tmp(vgrid);
+      tmp = source;
+      for(int d=0;d<Nd;d++){
+	if( mask[d] ) {
+	  FFT_dim(result,tmp,d,sign);
+	  tmp=result;
+	}
       }
     }
-      
-    // Loop over orthog coords
-    int NN=pencil_g.lSites();
-    GridStopWatch timer;
-    timer.Start();
-    thread_for( idx,NN,{
-        Coordinate cbuf(Nd);
-	pencil_g.LocalIndexToLocalCoor(idx, cbuf);
-	if ( cbuf[dim] == 0 ) {  // restricts loop to plane at lcoor[dim]==0
-	  FFTW_scalar *in = (FFTW_scalar *)&pgbuf_v[idx];
-	  FFTW_scalar *out= (FFTW_scalar *)&pgbuf_v[idx];
-	  FFTW<scalar>::fftw_execute_dft(p,in,out);
-	}
-    });
-    timer.Stop();
-      
-    // performance counting
-    double add,mul,fma;
-    FFTW<scalar>::fftw_flops(p,&add,&mul,&fma);
-    flops_call = add+mul+2.0*fma;
-    usec += timer.useconds();
-    flops+= flops_call*NN;
-      
-    // writing out result
-    thread_for(idx,sgrid->lSites(),{
-	Coordinate clbuf(Nd), cgbuf(Nd);
-	sobj s;
-	sgrid->LocalIndexToLocalCoor(idx,clbuf);
-	cgbuf = clbuf;
-	cgbuf[dim] = clbuf[dim]+L*pc;
-	peekLocalSite(s,pgbuf,cgbuf);
-	pokeLocalSite(s,result,clbuf);
-    });
-    result = result*div;
-      
-    // destroying plan
-    FFTW<scalar>::fftw_destroy_plan(p);
-#endif
-  }
-};
 
-NAMESPACE_END(Grid);
+    template<class vobj>
+    void FFT_all_dim(Lattice<vobj> &result,const Lattice<vobj> &source,int sign){
+      std::vector<int> mask(Nd,1);
+      FFT_dim_mask(result,source,mask,sign);
+    }
+
+
+    template<class vobj>
+    void FFT_dim(Lattice<vobj> &result,const Lattice<vobj> &source,int dim, int sign){
+#ifndef HAVE_FFTW
+      assert(0);
+#else
+      conformable(result._grid,vgrid);
+      conformable(source._grid,vgrid);
+
+      int L = vgrid->_ldimensions[dim];
+      int G = vgrid->_fdimensions[dim];
+      
+      std::vector<int> layout(Nd,1);
+      std::vector<int> pencil_gd(vgrid->_fdimensions);
+      
+      pencil_gd[dim] = G*processors[dim];
+      
+      // Pencil global vol LxLxGxLxL per node
+      GridCartesian pencil_g(pencil_gd,layout,processors);
+      
+      // Construct pencils
+      typedef typename vobj::scalar_object sobj;
+      typedef typename sobj::scalar_type   scalar;
+      
+      Lattice<sobj> pgbuf(&pencil_g);
+      
+
+      typedef typename FFTW<scalar>::FFTW_scalar FFTW_scalar;
+      typedef typename FFTW<scalar>::FFTW_plan   FFTW_plan;
+      
+      int Ncomp = sizeof(sobj)/sizeof(scalar);
+      int Nlow  = 1;
+      for(int d=0;d<dim;d++){
+        Nlow*=vgrid->_ldimensions[d];
+      }
+      
+      int rank = 1;  /* 1d transforms */
+      int n[] = {G}; /* 1d transforms of length G */
+      int howmany = Ncomp;
+      int odist,idist,istride,ostride;
+      idist   = odist   = 1;          /* Distance between consecutive FT's */
+      istride = ostride = Ncomp*Nlow; /* distance between two elements in the same FT */
+      int *inembed = n, *onembed = n;
+      
+      scalar div;
+	  if ( sign == backward ) div = 1.0/G;
+	  else if ( sign == forward ) div = 1.0;
+	  else assert(0);
+      
+      FFTW_plan p;
+      {
+        FFTW_scalar *in = (FFTW_scalar *)&pgbuf._odata[0];
+        FFTW_scalar *out= (FFTW_scalar *)&pgbuf._odata[0];
+        p = FFTW<scalar>::fftw_plan_many_dft(rank,n,howmany,
+                                             in,inembed,
+                                             istride,idist,
+                                             out,onembed,
+                                             ostride, odist,
+                                             sign,FFTW_ESTIMATE);
+      }
+      
+      // Barrel shift and collect global pencil
+      std::vector<int> lcoor(Nd), gcoor(Nd);
+      result = source;
+      int pc = processor_coor[dim];
+      for(int p=0;p<processors[dim];p++) {
+        PARALLEL_REGION
+        {
+          std::vector<int> cbuf(Nd);
+          sobj s;
+          
+          PARALLEL_FOR_LOOP_INTERN
+          for(int idx=0;idx<sgrid->lSites();idx++) {
+            sgrid->LocalIndexToLocalCoor(idx,cbuf);
+            peekLocalSite(s,result,cbuf);
+	    cbuf[dim]+=((pc+p) % processors[dim])*L;
+	    //            cbuf[dim]+=p*L;
+            pokeLocalSite(s,pgbuf,cbuf);
+          }
+        }
+        if (p != processors[dim] - 1)
+        {
+          result = Cshift(result,dim,L);
+        }
+      }
+      
+      // Loop over orthog coords
+      int NN=pencil_g.lSites();
+      GridStopWatch timer;
+      timer.Start();
+      PARALLEL_REGION
+      {
+        std::vector<int> cbuf(Nd);
+        
+        PARALLEL_FOR_LOOP_INTERN
+        for(int idx=0;idx<NN;idx++) {
+          pencil_g.LocalIndexToLocalCoor(idx, cbuf);
+          if ( cbuf[dim] == 0 ) {  // restricts loop to plane at lcoor[dim]==0
+            FFTW_scalar *in = (FFTW_scalar *)&pgbuf._odata[idx];
+            FFTW_scalar *out= (FFTW_scalar *)&pgbuf._odata[idx];
+            FFTW<scalar>::fftw_execute_dft(p,in,out);
+          }
+        }
+      }
+      timer.Stop();
+      
+      // performance counting
+      double add,mul,fma;
+      FFTW<scalar>::fftw_flops(p,&add,&mul,&fma);
+      flops_call = add+mul+2.0*fma;
+      usec += timer.useconds();
+      flops+= flops_call*NN;
+      
+      // writing out result
+      PARALLEL_REGION
+      {
+        std::vector<int> clbuf(Nd), cgbuf(Nd);
+        sobj s;
+        
+        PARALLEL_FOR_LOOP_INTERN
+        for(int idx=0;idx<sgrid->lSites();idx++) {
+          sgrid->LocalIndexToLocalCoor(idx,clbuf);
+          cgbuf = clbuf;
+          cgbuf[dim] = clbuf[dim]+L*pc;
+          peekLocalSite(s,pgbuf,cgbuf);
+          pokeLocalSite(s,result,clbuf);
+        }
+      }
+      result = result*div;
+      
+      // destroying plan
+      FFTW<scalar>::fftw_destroy_plan(p);
+#endif
+    }
+  };
+}
 
 #endif

Grid/algorithms/Preconditioner.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,24 +23,24 @@ Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_PRECONDITIONER_H
 #define GRID_PRECONDITIONER_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-template<class Field> class Preconditioner :  public LinearFunction<Field> { 
-  virtual void operator()(const Field &src, Field & psi)=0;
-};
+  template<class Field> class Preconditioner :  public LinearFunction<Field> { 
+    virtual void operator()(const Field &src, Field & psi)=0;
+  };
 
-template<class Field> class TrivialPrecon :  public Preconditioner<Field> { 
-public:
-  void operator()(const Field &src, Field & psi){
-    psi = src;
-  }
-  TrivialPrecon(void){};
-};
+  template<class Field> class TrivialPrecon :  public Preconditioner<Field> { 
+  public:
+    void operator()(const Field &src, Field & psi){
+      psi = src;
+    }
+    TrivialPrecon(void){};
+  };
 
-NAMESPACE_END(Grid);
+}
 #endif

Grid/algorithms/SparseMatrix.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,58 +23,49 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef  GRID_ALGORITHM_SPARSE_MATRIX_H
 #define  GRID_ALGORITHM_SPARSE_MATRIX_H
 
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-/////////////////////////////////////////////////////////////////////////////////////////////
-// Interface defining what I expect of a general sparse matrix, such as a Fermion action
-/////////////////////////////////////////////////////////////////////////////////////////////
-template<class Field> class SparseMatrixBase {
-public:
-  virtual GridBase *Grid(void) =0;
-  // Full checkerboar operations
-  virtual void  M    (const Field &in, Field &out)=0;
-  virtual void  Mdag (const Field &in, Field &out)=0;
-  virtual void  MdagM(const Field &in, Field &out) {
-    Field tmp (in.Grid());
-    M(in,tmp);
-    Mdag(tmp,out);
-  }
-  virtual  void Mdiag    (const Field &in, Field &out)=0;
-  virtual  void Mdir     (const Field &in, Field &out,int dir, int disp)=0;
-  virtual  void MdirAll  (const Field &in, std::vector<Field> &out)=0;
-};
+  /////////////////////////////////////////////////////////////////////////////////////////////
+  // Interface defining what I expect of a general sparse matrix, such as a Fermion action
+  /////////////////////////////////////////////////////////////////////////////////////////////
+    template<class Field> class SparseMatrixBase {
+    public:
+      virtual GridBase *Grid(void) =0;
+      // Full checkerboar operations
+      virtual RealD M    (const Field &in, Field &out)=0;
+      virtual RealD Mdag (const Field &in, Field &out)=0;
+      virtual void  MdagM(const Field &in, Field &out,RealD &ni,RealD &no) {
+	Field tmp (in._grid);
+	ni=M(in,tmp);
+	no=Mdag(tmp,out);
+      }
+      virtual  void Mdiag    (const Field &in, Field &out)=0;
+      virtual  void Mdir     (const Field &in, Field &out,int dir, int disp)=0;
+    };
 
-/////////////////////////////////////////////////////////////////////////////////////////////
-// Interface augmented by a red black sparse matrix, such as a Fermion action
-/////////////////////////////////////////////////////////////////////////////////////////////
-template<class Field> class CheckerBoardedSparseMatrixBase : public SparseMatrixBase<Field> {
-public:
-  virtual GridBase *RedBlackGrid(void)=0;
+  /////////////////////////////////////////////////////////////////////////////////////////////
+  // Interface augmented by a red black sparse matrix, such as a Fermion action
+  /////////////////////////////////////////////////////////////////////////////////////////////
+    template<class Field> class CheckerBoardedSparseMatrixBase : public SparseMatrixBase<Field> {
+    public:
+      virtual GridBase *RedBlackGrid(void)=0;
+      // half checkerboard operaions
+      virtual  void Meooe    (const Field &in, Field &out)=0;
+      virtual  void Mooee    (const Field &in, Field &out)=0;
+      virtual  void MooeeInv (const Field &in, Field &out)=0;
 
-  //////////////////////////////////////////////////////////////////////
-  // Query the even even properties to make algorithmic decisions
-  //////////////////////////////////////////////////////////////////////
-  virtual RealD  Mass(void)        { return 0.0; };
-  virtual int    ConstEE(void)     { return 1; }; // Disable assumptions unless overridden
-  virtual int    isTrivialEE(void) { return 0; }; // by a derived class that knows better
+      virtual  void MeooeDag    (const Field &in, Field &out)=0;
+      virtual  void MooeeDag    (const Field &in, Field &out)=0;
+      virtual  void MooeeInvDag (const Field &in, Field &out)=0;
 
-  // half checkerboard operaions
-  virtual  void Meooe    (const Field &in, Field &out)=0;
-  virtual  void Mooee    (const Field &in, Field &out)=0;
-  virtual  void MooeeInv (const Field &in, Field &out)=0;
+    };
 
-  virtual  void MeooeDag    (const Field &in, Field &out)=0;
-  virtual  void MooeeDag    (const Field &in, Field &out)=0;
-  virtual  void MooeeInvDag (const Field &in, Field &out)=0;
-
-};
-
-NAMESPACE_END(Grid);
+}
 
 #endif

Grid/algorithms/approx/Chebyshev.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -25,14 +25,14 @@ Author: Christoph Lehner <clehner@bnl.gov>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_CHEBYSHEV_H
 #define GRID_CHEBYSHEV_H
 
 #include <Grid/algorithms/LinearOperator.h>
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 struct ChebyParams : Serializable {
   GRID_SERIALIZABLE_CLASS_MEMBERS(ChebyParams,
@@ -41,369 +41,337 @@ struct ChebyParams : Serializable {
 				  int, Npoly);
 };
 
-////////////////////////////////////////////////////////////////////////////////////////////
-// Generic Chebyshev approximations
-////////////////////////////////////////////////////////////////////////////////////////////
-template<class Field>
-class Chebyshev : public OperatorFunction<Field> {
-private:
-  using OperatorFunction<Field>::operator();
+  ////////////////////////////////////////////////////////////////////////////////////////////
+  // Generic Chebyshev approximations
+  ////////////////////////////////////////////////////////////////////////////////////////////
+  template<class Field>
+  class Chebyshev : public OperatorFunction<Field> {
+  private:
+    std::vector<RealD> Coeffs;
+    int order;
+    RealD hi;
+    RealD lo;
 
-  std::vector<RealD> Coeffs;
-  int order;
-  RealD hi;
-  RealD lo;
-
-public:
-  void csv(std::ostream &out){
-    RealD diff = hi-lo;
-    RealD delta = diff*1.0e-9;
-    for (RealD x=lo; x<hi; x+=delta) {
-      delta*=1.1;
-      RealD f = approx(x);
-      out<< x<<" "<<f<<std::endl;
-    }
-    return;
-  }
-
-  // Convenience for plotting the approximation
-  void   PlotApprox(std::ostream &out) {
-    out<<"Polynomial approx ["<<lo<<","<<hi<<"]"<<std::endl;
-    for(RealD x=lo;x<hi;x+=(hi-lo)/50.0){
-      out <<x<<"\t"<<approx(x)<<std::endl;
-    }
-  };
-
-  Chebyshev(){};
-  Chebyshev(ChebyParams p){ Init(p.alpha,p.beta,p.Npoly);};
-  Chebyshev(RealD _lo,RealD _hi,int _order, RealD (* func)(RealD) ) {Init(_lo,_hi,_order,func);};
-  Chebyshev(RealD _lo,RealD _hi,int _order) {Init(_lo,_hi,_order);};
-
-  ////////////////////////////////////////////////////////////////////////////////////////////////////
-  // c.f. numerical recipes "chebft"/"chebev". This is sec 5.8 "Chebyshev approximation".
-  ////////////////////////////////////////////////////////////////////////////////////////////////////
-  // CJ: the one we need for Lanczos
-  void Init(RealD _lo,RealD _hi,int _order)
-  {
-    lo=_lo;
-    hi=_hi;
-    order=_order;
-      
-    if(order < 2) exit(-1);
-    Coeffs.resize(order);
-    Coeffs.assign(0.,order);
-    Coeffs[order-1] = 1.;
-  };
-  
-  // PB - more efficient low pass drops high modes above the low as 1/x uses all Chebyshev's.
-  // Similar kick effect below the threshold as Lanczos filter approach
-  void InitLowPass(RealD _lo,RealD _hi,int _order)
-  {
-    lo=_lo;
-    hi=_hi;
-    order=_order;
-      
-    if(order < 2) exit(-1);
-    Coeffs.resize(order);
-    for(int j=0;j<order;j++){
-      RealD k=(order-1.0);
-      RealD s=std::cos( j*M_PI*(k+0.5)/order );
-      Coeffs[j] = s * 2.0/order;
-    }
-    
-  };
-
-  void Init(RealD _lo,RealD _hi,int _order, RealD (* func)(RealD))
-  {
-    lo=_lo;
-    hi=_hi;
-    order=_order;
-      
-    if(order < 2) exit(-1);
-    Coeffs.resize(order);
-    for(int j=0;j<order;j++){
-      RealD s=0;
-      for(int k=0;k<order;k++){
-	RealD y=std::cos(M_PI*(k+0.5)/order);
-	RealD x=0.5*(y*(hi-lo)+(hi+lo));
-	RealD f=func(x);
-	s=s+f*std::cos( j*M_PI*(k+0.5)/order );
+  public:
+    void csv(std::ostream &out){
+      RealD diff = hi-lo;
+      RealD delta = (hi-lo)*1.0e-9;
+      for (RealD x=lo; x<hi; x+=delta) {
+	delta*=1.1;
+	RealD f = approx(x);
+	out<< x<<" "<<f<<std::endl;
       }
-      Coeffs[j] = s * 2.0/order;
+      return;
     }
-  };
+
+    // Convenience for plotting the approximation
+    void   PlotApprox(std::ostream &out) {
+      out<<"Polynomial approx ["<<lo<<","<<hi<<"]"<<std::endl;
+      for(RealD x=lo;x<hi;x+=(hi-lo)/50.0){
+	out <<x<<"\t"<<approx(x)<<std::endl;
+      }
+    };
+
+    Chebyshev(){};
+    Chebyshev(ChebyParams p){ Init(p.alpha,p.beta,p.Npoly);};
+    Chebyshev(RealD _lo,RealD _hi,int _order, RealD (* func)(RealD) ) {Init(_lo,_hi,_order,func);};
+    Chebyshev(RealD _lo,RealD _hi,int _order) {Init(_lo,_hi,_order);};
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+    // c.f. numerical recipes "chebft"/"chebev". This is sec 5.8 "Chebyshev approximation".
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+// CJ: the one we need for Lanczos
+    void Init(RealD _lo,RealD _hi,int _order)
+    {
+      lo=_lo;
+      hi=_hi;
+      order=_order;
+      
+      if(order < 2) exit(-1);
+      Coeffs.resize(order);
+      Coeffs.assign(0.,order);
+      Coeffs[order-1] = 1.;
+    };
+
+    void Init(RealD _lo,RealD _hi,int _order, RealD (* func)(RealD))
+    {
+      lo=_lo;
+      hi=_hi;
+      order=_order;
+      
+      if(order < 2) exit(-1);
+      Coeffs.resize(order);
+      for(int j=0;j<order;j++){
+	RealD s=0;
+	for(int k=0;k<order;k++){
+	  RealD y=std::cos(M_PI*(k+0.5)/order);
+	  RealD x=0.5*(y*(hi-lo)+(hi+lo));
+	  RealD f=func(x);
+	  s=s+f*std::cos( j*M_PI*(k+0.5)/order );
+	}
+	Coeffs[j] = s * 2.0/order;
+      }
+    };
 
     
-  void JacksonSmooth(void){
-    RealD M=order;
-    RealD alpha = M_PI/(M+2);
-    RealD lmax = std::cos(alpha);
-    RealD sumUsq =0;
-    std::vector<RealD> U(M);
-    std::vector<RealD> a(M);
-    std::vector<RealD> g(M);
-    for(int n=0;n<=M;n++){
-      U[n] = std::sin((n+1)*std::acos(lmax))/std::sin(std::acos(lmax));
-      sumUsq += U[n]*U[n];
-    }      
-    sumUsq = std::sqrt(sumUsq);
+    void JacksonSmooth(void){
+      RealD M=order;
+      RealD alpha = M_PI/(M+2);
+      RealD lmax = std::cos(alpha);
+      RealD sumUsq =0;
+      std::vector<RealD> U(M);
+      std::vector<RealD> a(M);
+      std::vector<RealD> g(M);
+      for(int n=0;n<=M;n++){
+	U[n] = std::sin((n+1)*std::acos(lmax))/std::sin(std::acos(lmax));
+	sumUsq += U[n]*U[n];
+      }      
+      sumUsq = std::sqrt(sumUsq);
 
-    for(int i=1;i<=M;i++){
-      a[i] = U[i]/sumUsq;
-    }
-    g[0] = 1.0;
-    for(int m=1;m<=M;m++){
-      g[m] = 0;
-      for(int i=0;i<=M-m;i++){
-	g[m]+= a[i]*a[m+i];
+      for(int i=1;i<=M;i++){
+	a[i] = U[i]/sumUsq;
+      }
+      g[0] = 1.0;
+      for(int m=1;m<=M;m++){
+	g[m] = 0;
+	for(int i=0;i<=M-m;i++){
+	  g[m]+= a[i]*a[m+i];
+	}
+      }
+      for(int m=1;m<=M;m++){
+	Coeffs[m]*=g[m];
       }
     }
-    for(int m=1;m<=M;m++){
-      Coeffs[m]*=g[m];
-    }
-  }
-  RealD approx(RealD x) // Convenience for plotting the approximation
-  {
-    RealD Tn;
-    RealD Tnm;
-    RealD Tnp;
+    RealD approx(RealD x) // Convenience for plotting the approximation
+    {
+      RealD Tn;
+      RealD Tnm;
+      RealD Tnp;
       
-    RealD y=( x-0.5*(hi+lo))/(0.5*(hi-lo));
+      RealD y=( x-0.5*(hi+lo))/(0.5*(hi-lo));
       
-    RealD T0=1;
-    RealD T1=y;
+      RealD T0=1;
+      RealD T1=y;
       
-    RealD sum;
-    sum = 0.5*Coeffs[0]*T0;
-    sum+= Coeffs[1]*T1;
+      RealD sum;
+      sum = 0.5*Coeffs[0]*T0;
+      sum+= Coeffs[1]*T1;
       
-    Tn =T1;
-    Tnm=T0;
-    for(int i=2;i<order;i++){
-      Tnp=2*y*Tn-Tnm;
-      Tnm=Tn;
-      Tn =Tnp;
-      sum+= Tn*Coeffs[i];
-    }
-    return sum;
-  };
+      Tn =T1;
+      Tnm=T0;
+      for(int i=2;i<order;i++){
+	Tnp=2*y*Tn-Tnm;
+	Tnm=Tn;
+	Tn =Tnp;
+	sum+= Tn*Coeffs[i];
+      }
+      return sum;
+    };
 
-  RealD approxD(RealD x)
-  {
-    RealD Un;
-    RealD Unm;
-    RealD Unp;
+    RealD approxD(RealD x)
+    {
+      RealD Un;
+      RealD Unm;
+      RealD Unp;
       
-    RealD y=( x-0.5*(hi+lo))/(0.5*(hi-lo));
+      RealD y=( x-0.5*(hi+lo))/(0.5*(hi-lo));
       
-    RealD U0=1;
-    RealD U1=2*y;
+      RealD U0=1;
+      RealD U1=2*y;
       
-    RealD sum;
-    sum = Coeffs[1]*U0;
-    sum+= Coeffs[2]*U1*2.0;
+      RealD sum;
+      sum = Coeffs[1]*U0;
+      sum+= Coeffs[2]*U1*2.0;
       
-    Un =U1;
-    Unm=U0;
-    for(int i=2;i<order-1;i++){
-      Unp=2*y*Un-Unm;
-      Unm=Un;
-      Un =Unp;
-      sum+= Un*Coeffs[i+1]*(i+1.0);
-    }
-    return sum/(0.5*(hi-lo));
-  };
+      Un =U1;
+      Unm=U0;
+      for(int i=2;i<order-1;i++){
+	Unp=2*y*Un-Unm;
+	Unm=Un;
+	Un =Unp;
+	sum+= Un*Coeffs[i+1]*(i+1.0);
+      }
+      return sum/(0.5*(hi-lo));
+    };
     
-  RealD approxInv(RealD z, RealD x0, int maxiter, RealD resid) {
-    RealD x = x0;
-    RealD eps;
+    RealD approxInv(RealD z, RealD x0, int maxiter, RealD resid) {
+      RealD x = x0;
+      RealD eps;
       
-    int i;
-    for (i=0;i<maxiter;i++) {
-      eps = approx(x) - z;
-      if (fabs(eps / z) < resid)
-	return x;
-      x = x - eps / approxD(x);
+      int i;
+      for (i=0;i<maxiter;i++) {
+	eps = approx(x) - z;
+	if (fabs(eps / z) < resid)
+	  return x;
+	x = x - eps / approxD(x);
+      }
+      
+      return std::numeric_limits<double>::quiet_NaN();
     }
-      
-    return std::numeric_limits<double>::quiet_NaN();
-  }
     
-  // Implement the required interface
-  void operator() (LinearOperatorBase<Field> &Linop, const Field &in, Field &out) {
+    // Implement the required interface
+    void operator() (LinearOperatorBase<Field> &Linop, const Field &in, Field &out) {
 
-    GridBase *grid=in.Grid();
+      GridBase *grid=in._grid;
 
-    int vol=grid->gSites();
-    typedef typename Field::vector_type vector_type;
+      // std::cout << "Chevyshef(): in._grid="<<in._grid<<std::endl;
+      //std::cout <<" Linop.Grid()="<<Linop.Grid()<<"Linop.RedBlackGrid()="<<Linop.RedBlackGrid()<<std::endl;
 
-    Field T0(grid); T0 = in;  
-    Field T1(grid); 
-    Field T2(grid);
-    Field y(grid);
+      int vol=grid->gSites();
+
+      Field T0(grid); T0 = in;  
+      Field T1(grid); 
+      Field T2(grid);
+      Field y(grid);
       
-    Field *Tnm = &T0;
-    Field *Tn  = &T1;
-    Field *Tnp = &T2;
+      Field *Tnm = &T0;
+      Field *Tn  = &T1;
+      Field *Tnp = &T2;
 
-    // Tn=T1 = (xscale M + mscale)in
-    RealD xscale = 2.0/(hi-lo);
-    RealD mscale = -(hi+lo)/(hi-lo);
-    Linop.HermOp(T0,y);
-    axpby(T1,xscale,mscale,y,in);
+      // Tn=T1 = (xscale M + mscale)in
+      RealD xscale = 2.0/(hi-lo);
+      RealD mscale = -(hi+lo)/(hi-lo);
+      Linop.HermOp(T0,y);
+      T1=y*xscale+in*mscale;
 
-    // sum = .5 c[0] T0 + c[1] T1
-    //    out = ()*T0 + Coeffs[1]*T1;
-    axpby(out,0.5*Coeffs[0],Coeffs[1],T0,T1);
-    for(int n=2;n<order;n++){
-
-      Linop.HermOp(*Tn,y);
-#if 0
-      auto y_v = y.View();
-      auto Tn_v = Tn->View();
-      auto Tnp_v = Tnp->View();
-      auto Tnm_v = Tnm->View();
-      constexpr int Nsimd = vector_type::Nsimd();
-      accelerator_forNB(ss, in.Grid()->oSites(), Nsimd, {
-	  coalescedWrite(y_v[ss],xscale*y_v(ss)+mscale*Tn_v(ss));
-	  coalescedWrite(Tnp_v[ss],2.0*y_v(ss)-Tnm_v(ss));
-      });
-      if ( Coeffs[n] != 0.0) {
-	axpy(out,Coeffs[n],*Tnp,out);
-      }
-#else
-      axpby(y,xscale,mscale,y,(*Tn));
-      axpby(*Tnp,2.0,-1.0,y,(*Tnm));
-      if ( Coeffs[n] != 0.0) {
-	axpy(out,Coeffs[n],*Tnp,out);
-      }
-#endif
-      // Cycle pointers to avoid copies
-      Field *swizzle = Tnm;
-      Tnm    =Tn;
-      Tn     =Tnp;
-      Tnp    =swizzle;
-	  
-    }
-  }
-};
-
-
-template<class Field>
-class ChebyshevLanczos : public Chebyshev<Field> {
-private:
-  std::vector<RealD> Coeffs;
-  int order;
-  RealD alpha;
-  RealD beta;
-  RealD mu;
-
-public:
-  ChebyshevLanczos(RealD _alpha,RealD _beta,RealD _mu,int _order) :
-    alpha(_alpha),
-    beta(_beta),
-    mu(_mu)
-  {
-    order=_order;
-    Coeffs.resize(order);
-    for(int i=0;i<_order;i++){
-      Coeffs[i] = 0.0;
-    }
-    Coeffs[order-1]=1.0;
-  };
-
-  void csv(std::ostream &out){
-    for (RealD x=-1.2*alpha; x<1.2*alpha; x+=(2.0*alpha)/10000) {
-      RealD f = approx(x);
-      out<< x<<" "<<f<<std::endl;
-    }
-    return;
-  }
-
-  RealD approx(RealD xx) // Convenience for plotting the approximation
-  {
-    RealD Tn;
-    RealD Tnm;
-    RealD Tnp;
-    Real aa = alpha * alpha;
-    Real bb = beta  *  beta;
-      
-    RealD x = ( 2.0 * (xx-mu)*(xx-mu) - (aa+bb) ) / (aa-bb);
-
-    RealD y= x;
-      
-    RealD T0=1;
-    RealD T1=y;
-      
-    RealD sum;
-    sum = 0.5*Coeffs[0]*T0;
-    sum+= Coeffs[1]*T1;
-      
-    Tn =T1;
-    Tnm=T0;
-    for(int i=2;i<order;i++){
-      Tnp=2*y*Tn-Tnm;
-      Tnm=Tn;
-      Tn =Tnp;
-      sum+= Tn*Coeffs[i];
-    }
-    return sum;
-  };
-
-  // shift_Multiply in Rudy's code
-  void AminusMuSq(LinearOperatorBase<Field> &Linop, const Field &in, Field &out) 
-  {
-    GridBase *grid=in.Grid();
-    Field tmp(grid);
-
-    RealD aa= alpha*alpha;
-    RealD bb= beta * beta;
-
-    Linop.HermOp(in,out);
-    out = out - mu*in;
-
-    Linop.HermOp(out,tmp);
-    tmp = tmp - mu * out;
-
-    out = (2.0/ (aa-bb) ) * tmp -  ((aa+bb)/(aa-bb))*in;
-  };
-  // Implement the required interface
-  void operator() (LinearOperatorBase<Field> &Linop, const Field &in, Field &out) {
-
-    GridBase *grid=in.Grid();
-
-    int vol=grid->gSites();
-
-    Field T0(grid); T0 = in;  
-    Field T1(grid); 
-    Field T2(grid);
-    Field  y(grid);
-      
-    Field *Tnm = &T0;
-    Field *Tn  = &T1;
-    Field *Tnp = &T2;
-
-    // Tn=T1 = (xscale M )*in
-    AminusMuSq(Linop,T0,T1);
-
-    // sum = .5 c[0] T0 + c[1] T1
-    out = (0.5*Coeffs[0])*T0 + Coeffs[1]*T1;
-    for(int n=2;n<order;n++){
+      // sum = .5 c[0] T0 + c[1] T1
+      out = (0.5*Coeffs[0])*T0 + Coeffs[1]*T1;
+      for(int n=2;n<order;n++){
 	
-      AminusMuSq(Linop,*Tn,y);
+	Linop.HermOp(*Tn,y);
 
-      *Tnp=2.0*y-(*Tnm);
+	y=xscale*y+mscale*(*Tn);
 
-      out=out+Coeffs[n]* (*Tnp);
+	*Tnp=2.0*y-(*Tnm);
 
-      // Cycle pointers to avoid copies
-      Field *swizzle = Tnm;
-      Tnm    =Tn;
-      Tn     =Tnp;
-      Tnp    =swizzle;
+	out=out+Coeffs[n]* (*Tnp);
+
+	// Cycle pointers to avoid copies
+	Field *swizzle = Tnm;
+	Tnm    =Tn;
+	Tn     =Tnp;
+	Tnp    =swizzle;
 	  
+      }
     }
-  }
-};
-NAMESPACE_END(Grid);
+  };
+
+
+  template<class Field>
+  class ChebyshevLanczos : public Chebyshev<Field> {
+  private:
+    std::vector<RealD> Coeffs;
+    int order;
+    RealD alpha;
+    RealD beta;
+    RealD mu;
+
+  public:
+    ChebyshevLanczos(RealD _alpha,RealD _beta,RealD _mu,int _order) :
+    alpha(_alpha),
+      beta(_beta),
+          mu(_mu)
+    {
+      order=_order;
+      Coeffs.resize(order);
+      for(int i=0;i<_order;i++){
+	Coeffs[i] = 0.0;
+      }
+      Coeffs[order-1]=1.0;
+    };
+
+    void csv(std::ostream &out){
+      for (RealD x=-1.2*alpha; x<1.2*alpha; x+=(2.0*alpha)/10000) {
+	RealD f = approx(x);
+	out<< x<<" "<<f<<std::endl;
+      }
+      return;
+    }
+
+    RealD approx(RealD xx) // Convenience for plotting the approximation
+    {
+      RealD Tn;
+      RealD Tnm;
+      RealD Tnp;
+      Real aa = alpha * alpha;
+      Real bb = beta  *  beta;
+      
+      RealD x = ( 2.0 * (xx-mu)*(xx-mu) - (aa+bb) ) / (aa-bb);
+
+      RealD y= x;
+      
+      RealD T0=1;
+      RealD T1=y;
+      
+      RealD sum;
+      sum = 0.5*Coeffs[0]*T0;
+      sum+= Coeffs[1]*T1;
+      
+      Tn =T1;
+      Tnm=T0;
+      for(int i=2;i<order;i++){
+	Tnp=2*y*Tn-Tnm;
+	Tnm=Tn;
+	Tn =Tnp;
+	sum+= Tn*Coeffs[i];
+      }
+      return sum;
+    };
+
+    // shift_Multiply in Rudy's code
+    void AminusMuSq(LinearOperatorBase<Field> &Linop, const Field &in, Field &out) 
+    {
+      GridBase *grid=in._grid;
+      Field tmp(grid);
+
+      RealD aa= alpha*alpha;
+      RealD bb= beta * beta;
+
+      Linop.HermOp(in,out);
+      out = out - mu*in;
+
+      Linop.HermOp(out,tmp);
+      tmp = tmp - mu * out;
+
+      out = (2.0/ (aa-bb) ) * tmp -  ((aa+bb)/(aa-bb))*in;
+    };
+    // Implement the required interface
+    void operator() (LinearOperatorBase<Field> &Linop, const Field &in, Field &out) {
+
+      GridBase *grid=in._grid;
+
+      int vol=grid->gSites();
+
+      Field T0(grid); T0 = in;  
+      Field T1(grid); 
+      Field T2(grid);
+      Field  y(grid);
+      
+      Field *Tnm = &T0;
+      Field *Tn  = &T1;
+      Field *Tnp = &T2;
+
+      // Tn=T1 = (xscale M )*in
+      AminusMuSq(Linop,T0,T1);
+
+      // sum = .5 c[0] T0 + c[1] T1
+      out = (0.5*Coeffs[0])*T0 + Coeffs[1]*T1;
+      for(int n=2;n<order;n++){
+	
+	AminusMuSq(Linop,*Tn,y);
+
+	*Tnp=2.0*y-(*Tnm);
+
+	out=out+Coeffs[n]* (*Tnp);
+
+	// Cycle pointers to avoid copies
+	Field *swizzle = Tnm;
+	Tnm    =Tn;
+	Tn     =Tnp;
+	Tnp    =swizzle;
+	  
+      }
+    }
+  };
+}
 #endif

Grid/algorithms/approx/Forecast.h

@@ -26,127 +26,127 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 See the full license in the file "LICENSE" in the top level distribution directory
 *************************************************************************************/
-			   /*  END LEGAL */
+/*  END LEGAL */
 
 #ifndef INCLUDED_FORECAST_H
 #define INCLUDED_FORECAST_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-// Abstract base class.
-// Takes a matrix (Mat), a source (phi), and a vector of Fields (chi)
-// and returns a forecasted solution to the system D*psi = phi (psi).
-template<class Matrix, class Field>
-class Forecast
-{
-public:
-  virtual Field operator()(Matrix &Mat, const Field& phi, const std::vector<Field>& chi) = 0;
-};
-
-// Implementation of Brower et al.'s chronological inverter (arXiv:hep-lat/9509012),
-// used to forecast solutions across poles of the EOFA heatbath.
-//
-// Modified from CPS (cps_pp/src/util/dirac_op/d_op_base/comsrc/minresext.C)
-template<class Matrix, class Field>
-class ChronoForecast : public Forecast<Matrix,Field>
-{
-public:
-  Field operator()(Matrix &Mat, const Field& phi, const std::vector<Field>& prev_solns)
+  // Abstract base class.
+  // Takes a matrix (Mat), a source (phi), and a vector of Fields (chi)
+  // and returns a forecasted solution to the system D*psi = phi (psi).
+  template<class Matrix, class Field>
+  class Forecast
   {
-    int degree = prev_solns.size();
-    Field chi(phi); // forecasted solution
-
-    // Trivial cases
-    if(degree == 0){ chi = Zero(); return chi; }
-    else if(degree == 1){ return prev_solns[0]; }
-
-    //    RealD dot;
-    ComplexD xp;
-    Field r(phi); // residual
-    Field Mv(phi);
-    std::vector<Field> v(prev_solns); // orthonormalized previous solutions
-    std::vector<Field> MdagMv(degree,phi);
-
-    // Array to hold the matrix elements
-    std::vector<std::vector<ComplexD>> G(degree, std::vector<ComplexD>(degree));
-
-    // Solution and source vectors
-    std::vector<ComplexD> a(degree);
-    std::vector<ComplexD> b(degree);
-
-    // Orthonormalize the vector basis
-    for(int i=0; i<degree; i++){
-      v[i] *= 1.0/std::sqrt(norm2(v[i]));
-      for(int j=i+1; j<degree; j++){ v[j] -= innerProduct(v[i],v[j]) * v[i]; }
-    }
-
-    // Perform sparse matrix multiplication and construct rhs
-    for(int i=0; i<degree; i++){
-      b[i] = innerProduct(v[i],phi);
-      Mat.M(v[i],Mv);
-      Mat.Mdag(Mv,MdagMv[i]);
-      G[i][i] = innerProduct(v[i],MdagMv[i]);
-    }
-
-    // Construct the matrix
-    for(int j=0; j<degree; j++){
-      for(int k=j+1; k<degree; k++){
-	G[j][k] = innerProduct(v[j],MdagMv[k]);
-	G[k][j] = conjugate(G[j][k]);
-      }}
-
-    // Gauss-Jordan elimination with partial pivoting
-    for(int i=0; i<degree; i++){
-
-      // Perform partial pivoting
-      int k = i;
-      for(int j=i+1; j<degree; j++){ if(abs(G[j][j]) > abs(G[k][k])){ k = j; } }
-      if(k != i){
-	xp = b[k];
-	b[k] = b[i];
-	b[i] = xp;
-	for(int j=0; j<degree; j++){
-	  xp = G[k][j];
-	  G[k][j] = G[i][j];
-	  G[i][j] = xp;
-	}
-      }
-
-      // Convert matrix to upper triangular form
-      for(int j=i+1; j<degree; j++){
-	xp = G[j][i]/G[i][i];
-	b[j] -= xp * b[i];
-	for(int k=0; k<degree; k++){ G[j][k] -= xp*G[i][k]; }
-      }
-    }
-
-    // Use Gaussian elimination to solve equations and calculate initial guess
-    chi = Zero();
-    r = phi;
-    for(int i=degree-1; i>=0; i--){
-      a[i] = 0.0;
-      for(int j=i+1; j<degree; j++){ a[i] += G[i][j] * a[j]; }
-      a[i] = (b[i]-a[i])/G[i][i];
-      chi += a[i]*v[i];
-      r -= a[i]*MdagMv[i];
-    }
-
-    RealD true_r(0.0);
-    ComplexD tmp;
-    for(int i=0; i<degree; i++){
-      tmp = -b[i];
-      for(int j=0; j<degree; j++){ tmp += G[i][j]*a[j]; }
-      tmp = conjugate(tmp)*tmp;
-      true_r += std::sqrt(tmp.real());
-    }
-
-    RealD error = std::sqrt(norm2(r)/norm2(phi));
-    std::cout << GridLogMessage << "ChronoForecast: |res|/|src| = " << error << std::endl;
-
-    return chi;
+    public:
+      virtual Field operator()(Matrix &Mat, const Field& phi, const std::vector<Field>& chi) = 0;
   };
-};
 
-NAMESPACE_END(Grid);
+  // Implementation of Brower et al.'s chronological inverter (arXiv:hep-lat/9509012),
+  // used to forecast solutions across poles of the EOFA heatbath.
+  //
+  // Modified from CPS (cps_pp/src/util/dirac_op/d_op_base/comsrc/minresext.C)
+  template<class Matrix, class Field>
+  class ChronoForecast : public Forecast<Matrix,Field>
+  {
+    public:
+      Field operator()(Matrix &Mat, const Field& phi, const std::vector<Field>& prev_solns)
+      {
+        int degree = prev_solns.size();
+        Field chi(phi); // forecasted solution
+
+        // Trivial cases
+        if(degree == 0){ chi = zero; return chi; }
+        else if(degree == 1){ return prev_solns[0]; }
+
+        RealD dot;
+        ComplexD xp;
+        Field r(phi); // residual
+        Field Mv(phi);
+        std::vector<Field> v(prev_solns); // orthonormalized previous solutions
+        std::vector<Field> MdagMv(degree,phi);
+
+        // Array to hold the matrix elements
+        std::vector<std::vector<ComplexD>> G(degree, std::vector<ComplexD>(degree));
+
+        // Solution and source vectors
+        std::vector<ComplexD> a(degree);
+        std::vector<ComplexD> b(degree);
+
+        // Orthonormalize the vector basis
+        for(int i=0; i<degree; i++){
+          v[i] *= 1.0/std::sqrt(norm2(v[i]));
+          for(int j=i+1; j<degree; j++){ v[j] -= innerProduct(v[i],v[j]) * v[i]; }
+        }
+
+        // Perform sparse matrix multiplication and construct rhs
+        for(int i=0; i<degree; i++){
+          b[i] = innerProduct(v[i],phi);
+          Mat.M(v[i],Mv);
+          Mat.Mdag(Mv,MdagMv[i]);
+          G[i][i] = innerProduct(v[i],MdagMv[i]);
+        }
+
+        // Construct the matrix
+        for(int j=0; j<degree; j++){
+        for(int k=j+1; k<degree; k++){
+          G[j][k] = innerProduct(v[j],MdagMv[k]);
+          G[k][j] = std::conj(G[j][k]);
+        }}
+
+        // Gauss-Jordan elimination with partial pivoting
+        for(int i=0; i<degree; i++){
+
+          // Perform partial pivoting
+          int k = i;
+          for(int j=i+1; j<degree; j++){ if(std::abs(G[j][j]) > std::abs(G[k][k])){ k = j; } }
+          if(k != i){
+            xp = b[k];
+            b[k] = b[i];
+            b[i] = xp;
+            for(int j=0; j<degree; j++){
+              xp = G[k][j];
+              G[k][j] = G[i][j];
+              G[i][j] = xp;
+            }
+          }
+
+          // Convert matrix to upper triangular form
+          for(int j=i+1; j<degree; j++){
+            xp = G[j][i]/G[i][i];
+            b[j] -= xp * b[i];
+            for(int k=0; k<degree; k++){ G[j][k] -= xp*G[i][k]; }
+          }
+        }
+
+        // Use Gaussian elimination to solve equations and calculate initial guess
+        chi = zero;
+        r = phi;
+        for(int i=degree-1; i>=0; i--){
+          a[i] = 0.0;
+          for(int j=i+1; j<degree; j++){ a[i] += G[i][j] * a[j]; }
+          a[i] = (b[i]-a[i])/G[i][i];
+          chi += a[i]*v[i];
+          r -= a[i]*MdagMv[i];
+        }
+
+        RealD true_r(0.0);
+        ComplexD tmp;
+        for(int i=0; i<degree; i++){
+          tmp = -b[i];
+          for(int j=0; j<degree; j++){ tmp += G[i][j]*a[j]; }
+          tmp = std::conj(tmp)*tmp;
+          true_r += std::sqrt(tmp.real());
+        }
+
+        RealD error = std::sqrt(norm2(r)/norm2(phi));
+        std::cout << GridLogMessage << "ChronoForecast: |res|/|src| = " << error << std::endl;
+
+        return chi;
+      };
+  };
+
+}
 
 #endif

Grid/algorithms/approx/JacobiPolynomial.h

@@ -1,129 +0,0 @@
-#ifndef GRID_JACOBIPOLYNOMIAL_H
-#define GRID_JACOBIPOLYNOMIAL_H
-
-#include <Grid/algorithms/LinearOperator.h>
-
-NAMESPACE_BEGIN(Grid);
-
-template<class Field>
-class JacobiPolynomial : public OperatorFunction<Field> {
- private:
-  using OperatorFunction<Field>::operator();
-
-  int order;
-  RealD hi;
-  RealD lo;
-  RealD alpha;
-  RealD beta;
-
- public:
-  void csv(std::ostream &out){
-    csv(out,lo,hi);
-  }
-  void csv(std::ostream &out,RealD llo,RealD hhi){
-    RealD diff = hhi-llo;
-    RealD delta = diff*1.0e-5;
-    for (RealD x=llo-delta; x<=hhi; x+=delta) {
-      RealD f = approx(x);
-      out<< x<<" "<<f <<std::endl;
-    }
-    return;
-  }
-
-  JacobiPolynomial(){};
-  JacobiPolynomial(RealD _lo,RealD _hi,int _order,RealD _alpha, RealD _beta)
-  {
-      lo=_lo;
-      hi=_hi;
-      alpha=_alpha;
-      beta=_beta;
-      order=_order;
-  };
-
-  RealD approx(RealD x) // Convenience for plotting the approximation                                                       
-  {
-    RealD Tn;
-    RealD Tnm;
-    RealD Tnp;
-
-    RealD y=( x-0.5*(hi+lo))/(0.5*(hi-lo));
-
-    RealD T0=1.0;
-    RealD T1=(alpha-beta)*0.5+(alpha+beta+2.0)*0.5*y;
-
-    Tn =T1;
-    Tnm=T0;
-    for(int n=2;n<=order;n++){
-      RealD cnp = 2.0*n*(n+alpha+beta)*(2.0*n-2.0+alpha+beta);
-      RealD cny = (2.0*n-2.0+alpha+beta)*(2.0*n-1.0+alpha+beta)*(2.0*n+alpha+beta);
-      RealD cn1 = (2.0*n+alpha+beta-1.0)*(alpha*alpha-beta*beta);
-      RealD cnm = - 2.0*(n+alpha-1.0)*(n+beta-1.0)*(2.0*n+alpha+beta);
-      Tnp= ( cny * y *Tn + cn1 * Tn + cnm * Tnm )/ cnp;
-      Tnm=Tn;
-      Tn =Tnp;
-    }
-    return Tnp;
-  };
-
-  // Implement the required interface                                                                                       
-  void operator() (LinearOperatorBase<Field> &Linop, const Field &in, Field &out) {
-    GridBase *grid=in.Grid();
-
-    int vol=grid->gSites();
-
-    Field T0(grid);
-    Field T1(grid);
-    Field T2(grid);
-    Field y(grid);
-
-
-    Field *Tnm = &T0;
-    Field *Tn  = &T1;
-    Field *Tnp = &T2;
-
-    //    RealD T0=1.0;                                                                                                     
-    T0=in;
-
-    //    RealD y=( x-0.5*(hi+lo))/(0.5*(hi-lo));                                                                           
-    //           = x * 2/(hi-lo) - (hi+lo)/(hi-lo)                                                                          
-    Linop.HermOp(T0,y);
-    RealD xscale = 2.0/(hi-lo);
-    RealD mscale = -(hi+lo)/(hi-lo);
-    Linop.HermOp(T0,y);
-    y=y*xscale+in*mscale;
-
-    // RealD T1=(alpha-beta)*0.5+(alpha+beta+2.0)*0.5*y;
-    RealD halfAmB  = (alpha-beta)*0.5;
-    RealD halfApBp2= (alpha+beta+2.0)*0.5;
-    T1 = halfAmB * in + halfApBp2*y;
-
-    for(int n=2;n<=order;n++){
-
-      Linop.HermOp(*Tn,y);
-      y=xscale*y+mscale*(*Tn);
-
-      RealD cnp = 2.0*n*(n+alpha+beta)*(2.0*n-2.0+alpha+beta);
-      RealD cny = (2.0*n-2.0+alpha+beta)*(2.0*n-1.0+alpha+beta)*(2.0*n+alpha+beta);
-      RealD cn1 = (2.0*n+alpha+beta-1.0)*(alpha*alpha-beta*beta);
-      RealD cnm = - 2.0*(n+alpha-1.0)*(n+beta-1.0)*(2.0*n+alpha+beta);
-
-      //      Tnp= ( cny * y *Tn + cn1 * Tn + cnm * Tnm )/ cnp;                                                             
-      cny=cny/cnp;
-      cn1=cn1/cnp;
-      cn1=cn1/cnp;
-      cnm=cnm/cnp;
-
-      *Tnp=cny*y + cn1 *(*Tn) + cnm * (*Tnm);
-
-      // Cycle pointers to avoid copies                                                                                     
-      Field *swizzle = Tnm;
-      Tnm    =Tn;
-      Tn     =Tnp;
-      Tnp    =swizzle;
-    }
-    out=*Tnp;
-
-  }
-};
-NAMESPACE_END(Grid);
-#endif

Grid/algorithms/approx/MultiShiftFunction.cc

@@ -27,8 +27,7 @@ Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
     /*  END LEGAL */
 #include <Grid/GridCore.h>
 
-NAMESPACE_BEGIN(Grid);
-
+namespace Grid {
 double MultiShiftFunction::approx(double x)
 {
   double a = norm;
@@ -54,4 +53,4 @@ void MultiShiftFunction::csv(std::ostream &out)
   }
   return;
 }
-NAMESPACE_END(Grid);
+}

Grid/algorithms/approx/MultiShiftFunction.h

@@ -29,7 +29,7 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 #ifndef MULTI_SHIFT_FUNCTION
 #define MULTI_SHIFT_FUNCTION
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 class MultiShiftFunction {
 public:
@@ -63,5 +63,5 @@ public:
   }
 
 };
-NAMESPACE_END(Grid);
+}
 #endif

Grid/algorithms/approx/Remez.cc

@@ -298,7 +298,7 @@ void AlgRemez::stpini(bigfloat *step) {
 // Search for error maxima and minima
 void AlgRemez::search(bigfloat *step) {
   bigfloat a, q, xm, ym, xn, yn, xx0, xx1;
-  int i, meq, emsign, ensign, steps;
+  int i, j, meq, emsign, ensign, steps;
 
   meq = neq + 1;
   bigfloat *yy = new bigfloat[meq];
@@ -306,6 +306,7 @@ void AlgRemez::search(bigfloat *step) {
   bigfloat eclose = 1.0e30;
   bigfloat farther = 0l;
 
+  j = 1;
   xx0 = apstrt;
 
   for (i = 0; i < meq; i++) {

Grid/algorithms/approx/RemezGeneral.cc

@@ -1,473 +0,0 @@
-#include<math.h>
-#include<stdio.h>
-#include<stdlib.h>
-#include<string>
-#include<iostream>
-#include<iomanip>
-#include<cassert>
-
-#include<Grid/algorithms/approx/RemezGeneral.h>
-
-
-// Constructor
-AlgRemezGeneral::AlgRemezGeneral(double lower, double upper, long precision,
-				 bigfloat (*f)(bigfloat x, void *data), void *data): f(f), 
-										     data(data), 
-										     prec(precision),
-										     apstrt(lower), apend(upper), apwidt(upper - lower),
-										     n(0), d(0), pow_n(0), pow_d(0)
-{
-  bigfloat::setDefaultPrecision(prec);
-
-  std::cout<<"Approximation bounds are ["<<apstrt<<","<<apend<<"]\n";
-  std::cout<<"Precision of arithmetic is "<<precision<<std::endl;
-}
-
-//Determine the properties of the numerator and denominator polynomials
-void AlgRemezGeneral::setupPolyProperties(int num_degree, int den_degree, PolyType num_type_in, PolyType den_type_in){
-  pow_n = num_degree;
-  pow_d = den_degree;
-
-  if(pow_n % 2 == 0 && num_type_in == PolyType::Odd) assert(0);
-  if(pow_n % 2 == 1 && num_type_in == PolyType::Even) assert(0);
-
-  if(pow_d % 2 == 0 && den_type_in == PolyType::Odd) assert(0);
-  if(pow_d % 2 == 1 && den_type_in == PolyType::Even) assert(0);
-
-  num_type = num_type_in;
-  den_type = den_type_in;
-
-  num_pows.resize(pow_n+1);
-  den_pows.resize(pow_d+1);
-
-  int n_in = 0;
-  bool odd = num_type == PolyType::Full || num_type == PolyType::Odd;
-  bool even = num_type == PolyType::Full || num_type == PolyType::Even;
-  for(int i=0;i<=pow_n;i++){
-    num_pows[i] = -1;
-    if(i % 2 == 0 && even) num_pows[i] = n_in++;
-    if(i % 2 == 1 && odd) num_pows[i] = n_in++;
-  }
-
-  std::cout << n_in << " terms in numerator" << std::endl;
-  --n_in; //power is 1 less than the number of terms, eg  pow=1   a x^1  + b x^0
-
-  int d_in = 0;
-  odd = den_type == PolyType::Full || den_type == PolyType::Odd;
-  even = den_type == PolyType::Full || den_type == PolyType::Even;
-  for(int i=0;i<=pow_d;i++){
-    den_pows[i] = -1;
-    if(i % 2 == 0 && even) den_pows[i] = d_in++;
-    if(i % 2 == 1 && odd) den_pows[i] = d_in++;
-  }
-
-  std::cout << d_in << " terms in denominator" << std::endl;
-  --d_in;
-
-  n = n_in;
-  d = d_in;
-}
-
-//Setup algorithm
-void AlgRemezGeneral::reinitializeAlgorithm(){
-  spread = 1.0e37;
-  iter = 0;
-
-  neq = n + d + 1; //not +2 because highest-power term in denominator is fixed to 1
-
-  param.resize(neq);
-  yy.resize(neq+1);
-
-  //Initialize linear equation temporaries
-  A.resize(neq*neq);
-  B.resize(neq);
-  IPS.resize(neq);
-
-  //Initialize maximum and minimum errors
-  xx.resize(neq+2);
-  mm.resize(neq+1);
-  initialGuess();
-
-  //Initialize search steps
-  step.resize(neq+1);
-  stpini();
-}
-
-double AlgRemezGeneral::generateApprox(const int num_degree, const int den_degree, 
-				       const PolyType num_type_in, const PolyType den_type_in, 
-				       const double _tolerance, const int report_freq){
-  //Setup the properties of the polynomial
-  setupPolyProperties(num_degree, den_degree, num_type_in, den_type_in);
-
-  //Setup the algorithm
-  reinitializeAlgorithm();
-
-  bigfloat tolerance = _tolerance;
-
-  //Iterate until convergance
-  while (spread > tolerance) { 
-    if (iter++ % report_freq==0)
-      std::cout<<"Iteration " <<iter-1<<" spread "<<(double)spread<<" delta "<<(double)delta << std::endl; 
-
-    equations();
-    if (delta < tolerance) {
-      std::cout<<"Iteration " << iter-1 << " delta too small (" << delta << "<" << tolerance << "), try increasing precision\n";
-      assert(0);
-    };    
-    assert( delta>= tolerance );
-
-    search();
-  }
-
-  int sign;
-  double error = (double)getErr(mm[0],&sign);
-  std::cout<<"Converged at "<<iter<<" iterations; error = "<<error<<std::endl;
-
-  // Return the maximum error in the approximation
-  return error;
-}
-
-
-// Initial values of maximal and minimal errors
-void AlgRemezGeneral::initialGuess(){
-  // Supply initial guesses for solution points
-  long ncheb = neq;			// Degree of Chebyshev error estimate
-
-  // Find ncheb+1 extrema of Chebyshev polynomial
-  bigfloat a = ncheb;
-  bigfloat r;
-
-  mm[0] = apstrt;
-  for (long i = 1; i < ncheb; i++) {
-    r = 0.5 * (1 - cos((M_PI * i)/(double) a));
-    //r *= sqrt_bf(r);
-    r = (exp((double)r)-1.0)/(exp(1.0)-1.0);
-    mm[i] = apstrt + r * apwidt;
-  }
-  mm[ncheb] = apend;
-
-  a = 2.0 * ncheb;
-  for (long i = 0; i <= ncheb; i++) {
-    r = 0.5 * (1 - cos(M_PI * (2*i+1)/(double) a));
-    //r *= sqrt_bf(r); // Squeeze to low end of interval
-    r = (exp((double)r)-1.0)/(exp(1.0)-1.0);
-    xx[i] = apstrt + r * apwidt;
-  }
-}
-
-// Initialise step sizes
-void AlgRemezGeneral::stpini(){
-  xx[neq+1] = apend;
-  delta = 0.25;
-  step[0] = xx[0] - apstrt;
-  for (int i = 1; i < neq; i++) step[i] = xx[i] - xx[i-1];
-  step[neq] = step[neq-1];
-}
-
-// Search for error maxima and minima
-void AlgRemezGeneral::search(){
-  bigfloat a, q, xm, ym, xn, yn, xx1;
-  int emsign, ensign, steps;
-
-  int meq = neq + 1;
-
-  bigfloat eclose = 1.0e30;
-  bigfloat farther = 0l;
-
-  bigfloat xx0 = apstrt;
-
-  for (int i = 0; i < meq; i++) {
-    steps = 0;
-    xx1 = xx[i]; // Next zero
-    if (i == meq-1) xx1 = apend;
-    xm = mm[i];
-    ym = getErr(xm,&emsign);
-    q = step[i];
-    xn = xm + q;
-    if (xn < xx0 || xn >= xx1) {	// Cannot skip over adjacent boundaries
-      q = -q;
-      xn = xm;
-      yn = ym;
-      ensign = emsign;
-    } else {
-      yn = getErr(xn,&ensign);
-      if (yn < ym) {
-	q = -q;
-	xn = xm;
-	yn = ym;
-	ensign = emsign;
-      }
-    }
-  
-    while(yn >= ym) {		// March until error becomes smaller.
-      if (++steps > 10)
-      	break;
-      
-      ym = yn;
-      xm = xn;
-      emsign = ensign;
-      a = xm + q;
-      if (a == xm || a <= xx0 || a >= xx1)
-	break;// Must not skip over the zeros either side.      
-
-      xn = a;
-      yn = getErr(xn,&ensign);
-    }
-
-    mm[i] = xm;			// Position of maximum
-    yy[i] = ym;			// Value of maximum
-
-    if (eclose > ym) eclose = ym;
-    if (farther < ym) farther = ym;
-
-    xx0 = xx1; // Walk to next zero.
-  } // end of search loop
-
-  q = (farther - eclose);	// Decrease step size if error spread increased
-
-  if (eclose != 0.0) q /= eclose; // Relative error spread
-
-  if (q >= spread)
-    delta *= 0.5; // Spread is increasing; decrease step size
-  
-  spread = q;
-
-  for (int i = 0; i < neq; i++) {
-    q = yy[i+1];
-    if (q != 0.0) q = yy[i] / q  - (bigfloat)1l;
-    else q = 0.0625;
-    if (q > (bigfloat)0.25) q = 0.25;
-    q *= mm[i+1] - mm[i];
-    step[i] = q * delta;
-  }
-  step[neq] = step[neq-1];
-  
-  for (int i = 0; i < neq; i++) {	// Insert new locations for the zeros.
-    xm = xx[i] - step[i];
-
-    if (xm <= apstrt)
-      continue;
-
-    if (xm >= apend)
-      continue;
-
-    if (xm <= mm[i])
-      xm = (bigfloat)0.5 * (mm[i] + xx[i]);    
-
-    if (xm >= mm[i+1])
-      xm = (bigfloat)0.5 * (mm[i+1] + xx[i]);
-    
-    xx[i] = xm;
-  }
-}
-
-// Solve the equations
-void AlgRemezGeneral::equations(){
-  bigfloat x, y, z;
-  bigfloat *aa;
-  
-  for (int i = 0; i < neq; i++) {	// set up the equations for solution by simq()
-    int ip = neq * i;		// offset to 1st element of this row of matrix
-    x = xx[i];			// the guess for this row
-    y = func(x);		// right-hand-side vector
-
-    z = (bigfloat)1l;
-    aa = A.data()+ip;
-    int t = 0;
-    for (int j = 0; j <= pow_n; j++) {
-      if(num_pows[j] != -1){ *aa++ = z; t++; }
-      z *= x;
-    }
-    assert(t == n+1);
-
-    z = (bigfloat)1l;
-    t = 0;
-    for (int j = 0; j < pow_d; j++) {
-      if(den_pows[j] != -1){ *aa++ = -y * z; t++; }
-      z *= x;
-    }
-    assert(t == d);
-
-    B[i] = y * z;		// Right hand side vector
-  }
-
-  // Solve the simultaneous linear equations.
-  if (simq()){
-    std::cout<<"simq failed\n";
-    exit(0);
-  }
-}
-
-
-// Evaluate the rational form P(x)/Q(x) using coefficients
-// from the solution vector param
-bigfloat AlgRemezGeneral::approx(const bigfloat x) const{
-  // Work backwards toward the constant term.
-  int c = n;
-  bigfloat yn = param[c--];		// Highest order numerator coefficient
-  for (int i = pow_n-1; i >= 0; i--) yn = x * yn  +  (num_pows[i] != -1 ? param[c--] : bigfloat(0l));  
-
-  c = n+d;
-  bigfloat yd = 1l; //Highest degree coefficient is 1.0
-  for (int i = pow_d-1; i >= 0; i--) yd = x * yd  +  (den_pows[i] != -1 ? param[c--] : bigfloat(0l)); 
-
-  return(yn/yd);
-}
-
-// Compute size and sign of the approximation error at x
-bigfloat AlgRemezGeneral::getErr(bigfloat x, int *sign) const{
-  bigfloat f = func(x);
-  bigfloat e = approx(x) - f;
-  if (f != 0) e /= f;
-  if (e < (bigfloat)0.0) {
-    *sign = -1;
-    e = -e;
-  }
-  else *sign = 1;
-  
-  return(e);
-}
-
-// Solve the system AX=B
-int AlgRemezGeneral::simq(){
-
-  int ip, ipj, ipk, ipn;
-  int idxpiv;
-  int kp, kp1, kpk, kpn;
-  int nip, nkp;
-  bigfloat em, q, rownrm, big, size, pivot, sum;
-  bigfloat *aa;
-  bigfloat *X = param.data();
-
-  int n = neq;
-  int nm1 = n - 1;
-  // Initialize IPS and X
-  
-  int ij = 0;
-  for (int i = 0; i < n; i++) {
-    IPS[i] = i;
-    rownrm = 0.0;
-    for(int j = 0; j < n; j++) {
-      q = abs_bf(A[ij]);
-      if(rownrm < q) rownrm = q;
-      ++ij;
-    }
-    if (rownrm == (bigfloat)0l) {
-      std::cout<<"simq rownrm=0\n";
-      return(1);
-    }
-    X[i] = (bigfloat)1.0 / rownrm;
-  }
-  
-  for (int k = 0; k < nm1; k++) {
-    big = 0.0;
-    idxpiv = 0;
-    
-    for (int i = k; i < n; i++) {
-      ip = IPS[i];
-      ipk = n*ip + k;
-      size = abs_bf(A[ipk]) * X[ip];
-      if (size > big) {
-	big = size;
-	idxpiv = i;
-      }
-    }
-    
-    if (big == (bigfloat)0l) {
-      std::cout<<"simq big=0\n";
-      return(2);
-    }
-    if (idxpiv != k) {
-      int j = IPS[k];
-      IPS[k] = IPS[idxpiv];
-      IPS[idxpiv] = j;
-    }
-    kp = IPS[k];
-    kpk = n*kp + k;
-    pivot = A[kpk];
-    kp1 = k+1;
-    for (int i = kp1; i < n; i++) {
-      ip = IPS[i];
-      ipk = n*ip + k;
-      em = -A[ipk] / pivot;
-      A[ipk] = -em;
-      nip = n*ip;
-      nkp = n*kp;
-      aa = A.data()+nkp+kp1;
-      for (int j = kp1; j < n; j++) {
-	ipj = nip + j;
-	A[ipj] = A[ipj] + em * *aa++;
-      }
-    }
-  }
-  kpn = n * IPS[n-1] + n - 1;	// last element of IPS[n] th row
-  if (A[kpn] == (bigfloat)0l) {
-    std::cout<<"simq A[kpn]=0\n";
-    return(3);
-  }
-
-  
-  ip = IPS[0];
-  X[0] = B[ip];
-  for (int i = 1; i < n; i++) {
-    ip = IPS[i];
-    ipj = n * ip;
-    sum = 0.0;
-    for (int j = 0; j < i; j++) {
-      sum += A[ipj] * X[j];
-      ++ipj;
-    }
-    X[i] = B[ip] - sum;
-  }
-  
-  ipn = n * IPS[n-1] + n - 1;
-  X[n-1] = X[n-1] / A[ipn];
-  
-  for (int iback = 1; iback < n; iback++) {
-    //i goes (n-1),...,1
-    int i = nm1 - iback;
-    ip = IPS[i];
-    nip = n*ip;
-    sum = 0.0;
-    aa = A.data()+nip+i+1;
-    for (int j= i + 1; j < n; j++) 
-      sum += *aa++ * X[j];
-    X[i] = (X[i] - sum) / A[nip+i];
-  }
-  
-  return(0);
-}
-
-void AlgRemezGeneral::csv(std::ostream & os) const{
-  os << "Numerator" << std::endl;
-  for(int i=0;i<=pow_n;i++){
-    os << getCoeffNum(i) << "*x^" << i;
-    if(i!=pow_n) os << " + ";
-  }
-  os << std::endl;
-
-  os << "Denominator" << std::endl;
-  for(int i=0;i<=pow_d;i++){
-    os << getCoeffDen(i) << "*x^" << i;
-    if(i!=pow_d) os << " + ";
-  }
-  os << std::endl;
-
-  //For a true minimax solution the errors should all be equal and the signs should oscillate +-+-+- etc
-  int sign;
-  os << "Errors at maxima: coordinate, error, (sign)" << std::endl;
-  for(int i=0;i<neq+1;i++){ 
-    os << mm[i] << " " << getErr(mm[i],&sign) << " (" << sign << ")" << std::endl;
-  }
-
-  os << "Scan over range:" << std::endl;
-  int npt = 60;
-  bigfloat dlt = (apend - apstrt)/bigfloat(npt-1);
-
-  for (bigfloat x=apstrt; x<=apend; x = x + dlt) {
-    double f = evaluateFunc(x);
-    double r = evaluateApprox(x);
-    os<< x<<","<<r<<","<<f<<","<<r-f<<std::endl;
-  }
-  return;
-}

Grid/algorithms/approx/RemezGeneral.h

@@ -1,170 +0,0 @@
-/*
-  C.Kelly Jan 2020 based on implementation by M. Clark May 2005
-
-  AlgRemezGeneral is an implementation of the Remez algorithm for approximating an arbitrary function by a rational polynomial 
-  It includes optional restriction to odd/even polynomials for the numerator and/or denominator
-*/
-
-#ifndef INCLUDED_ALG_REMEZ_GENERAL_H
-#define INCLUDED_ALG_REMEZ_GENERAL_H
-
-#include <stddef.h>
-#include <Grid/GridStd.h>
-
-#ifdef HAVE_LIBGMP
-#include "bigfloat.h"
-#else
-#include "bigfloat_double.h"
-#endif
-
-
-class AlgRemezGeneral{
- public:
-  enum PolyType { Even, Odd, Full };
-
- private:
-
-  // In GSL-style, pass the function as a function pointer. Any data required to evaluate the function is passed in as a void pointer
-  bigfloat (*f)(bigfloat x, void *data);
-  void *data;
-
-  // The approximation parameters
-  std::vector<bigfloat> param;
-  bigfloat norm;
-
-  // The number of non-zero terms in the numerator and denominator
-  int n, d;
-  // The numerator and denominator degree (i.e.  the largest power)
-  int pow_n, pow_d;
-  
-  // Specify if the numerator and/or denominator are odd/even polynomials
-  PolyType num_type;
-  PolyType den_type;
-  std::vector<int> num_pows; //contains the mapping, with -1 if not present
-  std::vector<int> den_pows;
-
-  // The bounds of the approximation
-  bigfloat apstrt, apwidt, apend;
-
-  // Variables used to calculate the approximation
-  int nd1, iter;
-  std::vector<bigfloat> xx;
-  std::vector<bigfloat> mm;
-  std::vector<bigfloat> step;
-
-  bigfloat delta, spread;
-  
-  // Variables used in search
-  std::vector<bigfloat> yy;
-
-  // Variables used in solving linear equations
-  std::vector<bigfloat> A;
-  std::vector<bigfloat> B;
-  std::vector<int> IPS;
-
-  // The number of equations we must solve at each iteration (n+d+1)
-  int neq;
-
-  // The precision of the GNU MP library
-  long prec;
-
-  // Initialize member variables associated with the polynomial's properties
-  void setupPolyProperties(int num_degree, int den_degree, PolyType num_type_in, PolyType den_type_in);
-
-  // Initial values of maximal and minmal errors
-  void initialGuess();
-
-  // Initialise step sizes
-  void stpini();
-
-  // Initialize the algorithm
-  void reinitializeAlgorithm();
-
-  // Solve the equations
-  void equations();
-
-  // Search for error maxima and minima
-  void search(); 
-
-  // Calculate function required for the approximation
-  inline bigfloat func(bigfloat x) const{
-    return f(x, data);
-  }
-
-  // Compute size and sign of the approximation error at x
-  bigfloat getErr(bigfloat x, int *sign) const;
-
-  // Solve the system AX=B   where X = param
-  int simq();
-
-  // Evaluate the rational form P(x)/Q(x) using coefficients from the solution vector param
-  bigfloat approx(bigfloat x) const;
-
- public:
-  
-  AlgRemezGeneral(double lower, double upper, long prec,
-		  bigfloat (*f)(bigfloat x, void *data), void *data);
-
-  inline int getDegree(void) const{ 
-    assert(n==d);
-    return n;
-  }
-  // Reset the bounds of the approximation
-  inline void setBounds(double lower, double upper) {
-    apstrt = lower;
-    apend = upper;
-    apwidt = apend - apstrt;
-  }
-
-  // Get the bounds of the approximation
-  inline void getBounds(double &lower, double &upper) const{ 
-    lower=(double)apstrt;
-    upper=(double)apend;
-  }
-
-  // Run the algorithm to generate the rational approximation
-  double generateApprox(int num_degree, int den_degree, 
-			PolyType num_type, PolyType den_type,
-			const double tolerance = 1e-15, const int report_freq = 1000);
-  
-  inline double generateApprox(int num_degree, int den_degree, 
-			       const double tolerance = 1e-15, const int report_freq = 1000){
-    return generateApprox(num_degree, den_degree, Full, Full, tolerance, report_freq);
-  }
-  
-  // Evaluate the rational form P(x)/Q(x) using coefficients from the
-  // solution vector param
-  inline double evaluateApprox(double x) const{
-    return (double)approx((bigfloat)x);
-  }
-
-  // Evaluate the rational form Q(x)/P(x) using coefficients from the solution vector param
-  inline double evaluateInverseApprox(double x) const{
-    return 1.0/(double)approx((bigfloat)x);
-  }  
-
-  // Calculate function required for the approximation
-  inline double evaluateFunc(double x) const{
-    return (double)func((bigfloat)x);
-  }
-
-  // Calculate inverse function required for the approximation
-  inline double evaluateInverseFunc(double x) const{
-    return 1.0/(double)func((bigfloat)x);
-  }
-
-  // Dump csv of function, approx and error
-  void csv(std::ostream &os = std::cout) const;
-
-  // Get the coefficient of the term x^i in the numerator
-  inline double getCoeffNum(const int i) const{    
-    return num_pows[i] == -1 ? 0. : double(param[num_pows[i]]);
-  }
-  // Get the coefficient of the term x^i in the denominator
-  inline double getCoeffDen(const int i) const{ 
-    if(i == pow_d) return 1.0;
-    else return den_pows[i] == -1 ? 0. : double(param[den_pows[i]+n+1]); 
-  }
-};
-
-#endif

Grid/algorithms/approx/ZMobius.cc

@@ -1,183 +0,0 @@
-/*************************************************************************************
-
-    Grid physics library, www.github.com/paboyle/Grid 
-
-    Source file: ./lib/algorithms/approx/ZMobius.cc
-
-    Copyright (C) 2015
-
-Author: Christopher Kelly <ckelly@phys.columbia.edu>
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License along
-    with this program; if not, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-    See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
-
-#include <Grid/algorithms/approx/ZMobius.h>
-#include <Grid/algorithms/approx/RemezGeneral.h>
-
-NAMESPACE_BEGIN(Grid);
-NAMESPACE_BEGIN(Approx);
-
-//Compute the tanh approximation
-inline double epsilonMobius(const double x, const std::vector<ComplexD> &w){
-  int Ls = w.size();
-
-  ComplexD fxp = 1., fmp = 1.;
-  for(int i=0;i<Ls;i++){
-    fxp = fxp * ( w[i] + x );
-    fmp = fmp * ( w[i] - x );
-  }
-  return ((fxp - fmp)/(fxp + fmp)).real();
-}
-inline double epsilonMobius(const double x, const std::vector<RealD> &w){
-  int Ls = w.size();
-
-  double fxp = 1., fmp = 1.;
-  for(int i=0;i<Ls;i++){
-    fxp = fxp * ( w[i] + x );
-    fmp = fmp * ( w[i] - x );
-  }
-  return (fxp - fmp)/(fxp + fmp);
-}
-
-
-
-//Compute the tanh approximation in a form suitable for the Remez
-bigfloat epsilonMobius(bigfloat x, void* data){
-  const std::vector<RealD> &omega = *( (std::vector<RealD> const*)data );
-  bigfloat fxp(1.0);
-  bigfloat fmp(1.0);
-
-  for(int i=0;i<omega.size();i++){
-    fxp = fxp * ( bigfloat(omega[i]) + x);
-    fmp = fmp * ( bigfloat(omega[i]) - x);
-  }
-  return (fxp - fmp)/(fxp + fmp);
-}
-
-//Compute the Zmobius Omega parameters suitable for eigenvalue range   -lambda_bound <= lambda <= lambda_bound
-//Note omega_i = 1/(b_i + c_i)   where b_i and c_i are the Mobius parameters
-void computeZmobiusOmega(std::vector<ComplexD> &omega_out, const int Ls_out,
-			 const std::vector<RealD> &omega_in, const int Ls_in,
-			 const RealD lambda_bound){
-  assert(omega_in.size() == Ls_in);
-  omega_out.resize(Ls_out);
-
-  //Use the Remez algorithm to generate the appropriate rational polynomial
-  //For odd polynomial, to satisfy Haar condition must take either positive or negative half of range (cf https://arxiv.org/pdf/0803.0439.pdf page 6)  
-  AlgRemezGeneral remez(0, lambda_bound, 64, &epsilonMobius, (void*)&omega_in); 
-  remez.generateApprox(Ls_out-1, Ls_out,AlgRemezGeneral::Odd, AlgRemezGeneral::Even, 1e-15, 100);
-  remez.csv(std::cout);
-
-  //The rational approximation has the form  [ f(x) - f(-x) ] / [ f(x) + f(-x) ]  where  f(x) = \Prod_{i=0}^{L_s-1} ( \omega_i + x )
-  //cf https://academiccommons.columbia.edu/doi/10.7916/D8T72HD7  pg 102
-  //omega_i are therefore the negative of the complex roots of f(x)
-
-  //We can find the roots by recognizing that the eigenvalues of a matrix A are the roots of the characteristic polynomial
-  // \rho(\lambda) = det( A - \lambda I )    where I is the unit matrix
-  //The matrix whose characteristic polynomial is an arbitrary monic polynomial a0 + a1 x + a2 x^2 + ... x^n   is the companion matrix 
-  // A = | 0    1   0    0 0 .... 0 |
-  //     | 0    0   1    0 0 .... 0 |
-  //     | :    :   :    : :      : |
-  //     | 0    0   0    0 0      1
-  //     | -a0 -a1 -a2  ...  ... -an|
-
-
-  //Note the Remez defines the largest power to have unit coefficient
-  std::vector<RealD> coeffs(Ls_out+1);
-  for(int i=0;i<Ls_out+1;i+=2) coeffs[i] = coeffs[i] = remez.getCoeffDen(i); //even powers
-  for(int i=1;i<Ls_out+1;i+=2) coeffs[i] = coeffs[i] = remez.getCoeffNum(i); //odd powers
-
-  std::vector<std::complex<RealD> > roots(Ls_out);
-
-  //Form the companion matrix
-  Eigen::MatrixXd compn(Ls_out,Ls_out);
-  for(int i=0;i<Ls_out-1;i++) compn(i,0) = 0.;
-  compn(Ls_out - 1, 0) = -coeffs[0];
-  
-  for(int j=1;j<Ls_out;j++){
-    for(int i=0;i<Ls_out-1;i++) compn(i,j) = i == j-1 ? 1. : 0.;
-    compn(Ls_out - 1, j) = -coeffs[j];
-  }
-
-  //Eigensolve
-  Eigen::EigenSolver<Eigen::MatrixXd> slv(compn, false);
-
-  const auto & ev = slv.eigenvalues();
-  for(int i=0;i<Ls_out;i++)
-    omega_out[i] = -ev(i);
-
-  //Sort ascending (smallest at start of vector!)
-  std::sort(omega_out.begin(), omega_out.end(), 
-	    [&](const ComplexD &a, const ComplexD &b){ return a.real() < b.real() || (a.real() == b.real() && a.imag() < b.imag()); });
-
-  //McGlynn thesis pg 122 suggest improved iteration counts if magnitude of omega diminishes towards the center of the 5th dimension
-  std::vector<ComplexD> omega_tmp = omega_out;
-  int s_low=0, s_high=Ls_out-1, ss=0;
-  for(int s_from = Ls_out-1; s_from >= 0; s_from--){ //loop from largest omega
-    int s_to;
-    if(ss % 2 == 0){
-      s_to = s_low++;
-    }else{
-      s_to = s_high--;
-    }
-    omega_out[s_to] = omega_tmp[s_from];
-    ++ss;
-  }
-  
-  std::cout << "Resulting omega_i:" << std::endl;  
-  for(int i=0;i<Ls_out;i++)
-    std::cout << omega_out[i] << std::endl;
-
-  std::cout << "Test result matches the approximate polynomial found by the Remez" << std::endl;
-  std::cout << "<x> <remez approx> <poly approx> <diff poly approx remez approx> <exact> <diff poly approx exact>\n";
-  
-  int npt = 60;
-  double dlt = lambda_bound/double(npt-1);
-
-  for (int i =0; i<npt; i++){
-    double x = i*dlt;
-    double r = remez.evaluateApprox(x);
-    double p = epsilonMobius(x, omega_out);
-    double e = epsilonMobius(x, omega_in);
-
-    std::cout << x<< " " << r << " " << p <<" " <<r-p << " " << e << " " << e-p << std::endl;
-  }
-
-}
-  
-//mobius_param = b+c   with b-c=1
-void computeZmobiusOmega(std::vector<ComplexD> &omega_out, const int Ls_out, const RealD mobius_param, const int Ls_in, const RealD lambda_bound){
-  std::vector<RealD> omega_in(Ls_in, 1./mobius_param);
-  computeZmobiusOmega(omega_out, Ls_out, omega_in, Ls_in, lambda_bound);
-}
-
-//ZMobius class takes  gamma_i = (b+c) omega_i as its input, where b, c are factored out
-void computeZmobiusGamma(std::vector<ComplexD> &gamma_out, 
-			 const RealD mobius_param_out, const int Ls_out, 
-			 const RealD mobius_param_in, const int Ls_in,
-			 const RealD lambda_bound){
-  computeZmobiusOmega(gamma_out, Ls_out, mobius_param_in, Ls_in, lambda_bound);
-  for(int i=0;i<Ls_out;i++) gamma_out[i] = gamma_out[i] * mobius_param_out;
-}
-//Assumes mobius_param_out == mobius_param_in
-void computeZmobiusGamma(std::vector<ComplexD> &gamma_out, const int Ls_out, const RealD mobius_param, const int Ls_in, const RealD lambda_bound){
-  computeZmobiusGamma(gamma_out, mobius_param, Ls_out, mobius_param, Ls_in, lambda_bound);
-}
-
-NAMESPACE_END(Approx);
-NAMESPACE_END(Grid);

Grid/algorithms/approx/ZMobius.h

@@ -1,57 +0,0 @@
-/*************************************************************************************
-
-    Grid physics library, www.github.com/paboyle/Grid 
-
-    Source file: ./lib/algorithms/approx/ZMobius.h
-
-    Copyright (C) 2015
-
-Author: Christopher Kelly <ckelly@phys.columbia.edu>
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License along
-    with this program; if not, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-    See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
-#ifndef GRID_ZMOBIUS_APPROX_H
-#define GRID_ZMOBIUS_APPROX_H
-
-#include <Grid/GridCore.h>
-
-NAMESPACE_BEGIN(Grid);
-NAMESPACE_BEGIN(Approx);
-
-//Compute the Zmobius Omega parameters suitable for eigenvalue range   -lambda_bound <= lambda <= lambda_bound
-//Note omega_i = 1/(b_i + c_i)   where b_i and c_i are the Mobius parameters
-void computeZmobiusOmega(std::vector<ComplexD> &omega_out, const int Ls_out,
-			 const std::vector<RealD> &omega_in, const int Ls_in,
-			 const RealD lambda_bound);
-  
-//mobius_param = b+c   with b-c=1
-void computeZmobiusOmega(std::vector<ComplexD> &omega_out, const int Ls_out, const RealD mobius_param, const int Ls_in, const RealD lambda_bound);
-
-//ZMobius class takes  gamma_i = (b+c) omega_i as its input, where b, c are factored out
-void computeZmobiusGamma(std::vector<ComplexD> &gamma_out, 
-			 const RealD mobius_param_out, const int Ls_out, 
-			 const RealD mobius_param_in, const int Ls_in,
-			 const RealD lambda_bound);
-
-//Assumes mobius_param_out == mobius_param_in
-void computeZmobiusGamma(std::vector<ComplexD> &gamma_out, const int Ls_out, const RealD mobius_param, const int Ls_in, const RealD lambda_bound);
-
-NAMESPACE_END(Approx);
-NAMESPACE_END(Grid);
-
-#endif

Grid/algorithms/approx/Zolotarev.cc

@@ -58,8 +58,8 @@
 
 /* Compute the partial fraction expansion coefficients (alpha) from the
  * factored form */
-NAMESPACE_BEGIN(Grid);
-NAMESPACE_BEGIN(Approx);
+namespace Grid {
+namespace Approx {
 
 static void construct_partfrac(izd *z) {
   int dn = z -> dn, dd = z -> dd, type = z -> type;
@@ -516,9 +516,7 @@ zolotarev_data* higham(PRECISION epsilon, int n) {
   free(d);
   return zd;
 }
-
-NAMESPACE_END(Approx);
-NAMESPACE_END(Grid);
+}}
 
 #ifdef TEST
 
@@ -587,7 +585,6 @@ static PRECISION zolotarev_cayley_eval(PRECISION x, zolotarev_data* rdata) {
   return (ONE - T) / (ONE + T);
 }
 
-
 /* Test program. Apart from printing out the parameters for R(x) it produces
  * the following data files for plotting (unless NPLOT is defined):
  *
@@ -726,5 +723,5 @@ int main(int argc, char** argv) {
   return EXIT_SUCCESS;
 }
 
-#endif /* TEST */
 
+#endif /* TEST */

Grid/algorithms/approx/Zolotarev.h

@@ -1,13 +1,13 @@
 /* -*- Mode: C; comment-column: 22; fill-column: 79; -*- */
 
 #ifdef __cplusplus
-#include <Grid/Namespace.h>
-NAMESPACE_BEGIN(Grid);
-NAMESPACE_BEGIN(Approx);
+namespace Grid {
+namespace Approx {
 #endif
 
 #define HVERSION Header Time-stamp: <14-OCT-2004 09:26:51.00 adk@MISSCONTRARY>
 
+
 #ifndef ZOLOTAREV_INTERNAL
 #ifndef PRECISION
 #define PRECISION double
@@ -83,6 +83,5 @@ void zolotarev_free(zolotarev_data *zdata);
 #endif
 
 #ifdef __cplusplus
-NAMESPACE_END(Approx);
-NAMESPACE_END(Grid);
+}}
 #endif

Grid/algorithms/approx/bigfloat.h

@@ -10,12 +10,10 @@
 #ifndef INCLUDED_BIGFLOAT_H
 #define INCLUDED_BIGFLOAT_H
 
-#define __GMP_WITHIN_CONFIGURE
+
 #include <gmp.h>
 #include <mpf2mpfr.h>
 #include <mpfr.h>
-#undef  __GMP_WITHIN_CONFIGURE
-
 class bigfloat {
 
 private:

Grid/algorithms/approx/bigfloat_double.h

@@ -25,10 +25,6 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     See the full license in the file "LICENSE" in the top level distribution directory
     *************************************************************************************/
     /*  END LEGAL */
-
-#ifndef INCLUDED_BIGFLOAT_DOUBLE_H
-#define INCLUDED_BIGFLOAT_DOUBLE_H
-
 #include <math.h>
 
 typedef double mfloat; 
@@ -190,6 +186,4 @@ public:
   //  friend bigfloat& random(void);
 };
 
-#endif
-
 

Grid/algorithms/iterative/AdefGeneric.h

@@ -90,8 +90,8 @@ class TwoLevelFlexiblePcg : public LinearFunction<Field>
   void operator() (const Field &src, Field &psi){
   void operator() (const Field &src, Field &psi){
 
-    psi.Checkerboard() = src.Checkerboard();
-    grid             = src.Grid();
+    psi.checkerboard = src.checkerboard;
+    grid             = src._grid;
 
     RealD f;
     RealD rtzp,rtz,a,d,b;

Grid/algorithms/iterative/BiCGSTAB.h

@@ -1,222 +0,0 @@
-/*************************************************************************************
-
-Grid physics library, www.github.com/paboyle/Grid
-
-Source file: ./lib/algorithms/iterative/BiCGSTAB.h
-
-Copyright (C) 2015
-
-Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
-Author: Peter Boyle <paboyle@ph.ed.ac.uk>
-Author: paboyle <paboyle@ph.ed.ac.uk>
-Author: juettner <juettner@soton.ac.uk>
-Author: David Murphy <djmurphy@mit.edu>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-See the full license in the file "LICENSE" in the top level distribution
-directory
-*************************************************************************************/
-/*  END LEGAL */
-
-#ifndef GRID_BICGSTAB_H
-#define GRID_BICGSTAB_H
-
-NAMESPACE_BEGIN(Grid);
-
-/////////////////////////////////////////////////////////////
-// Base classes for iterative processes based on operators
-// single input vec, single output vec.
-/////////////////////////////////////////////////////////////
-
-template <class Field>
-class BiCGSTAB : public OperatorFunction<Field> 
-{
-  public:
-    using OperatorFunction<Field>::operator();
-    
-    bool ErrorOnNoConverge;  // throw an assert when the CG fails to converge.
-                             // Defaults true.
-    RealD Tolerance;
-    Integer MaxIterations;
-    Integer IterationsToComplete; //Number of iterations the CG took to finish. Filled in upon completion
-  
-    BiCGSTAB(RealD tol, Integer maxit, bool err_on_no_conv = true) : 
-      Tolerance(tol), MaxIterations(maxit), ErrorOnNoConverge(err_on_no_conv){};
-
-    void operator()(LinearOperatorBase<Field>& Linop, const Field& src, Field& psi) 
-    {
-      psi.Checkerboard() = src.Checkerboard();
-      conformable(psi, src);
-
-      RealD cp(0), rho(1), rho_prev(0), alpha(1), beta(0), omega(1);
-      RealD a(0), bo(0), b(0), ssq(0);
-
-      Field p(src);
-      Field r(src);
-      Field rhat(src);
-      Field v(src);
-      Field s(src);
-      Field t(src);
-      Field h(src);
-
-      v = Zero();
-      p = Zero();
-
-      // Initial residual computation & set up
-      RealD guess = norm2(psi);
-      assert(std::isnan(guess) == 0);
-    
-      Linop.Op(psi, v);
-      b = norm2(v);
-
-      r = src - v;
-      rhat = r;
-      a = norm2(r);
-      ssq = norm2(src);
-
-      std::cout << GridLogIterative << std::setprecision(8) << "BiCGSTAB: guess " << guess << std::endl;
-      std::cout << GridLogIterative << std::setprecision(8) << "BiCGSTAB:   src " << ssq << std::endl;
-      std::cout << GridLogIterative << std::setprecision(8) << "BiCGSTAB:    mp " << b << std::endl;
-      std::cout << GridLogIterative << std::setprecision(8) << "BiCGSTAB:     r " << a << std::endl;
-
-      RealD rsq = Tolerance * Tolerance * ssq;
-
-      // Check if guess is really REALLY good :)
-      if(a <= rsq){ return; }
-
-      std::cout << GridLogIterative << std::setprecision(8) << "BiCGSTAB: k=0 residual " << a << " target " << rsq << std::endl;
-
-      GridStopWatch LinalgTimer;
-      GridStopWatch InnerTimer;
-      GridStopWatch AxpyNormTimer;
-      GridStopWatch LinearCombTimer;
-      GridStopWatch MatrixTimer;
-      GridStopWatch SolverTimer;
-
-      SolverTimer.Start();
-      int k;
-      for (k = 1; k <= MaxIterations; k++) 
-      {
-        rho_prev = rho;
-
-        LinalgTimer.Start();
-        InnerTimer.Start();
-        ComplexD Crho  = innerProduct(rhat,r);
-        InnerTimer.Stop();
-        rho = Crho.real();
-
-        beta = (rho / rho_prev) * (alpha / omega);
-
-        LinearCombTimer.Start();
-        bo = beta * omega;
-        auto p_v = p.View();
-        auto r_v = r.View();
-        auto v_v = v.View();
-        accelerator_for(ss, p_v.size(), Field::vector_object::Nsimd(),{
-          coalescedWrite(p_v[ss], beta*p_v(ss) - bo*v_v(ss) + r_v(ss));
-        });
-        LinearCombTimer.Stop();
-        LinalgTimer.Stop();
-
-        MatrixTimer.Start();
-        Linop.Op(p,v);
-        MatrixTimer.Stop();
-
-        LinalgTimer.Start();
-        InnerTimer.Start();
-        ComplexD Calpha = innerProduct(rhat,v);
-        InnerTimer.Stop();
-        alpha = rho / Calpha.real();
-
-        LinearCombTimer.Start();
-        auto h_v = h.View();
-        auto psi_v = psi.View();
-        accelerator_for(ss, h_v.size(), Field::vector_object::Nsimd(),{
-          coalescedWrite(h_v[ss], alpha*p_v(ss) + psi_v(ss));
-        });
-        
-        auto s_v = s.View();
-        accelerator_for(ss, s_v.size(), Field::vector_object::Nsimd(),{
-          coalescedWrite(s_v[ss], -alpha*v_v(ss) + r_v(ss));
-        });
-        LinearCombTimer.Stop();
-        LinalgTimer.Stop();
-
-        MatrixTimer.Start();
-        Linop.Op(s,t);
-        MatrixTimer.Stop();
-
-        LinalgTimer.Start();
-        InnerTimer.Start();
-        ComplexD Comega = innerProduct(t,s);
-        InnerTimer.Stop();
-        omega = Comega.real() / norm2(t);
-
-        LinearCombTimer.Start();
-        auto t_v = t.View();
-        accelerator_for(ss, psi_v.size(), Field::vector_object::Nsimd(),{
-          coalescedWrite(psi_v[ss], h_v(ss) + omega * s_v(ss));
-          coalescedWrite(r_v[ss], -omega * t_v(ss) + s_v(ss));
-        });
-        LinearCombTimer.Stop();
-
-        cp = norm2(r);
-        LinalgTimer.Stop();
-
-        std::cout << GridLogIterative << "BiCGSTAB: Iteration " << k << " residual " << sqrt(cp/ssq) << " target " << Tolerance << std::endl;
-
-        // Stopping condition
-        if(cp <= rsq) 
-        {
-          SolverTimer.Stop();
-          Linop.Op(psi, v);
-          p = v - src;
-
-          RealD srcnorm = sqrt(norm2(src));
-          RealD resnorm = sqrt(norm2(p));
-          RealD true_residual = resnorm / srcnorm;
-
-          std::cout << GridLogMessage << "BiCGSTAB Converged on iteration " << k << std::endl;
-          std::cout << GridLogMessage << "\tComputed residual " << sqrt(cp/ssq) << std::endl;
-          std::cout << GridLogMessage << "\tTrue residual " << true_residual << std::endl;
-          std::cout << GridLogMessage << "\tTarget " << Tolerance << std::endl;
-
-          std::cout << GridLogMessage << "Time breakdown " << std::endl;
-          std::cout << GridLogMessage << "\tElapsed    " << SolverTimer.Elapsed() << std::endl;
-          std::cout << GridLogMessage << "\tMatrix     " << MatrixTimer.Elapsed() << std::endl;
-          std::cout << GridLogMessage << "\tLinalg     " << LinalgTimer.Elapsed() << std::endl;
-          std::cout << GridLogMessage << "\tInner      " << InnerTimer.Elapsed() << std::endl;
-          std::cout << GridLogMessage << "\tAxpyNorm   " << AxpyNormTimer.Elapsed() << std::endl;
-          std::cout << GridLogMessage << "\tLinearComb " << LinearCombTimer.Elapsed() << std::endl;
-
-          if(ErrorOnNoConverge){ assert(true_residual / Tolerance < 10000.0); }
-
-          IterationsToComplete = k;	
-
-          return;
-        }
-      }
-      
-      std::cout << GridLogMessage << "BiCGSTAB did NOT converge" << std::endl;
-
-      if(ErrorOnNoConverge){ assert(0); }
-      IterationsToComplete = k;
-    }
-};
-
-NAMESPACE_END(Grid);
-
-#endif

Grid/algorithms/iterative/BiCGSTABMixedPrec.h

@@ -1,158 +0,0 @@
-/*************************************************************************************
-
-Grid physics library, www.github.com/paboyle/Grid 
-
-Source file: ./lib/algorithms/iterative/BiCGSTABMixedPrec.h
-
-Copyright (C) 2015
-
-Author: Christopher Kelly <ckelly@phys.columbia.edu>
-Author: David Murphy <djmurphy@mit.edu>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
-
-#ifndef GRID_BICGSTAB_MIXED_PREC_H
-#define GRID_BICGSTAB_MIXED_PREC_H
-
-NAMESPACE_BEGIN(Grid);
-
-// Mixed precision restarted defect correction BiCGSTAB
-template<class FieldD, class FieldF, typename std::enable_if< getPrecision<FieldD>::value == 2, int>::type = 0, typename std::enable_if< getPrecision<FieldF>::value == 1, int>::type = 0> 
-class MixedPrecisionBiCGSTAB : public LinearFunction<FieldD> 
-{
-  public:                                                
-    RealD   Tolerance;
-    RealD   InnerTolerance; // Initial tolerance for inner CG. Defaults to Tolerance but can be changed
-    Integer MaxInnerIterations;
-    Integer MaxOuterIterations;
-    GridBase* SinglePrecGrid; // Grid for single-precision fields
-    RealD OuterLoopNormMult; // Stop the outer loop and move to a final double prec solve when the residual is OuterLoopNormMult * Tolerance
-    LinearOperatorBase<FieldF> &Linop_f;
-    LinearOperatorBase<FieldD> &Linop_d;
-
-    Integer TotalInnerIterations; //Number of inner CG iterations
-    Integer TotalOuterIterations; //Number of restarts
-    Integer TotalFinalStepIterations; //Number of CG iterations in final patch-up step
-
-    //Option to speed up *inner single precision* solves using a LinearFunction that produces a guess
-    LinearFunction<FieldF> *guesser;
-    
-    MixedPrecisionBiCGSTAB(RealD tol, Integer maxinnerit, Integer maxouterit, GridBase* _sp_grid, 
-        LinearOperatorBase<FieldF>& _Linop_f, LinearOperatorBase<FieldD>& _Linop_d) : 
-      Linop_f(_Linop_f), Linop_d(_Linop_d), Tolerance(tol), InnerTolerance(tol), MaxInnerIterations(maxinnerit), 
-      MaxOuterIterations(maxouterit), SinglePrecGrid(_sp_grid), OuterLoopNormMult(100.), guesser(NULL) {};
-
-    void useGuesser(LinearFunction<FieldF>& g){
-      guesser = &g;
-    }
-  
-    void operator() (const FieldD& src_d_in, FieldD& sol_d)
-    {
-      TotalInnerIterations = 0;
-    
-      GridStopWatch TotalTimer;
-      TotalTimer.Start();
-      
-      int cb = src_d_in.Checkerboard();
-      sol_d.Checkerboard() = cb;
-      
-      RealD src_norm = norm2(src_d_in);
-      RealD stop = src_norm * Tolerance*Tolerance;
-
-      GridBase* DoublePrecGrid = src_d_in.Grid();
-      FieldD tmp_d(DoublePrecGrid);
-      tmp_d.Checkerboard() = cb;
-      
-      FieldD tmp2_d(DoublePrecGrid);
-      tmp2_d.Checkerboard() = cb;
-      
-      FieldD src_d(DoublePrecGrid);
-      src_d = src_d_in; //source for next inner iteration, computed from residual during operation
-      
-      RealD inner_tol = InnerTolerance;
-      
-      FieldF src_f(SinglePrecGrid);
-      src_f.Checkerboard() = cb;
-      
-      FieldF sol_f(SinglePrecGrid);
-      sol_f.Checkerboard() = cb;
-      
-      BiCGSTAB<FieldF> CG_f(inner_tol, MaxInnerIterations);
-      CG_f.ErrorOnNoConverge = false;
-
-      GridStopWatch InnerCGtimer;
-
-      GridStopWatch PrecChangeTimer;
-      
-      Integer &outer_iter = TotalOuterIterations; //so it will be equal to the final iteration count
-        
-      for(outer_iter = 0; outer_iter < MaxOuterIterations; outer_iter++)
-      {
-        // Compute double precision rsd and also new RHS vector.
-        Linop_d.Op(sol_d, tmp_d);
-        RealD norm = axpy_norm(src_d, -1., tmp_d, src_d_in); //src_d is residual vector
-        
-        std::cout << GridLogMessage << "MixedPrecisionBiCGSTAB: Outer iteration " << outer_iter << " residual " << norm << " target " << stop << std::endl;
-
-        if(norm < OuterLoopNormMult * stop){
-          std::cout << GridLogMessage << "MixedPrecisionBiCGSTAB: Outer iteration converged on iteration " << outer_iter << std::endl;
-          break;
-        }
-        while(norm * inner_tol * inner_tol < stop){ inner_tol *= 2; } // inner_tol = sqrt(stop/norm) ??
-
-        PrecChangeTimer.Start();
-        precisionChange(src_f, src_d);
-        PrecChangeTimer.Stop();
-        
-        sol_f = Zero();
-
-        //Optionally improve inner solver guess (eg using known eigenvectors)
-        if(guesser != NULL){ (*guesser)(src_f, sol_f); }
-
-        //Inner CG
-        CG_f.Tolerance = inner_tol;
-        InnerCGtimer.Start();
-        CG_f(Linop_f, src_f, sol_f);
-        InnerCGtimer.Stop();
-        TotalInnerIterations += CG_f.IterationsToComplete;
-        
-        //Convert sol back to double and add to double prec solution
-        PrecChangeTimer.Start();
-        precisionChange(tmp_d, sol_f);
-        PrecChangeTimer.Stop();
-        
-        axpy(sol_d, 1.0, tmp_d, sol_d);
-      }
-      
-      //Final trial CG
-      std::cout << GridLogMessage << "MixedPrecisionBiCGSTAB: Starting final patch-up double-precision solve" << std::endl;
-      
-      BiCGSTAB<FieldD> CG_d(Tolerance, MaxInnerIterations);
-      CG_d(Linop_d, src_d_in, sol_d);
-      TotalFinalStepIterations = CG_d.IterationsToComplete;
-
-      TotalTimer.Stop();
-      std::cout << GridLogMessage << "MixedPrecisionBiCGSTAB: Inner CG iterations " << TotalInnerIterations << " Restarts " << TotalOuterIterations << " Final CG iterations " << TotalFinalStepIterations << std::endl;
-      std::cout << GridLogMessage << "MixedPrecisionBiCGSTAB: Total time " << TotalTimer.Elapsed() << " Precision change " << PrecChangeTimer.Elapsed() << " Inner CG total " << InnerCGtimer.Elapsed() << std::endl;
-  }
-};
-
-NAMESPACE_END(Grid);
-
-#endif

Grid/algorithms/iterative/BlockConjugateGradient.h

@@ -27,11 +27,13 @@ See the full license in the file "LICENSE" in the top level distribution
 directory
 *************************************************************************************/
 /*  END LEGAL */
-#pragma once
+#ifndef GRID_BLOCK_CONJUGATE_GRADIENT_H
+#define GRID_BLOCK_CONJUGATE_GRADIENT_H
 
-NAMESPACE_BEGIN(Grid);
 
-enum BlockCGtype { BlockCG, BlockCGrQ, CGmultiRHS, BlockCGVec, BlockCGrQVec };
+namespace Grid {
+
+enum BlockCGtype { BlockCG, BlockCGrQ, CGmultiRHS };
 
 //////////////////////////////////////////////////////////////////////////
 // Block conjugate gradient. Dimension zero should be the block direction
@@ -40,6 +42,7 @@ template <class Field>
 class BlockConjugateGradient : public OperatorFunction<Field> {
  public:
 
+
   typedef typename Field::scalar_type scomplex;
 
   int blockDim ;
@@ -51,16 +54,21 @@ class BlockConjugateGradient : public OperatorFunction<Field> {
   RealD Tolerance;
   Integer MaxIterations;
   Integer IterationsToComplete; //Number of iterations the CG took to finish. Filled in upon completion
-  Integer PrintInterval; //GridLogMessages or Iterative
-  RealD TrueResidual;
   
   BlockConjugateGradient(BlockCGtype cgtype,int _Orthog,RealD tol, Integer maxit, bool err_on_no_conv = true)
-    : Tolerance(tol), CGtype(cgtype),   blockDim(_Orthog),  MaxIterations(maxit), ErrorOnNoConverge(err_on_no_conv),PrintInterval(100)
+    : Tolerance(tol), CGtype(cgtype),   blockDim(_Orthog),  MaxIterations(maxit), ErrorOnNoConverge(err_on_no_conv)
   {};
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Thin QR factorisation (google it)
 ////////////////////////////////////////////////////////////////////////////////////////////////////
+void ThinQRfact (Eigen::MatrixXcd &m_rr,
+		 Eigen::MatrixXcd &C,
+		 Eigen::MatrixXcd &Cinv,
+		 Field & Q,
+		 const Field & R)
+{
+  int Orthog = blockDim; // First dimension is block dim; this is an assumption
   ////////////////////////////////////////////////////////////////////////////////////////////////////
   //Dimensions
   // R_{ferm x Nblock} =  Q_{ferm x Nblock} x  C_{Nblock x Nblock} -> ferm x Nblock
@@ -77,20 +85,22 @@ class BlockConjugateGradient : public OperatorFunction<Field> {
   // Cdag C = Rdag R ; passes.
   // QdagQ  = 1      ; passes
   ////////////////////////////////////////////////////////////////////////////////////////////////////
-void ThinQRfact (Eigen::MatrixXcd &m_rr,
-		 Eigen::MatrixXcd &C,
-		 Eigen::MatrixXcd &Cinv,
-		 Field & Q,
-		 const Field & R)
-{
-  int Orthog = blockDim; // First dimension is block dim; this is an assumption
   sliceInnerProductMatrix(m_rr,R,R,Orthog);
 
   // Force manifest hermitian to avoid rounding related
   m_rr = 0.5*(m_rr+m_rr.adjoint());
 
-  Eigen::MatrixXcd L    = m_rr.llt().matrixL(); 
+#if 0
+  std::cout << " Calling Cholesky  ldlt on m_rr "  << m_rr <<std::endl;
+  Eigen::MatrixXcd L_ldlt = m_rr.ldlt().matrixL(); 
+  std::cout << " Called Cholesky  ldlt on m_rr "  << L_ldlt <<std::endl;
+  auto  D_ldlt = m_rr.ldlt().vectorD(); 
+  std::cout << " Called Cholesky  ldlt on m_rr "  << D_ldlt <<std::endl;
+#endif
 
+  //  std::cout << " Calling Cholesky  llt on m_rr "  <<std::endl;
+  Eigen::MatrixXcd L    = m_rr.llt().matrixL(); 
+  //  std::cout << " Called Cholesky  llt on m_rr "  << L <<std::endl;
   C    = L.adjoint();
   Cinv = C.inverse();
   ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -102,25 +112,6 @@ void ThinQRfact (Eigen::MatrixXcd &m_rr,
   ////////////////////////////////////////////////////////////////////////////////////////////////////
   sliceMulMatrix(Q,Cinv,R,Orthog);
 }
-// see comments above
-void ThinQRfact (Eigen::MatrixXcd &m_rr,
-		 Eigen::MatrixXcd &C,
-		 Eigen::MatrixXcd &Cinv,
-		 std::vector<Field> & Q,
-		 const std::vector<Field> & R)
-{
-  InnerProductMatrix(m_rr,R,R);
-
-  m_rr = 0.5*(m_rr+m_rr.adjoint());
-
-  Eigen::MatrixXcd L    = m_rr.llt().matrixL(); 
-
-  C    = L.adjoint();
-  Cinv = C.inverse();
-
-  MulMatrix(Q,Cinv,R);
-}
-
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Call one of several implementations
 ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -128,20 +119,14 @@ void operator()(LinearOperatorBase<Field> &Linop, const Field &Src, Field &Psi)
 {
   if ( CGtype == BlockCGrQ ) {
     BlockCGrQsolve(Linop,Src,Psi);
+  } else if (CGtype == BlockCG ) {
+    BlockCGsolve(Linop,Src,Psi);
   } else if (CGtype == CGmultiRHS ) {
     CGmultiRHSsolve(Linop,Src,Psi);
   } else {
     assert(0);
   }
 }
-virtual void operator()(LinearOperatorBase<Field> &Linop, const std::vector<Field> &Src, std::vector<Field> &Psi) 
-{
-  if ( CGtype == BlockCGrQVec ) {
-    BlockCGrQsolveVec(Linop,Src,Psi);
-  } else {
-    assert(0);
-  }
-}
 
 ////////////////////////////////////////////////////////////////////////////
 // BlockCGrQ implementation:
@@ -153,12 +138,11 @@ virtual void operator()(LinearOperatorBase<Field> &Linop, const std::vector<Fiel
 void BlockCGrQsolve(LinearOperatorBase<Field> &Linop, const Field &B, Field &X) 
 {
   int Orthog = blockDim; // First dimension is block dim; this is an assumption
-  Nblock = B.Grid()->_fdimensions[Orthog];
-/* FAKE */
-  Nblock=8;
+  Nblock = B._grid->_fdimensions[Orthog];
+
   std::cout<<GridLogMessage<<" Block Conjugate Gradient : Orthog "<<Orthog<<" Nblock "<<Nblock<<std::endl;
 
-  X.Checkerboard() = B.Checkerboard();
+  X.checkerboard = B.checkerboard;
   conformable(X, B);
 
   Field tmp(B);
@@ -218,10 +202,15 @@ void BlockCGrQsolve(LinearOperatorBase<Field> &Linop, const Field &B, Field &X)
   std::cout << GridLogMessage<<"BlockCGrQ algorithm initialisation " <<std::endl;
 
   //1.  QC = R = B-AX, D = Q     ; QC => Thin QR factorisation (google it)
+
   Linop.HermOp(X, AD);
   tmp = B - AD;  
-
+  //std::cout << GridLogMessage << " initial tmp " << norm2(tmp)<< std::endl;
   ThinQRfact (m_rr, m_C, m_Cinv, Q, tmp);
+  //std::cout << GridLogMessage << " initial Q " << norm2(Q)<< std::endl;
+  //std::cout << GridLogMessage << " m_rr " << m_rr<<std::endl;
+  //std::cout << GridLogMessage << " m_C " << m_C<<std::endl;
+  //std::cout << GridLogMessage << " m_Cinv " << m_Cinv<<std::endl;
   D=Q;
 
   std::cout << GridLogMessage<<"BlockCGrQ computed initial residual and QR fact " <<std::endl;
@@ -243,12 +232,14 @@ void BlockCGrQsolve(LinearOperatorBase<Field> &Linop, const Field &B, Field &X)
     MatrixTimer.Start();
     Linop.HermOp(D, Z);      
     MatrixTimer.Stop();
+    //std::cout << GridLogMessage << " norm2 Z " <<norm2(Z)<<std::endl;
 
     //4. M  = [D^dag Z]^{-1}
     sliceInnerTimer.Start();
     sliceInnerProductMatrix(m_DZ,D,Z,Orthog);
     sliceInnerTimer.Stop();
     m_M       = m_DZ.inverse();
+    //std::cout << GridLogMessage << " m_DZ " <<m_DZ<<std::endl;
     
     //5. X  = X + D MC
     m_tmp     = m_M * m_C;
@@ -266,7 +257,6 @@ void BlockCGrQsolve(LinearOperatorBase<Field> &Linop, const Field &B, Field &X)
     
     //7. D  = Q + D S^dag
     m_tmp = m_S.adjoint();
-
     sliceMaddTimer.Start();
     sliceMaddMatrix(D,m_tmp,D,Q,Orthog);
     sliceMaddTimer.Stop();
@@ -307,8 +297,7 @@ void BlockCGrQsolve(LinearOperatorBase<Field> &Linop, const Field &B, Field &X)
 
       Linop.HermOp(X, AD);
       AD = AD-B;
-      TrueResidual = std::sqrt(norm2(AD)/norm2(B));
-      std::cout << GridLogMessage <<"\tTrue residual is " << TrueResidual <<std::endl;
+      std::cout << GridLogMessage <<"\t True residual is " << std::sqrt(norm2(AD)/norm2(B)) <<std::endl;
 
       std::cout << GridLogMessage << "Time Breakdown "<<std::endl;
       std::cout << GridLogMessage << "\tElapsed    " << SolverTimer.Elapsed()     <<std::endl;
@@ -328,17 +317,163 @@ void BlockCGrQsolve(LinearOperatorBase<Field> &Linop, const Field &B, Field &X)
   IterationsToComplete = k;
 }
 //////////////////////////////////////////////////////////////////////////
+// Block conjugate gradient; Original O'Leary Dimension zero should be the block direction
+//////////////////////////////////////////////////////////////////////////
+void BlockCGsolve(LinearOperatorBase<Field> &Linop, const Field &Src, Field &Psi) 
+{
+  int Orthog = blockDim; // First dimension is block dim; this is an assumption
+  Nblock = Src._grid->_fdimensions[Orthog];
+
+  std::cout<<GridLogMessage<<" Block Conjugate Gradient : Orthog "<<Orthog<<" Nblock "<<Nblock<<std::endl;
+
+  Psi.checkerboard = Src.checkerboard;
+  conformable(Psi, Src);
+
+  Field P(Src);
+  Field AP(Src);
+  Field R(Src);
+  
+  Eigen::MatrixXcd m_pAp    = Eigen::MatrixXcd::Identity(Nblock,Nblock);
+  Eigen::MatrixXcd m_pAp_inv= Eigen::MatrixXcd::Identity(Nblock,Nblock);
+  Eigen::MatrixXcd m_rr     = Eigen::MatrixXcd::Zero(Nblock,Nblock);
+  Eigen::MatrixXcd m_rr_inv = Eigen::MatrixXcd::Zero(Nblock,Nblock);
+
+  Eigen::MatrixXcd m_alpha      = Eigen::MatrixXcd::Zero(Nblock,Nblock);
+  Eigen::MatrixXcd m_beta   = Eigen::MatrixXcd::Zero(Nblock,Nblock);
+
+  // Initial residual computation & set up
+  std::vector<RealD> residuals(Nblock);
+  std::vector<RealD> ssq(Nblock);
+
+  sliceNorm(ssq,Src,Orthog);
+  RealD sssum=0;
+  for(int b=0;b<Nblock;b++) sssum+=ssq[b];
+
+  sliceNorm(residuals,Src,Orthog);
+  for(int b=0;b<Nblock;b++){ assert(std::isnan(residuals[b])==0); }
+
+  sliceNorm(residuals,Psi,Orthog);
+  for(int b=0;b<Nblock;b++){ assert(std::isnan(residuals[b])==0); }
+
+  // Initial search dir is guess
+  Linop.HermOp(Psi, AP);
+  
+
+  /************************************************************************
+   * Block conjugate gradient (Stephen Pickles, thesis 1995, pp 71, O Leary 1980)
+   ************************************************************************
+   * O'Leary : R = B - A X
+   * O'Leary : P = M R ; preconditioner M = 1
+   * O'Leary : alpha = PAP^{-1} RMR
+   * O'Leary : beta  = RMR^{-1}_old RMR_new
+   * O'Leary : X=X+Palpha
+   * O'Leary : R_new=R_old-AP alpha
+   * O'Leary : P=MR_new+P beta
+   */
+
+  R = Src - AP;  
+  P = R;
+  sliceInnerProductMatrix(m_rr,R,R,Orthog);
+
+  GridStopWatch sliceInnerTimer;
+  GridStopWatch sliceMaddTimer;
+  GridStopWatch MatrixTimer;
+  GridStopWatch SolverTimer;
+  SolverTimer.Start();
+
+  int k;
+  for (k = 1; k <= MaxIterations; k++) {
+
+    RealD rrsum=0;
+    for(int b=0;b<Nblock;b++) rrsum+=real(m_rr(b,b));
+
+    std::cout << GridLogIterative << "\titeration "<<k<<" rr_sum "<<rrsum<<" ssq_sum "<< sssum
+	      <<" / "<<std::sqrt(rrsum/sssum) <<std::endl;
+
+    MatrixTimer.Start();
+    Linop.HermOp(P, AP);
+    MatrixTimer.Stop();
+
+    // Alpha
+    sliceInnerTimer.Start();
+    sliceInnerProductMatrix(m_pAp,P,AP,Orthog);
+    sliceInnerTimer.Stop();
+    m_pAp_inv = m_pAp.inverse();
+    m_alpha   = m_pAp_inv * m_rr ;
+
+    // Psi, R update
+    sliceMaddTimer.Start();
+    sliceMaddMatrix(Psi,m_alpha, P,Psi,Orthog);     // add alpha *  P to psi
+    sliceMaddMatrix(R  ,m_alpha,AP,  R,Orthog,-1.0);// sub alpha * AP to resid
+    sliceMaddTimer.Stop();
+
+    // Beta
+    m_rr_inv = m_rr.inverse();
+    sliceInnerTimer.Start();
+    sliceInnerProductMatrix(m_rr,R,R,Orthog);
+    sliceInnerTimer.Stop();
+    m_beta = m_rr_inv *m_rr;
+
+    // Search update
+    sliceMaddTimer.Start();
+    sliceMaddMatrix(AP,m_beta,P,R,Orthog);
+    sliceMaddTimer.Stop();
+    P= AP;
+
+    /*********************
+     * convergence monitor
+     *********************
+     */
+    RealD max_resid=0;
+    RealD rr;
+    for(int b=0;b<Nblock;b++){
+      rr = real(m_rr(b,b))/ssq[b];
+      if ( rr > max_resid ) max_resid = rr;
+    }
+    
+    if ( max_resid < Tolerance*Tolerance ) { 
+
+      SolverTimer.Stop();
+
+      std::cout << GridLogMessage<<"BlockCG converged in "<<k<<" iterations"<<std::endl;
+      for(int b=0;b<Nblock;b++){
+	std::cout << GridLogMessage<< "\t\tblock "<<b<<" computed resid "
+		  << std::sqrt(real(m_rr(b,b))/ssq[b])<<std::endl;
+      }
+      std::cout << GridLogMessage<<"\tMax residual is "<<std::sqrt(max_resid)<<std::endl;
+
+      Linop.HermOp(Psi, AP);
+      AP = AP-Src;
+      std::cout << GridLogMessage <<"\t True residual is " << std::sqrt(norm2(AP)/norm2(Src)) <<std::endl;
+
+      std::cout << GridLogMessage << "Time Breakdown "<<std::endl;
+      std::cout << GridLogMessage << "\tElapsed    " << SolverTimer.Elapsed()     <<std::endl;
+      std::cout << GridLogMessage << "\tMatrix     " << MatrixTimer.Elapsed()     <<std::endl;
+      std::cout << GridLogMessage << "\tInnerProd  " << sliceInnerTimer.Elapsed() <<std::endl;
+      std::cout << GridLogMessage << "\tMaddMatrix " << sliceMaddTimer.Elapsed()  <<std::endl;
+	    
+      IterationsToComplete = k;
+      return;
+    }
+
+  }
+  std::cout << GridLogMessage << "BlockConjugateGradient did NOT converge" << std::endl;
+
+  if (ErrorOnNoConverge) assert(0);
+  IterationsToComplete = k;
+}
+//////////////////////////////////////////////////////////////////////////
 // multiRHS conjugate gradient. Dimension zero should be the block direction
 // Use this for spread out across nodes
 //////////////////////////////////////////////////////////////////////////
 void CGmultiRHSsolve(LinearOperatorBase<Field> &Linop, const Field &Src, Field &Psi) 
 {
   int Orthog = blockDim; // First dimension is block dim
-  Nblock = Src.Grid()->_fdimensions[Orthog];
+  Nblock = Src._grid->_fdimensions[Orthog];
 
   std::cout<<GridLogMessage<<"MultiRHS Conjugate Gradient : Orthog "<<Orthog<<" Nblock "<<Nblock<<std::endl;
 
-  Psi.Checkerboard() = Src.Checkerboard();
+  Psi.checkerboard = Src.checkerboard;
   conformable(Psi, Src);
 
   Field P(Src);
@@ -444,8 +579,7 @@ void CGmultiRHSsolve(LinearOperatorBase<Field> &Linop, const Field &Src, Field &
 
       Linop.HermOp(Psi, AP);
       AP = AP-Src;
-      TrueResidual = std::sqrt(norm2(AP)/norm2(Src));
-      std::cout <<GridLogMessage << "\tTrue residual is " << TrueResidual <<std::endl;
+      std::cout <<GridLogMessage << "\tTrue residual is " << std::sqrt(norm2(AP)/norm2(Src)) <<std::endl;
 
       std::cout << GridLogMessage << "Time Breakdown "<<std::endl;
       std::cout << GridLogMessage << "\tElapsed    " << SolverTimer.Elapsed()     <<std::endl;
@@ -466,233 +600,7 @@ void CGmultiRHSsolve(LinearOperatorBase<Field> &Linop, const Field &Src, Field &
   IterationsToComplete = k;
 }
 
-void InnerProductMatrix(Eigen::MatrixXcd &m , const std::vector<Field> &X, const std::vector<Field> &Y){
-  for(int b=0;b<Nblock;b++){
-  for(int bp=0;bp<Nblock;bp++) {
-    m(b,bp) = innerProduct(X[b],Y[bp]);  
-  }}
-}
-void MaddMatrix(std::vector<Field> &AP, Eigen::MatrixXcd &m , const std::vector<Field> &X,const std::vector<Field> &Y,RealD scale=1.0){
-  // Should make this cache friendly with site outermost, parallel_for
-  // Deal with case AP aliases with either Y or X
-  std::vector<Field> tmp(Nblock,X[0]);
-  for(int b=0;b<Nblock;b++){
-    tmp[b]   = Y[b];
-    for(int bp=0;bp<Nblock;bp++) {
-      tmp[b] = tmp[b] + scomplex(scale*m(bp,b))*X[bp]; 
-    }
-  }
-  for(int b=0;b<Nblock;b++){
-    AP[b] = tmp[b];
-  }
-}
-void MulMatrix(std::vector<Field> &AP, Eigen::MatrixXcd &m , const std::vector<Field> &X){
-  // Should make this cache friendly with site outermost, parallel_for
-  for(int b=0;b<Nblock;b++){
-    AP[b] = Zero();
-    for(int bp=0;bp<Nblock;bp++) {
-      AP[b] += scomplex(m(bp,b))*X[bp]; 
-    }
-  }
-}
-double normv(const std::vector<Field> &P){
-  double nn = 0.0;
-  for(int b=0;b<Nblock;b++) {
-    nn+=norm2(P[b]);
-  }
-  return nn;
-}
-
-////////////////////////////////////////////////////////////////////////////
-// BlockCGrQvec implementation:
-//--------------------------
-// X is guess/Solution
-// B is RHS
-// Solve A X_i = B_i    ;        i refers to Nblock index
-////////////////////////////////////////////////////////////////////////////
-void BlockCGrQsolveVec(LinearOperatorBase<Field> &Linop, const std::vector<Field> &B, std::vector<Field> &X) 
-{
-  Nblock = B.size();
-  assert(Nblock == X.size());
-
-  std::cout<<GridLogMessage<<" Block Conjugate Gradient Vec rQ : Nblock "<<Nblock<<std::endl;
-
-  for(int b=0;b<Nblock;b++){ 
-    X[b].Checkerboard() = B[b].Checkerboard();
-    conformable(X[b], B[b]);
-    conformable(X[b], X[0]); 
-  }
-
-  Field Fake(B[0]);
-
-  std::vector<Field> tmp(Nblock,Fake);
-  std::vector<Field>   Q(Nblock,Fake);
-  std::vector<Field>   D(Nblock,Fake);
-  std::vector<Field>   Z(Nblock,Fake);
-  std::vector<Field>  AD(Nblock,Fake);
-
-  Eigen::MatrixXcd m_DZ     = Eigen::MatrixXcd::Identity(Nblock,Nblock);
-  Eigen::MatrixXcd m_M      = Eigen::MatrixXcd::Identity(Nblock,Nblock);
-  Eigen::MatrixXcd m_rr     = Eigen::MatrixXcd::Zero(Nblock,Nblock);
-
-  Eigen::MatrixXcd m_C      = Eigen::MatrixXcd::Zero(Nblock,Nblock);
-  Eigen::MatrixXcd m_Cinv   = Eigen::MatrixXcd::Zero(Nblock,Nblock);
-  Eigen::MatrixXcd m_S      = Eigen::MatrixXcd::Zero(Nblock,Nblock);
-  Eigen::MatrixXcd m_Sinv   = Eigen::MatrixXcd::Zero(Nblock,Nblock);
-
-  Eigen::MatrixXcd m_tmp    = Eigen::MatrixXcd::Identity(Nblock,Nblock);
-  Eigen::MatrixXcd m_tmp1   = Eigen::MatrixXcd::Identity(Nblock,Nblock);
-
-  // Initial residual computation & set up
-  std::vector<RealD> residuals(Nblock);
-  std::vector<RealD> ssq(Nblock);
-
-  RealD sssum=0;
-  for(int b=0;b<Nblock;b++){ ssq[b] = norm2(B[b]);}
-  for(int b=0;b<Nblock;b++) sssum+=ssq[b];
-
-  for(int b=0;b<Nblock;b++){ residuals[b] = norm2(B[b]);}
-  for(int b=0;b<Nblock;b++){ assert(std::isnan(residuals[b])==0); }
-
-  for(int b=0;b<Nblock;b++){ residuals[b] = norm2(X[b]);}
-  for(int b=0;b<Nblock;b++){ assert(std::isnan(residuals[b])==0); }
-
-  /************************************************************************
-   * Block conjugate gradient rQ (Sebastien Birk Thesis, after Dubrulle 2001)
-   ************************************************************************
-   * Dimensions:
-   *
-   *   X,B==(Nferm x Nblock)
-   *   A==(Nferm x Nferm)
-   *  
-   * Nferm = Nspin x Ncolour x Ncomplex x Nlattice_site
-   * 
-   * QC = R = B-AX, D = Q     ; QC => Thin QR factorisation (google it)
-   * for k: 
-   *   Z  = AD
-   *   M  = [D^dag Z]^{-1}
-   *   X  = X + D MC
-   *   QS = Q - ZM
-   *   D  = Q + D S^dag
-   *   C  = S C
-   */
-  ///////////////////////////////////////
-  // Initial block: initial search dir is guess
-  ///////////////////////////////////////
-  std::cout << GridLogMessage<<"BlockCGrQvec algorithm initialisation " <<std::endl;
-
-  //1.  QC = R = B-AX, D = Q     ; QC => Thin QR factorisation (google it)
-  for(int b=0;b<Nblock;b++) {
-    Linop.HermOp(X[b], AD[b]);
-    tmp[b] = B[b] - AD[b];  
-  }
-
-  ThinQRfact (m_rr, m_C, m_Cinv, Q, tmp);
-
-  for(int b=0;b<Nblock;b++) D[b]=Q[b];
-
-  std::cout << GridLogMessage<<"BlockCGrQ vec computed initial residual and QR fact " <<std::endl;
-
-  ///////////////////////////////////////
-  // Timers
-  ///////////////////////////////////////
-  GridStopWatch sliceInnerTimer;
-  GridStopWatch sliceMaddTimer;
-  GridStopWatch QRTimer;
-  GridStopWatch MatrixTimer;
-  GridStopWatch SolverTimer;
-  SolverTimer.Start();
-
-  int k;
-  for (k = 1; k <= MaxIterations; k++) {
-
-    //3. Z  = AD
-    MatrixTimer.Start();
-    for(int b=0;b<Nblock;b++) Linop.HermOp(D[b], Z[b]);      
-    MatrixTimer.Stop();
-
-    //4. M  = [D^dag Z]^{-1}
-    sliceInnerTimer.Start();
-    InnerProductMatrix(m_DZ,D,Z);
-    sliceInnerTimer.Stop();
-    m_M       = m_DZ.inverse();
-    
-    //5. X  = X + D MC
-    m_tmp     = m_M * m_C;
-    sliceMaddTimer.Start();
-    MaddMatrix(X,m_tmp, D,X);     
-    sliceMaddTimer.Stop();
-
-    //6. QS = Q - ZM
-    sliceMaddTimer.Start();
-    MaddMatrix(tmp,m_M,Z,Q,-1.0);
-    sliceMaddTimer.Stop();
-    QRTimer.Start();
-    ThinQRfact (m_rr, m_S, m_Sinv, Q, tmp);
-    QRTimer.Stop();
-    
-    //7. D  = Q + D S^dag
-    m_tmp = m_S.adjoint();
-    sliceMaddTimer.Start();
-    MaddMatrix(D,m_tmp,D,Q);
-    sliceMaddTimer.Stop();
-
-    //8. C  = S C
-    m_C = m_S*m_C;
-    
-    /*********************
-     * convergence monitor
-     *********************
-     */
-    m_rr = m_C.adjoint() * m_C;
-
-    RealD max_resid=0;
-    RealD rrsum=0;
-    RealD rr;
-
-    for(int b=0;b<Nblock;b++) {
-      rrsum+=real(m_rr(b,b));
-      rr = real(m_rr(b,b))/ssq[b];
-      if ( rr > max_resid ) max_resid = rr;
-    }
-
-    std::cout << GridLogIterative << "\t Block Iteration "<<k<<" ave resid "<< std::sqrt(rrsum/sssum) << " max "<< std::sqrt(max_resid) <<std::endl;
-
-    if ( max_resid < Tolerance*Tolerance ) { 
-
-      SolverTimer.Stop();
-
-      std::cout << GridLogMessage<<"BlockCGrQ converged in "<<k<<" iterations"<<std::endl;
-
-      for(int b=0;b<Nblock;b++){
-	std::cout << GridLogMessage<< "\t\tblock "<<b<<" computed resid "<< std::sqrt(real(m_rr(b,b))/ssq[b])<<std::endl;
-      }
-      std::cout << GridLogMessage<<"\tMax residual is "<<std::sqrt(max_resid)<<std::endl;
-
-      for(int b=0;b<Nblock;b++) Linop.HermOp(X[b], AD[b]);
-      for(int b=0;b<Nblock;b++) AD[b] = AD[b]-B[b];
-      TrueResidual = std::sqrt(normv(AD)/normv(B));
-      std::cout << GridLogMessage << "\tTrue residual is " << TrueResidual <<std::endl;
-
-      std::cout << GridLogMessage << "Time Breakdown "<<std::endl;
-      std::cout << GridLogMessage << "\tElapsed    " << SolverTimer.Elapsed()     <<std::endl;
-      std::cout << GridLogMessage << "\tMatrix     " << MatrixTimer.Elapsed()     <<std::endl;
-      std::cout << GridLogMessage << "\tInnerProd  " << sliceInnerTimer.Elapsed() <<std::endl;
-      std::cout << GridLogMessage << "\tMaddMatrix " << sliceMaddTimer.Elapsed()  <<std::endl;
-      std::cout << GridLogMessage << "\tThinQRfact " << QRTimer.Elapsed()  <<std::endl;
-	    
-      IterationsToComplete = k;
-      return;
-    }
-
-  }
-  std::cout << GridLogMessage << "BlockConjugateGradient(rQ) did NOT converge" << std::endl;
-
-  if (ErrorOnNoConverge) assert(0);
-  IterationsToComplete = k;
-}
-
 };
 
-NAMESPACE_END(Grid);
-
+}
+#endif

Grid/algorithms/iterative/CommunicationAvoidingGeneralisedMinimalResidual.h

@@ -1,248 +0,0 @@
-/*************************************************************************************
-
-Grid physics library, www.github.com/paboyle/Grid
-
-Source file: ./lib/algorithms/iterative/CommunicationAvoidingGeneralisedMinimalResidual.h
-
-Copyright (C) 2015
-
-Author: Daniel Richtmann <daniel.richtmann@ur.de>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-See the full license in the file "LICENSE" in the top level distribution
-directory
-*************************************************************************************/
-/*  END LEGAL */
-#ifndef GRID_COMMUNICATION_AVOIDING_GENERALISED_MINIMAL_RESIDUAL_H
-#define GRID_COMMUNICATION_AVOIDING_GENERALISED_MINIMAL_RESIDUAL_H
-
-namespace Grid {
-
-template<class Field>
-class CommunicationAvoidingGeneralisedMinimalResidual : public OperatorFunction<Field> {
- public:
-  using OperatorFunction<Field>::operator();
-
-  bool ErrorOnNoConverge; // Throw an assert when CAGMRES fails to converge,
-                          // defaults to true
-
-  RealD   Tolerance;
-
-  Integer MaxIterations;
-  Integer RestartLength;
-  Integer MaxNumberOfRestarts;
-  Integer IterationCount; // Number of iterations the CAGMRES took to finish,
-                          // filled in upon completion
-
-  GridStopWatch MatrixTimer;
-  GridStopWatch LinalgTimer;
-  GridStopWatch QrTimer;
-  GridStopWatch CompSolutionTimer;
-
-  Eigen::MatrixXcd H;
-
-  std::vector<ComplexD> y;
-  std::vector<ComplexD> gamma;
-  std::vector<ComplexD> c;
-  std::vector<ComplexD> s;
-
-  CommunicationAvoidingGeneralisedMinimalResidual(RealD   tol,
-                                                  Integer maxit,
-                                                  Integer restart_length,
-                                                  bool    err_on_no_conv = true)
-      : Tolerance(tol)
-      , MaxIterations(maxit)
-      , RestartLength(restart_length)
-      , MaxNumberOfRestarts(MaxIterations/RestartLength + ((MaxIterations%RestartLength == 0) ? 0 : 1))
-      , ErrorOnNoConverge(err_on_no_conv)
-      , H(Eigen::MatrixXcd::Zero(RestartLength, RestartLength + 1)) // sizes taken from DD-αAMG code base
-      , y(RestartLength + 1, 0.)
-      , gamma(RestartLength + 1, 0.)
-      , c(RestartLength + 1, 0.)
-      , s(RestartLength + 1, 0.) {};
-
-  void operator()(LinearOperatorBase<Field> &LinOp, const Field &src, Field &psi) {
-
-    std::cout << GridLogWarning << "This algorithm currently doesn't differ from regular GMRES" << std::endl;
-
-    psi.Checkerboard() = src.Checkerboard();
-    conformable(psi, src);
-
-    RealD guess = norm2(psi);
-    assert(std::isnan(guess) == 0);
-
-    RealD cp;
-    RealD ssq = norm2(src);
-    RealD rsq = Tolerance * Tolerance * ssq;
-
-    Field r(src.Grid());
-
-    std::cout << std::setprecision(4) << std::scientific;
-    std::cout << GridLogIterative << "CommunicationAvoidingGeneralisedMinimalResidual: guess " << guess << std::endl;
-    std::cout << GridLogIterative << "CommunicationAvoidingGeneralisedMinimalResidual:   src " << ssq   << std::endl;
-
-    MatrixTimer.Reset();
-    LinalgTimer.Reset();
-    QrTimer.Reset();
-    CompSolutionTimer.Reset();
-
-    GridStopWatch SolverTimer;
-    SolverTimer.Start();
-
-    IterationCount = 0;
-
-    for (int k=0; k<MaxNumberOfRestarts; k++) {
-
-      cp = outerLoopBody(LinOp, src, psi, rsq);
-
-      // Stopping condition
-      if (cp <= rsq) {
-
-        SolverTimer.Stop();
-
-        LinOp.Op(psi,r);
-        axpy(r,-1.0,src,r);
-
-        RealD srcnorm       = sqrt(ssq);
-        RealD resnorm       = sqrt(norm2(r));
-        RealD true_residual = resnorm / srcnorm;
-
-        std::cout << GridLogMessage        << "CommunicationAvoidingGeneralisedMinimalResidual: Converged on iteration " << IterationCount
-                  << " computed residual " << sqrt(cp / ssq)
-                  << " true residual "     << true_residual
-                  << " target "            << Tolerance << std::endl;
-
-        std::cout << GridLogMessage << "CAGMRES Time elapsed: Total   " <<       SolverTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "CAGMRES Time elapsed: Matrix  " <<       MatrixTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "CAGMRES Time elapsed: Linalg  " <<       LinalgTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "CAGMRES Time elapsed: QR      " <<           QrTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "CAGMRES Time elapsed: CompSol " << CompSolutionTimer.Elapsed() << std::endl;
-        return;
-      }
-    }
-
-    std::cout << GridLogMessage << "CommunicationAvoidingGeneralisedMinimalResidual did NOT converge" << std::endl;
-
-    if (ErrorOnNoConverge)
-      assert(0);
-  }
-
-  RealD outerLoopBody(LinearOperatorBase<Field> &LinOp, const Field &src, Field &psi, RealD rsq) {
-
-    RealD cp = 0;
-
-    Field w(src.Grid());
-    Field r(src.Grid());
-
-    // this should probably be made a class member so that it is only allocated once, not in every restart
-    std::vector<Field> v(RestartLength + 1, src.Grid()); for (auto &elem : v) elem = Zero();
-
-    MatrixTimer.Start();
-    LinOp.Op(psi, w);
-    MatrixTimer.Stop();
-
-    LinalgTimer.Start();
-    r = src - w;
-
-    gamma[0] = sqrt(norm2(r));
-
-    ComplexD scale = 1.0/gamma[0];
-    v[0] = scale * r;
-
-    LinalgTimer.Stop();
-
-    for (int i=0; i<RestartLength; i++) {
-
-      IterationCount++;
-
-      arnoldiStep(LinOp, v, w, i);
-
-      qrUpdate(i);
-
-      cp = norm(gamma[i+1]);
-
-      std::cout << GridLogIterative << "CommunicationAvoidingGeneralisedMinimalResidual: Iteration " << IterationCount
-                << " residual " << cp << " target " << rsq << std::endl;
-
-      if ((i == RestartLength - 1) || (IterationCount == MaxIterations) || (cp <= rsq)) {
-
-        computeSolution(v, psi, i);
-
-        return cp;
-      }
-    }
-
-    assert(0); // Never reached
-    return cp;
-  }
-
-  void arnoldiStep(LinearOperatorBase<Field> &LinOp, std::vector<Field> &v, Field &w, int iter) {
-
-    MatrixTimer.Start();
-    LinOp.Op(v[iter], w);
-    MatrixTimer.Stop();
-
-    LinalgTimer.Start();
-    for (int i = 0; i <= iter; ++i) {
-      H(iter, i) = innerProduct(v[i], w);
-      w = w - ComplexD(H(iter, i)) * v[i];
-    }
-
-    H(iter, iter + 1) = sqrt(norm2(w));
-    v[iter + 1] = ComplexD(1. / H(iter, iter + 1)) * w;
-    LinalgTimer.Stop();
-  }
-
-  void qrUpdate(int iter) {
-
-    QrTimer.Start();
-    for (int i = 0; i < iter ; ++i) {
-      auto tmp       = -s[i] * ComplexD(H(iter, i)) + c[i] * ComplexD(H(iter, i + 1));
-      H(iter, i)     = conjugate(c[i]) * ComplexD(H(iter, i)) + conjugate(s[i]) * ComplexD(H(iter, i + 1));
-      H(iter, i + 1) = tmp;
-    }
-
-    // Compute new Givens Rotation
-    auto nu     = sqrt(std::norm(H(iter, iter)) + std::norm(H(iter, iter + 1)));
-    c[iter]     = H(iter, iter) / nu;
-    s[iter]     = H(iter, iter + 1) / nu;
-
-    // Apply new Givens rotation
-    H(iter, iter)     = nu;
-    H(iter, iter + 1) = 0.;
-
-    gamma[iter + 1] = -s[iter] * gamma[iter];
-    gamma[iter]     = conjugate(c[iter]) * gamma[iter];
-    QrTimer.Stop();
-  }
-
-  void computeSolution(std::vector<Field> const &v, Field &psi, int iter) {
-
-    CompSolutionTimer.Start();
-    for (int i = iter; i >= 0; i--) {
-      y[i] = gamma[i];
-      for (int k = i + 1; k <= iter; k++)
-        y[i] = y[i] - ComplexD(H(k, i)) * y[k];
-      y[i] = y[i] / ComplexD(H(i, i));
-    }
-
-    for (int i = 0; i <= iter; i++)
-      psi = psi + v[i] * y[i];
-    CompSolutionTimer.Stop();
-  }
-};
-}
-#endif

Grid/algorithms/iterative/ConjugateGradient.h

@@ -27,11 +27,11 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 See the full license in the file "LICENSE" in the top level distribution
 directory
 *************************************************************************************/
-			   /*  END LEGAL */
+/*  END LEGAL */
 #ifndef GRID_CONJUGATE_GRADIENT_H
 #define GRID_CONJUGATE_GRADIENT_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 /////////////////////////////////////////////////////////////
 // Base classes for iterative processes based on operators
@@ -40,30 +40,25 @@ NAMESPACE_BEGIN(Grid);
 
 template <class Field>
 class ConjugateGradient : public OperatorFunction<Field> {
-public:
-
-  using OperatorFunction<Field>::operator();
-
+ public:
   bool ErrorOnNoConverge;  // throw an assert when the CG fails to converge.
                            // Defaults true.
   RealD Tolerance;
   Integer MaxIterations;
   Integer IterationsToComplete; //Number of iterations the CG took to finish. Filled in upon completion
-  RealD TrueResidual;
   
   ConjugateGradient(RealD tol, Integer maxit, bool err_on_no_conv = true)
-    : Tolerance(tol),
-      MaxIterations(maxit),
-      ErrorOnNoConverge(err_on_no_conv){};
+      : Tolerance(tol),
+        MaxIterations(maxit),
+        ErrorOnNoConverge(err_on_no_conv){};
 
   void operator()(LinearOperatorBase<Field> &Linop, const Field &src, Field &psi) {
 
-    psi.Checkerboard() = src.Checkerboard();
 
+    psi.checkerboard = src.checkerboard;
     conformable(psi, src);
 
-    RealD cp, c, a, d, b, ssq, qq;
-    //RealD b_pred;
+    RealD cp, c, a, d, b, ssq, qq, b_pred;
 
     Field p(src);
     Field mmp(src);
@@ -72,9 +67,10 @@ public:
     // Initial residual computation & set up
     RealD guess = norm2(psi);
     assert(std::isnan(guess) == 0);
+
     
     Linop.HermOpAndNorm(psi, mmp, d, b);
-    
+
     r = src - mmp;
     p = r;
 
@@ -82,14 +78,6 @@ public:
     cp = a;
     ssq = norm2(src);
 
-    // Handle trivial case of zero src
-    if (ssq == 0.){
-      psi = Zero();
-      IterationsToComplete = 1;
-      TrueResidual = 0.;
-      return;
-    }
-
     std::cout << GridLogIterative << std::setprecision(8) << "ConjugateGradient: guess " << guess << std::endl;
     std::cout << GridLogIterative << std::setprecision(8) << "ConjugateGradient:   src " << ssq << std::endl;
     std::cout << GridLogIterative << std::setprecision(8) << "ConjugateGradient:    mp " << d << std::endl;
@@ -101,9 +89,6 @@ public:
 
     // Check if guess is really REALLY good :)
     if (cp <= rsq) {
-      TrueResidual = std::sqrt(a/ssq);
-      std::cout << GridLogMessage << "ConjugateGradient guess is converged already " << std::endl;
-      IterationsToComplete = 0;	
       return;
     }
 
@@ -119,7 +104,7 @@ public:
 
     SolverTimer.Start();
     int k;
-    for (k = 1; k <= MaxIterations; k++) {
+    for (k = 1; k <= MaxIterations*1000; k++) {
       c = cp;
 
       MatrixTimer.Start();
@@ -140,18 +125,15 @@ public:
       b = cp / c;
 
       LinearCombTimer.Start();
-      auto psi_v = psi.View();
-      auto p_v   = p.View();
-      auto r_v   = r.View();
-      accelerator_for(ss,p_v.size(), Field::vector_object::Nsimd(),{
-	  coalescedWrite(psi_v[ss], a      *  p_v(ss) + psi_v(ss));
-	  coalescedWrite(p_v[ss]  , b      *  p_v(ss) + r_v  (ss));
-      });
+      parallel_for(int ss=0;ss<src._grid->oSites();ss++){
+	vstream(psi[ss], a      *  p[ss] + psi[ss]);
+	vstream(p  [ss], b      *  p[ss] + r[ss]);
+      }
       LinearCombTimer.Stop();
       LinalgTimer.Stop();
 
       std::cout << GridLogIterative << "ConjugateGradient: Iteration " << k
-                << " residual " << sqrt(cp/ssq) << " target " << Tolerance << std::endl;
+                << " residual " << cp << " target " << rsq << std::endl;
 
       // Stopping condition
       if (cp <= rsq) {
@@ -159,43 +141,37 @@ public:
         Linop.HermOpAndNorm(psi, mmp, d, qq);
         p = mmp - src;
 
-        RealD srcnorm = std::sqrt(norm2(src));
-        RealD resnorm = std::sqrt(norm2(p));
+        RealD srcnorm = sqrt(norm2(src));
+        RealD resnorm = sqrt(norm2(p));
         RealD true_residual = resnorm / srcnorm;
 
-        std::cout << GridLogMessage << "ConjugateGradient Converged on iteration " << k 
-		  << "\tComputed residual " << std::sqrt(cp / ssq)
-		  << "\tTrue residual " << true_residual
-		  << "\tTarget " << Tolerance << std::endl;
+        std::cout << GridLogMessage << "ConjugateGradient Converged on iteration " << k << std::endl;
+        std::cout << GridLogMessage << "\tComputed residual " << sqrt(cp / ssq)<<std::endl;
+	std::cout << GridLogMessage << "\tTrue residual " << true_residual<<std::endl;
+	std::cout << GridLogMessage << "\tTarget " << Tolerance << std::endl;
 
-        std::cout << GridLogIterative << "Time breakdown "<<std::endl;
-	std::cout << GridLogIterative << "\tElapsed    " << SolverTimer.Elapsed() <<std::endl;
-	std::cout << GridLogIterative << "\tMatrix     " << MatrixTimer.Elapsed() <<std::endl;
-	std::cout << GridLogIterative << "\tLinalg     " << LinalgTimer.Elapsed() <<std::endl;
-	std::cout << GridLogIterative << "\tInner      " << InnerTimer.Elapsed() <<std::endl;
-	std::cout << GridLogIterative << "\tAxpyNorm   " << AxpyNormTimer.Elapsed() <<std::endl;
-	std::cout << GridLogIterative << "\tLinearComb " << LinearCombTimer.Elapsed() <<std::endl;
+        std::cout << GridLogMessage << "Time breakdown "<<std::endl;
+	std::cout << GridLogMessage << "\tElapsed    " << SolverTimer.Elapsed() <<std::endl;
+	std::cout << GridLogMessage << "\tMatrix     " << MatrixTimer.Elapsed() <<std::endl;
+	std::cout << GridLogMessage << "\tLinalg     " << LinalgTimer.Elapsed() <<std::endl;
+	std::cout << GridLogMessage << "\tInner      " << InnerTimer.Elapsed() <<std::endl;
+	std::cout << GridLogMessage << "\tAxpyNorm   " << AxpyNormTimer.Elapsed() <<std::endl;
+	std::cout << GridLogMessage << "\tLinearComb " << LinearCombTimer.Elapsed() <<std::endl;
 
         if (ErrorOnNoConverge) assert(true_residual / Tolerance < 10000.0);
 
 	IterationsToComplete = k;	
-	TrueResidual = true_residual;
 
         return;
       }
     }
-    // Failed. Calculate true residual before giving up                                                         
-    Linop.HermOpAndNorm(psi, mmp, d, qq);
-    p = mmp - src;
-
-    TrueResidual = sqrt(norm2(p)/ssq);
-
-    std::cout << GridLogMessage << "ConjugateGradient did NOT converge "<<k<<" / "<< MaxIterations<< std::endl;
+    std::cout << GridLogMessage << "ConjugateGradient did NOT converge"
+              << std::endl;
 
     if (ErrorOnNoConverge) assert(0);
     IterationsToComplete = k;
 
   }
 };
-NAMESPACE_END(Grid);
+}
 #endif

Grid/algorithms/iterative/ConjugateGradientMixedPrec.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,17 +23,15 @@ Author: Christopher Kelly <ckelly@phys.columbia.edu>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_CONJUGATE_GRADIENT_MIXED_PREC_H
 #define GRID_CONJUGATE_GRADIENT_MIXED_PREC_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
   //Mixed precision restarted defect correction CG
-  template<class FieldD,class FieldF, 
-    typename std::enable_if< getPrecision<FieldD>::value == 2, int>::type = 0,
-    typename std::enable_if< getPrecision<FieldF>::value == 1, int>::type = 0> 
+  template<class FieldD,class FieldF, typename std::enable_if< getPrecision<FieldD>::value == 2, int>::type = 0,typename std::enable_if< getPrecision<FieldF>::value == 1, int>::type = 0> 
   class MixedPrecisionConjugateGradient : public LinearFunction<FieldD> {
   public:                                                
     RealD   Tolerance;
@@ -52,12 +50,7 @@ NAMESPACE_BEGIN(Grid);
     //Option to speed up *inner single precision* solves using a LinearFunction that produces a guess
     LinearFunction<FieldF> *guesser;
     
-    MixedPrecisionConjugateGradient(RealD tol, 
-				    Integer maxinnerit, 
-				    Integer maxouterit, 
-				    GridBase* _sp_grid, 
-				    LinearOperatorBase<FieldF> &_Linop_f, 
-				    LinearOperatorBase<FieldD> &_Linop_d) :
+    MixedPrecisionConjugateGradient(RealD tol, Integer maxinnerit, Integer maxouterit, GridBase* _sp_grid, LinearOperatorBase<FieldF> &_Linop_f, LinearOperatorBase<FieldD> &_Linop_d) :
       Linop_f(_Linop_f), Linop_d(_Linop_d),
       Tolerance(tol), InnerTolerance(tol), MaxInnerIterations(maxinnerit), MaxOuterIterations(maxouterit), SinglePrecGrid(_sp_grid),
       OuterLoopNormMult(100.), guesser(NULL){ };
@@ -66,96 +59,96 @@ NAMESPACE_BEGIN(Grid);
       guesser = &g;
     }
   
-  void operator() (const FieldD &src_d_in, FieldD &sol_d){
-    TotalInnerIterations = 0;
+    void operator() (const FieldD &src_d_in, FieldD &sol_d){
+      TotalInnerIterations = 0;
 	
-    GridStopWatch TotalTimer;
-    TotalTimer.Start();
+      GridStopWatch TotalTimer;
+      TotalTimer.Start();
     
-    int cb = src_d_in.Checkerboard();
-    sol_d.Checkerboard() = cb;
+      int cb = src_d_in.checkerboard;
+      sol_d.checkerboard = cb;
     
-    RealD src_norm = norm2(src_d_in);
-    RealD stop = src_norm * Tolerance*Tolerance;
+      RealD src_norm = norm2(src_d_in);
+      RealD stop = src_norm * Tolerance*Tolerance;
 
-    GridBase* DoublePrecGrid = src_d_in.Grid();
-    FieldD tmp_d(DoublePrecGrid);
-    tmp_d.Checkerboard() = cb;
+      GridBase* DoublePrecGrid = src_d_in._grid;
+      FieldD tmp_d(DoublePrecGrid);
+      tmp_d.checkerboard = cb;
     
-    FieldD tmp2_d(DoublePrecGrid);
-    tmp2_d.Checkerboard() = cb;
+      FieldD tmp2_d(DoublePrecGrid);
+      tmp2_d.checkerboard = cb;
     
-    FieldD src_d(DoublePrecGrid);
-    src_d = src_d_in; //source for next inner iteration, computed from residual during operation
+      FieldD src_d(DoublePrecGrid);
+      src_d = src_d_in; //source for next inner iteration, computed from residual during operation
     
-    RealD inner_tol = InnerTolerance;
+      RealD inner_tol = InnerTolerance;
     
-    FieldF src_f(SinglePrecGrid);
-    src_f.Checkerboard() = cb;
+      FieldF src_f(SinglePrecGrid);
+      src_f.checkerboard = cb;
     
-    FieldF sol_f(SinglePrecGrid);
-    sol_f.Checkerboard() = cb;
+      FieldF sol_f(SinglePrecGrid);
+      sol_f.checkerboard = cb;
     
-    ConjugateGradient<FieldF> CG_f(inner_tol, MaxInnerIterations);
-    CG_f.ErrorOnNoConverge = false;
+      ConjugateGradient<FieldF> CG_f(inner_tol, MaxInnerIterations);
+      CG_f.ErrorOnNoConverge = false;
 
-    GridStopWatch InnerCGtimer;
+      GridStopWatch InnerCGtimer;
 
-    GridStopWatch PrecChangeTimer;
+      GridStopWatch PrecChangeTimer;
     
-    Integer &outer_iter = TotalOuterIterations; //so it will be equal to the final iteration count
+      Integer &outer_iter = TotalOuterIterations; //so it will be equal to the final iteration count
       
-    for(outer_iter = 0; outer_iter < MaxOuterIterations; outer_iter++){
-      //Compute double precision rsd and also new RHS vector.
-      Linop_d.HermOp(sol_d, tmp_d);
-      RealD norm = axpy_norm(src_d, -1., tmp_d, src_d_in); //src_d is residual vector
+      for(outer_iter = 0; outer_iter < MaxOuterIterations; outer_iter++){
+	//Compute double precision rsd and also new RHS vector.
+	Linop_d.HermOp(sol_d, tmp_d);
+	RealD norm = axpy_norm(src_d, -1., tmp_d, src_d_in); //src_d is residual vector
       
-      std::cout<<GridLogMessage<<"MixedPrecisionConjugateGradient: Outer iteration " <<outer_iter<<" residual "<< norm<< " target "<< stop<<std::endl;
+	std::cout<<GridLogMessage<<"MixedPrecisionConjugateGradient: Outer iteration " <<outer_iter<<" residual "<< norm<< " target "<< stop<<std::endl;
 
-      if(norm < OuterLoopNormMult * stop){
-	std::cout<<GridLogMessage<<"MixedPrecisionConjugateGradient: Outer iteration converged on iteration " <<outer_iter <<std::endl;
-	break;
+	if(norm < OuterLoopNormMult * stop){
+	  std::cout<<GridLogMessage<<"MixedPrecisionConjugateGradient: Outer iteration converged on iteration " <<outer_iter <<std::endl;
+	  break;
+	}
+	while(norm * inner_tol * inner_tol < stop) inner_tol *= 2;  // inner_tol = sqrt(stop/norm) ??
+
+	PrecChangeTimer.Start();
+	precisionChange(src_f, src_d);
+	PrecChangeTimer.Stop();
+      
+	zeroit(sol_f);
+
+	//Optionally improve inner solver guess (eg using known eigenvectors)
+	if(guesser != NULL)
+	  (*guesser)(src_f, sol_f);
+
+	//Inner CG
+	CG_f.Tolerance = inner_tol;
+	InnerCGtimer.Start();
+	CG_f(Linop_f, src_f, sol_f);
+	InnerCGtimer.Stop();
+	TotalInnerIterations += CG_f.IterationsToComplete;
+      
+	//Convert sol back to double and add to double prec solution
+	PrecChangeTimer.Start();
+	precisionChange(tmp_d, sol_f);
+	PrecChangeTimer.Stop();
+      
+	axpy(sol_d, 1.0, tmp_d, sol_d);
       }
-      while(norm * inner_tol * inner_tol < stop) inner_tol *= 2;  // inner_tol = sqrt(stop/norm) ??
+    
+      //Final trial CG
+      std::cout<<GridLogMessage<<"MixedPrecisionConjugateGradient: Starting final patch-up double-precision solve"<<std::endl;
+    
+      ConjugateGradient<FieldD> CG_d(Tolerance, MaxInnerIterations);
+      CG_d(Linop_d, src_d_in, sol_d);
+      TotalFinalStepIterations = CG_d.IterationsToComplete;
 
-      PrecChangeTimer.Start();
-      precisionChange(src_f, src_d);
-      PrecChangeTimer.Stop();
-      
-      sol_f = Zero();
-
-      //Optionally improve inner solver guess (eg using known eigenvectors)
-      if(guesser != NULL)
-	(*guesser)(src_f, sol_f);
-
-      //Inner CG
-      CG_f.Tolerance = inner_tol;
-      InnerCGtimer.Start();
-      CG_f(Linop_f, src_f, sol_f);
-      InnerCGtimer.Stop();
-      TotalInnerIterations += CG_f.IterationsToComplete;
-      
-      //Convert sol back to double and add to double prec solution
-      PrecChangeTimer.Start();
-      precisionChange(tmp_d, sol_f);
-      PrecChangeTimer.Stop();
-      
-      axpy(sol_d, 1.0, tmp_d, sol_d);
+      TotalTimer.Stop();
+      std::cout<<GridLogMessage<<"MixedPrecisionConjugateGradient: Inner CG iterations " << TotalInnerIterations << " Restarts " << TotalOuterIterations << " Final CG iterations " << TotalFinalStepIterations << std::endl;
+      std::cout<<GridLogMessage<<"MixedPrecisionConjugateGradient: Total time " << TotalTimer.Elapsed() << " Precision change " << PrecChangeTimer.Elapsed() << " Inner CG total " << InnerCGtimer.Elapsed() << std::endl;
     }
-    
-    //Final trial CG
-    std::cout<<GridLogMessage<<"MixedPrecisionConjugateGradient: Starting final patch-up double-precision solve"<<std::endl;
-    
-    ConjugateGradient<FieldD> CG_d(Tolerance, MaxInnerIterations);
-    CG_d(Linop_d, src_d_in, sol_d);
-    TotalFinalStepIterations = CG_d.IterationsToComplete;
+  };
 
-    TotalTimer.Stop();
-    std::cout<<GridLogMessage<<"MixedPrecisionConjugateGradient: Inner CG iterations " << TotalInnerIterations << " Restarts " << TotalOuterIterations << " Final CG iterations " << TotalFinalStepIterations << std::endl;
-    std::cout<<GridLogMessage<<"MixedPrecisionConjugateGradient: Total time " << TotalTimer.Elapsed() << " Precision change " << PrecChangeTimer.Elapsed() << " Inner CG total " << InnerCGtimer.Elapsed() << std::endl;
-  }
-};
-
-NAMESPACE_END(Grid);
+}
 
 #endif

Grid/algorithms/iterative/ConjugateGradientMultiShift.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,165 +24,147 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_CONJUGATE_MULTI_SHIFT_GRADIENT_H
 #define GRID_CONJUGATE_MULTI_SHIFT_GRADIENT_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-/////////////////////////////////////////////////////////////
-// Base classes for iterative processes based on operators
-// single input vec, single output vec.
-/////////////////////////////////////////////////////////////
+    /////////////////////////////////////////////////////////////
+    // Base classes for iterative processes based on operators
+    // single input vec, single output vec.
+    /////////////////////////////////////////////////////////////
 
-template<class Field> 
-class ConjugateGradientMultiShift : public OperatorMultiFunction<Field>,
-				    public OperatorFunction<Field>
-{
+  template<class Field> 
+    class ConjugateGradientMultiShift : public OperatorMultiFunction<Field>,
+                                        public OperatorFunction<Field>
+    {
 public:                                                
+    RealD   Tolerance;
+    Integer MaxIterations;
+    Integer IterationsToComplete; //Number of iterations the CG took to finish. Filled in upon completion
+    int verbose;
+    MultiShiftFunction shifts;
 
-  using OperatorFunction<Field>::operator();
+    ConjugateGradientMultiShift(Integer maxit,MultiShiftFunction &_shifts) : 
+	MaxIterations(maxit),
+	shifts(_shifts)
+    { 
+      verbose=1;
+    }
 
-  RealD   Tolerance;
-  Integer MaxIterations;
-  Integer IterationsToComplete; //Number of iterations the CG took to finish. Filled in upon completion
-  std::vector<int> IterationsToCompleteShift;  // Iterations for this shift
-  int verbose;
-  MultiShiftFunction shifts;
-  std::vector<RealD> TrueResidualShift;
+void operator() (LinearOperatorBase<Field> &Linop, const Field &src, Field &psi)
+{
+  GridBase *grid = src._grid;
+  int nshift = shifts.order;
+  std::vector<Field> results(nshift,grid);
+  (*this)(Linop,src,results,psi);
+}
+void operator() (LinearOperatorBase<Field> &Linop, const Field &src, std::vector<Field> &results, Field &psi)
+{
+  int nshift = shifts.order;
 
-  ConjugateGradientMultiShift(Integer maxit,MultiShiftFunction &_shifts) : 
-    MaxIterations(maxit),
-    shifts(_shifts)
-  { 
-    verbose=1;
-    IterationsToCompleteShift.resize(_shifts.order);
-    TrueResidualShift.resize(_shifts.order);
+  (*this)(Linop,src,results);
+  
+  psi = shifts.norm*src;
+  for(int i=0;i<nshift;i++){
+    psi = psi + shifts.residues[i]*results[i];
   }
 
-  void operator() (LinearOperatorBase<Field> &Linop, const Field &src, Field &psi)
-  {
-    GridBase *grid = src.Grid();
-    int nshift = shifts.order;
-    std::vector<Field> results(nshift,grid);
-    (*this)(Linop,src,results,psi);
+  return;
+}
+
+void operator() (LinearOperatorBase<Field> &Linop, const Field &src, std::vector<Field> &psi)
+{
+  
+  GridBase *grid = src._grid;
+  
+  ////////////////////////////////////////////////////////////////////////
+  // Convenience references to the info stored in "MultiShiftFunction"
+  ////////////////////////////////////////////////////////////////////////
+  int nshift = shifts.order;
+
+  std::vector<RealD> &mass(shifts.poles); // Make references to array in "shifts"
+  std::vector<RealD> &mresidual(shifts.tolerances);
+  std::vector<RealD> alpha(nshift,1.0);
+  std::vector<Field>   ps(nshift,grid);// Search directions
+
+  assert(psi.size()==nshift);
+  assert(mass.size()==nshift);
+  assert(mresidual.size()==nshift);
+  
+  // dynamic sized arrays on stack; 2d is a pain with vector
+  RealD  bs[nshift];
+  RealD  rsq[nshift];
+  RealD  z[nshift][2];
+  int     converged[nshift];
+  
+  const int       primary =0;
+  
+  //Primary shift fields CG iteration
+  RealD a,b,c,d;
+  RealD cp,bp,qq; //prev
+  
+  // Matrix mult fields
+  Field r(grid);
+  Field p(grid);
+  Field tmp(grid);
+  Field mmp(grid);
+  
+  // Check lightest mass
+  for(int s=0;s<nshift;s++){
+    assert( mass[s]>= mass[primary] );
+    converged[s]=0;
   }
-  void operator() (LinearOperatorBase<Field> &Linop, const Field &src, std::vector<Field> &results, Field &psi)
-  {
-    int nshift = shifts.order;
-
-    (*this)(Linop,src,results);
   
-    psi = shifts.norm*src;
-    for(int i=0;i<nshift;i++){
-      psi = psi + shifts.residues[i]*results[i];
-    }
-
-    return;
+  // Wire guess to zero
+  // Residuals "r" are src
+  // First search direction "p" is also src
+  cp = norm2(src);
+  for(int s=0;s<nshift;s++){
+    rsq[s] = cp * mresidual[s] * mresidual[s];
+    std::cout<<GridLogMessage<<"ConjugateGradientMultiShift: shift "<<s
+	     <<" target resid "<<rsq[s]<<std::endl;
+    ps[s] = src;
   }
-
-  void operator() (LinearOperatorBase<Field> &Linop, const Field &src, std::vector<Field> &psi)
-  {
+  // r and p for primary
+  r=src;
+  p=src;
   
-    GridBase *grid = src.Grid();
+  //MdagM+m[0]
+  Linop.HermOpAndNorm(p,mmp,d,qq);
+  axpy(mmp,mass[0],p,mmp);
+  RealD rn = norm2(p);
+  d += rn*mass[0];
   
-    ////////////////////////////////////////////////////////////////////////
-    // Convenience references to the info stored in "MultiShiftFunction"
-    ////////////////////////////////////////////////////////////////////////
-    int nshift = shifts.order;
-
-    std::vector<RealD> &mass(shifts.poles); // Make references to array in "shifts"
-    std::vector<RealD> &mresidual(shifts.tolerances);
-    std::vector<RealD> alpha(nshift,1.0);
-    std::vector<Field>   ps(nshift,grid);// Search directions
-
-    assert(psi.size()==nshift);
-    assert(mass.size()==nshift);
-    assert(mresidual.size()==nshift);
+  // have verified that inner product of 
+  // p and mmp is equal to d after this since
+  // the d computation is tricky
+  //  qq = real(innerProduct(p,mmp));
+  //  std::cout<<GridLogMessage << "debug equal ?  qq "<<qq<<" d "<< d<<std::endl;
   
-    // dynamic sized arrays on stack; 2d is a pain with vector
-    RealD  bs[nshift];
-    RealD  rsq[nshift];
-    RealD  z[nshift][2];
-    int     converged[nshift];
+  b = -cp /d;
   
-    const int       primary =0;
+  // Set up the various shift variables
+  int       iz=0;
+  z[0][1-iz] = 1.0;
+  z[0][iz]   = 1.0;
+  bs[0]      = b;
+  for(int s=1;s<nshift;s++){
+    z[s][1-iz] = 1.0;
+    z[s][iz]   = 1.0/( 1.0 - b*(mass[s]-mass[0]));
+    bs[s]      = b*z[s][iz]; 
+  }
   
-    //Primary shift fields CG iteration
-    RealD a,b,c,d;
-    RealD cp,bp,qq; //prev
-  
-    // Matrix mult fields
-    Field r(grid);
-    Field p(grid);
-    Field tmp(grid);
-    Field mmp(grid);
-  
-    // Check lightest mass
-    for(int s=0;s<nshift;s++){
-      assert( mass[s]>= mass[primary] );
-      converged[s]=0;
-    }
-  
-    // Wire guess to zero
-    // Residuals "r" are src
-    // First search direction "p" is also src
-    cp = norm2(src);
-
-    // Handle trivial case of zero src.
-    if( cp == 0. ){
-      for(int s=0;s<nshift;s++){
-	psi[s] = Zero();
-	IterationsToCompleteShift[s] = 1;
-	TrueResidualShift[s] = 0.;
-      }
-      return;
-    }
-
-    for(int s=0;s<nshift;s++){
-      rsq[s] = cp * mresidual[s] * mresidual[s];
-      std::cout<<GridLogMessage<<"ConjugateGradientMultiShift: shift "<<s
-	       <<" target resid "<<rsq[s]<<std::endl;
-      ps[s] = src;
-    }
-    // r and p for primary
-    r=src;
-    p=src;
-  
-    //MdagM+m[0]
-    Linop.HermOpAndNorm(p,mmp,d,qq);
-    axpy(mmp,mass[0],p,mmp);
-    RealD rn = norm2(p);
-    d += rn*mass[0];
-  
-    // have verified that inner product of 
-    // p and mmp is equal to d after this since
-    // the d computation is tricky
-    //  qq = real(innerProduct(p,mmp));
-    //  std::cout<<GridLogMessage << "debug equal ?  qq "<<qq<<" d "<< d<<std::endl;
-  
-    b = -cp /d;
-  
-    // Set up the various shift variables
-    int       iz=0;
-    z[0][1-iz] = 1.0;
-    z[0][iz]   = 1.0;
-    bs[0]      = b;
-    for(int s=1;s<nshift;s++){
-      z[s][1-iz] = 1.0;
-      z[s][iz]   = 1.0/( 1.0 - b*(mass[s]-mass[0]));
-      bs[s]      = b*z[s][iz]; 
-    }
-  
-    // r += b[0] A.p[0]
-    // c= norm(r)
-    c=axpy_norm(r,b,mmp,r);
-  
-    for(int s=0;s<nshift;s++) {
-      axpby(psi[s],0.,-bs[s]*alpha[s],src,src);
-    }
+  // r += b[0] A.p[0]
+  // c= norm(r)
+  c=axpy_norm(r,b,mmp,r);
   
+  for(int s=0;s<nshift;s++) {
+    axpby(psi[s],0.,-bs[s]*alpha[s],src,src);
+  }
+ 
   ///////////////////////////////////////
   // Timers
   ///////////////////////////////////////
@@ -193,37 +175,37 @@ public:
   GridStopWatch SolverTimer;
   SolverTimer.Start();
   
-    // Iteration loop
-    int k;
+  // Iteration loop
+  int k;
   
-    for (k=1;k<=MaxIterations;k++){
+  for (k=1;k<=MaxIterations;k++){
     
-      a = c /cp;
+    a = c /cp;
     AXPYTimer.Start();
-      axpy(p,a,p,r);
+    axpy(p,a,p,r);
     AXPYTimer.Stop();
     
-      // Note to self - direction ps is iterated seperately
-      // for each shift. Does not appear to have any scope
-      // for avoiding linear algebra in "single" case.
-      // 
-      // However SAME r is used. Could load "r" and update
-      // ALL ps[s]. 2/3 Bandwidth saving
-      // New Kernel: Load r, vector of coeffs, vector of pointers ps
+    // Note to self - direction ps is iterated seperately
+    // for each shift. Does not appear to have any scope
+    // for avoiding linear algebra in "single" case.
+    // 
+    // However SAME r is used. Could load "r" and update
+    // ALL ps[s]. 2/3 Bandwidth saving
+    // New Kernel: Load r, vector of coeffs, vector of pointers ps
     AXPYTimer.Start();
-      for(int s=0;s<nshift;s++){
-	if ( ! converged[s] ) { 
-	  if (s==0){
-	    axpy(ps[s],a,ps[s],r);
-	  } else{
-	    RealD as =a *z[s][iz]*bs[s] /(z[s][1-iz]*b);
-	    axpby(ps[s],z[s][iz],as,r,ps[s]);
-	  }
+    for(int s=0;s<nshift;s++){
+      if ( ! converged[s] ) { 
+	if (s==0){
+	  axpy(ps[s],a,ps[s],r);
+	} else{
+	  RealD as =a *z[s][iz]*bs[s] /(z[s][1-iz]*b);
+	  axpby(ps[s],z[s][iz],as,r,ps[s]);
 	}
       }
+    }
     AXPYTimer.Stop();
     
-      cp=c;
+    cp=c;
     MatrixTimer.Start();  
     //Linop.HermOpAndNorm(p,mmp,d,qq); // d is used
     // The below is faster on KNL
@@ -233,91 +215,89 @@ public:
     MatrixTimer.Stop();  
 
     AXPYTimer.Start();
-      axpy(mmp,mass[0],p,mmp);
+    axpy(mmp,mass[0],p,mmp);
     AXPYTimer.Stop();
-      RealD rn = norm2(p);
-      d += rn*mass[0];
+    RealD rn = norm2(p);
+    d += rn*mass[0];
     
-      bp=b;
-      b=-cp/d;
+    bp=b;
+    b=-cp/d;
     
     AXPYTimer.Start();
-      c=axpy_norm(r,b,mmp,r);
+    c=axpy_norm(r,b,mmp,r);
     AXPYTimer.Stop();
 
-      // Toggle the recurrence history
-      bs[0] = b;
-      iz = 1-iz;
+    // Toggle the recurrence history
+    bs[0] = b;
+    iz = 1-iz;
     ShiftTimer.Start();
-      for(int s=1;s<nshift;s++){
-	if((!converged[s])){
-	  RealD z0 = z[s][1-iz];
-	  RealD z1 = z[s][iz];
-	  z[s][iz] = z0*z1*bp
-	    / (b*a*(z1-z0) + z1*bp*(1- (mass[s]-mass[0])*b)); 
-	  bs[s] = b*z[s][iz]/z0; // NB sign  rel to Mike
-	}
+    for(int s=1;s<nshift;s++){
+      if((!converged[s])){
+	RealD z0 = z[s][1-iz];
+	RealD z1 = z[s][iz];
+	z[s][iz] = z0*z1*bp
+	  / (b*a*(z1-z0) + z1*bp*(1- (mass[s]-mass[0])*b)); 
+	bs[s] = b*z[s][iz]/z0; // NB sign  rel to Mike
       }
+    }
     ShiftTimer.Stop();
     
-      for(int s=0;s<nshift;s++){
-	int ss = s;
-	// Scope for optimisation here in case of "single".
-	// Could load psi[0] and pull all ps[s] in.
-	//      if ( single ) ss=primary;
-	// Bandwith saving in single case is Ls * 3 -> 2+Ls, so ~ 3x saving
-	// Pipelined CG gain:
-	//
-	// New Kernel: Load r, vector of coeffs, vector of pointers ps
-	// New Kernel: Load psi[0], vector of coeffs, vector of pointers ps
-	// If can predict the coefficient bs then we can fuse these and avoid write reread cyce
-	//  on ps[s].
-	// Before:  3 x npole  + 3 x npole
-	// After :  2 x npole (ps[s])        => 3x speed up of multishift CG.
+    for(int s=0;s<nshift;s++){
+      int ss = s;
+      // Scope for optimisation here in case of "single".
+      // Could load psi[0] and pull all ps[s] in.
+      //      if ( single ) ss=primary;
+      // Bandwith saving in single case is Ls * 3 -> 2+Ls, so ~ 3x saving
+      // Pipelined CG gain:
+      //
+      // New Kernel: Load r, vector of coeffs, vector of pointers ps
+      // New Kernel: Load psi[0], vector of coeffs, vector of pointers ps
+      // If can predict the coefficient bs then we can fuse these and avoid write reread cyce
+      //  on ps[s].
+      // Before:  3 x npole  + 3 x npole
+      // After :  2 x npole (ps[s])        => 3x speed up of multishift CG.
       
-	if( (!converged[s]) ) { 
-	  axpy(psi[ss],-bs[s]*alpha[s],ps[s],psi[ss]);
-	}
+      if( (!converged[s]) ) { 
+	axpy(psi[ss],-bs[s]*alpha[s],ps[s],psi[ss]);
       }
+    }
     
-      // Convergence checks
-      int all_converged = 1;
-      for(int s=0;s<nshift;s++){
+    // Convergence checks
+    int all_converged = 1;
+    for(int s=0;s<nshift;s++){
       
-	if ( (!converged[s]) ){
-	  IterationsToCompleteShift[s] = k;
+      if ( (!converged[s]) ){
 	
-	  RealD css  = c * z[s][iz]* z[s][iz];
+	RealD css  = c * z[s][iz]* z[s][iz];
 	
-	  if(css<rsq[s]){
-	    if ( ! converged[s] )
-	      std::cout<<GridLogMessage<<"ConjugateGradientMultiShift k="<<k<<" Shift "<<s<<" has converged"<<std::endl;
-	    converged[s]=1;
-	  } else {
-	    all_converged=0;
-	  }
+	if(css<rsq[s]){
+	  if ( ! converged[s] )
+	    std::cout<<GridLogMessage<<"ConjugateGradientMultiShift k="<<k<<" Shift "<<s<<" has converged"<<std::endl;
+	      converged[s]=1;
+	} else {
+	  all_converged=0;
+	}
 
-	}
       }
+    }
     
-      if ( all_converged ){
+    if ( all_converged ){
 
     SolverTimer.Stop();
 
 
-	std::cout<<GridLogMessage<< "CGMultiShift: All shifts have converged iteration "<<k<<std::endl;
-	std::cout<<GridLogMessage<< "CGMultiShift: Checking solutions"<<std::endl;
+      std::cout<<GridLogMessage<< "CGMultiShift: All shifts have converged iteration "<<k<<std::endl;
+      std::cout<<GridLogMessage<< "CGMultiShift: Checking solutions"<<std::endl;
       
-	// Check answers 
-	for(int s=0; s < nshift; s++) { 
-	  Linop.HermOpAndNorm(psi[s],mmp,d,qq);
-	  axpy(tmp,mass[s],psi[s],mmp);
-	  axpy(r,-alpha[s],src,tmp);
-	  RealD rn = norm2(r);
-	  RealD cn = norm2(src);
-	  TrueResidualShift[s] = std::sqrt(rn/cn);
-	  std::cout<<GridLogMessage<<"CGMultiShift: shift["<<s<<"] true residual "<< TrueResidualShift[s] <<std::endl;
-	}
+      // Check answers 
+      for(int s=0; s < nshift; s++) { 
+	Linop.HermOpAndNorm(psi[s],mmp,d,qq);
+	axpy(tmp,mass[s],psi[s],mmp);
+	axpy(r,-alpha[s],src,tmp);
+	RealD rn = norm2(r);
+	RealD cn = norm2(src);
+	std::cout<<GridLogMessage<<"CGMultiShift: shift["<<s<<"] true residual "<<std::sqrt(rn/cn)<<std::endl;
+      }
 
       std::cout << GridLogMessage << "Time Breakdown "<<std::endl;
       std::cout << GridLogMessage << "\tElapsed    " << SolverTimer.Elapsed()     <<std::endl;
@@ -327,16 +307,16 @@ public:
 
       IterationsToComplete = k;	
 
-	return;
-      }
+      return;
+    }
 
    
-    }
-    // ugly hack
-    std::cout<<GridLogMessage<<"CG multi shift did not converge"<<std::endl;
-    //  assert(0);
   }
+  // ugly hack
+  std::cout<<GridLogMessage<<"CG multi shift did not converge"<<std::endl;
+//  assert(0);
+}
 
-};
-NAMESPACE_END(Grid);
+  };
+}
 #endif

Grid/algorithms/iterative/ConjugateGradientReliableUpdate.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,236 +23,234 @@ Author: Christopher Kelly <ckelly@phys.columbia.edu>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_CONJUGATE_GRADIENT_RELIABLE_UPDATE_H
 #define GRID_CONJUGATE_GRADIENT_RELIABLE_UPDATE_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-template<class FieldD,class FieldF, 
-	 typename std::enable_if< getPrecision<FieldD>::value == 2, int>::type = 0,
-	 typename std::enable_if< getPrecision<FieldF>::value == 1, int>::type = 0> 
-class ConjugateGradientReliableUpdate : public LinearFunction<FieldD> {
-public:
-  bool ErrorOnNoConverge;  // throw an assert when the CG fails to converge.
-  // Defaults true.
-  RealD Tolerance;
-  Integer MaxIterations;
-  Integer IterationsToComplete; //Number of iterations the CG took to finish. Filled in upon completion
-  Integer ReliableUpdatesPerformed;
+  template<class FieldD,class FieldF, typename std::enable_if< getPrecision<FieldD>::value == 2, int>::type = 0,typename std::enable_if< getPrecision<FieldF>::value == 1, int>::type = 0> 
+  class ConjugateGradientReliableUpdate : public LinearFunction<FieldD> {
+  public:
+    bool ErrorOnNoConverge;  // throw an assert when the CG fails to converge.
+    // Defaults true.
+    RealD Tolerance;
+    Integer MaxIterations;
+    Integer IterationsToComplete; //Number of iterations the CG took to finish. Filled in upon completion
+    Integer ReliableUpdatesPerformed;
 
-  bool DoFinalCleanup; //Final DP cleanup, defaults to true
-  Integer IterationsToCleanup; //Final DP cleanup step iterations
+    bool DoFinalCleanup; //Final DP cleanup, defaults to true
+    Integer IterationsToCleanup; //Final DP cleanup step iterations
     
-  LinearOperatorBase<FieldF> &Linop_f;
-  LinearOperatorBase<FieldD> &Linop_d;
-  GridBase* SinglePrecGrid;
-  RealD Delta; //reliable update parameter
+    LinearOperatorBase<FieldF> &Linop_f;
+    LinearOperatorBase<FieldD> &Linop_d;
+    GridBase* SinglePrecGrid;
+    RealD Delta; //reliable update parameter
 
-  //Optional ability to switch to a different linear operator once the tolerance reaches a certain point. Useful for single/half -> single/single
-  LinearOperatorBase<FieldF> *Linop_fallback;
-  RealD fallback_transition_tol;
+    //Optional ability to switch to a different linear operator once the tolerance reaches a certain point. Useful for single/half -> single/single
+    LinearOperatorBase<FieldF> *Linop_fallback;
+    RealD fallback_transition_tol;
 
     
-  ConjugateGradientReliableUpdate(RealD tol, Integer maxit, RealD _delta, GridBase* _sp_grid, LinearOperatorBase<FieldF> &_Linop_f, LinearOperatorBase<FieldD> &_Linop_d, bool err_on_no_conv = true)
-    : Tolerance(tol),
-      MaxIterations(maxit),
-      Delta(_delta),
-      Linop_f(_Linop_f),
-      Linop_d(_Linop_d),
-      SinglePrecGrid(_sp_grid),
-      ErrorOnNoConverge(err_on_no_conv),
-      DoFinalCleanup(true),
-      Linop_fallback(NULL)
-  {};
+    ConjugateGradientReliableUpdate(RealD tol, Integer maxit, RealD _delta, GridBase* _sp_grid, LinearOperatorBase<FieldF> &_Linop_f, LinearOperatorBase<FieldD> &_Linop_d, bool err_on_no_conv = true)
+      : Tolerance(tol),
+        MaxIterations(maxit),
+	Delta(_delta),
+	Linop_f(_Linop_f),
+	Linop_d(_Linop_d),
+	SinglePrecGrid(_sp_grid),
+        ErrorOnNoConverge(err_on_no_conv),
+	DoFinalCleanup(true),
+	Linop_fallback(NULL)
+    {};
 
-  void setFallbackLinop(LinearOperatorBase<FieldF> &_Linop_fallback, const RealD _fallback_transition_tol){
-    Linop_fallback = &_Linop_fallback;
-    fallback_transition_tol = _fallback_transition_tol;      
-  }
-    
-  void operator()(const FieldD &src, FieldD &psi) {
-    LinearOperatorBase<FieldF> *Linop_f_use = &Linop_f;
-    bool using_fallback = false;
-      
-    psi.Checkerboard() = src.Checkerboard();
-    conformable(psi, src);
-
-    RealD cp, c, a, d, b, ssq, qq, b_pred;
-
-    FieldD p(src);
-    FieldD mmp(src);
-    FieldD r(src);
-
-    // Initial residual computation & set up
-    RealD guess = norm2(psi);
-    assert(std::isnan(guess) == 0);
-    
-    Linop_d.HermOpAndNorm(psi, mmp, d, b);
-    
-    r = src - mmp;
-    p = r;
-
-    a = norm2(p);
-    cp = a;
-    ssq = norm2(src);
-
-    std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate: guess " << guess << std::endl;
-    std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate:   src " << ssq << std::endl;
-    std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate:    mp " << d << std::endl;
-    std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate:   mmp " << b << std::endl;
-    std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate:  cp,r " << cp << std::endl;
-    std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate:     p " << a << std::endl;
-
-    RealD rsq = Tolerance * Tolerance * ssq;
-
-    // Check if guess is really REALLY good :)
-    if (cp <= rsq) {
-      std::cout << GridLogMessage << "ConjugateGradientReliableUpdate guess was REALLY good\n";
-      std::cout << GridLogMessage << "\tComputed residual " << std::sqrt(cp / ssq)<<std::endl;
-      return;
+    void setFallbackLinop(LinearOperatorBase<FieldF> &_Linop_fallback, const RealD _fallback_transition_tol){
+      Linop_fallback = &_Linop_fallback;
+      fallback_transition_tol = _fallback_transition_tol;      
     }
-
-    //Single prec initialization
-    FieldF r_f(SinglePrecGrid);
-    r_f.Checkerboard() = r.Checkerboard();
-    precisionChange(r_f, r);
-
-    FieldF psi_f(r_f);
-    psi_f = Zero();
-
-    FieldF p_f(r_f);
-    FieldF mmp_f(r_f);
-
-    RealD MaxResidSinceLastRelUp = cp; //initial residual    
     
-    std::cout << GridLogIterative << std::setprecision(4)
-	      << "ConjugateGradient: k=0 residual " << cp << " target " << rsq << std::endl;
+    void operator()(const FieldD &src, FieldD &psi) {
+      LinearOperatorBase<FieldF> *Linop_f_use = &Linop_f;
+      bool using_fallback = false;
+      
+      psi.checkerboard = src.checkerboard;
+      conformable(psi, src);
 
-    GridStopWatch LinalgTimer;
-    GridStopWatch MatrixTimer;
-    GridStopWatch SolverTimer;
+      RealD cp, c, a, d, b, ssq, qq, b_pred;
 
-    SolverTimer.Start();
-    int k = 0;
-    int l = 0;
+      FieldD p(src);
+      FieldD mmp(src);
+      FieldD r(src);
+
+      // Initial residual computation & set up
+      RealD guess = norm2(psi);
+      assert(std::isnan(guess) == 0);
     
-    for (k = 1; k <= MaxIterations; k++) {
-      c = cp;
+      Linop_d.HermOpAndNorm(psi, mmp, d, b);
+    
+      r = src - mmp;
+      p = r;
 
-      MatrixTimer.Start();
-      Linop_f_use->HermOpAndNorm(p_f, mmp_f, d, qq);
-      MatrixTimer.Stop();
+      a = norm2(p);
+      cp = a;
+      ssq = norm2(src);
 
-      LinalgTimer.Start();
+      std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate: guess " << guess << std::endl;
+      std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate:   src " << ssq << std::endl;
+      std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate:    mp " << d << std::endl;
+      std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate:   mmp " << b << std::endl;
+      std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate:  cp,r " << cp << std::endl;
+      std::cout << GridLogIterative << std::setprecision(4) << "ConjugateGradientReliableUpdate:     p " << a << std::endl;
 
-      a = c / d;
-      b_pred = a * (a * qq - d) / c;
+      RealD rsq = Tolerance * Tolerance * ssq;
 
-      cp = axpy_norm(r_f, -a, mmp_f, r_f);
-      b = cp / c;
-
-      // Fuse these loops ; should be really easy
-      psi_f = a * p_f + psi_f;
-      //p_f = p_f * b + r_f;
-
-      LinalgTimer.Stop();
-
-      std::cout << GridLogIterative << "ConjugateGradientReliableUpdate: Iteration " << k
-		<< " residual " << cp << " target " << rsq << std::endl;
-      std::cout << GridLogDebug << "a = "<< a << " b_pred = "<< b_pred << "  b = "<< b << std::endl;
-      std::cout << GridLogDebug << "qq = "<< qq << " d = "<< d << "  c = "<< c << std::endl;
-
-      if(cp > MaxResidSinceLastRelUp){
-	std::cout << GridLogIterative << "ConjugateGradientReliableUpdate: updating MaxResidSinceLastRelUp : " << MaxResidSinceLastRelUp << " -> " << cp << std::endl;
-	MaxResidSinceLastRelUp = cp;
-      }
-	  
-      // Stopping condition
+      // Check if guess is really REALLY good :)
       if (cp <= rsq) {
-	//Although not written in the paper, I assume that I have to add on the final solution
-	precisionChange(mmp, psi_f);
-	psi = psi + mmp;
-	
-	
-	SolverTimer.Stop();
-	Linop_d.HermOpAndNorm(psi, mmp, d, qq);
-	p = mmp - src;
-
-	RealD srcnorm = std::sqrt(norm2(src));
-	RealD resnorm = std::sqrt(norm2(p));
-	RealD true_residual = resnorm / srcnorm;
-
-	std::cout << GridLogMessage << "ConjugateGradientReliableUpdate Converged on iteration " << k << " after " << l << " reliable updates" << std::endl;
-	std::cout << GridLogMessage << "\tComputed residual " << std::sqrt(cp / ssq)<<std::endl;
-	std::cout << GridLogMessage << "\tTrue residual " << true_residual<<std::endl;
-	std::cout << GridLogMessage << "\tTarget " << Tolerance << std::endl;
-
-	std::cout << GridLogMessage << "Time breakdown "<<std::endl;
-	std::cout << GridLogMessage << "\tElapsed    " << SolverTimer.Elapsed() <<std::endl;
-	std::cout << GridLogMessage << "\tMatrix     " << MatrixTimer.Elapsed() <<std::endl;
-	std::cout << GridLogMessage << "\tLinalg     " << LinalgTimer.Elapsed() <<std::endl;
-
-	IterationsToComplete = k;	
-	ReliableUpdatesPerformed = l;
-	  
-	if(DoFinalCleanup){
-	  //Do a final CG to cleanup
-	  std::cout << GridLogMessage << "ConjugateGradientReliableUpdate performing final cleanup.\n";
-	  ConjugateGradient<FieldD> CG(Tolerance,MaxIterations);
-	  CG.ErrorOnNoConverge = ErrorOnNoConverge;
-	  CG(Linop_d,src,psi);
-	  IterationsToCleanup = CG.IterationsToComplete;
-	}
-	else if (ErrorOnNoConverge) assert(true_residual / Tolerance < 10000.0);
-
-	std::cout << GridLogMessage << "ConjugateGradientReliableUpdate complete.\n";
+	std::cout << GridLogMessage << "ConjugateGradientReliableUpdate guess was REALLY good\n";
+	std::cout << GridLogMessage << "\tComputed residual " << sqrt(cp / ssq)<<std::endl;
 	return;
       }
-      else if(cp < Delta * MaxResidSinceLastRelUp) { //reliable update
-	std::cout << GridLogMessage << "ConjugateGradientReliableUpdate "
-		  << cp << "(residual) < " << Delta << "(Delta) * " << MaxResidSinceLastRelUp << "(MaxResidSinceLastRelUp) on iteration " << k << " : performing reliable update\n";
-	precisionChange(mmp, psi_f);
-	psi = psi + mmp;
 
-	Linop_d.HermOpAndNorm(psi, mmp, d, qq);
-	r = src - mmp;
+      //Single prec initialization
+      FieldF r_f(SinglePrecGrid);
+      r_f.checkerboard = r.checkerboard;
+      precisionChange(r_f, r);
 
-	psi_f = Zero();
-	precisionChange(r_f, r);
-	cp = norm2(r);
-	MaxResidSinceLastRelUp = cp;
+      FieldF psi_f(r_f);
+      psi_f = zero;
 
-	b = cp/c;
+      FieldF p_f(r_f);
+      FieldF mmp_f(r_f);
+
+      RealD MaxResidSinceLastRelUp = cp; //initial residual    
+    
+      std::cout << GridLogIterative << std::setprecision(4)
+		<< "ConjugateGradient: k=0 residual " << cp << " target " << rsq << std::endl;
+
+      GridStopWatch LinalgTimer;
+      GridStopWatch MatrixTimer;
+      GridStopWatch SolverTimer;
+
+      SolverTimer.Start();
+      int k = 0;
+      int l = 0;
+    
+      for (k = 1; k <= MaxIterations; k++) {
+	c = cp;
+
+	MatrixTimer.Start();
+	Linop_f_use->HermOpAndNorm(p_f, mmp_f, d, qq);
+	MatrixTimer.Stop();
+
+	LinalgTimer.Start();
+
+	a = c / d;
+	b_pred = a * (a * qq - d) / c;
+
+	cp = axpy_norm(r_f, -a, mmp_f, r_f);
+	b = cp / c;
+
+	// Fuse these loops ; should be really easy
+	psi_f = a * p_f + psi_f;
+	//p_f = p_f * b + r_f;
+
+	LinalgTimer.Stop();
+
+	std::cout << GridLogIterative << "ConjugateGradientReliableUpdate: Iteration " << k
+		  << " residual " << cp << " target " << rsq << std::endl;
+	std::cout << GridLogDebug << "a = "<< a << " b_pred = "<< b_pred << "  b = "<< b << std::endl;
+	std::cout << GridLogDebug << "qq = "<< qq << " d = "<< d << "  c = "<< c << std::endl;
+
+	if(cp > MaxResidSinceLastRelUp){
+	  std::cout << GridLogIterative << "ConjugateGradientReliableUpdate: updating MaxResidSinceLastRelUp : " << MaxResidSinceLastRelUp << " -> " << cp << std::endl;
+	  MaxResidSinceLastRelUp = cp;
+	}
 	  
-	std::cout << GridLogMessage << "ConjugateGradientReliableUpdate new residual " << cp << std::endl;
+	// Stopping condition
+	if (cp <= rsq) {
+	  //Although not written in the paper, I assume that I have to add on the final solution
+	  precisionChange(mmp, psi_f);
+	  psi = psi + mmp;
+	
+	
+	  SolverTimer.Stop();
+	  Linop_d.HermOpAndNorm(psi, mmp, d, qq);
+	  p = mmp - src;
+
+	  RealD srcnorm = sqrt(norm2(src));
+	  RealD resnorm = sqrt(norm2(p));
+	  RealD true_residual = resnorm / srcnorm;
+
+	  std::cout << GridLogMessage << "ConjugateGradientReliableUpdate Converged on iteration " << k << " after " << l << " reliable updates" << std::endl;
+	  std::cout << GridLogMessage << "\tComputed residual " << sqrt(cp / ssq)<<std::endl;
+	  std::cout << GridLogMessage << "\tTrue residual " << true_residual<<std::endl;
+	  std::cout << GridLogMessage << "\tTarget " << Tolerance << std::endl;
+
+	  std::cout << GridLogMessage << "Time breakdown "<<std::endl;
+	  std::cout << GridLogMessage << "\tElapsed    " << SolverTimer.Elapsed() <<std::endl;
+	  std::cout << GridLogMessage << "\tMatrix     " << MatrixTimer.Elapsed() <<std::endl;
+	  std::cout << GridLogMessage << "\tLinalg     " << LinalgTimer.Elapsed() <<std::endl;
+
+	  IterationsToComplete = k;	
+	  ReliableUpdatesPerformed = l;
 	  
-	l = l+1;
-      }
+	  if(DoFinalCleanup){
+	    //Do a final CG to cleanup
+	    std::cout << GridLogMessage << "ConjugateGradientReliableUpdate performing final cleanup.\n";
+	    ConjugateGradient<FieldD> CG(Tolerance,MaxIterations);
+	    CG.ErrorOnNoConverge = ErrorOnNoConverge;
+	    CG(Linop_d,src,psi);
+	    IterationsToCleanup = CG.IterationsToComplete;
+	  }
+	  else if (ErrorOnNoConverge) assert(true_residual / Tolerance < 10000.0);
 
-      p_f = p_f * b + r_f; //update search vector after reliable update appears to help convergence
+	  std::cout << GridLogMessage << "ConjugateGradientReliableUpdate complete.\n";
+	  return;
+	}
+	else if(cp < Delta * MaxResidSinceLastRelUp) { //reliable update
+	  std::cout << GridLogMessage << "ConjugateGradientReliableUpdate "
+		    << cp << "(residual) < " << Delta << "(Delta) * " << MaxResidSinceLastRelUp << "(MaxResidSinceLastRelUp) on iteration " << k << " : performing reliable update\n";
+	  precisionChange(mmp, psi_f);
+	  psi = psi + mmp;
 
-      if(!using_fallback && Linop_fallback != NULL && cp < fallback_transition_tol){
-	std::cout << GridLogMessage << "ConjugateGradientReliableUpdate switching to fallback linear operator on iteration " << k << " at residual " << cp << std::endl;
-	Linop_f_use = Linop_fallback;
-	using_fallback = true;
-      }
+	  Linop_d.HermOpAndNorm(psi, mmp, d, qq);
+	  r = src - mmp;
+
+	  psi_f = zero;
+	  precisionChange(r_f, r);
+	  cp = norm2(r);
+	  MaxResidSinceLastRelUp = cp;
+
+	  b = cp/c;
+	  
+	  std::cout << GridLogMessage << "ConjugateGradientReliableUpdate new residual " << cp << std::endl;
+	  
+	  l = l+1;
+	}
+
+	p_f = p_f * b + r_f; //update search vector after reliable update appears to help convergence
+
+	if(!using_fallback && Linop_fallback != NULL && cp < fallback_transition_tol){
+	  std::cout << GridLogMessage << "ConjugateGradientReliableUpdate switching to fallback linear operator on iteration " << k << " at residual " << cp << std::endl;
+	  Linop_f_use = Linop_fallback;
+	  using_fallback = true;
+	}
 
 	
-    }
-    std::cout << GridLogMessage << "ConjugateGradientReliableUpdate did NOT converge"
-	      << std::endl;
+      }
+      std::cout << GridLogMessage << "ConjugateGradientReliableUpdate did NOT converge"
+		<< std::endl;
       
-    if (ErrorOnNoConverge) assert(0);
-    IterationsToComplete = k;
-    ReliableUpdatesPerformed = l;      
-  }    
+      if (ErrorOnNoConverge) assert(0);
+      IterationsToComplete = k;
+      ReliableUpdatesPerformed = l;      
+    }    
+  };
+
+
 };
 
 
-NAMESPACE_END(Grid);
-
-
 
 #endif

Grid/algorithms/iterative/ConjugateResidual.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,90 +24,88 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_CONJUGATE_RESIDUAL_H
 #define GRID_CONJUGATE_RESIDUAL_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-/////////////////////////////////////////////////////////////
-// Base classes for iterative processes based on operators
-// single input vec, single output vec.
-/////////////////////////////////////////////////////////////
+    /////////////////////////////////////////////////////////////
+    // Base classes for iterative processes based on operators
+    // single input vec, single output vec.
+    /////////////////////////////////////////////////////////////
 
-template<class Field> 
-class ConjugateResidual : public OperatorFunction<Field> {
-public:                                                
-  using OperatorFunction<Field>::operator();
+  template<class Field> 
+    class ConjugateResidual : public OperatorFunction<Field> {
+  public:                                                
+    RealD   Tolerance;
+    Integer MaxIterations;
+    int verbose;
 
-  RealD   Tolerance;
-  Integer MaxIterations;
-  int verbose;
+    ConjugateResidual(RealD tol,Integer maxit) : Tolerance(tol), MaxIterations(maxit) { 
+      verbose=0;
+    };
 
-  ConjugateResidual(RealD tol,Integer maxit) : Tolerance(tol), MaxIterations(maxit) { 
-    verbose=0;
-  };
+    void operator() (LinearOperatorBase<Field> &Linop,const Field &src, Field &psi){
 
-  void operator() (LinearOperatorBase<Field> &Linop,const Field &src, Field &psi){
-
-    RealD a, b; // c, d;
-    RealD cp, ssq,rsq;
+      RealD a, b, c, d;
+      RealD cp, ssq,rsq;
       
-    RealD rAr, rAAr, rArp;
-    RealD pAp, pAAp;
+      RealD rAr, rAAr, rArp;
+      RealD pAp, pAAp;
 
-    GridBase *grid = src.Grid();
-    psi=Zero();
-    Field r(grid),  p(grid), Ap(grid), Ar(grid);
+      GridBase *grid = src._grid;
+      psi=zero;
+      Field r(grid),  p(grid), Ap(grid), Ar(grid);
       
-    r=src;
-    p=src;
-
-    Linop.HermOpAndNorm(p,Ap,pAp,pAAp);
-    Linop.HermOpAndNorm(r,Ar,rAr,rAAr);
-
-    cp =norm2(r);
-    ssq=norm2(src);
-    rsq=Tolerance*Tolerance*ssq;
-
-    if (verbose) std::cout<<GridLogMessage<<"ConjugateResidual: iteration " <<0<<" residual "<<cp<< " target"<< rsq<<std::endl;
-
-    for(int k=1;k<MaxIterations;k++){
-
-      a = rAr/pAAp;
-
-      axpy(psi,a,p,psi);
-
-      cp = axpy_norm(r,-a,Ap,r);
-
-      rArp=rAr;
+      r=src;
+      p=src;
 
+      Linop.HermOpAndNorm(p,Ap,pAp,pAAp);
       Linop.HermOpAndNorm(r,Ar,rAr,rAAr);
 
-      b   =rAr/rArp;
- 
-      axpy(p,b,p,r);
-      pAAp=axpy_norm(Ap,b,Ap,Ar);
-	
-      if(verbose) std::cout<<GridLogMessage<<"ConjugateResidual: iteration " <<k<<" residual "<<cp<< " target"<< rsq<<std::endl;
+      cp =norm2(r);
+      ssq=norm2(src);
+      rsq=Tolerance*Tolerance*ssq;
+
+      if (verbose) std::cout<<GridLogMessage<<"ConjugateResidual: iteration " <<0<<" residual "<<cp<< " target"<< rsq<<std::endl;
+
+      for(int k=1;k<MaxIterations;k++){
+
+	a = rAr/pAAp;
+
+	axpy(psi,a,p,psi);
+
+	cp = axpy_norm(r,-a,Ap,r);
+
+	rArp=rAr;
+
+	Linop.HermOpAndNorm(r,Ar,rAr,rAAr);
+
+	b   =rAr/rArp;
+ 
+	axpy(p,b,p,r);
+	pAAp=axpy_norm(Ap,b,Ap,Ar);
+	
+	if(verbose) std::cout<<GridLogMessage<<"ConjugateResidual: iteration " <<k<<" residual "<<cp<< " target"<< rsq<<std::endl;
+
+	if(cp<rsq) {
+	  Linop.HermOp(psi,Ap);
+	  axpy(r,-1.0,src,Ap);
+	  RealD true_resid = norm2(r)/ssq;
+	  std::cout<<GridLogMessage<<"ConjugateResidual: Converged on iteration " <<k
+		   << " computed residual "<<sqrt(cp/ssq)
+	           << " true residual "<<sqrt(true_resid)
+	           << " target "       <<Tolerance <<std::endl;
+	  return;
+	}
 
-      if(cp<rsq) {
-	Linop.HermOp(psi,Ap);
-	axpy(r,-1.0,src,Ap);
-	RealD true_resid = norm2(r)/ssq;
-	std::cout<<GridLogMessage<<"ConjugateResidual: Converged on iteration " <<k
-		 << " computed residual "<<std::sqrt(cp/ssq)
-		 << " true residual "<<std::sqrt(true_resid)
-		 << " target "       <<Tolerance <<std::endl;
-	return;
       }
 
+      std::cout<<GridLogMessage<<"ConjugateResidual did NOT converge"<<std::endl;
+      assert(0);
     }
-
-    std::cout<<GridLogMessage<<"ConjugateResidual did NOT converge"<<std::endl;
-    assert(0);
-  }
-};
-NAMESPACE_END(Grid);
+  };
+}
 #endif

Grid/algorithms/iterative/Deflation.h

@@ -33,13 +33,9 @@ namespace Grid {
 template<class Field>
 class ZeroGuesser: public LinearFunction<Field> {
 public:
-    virtual void operator()(const Field &src, Field &guess) { guess = Zero(); };
-};
-template<class Field>
-class DoNothingGuesser: public LinearFunction<Field> {
-public:
-  virtual void operator()(const Field &src, Field &guess) {  };
+  virtual void operator()(const Field &src, Field &guess) { guess = zero; };
 };
+
 template<class Field>
 class SourceGuesser: public LinearFunction<Field> {
 public:
@@ -60,14 +56,14 @@ public:
   DeflatedGuesser(const std::vector<Field> & _evec,const std::vector<RealD> & _eval) : evec(_evec), eval(_eval) {};
 
   virtual void operator()(const Field &src,Field &guess) {
-    guess = Zero();
+    guess = zero;
     assert(evec.size()==eval.size());
     auto N = evec.size();
     for (int i=0;i<N;i++) {
       const Field& tmp = evec[i];
       axpy(guess,TensorRemove(innerProduct(tmp,src)) / eval[i],tmp,guess);
     }
-    guess.Checkerboard() = src.Checkerboard();
+    guess.checkerboard = src.checkerboard;
   }
 };
 
@@ -90,15 +86,15 @@ public:
   
   void operator()(const FineField &src,FineField &guess) { 
     int N = (int)evec_coarse.size();
-    CoarseField src_coarse(evec_coarse[0].Grid());
-    CoarseField guess_coarse(evec_coarse[0].Grid());    guess_coarse = Zero();
+    CoarseField src_coarse(evec_coarse[0]._grid);
+    CoarseField guess_coarse(evec_coarse[0]._grid);    guess_coarse = zero;
     blockProject(src_coarse,src,subspace);    
     for (int i=0;i<N;i++) {
       const CoarseField & tmp = evec_coarse[i];
       axpy(guess_coarse,TensorRemove(innerProduct(tmp,src_coarse)) / eval_coarse[i],tmp,guess_coarse);
     }
     blockPromote(guess_coarse,guess,subspace);
-    guess.Checkerboard() = src.Checkerboard();
+    guess.checkerboard = src.checkerboard;
   };
 };
 

Grid/algorithms/iterative/FlexibleCommunicationAvoidingGeneralisedMinimalResidual.h

@@ -1,258 +0,0 @@
-/*************************************************************************************
-
-Grid physics library, www.github.com/paboyle/Grid
-
-Source file: ./lib/algorithms/iterative/FlexibleCommunicationAvoidingGeneralisedMinimalResidual.h
-
-Copyright (C) 2015
-
-Author: Daniel Richtmann <daniel.richtmann@ur.de>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-See the full license in the file "LICENSE" in the top level distribution
-directory
-*************************************************************************************/
-/*  END LEGAL */
-#ifndef GRID_FLEXIBLE_COMMUNICATION_AVOIDING_GENERALISED_MINIMAL_RESIDUAL_H
-#define GRID_FLEXIBLE_COMMUNICATION_AVOIDING_GENERALISED_MINIMAL_RESIDUAL_H
-
-namespace Grid {
-
-template<class Field>
-class FlexibleCommunicationAvoidingGeneralisedMinimalResidual : public OperatorFunction<Field> {
- public:
-  using OperatorFunction<Field>::operator();
-
-  bool ErrorOnNoConverge; // Throw an assert when FCAGMRES fails to converge,
-                          // defaults to true
-
-  RealD   Tolerance;
-
-  Integer MaxIterations;
-  Integer RestartLength;
-  Integer MaxNumberOfRestarts;
-  Integer IterationCount; // Number of iterations the FCAGMRES took to finish,
-                          // filled in upon completion
-
-  GridStopWatch MatrixTimer;
-  GridStopWatch PrecTimer;
-  GridStopWatch LinalgTimer;
-  GridStopWatch QrTimer;
-  GridStopWatch CompSolutionTimer;
-
-  Eigen::MatrixXcd H;
-
-  std::vector<ComplexD> y;
-  std::vector<ComplexD> gamma;
-  std::vector<ComplexD> c;
-  std::vector<ComplexD> s;
-
-  LinearFunction<Field> &Preconditioner;
-
-  FlexibleCommunicationAvoidingGeneralisedMinimalResidual(RealD   tol,
-                                                          Integer maxit,
-                                                          LinearFunction<Field> &Prec,
-                                                          Integer restart_length,
-                                                          bool    err_on_no_conv = true)
-      : Tolerance(tol)
-      , MaxIterations(maxit)
-      , RestartLength(restart_length)
-      , MaxNumberOfRestarts(MaxIterations/RestartLength + ((MaxIterations%RestartLength == 0) ? 0 : 1))
-      , ErrorOnNoConverge(err_on_no_conv)
-      , H(Eigen::MatrixXcd::Zero(RestartLength, RestartLength + 1)) // sizes taken from DD-αAMG code base
-      , y(RestartLength + 1, 0.)
-      , gamma(RestartLength + 1, 0.)
-      , c(RestartLength + 1, 0.)
-      , s(RestartLength + 1, 0.)
-      , Preconditioner(Prec) {};
-
-  void operator()(LinearOperatorBase<Field> &LinOp, const Field &src, Field &psi) {
-
-    std::cout << GridLogWarning << "This algorithm currently doesn't differ from regular FGMRES" << std::endl;
-
-    psi.Checkerboard() = src.Checkerboard();
-    conformable(psi, src);
-
-    RealD guess = norm2(psi);
-    assert(std::isnan(guess) == 0);
-
-    RealD cp;
-    RealD ssq = norm2(src);
-    RealD rsq = Tolerance * Tolerance * ssq;
-
-    Field r(src.Grid());
-
-    std::cout << std::setprecision(4) << std::scientific;
-    std::cout << GridLogIterative << "FlexibleCommunicationAvoidingGeneralisedMinimalResidual: guess " << guess << std::endl;
-    std::cout << GridLogIterative << "FlexibleCommunicationAvoidingGeneralisedMinimalResidual:   src " << ssq   << std::endl;
-
-    PrecTimer.Reset();
-    MatrixTimer.Reset();
-    LinalgTimer.Reset();
-    QrTimer.Reset();
-    CompSolutionTimer.Reset();
-
-    GridStopWatch SolverTimer;
-    SolverTimer.Start();
-
-    IterationCount = 0;
-
-    for (int k=0; k<MaxNumberOfRestarts; k++) {
-
-      cp = outerLoopBody(LinOp, src, psi, rsq);
-
-      // Stopping condition
-      if (cp <= rsq) {
-
-        SolverTimer.Stop();
-
-        LinOp.Op(psi,r);
-        axpy(r,-1.0,src,r);
-
-        RealD srcnorm       = sqrt(ssq);
-        RealD resnorm       = sqrt(norm2(r));
-        RealD true_residual = resnorm / srcnorm;
-
-        std::cout << GridLogMessage        << "FlexibleCommunicationAvoidingGeneralisedMinimalResidual: Converged on iteration " << IterationCount
-                  << " computed residual " << sqrt(cp / ssq)
-                  << " true residual "     << true_residual
-                  << " target "            << Tolerance << std::endl;
-
-        std::cout << GridLogMessage << "FCAGMRES Time elapsed: Total   " <<       SolverTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "FCAGMRES Time elapsed: Precon  " <<         PrecTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "FCAGMRES Time elapsed: Matrix  " <<       MatrixTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "FCAGMRES Time elapsed: Linalg  " <<       LinalgTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "FCAGMRES Time elapsed: QR      " <<           QrTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "FCAGMRES Time elapsed: CompSol " << CompSolutionTimer.Elapsed() << std::endl;
-        return;
-      }
-    }
-
-    std::cout << GridLogMessage << "FlexibleCommunicationAvoidingGeneralisedMinimalResidual did NOT converge" << std::endl;
-
-    if (ErrorOnNoConverge)
-      assert(0);
-  }
-
-  RealD outerLoopBody(LinearOperatorBase<Field> &LinOp, const Field &src, Field &psi, RealD rsq) {
-
-    RealD cp = 0;
-
-    Field w(src.Grid());
-    Field r(src.Grid());
-
-    // these should probably be made class members so that they are only allocated once, not in every restart
-    std::vector<Field> v(RestartLength + 1, src.Grid()); for (auto &elem : v) elem = Zero();
-    std::vector<Field> z(RestartLength + 1, src.Grid()); for (auto &elem : z) elem = Zero();
-
-    MatrixTimer.Start();
-    LinOp.Op(psi, w);
-    MatrixTimer.Stop();
-
-    LinalgTimer.Start();
-    r = src - w;
-
-    gamma[0] = sqrt(norm2(r));
-
-    v[0] = (1. / gamma[0]) * r;
-    LinalgTimer.Stop();
-
-    for (int i=0; i<RestartLength; i++) {
-
-      IterationCount++;
-
-      arnoldiStep(LinOp, v, z, w, i);
-
-      qrUpdate(i);
-
-      cp = norm(gamma[i+1]);
-
-      std::cout << GridLogIterative << "FlexibleCommunicationAvoidingGeneralisedMinimalResidual: Iteration " << IterationCount
-                << " residual " << cp << " target " << rsq << std::endl;
-
-      if ((i == RestartLength - 1) || (IterationCount == MaxIterations) || (cp <= rsq)) {
-
-        computeSolution(z, psi, i);
-
-        return cp;
-      }
-    }
-
-    assert(0); // Never reached
-    return cp;
-  }
-
-  void arnoldiStep(LinearOperatorBase<Field> &LinOp, std::vector<Field> &v, std::vector<Field> &z, Field &w, int iter) {
-
-    PrecTimer.Start();
-    Preconditioner(v[iter], z[iter]);
-    PrecTimer.Stop();
-
-    MatrixTimer.Start();
-    LinOp.Op(z[iter], w);
-    MatrixTimer.Stop();
-
-    LinalgTimer.Start();
-    for (int i = 0; i <= iter; ++i) {
-      H(iter, i) = innerProduct(v[i], w);
-      w = w - ComplexD(H(iter, i)) * v[i];
-    }
-
-    H(iter, iter + 1) = sqrt(norm2(w));
-    v[iter + 1] = ComplexD(1. / H(iter, iter + 1)) * w;
-    LinalgTimer.Stop();
-  }
-
-  void qrUpdate(int iter) {
-
-    QrTimer.Start();
-    for (int i = 0; i < iter ; ++i) {
-      auto tmp       = -s[i] * ComplexD(H(iter, i)) + c[i] * ComplexD(H(iter, i + 1));
-      H(iter, i)     = conjugate(c[i]) * ComplexD(H(iter, i)) + conjugate(s[i]) * ComplexD(H(iter, i + 1));
-      H(iter, i + 1) = tmp;
-    }
-
-    // Compute new Givens Rotation
-    auto nu = sqrt(std::norm(H(iter, iter)) + std::norm(H(iter, iter + 1)));
-    c[iter]     = H(iter, iter) / nu;
-    s[iter]     = H(iter, iter + 1) / nu;
-
-    // Apply new Givens rotation
-    H(iter, iter)     = nu;
-    H(iter, iter + 1) = 0.;
-
-    gamma[iter + 1] = -s[iter] * gamma[iter];
-    gamma[iter]     = conjugate(c[iter]) * gamma[iter];
-    QrTimer.Stop();
-  }
-
-  void computeSolution(std::vector<Field> const &z, Field &psi, int iter) {
-
-    CompSolutionTimer.Start();
-    for (int i = iter; i >= 0; i--) {
-      y[i] = gamma[i];
-      for (int k = i + 1; k <= iter; k++)
-        y[i] = y[i] - ComplexD(H(k, i)) * y[k];
-      y[i] = y[i] / ComplexD(H(i, i));
-    }
-
-    for (int i = 0; i <= iter; i++)
-      psi = psi + z[i] * y[i];
-    CompSolutionTimer.Stop();
-  }
-};
-}
-#endif

Grid/algorithms/iterative/FlexibleGeneralisedMinimalResidual.h

@@ -1,256 +0,0 @@
-/*************************************************************************************
-
-Grid physics library, www.github.com/paboyle/Grid
-
-Source file: ./lib/algorithms/iterative/FlexibleGeneralisedMinimalResidual.h
-
-Copyright (C) 2015
-
-Author: Daniel Richtmann <daniel.richtmann@ur.de>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-See the full license in the file "LICENSE" in the top level distribution
-directory
-*************************************************************************************/
-/*  END LEGAL */
-#ifndef GRID_FLEXIBLE_GENERALISED_MINIMAL_RESIDUAL_H
-#define GRID_FLEXIBLE_GENERALISED_MINIMAL_RESIDUAL_H
-
-namespace Grid {
-
-template<class Field>
-class FlexibleGeneralisedMinimalResidual : public OperatorFunction<Field> {
- public:
-  using OperatorFunction<Field>::operator();
-
-  bool ErrorOnNoConverge; // Throw an assert when FGMRES fails to converge,
-                          // defaults to true
-
-  RealD   Tolerance;
-
-  Integer MaxIterations;
-  Integer RestartLength;
-  Integer MaxNumberOfRestarts;
-  Integer IterationCount; // Number of iterations the FGMRES took to finish,
-                          // filled in upon completion
-
-  GridStopWatch MatrixTimer;
-  GridStopWatch PrecTimer;
-  GridStopWatch LinalgTimer;
-  GridStopWatch QrTimer;
-  GridStopWatch CompSolutionTimer;
-
-  Eigen::MatrixXcd H;
-
-  std::vector<ComplexD> y;
-  std::vector<ComplexD> gamma;
-  std::vector<ComplexD> c;
-  std::vector<ComplexD> s;
-
-  LinearFunction<Field> &Preconditioner;
-
-  FlexibleGeneralisedMinimalResidual(RealD   tol,
-                                     Integer maxit,
-                                     LinearFunction<Field> &Prec,
-                                     Integer restart_length,
-                                     bool    err_on_no_conv = true)
-      : Tolerance(tol)
-      , MaxIterations(maxit)
-      , RestartLength(restart_length)
-      , MaxNumberOfRestarts(MaxIterations/RestartLength + ((MaxIterations%RestartLength == 0) ? 0 : 1))
-      , ErrorOnNoConverge(err_on_no_conv)
-      , H(Eigen::MatrixXcd::Zero(RestartLength, RestartLength + 1)) // sizes taken from DD-αAMG code base
-      , y(RestartLength + 1, 0.)
-      , gamma(RestartLength + 1, 0.)
-      , c(RestartLength + 1, 0.)
-      , s(RestartLength + 1, 0.)
-      , Preconditioner(Prec) {};
-
-  void operator()(LinearOperatorBase<Field> &LinOp, const Field &src, Field &psi) {
-
-    psi.Checkerboard() = src.Checkerboard();
-    conformable(psi, src);
-
-    RealD guess = norm2(psi);
-    assert(std::isnan(guess) == 0);
-
-    RealD cp;
-    RealD ssq = norm2(src);
-    RealD rsq = Tolerance * Tolerance * ssq;
-
-    Field r(src.Grid());
-
-    std::cout << std::setprecision(4) << std::scientific;
-    std::cout << GridLogIterative << "FlexibleGeneralisedMinimalResidual: guess " << guess << std::endl;
-    std::cout << GridLogIterative << "FlexibleGeneralisedMinimalResidual:   src " << ssq   << std::endl;
-
-    PrecTimer.Reset();
-    MatrixTimer.Reset();
-    LinalgTimer.Reset();
-    QrTimer.Reset();
-    CompSolutionTimer.Reset();
-
-    GridStopWatch SolverTimer;
-    SolverTimer.Start();
-
-    IterationCount = 0;
-
-    for (int k=0; k<MaxNumberOfRestarts; k++) {
-
-      cp = outerLoopBody(LinOp, src, psi, rsq);
-
-      // Stopping condition
-      if (cp <= rsq) {
-
-        SolverTimer.Stop();
-
-        LinOp.Op(psi,r);
-        axpy(r,-1.0,src,r);
-
-        RealD srcnorm       = sqrt(ssq);
-        RealD resnorm       = sqrt(norm2(r));
-        RealD true_residual = resnorm / srcnorm;
-
-        std::cout << GridLogMessage        << "FlexibleGeneralisedMinimalResidual: Converged on iteration " << IterationCount
-                  << " computed residual " << sqrt(cp / ssq)
-                  << " true residual "     << true_residual
-                  << " target "            << Tolerance << std::endl;
-
-        std::cout << GridLogMessage << "FGMRES Time elapsed: Total   " <<       SolverTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "FGMRES Time elapsed: Precon  " <<         PrecTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "FGMRES Time elapsed: Matrix  " <<       MatrixTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "FGMRES Time elapsed: Linalg  " <<       LinalgTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "FGMRES Time elapsed: QR      " <<           QrTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "FGMRES Time elapsed: CompSol " << CompSolutionTimer.Elapsed() << std::endl;
-        return;
-      }
-    }
-
-    std::cout << GridLogMessage << "FlexibleGeneralisedMinimalResidual did NOT converge" << std::endl;
-
-    if (ErrorOnNoConverge)
-      assert(0);
-  }
-
-  RealD outerLoopBody(LinearOperatorBase<Field> &LinOp, const Field &src, Field &psi, RealD rsq) {
-
-    RealD cp = 0;
-
-    Field w(src.Grid());
-    Field r(src.Grid());
-
-    // these should probably be made class members so that they are only allocated once, not in every restart
-    std::vector<Field> v(RestartLength + 1, src.Grid()); for (auto &elem : v) elem = Zero();
-    std::vector<Field> z(RestartLength + 1, src.Grid()); for (auto &elem : z) elem = Zero();
-
-    MatrixTimer.Start();
-    LinOp.Op(psi, w);
-    MatrixTimer.Stop();
-
-    LinalgTimer.Start();
-    r = src - w;
-
-    gamma[0] = sqrt(norm2(r));
-
-    v[0] = (1. / gamma[0]) * r;
-    LinalgTimer.Stop();
-
-    for (int i=0; i<RestartLength; i++) {
-
-      IterationCount++;
-
-      arnoldiStep(LinOp, v, z, w, i);
-
-      qrUpdate(i);
-
-      cp = norm(gamma[i+1]);
-
-      std::cout << GridLogIterative << "FlexibleGeneralisedMinimalResidual: Iteration " << IterationCount
-                << " residual " << cp << " target " << rsq << std::endl;
-
-      if ((i == RestartLength - 1) || (IterationCount == MaxIterations) || (cp <= rsq)) {
-
-        computeSolution(z, psi, i);
-
-        return cp;
-      }
-    }
-
-    assert(0); // Never reached
-    return cp;
-  }
-
-  void arnoldiStep(LinearOperatorBase<Field> &LinOp, std::vector<Field> &v, std::vector<Field> &z, Field &w, int iter) {
-
-    PrecTimer.Start();
-    Preconditioner(v[iter], z[iter]);
-    PrecTimer.Stop();
-
-    MatrixTimer.Start();
-    LinOp.Op(z[iter], w);
-    MatrixTimer.Stop();
-
-    LinalgTimer.Start();
-    for (int i = 0; i <= iter; ++i) {
-      H(iter, i) = innerProduct(v[i], w);
-      w = w - ComplexD(H(iter, i)) * v[i];
-    }
-
-    H(iter, iter + 1) = sqrt(norm2(w));
-    v[iter + 1] = ComplexD(1. / H(iter, iter + 1)) * w;
-    LinalgTimer.Stop();
-  }
-
-  void qrUpdate(int iter) {
-
-    QrTimer.Start();
-    for (int i = 0; i < iter ; ++i) {
-      auto tmp       = -s[i] * ComplexD(H(iter, i)) + c[i] * ComplexD(H(iter, i + 1));
-      H(iter, i)     = conjugate(c[i]) * ComplexD(H(iter, i)) + conjugate(s[i]) * ComplexD(H(iter, i + 1));
-      H(iter, i + 1) = tmp;
-    }
-
-    // Compute new Givens Rotation
-    auto nu = sqrt(std::norm(H(iter, iter)) + std::norm(H(iter, iter + 1)));
-    c[iter]     = H(iter, iter) / nu;
-    s[iter]     = H(iter, iter + 1) / nu;
-
-    // Apply new Givens rotation
-    H(iter, iter)     = nu;
-    H(iter, iter + 1) = 0.;
-
-    gamma[iter + 1] = -s[iter] * gamma[iter];
-    gamma[iter]     = conjugate(c[iter]) * gamma[iter];
-    QrTimer.Stop();
-  }
-
-  void computeSolution(std::vector<Field> const &z, Field &psi, int iter) {
-
-    CompSolutionTimer.Start();
-    for (int i = iter; i >= 0; i--) {
-      y[i] = gamma[i];
-      for (int k = i + 1; k <= iter; k++)
-        y[i] = y[i] - ComplexD(H(k, i)) * y[k];
-      y[i] = y[i] / ComplexD(H(i, i));
-    }
-
-    for (int i = 0; i <= iter; i++)
-      psi = psi + z[i] * y[i];
-    CompSolutionTimer.Stop();
-  }
-};
-}
-#endif

Grid/algorithms/iterative/GeneralisedMinimalResidual.h

@@ -1,244 +0,0 @@
-/*************************************************************************************
-
-Grid physics library, www.github.com/paboyle/Grid
-
-Source file: ./lib/algorithms/iterative/GeneralisedMinimalResidual.h
-
-Copyright (C) 2015
-
-Author: Daniel Richtmann <daniel.richtmann@ur.de>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-See the full license in the file "LICENSE" in the top level distribution
-directory
-*************************************************************************************/
-/*  END LEGAL */
-#ifndef GRID_GENERALISED_MINIMAL_RESIDUAL_H
-#define GRID_GENERALISED_MINIMAL_RESIDUAL_H
-
-namespace Grid {
-
-template<class Field>
-class GeneralisedMinimalResidual : public OperatorFunction<Field> {
- public:
-  using OperatorFunction<Field>::operator();
-
-  bool ErrorOnNoConverge; // Throw an assert when GMRES fails to converge,
-                          // defaults to true
-
-  RealD   Tolerance;
-
-  Integer MaxIterations;
-  Integer RestartLength;
-  Integer MaxNumberOfRestarts;
-  Integer IterationCount; // Number of iterations the GMRES took to finish,
-                          // filled in upon completion
-
-  GridStopWatch MatrixTimer;
-  GridStopWatch LinalgTimer;
-  GridStopWatch QrTimer;
-  GridStopWatch CompSolutionTimer;
-
-  Eigen::MatrixXcd H;
-
-  std::vector<ComplexD> y;
-  std::vector<ComplexD> gamma;
-  std::vector<ComplexD> c;
-  std::vector<ComplexD> s;
-
-  GeneralisedMinimalResidual(RealD   tol,
-                             Integer maxit,
-                             Integer restart_length,
-                             bool    err_on_no_conv = true)
-      : Tolerance(tol)
-      , MaxIterations(maxit)
-      , RestartLength(restart_length)
-      , MaxNumberOfRestarts(MaxIterations/RestartLength + ((MaxIterations%RestartLength == 0) ? 0 : 1))
-      , ErrorOnNoConverge(err_on_no_conv)
-      , H(Eigen::MatrixXcd::Zero(RestartLength, RestartLength + 1)) // sizes taken from DD-αAMG code base
-      , y(RestartLength + 1, 0.)
-      , gamma(RestartLength + 1, 0.)
-      , c(RestartLength + 1, 0.)
-      , s(RestartLength + 1, 0.) {};
-
-  void operator()(LinearOperatorBase<Field> &LinOp, const Field &src, Field &psi) {
-
-    psi.Checkerboard() = src.Checkerboard();
-    conformable(psi, src);
-
-    RealD guess = norm2(psi);
-    assert(std::isnan(guess) == 0);
-
-    RealD cp;
-    RealD ssq = norm2(src);
-    RealD rsq = Tolerance * Tolerance * ssq;
-
-    Field r(src.Grid());
-
-    std::cout << std::setprecision(4) << std::scientific;
-    std::cout << GridLogIterative << "GeneralisedMinimalResidual: guess " << guess << std::endl;
-    std::cout << GridLogIterative << "GeneralisedMinimalResidual:   src " << ssq   << std::endl;
-
-    MatrixTimer.Reset();
-    LinalgTimer.Reset();
-    QrTimer.Reset();
-    CompSolutionTimer.Reset();
-
-    GridStopWatch SolverTimer;
-    SolverTimer.Start();
-
-    IterationCount = 0;
-
-    for (int k=0; k<MaxNumberOfRestarts; k++) {
-
-      cp = outerLoopBody(LinOp, src, psi, rsq);
-
-      // Stopping condition
-      if (cp <= rsq) {
-
-        SolverTimer.Stop();
-
-        LinOp.Op(psi,r);
-        axpy(r,-1.0,src,r);
-
-        RealD srcnorm       = sqrt(ssq);
-        RealD resnorm       = sqrt(norm2(r));
-        RealD true_residual = resnorm / srcnorm;
-
-        std::cout << GridLogMessage        << "GeneralisedMinimalResidual: Converged on iteration " << IterationCount
-                  << " computed residual " << sqrt(cp / ssq)
-                  << " true residual "     << true_residual
-                  << " target "            << Tolerance << std::endl;
-
-        std::cout << GridLogMessage << "GMRES Time elapsed: Total   " <<       SolverTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "GMRES Time elapsed: Matrix  " <<       MatrixTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "GMRES Time elapsed: Linalg  " <<       LinalgTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "GMRES Time elapsed: QR      " <<           QrTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "GMRES Time elapsed: CompSol " << CompSolutionTimer.Elapsed() << std::endl;
-        return;
-      }
-    }
-
-    std::cout << GridLogMessage << "GeneralisedMinimalResidual did NOT converge" << std::endl;
-
-    if (ErrorOnNoConverge)
-      assert(0);
-  }
-
-  RealD outerLoopBody(LinearOperatorBase<Field> &LinOp, const Field &src, Field &psi, RealD rsq) {
-
-    RealD cp = 0;
-
-    Field w(src.Grid());
-    Field r(src.Grid());
-
-    // this should probably be made a class member so that it is only allocated once, not in every restart
-    std::vector<Field> v(RestartLength + 1, src.Grid()); for (auto &elem : v) elem = Zero();
-
-    MatrixTimer.Start();
-    LinOp.Op(psi, w);
-    MatrixTimer.Stop();
-
-    LinalgTimer.Start();
-    r = src - w;
-
-    gamma[0] = sqrt(norm2(r));
-
-    v[0] = (1. / gamma[0]) * r;
-    LinalgTimer.Stop();
-
-    for (int i=0; i<RestartLength; i++) {
-
-      IterationCount++;
-
-      arnoldiStep(LinOp, v, w, i);
-
-      qrUpdate(i);
-
-      cp = norm(gamma[i+1]);
-
-      std::cout << GridLogIterative << "GeneralisedMinimalResidual: Iteration " << IterationCount
-                << " residual " << cp << " target " << rsq << std::endl;
-
-      if ((i == RestartLength - 1) || (IterationCount == MaxIterations) || (cp <= rsq)) {
-
-        computeSolution(v, psi, i);
-
-        return cp;
-      }
-    }
-
-    assert(0); // Never reached
-    return cp;
-  }
-
-  void arnoldiStep(LinearOperatorBase<Field> &LinOp, std::vector<Field> &v, Field &w, int iter) {
-
-    MatrixTimer.Start();
-    LinOp.Op(v[iter], w);
-    MatrixTimer.Stop();
-
-    LinalgTimer.Start();
-    for (int i = 0; i <= iter; ++i) {
-      H(iter, i) = innerProduct(v[i], w);
-      w = w - ComplexD(H(iter, i)) * v[i];
-    }
-
-    H(iter, iter + 1) = sqrt(norm2(w));
-    v[iter + 1] = ComplexD(1. / H(iter, iter + 1)) * w;
-    LinalgTimer.Stop();
-  }
-
-  void qrUpdate(int iter) {
-
-    QrTimer.Start();
-    for (int i = 0; i < iter ; ++i) {
-      auto tmp       = -s[i] * ComplexD(H(iter, i)) + c[i] * ComplexD(H(iter, i + 1));
-      H(iter, i)     = conjugate(c[i]) * ComplexD(H(iter, i)) + conjugate(s[i]) * ComplexD(H(iter, i + 1));
-      H(iter, i + 1) = tmp;
-    }
-
-    // Compute new Givens Rotation
-    auto nu = sqrt(std::norm(H(iter, iter)) + std::norm(H(iter, iter + 1)));
-    c[iter]     = H(iter, iter) / nu;
-    s[iter]     = H(iter, iter + 1) / nu;
-
-    // Apply new Givens rotation
-    H(iter, iter)     = nu;
-    H(iter, iter + 1) = 0.;
-
-    gamma[iter + 1] = -s[iter] * gamma[iter];
-    gamma[iter]     = conjugate(c[iter]) * gamma[iter];
-    QrTimer.Stop();
-  }
-
-  void computeSolution(std::vector<Field> const &v, Field &psi, int iter) {
-
-    CompSolutionTimer.Start();
-    for (int i = iter; i >= 0; i--) {
-      y[i] = gamma[i];
-      for (int k = i + 1; k <= iter; k++)
-        y[i] = y[i] - ComplexD(H(k, i)) * y[k];
-      y[i] = y[i] / ComplexD(H(i, i));
-    }
-
-    for (int i = 0; i <= iter; i++)
-      psi = psi + v[i] * y[i];
-    CompSolutionTimer.Stop();
-  }
-};
-}
-#endif

Grid/algorithms/iterative/ImplicitlyRestartedLanczos.h

@@ -35,7 +35,120 @@ Author: Christoph Lehner <clehner@bnl.gov>
 //#include <zlib.h>
 #include <sys/stat.h>
 
-NAMESPACE_BEGIN(Grid); 
+namespace Grid { 
+
+  ////////////////////////////////////////////////////////
+  // Move following 100 LOC to lattice/Lattice_basis.h
+  ////////////////////////////////////////////////////////
+template<class Field>
+void basisOrthogonalize(std::vector<Field> &basis,Field &w,int k) 
+{
+  for(int j=0; j<k; ++j){
+    auto ip = innerProduct(basis[j],w);
+    w = w - ip*basis[j];
+  }
+}
+
+template<class Field>
+void basisRotate(std::vector<Field> &basis,Eigen::MatrixXd& Qt,int j0, int j1, int k0,int k1,int Nm) 
+{
+  typedef typename Field::vector_object vobj;
+  GridBase* grid = basis[0]._grid;
+      
+  parallel_region
+  {
+
+    std::vector < vobj , commAllocator<vobj> > B(Nm); // Thread private
+       
+    parallel_for_internal(int ss=0;ss < grid->oSites();ss++){
+      for(int j=j0; j<j1; ++j) B[j]=0.;
+      
+      for(int j=j0; j<j1; ++j){
+	for(int k=k0; k<k1; ++k){
+	  B[j] +=Qt(j,k) * basis[k]._odata[ss];
+	}
+      }
+      for(int j=j0; j<j1; ++j){
+	  basis[j]._odata[ss] = B[j];
+      }
+    }
+  }
+}
+
+// Extract a single rotated vector
+template<class Field>
+void basisRotateJ(Field &result,std::vector<Field> &basis,Eigen::MatrixXd& Qt,int j, int k0,int k1,int Nm) 
+{
+  typedef typename Field::vector_object vobj;
+  GridBase* grid = basis[0]._grid;
+
+  result.checkerboard = basis[0].checkerboard;
+  parallel_for(int ss=0;ss < grid->oSites();ss++){
+    vobj B = zero;
+    for(int k=k0; k<k1; ++k){
+      B +=Qt(j,k) * basis[k]._odata[ss];
+    }
+    result._odata[ss] = B;
+  }
+}
+
+template<class Field>
+void basisReorderInPlace(std::vector<Field> &_v,std::vector<RealD>& sort_vals, std::vector<int>& idx) 
+{
+  int vlen = idx.size();
+
+  assert(vlen>=1);
+  assert(vlen<=sort_vals.size());
+  assert(vlen<=_v.size());
+
+  for (size_t i=0;i<vlen;i++) {
+
+    if (idx[i] != i) {
+
+      //////////////////////////////////////
+      // idx[i] is a table of desired sources giving a permutation.
+      // Swap v[i] with v[idx[i]].
+      // Find  j>i for which _vnew[j] = _vold[i],
+      // track the move idx[j] => idx[i]
+      // track the move idx[i] => i
+      //////////////////////////////////////
+      size_t j;
+      for (j=i;j<idx.size();j++)
+	if (idx[j]==i)
+	  break;
+
+      assert(idx[i] > i);     assert(j!=idx.size());      assert(idx[j]==i);
+
+      std::swap(_v[i]._odata,_v[idx[i]]._odata); // should use vector move constructor, no data copy
+      std::swap(sort_vals[i],sort_vals[idx[i]]);
+
+      idx[j] = idx[i];
+      idx[i] = i;
+    }
+  }
+}
+
+inline std::vector<int> basisSortGetIndex(std::vector<RealD>& sort_vals) 
+{
+  std::vector<int> idx(sort_vals.size());
+  std::iota(idx.begin(), idx.end(), 0);
+
+  // sort indexes based on comparing values in v
+  std::sort(idx.begin(), idx.end(), [&sort_vals](int i1, int i2) {
+    return ::fabs(sort_vals[i1]) < ::fabs(sort_vals[i2]);
+  });
+  return idx;
+}
+
+template<class Field>
+void basisSortInPlace(std::vector<Field> & _v,std::vector<RealD>& sort_vals, bool reverse) 
+{
+  std::vector<int> idx = basisSortGetIndex(sort_vals);
+  if (reverse)
+    std::reverse(idx.begin(), idx.end());
+  
+  basisReorderInPlace(_v,sort_vals,idx);
+}
 
 /////////////////////////////////////////////////////////////
 // Implicitly restarted lanczos
@@ -146,7 +259,7 @@ public:
 			    RealD _eresid, // resid in lmdue deficit 
 			    int _MaxIter, // Max iterations
 			    RealD _betastp=0.0, // if beta(k) < betastp: converged
-			    int _MinRestart=0, int _orth_period = 1,
+			    int _MinRestart=1, int _orth_period = 1,
 			    IRLdiagonalisation _diagonalisation= IRLdiagonaliseWithEigen) :
     SimpleTester(HermOp), _PolyOp(PolyOp),      _HermOp(HermOp), _Tester(Tester),
     Nstop(_Nstop)  ,      Nk(_Nk),      Nm(_Nm),
@@ -162,7 +275,7 @@ public:
 			       RealD _eresid, // resid in lmdue deficit 
 			       int _MaxIter, // Max iterations
 			       RealD _betastp=0.0, // if beta(k) < betastp: converged
-			       int _MinRestart=0, int _orth_period = 1,
+			       int _MinRestart=1, int _orth_period = 1,
 			       IRLdiagonalisation _diagonalisation= IRLdiagonaliseWithEigen) :
     SimpleTester(HermOp),  _PolyOp(PolyOp),      _HermOp(HermOp), _Tester(SimpleTester),
     Nstop(_Nstop)  ,      Nk(_Nk),      Nm(_Nm),
@@ -176,7 +289,7 @@ public:
   template<typename T>  static RealD normalise(T& v) 
   {
     RealD nn = norm2(v);
-    nn = std::sqrt(nn);
+    nn = sqrt(nn);
     v = v * (1.0/nn);
     return nn;
   }
@@ -208,10 +321,10 @@ until convergence
 */
   void calc(std::vector<RealD>& eval, std::vector<Field>& evec,  const Field& src, int& Nconv, bool reverse=false)
   {
-    GridBase *grid = src.Grid();
-    assert(grid == evec[0].Grid());
+    GridBase *grid = src._grid;
+    assert(grid == evec[0]._grid);
     
-    //    GridLogIRL.TimingMode(1);
+    GridLogIRL.TimingMode(1);
     std::cout << GridLogIRL <<"**************************************************************************"<< std::endl;
     std::cout << GridLogIRL <<" ImplicitlyRestartedLanczos::calc() starting iteration 0 /  "<< MaxIter<< std::endl;
     std::cout << GridLogIRL <<"**************************************************************************"<< std::endl;
@@ -236,17 +349,14 @@ until convergence
     {
       auto src_n = src;
       auto tmp = src;
-      std::cout << GridLogIRL << " IRL source norm " << norm2(src) << std::endl;
       const int _MAX_ITER_IRL_MEVAPP_ = 50;
       for (int i=0;i<_MAX_ITER_IRL_MEVAPP_;i++) {
 	normalise(src_n);
 	_HermOp(src_n,tmp);
-	//	std::cout << GridLogMessage<< tmp<<std::endl; exit(0);
-	//	std::cout << GridLogIRL << " _HermOp " << norm2(tmp) << std::endl;
 	RealD vnum = real(innerProduct(src_n,tmp)); // HermOp.
 	RealD vden = norm2(src_n);
 	RealD na = vnum/vden;
-	if (fabs(evalMaxApprox/na - 1.0) < 0.0001)
+	if (fabs(evalMaxApprox/na - 1.0) < 0.05)
 	  i=_MAX_ITER_IRL_MEVAPP_;
 	evalMaxApprox = na;
 	std::cout << GridLogIRL << " Approximation of largest eigenvalue: " << evalMaxApprox << std::endl;
@@ -336,7 +446,7 @@ until convergence
       assert(k2<Nm);      assert(k2<Nm);      assert(k1>0);
 
       basisRotate(evec,Qt,k1-1,k2+1,0,Nm,Nm); /// big constraint on the basis
-      std::cout<<GridLogIRL <<"basisRotated  by Qt *"<<k1-1<<","<<k2+1<<")"<<std::endl;
+      std::cout<<GridLogIRL <<"basisRotated  by Qt"<<std::endl;
       
       ////////////////////////////////////////////////////
       // Compressed vector f and beta(k2)
@@ -344,7 +454,7 @@ until convergence
       f *= Qt(k2-1,Nm-1);
       f += lme[k2-1] * evec[k2];
       beta_k = norm2(f);
-      beta_k = std::sqrt(beta_k);
+      beta_k = sqrt(beta_k);
       std::cout<<GridLogIRL<<" beta(k) = "<<beta_k<<std::endl;
 	  
       RealD betar = 1.0/beta_k;
@@ -367,7 +477,7 @@ until convergence
 
 	std::cout << GridLogIRL << "Test convergence: rotate subset of vectors to test convergence " << std::endl;
 
-	Field B(grid); B.Checkerboard() = evec[0].Checkerboard();
+	Field B(grid); B.checkerboard = evec[0].checkerboard;
 
 	//  power of two search pattern;  not every evalue in eval2 is assessed.
 	int allconv =1;
@@ -405,7 +515,7 @@ until convergence
 	
   converged:
     {
-      Field B(grid); B.Checkerboard() = evec[0].Checkerboard();
+      Field B(grid); B.checkerboard = evec[0].checkerboard;
       basisRotate(evec,Qt,0,Nk,0,Nk,Nm);	    
       std::cout << GridLogIRL << " Rotated basis"<<std::endl;
       Nconv=0;
@@ -444,11 +554,11 @@ until convergence
 /* Saad PP. 195
 1. Choose an initial vector v1 of 2-norm unity. Set β1 ≡ 0, v0 ≡ 0
 2. For k = 1,2,...,m Do:
-3. wk:=Avk - b_k v_{k-1}      
-4. ak:=(wk,vk)       // 
-5. wk:=wk-akvk       // wk orthog vk 
-6. bk+1 := ||wk||_2. If b_k+1 = 0 then Stop
-7. vk+1 := wk/b_k+1
+3. wk:=Avk−βkv_{k−1}      
+4. αk:=(wk,vk)       // 
+5. wk:=wk−αkvk       // wk orthog vk 
+6. βk+1 := ∥wk∥2. If βk+1 = 0 then Stop
+7. vk+1 := wk/βk+1
 8. EndDo
  */
   void step(std::vector<RealD>& lmd,
@@ -456,7 +566,6 @@ until convergence
 	    std::vector<Field>& evec,
 	    Field& w,int Nm,int k)
   {
-    std::cout<<GridLogIRL << "Lanczos step " <<k<<std::endl;
     const RealD tiny = 1.0e-20;
     assert( k< Nm );
 
@@ -468,20 +577,20 @@ until convergence
 
     if(k>0) w -= lme[k-1] * evec[k-1];
 
-    ComplexD zalph = innerProduct(evec_k,w);
+    ComplexD zalph = innerProduct(evec_k,w); // 4. αk:=(wk,vk)
     RealD     alph = real(zalph);
 
-    w = w - alph * evec_k;
+    w = w - alph * evec_k;// 5. wk:=wk−αkvk
 
-    RealD beta = normalise(w); 
+    RealD beta = normalise(w); // 6. βk+1 := ∥wk∥2. If βk+1 = 0 then Stop
+    // 7. vk+1 := wk/βk+1
 
     lmd[k] = alph;
     lme[k] = beta;
 
-    if ( (k>0) && ( (k % orth_period) == 0 )) {
-      std::cout<<GridLogIRL << "Orthogonalising " <<k<<std::endl;
+    if (k>0 && k % orth_period == 0) {
       orthogonalize(w,evec,k); // orthonormalise
-      std::cout<<GridLogIRL << "Orthogonalised " <<k<<std::endl;
+      std::cout<<GridLogIRL << "Orthogonalised " <<std::endl;
     }
 
     if(k < Nm-1) evec[k+1] = w;
@@ -489,8 +598,6 @@ until convergence
     std::cout<<GridLogIRL << "alpha[" << k << "] = " << zalph << " beta[" << k << "] = "<<beta<<std::endl;
     if ( beta < tiny ) 
       std::cout<<GridLogIRL << " beta is tiny "<<beta<<std::endl;
-
-    std::cout<<GridLogIRL << "Lanczos step complete " <<k<<std::endl;
   }
 
   void diagonalize_Eigen(std::vector<RealD>& lmd, std::vector<RealD>& lme, 
@@ -700,7 +807,7 @@ void diagonalize_QR(std::vector<RealD>& lmd, std::vector<RealD>& lme,
     
     // determination of 2x2 leading submatrix
     RealD dsub = lmd[kmax-1]-lmd[kmax-2];
-    RealD dd = std::sqrt(dsub*dsub + 4.0*lme[kmax-2]*lme[kmax-2]);
+    RealD dd = sqrt(dsub*dsub + 4.0*lme[kmax-2]*lme[kmax-2]);
     RealD Dsh = 0.5*(lmd[kmax-2]+lmd[kmax-1] +dd*(dsub/fabs(dsub)));
     // (Dsh: shift)
     
@@ -731,6 +838,5 @@ void diagonalize_QR(std::vector<RealD>& lmd, std::vector<RealD>& lme,
   abort();
 }
 };
-
-NAMESPACE_END(Grid);
+}
 #endif

Grid/algorithms/iterative/LocalCoherenceLanczos.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,15 +24,16 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LOCAL_COHERENCE_IRL_H
 #define GRID_LOCAL_COHERENCE_IRL_H
 
-NAMESPACE_BEGIN(Grid); 
+namespace Grid { 
+
 
 struct LanczosParams : Serializable {
-public:
+ public:
   GRID_SERIALIZABLE_CLASS_MEMBERS(LanczosParams,
 				  ChebyParams, Cheby,/*Chebyshev*/
 				  int, Nstop,    /*Vecs in Lanczos must converge Nstop < Nk < Nm*/
@@ -45,7 +46,7 @@ public:
 };
 
 struct LocalCoherenceLanczosParams : Serializable {
-public:
+ public:
   GRID_SERIALIZABLE_CLASS_MEMBERS(LocalCoherenceLanczosParams,
 				  bool, saveEvecs,
 				  bool, doFine,
@@ -58,7 +59,7 @@ public:
 				  RealD        , coarse_relax_tol,
 				  std::vector<int>, blockSize,
 				  std::string, config,
-				  std::vector < ComplexD  >, omega,
+				  std::vector < std::complex<double>  >, omega,
 				  RealD, mass,
 				  RealD, M5);
 };
@@ -82,14 +83,14 @@ public:
   };
 
   void operator()(const CoarseField& in, CoarseField& out) {
-    GridBase *FineGrid = subspace[0].Grid();    
-    int   checkerboard = subspace[0].Checkerboard();
-
-    FineField fin (FineGrid);     fin.Checkerboard()= checkerboard;
-    FineField fout(FineGrid);   fout.Checkerboard() = checkerboard;
+    GridBase *FineGrid = subspace[0]._grid;    
+    int   checkerboard = subspace[0].checkerboard;
+      
+    FineField fin (FineGrid);     fin.checkerboard= checkerboard;
+    FineField fout(FineGrid);   fout.checkerboard = checkerboard;
 
     blockPromote(in,fin,subspace);       std::cout<<GridLogIRL<<"ProjectedHermop : Promote to fine"<<std::endl;
-    _Linop.HermOp(fin,fout);                   std::cout<<GridLogIRL<<"ProjectedHermop : HermOp (fine) "<<std::endl;
+    _Linop.HermOp(fin,fout);             std::cout<<GridLogIRL<<"ProjectedHermop : HermOp (fine) "<<std::endl;
     blockProject(out,fout,subspace);     std::cout<<GridLogIRL<<"ProjectedHermop : Project to coarse "<<std::endl;
   }
 };
@@ -116,12 +117,12 @@ public:
   {  };
 
   void operator()(const CoarseField& in, CoarseField& out) {
+    
+    GridBase *FineGrid = subspace[0]._grid;    
+    int   checkerboard = subspace[0].checkerboard;
 
-    GridBase *FineGrid = subspace[0].Grid();    
-    int   checkerboard = subspace[0].Checkerboard();
-
-    FineField fin (FineGrid); fin.Checkerboard() =checkerboard;
-    FineField fout(FineGrid);fout.Checkerboard() =checkerboard;
+    FineField fin (FineGrid); fin.checkerboard =checkerboard;
+    FineField fout(FineGrid);fout.checkerboard =checkerboard;
     
     blockPromote(in,fin,subspace);             std::cout<<GridLogIRL<<"ProjectedFunctionHermop : Promote to fine"<<std::endl;
     _poly(_Linop,fin,fout);                    std::cout<<GridLogIRL<<"ProjectedFunctionHermop : Poly "<<std::endl;
@@ -132,7 +133,7 @@ public:
 template<class Fobj,class CComplex,int nbasis>
 class ImplicitlyRestartedLanczosSmoothedTester  : public ImplicitlyRestartedLanczosTester<Lattice<iVector<CComplex,nbasis > > >
 {
-public:
+ public:
   typedef iVector<CComplex,nbasis >           CoarseSiteVector;
   typedef Lattice<CoarseSiteVector>           CoarseField;
   typedef Lattice<CComplex>   CoarseScalar; // used for inner products on fine field
@@ -141,7 +142,7 @@ public:
   LinearFunction<CoarseField> & _Poly;
   OperatorFunction<FineField>   & _smoother;
   LinearOperatorBase<FineField> &_Linop;
-  RealD                             _coarse_relax_tol;
+  RealD                          _coarse_relax_tol;
   std::vector<FineField>        &_subspace;
   
   ImplicitlyRestartedLanczosSmoothedTester(LinearFunction<CoarseField>   &Poly,
@@ -181,10 +182,10 @@ public:
   }
   int ReconstructEval(int j,RealD eresid,CoarseField &B, RealD &eval,RealD evalMaxApprox)
   {
-    GridBase *FineGrid = _subspace[0].Grid();    
-    int checkerboard   = _subspace[0].Checkerboard();
-    FineField fB(FineGrid);fB.Checkerboard() =checkerboard;
-    FineField fv(FineGrid);fv.Checkerboard() =checkerboard;
+    GridBase *FineGrid = _subspace[0]._grid;    
+    int checkerboard   = _subspace[0].checkerboard;
+    FineField fB(FineGrid);fB.checkerboard =checkerboard;
+    FineField fv(FineGrid);fv.checkerboard =checkerboard;
 
     blockPromote(B,fv,_subspace);  
     
@@ -304,11 +305,11 @@ public:
     int Nk = nbasis;
     subspace.resize(Nk,_FineGrid);
     subspace[0]=1.0;
-    subspace[0].Checkerboard()=_checkerboard;
+    subspace[0].checkerboard=_checkerboard;
     normalise(subspace[0]);
     PlainHermOp<FineField>    Op(_FineOp);
     for(int k=1;k<Nk;k++){
-      subspace[k].Checkerboard()=_checkerboard;
+      subspace[k].checkerboard=_checkerboard;
       Op(subspace[k-1],subspace[k]);
       normalise(subspace[k]);
     }
@@ -359,11 +360,7 @@ public:
 
     ImplicitlyRestartedLanczos<FineField> IRL(ChebyOp,Op,Nstop,Nk,Nm,resid,MaxIt,betastp,MinRes);
 
-    FineField src(_FineGrid); 
-    typedef typename FineField::scalar_type Scalar;
-    // src=1.0; 
-    src=Scalar(1.0); 
-    src.Checkerboard() = _checkerboard;
+    FineField src(_FineGrid); src=1.0; src.checkerboard = _checkerboard;
 
     int Nconv;
     IRL.calc(evals_fine,subspace,src,Nconv,false);
@@ -405,5 +402,5 @@ public:
   }
 };
 
-NAMESPACE_END(Grid);
+}
 #endif

Grid/algorithms/iterative/MinimalResidual.h

@@ -1,157 +0,0 @@
-/*************************************************************************************
-
-Grid physics library, www.github.com/paboyle/Grid
-
-Source file: ./lib/algorithms/iterative/MinimalResidual.h
-
-Copyright (C) 2015
-
-Author: Daniel Richtmann <daniel.richtmann@ur.de>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-See the full license in the file "LICENSE" in the top level distribution
-directory
-*************************************************************************************/
-/*  END LEGAL */
-#ifndef GRID_MINIMAL_RESIDUAL_H
-#define GRID_MINIMAL_RESIDUAL_H
-
-namespace Grid {
-
-template<class Field> class MinimalResidual : public OperatorFunction<Field> {
- public:
-  using OperatorFunction<Field>::operator();
-
-  bool ErrorOnNoConverge; // throw an assert when the MR fails to converge.
-                          // Defaults true.
-  RealD   Tolerance;
-  Integer MaxIterations;
-  RealD   overRelaxParam;
-  Integer IterationsToComplete; // Number of iterations the MR took to finish.
-                                // Filled in upon completion
-
-  MinimalResidual(RealD tol, Integer maxit, Real ovrelparam = 1.0, bool err_on_no_conv = true)
-    : Tolerance(tol), MaxIterations(maxit), overRelaxParam(ovrelparam), ErrorOnNoConverge(err_on_no_conv){};
-
-  void operator()(LinearOperatorBase<Field> &Linop, const Field &src, Field &psi) {
-
-    psi.Checkerboard() = src.Checkerboard();
-    conformable(psi, src);
-
-    ComplexD a, c;
-    RealD    d;
-
-    Field Mr(src);
-    Field r(src);
-
-    // Initial residual computation & set up
-    RealD guess = norm2(psi);
-    assert(std::isnan(guess) == 0);
-
-    RealD ssq = norm2(src);
-    RealD rsq = Tolerance * Tolerance * ssq;
-
-    Linop.Op(psi, Mr);
-
-    r = src - Mr;
-
-    RealD cp = norm2(r);
-
-    std::cout << std::setprecision(4) << std::scientific;
-    std::cout << GridLogIterative << "MinimalResidual: guess " << guess << std::endl;
-    std::cout << GridLogIterative << "MinimalResidual:   src " << ssq << std::endl;
-    std::cout << GridLogIterative << "MinimalResidual:  cp,r " << cp << std::endl;
-
-    if (cp <= rsq) {
-      return;
-    }
-
-    std::cout << GridLogIterative << "MinimalResidual: k=0 residual " << cp << " target " << rsq << std::endl;
-
-    GridStopWatch LinalgTimer;
-    GridStopWatch MatrixTimer;
-    GridStopWatch SolverTimer;
-
-    SolverTimer.Start();
-    int k;
-    for (k = 1; k <= MaxIterations; k++) {
-
-      MatrixTimer.Start();
-      Linop.Op(r, Mr);
-      MatrixTimer.Stop();
-
-      LinalgTimer.Start();
-
-      c = innerProduct(Mr, r);
-
-      d = norm2(Mr);
-
-      a = c / d;
-
-      a = a * overRelaxParam;
-
-      psi = psi + r * a;
-
-      r = r - Mr * a;
-
-      cp = norm2(r);
-
-      LinalgTimer.Stop();
-
-      std::cout << GridLogIterative << "MinimalResidual: Iteration " << k
-                << " residual " << cp << " target " << rsq << std::endl;
-      std::cout << GridLogDebug << "a = " << a << " c = " << c << " d = " << d << std::endl;
-
-      // Stopping condition
-      if (cp <= rsq) {
-        SolverTimer.Stop();
-
-        Linop.Op(psi, Mr);
-        r = src - Mr;
-
-        RealD srcnorm       = sqrt(ssq);
-        RealD resnorm       = sqrt(norm2(r));
-        RealD true_residual = resnorm / srcnorm;
-
-        std::cout << GridLogMessage        << "MinimalResidual Converged on iteration " << k
-                  << " computed residual " << sqrt(cp / ssq)
-                  << " true residual "     << true_residual
-                  << " target "            << Tolerance << std::endl;
-
-        std::cout << GridLogMessage << "MR Time elapsed: Total   " << SolverTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "MR Time elapsed: Matrix  " << MatrixTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "MR Time elapsed: Linalg  " << LinalgTimer.Elapsed() << std::endl;
-
-        if (ErrorOnNoConverge)
-          assert(true_residual / Tolerance < 10000.0);
-
-        IterationsToComplete = k;
-
-        return;
-      }
-    }
-
-    std::cout << GridLogMessage << "MinimalResidual did NOT converge"
-              << std::endl;
-
-    if (ErrorOnNoConverge)
-      assert(0);
-
-    IterationsToComplete = k;
-  }
-};
-} // namespace Grid
-#endif

Grid/algorithms/iterative/MixedPrecisionFlexibleGeneralisedMinimalResidual.h

@@ -1,276 +0,0 @@
-/*************************************************************************************
-
-Grid physics library, www.github.com/paboyle/Grid
-
-Source file: ./lib/algorithms/iterative/MixedPrecisionFlexibleGeneralisedMinimalResidual.h
-
-Copyright (C) 2015
-
-Author: Daniel Richtmann <daniel.richtmann@ur.de>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-See the full license in the file "LICENSE" in the top level distribution
-directory
-*************************************************************************************/
-/*  END LEGAL */
-#ifndef GRID_MIXED_PRECISION_FLEXIBLE_GENERALISED_MINIMAL_RESIDUAL_H
-#define GRID_MIXED_PRECISION_FLEXIBLE_GENERALISED_MINIMAL_RESIDUAL_H
-
-namespace Grid {
-
-template<class FieldD, class FieldF, typename std::enable_if<getPrecision<FieldD>::value == 2, int>::type = 0, typename std::enable_if< getPrecision<FieldF>::value == 1, int>::type = 0>
-class MixedPrecisionFlexibleGeneralisedMinimalResidual : public OperatorFunction<FieldD> {
- public:
-
-  using OperatorFunction<FieldD>::operator();
-
-  bool ErrorOnNoConverge; // Throw an assert when MPFGMRES fails to converge,
-                          // defaults to true
-
-  RealD   Tolerance;
-
-  Integer MaxIterations;
-  Integer RestartLength;
-  Integer MaxNumberOfRestarts;
-  Integer IterationCount; // Number of iterations the MPFGMRES took to finish,
-                          // filled in upon completion
-
-  GridStopWatch MatrixTimer;
-  GridStopWatch PrecTimer;
-  GridStopWatch LinalgTimer;
-  GridStopWatch QrTimer;
-  GridStopWatch CompSolutionTimer;
-  GridStopWatch ChangePrecTimer;
-
-  Eigen::MatrixXcd H;
-
-  std::vector<ComplexD> y;
-  std::vector<ComplexD> gamma;
-  std::vector<ComplexD> c;
-  std::vector<ComplexD> s;
-
-  GridBase* SinglePrecGrid;
-
-  LinearFunction<FieldF> &Preconditioner;
-
-  MixedPrecisionFlexibleGeneralisedMinimalResidual(RealD   tol,
-                                                   Integer maxit,
-                                                   GridBase * sp_grid,
-                                                   LinearFunction<FieldF> &Prec,
-                                                   Integer restart_length,
-                                                   bool    err_on_no_conv = true)
-      : Tolerance(tol)
-      , MaxIterations(maxit)
-      , RestartLength(restart_length)
-      , MaxNumberOfRestarts(MaxIterations/RestartLength + ((MaxIterations%RestartLength == 0) ? 0 : 1))
-      , ErrorOnNoConverge(err_on_no_conv)
-      , H(Eigen::MatrixXcd::Zero(RestartLength, RestartLength + 1)) // sizes taken from DD-αAMG code base
-      , y(RestartLength + 1, 0.)
-      , gamma(RestartLength + 1, 0.)
-      , c(RestartLength + 1, 0.)
-      , s(RestartLength + 1, 0.)
-      , SinglePrecGrid(sp_grid)
-      , Preconditioner(Prec) {};
-
-  void operator()(LinearOperatorBase<FieldD> &LinOp, const FieldD &src, FieldD &psi) {
-
-    psi.Checkerboard() = src.Checkerboard();
-    conformable(psi, src);
-
-    RealD guess = norm2(psi);
-    assert(std::isnan(guess) == 0);
-
-    RealD cp;
-    RealD ssq = norm2(src);
-    RealD rsq = Tolerance * Tolerance * ssq;
-
-    FieldD r(src.Grid());
-
-    std::cout << std::setprecision(4) << std::scientific;
-    std::cout << GridLogIterative << "MPFGMRES: guess " << guess << std::endl;
-    std::cout << GridLogIterative << "MPFGMRES:   src " << ssq   << std::endl;
-
-    PrecTimer.Reset();
-    MatrixTimer.Reset();
-    LinalgTimer.Reset();
-    QrTimer.Reset();
-    CompSolutionTimer.Reset();
-    ChangePrecTimer.Reset();
-
-    GridStopWatch SolverTimer;
-    SolverTimer.Start();
-
-    IterationCount = 0;
-
-    for (int k=0; k<MaxNumberOfRestarts; k++) {
-
-      cp = outerLoopBody(LinOp, src, psi, rsq);
-
-      // Stopping condition
-      if (cp <= rsq) {
-
-        SolverTimer.Stop();
-
-        LinOp.Op(psi,r);
-        axpy(r,-1.0,src,r);
-
-        RealD srcnorm       = sqrt(ssq);
-        RealD resnorm       = sqrt(norm2(r));
-        RealD true_residual = resnorm / srcnorm;
-
-        std::cout << GridLogMessage        << "MPFGMRES: Converged on iteration " << IterationCount
-                  << " computed residual " << sqrt(cp / ssq)
-                  << " true residual "     << true_residual
-                  << " target "            << Tolerance << std::endl;
-
-        std::cout << GridLogMessage << "MPFGMRES Time elapsed: Total      " <<       SolverTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "MPFGMRES Time elapsed: Precon     " <<         PrecTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "MPFGMRES Time elapsed: Matrix     " <<       MatrixTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "MPFGMRES Time elapsed: Linalg     " <<       LinalgTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "MPFGMRES Time elapsed: QR         " <<           QrTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "MPFGMRES Time elapsed: CompSol    " << CompSolutionTimer.Elapsed() << std::endl;
-        std::cout << GridLogMessage << "MPFGMRES Time elapsed: PrecChange " <<   ChangePrecTimer.Elapsed() << std::endl;
-        return;
-      }
-    }
-
-    std::cout << GridLogMessage << "MPFGMRES did NOT converge" << std::endl;
-
-    if (ErrorOnNoConverge)
-      assert(0);
-  }
-
-  RealD outerLoopBody(LinearOperatorBase<FieldD> &LinOp, const FieldD &src, FieldD &psi, RealD rsq) {
-
-    RealD cp = 0;
-
-    FieldD w(src.Grid());
-    FieldD r(src.Grid());
-
-    // these should probably be made class members so that they are only allocated once, not in every restart
-    std::vector<FieldD> v(RestartLength + 1, src.Grid()); for (auto &elem : v) elem = Zero();
-    std::vector<FieldD> z(RestartLength + 1, src.Grid()); for (auto &elem : z) elem = Zero();
-
-    MatrixTimer.Start();
-    LinOp.Op(psi, w);
-    MatrixTimer.Stop();
-
-    LinalgTimer.Start();
-    r = src - w;
-
-    gamma[0] = sqrt(norm2(r));
-
-    v[0] = (1. / gamma[0]) * r;
-    LinalgTimer.Stop();
-
-    for (int i=0; i<RestartLength; i++) {
-
-      IterationCount++;
-
-      arnoldiStep(LinOp, v, z, w, i);
-
-      qrUpdate(i);
-
-      cp = norm(gamma[i+1]);
-
-      std::cout << GridLogIterative << "MPFGMRES: Iteration " << IterationCount
-                << " residual " << cp << " target " << rsq << std::endl;
-
-      if ((i == RestartLength - 1) || (IterationCount == MaxIterations) || (cp <= rsq)) {
-
-        computeSolution(z, psi, i);
-
-        return cp;
-      }
-    }
-
-    assert(0); // Never reached
-    return cp;
-  }
-
-  void arnoldiStep(LinearOperatorBase<FieldD> &LinOp, std::vector<FieldD> &v, std::vector<FieldD> &z, FieldD &w, int iter) {
-
-    FieldF v_f(SinglePrecGrid);
-    FieldF z_f(SinglePrecGrid);
-
-    ChangePrecTimer.Start();
-    precisionChange(v_f, v[iter]);
-    precisionChange(z_f, z[iter]);
-    ChangePrecTimer.Stop();
-
-    PrecTimer.Start();
-    Preconditioner(v_f, z_f);
-    PrecTimer.Stop();
-
-    ChangePrecTimer.Start();
-    precisionChange(z[iter], z_f);
-    ChangePrecTimer.Stop();
-
-    MatrixTimer.Start();
-    LinOp.Op(z[iter], w);
-    MatrixTimer.Stop();
-
-    LinalgTimer.Start();
-    for (int i = 0; i <= iter; ++i) {
-      H(iter, i) = innerProduct(v[i], w);
-      w = w - ComplexD(H(iter, i)) * v[i];
-    }
-
-    H(iter, iter + 1) = sqrt(norm2(w));
-    v[iter + 1] = ComplexD(1. / H(iter, iter + 1)) * w;
-    LinalgTimer.Stop();
-  }
-
-  void qrUpdate(int iter) {
-
-    QrTimer.Start();
-    for (int i = 0; i < iter ; ++i) {
-      auto tmp       = -s[i] * ComplexD(H(iter, i)) + c[i] * ComplexD(H(iter, i + 1));
-      H(iter, i)     = conjugate(c[i]) * ComplexD(H(iter, i)) + conjugate(s[i]) * ComplexD(H(iter, i + 1));
-      H(iter, i + 1) = tmp;
-    }
-
-    // Compute new Givens Rotation
-    auto nu = sqrt(std::norm(H(iter, iter)) + std::norm(H(iter, iter + 1)));
-    c[iter]     = H(iter, iter) / nu;
-    s[iter]     = H(iter, iter + 1) / nu;
-
-    // Apply new Givens rotation
-    H(iter, iter)     = nu;
-    H(iter, iter + 1) = 0.;
-
-    gamma[iter + 1] = -s[iter] * gamma[iter];
-    gamma[iter]     = conjugate(c[iter]) * gamma[iter];
-    QrTimer.Stop();
-  }
-
-  void computeSolution(std::vector<FieldD> const &z, FieldD &psi, int iter) {
-
-    CompSolutionTimer.Start();
-    for (int i = iter; i >= 0; i--) {
-      y[i] = gamma[i];
-      for (int k = i + 1; k <= iter; k++)
-        y[i] = y[i] - ComplexD(H(k, i)) * y[k];
-      y[i] = y[i] / ComplexD(H(i, i));
-    }
-
-    for (int i = 0; i <= iter; i++)
-      psi = psi + z[i] * y[i];
-    CompSolutionTimer.Stop();
-  }
-};
-}
-#endif

Grid/algorithms/iterative/NormalEquations.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,90 +23,38 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_NORMAL_EQUATIONS_H
 #define GRID_NORMAL_EQUATIONS_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-///////////////////////////////////////////////////////////////////////////////////////////////////////
-// Take a matrix and form an NE solver calling a Herm solver
-///////////////////////////////////////////////////////////////////////////////////////////////////////
-template<class Field> class NormalEquations {
-private:
-  SparseMatrixBase<Field> & _Matrix;
-  OperatorFunction<Field> & _HermitianSolver;
-  LinearFunction<Field>   & _Guess;
-public:
+  ///////////////////////////////////////////////////////////////////////////////////////////////////////
+  // Take a matrix and form an NE solver calling a Herm solver
+  ///////////////////////////////////////////////////////////////////////////////////////////////////////
+  template<class Field> class NormalEquations : public OperatorFunction<Field>{
+  private:
+    SparseMatrixBase<Field> & _Matrix;
+    OperatorFunction<Field> & _HermitianSolver;
 
-  /////////////////////////////////////////////////////
-  // Wrap the usual normal equations trick
-  /////////////////////////////////////////////////////
- NormalEquations(SparseMatrixBase<Field> &Matrix, OperatorFunction<Field> &HermitianSolver,
-		 LinearFunction<Field> &Guess) 
-   :  _Matrix(Matrix), _HermitianSolver(HermitianSolver), _Guess(Guess) {}; 
+  public:
 
-  void operator() (const Field &in, Field &out){
+    /////////////////////////////////////////////////////
+    // Wrap the usual normal equations trick
+    /////////////////////////////////////////////////////
+  NormalEquations(SparseMatrixBase<Field> &Matrix, OperatorFunction<Field> &HermitianSolver) 
+    :  _Matrix(Matrix), _HermitianSolver(HermitianSolver) {}; 
+
+    void operator() (const Field &in, Field &out){
  
-    Field src(in.Grid());
-    Field tmp(in.Grid());
+      Field src(in._grid);
 
-    MdagMLinearOperator<SparseMatrixBase<Field>,Field> MdagMOp(_Matrix);
-    _Matrix.Mdag(in,src);
-    _Guess(src,out);
-    _HermitianSolver(MdagMOp,src,out);  // Mdag M out = Mdag in
-
-  }     
-};
-
-template<class Field> class HPDSolver {
-private:
-  LinearOperatorBase<Field> & _Matrix;
-  OperatorFunction<Field> & _HermitianSolver;
-  LinearFunction<Field>   & _Guess;
-public:
-
-  /////////////////////////////////////////////////////
-  // Wrap the usual normal equations trick
-  /////////////////////////////////////////////////////
- HPDSolver(LinearOperatorBase<Field> &Matrix,
-	   OperatorFunction<Field> &HermitianSolver,
-	   LinearFunction<Field> &Guess) 
-   :  _Matrix(Matrix), _HermitianSolver(HermitianSolver), _Guess(Guess) {}; 
-
-  void operator() (const Field &in, Field &out){
+      _Matrix.Mdag(in,src);
+      _HermitianSolver(src,out);  // Mdag M out = Mdag in
  
-    _Guess(in,out);
-    _HermitianSolver(_Matrix,in,out);  // Mdag M out = Mdag in
+    }     
+  };
 
-  }     
-};
-
-
-template<class Field> class MdagMSolver {
-private:
-  SparseMatrixBase<Field> & _Matrix;
-  OperatorFunction<Field> & _HermitianSolver;
-  LinearFunction<Field>   & _Guess;
-public:
-
-  /////////////////////////////////////////////////////
-  // Wrap the usual normal equations trick
-  /////////////////////////////////////////////////////
- MdagMSolver(SparseMatrixBase<Field> &Matrix, OperatorFunction<Field> &HermitianSolver,
-	     LinearFunction<Field> &Guess) 
-   :  _Matrix(Matrix), _HermitianSolver(HermitianSolver), _Guess(Guess) {}; 
-
-  void operator() (const Field &in, Field &out){
- 
-    MdagMLinearOperator<SparseMatrixBase<Field>,Field> MdagMOp(_Matrix);
-    _Guess(in,out);
-
-    _HermitianSolver(MdagMOp,in,out);  // Mdag M out = Mdag in
-
-  }     
-};
-
-NAMESPACE_END(Grid);
+}
 #endif

Grid/algorithms/iterative/PowerMethod.h

@@ -1,45 +0,0 @@
-#pragma once
-namespace Grid {
-template<class Field> class PowerMethod  
-{ 
- public: 
-
-  template<typename T>  static RealD normalise(T& v) 
-  {
-    RealD nn = norm2(v);
-    nn = sqrt(nn);
-    v = v * (1.0/nn);
-    return nn;
-  }
-
-  RealD operator()(LinearOperatorBase<Field> &HermOp, const Field &src) 
-  { 
-    GridBase *grid = src.Grid(); 
-    
-    // quickly get an idea of the largest eigenvalue to more properly normalize the residuum 
-    RealD evalMaxApprox = 0.0; 
-    auto src_n = src; 
-    auto tmp = src; 
-    const int _MAX_ITER_EST_ = 50; 
-
-    for (int i=0;i<_MAX_ITER_EST_;i++) { 
-      
-      normalise(src_n); 
-      HermOp.HermOp(src_n,tmp); 
-      RealD vnum = real(innerProduct(src_n,tmp)); // HermOp. 
-      RealD vden = norm2(src_n); 
-      RealD na = vnum/vden; 
-      
-      if ( (fabs(evalMaxApprox/na - 1.0) < 0.001) || (i==_MAX_ITER_EST_-1) ) { 
- 	evalMaxApprox = na; 
-	std::cout << GridLogMessage << " Approximation of largest eigenvalue: " << evalMaxApprox << std::endl;
- 	return evalMaxApprox; 
-      } 
-      evalMaxApprox = na; 
-      src_n = tmp;
-    }
-    assert(0);
-    return 0;
-  }
-};
-}

Grid/algorithms/iterative/PrecConjugateResidual.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,97 +23,97 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_PREC_CONJUGATE_RESIDUAL_H
 #define GRID_PREC_CONJUGATE_RESIDUAL_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-/////////////////////////////////////////////////////////////
-// Base classes for iterative processes based on operators
-// single input vec, single output vec.
-/////////////////////////////////////////////////////////////
+    /////////////////////////////////////////////////////////////
+    // Base classes for iterative processes based on operators
+    // single input vec, single output vec.
+    /////////////////////////////////////////////////////////////
 
-template<class Field> 
-class PrecConjugateResidual : public OperatorFunction<Field> {
-public:                                                
-  RealD   Tolerance;
-  Integer MaxIterations;
-  int verbose;
-  LinearFunction<Field> &Preconditioner;
+  template<class Field> 
+    class PrecConjugateResidual : public OperatorFunction<Field> {
+  public:                                                
+    RealD   Tolerance;
+    Integer MaxIterations;
+    int verbose;
+    LinearFunction<Field> &Preconditioner;
 
-  PrecConjugateResidual(RealD tol,Integer maxit,LinearFunction<Field> &Prec) : Tolerance(tol), MaxIterations(maxit),      Preconditioner(Prec)
-  { 
-    verbose=1;
-  };
+    PrecConjugateResidual(RealD tol,Integer maxit,LinearFunction<Field> &Prec) : Tolerance(tol), MaxIterations(maxit),      Preconditioner(Prec)
+    { 
+      verbose=1;
+    };
 
-  void operator() (LinearOperatorBase<Field> &Linop,const Field &src, Field &psi){
+    void operator() (LinearOperatorBase<Field> &Linop,const Field &src, Field &psi){
 
-    RealD a, b, c, d;
-    RealD cp, ssq,rsq;
+      RealD a, b, c, d;
+      RealD cp, ssq,rsq;
       
-    RealD rAr, rAAr, rArp;
-    RealD pAp, pAAp;
+      RealD rAr, rAAr, rArp;
+      RealD pAp, pAAp;
 
-    GridBase *grid = src.Grid();
-    Field r(grid),  p(grid), Ap(grid), Ar(grid), z(grid);
+      GridBase *grid = src._grid;
+      Field r(grid),  p(grid), Ap(grid), Ar(grid), z(grid);
       
-    psi=zero;
-    r  = src;
-    Preconditioner(r,p);
+      psi=zero;
+      r  = src;
+      Preconditioner(r,p);
 
       
 
-    Linop.HermOpAndNorm(p,Ap,pAp,pAAp);
-    Ar=Ap;
-    rAr=pAp;
-    rAAr=pAAp;
+      Linop.HermOpAndNorm(p,Ap,pAp,pAAp);
+      Ar=Ap;
+      rAr=pAp;
+      rAAr=pAAp;
 
-    cp =norm2(r);
-    ssq=norm2(src);
-    rsq=Tolerance*Tolerance*ssq;
+      cp =norm2(r);
+      ssq=norm2(src);
+      rsq=Tolerance*Tolerance*ssq;
 
-    if (verbose) std::cout<<GridLogMessage<<"PrecConjugateResidual: iteration " <<0<<" residual "<<cp<< " target"<< rsq<<std::endl;
+      if (verbose) std::cout<<GridLogMessage<<"PrecConjugateResidual: iteration " <<0<<" residual "<<cp<< " target"<< rsq<<std::endl;
 
-    for(int k=0;k<MaxIterations;k++){
+      for(int k=0;k<MaxIterations;k++){
 
 
-      Preconditioner(Ap,z);
-      RealD rq= real(innerProduct(Ap,z)); 
+	Preconditioner(Ap,z);
+	RealD rq= real(innerProduct(Ap,z)); 
 
-      a = rAr/rq;
+	a = rAr/rq;
 
-      axpy(psi,a,p,psi);
-      cp = axpy_norm(r,-a,z,r);
+   	axpy(psi,a,p,psi);
+   cp = axpy_norm(r,-a,z,r);
 
-      rArp=rAr;
+	rArp=rAr;
 
-      Linop.HermOpAndNorm(r,Ar,rAr,rAAr);
+	Linop.HermOpAndNorm(r,Ar,rAr,rAAr);
 
-      b   =rAr/rArp;
+	b   =rAr/rArp;
  
-      axpy(p,b,p,r);
-      pAAp=axpy_norm(Ap,b,Ap,Ar);
+	axpy(p,b,p,r);
+	pAAp=axpy_norm(Ap,b,Ap,Ar);
 	
-      if(verbose) std::cout<<GridLogMessage<<"PrecConjugateResidual: iteration " <<k<<" residual "<<cp<< " target"<< rsq<<std::endl;
+	if(verbose) std::cout<<GridLogMessage<<"PrecConjugateResidual: iteration " <<k<<" residual "<<cp<< " target"<< rsq<<std::endl;
+
+	if(cp<rsq) {
+	  Linop.HermOp(psi,Ap);
+	  axpy(r,-1.0,src,Ap);
+	  RealD true_resid = norm2(r)/ssq;
+	  std::cout<<GridLogMessage<<"PrecConjugateResidual: Converged on iteration " <<k
+		   << " computed residual "<<sqrt(cp/ssq)
+	           << " true residual "<<sqrt(true_resid)
+	           << " target "       <<Tolerance <<std::endl;
+	  return;
+	}
 
-      if(cp<rsq) {
-	Linop.HermOp(psi,Ap);
-	axpy(r,-1.0,src,Ap);
-	RealD true_resid = norm2(r)/ssq;
-	std::cout<<GridLogMessage<<"PrecConjugateResidual: Converged on iteration " <<k
-		 << " computed residual "<<sqrt(cp/ssq)
-		 << " true residual "<<sqrt(true_resid)
-		 << " target "       <<Tolerance <<std::endl;
-	return;
       }
 
+      std::cout<<GridLogMessage<<"PrecConjugateResidual did NOT converge"<<std::endl;
+      assert(0);
     }
-
-    std::cout<<GridLogMessage<<"PrecConjugateResidual did NOT converge"<<std::endl;
-    assert(0);
-  }
-};
-NAMESPACE_END(Grid);
+  };
+}
 #endif

Grid/algorithms/iterative/PrecGeneralisedConjugateResidual.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,8 +24,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_PREC_GCR_H
 #define GRID_PREC_GCR_H
 
@@ -36,204 +36,195 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 //NB. Likely not original reference since they are focussing on a preconditioner variant.
 //    but VPGCR was nicely written up in their paper
 ///////////////////////////////////////////////////////////////////////////////////////////////////////
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-#define GCRLogLevel std::cout << GridLogMessage <<std::string(level,'\t')<< " Level "<<level<<" " 
+  template<class Field>
+    class PrecGeneralisedConjugateResidual : public OperatorFunction<Field> {
+  public:                                                
+    RealD   Tolerance;
+    Integer MaxIterations;
+    int verbose;
+    int mmax;
+    int nstep;
+    int steps;
+    GridStopWatch PrecTimer;
+    GridStopWatch MatTimer;
+    GridStopWatch LinalgTimer;
 
-template<class Field>
-class PrecGeneralisedConjugateResidual : public LinearFunction<Field> {
-public:                                                
+    LinearFunction<Field> &Preconditioner;
 
-  RealD   Tolerance;
-  Integer MaxIterations;
-  int verbose;
-  int mmax;
-  int nstep;
-  int steps;
-  int level;
-  GridStopWatch PrecTimer;
-  GridStopWatch MatTimer;
-  GridStopWatch LinalgTimer;
+   PrecGeneralisedConjugateResidual(RealD tol,Integer maxit,LinearFunction<Field> &Prec,int _mmax,int _nstep) : 
+      Tolerance(tol), 
+      MaxIterations(maxit),
+      Preconditioner(Prec),
+      mmax(_mmax),
+      nstep(_nstep)
+    { 
+      verbose=1;
+    };
 
-  LinearFunction<Field>     &Preconditioner;
-  LinearOperatorBase<Field> &Linop;
+    void operator() (LinearOperatorBase<Field> &Linop,const Field &src, Field &psi){
 
-  void Level(int lv) { level=lv; };
-
-  PrecGeneralisedConjugateResidual(RealD tol,Integer maxit,LinearOperatorBase<Field> &_Linop,LinearFunction<Field> &Prec,int _mmax,int _nstep) : 
-    Tolerance(tol), 
-    MaxIterations(maxit),
-    Linop(_Linop),
-    Preconditioner(Prec),
-    mmax(_mmax),
-    nstep(_nstep)
-  { 
-    level=1;
-    verbose=1;
-  };
-
-  void operator() (const Field &src, Field &psi){
-
-    psi=Zero();
-    RealD cp, ssq,rsq;
-    ssq=norm2(src);
-    rsq=Tolerance*Tolerance*ssq;
+      psi=zero;
+      RealD cp, ssq,rsq;
+      ssq=norm2(src);
+      rsq=Tolerance*Tolerance*ssq;
       
-    Field r(src.Grid());
+      Field r(src._grid);
 
-    PrecTimer.Reset();
-    MatTimer.Reset();
-    LinalgTimer.Reset();
+        PrecTimer.Reset();
+         MatTimer.Reset();
+      LinalgTimer.Reset();
 
-    GridStopWatch SolverTimer;
-    SolverTimer.Start();
+      GridStopWatch SolverTimer;
+      SolverTimer.Start();
 
-    steps=0;
-    for(int k=0;k<MaxIterations;k++){
+      steps=0;
+      for(int k=0;k<MaxIterations;k++){
 
-      cp=GCRnStep(src,psi,rsq);
+	cp=GCRnStep(Linop,src,psi,rsq);
 
-      GCRLogLevel <<"PGCR("<<mmax<<","<<nstep<<") "<< steps <<" steps cp = "<<cp<<" target "<<rsq <<std::endl;
+	std::cout<<GridLogMessage<<"VPGCR("<<mmax<<","<<nstep<<") "<< steps <<" steps cp = "<<cp<<std::endl;
 
-      if(cp<rsq) {
+	if(cp<rsq) {
 
-	SolverTimer.Stop();
+	  SolverTimer.Stop();
 
-	Linop.HermOp(psi,r);
-	axpy(r,-1.0,src,r);
-	RealD tr = norm2(r);
-	GCRLogLevel<<"PGCR: Converged on iteration " <<steps
-		 << " computed residual "<<sqrt(cp/ssq)
-		 << " true residual "    <<sqrt(tr/ssq)
-		 << " target "           <<Tolerance <<std::endl;
+	  Linop.HermOp(psi,r);
+	  axpy(r,-1.0,src,r);
+	  RealD tr = norm2(r);
+	  std::cout<<GridLogMessage<<"PrecGeneralisedConjugateResidual: Converged on iteration " <<steps
+		   << " computed residual "<<sqrt(cp/ssq)
+	           << " true residual "    <<sqrt(tr/ssq)
+	           << " target "           <<Tolerance <<std::endl;
+
+	  std::cout<<GridLogMessage<<"VPGCR Time elapsed: Total  "<< SolverTimer.Elapsed() <<std::endl;
+	  std::cout<<GridLogMessage<<"VPGCR Time elapsed: Precon "<<   PrecTimer.Elapsed() <<std::endl;
+	  std::cout<<GridLogMessage<<"VPGCR Time elapsed: Matrix "<<    MatTimer.Elapsed() <<std::endl;
+	  std::cout<<GridLogMessage<<"VPGCR Time elapsed: Linalg "<< LinalgTimer.Elapsed() <<std::endl;
+	  return;
+	}
 
-	GCRLogLevel<<"PGCR Time elapsed: Total  "<< SolverTimer.Elapsed() <<std::endl;
-	/*
-	  GCRLogLevel<<"PGCR Time elapsed: Precon "<<   PrecTimer.Elapsed() <<std::endl;
-	  GCRLogLevel<<"PGCR Time elapsed: Matrix "<<    MatTimer.Elapsed() <<std::endl;
-	  GCRLogLevel<<"PGCR Time elapsed: Linalg "<< LinalgTimer.Elapsed() <<std::endl;
-	*/
-	return;
       }
-
+      std::cout<<GridLogMessage<<"Variable Preconditioned GCR did not converge"<<std::endl;
+      assert(0);
     }
-    GCRLogLevel<<"Variable Preconditioned GCR did not converge"<<std::endl;
-    //    assert(0);
-  }
 
-  RealD GCRnStep(const Field &src, Field &psi,RealD rsq){
+    RealD GCRnStep(LinearOperatorBase<Field> &Linop,const Field &src, Field &psi,RealD rsq){
 
-    RealD cp;
-    RealD a, b;
-    RealD zAz, zAAz;
-    RealD rq;
+      RealD cp;
+      RealD a, b, c, d;
+      RealD zAz, zAAz;
+      RealD rAq, rq;
 
-    GridBase *grid = src.Grid();
+      GridBase *grid = src._grid;
 
-    Field r(grid);
-    Field z(grid);
-    Field tmp(grid);
-    Field ttmp(grid);
-    Field Az(grid);
+      Field r(grid);
+      Field z(grid);
+      Field tmp(grid);
+      Field ttmp(grid);
+      Field Az(grid);
 
-    ////////////////////////////////
-    // history for flexible orthog
-    ////////////////////////////////
-    std::vector<Field> q(mmax,grid);
-    std::vector<Field> p(mmax,grid);
-    std::vector<RealD> qq(mmax);
+      ////////////////////////////////
+      // history for flexible orthog
+      ////////////////////////////////
+      std::vector<Field> q(mmax,grid);
+      std::vector<Field> p(mmax,grid);
+      std::vector<RealD> qq(mmax);
       
-    GCRLogLevel<< "PGCR nStep("<<nstep<<")"<<std::endl;
-
-    //////////////////////////////////
-    // initial guess x0 is taken as nonzero.
-    // r0=src-A x0 = src
-    //////////////////////////////////
-    MatTimer.Start();
-    Linop.HermOpAndNorm(psi,Az,zAz,zAAz); 
-    MatTimer.Stop();
-    
-
-    LinalgTimer.Start();
-    r=src-Az;
-    LinalgTimer.Stop();
-    GCRLogLevel<< "PGCR true residual r = src - A psi   "<<norm2(r) <<std::endl;
-    
-    /////////////////////
-    // p = Prec(r)
-    /////////////////////
-
-    PrecTimer.Start();
-    Preconditioner(r,z);
-    PrecTimer.Stop();
-
-    MatTimer.Start();
-    Linop.HermOpAndNorm(z,Az,zAz,zAAz); 
-    MatTimer.Stop();
-
-    LinalgTimer.Start();
-
-    //p[0],q[0],qq[0] 
-    p[0]= z;
-    q[0]= Az;
-    qq[0]= zAAz;
-    
-    cp =norm2(r);
-    LinalgTimer.Stop();
-
-    for(int k=0;k<nstep;k++){
-
-      steps++;
-
-      int kp     = k+1;
-      int peri_k = k %mmax;
-      int peri_kp= kp%mmax;
-
-      LinalgTimer.Start();
-      rq= real(innerProduct(r,q[peri_k])); // what if rAr not real?
-      a = rq/qq[peri_k];
-
-      axpy(psi,a,p[peri_k],psi);         
-
-      cp = axpy_norm(r,-a,q[peri_k],r);
-      LinalgTimer.Stop();
-
-      GCRLogLevel<< "PGCR step["<<steps<<"]  resid " << cp << " target " <<rsq<<std::endl; 
-
-      if((k==nstep-1)||(cp<rsq)){
-	return cp;
-      }
-
-
+      //////////////////////////////////
+      // initial guess x0 is taken as nonzero.
+      // r0=src-A x0 = src
+      //////////////////////////////////
+      MatTimer.Start();
+      Linop.HermOpAndNorm(psi,Az,zAz,zAAz); 
+      MatTimer.Stop();
+      r=src-Az;
+      
+      /////////////////////
+      // p = Prec(r)
+      /////////////////////
       PrecTimer.Start();
-      Preconditioner(r,z);// solve Az = r
+      Preconditioner(r,z);
       PrecTimer.Stop();
 
       MatTimer.Start();
-      Linop.HermOpAndNorm(z,Az,zAz,zAAz);
+      Linop.HermOp(z,tmp); 
       MatTimer.Stop();
 
-      LinalgTimer.Start();
+      ttmp=tmp;
+      tmp=tmp-r;
 
-      q[peri_kp]=Az;
-      p[peri_kp]=z;
+      /*
+      std::cout<<GridLogMessage<<r<<std::endl;
+      std::cout<<GridLogMessage<<z<<std::endl;
+      std::cout<<GridLogMessage<<ttmp<<std::endl;
+      std::cout<<GridLogMessage<<tmp<<std::endl;
+      */
 
-      int northog = ((kp)>(mmax-1))?(mmax-1):(kp);  // if more than mmax done, we orthog all mmax history.
-      for(int back=0;back<northog;back++){
+      MatTimer.Start();
+      Linop.HermOpAndNorm(z,Az,zAz,zAAz); 
+      MatTimer.Stop();
 
-	int peri_back=(k-back)%mmax;   	  assert((k-back)>=0);
+      //p[0],q[0],qq[0] 
+      p[0]= z;
+      q[0]= Az;
+      qq[0]= zAAz;
+
+      cp =norm2(r);
+
+      for(int k=0;k<nstep;k++){
+
+	steps++;
+
+	int kp     = k+1;
+	int peri_k = k %mmax;
+	int peri_kp= kp%mmax;
+
+	rq= real(innerProduct(r,q[peri_k])); // what if rAr not real?
+	a = rq/qq[peri_k];
+
+	axpy(psi,a,p[peri_k],psi);         
+
+	cp = axpy_norm(r,-a,q[peri_k],r);  
+
+	if((k==nstep-1)||(cp<rsq)){
+	  return cp;
+	}
+
+	std::cout<<GridLogMessage<< " VPGCR_step["<<steps<<"]  resid " <<sqrt(cp/rsq)<<std::endl; 
+
+	PrecTimer.Start();
+	Preconditioner(r,z);// solve Az = r
+	PrecTimer.Stop();
+
+	MatTimer.Start();
+	Linop.HermOpAndNorm(z,Az,zAz,zAAz);
+	Linop.HermOp(z,tmp);
+	MatTimer.Stop();
+        tmp=tmp-r;
+	std::cout<<GridLogMessage<< " Preconditioner resid " <<sqrt(norm2(tmp)/norm2(r))<<std::endl; 
+
+	q[peri_kp]=Az;
+	p[peri_kp]=z;
+
+	int northog = ((kp)>(mmax-1))?(mmax-1):(kp);  // if more than mmax done, we orthog all mmax history.
+	for(int back=0;back<northog;back++){
+
+	  int peri_back=(k-back)%mmax;   	  assert((k-back)>=0);
+
+	  b=-real(innerProduct(q[peri_back],Az))/qq[peri_back];
+	  p[peri_kp]=p[peri_kp]+b*p[peri_back];
+	  q[peri_kp]=q[peri_kp]+b*q[peri_back];
+
+	}
+	qq[peri_kp]=norm2(q[peri_kp]); // could use axpy_norm
 
-	b=-real(innerProduct(q[peri_back],Az))/qq[peri_back];
-	p[peri_kp]=p[peri_kp]+b*p[peri_back];
-	q[peri_kp]=q[peri_kp]+b*q[peri_back];
 
       }
-      qq[peri_kp]=norm2(q[peri_kp]); // could use axpy_norm
-      LinalgTimer.Stop();
+      assert(0); // never reached
+      return cp;
     }
-    assert(0); // never reached
-    return cp;
-  }
-};
-NAMESPACE_END(Grid);
+  };
+}
 #endif

Grid/algorithms/iterative/QuasiMinimalResidual.h

@@ -1,371 +0,0 @@
-/*************************************************************************************
-
-Grid physics library, www.github.com/paboyle/Grid
-
-Source file: ./lib/algorithmsf/iterative/QuasiMinimalResidual.h
-
-Copyright (C) 2019
-
-Author: Peter Boyle <paboyle@ph.ed.ac.uk>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-See the full license in the file "LICENSE" in the top level distribution
-directory
-*************************************************************************************/
-/*  END LEGAL */
-#pragma once
-
-NAMESPACE_BEGIN(Grid);
-
-template<class Field> 
-RealD innerG5ProductReal(Field &l, Field &r)
-{
-  Gamma G5(Gamma::Algebra::Gamma5);
-  Field tmp(l.Grid());
-  //  tmp = G5*r;
-  G5R5(tmp,r);
-  ComplexD ip =innerProduct(l,tmp);
-  std::cout << "innerProductRealG5R5 "<<ip<<std::endl;
-  return ip.real();
-}
-
-template<class Field>
-class QuasiMinimalResidual : public OperatorFunction<Field> {
- public:
-  using OperatorFunction<Field>::operator();
-
-  bool ErrorOnNoConverge; 
-  RealD   Tolerance;
-  Integer MaxIterations;
-  Integer IterationCount;
-
-  QuasiMinimalResidual(RealD   tol,
-		       Integer maxit,
-		       bool    err_on_no_conv = true)
-      : Tolerance(tol)
-      , MaxIterations(maxit)
-      , ErrorOnNoConverge(err_on_no_conv) 
-  {};
-
-#if 1
-  void operator()(LinearOperatorBase<Field> &LinOp, const Field &b, Field &x) 
-  {
-    RealD resid;
-    IterationCount=0;
-
-    RealD  rho, rho_1, xi, gamma, gamma_1, theta, theta_1;
-    RealD  eta, delta, ep, beta; 
-
-    GridBase *Grid = b.Grid();
-    Field r(Grid), d(Grid), s(Grid);
-    Field v(Grid), w(Grid), y(Grid),  z(Grid);
-    Field v_tld(Grid), w_tld(Grid), y_tld(Grid), z_tld(Grid);
-    Field p(Grid), q(Grid), p_tld(Grid);
-
-    Real normb = norm2(b);
-
-    LinOp.Op(x,r); r = b - r;
-
-    assert(normb> 0.0);
-
-    resid = norm2(r)/normb;
-    if (resid <= Tolerance) {
-      return;
-    }
-
-    v_tld = r;
-    y = v_tld;
-    rho = norm2(y);
-
-    // Take Gamma5 conjugate
-    //    Gamma G5(Gamma::Algebra::Gamma5);
-    //    G5R5(w_tld,r);
-    //    w_tld = G5* v_tld;
-    w_tld=v_tld;
-    z = w_tld;
-    xi = norm2(z);
-
-    gamma = 1.0;
-    eta   = -1.0;
-    theta = 0.0;
-
-    for (int i = 1; i <= MaxIterations; i++) {
-
-      // Breakdown tests
-      assert( rho != 0.0);
-      assert( xi  != 0.0);
-
-      v = (1. / rho) * v_tld;
-      y = (1. / rho) * y;
-
-      w = (1. / xi) * w_tld;
-      z = (1. / xi) * z;
-
-      ComplexD Zdelta = innerProduct(z, y); // Complex?
-      std::cout << "Zdelta "<<Zdelta<<std::endl;
-      delta = Zdelta.real();
-
-      y_tld = y; 
-      z_tld = z;
-
-      if (i > 1) {
-	p = y_tld - (xi  * delta / ep) * p;
-	q = z_tld - (rho * delta / ep) * q;
-      } else {
-	p = y_tld;
-	q = z_tld;
-      }
-
-      LinOp.Op(p,p_tld);      //     p_tld = A * p;
-      ComplexD Zep = innerProduct(q, p_tld);
-      ep=Zep.real();
-      std::cout << "Zep "<<Zep <<std::endl;
-      // Complex Audit
-      assert(abs(ep)>0);
-
-      beta = ep / delta;
-      assert(abs(beta)>0);
-
-      v_tld = p_tld - beta * v;
-      y = v_tld;
-
-      rho_1 = rho;
-      rho   = norm2(y);
-      LinOp.AdjOp(q,w_tld);
-      w_tld = w_tld - beta * w;
-      z = w_tld;
-
-      xi = norm2(z);
-
-      gamma_1 = gamma;
-      theta_1 = theta;
-
-      theta   = rho / (gamma_1 * beta);
-      gamma   = 1.0 / sqrt(1.0 + theta * theta);
-      std::cout << "theta "<<theta<<std::endl;
-      std::cout << "gamma "<<gamma<<std::endl;
-
-      assert(abs(gamma)> 0.0);
-
-      eta = -eta * rho_1 * gamma* gamma / (beta * gamma_1 * gamma_1);
-
-      if (i > 1) {
-	d = eta * p + (theta_1 * theta_1 * gamma * gamma) * d;
-	s = eta * p_tld + (theta_1 * theta_1 * gamma * gamma) * s;
-      } else {
-	d = eta * p;
-	s = eta * p_tld;
-      }
-
-      x =x+d;                            // update approximation vector
-      r =r-s;                            // compute residual
-
-      if ((resid = norm2(r) / normb) <= Tolerance) {
-	return;
-      }
-      std::cout << "Iteration "<<i<<" resid " << resid<<std::endl;
-    }
-    assert(0);
-    return;                            // no convergence
-  }
-#else
-  // QMRg5 SMP thesis
-  void operator()(LinearOperatorBase<Field> &LinOp, const Field &b, Field &x) 
-  {
-    // Real scalars
-    GridBase *grid = b.Grid();
-
-    Field    r(grid);
-    Field    p_m(grid), p_m_minus_1(grid), p_m_minus_2(grid);
-    Field    v_m(grid), v_m_minus_1(grid), v_m_plus_1(grid);
-    Field    tmp(grid);
-
-    RealD    w;
-    RealD    z1, z2;
-    RealD    delta_m, delta_m_minus_1;
-    RealD    c_m_plus_1, c_m, c_m_minus_1;
-    RealD    s_m_plus_1, s_m, s_m_minus_1;
-    RealD    alpha, beta, gamma, epsilon;
-    RealD    mu, nu, rho, theta, xi, chi;
-    RealD    mod2r, mod2b;
-    RealD    tau2, target2;
-
-    mod2b=norm2(b);
-
-    /////////////////////////
-    // Initial residual
-    /////////////////////////
-    LinOp.Op(x,tmp);
-    r = b - tmp;
-
-    /////////////////////////
-    // \mu = \rho = |r_0|
-    /////////////////////////
-    mod2r = norm2(r);
-    rho = sqrt( mod2r);
-    mu=rho;
-    
-    std::cout << "QuasiMinimalResidual rho "<< rho<<std::endl;
-    /////////////////////////
-    // Zero negative history
-    /////////////////////////
-    v_m_plus_1  = Zero();
-    v_m_minus_1 = Zero();
-    p_m_minus_1 = Zero();
-    p_m_minus_2 = Zero();
-
-    // v0
-    v_m = (1.0/rho)*r;
-
-    /////////////////////////
-    // Initial coeffs
-    /////////////////////////
-    delta_m_minus_1 = 1.0;
-    c_m_minus_1     = 1.0;
-    c_m             = 1.0;
-    s_m_minus_1     = 0.0;
-    s_m             = 0.0;
-
-    /////////////////////////
-    // Set up convergence check
-    /////////////////////////
-    tau2    = mod2r;
-    target2 = mod2b * Tolerance*Tolerance;
- 
-    for(int iter = 0 ; iter < MaxIterations; iter++){
-
-      /////////////////////////
-      // \delta_m = (v_m, \gamma_5 v_m) 
-      /////////////////////////
-      delta_m = innerG5ProductReal(v_m,v_m);
-      std::cout << "QuasiMinimalResidual delta_m "<< delta_m<<std::endl;
-
-      /////////////////////////
-      // tmp = A v_m
-      /////////////////////////
-      LinOp.Op(v_m,tmp);
-
-      /////////////////////////
-      // \alpha = (v_m, \gamma_5 temp) / \delta_m 
-      /////////////////////////
-      alpha = innerG5ProductReal(v_m,tmp);
-      alpha = alpha/delta_m ;
-      std::cout << "QuasiMinimalResidual alpha "<< alpha<<std::endl;
-
-      /////////////////////////
-      // \beta = \rho \delta_m / \delta_{m-1}
-      /////////////////////////
-      beta = rho * delta_m / delta_m_minus_1;
-      std::cout << "QuasiMinimalResidual beta "<< beta<<std::endl;
-
-      /////////////////////////
-      // \tilde{v}_{m+1} = temp - \alpha v_m - \beta v_{m-1}
-      /////////////////////////
-      v_m_plus_1 = tmp - alpha*v_m - beta*v_m_minus_1;
-
-      ///////////////////////////////
-      // \rho = || \tilde{v}_{m+1} ||
-      ///////////////////////////////
-      rho = sqrt( norm2(v_m_plus_1) );
-      std::cout << "QuasiMinimalResidual rho "<< rho<<std::endl;
-
-      ///////////////////////////////
-      //      v_{m+1} = \tilde{v}_{m+1}
-      ///////////////////////////////
-      v_m_plus_1 = (1.0 / rho) * v_m_plus_1;
-
-      ////////////////////////////////
-      // QMR recurrence coefficients.
-      ////////////////////////////////
-      theta      = s_m_minus_1 * beta;
-      gamma      = c_m_minus_1 * beta;
-      epsilon    =  c_m * gamma + s_m * alpha;
-      xi         = -s_m * gamma + c_m * alpha;
-      nu         = sqrt( xi*xi + rho*rho );
-      c_m_plus_1 = fabs(xi) / nu;
-      if ( xi == 0.0 ) {
-	s_m_plus_1 = 1.0;
-      } else {
-	s_m_plus_1 = c_m_plus_1 * rho / xi;
-      }
-      chi = c_m_plus_1 * xi + s_m_plus_1 * rho;
-
-      std::cout << "QuasiMinimalResidual coeffs "<< theta <<" "<<gamma<<" "<< epsilon<<" "<< xi<<" "<< nu<<std::endl;
-      std::cout << "QuasiMinimalResidual coeffs "<< chi   <<std::endl;
-
-      ////////////////////////////////
-      //p_m=(v_m - \epsilon p_{m-1} - \theta p_{m-2}) / \chi
-      ////////////////////////////////
-      p_m = (1.0/chi) * v_m - (epsilon/chi) * p_m_minus_1 - (theta/chi) * p_m_minus_2;
-
-      ////////////////////////////////////////////////////////////////
-      //      \psi = \psi + c_{m+1} \mu p_m	
-      ////////////////////////////////////////////////////////////////
-      x = x + ( c_m_plus_1 * mu ) * p_m;
-
-      ////////////////////////////////////////
-      //
-      ////////////////////////////////////////
-      mu              = -s_m_plus_1 * mu;
-      delta_m_minus_1 = delta_m;
-      c_m_minus_1     = c_m;
-      c_m             = c_m_plus_1;
-      s_m_minus_1     = s_m;
-      s_m             = s_m_plus_1;
-
-      ////////////////////////////////////
-      // Could use pointer swizzle games.
-      ////////////////////////////////////
-      v_m_minus_1 = v_m;
-      v_m         = v_m_plus_1;
-      p_m_minus_2 = p_m_minus_1;
-      p_m_minus_1 = p_m;
-
-
-      /////////////////////////////////////
-      // Convergence checks
-      /////////////////////////////////////
-      z1 = RealD(iter+1.0);
-      z2 = z1 + 1.0;
-      tau2 = tau2 *( z2 / z1 ) * s_m * s_m;
-      std::cout << " QuasiMinimumResidual iteration "<< iter<<std::endl;
-      std::cout << " QuasiMinimumResidual tau bound "<< tau2<<std::endl;
-
-      // Compute true residual
-      mod2r = tau2;
-      if ( 1 || (tau2 < (100.0 * target2)) ) {
-	LinOp.Op(x,tmp);
-	r = b - tmp;
-	mod2r = norm2(r);
-	std::cout << " QuasiMinimumResidual true residual is "<< mod2r<<std::endl;
-      }
-
-
-      if ( mod2r < target2 ) { 
-
-	std::cout << " QuasiMinimumResidual has converged"<<std::endl;
-	return;
-
-      }
-
-    }
-
-
-  }
-#endif
-};
-
-NAMESPACE_END(Grid);

Grid/algorithms/iterative/Reconstruct5Dprop.h

@@ -27,7 +27,51 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     /*  END LEGAL */
 #pragma once
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
+namespace QCD {
+
+
+template<class Field>
+class PauliVillarsSolverUnprec
+{
+ public:
+  ConjugateGradient<Field> & CG;
+  PauliVillarsSolverUnprec(  ConjugateGradient<Field> &_CG) : CG(_CG){};
+
+  template<class Matrix>
+  void operator() (Matrix &_Matrix,const Field &src,Field &sol)
+  {
+    RealD m = _Matrix.Mass();
+    Field A  (_Matrix.FermionGrid());
+
+    MdagMLinearOperator<Matrix,Field> HermOp(_Matrix);
+
+    _Matrix.SetMass(1.0);
+    _Matrix.Mdag(src,A);
+    CG(HermOp,A,sol);
+    _Matrix.SetMass(m);
+  };
+};
+
+template<class Field>
+class PauliVillarsSolverRBprec
+{
+ public:
+  ConjugateGradient<Field> & CG;
+  PauliVillarsSolverRBprec(  ConjugateGradient<Field> &_CG) : CG(_CG){};
+
+  template<class Matrix>
+  void operator() (Matrix &_Matrix,const Field &src,Field &sol)
+  {
+    RealD m = _Matrix.Mass();
+    Field A  (_Matrix.FermionGrid());
+
+    _Matrix.SetMass(1.0);
+    SchurRedBlackDiagMooeeSolve<Field> SchurSolver(CG);
+    SchurSolver(_Matrix,src,sol);
+    _Matrix.SetMass(m);
+  };
+};
 
 template<class Field,class PVinverter> class Reconstruct5DfromPhysical {
  private:
@@ -41,12 +85,20 @@ template<class Field,class PVinverter> class Reconstruct5DfromPhysical {
  // of the Mobius exact AMA corrections.
  //
  // TODO : understand absence of contact term in eqns in Hantao's thesis
- //        sol4 is contact term subtracted, but thesis & Brower's paper suggests not.
+ //        sol4 is contact term subtracted.
  //
- // Step 1: Localise PV inverse in a routine. [DONE]
+ // Options
+ // a) Defect correction approach:
+ //    1) Compute defect from current soln (initially guess).
+ //       This is ...... outerToInner check !!!!
+ //    2) Deflated Zmobius solve to get 4d soln
+ //       Ensure deflation is working
+ //    3) Refine 5d Outer using the inner 4d delta soln
+ // 
+ // Step 1: localise PV inverse in a routine. [DONE]
  // Step 2: Schur based PV inverse            [DONE]
- // Step 3: Fourier accelerated PV inverse    [DONE]
- //
+ // Step 3: Fourier accelerated PV inverse
+ // Step 4: 
  /////////////////////////////////////////////////////
  
   Reconstruct5DfromPhysical(PVinverter &_PauliVillarsSolver) 
@@ -130,5 +182,5 @@ template<class Field,class PVinverter> class Reconstruct5DfromPhysical {
   }
 };
 
-NAMESPACE_END(Grid);
-
+}
+}

Grid/algorithms/iterative/SchurRedBlack.h

@@ -87,25 +87,228 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 namespace Grid {
 
   ///////////////////////////////////////////////////////////////////////////////////////////////////////
-  // Use base class to share code
+  // Take a matrix and form a Red Black solver calling a Herm solver
+  // Use of RB info prevents making SchurRedBlackSolve conform to standard interface
   ///////////////////////////////////////////////////////////////////////////////////////////////////////
+  // Now make the norm reflect extra factor of Mee
+  template<class Field> class SchurRedBlackStaggeredSolve {
+  private:
+    OperatorFunction<Field> & _HermitianRBSolver;
+    int CBfactorise;
+    bool subGuess;
+  public:
+
+    /////////////////////////////////////////////////////
+    // Wrap the usual normal equations Schur trick
+    /////////////////////////////////////////////////////
+  SchurRedBlackStaggeredSolve(OperatorFunction<Field> &HermitianRBSolver, const bool initSubGuess = false)  :
+     _HermitianRBSolver(HermitianRBSolver) 
+    { 
+      CBfactorise=0;
+      subtractGuess(initSubGuess);
+    };
+    void subtractGuess(const bool initSubGuess)
+    {
+      subGuess = initSubGuess;
+    }
+    bool isSubtractGuess(void)
+    {
+      return subGuess;
+    }
+
+    template<class Matrix>
+    void operator() (Matrix & _Matrix,const Field &in, Field &out){
+      ZeroGuesser<Field> guess;
+      (*this)(_Matrix,in,out,guess);
+    }
+    template<class Matrix, class Guesser>
+    void operator() (Matrix & _Matrix,const Field &in, Field &out, Guesser &guess){
+
+      // FIXME CGdiagonalMee not implemented virtual function
+      // FIXME use CBfactorise to control schur decomp
+      GridBase *grid = _Matrix.RedBlackGrid();
+      GridBase *fgrid= _Matrix.Grid();
+
+      SchurStaggeredOperator<Matrix,Field> _HermOpEO(_Matrix);
+ 
+      Field src_e(grid);
+      Field src_o(grid);
+      Field sol_e(grid);
+      Field sol_o(grid);
+      Field   tmp(grid);
+      Field  Mtmp(grid);
+      Field resid(fgrid);
+      
+      std::cout << GridLogMessage << " SchurRedBlackStaggeredSolve " <<std::endl;
+      pickCheckerboard(Even,src_e,in);
+      pickCheckerboard(Odd ,src_o,in);
+      pickCheckerboard(Even,sol_e,out);
+      pickCheckerboard(Odd ,sol_o,out);
+      std::cout << GridLogMessage << " SchurRedBlackStaggeredSolve checkerboards picked" <<std::endl;
+    
+      /////////////////////////////////////////////////////
+      // src_o = (source_o - Moe MeeInv source_e)
+      /////////////////////////////////////////////////////
+      _Matrix.MooeeInv(src_e,tmp);     assert(  tmp.checkerboard ==Even);
+      _Matrix.Meooe   (tmp,Mtmp);      assert( Mtmp.checkerboard ==Odd);     
+      tmp=src_o-Mtmp;                  assert(  tmp.checkerboard ==Odd);     
+
+      //src_o = tmp;     assert(src_o.checkerboard ==Odd);
+      _Matrix.Mooee(tmp,src_o); // Extra factor of "m" in source from dumb choice of matrix norm.
+
+      //////////////////////////////////////////////////////////////
+      // Call the red-black solver
+      //////////////////////////////////////////////////////////////
+      std::cout<<GridLogMessage << "SchurRedBlackStaggeredSolver calling the Mpc solver" <<std::endl;
+      guess(src_o, sol_o);
+      Mtmp = sol_o;
+      _HermitianRBSolver(_HermOpEO,src_o,sol_o);  assert(sol_o.checkerboard==Odd);
+      std::cout<<GridLogMessage << "SchurRedBlackStaggeredSolver called  the Mpc solver" <<std::endl;
+      // Fionn A2A boolean behavioural control
+      if (subGuess)        sol_o = sol_o-Mtmp;
+
+      ///////////////////////////////////////////////////
+      // sol_e = M_ee^-1 * ( src_e - Meo sol_o )...
+      ///////////////////////////////////////////////////
+      _Matrix.Meooe(sol_o,tmp);        assert(  tmp.checkerboard   ==Even);
+      src_e = src_e-tmp;               assert(  src_e.checkerboard ==Even);
+      _Matrix.MooeeInv(src_e,sol_e);   assert(  sol_e.checkerboard ==Even);
+     
+      std::cout<<GridLogMessage << "SchurRedBlackStaggeredSolver reconstructed other CB" <<std::endl;
+      setCheckerboard(out,sol_e); assert(  sol_e.checkerboard ==Even);
+      setCheckerboard(out,sol_o); assert(  sol_o.checkerboard ==Odd );
+      std::cout<<GridLogMessage << "SchurRedBlackStaggeredSolver inserted solution" <<std::endl;
+
+      // Verify the unprec residual
+      if ( ! subGuess ) {
+        _Matrix.M(out,resid); 
+        resid = resid-in;
+        RealD ns = norm2(in);
+        RealD nr = norm2(resid);
+        std::cout<<GridLogMessage << "SchurRedBlackStaggered solver true unprec resid "<< std::sqrt(nr/ns) <<" nr "<< nr <<" ns "<<ns << std::endl;
+      } else {
+        std::cout << GridLogMessage << "Guess subtracted after solve." << std::endl;
+      }
+    }     
+  };
+  template<class Field> using SchurRedBlackStagSolve = SchurRedBlackStaggeredSolve<Field>;
+
   ///////////////////////////////////////////////////////////////////////////////////////////////////////
   // Take a matrix and form a Red Black solver calling a Herm solver
   // Use of RB info prevents making SchurRedBlackSolve conform to standard interface
   ///////////////////////////////////////////////////////////////////////////////////////////////////////
-  template<class Field> class SchurRedBlackBase {
-  protected:
-    typedef CheckerBoardedSparseMatrixBase<Field> Matrix;
+  template<class Field> class SchurRedBlackDiagMooeeSolve {
+  private:
     OperatorFunction<Field> & _HermitianRBSolver;
     int CBfactorise;
     bool subGuess;
-    bool useSolnAsInitGuess; // if true user-supplied solution vector is used as initial guess for solver
   public:
 
-    SchurRedBlackBase(OperatorFunction<Field> &HermitianRBSolver, const bool initSubGuess = false,
-        const bool _solnAsInitGuess = false)  :
-    _HermitianRBSolver(HermitianRBSolver),
-    useSolnAsInitGuess(_solnAsInitGuess)
+    /////////////////////////////////////////////////////
+    // Wrap the usual normal equations Schur trick
+    /////////////////////////////////////////////////////
+  SchurRedBlackDiagMooeeSolve(OperatorFunction<Field> &HermitianRBSolver,int cb=0, const bool initSubGuess = false)  :  _HermitianRBSolver(HermitianRBSolver) 
+  { 
+    CBfactorise=cb;
+    subtractGuess(initSubGuess);
+  };
+    void subtractGuess(const bool initSubGuess)
+    {
+      subGuess = initSubGuess;
+    }
+    bool isSubtractGuess(void)
+    {
+      return subGuess;
+    }
+    template<class Matrix>
+    void operator() (Matrix & _Matrix,const Field &in, Field &out){
+      ZeroGuesser<Field> guess;
+      (*this)(_Matrix,in,out,guess);
+    }
+    template<class Matrix, class Guesser>
+    void operator() (Matrix & _Matrix,const Field &in, Field &out,Guesser &guess){
+
+      // FIXME CGdiagonalMee not implemented virtual function
+      // FIXME use CBfactorise to control schur decomp
+      GridBase *grid = _Matrix.RedBlackGrid();
+      GridBase *fgrid= _Matrix.Grid();
+
+      SchurDiagMooeeOperator<Matrix,Field> _HermOpEO(_Matrix);
+ 
+      Field src_e(grid);
+      Field src_o(grid);
+      Field sol_e(grid);
+      Field sol_o(grid);
+      Field   tmp(grid);
+      Field  Mtmp(grid);
+      Field resid(fgrid);
+
+      pickCheckerboard(Even,src_e,in);
+      pickCheckerboard(Odd ,src_o,in);
+      pickCheckerboard(Even,sol_e,out);
+      pickCheckerboard(Odd ,sol_o,out);
+    
+      /////////////////////////////////////////////////////
+      // src_o = Mdag * (source_o - Moe MeeInv source_e)
+      /////////////////////////////////////////////////////
+      _Matrix.MooeeInv(src_e,tmp);     assert(  tmp.checkerboard ==Even);
+      _Matrix.Meooe   (tmp,Mtmp);      assert( Mtmp.checkerboard ==Odd);     
+      tmp=src_o-Mtmp;                  assert(  tmp.checkerboard ==Odd);     
+
+      // get the right MpcDag
+      _HermOpEO.MpcDag(tmp,src_o);     assert(src_o.checkerboard ==Odd);       
+
+      //////////////////////////////////////////////////////////////
+      // Call the red-black solver
+      //////////////////////////////////////////////////////////////
+      std::cout<<GridLogMessage << "SchurRedBlack solver calling the MpcDagMp solver" <<std::endl;
+      guess(src_o,sol_o);
+      Mtmp = sol_o;
+      _HermitianRBSolver(_HermOpEO,src_o,sol_o);  assert(sol_o.checkerboard==Odd);
+      // Fionn A2A boolean behavioural control
+      if (subGuess)        sol_o = sol_o-Mtmp;
+
+      ///////////////////////////////////////////////////
+      // sol_e = M_ee^-1 * ( src_e - Meo sol_o )...
+      ///////////////////////////////////////////////////
+      _Matrix.Meooe(sol_o,tmp);        assert(  tmp.checkerboard   ==Even);
+      src_e = src_e-tmp;               assert(  src_e.checkerboard ==Even);
+      _Matrix.MooeeInv(src_e,sol_e);   assert(  sol_e.checkerboard ==Even);
+     
+      setCheckerboard(out,sol_e); assert(  sol_e.checkerboard ==Even);
+      setCheckerboard(out,sol_o); assert(  sol_o.checkerboard ==Odd );
+
+      // Verify the unprec residual
+      if ( ! subGuess ) {
+        _Matrix.M(out,resid); 
+        resid = resid-in;
+        RealD ns = norm2(in);
+        RealD nr = norm2(resid);
+
+        std::cout<<GridLogMessage << "SchurRedBlackDiagMooee solver true unprec resid "<< std::sqrt(nr/ns) <<" nr "<< nr <<" ns "<<ns << std::endl;
+      } else {
+        std::cout << GridLogMessage << "Guess subtracted after solve." << std::endl;
+      }
+    }     
+  };
+
+
+  ///////////////////////////////////////////////////////////////////////////////////////////////////////
+  // Take a matrix and form a Red Black solver calling a Herm solver
+  // Use of RB info prevents making SchurRedBlackSolve conform to standard interface
+  ///////////////////////////////////////////////////////////////////////////////////////////////////////
+  template<class Field> class SchurRedBlackDiagTwoSolve {
+  private:
+    OperatorFunction<Field> & _HermitianRBSolver;
+    int CBfactorise;
+    bool subGuess;
+  public:
+
+    /////////////////////////////////////////////////////
+    // Wrap the usual normal equations Schur trick
+    /////////////////////////////////////////////////////
+  SchurRedBlackDiagTwoSolve(OperatorFunction<Field> &HermitianRBSolver, const bool initSubGuess = false)  :
+     _HermitianRBSolver(HermitianRBSolver) 
     { 
       CBfactorise = 0;
       subtractGuess(initSubGuess);
@@ -119,90 +322,12 @@ namespace Grid {
       return subGuess;
     }
 
-    /////////////////////////////////////////////////////////////
-    // Shared code
-    /////////////////////////////////////////////////////////////
+    template<class Matrix>
     void operator() (Matrix & _Matrix,const Field &in, Field &out){
       ZeroGuesser<Field> guess;
       (*this)(_Matrix,in,out,guess);
     }
-    void operator()(Matrix &_Matrix, const std::vector<Field> &in, std::vector<Field> &out) 
-    {
-      ZeroGuesser<Field> guess;
-      (*this)(_Matrix,in,out,guess);
-    }
-
-    template<class Guesser>
-    void operator()(Matrix &_Matrix, const std::vector<Field> &in, std::vector<Field> &out,Guesser &guess) 
-    {
-      GridBase *grid = _Matrix.RedBlackGrid();
-      GridBase *fgrid= _Matrix.Grid();
-      int nblock = in.size();
-
-      std::vector<Field> src_o(nblock,grid);
-      std::vector<Field> sol_o(nblock,grid);
-      
-      std::vector<Field> guess_save;
-
-      Field resid(fgrid);
-      Field tmp(grid);
-
-      ////////////////////////////////////////////////
-      // Prepare RedBlack source
-      ////////////////////////////////////////////////
-      for(int b=0;b<nblock;b++){
-	RedBlackSource(_Matrix,in[b],tmp,src_o[b]);
-      }
-      ////////////////////////////////////////////////
-      // Make the guesses
-      ////////////////////////////////////////////////
-      if ( subGuess ) guess_save.resize(nblock,grid);
-
-      for(int b=0;b<nblock;b++){
-        if(useSolnAsInitGuess) {
-          pickCheckerboard(Odd, sol_o[b], out[b]);
-        } else {
-          guess(src_o[b],sol_o[b]); 
-        }
-
-	if ( subGuess ) { 
-	  guess_save[b] = sol_o[b];
-	}
-      }
-      //////////////////////////////////////////////////////////////
-      // Call the block solver
-      //////////////////////////////////////////////////////////////
-      std::cout<<GridLogMessage << "SchurRedBlackBase calling the solver for "<<nblock<<" RHS" <<std::endl;
-      RedBlackSolve(_Matrix,src_o,sol_o);
-
-      ////////////////////////////////////////////////
-      // A2A boolean behavioural control & reconstruct other checkerboard
-      ////////////////////////////////////////////////
-      for(int b=0;b<nblock;b++) {
-
-	if (subGuess)   sol_o[b] = sol_o[b] - guess_save[b];
-
-	///////// Needs even source //////////////
-	pickCheckerboard(Even,tmp,in[b]);
-	RedBlackSolution(_Matrix,sol_o[b],tmp,out[b]);
-
-	/////////////////////////////////////////////////
-	// Check unprec residual if possible
-	/////////////////////////////////////////////////
-	if ( ! subGuess ) {
-	  _Matrix.M(out[b],resid); 
-	  resid = resid-in[b];
-	  RealD ns = norm2(in[b]);
-	  RealD nr = norm2(resid);
-	
-	  std::cout<<GridLogMessage<< "SchurRedBlackBase solver true unprec resid["<<b<<"] "<<std::sqrt(nr/ns) << std::endl;
-	} else {
-	  std::cout<<GridLogMessage<< "SchurRedBlackBase Guess subtracted after solve["<<b<<"] " << std::endl;
-	}
-
-      }
-    }
-    template<class Guesser>
+    template<class Matrix,class Guesser>
     void operator() (Matrix & _Matrix,const Field &in, Field &out,Guesser &guess){
 
       // FIXME CGdiagonalMee not implemented virtual function
@@ -210,42 +335,52 @@ namespace Grid {
       GridBase *grid = _Matrix.RedBlackGrid();
       GridBase *fgrid= _Matrix.Grid();
 
-      Field resid(fgrid);
-      Field src_o(grid);
+      SchurDiagTwoOperator<Matrix,Field> _HermOpEO(_Matrix);
+ 
       Field src_e(grid);
+      Field src_o(grid);
+      Field sol_e(grid);
       Field sol_o(grid);
+      Field   tmp(grid);
+      Field  Mtmp(grid);
+      Field resid(fgrid);
 
-      ////////////////////////////////////////////////
-      // RedBlack source
-      ////////////////////////////////////////////////
-      RedBlackSource(_Matrix,in,src_e,src_o);
+      pickCheckerboard(Even,src_e,in);
+      pickCheckerboard(Odd ,src_o,in);
+      pickCheckerboard(Even,sol_e,out);
+      pickCheckerboard(Odd ,sol_o,out);
+    
+      /////////////////////////////////////////////////////
+      // src_o = Mdag * (source_o - Moe MeeInv source_e)
+      /////////////////////////////////////////////////////
+      _Matrix.MooeeInv(src_e,tmp);     assert(  tmp.checkerboard ==Even);
+      _Matrix.Meooe   (tmp,Mtmp);      assert( Mtmp.checkerboard ==Odd);     
+      tmp=src_o-Mtmp;                  assert(  tmp.checkerboard ==Odd);     
 
-      ////////////////////////////////
-      // Construct the guess
-      ////////////////////////////////
-      if(useSolnAsInitGuess) {
-        pickCheckerboard(Odd, sol_o, out);
-      } else {
-        guess(src_o,sol_o);
-      }
-
-      Field  guess_save(grid);
-      guess_save = sol_o;
+      // get the right MpcDag
+      _HermOpEO.MpcDag(tmp,src_o);     assert(src_o.checkerboard ==Odd);       
 
       //////////////////////////////////////////////////////////////
       // Call the red-black solver
       //////////////////////////////////////////////////////////////
-      RedBlackSolve(_Matrix,src_o,sol_o);
-
-      ////////////////////////////////////////////////
+      std::cout<<GridLogMessage << "SchurRedBlack solver calling the MpcDagMp solver" <<std::endl;
+//      _HermitianRBSolver(_HermOpEO,src_o,sol_o);  assert(sol_o.checkerboard==Odd);
+      guess(src_o,tmp);
+      Mtmp = tmp;
+      _HermitianRBSolver(_HermOpEO,src_o,tmp);  assert(tmp.checkerboard==Odd);
       // Fionn A2A boolean behavioural control
-      ////////////////////////////////////////////////
-      if (subGuess)      sol_o= sol_o-guess_save;
+      if (subGuess)      tmp = tmp-Mtmp;
+      _Matrix.MooeeInv(tmp,sol_o);       assert(  sol_o.checkerboard   ==Odd);
 
       ///////////////////////////////////////////////////
-      // RedBlack solution needs the even source
+      // sol_e = M_ee^-1 * ( src_e - Meo sol_o )...
       ///////////////////////////////////////////////////
-      RedBlackSolution(_Matrix,sol_o,src_e,out);
+      _Matrix.Meooe(sol_o,tmp);        assert(  tmp.checkerboard   ==Even);
+      src_e = src_e-tmp;               assert(  src_e.checkerboard ==Even);
+      _Matrix.MooeeInv(src_e,sol_e);   assert(  sol_e.checkerboard ==Even);
+     
+      setCheckerboard(out,sol_e); assert(  sol_e.checkerboard ==Even);
+      setCheckerboard(out,sol_o); assert(  sol_o.checkerboard ==Odd );
 
       // Verify the unprec residual
       if ( ! subGuess ) {
@@ -254,368 +389,115 @@ namespace Grid {
         RealD ns = norm2(in);
         RealD nr = norm2(resid);
 
-        std::cout<<GridLogMessage << "SchurRedBlackBase solver true unprec resid "<< std::sqrt(nr/ns) << std::endl;
+        std::cout<<GridLogMessage << "SchurRedBlackDiagTwo solver true unprec resid "<< std::sqrt(nr/ns) <<" nr "<< nr <<" ns "<<ns << std::endl;
       } else {
-        std::cout << GridLogMessage << "SchurRedBlackBase Guess subtracted after solve." << std::endl;
+        std::cout << GridLogMessage << "Guess subtracted after solve." << std::endl;
       }
     }     
-    
-    /////////////////////////////////////////////////////////////
-    // Override in derived. 
-    /////////////////////////////////////////////////////////////
-    virtual void RedBlackSource  (Matrix & _Matrix,const Field &src, Field &src_e,Field &src_o)                =0;
-    virtual void RedBlackSolution(Matrix & _Matrix,const Field &sol_o, const Field &src_e,Field &sol)          =0;
-    virtual void RedBlackSolve   (Matrix & _Matrix,const Field &src_o, Field &sol_o)                           =0;
-    virtual void RedBlackSolve   (Matrix & _Matrix,const std::vector<Field> &src_o,  std::vector<Field> &sol_o)=0;
-
   };
-
-  template<class Field> class SchurRedBlackStaggeredSolve : public SchurRedBlackBase<Field> {
+  ///////////////////////////////////////////////////////////////////////////////////////////////////////
+  // Take a matrix and form a Red Black solver calling a Herm solver
+  // Use of RB info prevents making SchurRedBlackSolve conform to standard interface
+  ///////////////////////////////////////////////////////////////////////////////////////////////////////
+  template<class Field> class SchurRedBlackDiagTwoMixed {
+  private:
+    LinearFunction<Field> & _HermitianRBSolver;
+    int CBfactorise;
+    bool subGuess;
   public:
-    typedef CheckerBoardedSparseMatrixBase<Field> Matrix;
-
-    SchurRedBlackStaggeredSolve(OperatorFunction<Field> &HermitianRBSolver, const bool initSubGuess = false,
-        const bool _solnAsInitGuess = false) 
-      :    SchurRedBlackBase<Field> (HermitianRBSolver,initSubGuess,_solnAsInitGuess) 
-    {
-    }
-
-    //////////////////////////////////////////////////////
-    // Override RedBlack specialisation
-    //////////////////////////////////////////////////////
-    virtual void RedBlackSource(Matrix & _Matrix,const Field &src, Field &src_e,Field &src_o)
-    {
-      GridBase *grid = _Matrix.RedBlackGrid();
-      GridBase *fgrid= _Matrix.Grid();
-
-      Field   tmp(grid);
-      Field  Mtmp(grid);
-
-      pickCheckerboard(Even,src_e,src);
-      pickCheckerboard(Odd ,src_o,src);
-
-      /////////////////////////////////////////////////////
-      // src_o = (source_o - Moe MeeInv source_e)
-      /////////////////////////////////////////////////////
-      _Matrix.MooeeInv(src_e,tmp);     assert(  tmp.Checkerboard() ==Even);
-      _Matrix.Meooe   (tmp,Mtmp);      assert( Mtmp.Checkerboard() ==Odd);     
-      tmp=src_o-Mtmp;                  assert(  tmp.Checkerboard() ==Odd);     
-
-      _Matrix.Mooee(tmp,src_o); // Extra factor of "m" in source from dumb choice of matrix norm.
-    }
-    virtual void RedBlackSolution(Matrix & _Matrix,const Field &sol_o, const Field &src_e_c,Field &sol)
-    {
-      GridBase *grid = _Matrix.RedBlackGrid();
-      GridBase *fgrid= _Matrix.Grid();
-
-      Field   tmp(grid);
-      Field   sol_e(grid);
-      Field   src_e(grid);
-
-      src_e = src_e_c; // Const correctness
-
-      ///////////////////////////////////////////////////
-      // sol_e = M_ee^-1 * ( src_e - Meo sol_o )...
-      ///////////////////////////////////////////////////
-      _Matrix.Meooe(sol_o,tmp);        assert(  tmp.Checkerboard()   ==Even);
-      src_e = src_e-tmp;               assert(  src_e.Checkerboard() ==Even);
-      _Matrix.MooeeInv(src_e,sol_e);   assert(  sol_e.Checkerboard() ==Even);
-     
-      setCheckerboard(sol,sol_e); assert(  sol_e.Checkerboard() ==Even);
-      setCheckerboard(sol,sol_o); assert(  sol_o.Checkerboard() ==Odd );
-    }
-    virtual void RedBlackSolve   (Matrix & _Matrix,const Field &src_o, Field &sol_o)
-    {
-      SchurStaggeredOperator<Matrix,Field> _HermOpEO(_Matrix);
-      this->_HermitianRBSolver(_HermOpEO,src_o,sol_o);  assert(sol_o.Checkerboard()==Odd);
-    };
-    virtual void RedBlackSolve   (Matrix & _Matrix,const std::vector<Field> &src_o,  std::vector<Field> &sol_o)
-    {
-      SchurStaggeredOperator<Matrix,Field> _HermOpEO(_Matrix);
-      this->_HermitianRBSolver(_HermOpEO,src_o,sol_o); 
-    }
-  };
-  template<class Field> using SchurRedBlackStagSolve = SchurRedBlackStaggeredSolve<Field>;
-
-  ///////////////////////////////////////////////////////////////////////////////////////////////////////
-  // Site diagonal has Mooee on it.
-  ///////////////////////////////////////////////////////////////////////////////////////////////////////
-  template<class Field> class SchurRedBlackDiagMooeeSolve : public SchurRedBlackBase<Field> {
-  public:
-    typedef CheckerBoardedSparseMatrixBase<Field> Matrix;
-
-    SchurRedBlackDiagMooeeSolve(OperatorFunction<Field> &HermitianRBSolver, const bool initSubGuess = false,
-        const bool _solnAsInitGuess = false)  
-      : SchurRedBlackBase<Field> (HermitianRBSolver,initSubGuess,_solnAsInitGuess) {};
-
-
-    //////////////////////////////////////////////////////
-    // Override RedBlack specialisation
-    //////////////////////////////////////////////////////
-    virtual void RedBlackSource(Matrix & _Matrix,const Field &src, Field &src_e,Field &src_o)
-    {
-      GridBase *grid = _Matrix.RedBlackGrid();
-      GridBase *fgrid= _Matrix.Grid();
-
-      Field   tmp(grid);
-      Field  Mtmp(grid);
-
-      pickCheckerboard(Even,src_e,src);
-      pickCheckerboard(Odd ,src_o,src);
-
-      /////////////////////////////////////////////////////
-      // src_o = Mdag * (source_o - Moe MeeInv source_e)
-      /////////////////////////////////////////////////////
-      _Matrix.MooeeInv(src_e,tmp);     assert(  tmp.Checkerboard() ==Even);
-      _Matrix.Meooe   (tmp,Mtmp);      assert( Mtmp.Checkerboard() ==Odd);     
-      tmp=src_o-Mtmp;                  assert(  tmp.Checkerboard() ==Odd);     
-
-      // get the right MpcDag
-      SchurDiagMooeeOperator<Matrix,Field> _HermOpEO(_Matrix);
-      _HermOpEO.MpcDag(tmp,src_o);     assert(src_o.Checkerboard() ==Odd);       
-
-    }
-    virtual void RedBlackSolution(Matrix & _Matrix,const Field &sol_o, const Field &src_e,Field &sol)
-    {
-      GridBase *grid = _Matrix.RedBlackGrid();
-      GridBase *fgrid= _Matrix.Grid();
-
-      Field   tmp(grid);
-      Field  sol_e(grid);
-      Field  src_e_i(grid);
-      ///////////////////////////////////////////////////
-      // sol_e = M_ee^-1 * ( src_e - Meo sol_o )...
-      ///////////////////////////////////////////////////
-      _Matrix.Meooe(sol_o,tmp);          assert(  tmp.Checkerboard()   ==Even);
-      src_e_i = src_e-tmp;               assert(  src_e_i.Checkerboard() ==Even);
-      _Matrix.MooeeInv(src_e_i,sol_e);   assert(  sol_e.Checkerboard() ==Even);
-     
-      setCheckerboard(sol,sol_e); assert(  sol_e.Checkerboard() ==Even);
-      setCheckerboard(sol,sol_o); assert(  sol_o.Checkerboard() ==Odd );
-    }
-    virtual void RedBlackSolve   (Matrix & _Matrix,const Field &src_o, Field &sol_o)
-    {
-      SchurDiagMooeeOperator<Matrix,Field> _HermOpEO(_Matrix);
-      this->_HermitianRBSolver(_HermOpEO,src_o,sol_o);  assert(sol_o.Checkerboard()==Odd);
-    };
-    virtual void RedBlackSolve   (Matrix & _Matrix,const std::vector<Field> &src_o,  std::vector<Field> &sol_o)
-    {
-      SchurDiagMooeeOperator<Matrix,Field> _HermOpEO(_Matrix);
-      this->_HermitianRBSolver(_HermOpEO,src_o,sol_o); 
-    }
-  };
-
-  template<class Field> class NonHermitianSchurRedBlackDiagMooeeSolve : public SchurRedBlackBase<Field> 
-  {
-    public:
-      typedef CheckerBoardedSparseMatrixBase<Field> Matrix;
-
-      NonHermitianSchurRedBlackDiagMooeeSolve(OperatorFunction<Field>& RBSolver, const bool initSubGuess = false,
-          const bool _solnAsInitGuess = false)  
-      : SchurRedBlackBase<Field>(RBSolver, initSubGuess, _solnAsInitGuess) {};
-
-      //////////////////////////////////////////////////////
-      // Override RedBlack specialisation
-      //////////////////////////////////////////////////////
-      virtual void RedBlackSource(Matrix& _Matrix, const Field& src, Field& src_e, Field& src_o)
-      {
-        GridBase* grid  = _Matrix.RedBlackGrid();
-        GridBase* fgrid = _Matrix.Grid();
-
-        Field  tmp(grid);
-        Field Mtmp(grid);
-
-        pickCheckerboard(Even, src_e, src);
-        pickCheckerboard(Odd , src_o, src);
-
-        /////////////////////////////////////////////////////
-        // src_o = Mdag * (source_o - Moe MeeInv source_e)
-        /////////////////////////////////////////////////////
-        _Matrix.MooeeInv(src_e, tmp);   assert(   tmp.Checkerboard() == Even );
-        _Matrix.Meooe   (tmp, Mtmp);    assert(  Mtmp.Checkerboard() == Odd  );     
-        src_o -= Mtmp;                  assert( src_o.Checkerboard() == Odd  );     
-      }
-      
-      virtual void RedBlackSolution(Matrix& _Matrix, const Field& sol_o, const Field& src_e, Field& sol)
-      {
-        GridBase* grid  = _Matrix.RedBlackGrid();
-        GridBase* fgrid = _Matrix.Grid();
-
-        Field     tmp(grid);
-        Field   sol_e(grid);
-        Field src_e_i(grid);
-        
-        ///////////////////////////////////////////////////
-        // sol_e = M_ee^-1 * ( src_e - Meo sol_o )...
-        ///////////////////////////////////////////////////
-        _Matrix.Meooe(sol_o, tmp);         assert(     tmp.Checkerboard() == Even );
-        src_e_i = src_e - tmp;             assert( src_e_i.Checkerboard() == Even );
-        _Matrix.MooeeInv(src_e_i, sol_e);  assert(   sol_e.Checkerboard() == Even );
-       
-        setCheckerboard(sol, sol_e); assert( sol_e.Checkerboard() == Even );
-        setCheckerboard(sol, sol_o); assert( sol_o.Checkerboard() == Odd  );
-      }
-
-      virtual void RedBlackSolve(Matrix& _Matrix, const Field& src_o, Field& sol_o)
-      {
-        NonHermitianSchurDiagMooeeOperator<Matrix,Field> _OpEO(_Matrix);
-        this->_HermitianRBSolver(_OpEO, src_o, sol_o);  assert(sol_o.Checkerboard() == Odd);
-      }
-
-      virtual void RedBlackSolve(Matrix& _Matrix, const std::vector<Field>& src_o, std::vector<Field>& sol_o)
-      {
-        NonHermitianSchurDiagMooeeOperator<Matrix,Field> _OpEO(_Matrix);
-        this->_HermitianRBSolver(_OpEO, src_o, sol_o); 
-      }
-  };
-
-  ///////////////////////////////////////////////////////////////////////////////////////////////////////
-  // Site diagonal is identity, right preconditioned by Mee^inv
-  // ( 1 - Meo Moo^inv Moe Mee^inv  ) phi =( 1 - Meo Moo^inv Moe Mee^inv  ) Mee psi =  = eta  = eta
-  //=> psi = MeeInv phi
-  ///////////////////////////////////////////////////////////////////////////////////////////////////////
-  template<class Field> class SchurRedBlackDiagTwoSolve : public SchurRedBlackBase<Field> {
-  public:
-    typedef CheckerBoardedSparseMatrixBase<Field> Matrix;
 
     /////////////////////////////////////////////////////
     // Wrap the usual normal equations Schur trick
     /////////////////////////////////////////////////////
-  SchurRedBlackDiagTwoSolve(OperatorFunction<Field> &HermitianRBSolver, const bool initSubGuess = false,
-      const bool _solnAsInitGuess = false)  
-    : SchurRedBlackBase<Field>(HermitianRBSolver,initSubGuess,_solnAsInitGuess) {};
-
-    virtual void RedBlackSource(Matrix & _Matrix,const Field &src, Field &src_e,Field &src_o)
+  SchurRedBlackDiagTwoMixed(LinearFunction<Field> &HermitianRBSolver, const bool initSubGuess = false)  :
+     _HermitianRBSolver(HermitianRBSolver) 
+    { 
+      CBfactorise=0;
+      subtractGuess(initSubGuess);
+    };
+    void subtractGuess(const bool initSubGuess)
     {
+      subGuess = initSubGuess;
+    }
+    bool isSubtractGuess(void)
+    {
+      return subGuess;
+    }
+
+    template<class Matrix>
+    void operator() (Matrix & _Matrix,const Field &in, Field &out){
+      ZeroGuesser<Field> guess;
+      (*this)(_Matrix,in,out,guess);
+    }
+    template<class Matrix, class Guesser>
+    void operator() (Matrix & _Matrix,const Field &in, Field &out,Guesser &guess){
+
+      // FIXME CGdiagonalMee not implemented virtual function
+      // FIXME use CBfactorise to control schur decomp
       GridBase *grid = _Matrix.RedBlackGrid();
       GridBase *fgrid= _Matrix.Grid();
 
       SchurDiagTwoOperator<Matrix,Field> _HermOpEO(_Matrix);
-      
+ 
+      Field src_e(grid);
+      Field src_o(grid);
+      Field sol_e(grid);
+      Field sol_o(grid);
       Field   tmp(grid);
       Field  Mtmp(grid);
+      Field resid(fgrid);
 
-      pickCheckerboard(Even,src_e,src);
-      pickCheckerboard(Odd ,src_o,src);
+      pickCheckerboard(Even,src_e,in);
+      pickCheckerboard(Odd ,src_o,in);
+      pickCheckerboard(Even,sol_e,out);
+      pickCheckerboard(Odd ,sol_o,out);
     
       /////////////////////////////////////////////////////
       // src_o = Mdag * (source_o - Moe MeeInv source_e)
       /////////////////////////////////////////////////////
-      _Matrix.MooeeInv(src_e,tmp);     assert(  tmp.Checkerboard() ==Even);
-      _Matrix.Meooe   (tmp,Mtmp);      assert( Mtmp.Checkerboard() ==Odd);     
-      tmp=src_o-Mtmp;                  assert(  tmp.Checkerboard() ==Odd);     
+      _Matrix.MooeeInv(src_e,tmp);     assert(  tmp.checkerboard ==Even);
+      _Matrix.Meooe   (tmp,Mtmp);      assert( Mtmp.checkerboard ==Odd);     
+      tmp=src_o-Mtmp;                  assert(  tmp.checkerboard ==Odd);     
 
       // get the right MpcDag
-      _HermOpEO.MpcDag(tmp,src_o);     assert(src_o.Checkerboard() ==Odd);       
-    }
+      _HermOpEO.MpcDag(tmp,src_o);     assert(src_o.checkerboard ==Odd);       
 
-    virtual void RedBlackSolution(Matrix & _Matrix,const Field &sol_o, const Field &src_e,Field &sol)
-    {
-      GridBase *grid = _Matrix.RedBlackGrid();
-      GridBase *fgrid= _Matrix.Grid();
-
-      Field   sol_o_i(grid);
-      Field   tmp(grid);
-      Field   sol_e(grid);
-
-      ////////////////////////////////////////////////
-      // MooeeInv due to pecond
-      ////////////////////////////////////////////////
-      _Matrix.MooeeInv(sol_o,tmp);
-      sol_o_i = tmp;
+      //////////////////////////////////////////////////////////////
+      // Call the red-black solver
+      //////////////////////////////////////////////////////////////
+      std::cout<<GridLogMessage << "SchurRedBlack solver calling the MpcDagMp solver" <<std::endl;
+//      _HermitianRBSolver(_HermOpEO,src_o,sol_o);  assert(sol_o.checkerboard==Odd);
+//      _HermitianRBSolver(_HermOpEO,src_o,tmp);  assert(tmp.checkerboard==Odd);
+      guess(src_o,tmp);
+      Mtmp = tmp;
+      _HermitianRBSolver(_HermOpEO,src_o,tmp);  assert(tmp.checkerboard==Odd);
+      // Fionn A2A boolean behavioural control
+      if (subGuess)      tmp = tmp-Mtmp;
+      _Matrix.MooeeInv(tmp,sol_o);        assert(  sol_o.checkerboard   ==Odd);
 
       ///////////////////////////////////////////////////
       // sol_e = M_ee^-1 * ( src_e - Meo sol_o )...
       ///////////////////////////////////////////////////
-      _Matrix.Meooe(sol_o_i,tmp);    assert(  tmp.Checkerboard()   ==Even);
-      tmp = src_e-tmp;               assert(  src_e.Checkerboard() ==Even);
-      _Matrix.MooeeInv(tmp,sol_e);   assert(  sol_e.Checkerboard() ==Even);
+      _Matrix.Meooe(sol_o,tmp);        assert(  tmp.checkerboard   ==Even);
+      src_e = src_e-tmp;               assert(  src_e.checkerboard ==Even);
+      _Matrix.MooeeInv(src_e,sol_e);   assert(  sol_e.checkerboard ==Even);
      
-      setCheckerboard(sol,sol_e);    assert(  sol_e.Checkerboard() ==Even);
-      setCheckerboard(sol,sol_o_i);  assert(  sol_o_i.Checkerboard() ==Odd );
-    };
+      setCheckerboard(out,sol_e); assert(  sol_e.checkerboard ==Even);
+      setCheckerboard(out,sol_o); assert(  sol_o.checkerboard ==Odd );
 
-    virtual void RedBlackSolve   (Matrix & _Matrix,const Field &src_o, Field &sol_o)
-    {
-      SchurDiagTwoOperator<Matrix,Field> _HermOpEO(_Matrix);
-      this->_HermitianRBSolver(_HermOpEO,src_o,sol_o);
-    };
-    virtual void RedBlackSolve   (Matrix & _Matrix,const std::vector<Field> &src_o,  std::vector<Field> &sol_o)
-    {
-      SchurDiagTwoOperator<Matrix,Field> _HermOpEO(_Matrix);
-      this->_HermitianRBSolver(_HermOpEO,src_o,sol_o); 
-    }
+      // Verify the unprec residual
+      if ( ! subGuess ) {
+        _Matrix.M(out,resid); 
+        resid = resid-in;
+        RealD ns = norm2(in);
+        RealD nr = norm2(resid);
+
+        std::cout << GridLogMessage << "SchurRedBlackDiagTwo solver true unprec resid " << std::sqrt(nr / ns) << " nr " << nr << " ns " << ns << std::endl;
+      } else {
+        std::cout << GridLogMessage << "Guess subtracted after solve." << std::endl;
+      }
+    }     
   };
 
-  template<class Field> class NonHermitianSchurRedBlackDiagTwoSolve : public SchurRedBlackBase<Field> 
-  {
-    public:
-      typedef CheckerBoardedSparseMatrixBase<Field> Matrix;
-
-      /////////////////////////////////////////////////////
-      // Wrap the usual normal equations Schur trick
-      /////////////////////////////////////////////////////
-      NonHermitianSchurRedBlackDiagTwoSolve(OperatorFunction<Field>& RBSolver, const bool initSubGuess = false,
-          const bool _solnAsInitGuess = false)  
-      : SchurRedBlackBase<Field>(RBSolver, initSubGuess, _solnAsInitGuess) {};
-
-      virtual void RedBlackSource(Matrix& _Matrix, const Field& src, Field& src_e, Field& src_o)
-      {
-        GridBase* grid  = _Matrix.RedBlackGrid();
-        GridBase* fgrid = _Matrix.Grid();
-
-        Field  tmp(grid);
-        Field Mtmp(grid);
-
-        pickCheckerboard(Even, src_e, src);
-        pickCheckerboard(Odd , src_o, src);
-      
-        /////////////////////////////////////////////////////
-        // src_o = Mdag * (source_o - Moe MeeInv source_e)
-        /////////////////////////////////////////////////////
-        _Matrix.MooeeInv(src_e, tmp);   assert(   tmp.Checkerboard() == Even );
-        _Matrix.Meooe   (tmp, Mtmp);    assert(  Mtmp.Checkerboard() == Odd  );     
-        src_o -= Mtmp;                  assert( src_o.Checkerboard() == Odd  );     
-      }
-
-      virtual void RedBlackSolution(Matrix& _Matrix, const Field& sol_o, const Field& src_e, Field& sol)
-      {
-        GridBase* grid  = _Matrix.RedBlackGrid();
-        GridBase* fgrid = _Matrix.Grid();
-
-        Field sol_o_i(grid);
-        Field     tmp(grid);
-        Field   sol_e(grid);
-
-        ////////////////////////////////////////////////
-        // MooeeInv due to pecond
-        ////////////////////////////////////////////////
-        _Matrix.MooeeInv(sol_o, tmp);
-        sol_o_i = tmp;
-
-        ///////////////////////////////////////////////////
-        // sol_e = M_ee^-1 * ( src_e - Meo sol_o )...
-        ///////////////////////////////////////////////////
-        _Matrix.Meooe(sol_o_i, tmp);    assert(   tmp.Checkerboard() == Even );
-        tmp = src_e - tmp;              assert( src_e.Checkerboard() == Even );
-        _Matrix.MooeeInv(tmp, sol_e);   assert( sol_e.Checkerboard() == Even );
-       
-        setCheckerboard(sol, sol_e);    assert(   sol_e.Checkerboard() == Even );
-        setCheckerboard(sol, sol_o_i);  assert( sol_o_i.Checkerboard() == Odd  );
-      };
-
-      virtual void RedBlackSolve(Matrix& _Matrix, const Field& src_o, Field& sol_o)
-      {
-        NonHermitianSchurDiagTwoOperator<Matrix,Field> _OpEO(_Matrix);
-        this->_HermitianRBSolver(_OpEO, src_o, sol_o);
-      };
-
-      virtual void RedBlackSolve(Matrix& _Matrix, const std::vector<Field>& src_o,  std::vector<Field>& sol_o)
-      {
-        NonHermitianSchurDiagTwoOperator<Matrix,Field> _OpEO(_Matrix);
-        this->_HermitianRBSolver(_OpEO, src_o, sol_o); 
-      }
-  };
 }
-
 #endif

Grid/allocator/AlignedAllocator.cc

@@ -1,44 +1,19 @@
 #include <Grid/GridCore.h>
 #include <fcntl.h>
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 MemoryStats *MemoryProfiler::stats = nullptr;
 bool         MemoryProfiler::debug = false;
 
-int PointerCache::NcacheSmall = PointerCache::NcacheSmallMax;
-#ifdef GRID_CUDA
-int PointerCache::Ncache      = 32;
-#else 
-int PointerCache::Ncache      = 8;
-#endif
-int PointerCache::Victim;
-int PointerCache::VictimSmall;
-PointerCache::PointerCacheEntry PointerCache::Entries[PointerCache::NcacheMax];
-PointerCache::PointerCacheEntry PointerCache::EntriesSmall[PointerCache::NcacheSmallMax];
+int PointerCache::victim;
 
-void PointerCache::Init(void)
-{
-  char * str;
+PointerCache::PointerCacheEntry PointerCache::Entries[PointerCache::Ncache];
 
-  str= getenv("GRID_ALLOC_NCACHE_LARGE");
-  if ( str ) Ncache = atoi(str);
-  if ( (Ncache<0) || (Ncache > NcacheMax)) Ncache = NcacheMax;
+void *PointerCache::Insert(void *ptr,size_t bytes) {
 
-  str= getenv("GRID_ALLOC_NCACHE_SMALL");
-  if ( str ) NcacheSmall = atoi(str);
-  if ( (NcacheSmall<0) || (NcacheSmall > NcacheSmallMax)) NcacheSmall = NcacheSmallMax;
+  if (bytes < 4096 ) return ptr;
 
-  //  printf("Aligned alloocator cache: large %d/%d small %d/%d\n",Ncache,NcacheMax,NcacheSmall,NcacheSmallMax);
-}
-void *PointerCache::Insert(void *ptr,size_t bytes) 
-{
-  if (bytes < GRID_ALLOC_SMALL_LIMIT ) 
-    return Insert(ptr,bytes,EntriesSmall,NcacheSmall,VictimSmall);
-  return Insert(ptr,bytes,Entries,Ncache,Victim);  
-}
-void *PointerCache::Insert(void *ptr,size_t bytes,PointerCacheEntry *entries,int ncache,int &victim) 
-{
 #ifdef GRID_OMP
   assert(omp_in_parallel()==0);
 #endif 
@@ -46,8 +21,8 @@ void *PointerCache::Insert(void *ptr,size_t bytes,PointerCacheEntry *entries,int
   void * ret = NULL;
   int v = -1;
 
-  for(int e=0;e<ncache;e++) {
-    if ( entries[e].valid==0 ) {
+  for(int e=0;e<Ncache;e++) {
+    if ( Entries[e].valid==0 ) {
       v=e; 
       break;
     }
@@ -55,38 +30,35 @@ void *PointerCache::Insert(void *ptr,size_t bytes,PointerCacheEntry *entries,int
 
   if ( v==-1 ) {
     v=victim;
-    victim = (victim+1)%ncache;
+    victim = (victim+1)%Ncache;
   }
 
-  if ( entries[v].valid ) {
-    ret = entries[v].address;
-    entries[v].valid = 0;
-    entries[v].address = NULL;
-    entries[v].bytes = 0;
+  if ( Entries[v].valid ) {
+    ret = Entries[v].address;
+    Entries[v].valid = 0;
+    Entries[v].address = NULL;
+    Entries[v].bytes = 0;
   }
 
-  entries[v].address=ptr;
-  entries[v].bytes  =bytes;
-  entries[v].valid  =1;
+  Entries[v].address=ptr;
+  Entries[v].bytes  =bytes;
+  Entries[v].valid  =1;
 
   return ret;
 }
 
-void *PointerCache::Lookup(size_t bytes)
-{
-  if (bytes < GRID_ALLOC_SMALL_LIMIT ) 
-    return Lookup(bytes,EntriesSmall,NcacheSmall);
-  return Lookup(bytes,Entries,Ncache);
-}
-void *PointerCache::Lookup(size_t bytes,PointerCacheEntry *entries,int ncache) 
-{
-#ifdef GRID_OMP
+void *PointerCache::Lookup(size_t bytes) {
+
+ if (bytes < 4096 ) return NULL;
+
+#ifdef _OPENMP
   assert(omp_in_parallel()==0);
 #endif 
-  for(int e=0;e<ncache;e++){
-    if ( entries[e].valid && ( entries[e].bytes == bytes ) ) {
-      entries[e].valid = 0;
-      return entries[e].address;
+
+  for(int e=0;e<Ncache;e++){
+    if ( Entries[e].valid && ( Entries[e].bytes == bytes ) ) {
+      Entries[e].valid = 0;
+      return Entries[e].address;
     }
   }
   return NULL;
@@ -118,7 +90,7 @@ void check_huge_pages(void *Buf,uint64_t BYTES)
       ++n4ktotal;
       if (pageaddr != baseaddr + j * page_size)
 	++nnothuge;
-    }
+      }
   }
   int rank = CartesianCommunicator::RankWorld();
   printf("rank %d Allocated %d 4k pages, %d not in huge pages\n", rank, n4ktotal, nnothuge);
@@ -134,21 +106,20 @@ std::string sizeString(const size_t bytes)
   double                 count = bytes;
   
   while (count >= 1024 && s < 7)
-    {
+  {
       s++;
       count /= 1024;
-    }
+  }
   if (count - floor(count) == 0.0)
-    {
+  {
       snprintf(buf, bufSize, "%d %sB", (int)count, suffixes[s]);
-    }
+  }
   else
-    {
+  {
       snprintf(buf, bufSize, "%.1f %sB", count, suffixes[s]);
-    }
+  }
   
   return std::string(buf);
 }
 
-NAMESPACE_END(Grid);
-
+}

Grid/allocator/AlignedAllocator.h

@@ -24,8 +24,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_ALIGNED_ALLOCATOR_H
 #define GRID_ALIGNED_ALLOCATOR_H
 
@@ -40,110 +40,89 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 #include <mm_malloc.h>
 #endif
 
-#define POINTER_CACHE
-#define GRID_ALLOC_ALIGN (2*1024*1024)
-#define GRID_ALLOC_SMALL_LIMIT (4096)
+namespace Grid {
 
-NAMESPACE_BEGIN(Grid);
+  class PointerCache {
+  private:
 
-// Move control to configure.ac and Config.h?
+    static const int Ncache=8;
+    static int victim;
 
-class PointerCache {
-private:
-/*Pinning pages is costly*/
-/*Could maintain separate large and small allocation caches*/
-/* Could make these configurable, perhaps up to a max size*/
-  static const int NcacheSmallMax=128; 
-  static const int NcacheMax=16;
-  static int NcacheSmall;
-  static int Ncache;
-
-  typedef struct { 
-    void *address;
-    size_t bytes;
-    int valid;
-  } PointerCacheEntry;
+    typedef struct { 
+      void *address;
+      size_t bytes;
+      int valid;
+    } PointerCacheEntry;
     
-  static PointerCacheEntry Entries[NcacheMax];
-  static int Victim;
-  static PointerCacheEntry EntriesSmall[NcacheSmallMax];
-  static int VictimSmall;
+    static PointerCacheEntry Entries[Ncache];
 
-public:
-  static void Init(void);
-  static void *Insert(void *ptr,size_t bytes) ;
-  static void *Insert(void *ptr,size_t bytes,PointerCacheEntry *entries,int ncache,int &victim) ;
-  static void *Lookup(size_t bytes) ;
-  static void *Lookup(size_t bytes,PointerCacheEntry *entries,int ncache) ;
-};
+  public:
 
-std::string sizeString(size_t bytes);
 
-struct MemoryStats
-{
-  size_t totalAllocated{0}, maxAllocated{0}, 
-    currentlyAllocated{0}, totalFreed{0};
-};
+    static void *Insert(void *ptr,size_t bytes) ;
+    static void *Lookup(size_t bytes) ;
+
+  };
+  
+  std::string sizeString(size_t bytes);
+
+  struct MemoryStats
+  {
+    size_t totalAllocated{0}, maxAllocated{0}, 
+           currentlyAllocated{0}, totalFreed{0};
+  };
     
-class MemoryProfiler
-{
-public:
-  static MemoryStats *stats;
-  static bool        debug;
-};
+  class MemoryProfiler
+  {
+  public:
+    static MemoryStats *stats;
+    static bool        debug;
+  };
 
-#ifdef GRID_NVCC
-#define profilerCudaMeminfo \
-  { size_t f, t ; cudaMemGetInfo ( &f,&t); std::cout << GridLogDebug << "[Memory debug] Cuda free "<<f<<"/"<<t << std::endl;}
-#else
-#define profilerCudaMeminfo
-#endif
+  #define memString(bytes) std::to_string(bytes) + " (" + sizeString(bytes) + ")"
+  #define profilerDebugPrint \
+  if (MemoryProfiler::stats)\
+  {\
+    auto s = MemoryProfiler::stats;\
+    std::cout << GridLogDebug << "[Memory debug] Stats " << MemoryProfiler::stats << std::endl;\
+    std::cout << GridLogDebug << "[Memory debug] total  : " << memString(s->totalAllocated) \
+              << std::endl;\
+    std::cout << GridLogDebug << "[Memory debug] max    : " << memString(s->maxAllocated) \
+              << std::endl;\
+    std::cout << GridLogDebug << "[Memory debug] current: " << memString(s->currentlyAllocated) \
+              << std::endl;\
+    std::cout << GridLogDebug << "[Memory debug] freed  : " << memString(s->totalFreed) \
+              << std::endl;\
+  }
 
-#define memString(bytes) std::to_string(bytes) + " (" + sizeString(bytes) + ")"
-#define profilerDebugPrint						\
-  if (MemoryProfiler::stats)						\
-    {									\
-      auto s = MemoryProfiler::stats;					\
-      std::cout << GridLogDebug << "[Memory debug] Stats " << MemoryProfiler::stats << std::endl; \
-      std::cout << GridLogDebug << "[Memory debug] total  : " << memString(s->totalAllocated) \
-		<< std::endl;						\
-      std::cout << GridLogDebug << "[Memory debug] max    : " << memString(s->maxAllocated) \
-		<< std::endl;						\
-      std::cout << GridLogDebug << "[Memory debug] current: " << memString(s->currentlyAllocated) \
-		<< std::endl;						\
-      std::cout << GridLogDebug << "[Memory debug] freed  : " << memString(s->totalFreed) \
-		<< std::endl;						\
-    }									\
-  profilerCudaMeminfo;
+  #define profilerAllocate(bytes)\
+  if (MemoryProfiler::stats)\
+  {\
+    auto s = MemoryProfiler::stats;\
+    s->totalAllocated     += (bytes);\
+    s->currentlyAllocated += (bytes);\
+    s->maxAllocated        = std::max(s->maxAllocated, s->currentlyAllocated);\
+  }\
+  if (MemoryProfiler::debug)\
+  {\
+    std::cout << GridLogDebug << "[Memory debug] allocating " << memString(bytes) << std::endl;\
+    profilerDebugPrint;\
+  }
 
-#define profilerAllocate(bytes)						\
-  if (MemoryProfiler::stats)						\
-    {									\
-      auto s = MemoryProfiler::stats;					\
-      s->totalAllocated     += (bytes);					\
-      s->currentlyAllocated += (bytes);					\
-      s->maxAllocated        = std::max(s->maxAllocated, s->currentlyAllocated); \
-    }									\
-  if (MemoryProfiler::debug)						\
-    {									\
-      std::cout << GridLogDebug << "[Memory debug] allocating " << memString(bytes) << std::endl; \
-      profilerDebugPrint;						\
-    }
+  #define profilerFree(bytes)\
+  if (MemoryProfiler::stats)\
+  {\
+    auto s = MemoryProfiler::stats;\
+    s->totalFreed         += (bytes);\
+    s->currentlyAllocated -= (bytes);\
+  }\
+  if (MemoryProfiler::debug)\
+  {\
+    std::cout << GridLogDebug << "[Memory debug] freeing " << memString(bytes) << std::endl;\
+    profilerDebugPrint;\
+  }
 
-#define profilerFree(bytes)						\
-  if (MemoryProfiler::stats)						\
-    {									\
-      auto s = MemoryProfiler::stats;					\
-      s->totalFreed         += (bytes);					\
-      s->currentlyAllocated -= (bytes);					\
-    }									\
-  if (MemoryProfiler::debug)						\
-    {									\
-      std::cout << GridLogDebug << "[Memory debug] freeing " << memString(bytes) << std::endl; \
-      profilerDebugPrint;						\
-    }
-
-void check_huge_pages(void *Buf,uint64_t BYTES);
+  void check_huge_pages(void *Buf,uint64_t BYTES);
 
 ////////////////////////////////////////////////////////////////////
 // A lattice of something, but assume the something is SIMDized.
@@ -173,46 +152,29 @@ public:
     size_type bytes = __n*sizeof(_Tp);
     profilerAllocate(bytes);
 
-
-#ifdef POINTER_CACHE
     _Tp *ptr = (_Tp *) PointerCache::Lookup(bytes);
-#else
-    pointer ptr = nullptr;
-#endif
+    //    if ( ptr != NULL ) 
+    //      std::cout << "alignedAllocator "<<__n << " cache hit "<< std::hex << ptr <<std::dec <<std::endl;
 
-#ifdef GRID_NVCC
-    ////////////////////////////////////
-    // Unified (managed) memory
-    ////////////////////////////////////
-    if ( ptr == (_Tp *) NULL ) {
-      //      printf(" alignedAllocater cache miss %ld bytes ",bytes);      BACKTRACEFP(stdout);
-      auto err = cudaMallocManaged((void **)&ptr,bytes);
-      if( err != cudaSuccess ) {
-	ptr = (_Tp *) NULL;
-	std::cerr << " cudaMallocManaged failed for " << bytes<<" bytes " <<cudaGetErrorString(err)<< std::endl;
-	assert(0);
-      }
-    } 
-    assert( ptr != (_Tp *)NULL);
-#else 
-    //////////////////////////////////////////////////////////////////////////////////////////
-    // 2MB align; could make option probably doesn't need configurability
-    //////////////////////////////////////////////////////////////////////////////////////////
-  #ifdef HAVE_MM_MALLOC_H
+    //////////////////
+    // Hack 2MB align; could make option probably doesn't need configurability
+    //////////////////
+//define GRID_ALLOC_ALIGN (128)
+#define GRID_ALLOC_ALIGN (2*1024*1024)
+#ifdef HAVE_MM_MALLOC_H
     if ( ptr == (_Tp *) NULL ) ptr = (_Tp *) _mm_malloc(bytes,GRID_ALLOC_ALIGN);
-  #else
+#else
     if ( ptr == (_Tp *) NULL ) ptr = (_Tp *) memalign(GRID_ALLOC_ALIGN,bytes);
-  #endif
-    assert( ptr != (_Tp *)NULL);
-
-    //////////////////////////////////////////////////
-    // First touch optimise in threaded loop 
-    //////////////////////////////////////////////////
-    uint64_t *cp = (uint64_t *)ptr;
-    thread_for(n,bytes/sizeof(uint64_t), { // need only one touch per page
-      cp[n]=0;
-    });
 #endif
+    //    std::cout << "alignedAllocator " << std::hex << ptr <<std::dec <<std::endl;
+    // First touch optimise in threaded loop
+    uint8_t *cp = (uint8_t *)ptr;
+#ifdef GRID_OMP
+#pragma omp parallel for
+#endif
+    for(size_type n=0;n<bytes;n+=4096){
+      cp[n]=0;
+    }
     return ptr;
   }
 
@@ -221,40 +183,133 @@ public:
 
     profilerFree(bytes);
 
-#ifdef POINTER_CACHE
     pointer __freeme = (pointer)PointerCache::Insert((void *)__p,bytes);
-#else 
-    pointer __freeme = __p;
-#endif
 
-#ifdef GRID_NVCC
-    if ( __freeme ) cudaFree((void *)__freeme);
-#else 
-  #ifdef HAVE_MM_MALLOC_H
+#ifdef HAVE_MM_MALLOC_H
     if ( __freeme ) _mm_free((void *)__freeme); 
-  #else
+#else
     if ( __freeme ) free((void *)__freeme);
-  #endif
 #endif
   }
-
-  // FIXME: hack for the copy constructor, eventually it must be avoided
-  void construct(pointer __p, const _Tp& __val) { new((void *)__p) _Tp(__val); };
-  //void construct(pointer __p, const _Tp& __val) { };
+  void construct(pointer __p, const _Tp& __val) { };
   void construct(pointer __p) { };
   void destroy(pointer __p) { };
 };
 template<typename _Tp>  inline bool operator==(const alignedAllocator<_Tp>&, const alignedAllocator<_Tp>&){ return true; }
 template<typename _Tp>  inline bool operator!=(const alignedAllocator<_Tp>&, const alignedAllocator<_Tp>&){ return false; }
 
+//////////////////////////////////////////////////////////////////////////////////////////
+// MPI3 : comms must use shm region
+// SHMEM: comms must use symmetric heap
+//////////////////////////////////////////////////////////////////////////////////////////
+#ifdef GRID_COMMS_SHMEM
+extern "C" { 
+#include <mpp/shmem.h>
+extern void * shmem_align(size_t, size_t);
+extern void  shmem_free(void *);
+}
+#define PARANOID_SYMMETRIC_HEAP
+#endif
+
+template<typename _Tp>
+class commAllocator {
+public: 
+  typedef std::size_t     size_type;
+  typedef std::ptrdiff_t  difference_type;
+  typedef _Tp*       pointer;
+  typedef const _Tp* const_pointer;
+  typedef _Tp&       reference;
+  typedef const _Tp& const_reference;
+  typedef _Tp        value_type;
+
+  template<typename _Tp1>  struct rebind { typedef commAllocator<_Tp1> other; };
+  commAllocator() throw() { }
+  commAllocator(const commAllocator&) throw() { }
+  template<typename _Tp1> commAllocator(const commAllocator<_Tp1>&) throw() { }
+  ~commAllocator() throw() { }
+  pointer       address(reference __x)       const { return &__x; }
+  size_type  max_size() const throw() { return size_t(-1) / sizeof(_Tp); }
+
+#ifdef GRID_COMMS_SHMEM
+  pointer allocate(size_type __n, const void* _p= 0)
+  {
+    size_type bytes = __n*sizeof(_Tp);
+
+    profilerAllocate(bytes);
+#ifdef CRAY
+    _Tp *ptr = (_Tp *) shmem_align(bytes,64);
+#else
+    _Tp *ptr = (_Tp *) shmem_align(64,bytes);
+#endif
+#ifdef PARANOID_SYMMETRIC_HEAP
+    static void * bcast;
+    static long  psync[_SHMEM_REDUCE_SYNC_SIZE];
+
+    bcast = (void *) ptr;
+    shmem_broadcast32((void *)&bcast,(void *)&bcast,sizeof(void *)/4,0,0,0,shmem_n_pes(),psync);
+
+    if ( bcast != ptr ) {
+      std::printf("inconsistent alloc pe %d %lx %lx \n",shmem_my_pe(),bcast,ptr);std::fflush(stdout);
+      //      BACKTRACEFILE();
+      exit(0);
+    }
+    assert( bcast == (void *) ptr);
+#endif 
+    return ptr;
+  }
+  void deallocate(pointer __p, size_type __n) { 
+    size_type bytes = __n*sizeof(_Tp);
+
+    profilerFree(bytes);
+    shmem_free((void *)__p);
+  }
+#else
+  pointer allocate(size_type __n, const void* _p= 0) 
+  {
+    size_type bytes = __n*sizeof(_Tp);
+    
+    profilerAllocate(bytes);
+#ifdef HAVE_MM_MALLOC_H
+    _Tp * ptr = (_Tp *) _mm_malloc(bytes, GRID_ALLOC_ALIGN);
+#else
+    _Tp * ptr = (_Tp *) memalign(GRID_ALLOC_ALIGN, bytes);
+#endif
+    uint8_t *cp = (uint8_t *)ptr;
+    if ( ptr ) { 
+    // One touch per 4k page, static OMP loop to catch same loop order
+#ifdef GRID_OMP
+#pragma omp parallel for schedule(static)
+#endif
+      for(size_type n=0;n<bytes;n+=4096){
+	cp[n]=0;
+      }
+    }
+    return ptr;
+  }
+  void deallocate(pointer __p, size_type __n) {
+    size_type bytes = __n*sizeof(_Tp);
+
+    profilerFree(bytes);
+#ifdef HAVE_MM_MALLOC_H
+    _mm_free((void *)__p); 
+#else
+    free((void *)__p);
+#endif
+  }
+#endif
+  void construct(pointer __p, const _Tp& __val) { };
+  void construct(pointer __p) { };
+  void destroy(pointer __p) { };
+};
+template<typename _Tp>  inline bool operator==(const commAllocator<_Tp>&, const commAllocator<_Tp>&){ return true; }
+template<typename _Tp>  inline bool operator!=(const commAllocator<_Tp>&, const commAllocator<_Tp>&){ return false; }
+
 ////////////////////////////////////////////////////////////////////////////////
 // Template typedefs
 ////////////////////////////////////////////////////////////////////////////////
-template<class T> using commAllocator = alignedAllocator<T>;
 template<class T> using Vector     = std::vector<T,alignedAllocator<T> >;           
-template<class T> using commVector = std::vector<T,alignedAllocator<T> >;
+template<class T> using commVector = std::vector<T,commAllocator<T> >;              
 template<class T> using Matrix     = std::vector<std::vector<T,alignedAllocator<T> > >;
-
-NAMESPACE_END(Grid);
-
+    
+}; // namespace Grid
 #endif

Grid/cartesian/Cartesian.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,8 +23,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_CARTESIAN_H
 #define GRID_CARTESIAN_H
 

Grid/cartesian/Cartesian_base.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -25,266 +25,268 @@
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_CARTESIAN_BASE_H
 #define GRID_CARTESIAN_BASE_H
 
-NAMESPACE_BEGIN(Grid);
 
-//////////////////////////////////////////////////////////////////////
-// Commicator provides information on the processor grid
-//////////////////////////////////////////////////////////////////////
-//    unsigned long _ndimension;
-//    Coordinate _processors; // processor grid
-//    int              _processor;  // linear processor rank
-//    Coordinate _processor_coor;  // linear processor rank
-//////////////////////////////////////////////////////////////////////
-class GridBase : public CartesianCommunicator , public GridThread {
+namespace Grid{
+
+  //////////////////////////////////////////////////////////////////////
+  // Commicator provides information on the processor grid
+  //////////////////////////////////////////////////////////////////////
+  //    unsigned long _ndimension;
+  //    std::vector<int> _processors; // processor grid
+  //    int              _processor;  // linear processor rank
+  //    std::vector<int> _processor_coor;  // linear processor rank
+  //////////////////////////////////////////////////////////////////////
+  class GridBase : public CartesianCommunicator , public GridThread {
 
 public:
-  int dummy;
-  // Give Lattice access
-  template<class object> friend class Lattice;
+    int dummy;
+    // Give Lattice access
+    template<class object> friend class Lattice;
 
-  GridBase(const Coordinate & processor_grid) : CartesianCommunicator(processor_grid) { LocallyPeriodic=0;}; 
+    GridBase(const std::vector<int> & processor_grid) : CartesianCommunicator(processor_grid) {};
+    GridBase(const std::vector<int> & processor_grid,
+	     const CartesianCommunicator &parent,
+	     int &split_rank) 
+      : CartesianCommunicator(processor_grid,parent,split_rank) {};
+    GridBase(const std::vector<int> & processor_grid,
+	     const CartesianCommunicator &parent) 
+      : CartesianCommunicator(processor_grid,parent,dummy) {};
 
-  GridBase(const Coordinate & processor_grid,
-	   const CartesianCommunicator &parent,
-	   int &split_rank) 
-    : CartesianCommunicator(processor_grid,parent,split_rank) {LocallyPeriodic=0;};
+    virtual ~GridBase() = default;
 
-  GridBase(const Coordinate & processor_grid,
-	   const CartesianCommunicator &parent) 
-    : CartesianCommunicator(processor_grid,parent,dummy) {LocallyPeriodic=0;};
 
-  virtual ~GridBase() = default;
+    // Physics Grid information.
+    std::vector<int> _simd_layout;// Which dimensions get relayed out over simd lanes.
+    std::vector<int> _fdimensions;// (full) Global dimensions of array prior to cb removal
+    std::vector<int> _gdimensions;// Global dimensions of array after cb removal
+    std::vector<int> _ldimensions;// local dimensions of array with processor images removed
+    std::vector<int> _rdimensions;// Reduced local dimensions with simd lane images and processor images removed 
+    std::vector<int> _ostride;    // Outer stride for each dimension
+    std::vector<int> _istride;    // Inner stride i.e. within simd lane
+    int _osites;                  // _isites*_osites = product(dimensions).
+    int _isites;
+    int _fsites;                  // _isites*_osites = product(dimensions).
+    int _gsites;
+    std::vector<int> _slice_block;// subslice information
+    std::vector<int> _slice_stride;
+    std::vector<int> _slice_nblock;
 
-  // Physics Grid information.
-  Coordinate _simd_layout;// Which dimensions get relayed out over simd lanes.
-  Coordinate _fdimensions;// (full) Global dimensions of array prior to cb removal
-  Coordinate _gdimensions;// Global dimensions of array after cb removal
-  Coordinate _ldimensions;// local dimensions of array with processor images removed
-  Coordinate _rdimensions;// Reduced local dimensions with simd lane images and processor images removed 
-  Coordinate _ostride;    // Outer stride for each dimension
-  Coordinate _istride;    // Inner stride i.e. within simd lane
-  int _osites;                  // _isites*_osites = product(dimensions).
-  int _isites;
-  int _fsites;                  // _isites*_osites = product(dimensions).
-  int _gsites;
-  Coordinate _slice_block;// subslice information
-  Coordinate _slice_stride;
-  Coordinate _slice_nblock;
+    std::vector<int> _lstart;     // local start of array in gcoors _processor_coor[d]*_ldimensions[d]
+    std::vector<int> _lend  ;     // local end of array in gcoors   _processor_coor[d]*_ldimensions[d]+_ldimensions_[d]-1
 
-  Coordinate _lstart;     // local start of array in gcoors _processor_coor[d]*_ldimensions[d]
-  Coordinate _lend  ;     // local end of array in gcoors   _processor_coor[d]*_ldimensions[d]+_ldimensions_[d]-1
-
-  bool _isCheckerBoarded; 
-  int        LocallyPeriodic;
+    bool _isCheckerBoarded; 
 
 public:
 
-  ////////////////////////////////////////////////////////////////
-  // Checkerboarding interface is virtual and overridden by 
-  // GridCartesian / GridRedBlackCartesian
-  ////////////////////////////////////////////////////////////////
-  virtual int CheckerBoarded(int dim)=0;
-  virtual int CheckerBoard(const Coordinate &site)=0;
-  virtual int CheckerBoardDestination(int source_cb,int shift,int dim)=0;
-  virtual int CheckerBoardShift(int source_cb,int dim,int shift,int osite)=0;
-  virtual int CheckerBoardShiftForCB(int source_cb,int dim,int shift,int cb)=0;
-  virtual int CheckerBoardFromOindex (int Oindex)=0;
-  virtual int CheckerBoardFromOindexTable (int Oindex)=0;
+    ////////////////////////////////////////////////////////////////
+    // Checkerboarding interface is virtual and overridden by 
+    // GridCartesian / GridRedBlackCartesian
+    ////////////////////////////////////////////////////////////////
+    virtual int CheckerBoarded(int dim)=0;
+    virtual int CheckerBoard(const std::vector<int> &site)=0;
+    virtual int CheckerBoardDestination(int source_cb,int shift,int dim)=0;
+    virtual int CheckerBoardShift(int source_cb,int dim,int shift,int osite)=0;
+    virtual int CheckerBoardShiftForCB(int source_cb,int dim,int shift,int cb)=0;
+    virtual int CheckerBoardFromOindex (int Oindex)=0;
+    virtual int CheckerBoardFromOindexTable (int Oindex)=0;
 
-  //////////////////////////////////////////////////////////////////////////////////////////////
-  // Local layout calculations
-  //////////////////////////////////////////////////////////////////////////////////////////////
-  // These routines are key. Subdivide the linearised cartesian index into
-  //      "inner" index identifying which simd lane of object<vFcomplex> is associated with coord
-  //      "outer" index identifying which element of _odata in class "Lattice" is associated with coord.
-  //
-  // Compared to, say, Blitz++ we simply need to store BOTH an inner stride and an outer
-  // stride per dimension. The cost of evaluating the indexing information is doubled for an n-dimensional
-  // coordinate. Note, however, for data parallel operations the "inner" indexing cost is not paid and all
-  // lanes are operated upon simultaneously.
+    //////////////////////////////////////////////////////////////////////////////////////////////
+    // Local layout calculations
+    //////////////////////////////////////////////////////////////////////////////////////////////
+    // These routines are key. Subdivide the linearised cartesian index into
+    //      "inner" index identifying which simd lane of object<vFcomplex> is associated with coord
+    //      "outer" index identifying which element of _odata in class "Lattice" is associated with coord.
+    //
+    // Compared to, say, Blitz++ we simply need to store BOTH an inner stride and an outer
+    // stride per dimension. The cost of evaluating the indexing information is doubled for an n-dimensional
+    // coordinate. Note, however, for data parallel operations the "inner" indexing cost is not paid and all
+    // lanes are operated upon simultaneously.
   
-  virtual int oIndex(Coordinate &coor)
-  {
-    int idx=0;
-    // Works with either global or local coordinates
-    for(int d=0;d<_ndimension;d++) idx+=_ostride[d]*(coor[d]%_rdimensions[d]);
-    return idx;
-  }
-  virtual int iIndex(Coordinate &lcoor)
-  {
-    int idx=0;
-    for(int d=0;d<_ndimension;d++) idx+=_istride[d]*(lcoor[d]/_rdimensions[d]);
-    return idx;
-  }
-  inline int oIndexReduced(Coordinate &ocoor)
-  {
-    int idx=0; 
-    // ocoor is already reduced so can eliminate the modulo operation
-    // for fast indexing and inline the routine
-    for(int d=0;d<_ndimension;d++) idx+=_ostride[d]*ocoor[d];
-    return idx;
-  }
-  inline void oCoorFromOindex (Coordinate& coor,int Oindex){
-    Lexicographic::CoorFromIndex(coor,Oindex,_rdimensions);
-  }
+    virtual int oIndex(std::vector<int> &coor)
+    {
+        int idx=0;
+        // Works with either global or local coordinates
+        for(int d=0;d<_ndimension;d++) idx+=_ostride[d]*(coor[d]%_rdimensions[d]);
+        return idx;
+    }
+    virtual int iIndex(std::vector<int> &lcoor)
+    {
+        int idx=0;
+        for(int d=0;d<_ndimension;d++) idx+=_istride[d]*(lcoor[d]/_rdimensions[d]);
+        return idx;
+    }
+    inline int oIndexReduced(std::vector<int> &ocoor)
+    {
+      int idx=0; 
+      // ocoor is already reduced so can eliminate the modulo operation
+      // for fast indexing and inline the routine
+      for(int d=0;d<_ndimension;d++) idx+=_ostride[d]*ocoor[d];
+      return idx;
+    }
+    inline void oCoorFromOindex (std::vector<int>& coor,int Oindex){
+      Lexicographic::CoorFromIndex(coor,Oindex,_rdimensions);
+    }
 
-  inline void InOutCoorToLocalCoor (Coordinate &ocoor, Coordinate &icoor, Coordinate &lcoor) {
-    lcoor.resize(_ndimension);
-    for (int d = 0; d < _ndimension; d++)
-      lcoor[d] = ocoor[d] + _rdimensions[d] * icoor[d];
-  }
+    inline void InOutCoorToLocalCoor (std::vector<int> &ocoor, std::vector<int> &icoor, std::vector<int> &lcoor) {
+      lcoor.resize(_ndimension);
+      for (int d = 0; d < _ndimension; d++)
+        lcoor[d] = ocoor[d] + _rdimensions[d] * icoor[d];
+    }
 
-  //////////////////////////////////////////////////////////
-  // SIMD lane addressing
-  //////////////////////////////////////////////////////////
-  inline void iCoorFromIindex(Coordinate &coor,int lane)
-  {
-    Lexicographic::CoorFromIndex(coor,lane,_simd_layout);
-  }
+    //////////////////////////////////////////////////////////
+    // SIMD lane addressing
+    //////////////////////////////////////////////////////////
+    inline void iCoorFromIindex(std::vector<int> &coor,int lane)
+    {
+      Lexicographic::CoorFromIndex(coor,lane,_simd_layout);
+    }
 
-  inline int PermuteDim(int dimension){
-    return _simd_layout[dimension]>1;
-  }
-  inline int PermuteType(int dimension){
-    int permute_type=0;
-    //
-    // Best way to encode this would be to present a mask 
-    // for which simd dimensions are rotated, and the rotation
-    // size. If there is only one simd dimension rotated, this is just 
-    // a permute. 
-    //
-    // Cases: PermuteType == 1,2,4,8
-    // Distance should be either 0,1,2..
-    //
-    if ( _simd_layout[dimension] > 2 ) { 
-      for(int d=0;d<_ndimension;d++){
-	if ( d != dimension ) assert ( (_simd_layout[d]==1)  );
+    inline int PermuteDim(int dimension){
+      return _simd_layout[dimension]>1;
+    }
+    inline int PermuteType(int dimension){
+      int permute_type=0;
+      //
+      // FIXME:
+      //
+      // Best way to encode this would be to present a mask 
+      // for which simd dimensions are rotated, and the rotation
+      // size. If there is only one simd dimension rotated, this is just 
+      // a permute. 
+      //
+      // Cases: PermuteType == 1,2,4,8
+      // Distance should be either 0,1,2..
+      //
+      if ( _simd_layout[dimension] > 2 ) { 
+        for(int d=0;d<_ndimension;d++){
+          if ( d != dimension ) assert ( (_simd_layout[d]==1)  );
+        }
+        permute_type = RotateBit; // How to specify distance; this is not just direction.
+        return permute_type;
+      }
+
+      for(int d=_ndimension-1;d>dimension;d--){
+        if (_simd_layout[d]>1 ) permute_type++;
       }
-      permute_type = RotateBit; // How to specify distance; this is not just direction.
       return permute_type;
     }
+    ////////////////////////////////////////////////////////////////
+    // Array sizing queries
+    ////////////////////////////////////////////////////////////////
 
-    for(int d=_ndimension-1;d>dimension;d--){
-      if (_simd_layout[d]>1 ) permute_type++;
+    inline int iSites(void) const { return _isites; };
+    inline int Nsimd(void)  const { return _isites; };// Synonymous with iSites
+    inline int oSites(void) const { return _osites; };
+    inline int lSites(void) const { return _isites*_osites; }; 
+    inline int gSites(void) const { return _isites*_osites*_Nprocessors; }; 
+    inline int Nd    (void) const { return _ndimension;};
+
+    inline const std::vector<int> LocalStarts(void)             { return _lstart;    };
+    inline const std::vector<int> &FullDimensions(void)         { return _fdimensions;};
+    inline const std::vector<int> &GlobalDimensions(void)       { return _gdimensions;};
+    inline const std::vector<int> &LocalDimensions(void)        { return _ldimensions;};
+    inline const std::vector<int> &VirtualLocalDimensions(void) { return _ldimensions;};
+
+    ////////////////////////////////////////////////////////////////
+    // Utility to print the full decomposition details 
+    ////////////////////////////////////////////////////////////////
+
+    void show_decomposition(){
+      std::cout << GridLogMessage << "\tFull Dimensions    : " << _fdimensions << std::endl;
+      std::cout << GridLogMessage << "\tSIMD layout        : " << _simd_layout << std::endl;
+      std::cout << GridLogMessage << "\tGlobal Dimensions  : " << _gdimensions << std::endl;
+      std::cout << GridLogMessage << "\tLocal Dimensions   : " << _ldimensions << std::endl;
+      std::cout << GridLogMessage << "\tReduced Dimensions : " << _rdimensions << std::endl;
+      std::cout << GridLogMessage << "\tOuter strides      : " << _ostride << std::endl;
+      std::cout << GridLogMessage << "\tInner strides      : " << _istride << std::endl;
+      std::cout << GridLogMessage << "\tiSites             : " << _isites << std::endl;
+      std::cout << GridLogMessage << "\toSites             : " << _osites << std::endl;
+      std::cout << GridLogMessage << "\tlSites             : " << lSites() << std::endl;        
+      std::cout << GridLogMessage << "\tgSites             : " << gSites() << std::endl;
+      std::cout << GridLogMessage << "\tNd                 : " << _ndimension << std::endl;             
+    } 
+
+    ////////////////////////////////////////////////////////////////
+    // Global addressing
+    ////////////////////////////////////////////////////////////////
+    void GlobalIndexToGlobalCoor(int gidx,std::vector<int> &gcoor){
+      assert(gidx< gSites());
+      Lexicographic::CoorFromIndex(gcoor,gidx,_gdimensions);
     }
-    return permute_type;
-  }
-  ////////////////////////////////////////////////////////////////
-  // Array sizing queries
-  ////////////////////////////////////////////////////////////////
-
-  inline int iSites(void) const { return _isites; };
-  inline int Nsimd(void)  const { return _isites; };// Synonymous with iSites
-  inline int oSites(void) const { return _osites; };
-  inline int lSites(void) const { return _isites*_osites; }; 
-  inline int gSites(void) const { return _isites*_osites*_Nprocessors; }; 
-  inline int Nd    (void) const { return _ndimension;};
-
-  inline const Coordinate LocalStarts(void)             { return _lstart;    };
-  inline const Coordinate &FullDimensions(void)         { return _fdimensions;};
-  inline const Coordinate &GlobalDimensions(void)       { return _gdimensions;};
-  inline const Coordinate &LocalDimensions(void)        { return _ldimensions;};
-  inline const Coordinate &VirtualLocalDimensions(void) { return _ldimensions;};
-
-  ////////////////////////////////////////////////////////////////
-  // Utility to print the full decomposition details 
-  ////////////////////////////////////////////////////////////////
-
-  void show_decomposition(){
-    std::cout << GridLogMessage << "\tFull Dimensions    : " << _fdimensions << std::endl;
-    std::cout << GridLogMessage << "\tSIMD layout        : " << _simd_layout << std::endl;
-    std::cout << GridLogMessage << "\tGlobal Dimensions  : " << _gdimensions << std::endl;
-    std::cout << GridLogMessage << "\tLocal Dimensions   : " << _ldimensions << std::endl;
-    std::cout << GridLogMessage << "\tReduced Dimensions : " << _rdimensions << std::endl;
-    std::cout << GridLogMessage << "\tOuter strides      : " << _ostride << std::endl;
-    std::cout << GridLogMessage << "\tInner strides      : " << _istride << std::endl;
-    std::cout << GridLogMessage << "\tiSites             : " << _isites << std::endl;
-    std::cout << GridLogMessage << "\toSites             : " << _osites << std::endl;
-    std::cout << GridLogMessage << "\tlSites             : " << lSites() << std::endl;        
-    std::cout << GridLogMessage << "\tgSites             : " << gSites() << std::endl;
-    std::cout << GridLogMessage << "\tNd                 : " << _ndimension << std::endl;             
-  } 
-
-  ////////////////////////////////////////////////////////////////
-  // Global addressing
-  ////////////////////////////////////////////////////////////////
-  void GlobalIndexToGlobalCoor(int gidx,Coordinate &gcoor){
-    assert(gidx< gSites());
-    Lexicographic::CoorFromIndex(gcoor,gidx,_gdimensions);
-  }
-  void LocalIndexToLocalCoor(int lidx,Coordinate &lcoor){
-    assert(lidx<lSites());
-    Lexicographic::CoorFromIndex(lcoor,lidx,_ldimensions);
-  }
-  void GlobalCoorToGlobalIndex(const Coordinate & gcoor,int & gidx){
-    gidx=0;
-    int mult=1;
-    for(int mu=0;mu<_ndimension;mu++) {
-      gidx+=mult*gcoor[mu];
-      mult*=_gdimensions[mu];
+    void LocalIndexToLocalCoor(int lidx,std::vector<int> &lcoor){
+      assert(lidx<lSites());
+      Lexicographic::CoorFromIndex(lcoor,lidx,_ldimensions);
     }
-  }
-  void GlobalCoorToProcessorCoorLocalCoor(Coordinate &pcoor,Coordinate &lcoor,const Coordinate &gcoor)
-  {
-    pcoor.resize(_ndimension);
-    lcoor.resize(_ndimension);
-    for(int mu=0;mu<_ndimension;mu++){
-      int _fld  = _fdimensions[mu]/_processors[mu];
-      pcoor[mu] = gcoor[mu]/_fld;
-      lcoor[mu] = gcoor[mu]%_fld;
+    void GlobalCoorToGlobalIndex(const std::vector<int> & gcoor,int & gidx){
+      gidx=0;
+      int mult=1;
+      for(int mu=0;mu<_ndimension;mu++) {
+        gidx+=mult*gcoor[mu];
+        mult*=_gdimensions[mu];
+      }
     }
-  }
-  void GlobalCoorToRankIndex(int &rank, int &o_idx, int &i_idx ,const Coordinate &gcoor)
-  {
-    Coordinate pcoor;
-    Coordinate lcoor;
-    GlobalCoorToProcessorCoorLocalCoor(pcoor,lcoor,gcoor);
-    rank = RankFromProcessorCoor(pcoor);
-    /*
-      Coordinate cblcoor(lcoor);
+    void GlobalCoorToProcessorCoorLocalCoor(std::vector<int> &pcoor,std::vector<int> &lcoor,const std::vector<int> &gcoor)
+    {
+      pcoor.resize(_ndimension);
+      lcoor.resize(_ndimension);
+      for(int mu=0;mu<_ndimension;mu++){
+        int _fld  = _fdimensions[mu]/_processors[mu];
+        pcoor[mu] = gcoor[mu]/_fld;
+        lcoor[mu] = gcoor[mu]%_fld;
+      }
+    }
+    void GlobalCoorToRankIndex(int &rank, int &o_idx, int &i_idx ,const std::vector<int> &gcoor)
+    {
+      std::vector<int> pcoor;
+      std::vector<int> lcoor;
+      GlobalCoorToProcessorCoorLocalCoor(pcoor,lcoor,gcoor);
+      rank = RankFromProcessorCoor(pcoor);
+      /*
+      std::vector<int> cblcoor(lcoor);
       for(int d=0;d<cblcoor.size();d++){
-      if( this->CheckerBoarded(d) ) {
-      cblcoor[d] = lcoor[d]/2;
+        if( this->CheckerBoarded(d) ) {
+          cblcoor[d] = lcoor[d]/2;
+        }
       }
-      }
-    */
-    i_idx= iIndex(lcoor);
-    o_idx= oIndex(lcoor);
-  }
-
-  void RankIndexToGlobalCoor(int rank, int o_idx, int i_idx , Coordinate &gcoor)
-  {
-    gcoor.resize(_ndimension);
-    Coordinate coor(_ndimension);
-
-    ProcessorCoorFromRank(rank,coor);
-    for(int mu=0;mu<_ndimension;mu++) gcoor[mu] = _ldimensions[mu]*coor[mu];
-
-    iCoorFromIindex(coor,i_idx);
-    for(int mu=0;mu<_ndimension;mu++) gcoor[mu] += _rdimensions[mu]*coor[mu];
-
-    oCoorFromOindex (coor,o_idx);
-    for(int mu=0;mu<_ndimension;mu++) gcoor[mu] += coor[mu];
-      
-  }
-  void RankIndexCbToFullGlobalCoor(int rank, int o_idx, int i_idx, int cb,Coordinate &fcoor)
-  {
-    RankIndexToGlobalCoor(rank,o_idx,i_idx ,fcoor);
-    if(CheckerBoarded(0)){
-      fcoor[0] = fcoor[0]*2+cb;
+      */
+      i_idx= iIndex(lcoor);
+      o_idx= oIndex(lcoor);
+    }
+
+    void RankIndexToGlobalCoor(int rank, int o_idx, int i_idx , std::vector<int> &gcoor)
+    {
+      gcoor.resize(_ndimension);
+      std::vector<int> coor(_ndimension);
+
+      ProcessorCoorFromRank(rank,coor);
+      for(int mu=0;mu<_ndimension;mu++) gcoor[mu] = _ldimensions[mu]*coor[mu];
+
+      iCoorFromIindex(coor,i_idx);
+      for(int mu=0;mu<_ndimension;mu++) gcoor[mu] += _rdimensions[mu]*coor[mu];
+
+      oCoorFromOindex (coor,o_idx);
+      for(int mu=0;mu<_ndimension;mu++) gcoor[mu] += coor[mu];
+      
+    }
+    void RankIndexCbToFullGlobalCoor(int rank, int o_idx, int i_idx, int cb,std::vector<int> &fcoor)
+    {
+      RankIndexToGlobalCoor(rank,o_idx,i_idx ,fcoor);
+      if(CheckerBoarded(0)){
+        fcoor[0] = fcoor[0]*2+cb;
+      }
+    }
+    void ProcessorCoorLocalCoorToGlobalCoor(std::vector<int> &Pcoor,std::vector<int> &Lcoor,std::vector<int> &gcoor)
+    {
+      gcoor.resize(_ndimension);
+      for(int mu=0;mu<_ndimension;mu++) gcoor[mu] = Pcoor[mu]*_ldimensions[mu]+Lcoor[mu];
     }
-  }
-  void ProcessorCoorLocalCoorToGlobalCoor(Coordinate &Pcoor,Coordinate &Lcoor,Coordinate &gcoor)
-  {
-    gcoor.resize(_ndimension);
-    for(int mu=0;mu<_ndimension;mu++) gcoor[mu] = Pcoor[mu]*_ldimensions[mu]+Lcoor[mu];
-  }
 };
 
-NAMESPACE_END(Grid);
+
+}
 #endif

Grid/cartesian/Cartesian_full.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,96 +23,97 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_CARTESIAN_FULL_H
 #define GRID_CARTESIAN_FULL_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid{
     
 /////////////////////////////////////////////////////////////////////////////////////////
 // Grid Support.
 /////////////////////////////////////////////////////////////////////////////////////////
 
+
 class GridCartesian: public GridBase {
 
 public:
-  int dummy;
-  virtual int  CheckerBoardFromOindexTable (int Oindex) {
-    return 0;
-  }
-  virtual int  CheckerBoardFromOindex (int Oindex)
-  {
-    return 0;
-  }
-  virtual int CheckerBoarded(int dim){
-    return 0;
-  }
-  virtual int CheckerBoard(const Coordinate &site){
-    return 0;
-  }
-  virtual int CheckerBoardDestination(int cb,int shift,int dim){
-    return 0;
-  }
-  virtual int CheckerBoardShiftForCB(int source_cb,int dim,int shift, int ocb){
-    return shift;
-  }
-  virtual int CheckerBoardShift(int source_cb,int dim,int shift, int osite){
-    return shift;
-  }
-  /////////////////////////////////////////////////////////////////////////
-  // Constructor takes a parent grid and possibly subdivides communicator.
-  /////////////////////////////////////////////////////////////////////////
-  GridCartesian(const Coordinate &dimensions,
-		const Coordinate &simd_layout,
-		const Coordinate &processor_grid,
-		const GridCartesian &parent) : GridBase(processor_grid,parent,dummy)
-  {
-    Init(dimensions,simd_layout,processor_grid);
-  }
-  GridCartesian(const Coordinate &dimensions,
-		const Coordinate &simd_layout,
-		const Coordinate &processor_grid,
-		const GridCartesian &parent,int &split_rank) : GridBase(processor_grid,parent,split_rank)
-  {
-    Init(dimensions,simd_layout,processor_grid);
-  }
-  /////////////////////////////////////////////////////////////////////////
-  // Construct from comm world
-  /////////////////////////////////////////////////////////////////////////
-  GridCartesian(const Coordinate &dimensions,
-		const Coordinate &simd_layout,
-		const Coordinate &processor_grid) : GridBase(processor_grid)
-  {
-    Init(dimensions,simd_layout,processor_grid);
-  }
+    int dummy;
+    virtual int  CheckerBoardFromOindexTable (int Oindex) {
+      return 0;
+    }
+    virtual int  CheckerBoardFromOindex (int Oindex)
+    {
+      return 0;
+    }
+    virtual int CheckerBoarded(int dim){
+      return 0;
+    }
+    virtual int CheckerBoard(const std::vector<int> &site){
+        return 0;
+    }
+    virtual int CheckerBoardDestination(int cb,int shift,int dim){
+        return 0;
+    }
+    virtual int CheckerBoardShiftForCB(int source_cb,int dim,int shift, int ocb){
+      return shift;
+    }
+    virtual int CheckerBoardShift(int source_cb,int dim,int shift, int osite){
+      return shift;
+    }
+    /////////////////////////////////////////////////////////////////////////
+    // Constructor takes a parent grid and possibly subdivides communicator.
+    /////////////////////////////////////////////////////////////////////////
+    GridCartesian(const std::vector<int> &dimensions,
+		  const std::vector<int> &simd_layout,
+		  const std::vector<int> &processor_grid,
+		  const GridCartesian &parent) : GridBase(processor_grid,parent,dummy)
+    {
+      Init(dimensions,simd_layout,processor_grid);
+    }
+    GridCartesian(const std::vector<int> &dimensions,
+		  const std::vector<int> &simd_layout,
+		  const std::vector<int> &processor_grid,
+		  const GridCartesian &parent,int &split_rank) : GridBase(processor_grid,parent,split_rank)
+    {
+      Init(dimensions,simd_layout,processor_grid);
+    }
+    /////////////////////////////////////////////////////////////////////////
+    // Construct from comm world
+    /////////////////////////////////////////////////////////////////////////
+    GridCartesian(const std::vector<int> &dimensions,
+		  const std::vector<int> &simd_layout,
+		  const std::vector<int> &processor_grid) : GridBase(processor_grid)
+    {
+      Init(dimensions,simd_layout,processor_grid);
+    }
 
-  virtual ~GridCartesian() = default;
+    virtual ~GridCartesian() = default;
 
-  void Init(const Coordinate &dimensions,
-	    const Coordinate &simd_layout,
-	    const Coordinate &processor_grid)
-  {
-    ///////////////////////
-    // Grid information
-    ///////////////////////
+    void Init(const std::vector<int> &dimensions,
+	      const std::vector<int> &simd_layout,
+	      const std::vector<int> &processor_grid)
+    {
+      ///////////////////////
+      // Grid information
+      ///////////////////////
       _isCheckerBoarded = false;
-    _ndimension = dimensions.size();
+      _ndimension = dimensions.size();
 
-    _fdimensions.resize(_ndimension);
-    _gdimensions.resize(_ndimension);
-    _ldimensions.resize(_ndimension);
-    _rdimensions.resize(_ndimension);
-    _simd_layout.resize(_ndimension);
-    _lstart.resize(_ndimension);
-    _lend.resize(_ndimension);
+      _fdimensions.resize(_ndimension);
+      _gdimensions.resize(_ndimension);
+      _ldimensions.resize(_ndimension);
+      _rdimensions.resize(_ndimension);
+      _simd_layout.resize(_ndimension);
+      _lstart.resize(_ndimension);
+      _lend.resize(_ndimension);
 
-    _ostride.resize(_ndimension);
-    _istride.resize(_ndimension);
+      _ostride.resize(_ndimension);
+      _istride.resize(_ndimension);
 
-    _fsites = _gsites = _osites = _isites = 1;
+      _fsites = _gsites = _osites = _isites = 1;
 
-    for (int d = 0; d < _ndimension; d++)
+      for (int d = 0; d < _ndimension; d++)
       {
         _fdimensions[d] = dimensions[d];   // Global dimensions
         _gdimensions[d] = _fdimensions[d]; // Global dimensions
@@ -135,30 +136,30 @@ public:
 
         // Addressing support
         if (d == 0)
-	  {
-	    _ostride[d] = 1;
-	    _istride[d] = 1;
-	  }
+        {
+          _ostride[d] = 1;
+          _istride[d] = 1;
+        }
         else
-	  {
-	    _ostride[d] = _ostride[d - 1] * _rdimensions[d - 1];
-	    _istride[d] = _istride[d - 1] * _simd_layout[d - 1];
-	  }
+        {
+          _ostride[d] = _ostride[d - 1] * _rdimensions[d - 1];
+          _istride[d] = _istride[d - 1] * _simd_layout[d - 1];
+        }
       }
 
-    ///////////////////////
-    // subplane information
-    ///////////////////////
-    _slice_block.resize(_ndimension);
-    _slice_stride.resize(_ndimension);
-    _slice_nblock.resize(_ndimension);
+      ///////////////////////
+      // subplane information
+      ///////////////////////
+      _slice_block.resize(_ndimension);
+      _slice_stride.resize(_ndimension);
+      _slice_nblock.resize(_ndimension);
 
-    int block = 1;
-    int nblock = 1;
-    for (int d = 0; d < _ndimension; d++)
-      nblock *= _rdimensions[d];
+      int block = 1;
+      int nblock = 1;
+      for (int d = 0; d < _ndimension; d++)
+        nblock *= _rdimensions[d];
 
-    for (int d = 0; d < _ndimension; d++)
+      for (int d = 0; d < _ndimension; d++)
       {
         nblock /= _rdimensions[d];
         _slice_block[d] = block;
@@ -166,9 +167,8 @@ public:
         _slice_nblock[d] = nblock;
         block = block * _rdimensions[d];
       }
-  };
+    };
 
 };
-
-NAMESPACE_END(Grid);
+}
 #endif

Grid/cartesian/Cartesian_red_black.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,147 +24,178 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_CARTESIAN_RED_BLACK_H
 #define GRID_CARTESIAN_RED_BLACK_H
 
-NAMESPACE_BEGIN(Grid);
 
-static const int CbRed  =0;
-static const int CbBlack=1;
-static const int Even   =CbRed;
-static const int Odd    =CbBlack;
+namespace Grid {
+
+  static const int CbRed  =0;
+  static const int CbBlack=1;
+  static const int Even   =CbRed;
+  static const int Odd    =CbBlack;
     
 // Specialise this for red black grids storing half the data like a chess board.
 class GridRedBlackCartesian : public GridBase
 {
 public:
-  Coordinate _checker_dim_mask;
-  int              _checker_dim;
-  std::vector<int> _checker_board;
+    std::vector<int> _checker_dim_mask;
+    int              _checker_dim;
+    std::vector<int> _checker_board;
 
-  virtual int CheckerBoarded(int dim){
-    if( dim==_checker_dim) return 1;
-    else return 0;
-  }
-  virtual int CheckerBoard(const Coordinate &site){
-    int linear=0;
-    assert(site.size()==_ndimension);
-    for(int d=0;d<_ndimension;d++){ 
-      if(_checker_dim_mask[d])
-	linear=linear+site[d];
+    virtual int CheckerBoarded(int dim){
+      if( dim==_checker_dim) return 1;
+      else return 0;
+    }
+    virtual int CheckerBoard(const std::vector<int> &site){
+      int linear=0;
+      assert(site.size()==_ndimension);
+      for(int d=0;d<_ndimension;d++){ 
+	if(_checker_dim_mask[d])
+	  linear=linear+site[d];
+      }
+      return (linear&0x1);
     }
-    return (linear&0x1);
-  }
 
-  // Depending on the cb of site, we toggle source cb.
-  // for block #b, element #e = (b, e)
-  // we need 
-  virtual int CheckerBoardShiftForCB(int source_cb,int dim,int shift,int ocb){
-    if(dim != _checker_dim) return shift;
 
-    int fulldim =_fdimensions[dim];
-    shift = (shift+fulldim)%fulldim;
+    // Depending on the cb of site, we toggle source cb.
+    // for block #b, element #e = (b, e)
+    // we need 
+    virtual int CheckerBoardShiftForCB(int source_cb,int dim,int shift,int ocb){
+      if(dim != _checker_dim) return shift;
 
-    // Probably faster with table lookup;
-    // or by looping over x,y,z and multiply rather than computing checkerboard.
+      int fulldim =_fdimensions[dim];
+      shift = (shift+fulldim)%fulldim;
+
+      // Probably faster with table lookup;
+      // or by looping over x,y,z and multiply rather than computing checkerboard.
 	  
-    if ( (source_cb+ocb)&1 ) {
-      return (shift)/2;
-    } else {
-      return (shift+1)/2;
+      if ( (source_cb+ocb)&1 ) {
+	return (shift)/2;
+      } else {
+	return (shift+1)/2;
+      }
     }
-  }
-  virtual int  CheckerBoardFromOindexTable (int Oindex) {
-    return _checker_board[Oindex];
-  }
-  virtual int  CheckerBoardFromOindex (int Oindex)
-  {
-    Coordinate ocoor;
-    oCoorFromOindex(ocoor,Oindex);
-    return CheckerBoard(ocoor);
-  }
-  virtual int CheckerBoardShift(int source_cb,int dim,int shift,int osite){
+    virtual int  CheckerBoardFromOindexTable (int Oindex) {
+      return _checker_board[Oindex];
+    }
+    virtual int  CheckerBoardFromOindex (int Oindex)
+    {
+      std::vector<int> ocoor;
+      oCoorFromOindex(ocoor,Oindex);
+      return CheckerBoard(ocoor);
+    }
+    virtual int CheckerBoardShift(int source_cb,int dim,int shift,int osite){
 
-    if(dim != _checker_dim) return shift;
+      if(dim != _checker_dim) return shift;
 
-    int ocb=CheckerBoardFromOindex(osite);
+      int ocb=CheckerBoardFromOindex(osite);
       
-    return CheckerBoardShiftForCB(source_cb,dim,shift,ocb);
-  }
+      return CheckerBoardShiftForCB(source_cb,dim,shift,ocb);
+    }
     
-  virtual int CheckerBoardDestination(int source_cb,int shift,int dim){
-    if ( _checker_dim_mask[dim]  ) {
-      // If _fdimensions[checker_dim] is odd, then shifting by 1 in other dims
-      // does NOT cause a parity hop.
-      int add=(dim==_checker_dim) ? 0 : _fdimensions[_checker_dim];
-      if ( (shift+add) &0x1) {
-	return 1-source_cb;
+    virtual int CheckerBoardDestination(int source_cb,int shift,int dim){
+      if ( _checker_dim_mask[dim]  ) {
+	// If _fdimensions[checker_dim] is odd, then shifting by 1 in other dims
+	// does NOT cause a parity hop.
+	int add=(dim==_checker_dim) ? 0 : _fdimensions[_checker_dim];
+        if ( (shift+add) &0x1) {
+            return 1-source_cb;
+        } else {
+            return source_cb;
+        }
       } else {
 	return source_cb;
+
       }
-    } else {
-      return source_cb;
+    };
 
+    ////////////////////////////////////////////////////////////
+    // Create Redblack from original grid; require full grid pointer ?
+    ////////////////////////////////////////////////////////////
+    GridRedBlackCartesian(const GridBase *base) : GridBase(base->_processors,*base)
+    {
+      int dims = base->_ndimension;
+      std::vector<int> checker_dim_mask(dims,1);
+      int checker_dim = 0;
+      Init(base->_fdimensions,base->_simd_layout,base->_processors,checker_dim_mask,checker_dim);
+    };
+
+    ////////////////////////////////////////////////////////////
+    // Create redblack from original grid, with non-trivial checker dim mask
+    ////////////////////////////////////////////////////////////
+    GridRedBlackCartesian(const GridBase *base,
+			  const std::vector<int> &checker_dim_mask,
+			  int checker_dim
+			  ) :  GridBase(base->_processors,*base) 
+    {
+      Init(base->_fdimensions,base->_simd_layout,base->_processors,checker_dim_mask,checker_dim)  ;
     }
-  };
 
-  ////////////////////////////////////////////////////////////
-  // Create Redblack from original grid; require full grid pointer ?
-  ////////////////////////////////////////////////////////////
-  GridRedBlackCartesian(const GridBase *base) : GridBase(base->_processors,*base)
-  {
-    int dims = base->_ndimension;
-    Coordinate checker_dim_mask(dims,1);
-    int checker_dim = 0;
-    Init(base->_fdimensions,base->_simd_layout,base->_processors,checker_dim_mask,checker_dim);
-  };
+    virtual ~GridRedBlackCartesian() = default;
+#if 0
+    ////////////////////////////////////////////////////////////
+    // Create redblack grid ;; deprecate these. Should not
+    // need direct creation of redblack without a full grid to base on
+    ////////////////////////////////////////////////////////////
+    GridRedBlackCartesian(const GridBase *base,
+			  const std::vector<int> &dimensions,
+			  const std::vector<int> &simd_layout,
+			  const std::vector<int> &processor_grid,
+			  const std::vector<int> &checker_dim_mask,
+			  int checker_dim
+			  ) :  GridBase(processor_grid,*base) 
+    {
+      Init(dimensions,simd_layout,processor_grid,checker_dim_mask,checker_dim);
+    }
 
-  ////////////////////////////////////////////////////////////
-  // Create redblack from original grid, with non-trivial checker dim mask
-  ////////////////////////////////////////////////////////////
-  GridRedBlackCartesian(const GridBase *base,
-			const Coordinate &checker_dim_mask,
-			int checker_dim
-			) :  GridBase(base->_processors,*base) 
-  {
-    Init(base->_fdimensions,base->_simd_layout,base->_processors,checker_dim_mask,checker_dim)  ;
-  }
+    ////////////////////////////////////////////////////////////
+    // Create redblack grid
+    ////////////////////////////////////////////////////////////
+    GridRedBlackCartesian(const GridBase *base,
+			  const std::vector<int> &dimensions,
+			  const std::vector<int> &simd_layout,
+			  const std::vector<int> &processor_grid) : GridBase(processor_grid,*base) 
+    {
+      std::vector<int> checker_dim_mask(dimensions.size(),1);
+      int checker_dim = 0;
+      Init(dimensions,simd_layout,processor_grid,checker_dim_mask,checker_dim);
+    }
+#endif
 
-  virtual ~GridRedBlackCartesian() = default;
-
-  void Init(const Coordinate &dimensions,
-	    const Coordinate &simd_layout,
-	    const Coordinate &processor_grid,
-	    const Coordinate &checker_dim_mask,
-	    int checker_dim)
-  {
+    void Init(const std::vector<int> &dimensions,
+              const std::vector<int> &simd_layout,
+              const std::vector<int> &processor_grid,
+              const std::vector<int> &checker_dim_mask,
+              int checker_dim)
+    {
 
       _isCheckerBoarded = true;
-    _checker_dim = checker_dim;
-    assert(checker_dim_mask[checker_dim] == 1);
-    _ndimension = dimensions.size();
-    assert(checker_dim_mask.size() == _ndimension);
-    assert(processor_grid.size() == _ndimension);
-    assert(simd_layout.size() == _ndimension);
+      _checker_dim = checker_dim;
+      assert(checker_dim_mask[checker_dim] == 1);
+      _ndimension = dimensions.size();
+      assert(checker_dim_mask.size() == _ndimension);
+      assert(processor_grid.size() == _ndimension);
+      assert(simd_layout.size() == _ndimension);
 
-    _fdimensions.resize(_ndimension);
-    _gdimensions.resize(_ndimension);
-    _ldimensions.resize(_ndimension);
-    _rdimensions.resize(_ndimension);
-    _simd_layout.resize(_ndimension);
-    _lstart.resize(_ndimension);
-    _lend.resize(_ndimension);
+      _fdimensions.resize(_ndimension);
+      _gdimensions.resize(_ndimension);
+      _ldimensions.resize(_ndimension);
+      _rdimensions.resize(_ndimension);
+      _simd_layout.resize(_ndimension);
+      _lstart.resize(_ndimension);
+      _lend.resize(_ndimension);
 
-    _ostride.resize(_ndimension);
-    _istride.resize(_ndimension);
+      _ostride.resize(_ndimension);
+      _istride.resize(_ndimension);
 
-    _fsites = _gsites = _osites = _isites = 1;
+      _fsites = _gsites = _osites = _isites = 1;
 
-    _checker_dim_mask = checker_dim_mask;
+      _checker_dim_mask = checker_dim_mask;
 
-    for (int d = 0; d < _ndimension; d++)
+      for (int d = 0; d < _ndimension; d++)
       {
         _fdimensions[d] = dimensions[d];
         _gdimensions[d] = _fdimensions[d];
@@ -172,11 +203,11 @@ public:
         _gsites = _gsites * _gdimensions[d];
 
         if (d == _checker_dim)
-	  {
-	    assert((_gdimensions[d] & 0x1) == 0);
-	    _gdimensions[d] = _gdimensions[d] / 2; // Remove a checkerboard
-	    _gsites /= 2;
-	  }
+        {
+          assert((_gdimensions[d] & 0x1) == 0);
+          _gdimensions[d] = _gdimensions[d] / 2; // Remove a checkerboard
+	  _gsites /= 2;
+        }
         _ldimensions[d] = _gdimensions[d] / _processors[d];
         assert(_ldimensions[d] * _processors[d] == _gdimensions[d]);
         _lstart[d] = _processor_coor[d] * _ldimensions[d];
@@ -191,42 +222,42 @@ public:
         // all elements of a simd vector must have same checkerboard.
         // If Ls vectorised, this must still be the case; e.g. dwf rb5d
         if (_simd_layout[d] > 1)
-	  {
-	    if (checker_dim_mask[d])
-	      {
-		assert((_rdimensions[d] & 0x1) == 0);
-	      }
-	  }
+        {
+          if (checker_dim_mask[d])
+          {
+            assert((_rdimensions[d] & 0x1) == 0);
+          }
+        }
 
         _osites *= _rdimensions[d];
         _isites *= _simd_layout[d];
 
         // Addressing support
         if (d == 0)
-	  {
-	    _ostride[d] = 1;
-	    _istride[d] = 1;
-	  }
+        {
+          _ostride[d] = 1;
+          _istride[d] = 1;
+        }
         else
-	  {
-	    _ostride[d] = _ostride[d - 1] * _rdimensions[d - 1];
-	    _istride[d] = _istride[d - 1] * _simd_layout[d - 1];
-	  }
+        {
+          _ostride[d] = _ostride[d - 1] * _rdimensions[d - 1];
+          _istride[d] = _istride[d - 1] * _simd_layout[d - 1];
+        }
       }
 
-    ////////////////////////////////////////////////////////////////////////////////////////////
-    // subplane information
-    ////////////////////////////////////////////////////////////////////////////////////////////
-    _slice_block.resize(_ndimension);
-    _slice_stride.resize(_ndimension);
-    _slice_nblock.resize(_ndimension);
+      ////////////////////////////////////////////////////////////////////////////////////////////
+      // subplane information
+      ////////////////////////////////////////////////////////////////////////////////////////////
+      _slice_block.resize(_ndimension);
+      _slice_stride.resize(_ndimension);
+      _slice_nblock.resize(_ndimension);
 
-    int block = 1;
-    int nblock = 1;
-    for (int d = 0; d < _ndimension; d++)
-      nblock *= _rdimensions[d];
+      int block = 1;
+      int nblock = 1;
+      for (int d = 0; d < _ndimension; d++)
+        nblock *= _rdimensions[d];
 
-    for (int d = 0; d < _ndimension; d++)
+      for (int d = 0; d < _ndimension; d++)
       {
         nblock /= _rdimensions[d];
         _slice_block[d] = block;
@@ -235,55 +266,55 @@ public:
         block = block * _rdimensions[d];
       }
 
-    ////////////////////////////////////////////////
-    // Create a checkerboard lookup table
-    ////////////////////////////////////////////////
-    int rvol = 1;
-    for (int d = 0; d < _ndimension; d++)
+      ////////////////////////////////////////////////
+      // Create a checkerboard lookup table
+      ////////////////////////////////////////////////
+      int rvol = 1;
+      for (int d = 0; d < _ndimension; d++)
       {
         rvol = rvol * _rdimensions[d];
       }
-    _checker_board.resize(rvol);
-    for (int osite = 0; osite < _osites; osite++)
+      _checker_board.resize(rvol);
+      for (int osite = 0; osite < _osites; osite++)
       {
         _checker_board[osite] = CheckerBoardFromOindex(osite);
       }
-  };
+    };
 
-protected:
-  virtual int oIndex(Coordinate &coor)
-  {
-    int idx = 0;
-    for (int d = 0; d < _ndimension; d++)
+  protected:
+    virtual int oIndex(std::vector<int> &coor)
+    {
+      int idx = 0;
+      for (int d = 0; d < _ndimension; d++)
       {
         if (d == _checker_dim)
-	  {
-	    idx += _ostride[d] * ((coor[d] / 2) % _rdimensions[d]);
-	  }
+        {
+          idx += _ostride[d] * ((coor[d] / 2) % _rdimensions[d]);
+        }
         else
-	  {
-	    idx += _ostride[d] * (coor[d] % _rdimensions[d]);
-	  }
+        {
+          idx += _ostride[d] * (coor[d] % _rdimensions[d]);
+        }
       }
-    return idx;
-  };
+      return idx;
+    };
 
-  virtual int iIndex(Coordinate &lcoor)
-  {
-    int idx = 0;
-    for (int d = 0; d < _ndimension; d++)
+    virtual int iIndex(std::vector<int> &lcoor)
+    {
+      int idx = 0;
+      for (int d = 0; d < _ndimension; d++)
       {
         if (d == _checker_dim)
-	  {
-	    idx += _istride[d] * (lcoor[d] / (2 * _rdimensions[d]));
-	  }
+        {
+          idx += _istride[d] * (lcoor[d] / (2 * _rdimensions[d]));
+        }
         else
-	  {
-	    idx += _istride[d] * (lcoor[d] / _rdimensions[d]);
-	  }
+        {
+          idx += _istride[d] * (lcoor[d] / _rdimensions[d]);
+        }
       }
-    return idx;
-  }
+      return idx;
+    }
 };
-NAMESPACE_END(Grid);
+}
 #endif

Grid/communicator/Communicator.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,12 +23,11 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_COMMUNICATOR_H
 #define GRID_COMMUNICATOR_H
 
-#include <Grid/util/Coordinate.h>
 #include <Grid/communicator/SharedMemory.h>
 #include <Grid/communicator/Communicator_base.h>
 

Grid/communicator/Communicator_base.cc

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,15 +23,15 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #include <Grid/GridCore.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <limits.h>
 #include <sys/mman.h>
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 ///////////////////////////////////////////////////////////////
 // Info that is setup once and indept of cartesian layout
@@ -47,8 +47,8 @@ int                      CartesianCommunicator::Dimensions(void)        { return
 int                      CartesianCommunicator::IsBoss(void)            { return _processor==0; };
 int                      CartesianCommunicator::BossRank(void)          { return 0; };
 int                      CartesianCommunicator::ThisRank(void)          { return _processor; };
-const Coordinate & CartesianCommunicator::ThisProcessorCoor(void) { return _processor_coor; };
-const Coordinate & CartesianCommunicator::ProcessorGrid(void)     { return _processors; };
+const std::vector<int> & CartesianCommunicator::ThisProcessorCoor(void) { return _processor_coor; };
+const std::vector<int> & CartesianCommunicator::ProcessorGrid(void)     { return _processors; };
 int                      CartesianCommunicator::ProcessorCount(void)    { return _Nprocessors; };
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -72,6 +72,5 @@ void CartesianCommunicator::GlobalSumVector(ComplexD *c,int N)
   GlobalSumVector((double *)c,2*N);
 }
   
-NAMESPACE_END(Grid);
-
+}
 

Grid/communicator/Communicator_base.h

@@ -1,5 +1,5 @@
 
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,8 +24,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_COMMUNICATOR_BASE_H
 #define GRID_COMMUNICATOR_BASE_H
 
@@ -34,7 +34,7 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 ///////////////////////////////////
 #include <Grid/communicator/SharedMemory.h>
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 class CartesianCommunicator : public SharedMemory {
 
@@ -52,9 +52,9 @@ public:
   // Communicator should know nothing of the physics grid, only processor grid.
   ////////////////////////////////////////////
   int              _Nprocessors;     // How many in all
-  Coordinate _processors;      // Which dimensions get relayed out over processors lanes.
+  std::vector<int> _processors;      // Which dimensions get relayed out over processors lanes.
   int              _processor;       // linear processor rank
-  Coordinate _processor_coor;  // linear processor coordinate
+  std::vector<int> _processor_coor;  // linear processor coordinate
   unsigned long    _ndimension;
   static Grid_MPI_Comm      communicator_world;
   Grid_MPI_Comm             communicator;
@@ -69,34 +69,34 @@ public:
   // Constructors to sub-divide a parent communicator
   // and default to comm world
   ////////////////////////////////////////////////
-  CartesianCommunicator(const Coordinate &processors,const CartesianCommunicator &parent,int &srank);
-  CartesianCommunicator(const Coordinate &pdimensions_in);
+  CartesianCommunicator(const std::vector<int> &processors,const CartesianCommunicator &parent,int &srank);
+  CartesianCommunicator(const std::vector<int> &pdimensions_in);
   virtual ~CartesianCommunicator();
 
-private:
+ private:
 
   ////////////////////////////////////////////////
   // Private initialise from an MPI communicator
   // Can use after an MPI_Comm_split, but hidden from user so private
   ////////////////////////////////////////////////
-  void InitFromMPICommunicator(const Coordinate &processors, Grid_MPI_Comm communicator_base);
+  void InitFromMPICommunicator(const std::vector<int> &processors, Grid_MPI_Comm communicator_base);
+
+ public:
 
-public:
-  
   
   ////////////////////////////////////////////////////////////////////////////////////////
   // Wraps MPI_Cart routines, or implements equivalent on other impls
   ////////////////////////////////////////////////////////////////////////////////////////
   void ShiftedRanks(int dim,int shift,int & source, int & dest);
-  int  RankFromProcessorCoor(Coordinate &coor);
-  void ProcessorCoorFromRank(int rank,Coordinate &coor);
+  int  RankFromProcessorCoor(std::vector<int> &coor);
+  void ProcessorCoorFromRank(int rank,std::vector<int> &coor);
   
   int                      Dimensions(void)        ;
   int                      IsBoss(void)            ;
   int                      BossRank(void)          ;
   int                      ThisRank(void)          ;
-  const Coordinate & ThisProcessorCoor(void) ;
-  const Coordinate & ProcessorGrid(void)     ;
+  const std::vector<int> & ThisProcessorCoor(void) ;
+  const std::vector<int> & ProcessorGrid(void)     ;
   int                      ProcessorCount(void)    ;
 
   ////////////////////////////////////////////////////////////////////////////////
@@ -114,7 +114,6 @@ public:
   void GlobalSumVector(RealD *,int N);
   void GlobalSum(uint32_t &);
   void GlobalSum(uint64_t &);
-  void GlobalSumVector(uint64_t*,int N);
   void GlobalSum(ComplexF &c);
   void GlobalSumVector(ComplexF *c,int N);
   void GlobalSum(ComplexD &c);
@@ -198,12 +197,11 @@ public:
   void AllToAll(void  *in,void *out,uint64_t words         ,uint64_t bytes);
   
   template<class obj> void Broadcast(int root,obj &data)
-  {
-    Broadcast(root,(void *)&data,sizeof(data));
-  }
+    {
+      Broadcast(root,(void *)&data,sizeof(data));
+    };
 
 }; 
-
-NAMESPACE_END(Grid);
+}
 
 #endif

Grid/communicator/Communicator_mpi3.cc

@@ -23,12 +23,12 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #include <Grid/GridCore.h>
 #include <Grid/communicator/SharedMemory.h>
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 Grid_MPI_Comm       CartesianCommunicator::communicator_world;
 
@@ -44,26 +44,21 @@ void CartesianCommunicator::Init(int *argc, char ***argv)
   MPI_Initialized(&flag); // needed to coexist with other libs apparently
   if ( !flag ) {
     MPI_Init_thread(argc,argv,MPI_THREAD_MULTIPLE,&provided);
-
     //If only 1 comms thread we require any threading mode other than SINGLE, but for multiple comms threads we need MULTIPLE
-    if( (nCommThreads == 1) && (provided == MPI_THREAD_SINGLE) ) {
+    if( (nCommThreads == 1 && provided == MPI_THREAD_SINGLE) ||
+        (nCommThreads > 1 && provided != MPI_THREAD_MULTIPLE) )
       assert(0);
-    }
-
-    if( (nCommThreads > 1) && (provided != MPI_THREAD_MULTIPLE) ) {
-      assert(0);
-    }
   }
 
+  Grid_quiesce_nodes();
+
   // Never clean up as done once.
   MPI_Comm_dup (MPI_COMM_WORLD,&communicator_world);
 
-  Grid_quiesce_nodes();
   GlobalSharedMemory::Init(communicator_world);
   GlobalSharedMemory::SharedMemoryAllocate(
 		   GlobalSharedMemory::MAX_MPI_SHM_BYTES,
 		   GlobalSharedMemory::Hugepages);
-  Grid_unquiesce_nodes();
 }
 
 ///////////////////////////////////////////////////////////////////////////
@@ -74,14 +69,14 @@ void CartesianCommunicator::ShiftedRanks(int dim,int shift,int &source,int &dest
   int ierr=MPI_Cart_shift(communicator,dim,shift,&source,&dest);
   assert(ierr==0);
 }
-int CartesianCommunicator::RankFromProcessorCoor(Coordinate &coor)
+int CartesianCommunicator::RankFromProcessorCoor(std::vector<int> &coor)
 {
   int rank;
   int ierr=MPI_Cart_rank  (communicator, &coor[0], &rank);
   assert(ierr==0);
   return rank;
 }
-void  CartesianCommunicator::ProcessorCoorFromRank(int rank, Coordinate &coor)
+void  CartesianCommunicator::ProcessorCoorFromRank(int rank, std::vector<int> &coor)
 {
   coor.resize(_ndimension);
   int ierr=MPI_Cart_coords  (communicator, rank, _ndimension,&coor[0]);
@@ -91,7 +86,7 @@ void  CartesianCommunicator::ProcessorCoorFromRank(int rank, Coordinate &coor)
 ////////////////////////////////////////////////////////////////////////////////////////////////////////
 // Initialises from communicator_world
 ////////////////////////////////////////////////////////////////////////////////////////////////////////
-CartesianCommunicator::CartesianCommunicator(const Coordinate &processors) 
+CartesianCommunicator::CartesianCommunicator(const std::vector<int> &processors) 
 {
   MPI_Comm optimal_comm;
   ////////////////////////////////////////////////////
@@ -110,12 +105,13 @@ CartesianCommunicator::CartesianCommunicator(const Coordinate &processors)
 //////////////////////////////////
 // Try to subdivide communicator
 //////////////////////////////////
-CartesianCommunicator::CartesianCommunicator(const Coordinate &processors,const CartesianCommunicator &parent,int &srank)    
+CartesianCommunicator::CartesianCommunicator(const std::vector<int> &processors,const CartesianCommunicator &parent,int &srank)    
 {
-  _ndimension = processors.size();  assert(_ndimension>=1);
+  _ndimension = processors.size();
+
   int parent_ndimension = parent._ndimension; assert(_ndimension >= parent._ndimension);
-  Coordinate parent_processor_coor(_ndimension,0);
-  Coordinate parent_processors    (_ndimension,1);
+  std::vector<int> parent_processor_coor(_ndimension,0);
+  std::vector<int> parent_processors    (_ndimension,1);
 
   // Can make 5d grid from 4d etc...
   int pad = _ndimension-parent_ndimension;
@@ -128,8 +124,10 @@ CartesianCommunicator::CartesianCommunicator(const Coordinate &processors,const
   // split the communicator
   //////////////////////////////////////////////////////////////////////////////////////////////////////
   //  int Nparent = parent._processors ; 
+  //  std::cout << " splitting from communicator "<<parent.communicator <<std::endl;
   int Nparent;
   MPI_Comm_size(parent.communicator,&Nparent);
+  //  std::cout << " Parent size  "<<Nparent <<std::endl;
 
   int childsize=1;
   for(int d=0;d<processors.size();d++) {
@@ -138,9 +136,11 @@ CartesianCommunicator::CartesianCommunicator(const Coordinate &processors,const
   int Nchild = Nparent/childsize;
   assert (childsize * Nchild == Nparent);
 
-  Coordinate ccoor(_ndimension); // coor within subcommunicator
-  Coordinate scoor(_ndimension); // coor of split within parent
-  Coordinate ssize(_ndimension); // coor of split within parent
+  //  std::cout << " child size  "<<childsize <<std::endl;
+
+  std::vector<int> ccoor(_ndimension); // coor within subcommunicator
+  std::vector<int> scoor(_ndimension); // coor of split within parent
+  std::vector<int> ssize(_ndimension); // coor of split within parent
 
   for(int d=0;d<_ndimension;d++){
     ccoor[d] = parent_processor_coor[d] % processors[d];
@@ -157,6 +157,36 @@ CartesianCommunicator::CartesianCommunicator(const Coordinate &processors,const
   MPI_Comm comm_split;
   if ( Nchild > 1 ) { 
 
+    if(0){
+      std::cout << GridLogMessage<<"Child communicator of "<< std::hex << parent.communicator << std::dec<<std::endl;
+      std::cout << GridLogMessage<<" parent grid["<< parent._ndimension<<"]    ";
+      for(int d=0;d<parent._ndimension;d++)  std::cout << parent._processors[d] << " ";
+      std::cout<<std::endl;
+      
+      std::cout << GridLogMessage<<" child grid["<< _ndimension <<"]    ";
+      for(int d=0;d<processors.size();d++)  std::cout << processors[d] << " ";
+      std::cout<<std::endl;
+      
+      std::cout << GridLogMessage<<" old rank "<< parent._processor<<" coor ["<< parent._ndimension <<"]    ";
+      for(int d=0;d<parent._ndimension;d++)  std::cout << parent._processor_coor[d] << " ";
+      std::cout<<std::endl;
+      
+      std::cout << GridLogMessage<<" new split "<< srank<<" scoor ["<< _ndimension <<"]    ";
+      for(int d=0;d<processors.size();d++)  std::cout << scoor[d] << " ";
+      std::cout<<std::endl;
+      
+      std::cout << GridLogMessage<<" new rank "<< crank<<" coor ["<< _ndimension <<"]    ";
+      for(int d=0;d<processors.size();d++)  std::cout << ccoor[d] << " ";
+      std::cout<<std::endl;
+
+      //////////////////////////////////////////////////////////////////////////////////////////////////////
+      // Declare victory
+      //////////////////////////////////////////////////////////////////////////////////////////////////////
+      std::cout << GridLogMessage<<"Divided communicator "<< parent._Nprocessors<<" into "
+		<< Nchild <<" communicators with " << childsize << " ranks"<<std::endl;
+      std::cout << " Split communicator " <<comm_split <<std::endl;
+    }
+
     ////////////////////////////////////////////////////////////////
     // Split the communicator
     ////////////////////////////////////////////////////////////////
@@ -178,7 +208,7 @@ CartesianCommunicator::CartesianCommunicator(const Coordinate &processors,const
   // Take the right SHM buffers
   //////////////////////////////////////////////////////////////////////////////////////////////////////
   SetCommunicator(comm_split);
-
+  
   ///////////////////////////////////////////////
   // Free the temp communicator 
   ///////////////////////////////////////////////
@@ -195,7 +225,7 @@ CartesianCommunicator::CartesianCommunicator(const Coordinate &processors,const
   }
 }
 
-void CartesianCommunicator::InitFromMPICommunicator(const Coordinate &processors, MPI_Comm communicator_base)
+void CartesianCommunicator::InitFromMPICommunicator(const std::vector<int> &processors, MPI_Comm communicator_base)
 {
   ////////////////////////////////////////////////////
   // Creates communicator, and the communicator_halo
@@ -212,7 +242,7 @@ void CartesianCommunicator::InitFromMPICommunicator(const Coordinate &processors
     _Nprocessors*=_processors[i];
   }
 
-  Coordinate periodic(_ndimension,1);
+  std::vector<int> periodic(_ndimension,1);
   MPI_Cart_create(communicator_base, _ndimension,&_processors[0],&periodic[0],0,&communicator);
   MPI_Comm_rank(communicator,&_processor);
   MPI_Cart_coords(communicator,_processor,_ndimension,&_processor_coor[0]);
@@ -255,10 +285,6 @@ void CartesianCommunicator::GlobalSum(uint64_t &u){
   int ierr=MPI_Allreduce(MPI_IN_PLACE,&u,1,MPI_UINT64_T,MPI_SUM,communicator);
   assert(ierr==0);
 }
-void CartesianCommunicator::GlobalSumVector(uint64_t* u,int N){
-  int ierr=MPI_Allreduce(MPI_IN_PLACE,u,N,MPI_UINT64_T,MPI_SUM,communicator);
-  assert(ierr==0);
-}
 void CartesianCommunicator::GlobalXOR(uint32_t &u){
   int ierr=MPI_Allreduce(MPI_IN_PLACE,&u,1,MPI_UINT32_T,MPI_BXOR,communicator);
   assert(ierr==0);
@@ -453,7 +479,7 @@ void CartesianCommunicator::BroadcastWorld(int root,void* data, int bytes)
 
 void CartesianCommunicator::AllToAll(int dim,void  *in,void *out,uint64_t words,uint64_t bytes)
 {
-  Coordinate row(_ndimension,1);
+  std::vector<int> row(_ndimension,1);
   assert(dim>=0 && dim<_ndimension);
 
   //  Split the communicator
@@ -482,6 +508,7 @@ void CartesianCommunicator::AllToAll(void  *in,void *out,uint64_t words,uint64_t
   MPI_Type_free(&object);
 }
 
-NAMESPACE_END(Grid);
 
 
+}
+

Grid/communicator/Communicator_none.cc

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,11 +23,11 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #include <Grid/GridCore.h>
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 // Info that is setup once and indept of cartesian layout
@@ -38,21 +38,21 @@ void CartesianCommunicator::Init(int *argc, char *** arv)
 {
   GlobalSharedMemory::Init(communicator_world);
   GlobalSharedMemory::SharedMemoryAllocate(
-					   GlobalSharedMemory::MAX_MPI_SHM_BYTES,
-					   GlobalSharedMemory::Hugepages);
+		   GlobalSharedMemory::MAX_MPI_SHM_BYTES,
+		   GlobalSharedMemory::Hugepages);
 }
 
-CartesianCommunicator::CartesianCommunicator(const Coordinate &processors,const CartesianCommunicator &parent,int &srank) 
+CartesianCommunicator::CartesianCommunicator(const std::vector<int> &processors,const CartesianCommunicator &parent,int &srank) 
   : CartesianCommunicator(processors) 
 {
   srank=0;
   SetCommunicator(communicator_world);
 }
 
-CartesianCommunicator::CartesianCommunicator(const Coordinate &processors)
+CartesianCommunicator::CartesianCommunicator(const std::vector<int> &processors)
 {
   _processors = processors;
-  _ndimension = processors.size();  assert(_ndimension>=1);
+  _ndimension = processors.size();
   _processor_coor.resize(_ndimension);
   
   // Require 1^N processor grid for fake
@@ -70,10 +70,9 @@ CartesianCommunicator::~CartesianCommunicator(){}
 void CartesianCommunicator::GlobalSum(float &){}
 void CartesianCommunicator::GlobalSumVector(float *,int N){}
 void CartesianCommunicator::GlobalSum(double &){}
-void CartesianCommunicator::GlobalSumVector(double *,int N){}
 void CartesianCommunicator::GlobalSum(uint32_t &){}
 void CartesianCommunicator::GlobalSum(uint64_t &){}
-void CartesianCommunicator::GlobalSumVector(uint64_t *,int N){}
+void CartesianCommunicator::GlobalSumVector(double *,int N){}
 void CartesianCommunicator::GlobalXOR(uint32_t &){}
 void CartesianCommunicator::GlobalXOR(uint64_t &){}
 
@@ -123,8 +122,8 @@ int  CartesianCommunicator::RankWorld(void){return 0;}
 void CartesianCommunicator::Barrier(void){}
 void CartesianCommunicator::Broadcast(int root,void* data, int bytes) {}
 void CartesianCommunicator::BroadcastWorld(int root,void* data, int bytes) { }
-int  CartesianCommunicator::RankFromProcessorCoor(Coordinate &coor) {  return 0;}
-void CartesianCommunicator::ProcessorCoorFromRank(int rank, Coordinate &coor){  coor = _processor_coor; }
+int  CartesianCommunicator::RankFromProcessorCoor(std::vector<int> &coor) {  return 0;}
+void CartesianCommunicator::ProcessorCoorFromRank(int rank, std::vector<int> &coor){  coor = _processor_coor; }
 void CartesianCommunicator::ShiftedRanks(int dim,int shift,int &source,int &dest)
 {
   source =0;
@@ -161,6 +160,6 @@ void CartesianCommunicator::StencilSendToRecvFromComplete(std::vector<CommsReque
 
 void CartesianCommunicator::StencilBarrier(void){};
 
-NAMESPACE_END(Grid);
 
+}
 

Grid/communicator/SharedMemory.cc

@@ -28,11 +28,10 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 
 #include <Grid/GridCore.h>
 
-NAMESPACE_BEGIN(Grid); 
+namespace Grid { 
 
 // static data
 
-int                 GlobalSharedMemory::HPEhypercube = 1;
 uint64_t            GlobalSharedMemory::MAX_MPI_SHM_BYTES   = 1024LL*1024LL*1024LL; 
 int                 GlobalSharedMemory::Hugepages = 0;
 int                 GlobalSharedMemory::_ShmSetup;
@@ -74,12 +73,9 @@ void *SharedMemory::ShmBufferMalloc(size_t bytes){
   if (heap_bytes >= heap_size) {
     std::cout<< " ShmBufferMalloc exceeded shared heap size -- try increasing with --shm <MB> flag" <<std::endl;
     std::cout<< " Parameter specified in units of MB (megabytes) " <<std::endl;
-    std::cout<< " Current alloc is " << (bytes/(1024*1024)) <<"MB"<<std::endl;
-    std::cout<< " Current bytes is " << (heap_bytes/(1024*1024)) <<"MB"<<std::endl;
-    std::cout<< " Current heap  is " << (heap_size/(1024*1024)) <<"MB"<<std::endl;
+    std::cout<< " Current value is " << (heap_size/(1024*1024)) <<std::endl;
     assert(heap_bytes<heap_size);
   }
-  //std::cerr << "ShmBufferMalloc "<<std::hex<< ptr<<" - "<<((uint64_t)ptr+bytes)<<std::dec<<std::endl;
   return ptr;
 }
 void SharedMemory::ShmBufferFreeAll(void) { 
@@ -88,9 +84,9 @@ void SharedMemory::ShmBufferFreeAll(void) {
 }
 void *SharedMemory::ShmBufferSelf(void)
 {
-  //std::cerr << "ShmBufferSelf "<<ShmRank<<" "<<std::hex<< ShmCommBufs[ShmRank] <<std::dec<<std::endl;
   return ShmCommBufs[ShmRank];
 }
 
-NAMESPACE_END(Grid); 
 
+
+}

Grid/communicator/SharedMemory.h

@@ -25,6 +25,18 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     See the full license in the file "LICENSE" in the top level distribution directory
 *************************************************************************************/
 /*  END LEGAL */
+
+
+// TODO
+// 1) move includes into SharedMemory.cc
+//
+// 2) split shared memory into a) optimal communicator creation from comm world
+// 
+//                             b) shared memory buffers container
+//                                -- static globally shared; init once
+//                                -- per instance set of buffers.
+//                                   
+
 #pragma once 
 
 #include <Grid/GridCore.h>
@@ -41,33 +53,30 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 #include <sys/shm.h>
 #include <sys/mman.h>
 #include <zlib.h>
+#ifdef HAVE_NUMAIF_H
+#include <numaif.h>
+#endif
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 #if defined (GRID_COMMS_MPI3) 
-typedef MPI_Comm    Grid_MPI_Comm;
-typedef MPI_Request CommsRequest_t;
+  typedef MPI_Comm    Grid_MPI_Comm;
+  typedef MPI_Request CommsRequest_t;
 #else 
-typedef int CommsRequest_t;
-typedef int Grid_MPI_Comm;
+  typedef int CommsRequest_t;
+  typedef int Grid_MPI_Comm;
 #endif
 
 class GlobalSharedMemory {
-private:
+ private:
   static const int     MAXLOG2RANKSPERNODE = 16;            
 
-
   // Init once lock on the buffer allocation
   static int      _ShmSetup;
   static int      _ShmAlloc;
   static uint64_t _ShmAllocBytes;
 
-public:
-  ///////////////////////////////////////
-  // HPE 8600 hypercube optimisation
-  ///////////////////////////////////////
-  static int HPEhypercube;
-
+ public:
   static int      ShmSetup(void)      { return _ShmSetup; }
   static int      ShmAlloc(void)      { return _ShmAlloc; }
   static uint64_t ShmAllocBytes(void) { return _ShmAllocBytes; }
@@ -93,17 +102,12 @@ public:
   // Create an optimal reordered communicator that makes MPI_Cart_create get it right
   //////////////////////////////////////////////////////////////////////////////////////
   static void Init(Grid_MPI_Comm comm); // Typically MPI_COMM_WORLD
-  static void OptimalCommunicator            (const Coordinate &processors,Grid_MPI_Comm & optimal_comm);  // Turns MPI_COMM_WORLD into right layout for Cartesian
-  static void OptimalCommunicatorHypercube   (const Coordinate &processors,Grid_MPI_Comm & optimal_comm);  // Turns MPI_COMM_WORLD into right layout for Cartesian
-  static void OptimalCommunicatorSharedMemory(const Coordinate &processors,Grid_MPI_Comm & optimal_comm);  // Turns MPI_COMM_WORLD into right layout for Cartesian
-  static void GetShmDims(const Coordinate &WorldDims,Coordinate &ShmDims);
+  static void OptimalCommunicator(const std::vector<int> &processors,Grid_MPI_Comm & optimal_comm);  // Turns MPI_COMM_WORLD into right layout for Cartesian
   ///////////////////////////////////////////////////
   // Provide shared memory facilities off comm world
   ///////////////////////////////////////////////////
   static void SharedMemoryAllocate(uint64_t bytes, int flags);
   static void SharedMemoryFree(void);
-  static void SharedMemoryCopy(void *dest,const void *src,size_t bytes);
-  static void SharedMemoryZero(void *dest,size_t bytes);
 
 };
 
@@ -112,14 +116,14 @@ public:
 //////////////////////////////
 class SharedMemory 
 {
-private:
+ private:
   static const int     MAXLOG2RANKSPERNODE = 16;            
 
   size_t heap_top;
   size_t heap_bytes;
   size_t heap_size;
 
-protected:
+ protected:
 
   Grid_MPI_Comm    ShmComm; // for barriers
   int    ShmRank; 
@@ -127,7 +131,7 @@ protected:
   std::vector<void *> ShmCommBufs;
   std::vector<int>    ShmRanks;// Mapping comm ranks to Shm ranks
 
-public:
+ public:
   SharedMemory() {};
   ~SharedMemory();
   ///////////////////////////////////////////////////////////////////////////////////////
@@ -144,7 +148,6 @@ public:
   // Call on any instance
   ///////////////////////////////////////////////////
   void SharedMemoryTest(void);
-  
   void *ShmBufferSelf(void);
   void *ShmBuffer    (int rank);
   void *ShmBufferTranslate(int rank,void * local_p);
@@ -159,5 +162,4 @@ public:
 
 };
 
-NAMESPACE_END(Grid);
-
+}

Grid/communicator/SharedMemoryMPI.cc

@@ -29,12 +29,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 #include <Grid/GridCore.h>
 #include <pwd.h>
 
-#ifdef GRID_NVCC
-#include <cuda_runtime_api.h>
-#endif
+namespace Grid { 
 
-NAMESPACE_BEGIN(Grid); 
-#define header "SharedMemoryMpi: "
 /*Construct from an MPI communicator*/
 void GlobalSharedMemory::Init(Grid_MPI_Comm comm)
 {
@@ -50,11 +46,6 @@ void GlobalSharedMemory::Init(Grid_MPI_Comm comm)
   MPI_Comm_split_type(comm, MPI_COMM_TYPE_SHARED, 0, MPI_INFO_NULL,&WorldShmComm);
   MPI_Comm_rank(WorldShmComm     ,&WorldShmRank);
   MPI_Comm_size(WorldShmComm     ,&WorldShmSize);
-
-  if ( WorldRank == 0) {
-    std::cout << header " World communicator of size " <<WorldSize << std::endl;  
-    std::cout << header " Node  communicator of size " <<WorldShmSize << std::endl;
-  }
   // WorldShmComm, WorldShmSize, WorldShmRank
 
   // WorldNodes
@@ -139,53 +130,9 @@ int Log2Size(int TwoToPower,int MAXLOG2)
   }
   return log2size;
 }
-void GlobalSharedMemory::OptimalCommunicator(const Coordinate &processors,Grid_MPI_Comm & optimal_comm)
-{
-  //////////////////////////////////////////////////////////////////////////////
-  // Look and see if it looks like an HPE 8600 based on hostname conventions
-  //////////////////////////////////////////////////////////////////////////////
-  const int namelen = _POSIX_HOST_NAME_MAX;
-  char name[namelen];
-  int R;
-  int I;
-  int N;
-  gethostname(name,namelen);
-  int nscan = sscanf(name,"r%di%dn%d",&R,&I,&N) ;
-
-  if(nscan==3 && HPEhypercube ) OptimalCommunicatorHypercube(processors,optimal_comm);
-  else                          OptimalCommunicatorSharedMemory(processors,optimal_comm);
-}
-static inline int divides(int a,int b)
-{
-  return ( b == ( (b/a)*a ) );
-}
-void GlobalSharedMemory::GetShmDims(const Coordinate &WorldDims,Coordinate &ShmDims)
-{
-  ////////////////////////////////////////////////////////////////
-  // Powers of 2,3,5 only in prime decomposition for now
-  ////////////////////////////////////////////////////////////////
-  int ndimension = WorldDims.size();
-  ShmDims=Coordinate(ndimension,1);
-
-  std::vector<int> primes({2,3,5});
-
-  int dim = 0;
-  int AutoShmSize = 1;
-  while(AutoShmSize != WorldShmSize) {
-    for(int p=0;p<primes.size();p++) {
-      int prime=primes[p];
-      if ( divides(prime,WorldDims[dim]/ShmDims[dim])
-        && divides(prime,WorldShmSize/AutoShmSize)  ) {
-	AutoShmSize*=prime;
-	ShmDims[dim]*=prime;
-	break;
-      }
-    }
-    dim=(dim+1) %ndimension;
-  }
-}
-void GlobalSharedMemory::OptimalCommunicatorHypercube(const Coordinate &processors,Grid_MPI_Comm & optimal_comm)
+void GlobalSharedMemory::OptimalCommunicator(const std::vector<int> &processors,Grid_MPI_Comm & optimal_comm)
 {
+#ifdef HYPERCUBE
   ////////////////////////////////////////////////////////////////
   // Assert power of two shm_size.
   ////////////////////////////////////////////////////////////////
@@ -226,9 +173,9 @@ void GlobalSharedMemory::OptimalCommunicatorHypercube(const Coordinate &processo
   }
 
   std::string hname(name);
-  //  std::cout << "hostname "<<hname<<std::endl;
-  //  std::cout << "R " << R << " I " << I << " N "<< N
-  //            << " hypercoor 0x"<<std::hex<<hypercoor<<std::dec<<std::endl;
+  std::cout << "hostname "<<hname<<std::endl;
+  std::cout << "R " << R << " I " << I << " N "<< N
+            << " hypercoor 0x"<<std::hex<<hypercoor<<std::dec<<std::endl;
 
   //////////////////////////////////////////////////////////////////
   // broadcast node 0's base coordinate for this partition.
@@ -250,13 +197,16 @@ void GlobalSharedMemory::OptimalCommunicatorHypercube(const Coordinate &processo
   // in a maximally symmetrical way
   ////////////////////////////////////////////////////////////////
   int ndimension              = processors.size();
-  Coordinate processor_coor(ndimension);
-  Coordinate WorldDims = processors;
-  Coordinate ShmDims  (ndimension);  Coordinate NodeDims (ndimension);
-  Coordinate ShmCoor  (ndimension);    Coordinate NodeCoor (ndimension);    Coordinate WorldCoor(ndimension);
-  Coordinate HyperCoor(ndimension);
-
-  GetShmDims(WorldDims,ShmDims);
+  std::vector<int> processor_coor(ndimension);
+  std::vector<int> WorldDims = processors;   std::vector<int> ShmDims  (ndimension,1);  std::vector<int> NodeDims (ndimension);
+  std::vector<int> ShmCoor  (ndimension);    std::vector<int> NodeCoor (ndimension);    std::vector<int> WorldCoor(ndimension);
+  std::vector<int> HyperCoor(ndimension);
+  int dim = 0;
+  for(int l2=0;l2<log2size;l2++){
+    while ( (WorldDims[dim] / ShmDims[dim]) <= 1 ) dim=(dim+1)%ndimension;
+    ShmDims[dim]*=2;
+    dim=(dim+1)%ndimension;
+  }
 
   ////////////////////////////////////////////////////////////////
   // Establish torus of processes and nodes with sub-blockings
@@ -275,7 +225,7 @@ void GlobalSharedMemory::OptimalCommunicatorHypercube(const Coordinate &processo
      HyperCoor[d]=hcoor & msk;  
      HyperCoor[d]=BinaryToGray(HyperCoor[d]); // Space filling curve magic
      hcoor = hcoor >> bits;
-  }
+  } 
   ////////////////////////////////////////////////////////////////
   // Check processor counts match
   ////////////////////////////////////////////////////////////////
@@ -303,19 +253,28 @@ void GlobalSharedMemory::OptimalCommunicatorHypercube(const Coordinate &processo
   /////////////////////////////////////////////////////////////////
   int ierr= MPI_Comm_split(WorldComm,0,rank,&optimal_comm);
   assert(ierr==0);
-}
-void GlobalSharedMemory::OptimalCommunicatorSharedMemory(const Coordinate &processors,Grid_MPI_Comm & optimal_comm)
-{
+#else 
+  ////////////////////////////////////////////////////////////////
+  // Assert power of two shm_size.
+  ////////////////////////////////////////////////////////////////
+  int log2size = Log2Size(WorldShmSize,MAXLOG2RANKSPERNODE);
+  assert(log2size != -1);
+
   ////////////////////////////////////////////////////////////////
   // Identify subblock of ranks on node spreading across dims
   // in a maximally symmetrical way
   ////////////////////////////////////////////////////////////////
   int ndimension              = processors.size();
-  Coordinate processor_coor(ndimension);
-  Coordinate WorldDims = processors; Coordinate ShmDims(ndimension);  Coordinate NodeDims (ndimension);
-  Coordinate ShmCoor(ndimension);    Coordinate NodeCoor(ndimension);   Coordinate WorldCoor(ndimension);
+  std::vector<int> processor_coor(ndimension);
+  std::vector<int> WorldDims = processors;   std::vector<int> ShmDims  (ndimension,1);  std::vector<int> NodeDims (ndimension);
+  std::vector<int> ShmCoor  (ndimension);    std::vector<int> NodeCoor (ndimension);    std::vector<int> WorldCoor(ndimension);
+  int dim = 0;
+  for(int l2=0;l2<log2size;l2++){
+    while ( (WorldDims[dim] / ShmDims[dim]) <= 1 ) dim=(dim+1)%ndimension;
+    ShmDims[dim]*=2;
+    dim=(dim+1)%ndimension;
+  }
 
-  GetShmDims(WorldDims,ShmDims);
   ////////////////////////////////////////////////////////////////
   // Establish torus of processes and nodes with sub-blockings
   ////////////////////////////////////////////////////////////////
@@ -347,6 +306,7 @@ void GlobalSharedMemory::OptimalCommunicatorSharedMemory(const Coordinate &proce
   /////////////////////////////////////////////////////////////////
   int ierr= MPI_Comm_split(WorldComm,0,rank,&optimal_comm);
   assert(ierr==0);
+#endif
 }
 ////////////////////////////////////////////////////////////////////////////////////////////
 // SHMGET
@@ -354,7 +314,7 @@ void GlobalSharedMemory::OptimalCommunicatorSharedMemory(const Coordinate &proce
 #ifdef GRID_MPI3_SHMGET
 void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
 {
-  std::cout << header "SharedMemoryAllocate "<< bytes<< " shmget implementation "<<std::endl;
+  std::cout << "SharedMemoryAllocate "<< bytes<< " shmget implementation "<<std::endl;
   assert(_ShmSetup==1);
   assert(_ShmAlloc==0);
 
@@ -377,7 +337,7 @@ void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
         int errsv = errno;
         printf("Errno %d\n",errsv);
         printf("key   %d\n",key);
-        printf("size  %ld\n",size);
+        printf("size  %lld\n",size);
         printf("flags %d\n",flags);
         perror("shmget");
         exit(1);
@@ -409,108 +369,14 @@ void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
   _ShmAllocBytes  = bytes;
 }
 #endif
-
+ 
 ////////////////////////////////////////////////////////////////////////////////////////////
 // Hugetlbfs mapping intended
 ////////////////////////////////////////////////////////////////////////////////////////////
-#ifdef GRID_NVCC
-void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
-{
-  void * ShmCommBuf ; 
-  assert(_ShmSetup==1);
-  assert(_ShmAlloc==0);
-
-  //////////////////////////////////////////////////////////////////////////////////////////////////////////
-  // allocate the pointer array for shared windows for our group
-  //////////////////////////////////////////////////////////////////////////////////////////////////////////
-  MPI_Barrier(WorldShmComm);
-  WorldShmCommBufs.resize(WorldShmSize);
-
-  //////////////////////////////////////////////////////////////////////////////////////////////////////////
-  // TODO/FIXME : NOT ALL NVLINK BOARDS have full Peer to peer connectivity.
-  // The annoyance is that they have partial peer 2 peer. This occurs on the 8 GPU blades.
-  // e.g. DGX1, supermicro board, 
-  //////////////////////////////////////////////////////////////////////////////////////////////////////////
-  //  cudaDeviceGetP2PAttribute(&perfRank, cudaDevP2PAttrPerformanceRank, device1, device2);
-
-#ifdef GRID_IBM_SUMMIT
-  // IBM Jsrun makes cuda Device numbering screwy and not match rank
-    std::cout << "IBM Summit or similar - NOT setting device to WorldShmRank"<<std::endl;
-#else
-    std::cout << "setting device to WorldShmRank"<<std::endl;
-    cudaSetDevice(WorldShmRank);
-#endif
-  ///////////////////////////////////////////////////////////////////////////////////////////////////////////
-  // Each MPI rank should allocate our own buffer
-  ///////////////////////////////////////////////////////////////////////////////////////////////////////////
-  auto err =  cudaMalloc(&ShmCommBuf, bytes);
-  if ( err !=  cudaSuccess) {
-    std::cerr << " SharedMemoryMPI.cc cudaMallocManaged failed for " << bytes<<" bytes " <<cudaGetErrorString(err)<< std::endl;
-    exit(EXIT_FAILURE);  
-  }
-  if (ShmCommBuf == (void *)NULL ) {
-    std::cerr << " SharedMemoryMPI.cc cudaMallocManaged failed NULL pointer for " << bytes<<" bytes " << std::endl;
-    exit(EXIT_FAILURE);  
-  }
-  if ( WorldRank == 0 ){
-    std::cout << header " SharedMemoryMPI.cc cudaMalloc "<< bytes << "bytes at "<< std::hex<< ShmCommBuf <<std::dec<<" for comms buffers " <<std::endl;
-  }
-  SharedMemoryZero(ShmCommBuf,bytes);
-
-  ///////////////////////////////////////////////////////////////////////////////////////////////////////////
-  // Loop over ranks/gpu's on our node
-  ///////////////////////////////////////////////////////////////////////////////////////////////////////////
-  for(int r=0;r<WorldShmSize;r++){
-    
-    //////////////////////////////////////////////////
-    // If it is me, pass around the IPC access key
-    //////////////////////////////////////////////////
-    cudaIpcMemHandle_t handle;
-    
-    if ( r==WorldShmRank ) { 
-      err = cudaIpcGetMemHandle(&handle,ShmCommBuf);
-      if ( err !=  cudaSuccess) {
-	std::cerr << " SharedMemoryMPI.cc cudaIpcGetMemHandle failed for rank" << r <<" "<<cudaGetErrorString(err)<< std::endl;
-	exit(EXIT_FAILURE);
-      }
-    }
-    //////////////////////////////////////////////////
-    // Share this IPC handle across the Shm Comm
-    //////////////////////////////////////////////////
-    { 
-      int ierr=MPI_Bcast(&handle,
-			 sizeof(handle),
-			 MPI_BYTE,
-			 r,
-			 WorldShmComm);
-      assert(ierr==0);
-    }
-    
-    ///////////////////////////////////////////////////////////////
-    // If I am not the source, overwrite thisBuf with remote buffer
-    ///////////////////////////////////////////////////////////////
-    void * thisBuf = ShmCommBuf;
-    if ( r!=WorldShmRank ) { 
-      err = cudaIpcOpenMemHandle(&thisBuf,handle,cudaIpcMemLazyEnablePeerAccess);
-      if ( err !=  cudaSuccess) {
-	std::cerr << " SharedMemoryMPI.cc cudaIpcOpenMemHandle failed for rank" << r <<" "<<cudaGetErrorString(err)<< std::endl;
-	exit(EXIT_FAILURE);
-      }
-    }
-    ///////////////////////////////////////////////////////////////
-    // Save a copy of the device buffers
-    ///////////////////////////////////////////////////////////////
-    WorldShmCommBufs[r] = thisBuf;
-  }
-
-  _ShmAllocBytes=bytes;
-  _ShmAlloc=1;
-}
-#else 
 #ifdef GRID_MPI3_SHMMMAP
 void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
 {
-  std::cout << header "SharedMemoryAllocate "<< bytes<< " MMAP implementation "<< GRID_SHM_PATH <<std::endl;
+  std::cout << "SharedMemoryAllocate "<< bytes<< " MMAP implementation "<< GRID_SHM_PATH <<std::endl;
   assert(_ShmSetup==1);
   assert(_ShmAlloc==0);
   //////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -547,7 +413,7 @@ void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
     assert(((uint64_t)ptr&0x3F)==0);
     close(fd);
     WorldShmCommBufs[r] =ptr;
-    //    std::cout << header "Set WorldShmCommBufs["<<r<<"]="<<ptr<< "("<< bytes<< "bytes)"<<std::endl;
+    std::cout << "Set WorldShmCommBufs["<<r<<"]="<<ptr<< "("<< bytes<< "bytes)"<<std::endl;
   }
   _ShmAlloc=1;
   _ShmAllocBytes  = bytes;
@@ -557,7 +423,7 @@ void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
 #ifdef GRID_MPI3_SHM_NONE
 void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
 {
-  std::cout << header "SharedMemoryAllocate "<< bytes<< " MMAP anonymous implementation "<<std::endl;
+  std::cout << "SharedMemoryAllocate "<< bytes<< " MMAP anonymous implementation "<<std::endl;
   assert(_ShmSetup==1);
   assert(_ShmAlloc==0);
   //////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -589,7 +455,7 @@ void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
     assert(((uint64_t)ptr&0x3F)==0);
     close(fd);
     WorldShmCommBufs[r] =ptr;
-    //    std::cout << "Set WorldShmCommBufs["<<r<<"]="<<ptr<< "("<< bytes<< "bytes)"<<std::endl;
+    std::cout << "Set WorldShmCommBufs["<<r<<"]="<<ptr<< "("<< bytes<< "bytes)"<<std::endl;
   }
   _ShmAlloc=1;
   _ShmAllocBytes  = bytes;
@@ -604,7 +470,7 @@ void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
 ////////////////////////////////////////////////////////////////////////////////////////////
 void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
 { 
-  std::cout << header "SharedMemoryAllocate "<< bytes<< " SHMOPEN implementation "<<std::endl;
+  std::cout << "SharedMemoryAllocate "<< bytes<< " SHMOPEN implementation "<<std::endl;
   assert(_ShmSetup==1);
   assert(_ShmAlloc==0); 
   MPI_Barrier(WorldShmComm);
@@ -633,7 +499,7 @@ void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
 #endif
       void * ptr =  mmap(NULL,size, PROT_READ | PROT_WRITE, mmap_flag, fd, 0);
       
-      //      std::cout << "Set WorldShmCommBufs["<<r<<"]="<<ptr<< "("<< size<< "bytes)"<<std::endl;
+      std::cout << "Set WorldShmCommBufs["<<r<<"]="<<ptr<< "("<< size<< "bytes)"<<std::endl;
       if ( ptr == (void * )MAP_FAILED ) {       
 	perror("failed mmap");     
 	assert(0);    
@@ -670,31 +536,14 @@ void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
   _ShmAllocBytes = bytes;
 }
 #endif
-#endif // End NVCC case for GPU device buffers
 
-/////////////////////////////////////////////////////////////////////////
-// Routines accessing shared memory should route through for GPU safety
-/////////////////////////////////////////////////////////////////////////
-void GlobalSharedMemory::SharedMemoryZero(void *dest,size_t bytes)
-{
-#ifdef GRID_NVCC
-  cudaMemset(dest,0,bytes);
-#else
-  bzero(dest,bytes);
-#endif
-}
-void GlobalSharedMemory::SharedMemoryCopy(void *dest,const void *src,size_t bytes)
-{
-#ifdef GRID_NVCC
-  cudaMemcpy(dest,src,bytes,cudaMemcpyDefault);
-#else   
-  bcopy(src,dest,bytes);
-#endif
-}
-////////////////////////////////////////////////////////
-// Global shared functionality finished
-// Now move to per communicator functionality
-////////////////////////////////////////////////////////
+
+
+
+  ////////////////////////////////////////////////////////
+  // Global shared functionality finished
+  // Now move to per communicator functionality
+  ////////////////////////////////////////////////////////
 void SharedMemory::SetCommunicator(Grid_MPI_Comm comm)
 {
   int rank, size;
@@ -722,6 +571,7 @@ void SharedMemory::SetCommunicator(Grid_MPI_Comm comm)
     MPI_Allreduce(MPI_IN_PLACE,&wsr,1,MPI_UINT32_T,MPI_SUM,ShmComm);
 
     ShmCommBufs[r] = GlobalSharedMemory::WorldShmCommBufs[wsr];
+    //    std::cout << "SetCommunicator ShmCommBufs ["<< r<< "] = "<< ShmCommBufs[r]<< "  wsr = "<<wsr<<std::endl;
   }
   ShmBufferFreeAll();
 
@@ -734,26 +584,6 @@ void SharedMemory::SetCommunicator(Grid_MPI_Comm comm)
 
   std::vector<int> ranks(size);   for(int r=0;r<size;r++) ranks[r]=r;
   MPI_Group_translate_ranks (FullGroup,size,&ranks[0],ShmGroup, &ShmRanks[0]); 
-
-#ifdef GRID_IBM_SUMMIT
-  // Hide the shared memory path between sockets 
-  // if even number of nodes
-  if ( (ShmSize & 0x1)==0 ) {
-    int SocketSize = ShmSize/2;
-    int mySocket = ShmRank/SocketSize; 
-    for(int r=0;r<size;r++){
-      int hisRank=ShmRanks[r];
-      if ( hisRank!= MPI_UNDEFINED ) {
-	int hisSocket=hisRank/SocketSize;
-	if ( hisSocket != mySocket ) {
-	  ShmRanks[r] = MPI_UNDEFINED;
-	}
-      }
-    }
-  }
-#endif
-
-  SharedMemoryTest();
 }
 //////////////////////////////////////////////////////////////////
 // On node barrier
@@ -768,26 +598,24 @@ void SharedMemory::ShmBarrier(void)
 void SharedMemory::SharedMemoryTest(void)
 {
   ShmBarrier();
-  uint64_t check[3];
-  uint64_t magic = 0x5A5A5A;
   if ( ShmRank == 0 ) {
-    for(uint64_t r=0;r<ShmSize;r++){
-       check[0]=GlobalSharedMemory::WorldNode;
-       check[1]=r;
-       check[2]=magic;
-       GlobalSharedMemory::SharedMemoryCopy( ShmCommBufs[r], check, 3*sizeof(uint64_t));
+    for(int r=0;r<ShmSize;r++){
+      uint64_t * check = (uint64_t *) ShmCommBufs[r];
+      check[0] = GlobalSharedMemory::WorldNode;
+      check[1] = r;
+      check[2] = 0x5A5A5A;
     }
   }
   ShmBarrier();
-  for(uint64_t r=0;r<ShmSize;r++){
-    ShmBarrier();
-    GlobalSharedMemory::SharedMemoryCopy(check,ShmCommBufs[r], 3*sizeof(uint64_t));
-    ShmBarrier();
+  for(int r=0;r<ShmSize;r++){
+    uint64_t * check = (uint64_t *) ShmCommBufs[r];
+    
     assert(check[0]==GlobalSharedMemory::WorldNode);
     assert(check[1]==r);
-    assert(check[2]==magic);
-    ShmBarrier();
+    assert(check[2]==0x5A5A5A);
+    
   }
+  ShmBarrier();
 }
 
 void *SharedMemory::ShmBuffer(int rank)
@@ -801,6 +629,7 @@ void *SharedMemory::ShmBuffer(int rank)
 }
 void *SharedMemory::ShmBufferTranslate(int rank,void * local_p)
 {
+  static int count =0;
   int gpeer = ShmRanks[rank];
   assert(gpeer!=ShmRank); // never send to self
   if (gpeer == MPI_UNDEFINED){
@@ -819,5 +648,4 @@ SharedMemory::~SharedMemory()
   }
 };
 
-NAMESPACE_END(Grid); 
-
+}

Grid/communicator/SharedMemoryNone.cc

@@ -28,7 +28,7 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 
 #include <Grid/GridCore.h>
 
-NAMESPACE_BEGIN(Grid); 
+namespace Grid { 
 
 /*Construct from an MPI communicator*/
 void GlobalSharedMemory::Init(Grid_MPI_Comm comm)
@@ -47,7 +47,7 @@ void GlobalSharedMemory::Init(Grid_MPI_Comm comm)
   _ShmSetup=1;
 }
 
-void GlobalSharedMemory::OptimalCommunicator(const Coordinate &processors,Grid_MPI_Comm & optimal_comm)
+void GlobalSharedMemory::OptimalCommunicator(const std::vector<int> &processors,Grid_MPI_Comm & optimal_comm)
 {
   optimal_comm = WorldComm;
 }
@@ -84,10 +84,10 @@ void GlobalSharedMemory::SharedMemoryAllocate(uint64_t bytes, int flags)
   _ShmAlloc=1;
 };
 
-////////////////////////////////////////////////////////
-// Global shared functionality finished
-// Now move to per communicator functionality
-////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////
+  // Global shared functionality finished
+  // Now move to per communicator functionality
+  ////////////////////////////////////////////////////////
 void SharedMemory::SetCommunicator(Grid_MPI_Comm comm)
 {
   assert(GlobalSharedMemory::ShmAlloc()==1);
@@ -125,5 +125,4 @@ void *SharedMemory::ShmBufferTranslate(int rank,void * local_p)
 SharedMemory::~SharedMemory()
 {};
 
-NAMESPACE_END(Grid); 
-
+}

Grid/cshift/Cshift.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,8 +23,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef _GRID_CSHIFT_H_
 #define _GRID_CSHIFT_H_
 
@@ -49,29 +49,4 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 #ifdef GRID_COMMS_SHMEM
 #include <Grid/cshift/Cshift_mpi.h> // uses same implementation of communicator
 #endif 
-
-NAMESPACE_BEGIN(Grid);
-
-template<typename Op, typename T1> 
-auto Cshift(const LatticeUnaryExpression<Op,T1> &expr,int dim,int shift)
-    -> Lattice<decltype(expr.op.func(eval(0, expr.arg1)))> 
-{
-  return Cshift(closure(expr),dim,shift);
-}
-template <class Op, class T1, class T2>
-auto Cshift(const LatticeBinaryExpression<Op,T1,T2> &expr,int dim,int shift)
-  -> Lattice<decltype(expr.op.func(eval(0, expr.arg1),eval(0, expr.arg2)))> 
-{
-  return Cshift(closure(expr),dim,shift);
-}
-template <class Op, class T1, class T2, class T3>
-auto Cshift(const LatticeTrinaryExpression<Op,T1,T2,T3> &expr,int dim,int shift)
-  -> Lattice<decltype(expr.op.func(eval(0, expr.arg1),
-				   eval(0, expr.arg2),
-				   eval(0, expr.arg3)))> 
-{
-  return Cshift(closure(expr),dim,shift);
-}
-NAMESPACE_END(Grid);
-
 #endif

Grid/cshift/Cshift_common.h

@@ -25,9 +25,10 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     See the full license in the file "LICENSE" in the top level distribution directory
     *************************************************************************************/
     /*  END LEGAL */
-#pragma once
+#ifndef _GRID_CSHIFT_COMMON_H_
+#define _GRID_CSHIFT_COMMON_H_
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 ///////////////////////////////////////////////////////////////////
 // Gather for when there is no need to SIMD split 
@@ -35,21 +36,20 @@ NAMESPACE_BEGIN(Grid);
 template<class vobj> void 
 Gather_plane_simple (const Lattice<vobj> &rhs,commVector<vobj> &buffer,int dimension,int plane,int cbmask, int off=0)
 {
-  int rd = rhs.Grid()->_rdimensions[dimension];
+  int rd = rhs._grid->_rdimensions[dimension];
 
-  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
+  if ( !rhs._grid->CheckerBoarded(dimension) ) {
     cbmask = 0x3;
   }
   
-  int so=plane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
-  int e1=rhs.Grid()->_slice_nblock[dimension];
-  int e2=rhs.Grid()->_slice_block[dimension];
+  int so=plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int e1=rhs._grid->_slice_nblock[dimension];
+  int e2=rhs._grid->_slice_block[dimension];
   int ent = 0;
 
-  static Vector<std::pair<int,int> > table; table.resize(e1*e2);
-  int stride=rhs.Grid()->_slice_stride[dimension];
+  static std::vector<std::pair<int,int> > table; table.resize(e1*e2);
 
-  auto rhs_v = rhs.View();
+  int stride=rhs._grid->_slice_stride[dimension];
   if ( cbmask == 0x3 ) { 
     for(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
@@ -63,68 +63,66 @@ Gather_plane_simple (const Lattice<vobj> &rhs,commVector<vobj> &buffer,int dimen
      for(int n=0;n<e1;n++){
        for(int b=0;b<e2;b++){
 	 int o  = n*stride;
-	 int ocb=1<<rhs.Grid()->CheckerBoardFromOindex(o+b);
+	 int ocb=1<<rhs._grid->CheckerBoardFromOindex(o+b);
 	 if ( ocb &cbmask ) {
 	   table[ent++]=std::pair<int,int> (off+bo++,so+o+b);
 	 }
        }
      }
   }
-  thread_for(i,ent,{
-    buffer[table[i].first]=rhs_v[table[i].second];
-  });
+  parallel_for(int i=0;i<ent;i++){
+    buffer[table[i].first]=rhs._odata[table[i].second];
+  }
 }
 
 ///////////////////////////////////////////////////////////////////
 // Gather for when there *is* need to SIMD split 
 ///////////////////////////////////////////////////////////////////
 template<class vobj> void 
-Gather_plane_extract(const Lattice<vobj> &rhs,
-		     ExtractPointerArray<typename vobj::scalar_object> pointers,
-		     int dimension,int plane,int cbmask)
+Gather_plane_extract(const Lattice<vobj> &rhs,std::vector<typename vobj::scalar_object *> pointers,int dimension,int plane,int cbmask)
 {
-  int rd = rhs.Grid()->_rdimensions[dimension];
+  int rd = rhs._grid->_rdimensions[dimension];
 
-  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
+  if ( !rhs._grid->CheckerBoarded(dimension) ) {
     cbmask = 0x3;
   }
 
-  int so  = plane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
+  int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
 
-  int e1=rhs.Grid()->_slice_nblock[dimension];
-  int e2=rhs.Grid()->_slice_block[dimension];
-  int n1=rhs.Grid()->_slice_stride[dimension];
+  int e1=rhs._grid->_slice_nblock[dimension];
+  int e2=rhs._grid->_slice_block[dimension];
+  int n1=rhs._grid->_slice_stride[dimension];
 
-  auto rhs_v = rhs.View();
   if ( cbmask ==0x3){
-    thread_for_collapse(2,n,e1,{
+    parallel_for_nest2(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
 
 	int o      =   n*n1;
 	int offset = b+n*e2;
 	
-	vobj temp =rhs_v[so+o+b];
+	vobj temp =rhs._odata[so+o+b];
 	extract<vobj>(temp,pointers,offset);
+
       }
-    });
+    }
   } else { 
 
     // Case of SIMD split AND checker dim cannot currently be hit, except in 
     // Test_cshift_red_black code.
     std::cout << " Dense packed buffer WARNING " <<std::endl;
-    thread_for_collapse(2,n,e1,{
+    parallel_for_nest2(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
 
 	int o=n*n1;
-	int ocb=1<<rhs.Grid()->CheckerBoardFromOindex(o+b);
+	int ocb=1<<rhs._grid->CheckerBoardFromOindex(o+b);
 	int offset = b+n*e2;
 
 	if ( ocb & cbmask ) {
-	  vobj temp =rhs_v[so+o+b];
+	  vobj temp =rhs._odata[so+o+b];
 	  extract<vobj>(temp,pointers,offset);
 	}
       }
-    });
+    }
   }
 }
 
@@ -133,17 +131,17 @@ Gather_plane_extract(const Lattice<vobj> &rhs,
 //////////////////////////////////////////////////////
 template<class vobj> void Scatter_plane_simple (Lattice<vobj> &rhs,commVector<vobj> &buffer, int dimension,int plane,int cbmask)
 {
-  int rd = rhs.Grid()->_rdimensions[dimension];
+  int rd = rhs._grid->_rdimensions[dimension];
 
-  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
+  if ( !rhs._grid->CheckerBoarded(dimension) ) {
     cbmask=0x3;
   }
 
-  int so  = plane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
+  int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
     
-  int e1=rhs.Grid()->_slice_nblock[dimension];
-  int e2=rhs.Grid()->_slice_block[dimension];
-  int stride=rhs.Grid()->_slice_stride[dimension];
+  int e1=rhs._grid->_slice_nblock[dimension];
+  int e2=rhs._grid->_slice_block[dimension];
+  int stride=rhs._grid->_slice_stride[dimension];
 
   static std::vector<std::pair<int,int> > table; table.resize(e1*e2);
   int ent    =0;
@@ -152,8 +150,8 @@ template<class vobj> void Scatter_plane_simple (Lattice<vobj> &rhs,commVector<vo
 
     for(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
-	int o   =n*rhs.Grid()->_slice_stride[dimension];
-	int bo  =n*rhs.Grid()->_slice_block[dimension];
+	int o   =n*rhs._grid->_slice_stride[dimension];
+	int bo  =n*rhs._grid->_slice_block[dimension];
 	table[ent++] = std::pair<int,int>(so+o+b,bo+b);
       }
     }
@@ -162,60 +160,57 @@ template<class vobj> void Scatter_plane_simple (Lattice<vobj> &rhs,commVector<vo
     int bo=0;
     for(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
-	int o   =n*rhs.Grid()->_slice_stride[dimension];
-	int ocb=1<<rhs.Grid()->CheckerBoardFromOindex(o+b);// Could easily be a table lookup
+	int o   =n*rhs._grid->_slice_stride[dimension];
+	int ocb=1<<rhs._grid->CheckerBoardFromOindex(o+b);// Could easily be a table lookup
 	if ( ocb & cbmask ) {
 	  table[ent++]=std::pair<int,int> (so+o+b,bo++);
 	}
       }
     }
   }
-  
-  auto rhs_v = rhs.View();
-  thread_for(i,ent,{
-    rhs_v[table[i].first]=buffer[table[i].second];
-  });
+
+  parallel_for(int i=0;i<ent;i++){
+    rhs._odata[table[i].first]=buffer[table[i].second];
+  }
 }
 
 //////////////////////////////////////////////////////
 // Scatter for when there *is* need to SIMD split
 //////////////////////////////////////////////////////
-template<class vobj> void Scatter_plane_merge(Lattice<vobj> &rhs,ExtractPointerArray<typename vobj::scalar_object> pointers,int dimension,int plane,int cbmask)
+template<class vobj> void Scatter_plane_merge(Lattice<vobj> &rhs,std::vector<typename vobj::scalar_object *> pointers,int dimension,int plane,int cbmask)
 {
-  int rd = rhs.Grid()->_rdimensions[dimension];
+  int rd = rhs._grid->_rdimensions[dimension];
 
-  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
+  if ( !rhs._grid->CheckerBoarded(dimension) ) {
     cbmask=0x3;
   }
 
-  int so  = plane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
+  int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
     
-  int e1=rhs.Grid()->_slice_nblock[dimension];
-  int e2=rhs.Grid()->_slice_block[dimension];
+  int e1=rhs._grid->_slice_nblock[dimension];
+  int e2=rhs._grid->_slice_block[dimension];
 
   if(cbmask ==0x3 ) {
-    auto rhs_v = rhs.View();
-    thread_for_collapse(2,n,e1,{
+    parallel_for_nest2(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
-	int o      = n*rhs.Grid()->_slice_stride[dimension];
-	int offset = b+n*rhs.Grid()->_slice_block[dimension];
-	merge(rhs_v[so+o+b],pointers,offset);
+	int o      = n*rhs._grid->_slice_stride[dimension];
+	int offset = b+n*rhs._grid->_slice_block[dimension];
+	merge(rhs._odata[so+o+b],pointers,offset);
       }
-    });
+    }
   } else { 
 
     // Case of SIMD split AND checker dim cannot currently be hit, except in 
     // Test_cshift_red_black code.
     //    std::cout << "Scatter_plane merge assert(0); think this is buggy FIXME "<< std::endl;// think this is buggy FIXME
     std::cout<<" Unthreaded warning -- buffer is not densely packed ??"<<std::endl;
-    auto rhs_v = rhs.View();
     for(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
-	int o      = n*rhs.Grid()->_slice_stride[dimension];
-	int offset = b+n*rhs.Grid()->_slice_block[dimension];
-	int ocb=1<<rhs.Grid()->CheckerBoardFromOindex(o+b);
+	int o      = n*rhs._grid->_slice_stride[dimension];
+	int offset = b+n*rhs._grid->_slice_block[dimension];
+	int ocb=1<<rhs._grid->CheckerBoardFromOindex(o+b);
 	if ( ocb&cbmask ) {
-	  merge(rhs_v[so+o+b],pointers,offset);
+	  merge(rhs._odata[so+o+b],pointers,offset);
 	}
       }
     }
@@ -227,18 +222,18 @@ template<class vobj> void Scatter_plane_merge(Lattice<vobj> &rhs,ExtractPointerA
 //////////////////////////////////////////////////////
 template<class vobj> void Copy_plane(Lattice<vobj>& lhs,const Lattice<vobj> &rhs, int dimension,int lplane,int rplane,int cbmask)
 {
-  int rd = rhs.Grid()->_rdimensions[dimension];
+  int rd = rhs._grid->_rdimensions[dimension];
 
-  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
+  if ( !rhs._grid->CheckerBoarded(dimension) ) {
     cbmask=0x3;
   }
 
-  int ro  = rplane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
-  int lo  = lplane*lhs.Grid()->_ostride[dimension]; // base offset for start of plane 
+  int ro  = rplane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int lo  = lplane*lhs._grid->_ostride[dimension]; // base offset for start of plane 
 
-  int e1=rhs.Grid()->_slice_nblock[dimension]; // clearly loop invariant for icpc
-  int e2=rhs.Grid()->_slice_block[dimension];
-  int stride = rhs.Grid()->_slice_stride[dimension];
+  int e1=rhs._grid->_slice_nblock[dimension]; // clearly loop invariant for icpc
+  int e2=rhs._grid->_slice_block[dimension];
+  int stride = rhs._grid->_slice_stride[dimension];
   static std::vector<std::pair<int,int> > table; table.resize(e1*e2);
   int ent=0;
 
@@ -253,7 +248,7 @@ template<class vobj> void Copy_plane(Lattice<vobj>& lhs,const Lattice<vobj> &rhs
     for(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
         int o =n*stride+b;
-        int ocb=1<<lhs.Grid()->CheckerBoardFromOindex(o);
+        int ocb=1<<lhs._grid->CheckerBoardFromOindex(o);
         if ( ocb&cbmask ) {
 	  table[ent++] = std::pair<int,int>(lo+o,ro+o);
 	}
@@ -261,33 +256,32 @@ template<class vobj> void Copy_plane(Lattice<vobj>& lhs,const Lattice<vobj> &rhs
     }
   }
 
-  auto rhs_v = rhs.View();
-  auto lhs_v = lhs.View();
-  thread_for(i,ent,{
-    lhs_v[table[i].first]=rhs_v[table[i].second];
-  });
+  parallel_for(int i=0;i<ent;i++){
+    lhs._odata[table[i].first]=rhs._odata[table[i].second];
+  }
 
 }
 
 template<class vobj> void Copy_plane_permute(Lattice<vobj>& lhs,const Lattice<vobj> &rhs, int dimension,int lplane,int rplane,int cbmask,int permute_type)
 {
  
-  int rd = rhs.Grid()->_rdimensions[dimension];
+  int rd = rhs._grid->_rdimensions[dimension];
 
-  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
+  if ( !rhs._grid->CheckerBoarded(dimension) ) {
     cbmask=0x3;
   }
 
-  int ro  = rplane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
-  int lo  = lplane*lhs.Grid()->_ostride[dimension]; // base offset for start of plane 
+  int ro  = rplane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int lo  = lplane*lhs._grid->_ostride[dimension]; // base offset for start of plane 
 
-  int e1=rhs.Grid()->_slice_nblock[dimension];
-  int e2=rhs.Grid()->_slice_block [dimension];
-  int stride = rhs.Grid()->_slice_stride[dimension];
+  int e1=rhs._grid->_slice_nblock[dimension];
+  int e2=rhs._grid->_slice_block [dimension];
+  int stride = rhs._grid->_slice_stride[dimension];
 
   static std::vector<std::pair<int,int> > table;  table.resize(e1*e2);
   int ent=0;
 
+  double t_tab,t_perm;
   if ( cbmask == 0x3 ) {
     for(int n=0;n<e1;n++){
     for(int b=0;b<e2;b++){
@@ -298,16 +292,14 @@ template<class vobj> void Copy_plane_permute(Lattice<vobj>& lhs,const Lattice<vo
     for(int n=0;n<e1;n++){
     for(int b=0;b<e2;b++){
       int o  =n*stride;
-      int ocb=1<<lhs.Grid()->CheckerBoardFromOindex(o+b);
+      int ocb=1<<lhs._grid->CheckerBoardFromOindex(o+b);
       if ( ocb&cbmask ) table[ent++] = std::pair<int,int>(lo+o+b,ro+o+b);
     }}
   }
 
-  auto rhs_v = rhs.View();
-  auto lhs_v = lhs.View();
-  thread_for(i,ent,{
-    permute(lhs_v[table[i].first],rhs_v[table[i].second],permute_type);
-  });
+  parallel_for(int i=0;i<ent;i++){
+    permute(lhs._odata[table[i].first],rhs._odata[table[i].second],permute_type);
+  }
 }
 
 //////////////////////////////////////////////////////
@@ -317,9 +309,11 @@ template<class vobj> void Cshift_local(Lattice<vobj>& ret,const Lattice<vobj> &r
 {
   int sshift[2];
 
-  sshift[0] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Even);
-  sshift[1] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Odd);
+  sshift[0] = rhs._grid->CheckerBoardShiftForCB(rhs.checkerboard,dimension,shift,Even);
+  sshift[1] = rhs._grid->CheckerBoardShiftForCB(rhs.checkerboard,dimension,shift,Odd);
 
+  double t_local;
+  
   if ( sshift[0] == sshift[1] ) {
     Cshift_local(ret,rhs,dimension,shift,0x3);
   } else {
@@ -330,7 +324,7 @@ template<class vobj> void Cshift_local(Lattice<vobj>& ret,const Lattice<vobj> &r
 
 template<class vobj> void Cshift_local(Lattice<vobj> &ret,const Lattice<vobj> &rhs,int dimension,int shift,int cbmask)
 {
-  GridBase *grid = rhs.Grid();
+  GridBase *grid = rhs._grid;
   int fd = grid->_fdimensions[dimension];
   int rd = grid->_rdimensions[dimension];
   int ld = grid->_ldimensions[dimension];
@@ -341,18 +335,18 @@ template<class vobj> void Cshift_local(Lattice<vobj> &ret,const Lattice<vobj> &r
   shift = (shift+fd)%fd;
 
   // the permute type
-  ret.Checkerboard() = grid->CheckerBoardDestination(rhs.Checkerboard(),shift,dimension);
+  ret.checkerboard = grid->CheckerBoardDestination(rhs.checkerboard,shift,dimension);
   int permute_dim =grid->PermuteDim(dimension);
   int permute_type=grid->PermuteType(dimension);
   int permute_type_dist;
 
   for(int x=0;x<rd;x++){       
 
-    //    int o   = 0;
+    int o   = 0;
     int bo  = x * grid->_ostride[dimension];
     int cb= (cbmask==0x2)? Odd : Even;
 
-    int sshift = grid->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,cb);
+    int sshift = grid->CheckerBoardShiftForCB(rhs.checkerboard,dimension,shift,cb);
     int sx     = (x+sshift)%rd;
     
     // wrap is whether sshift > rd.
@@ -393,5 +387,5 @@ template<class vobj> void Cshift_local(Lattice<vobj> &ret,const Lattice<vobj> &r
   
   }
 }
-NAMESPACE_END(Grid);
-
+}
+#endif

Grid/cshift/Cshift_mpi.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,33 +24,33 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef _GRID_CSHIFT_MPI_H_
 #define _GRID_CSHIFT_MPI_H_
 
 
-NAMESPACE_BEGIN(Grid); 
+namespace Grid { 
 
 template<class vobj> Lattice<vobj> Cshift(const Lattice<vobj> &rhs,int dimension,int shift)
 {
   typedef typename vobj::vector_type vector_type;
   typedef typename vobj::scalar_type scalar_type;
 
-  Lattice<vobj> ret(rhs.Grid()); 
+  Lattice<vobj> ret(rhs._grid); 
   
-  int fd = rhs.Grid()->_fdimensions[dimension];
-  int rd = rhs.Grid()->_rdimensions[dimension];
+  int fd = rhs._grid->_fdimensions[dimension];
+  int rd = rhs._grid->_rdimensions[dimension];
 
   // Map to always positive shift modulo global full dimension.
   shift = (shift+fd)%fd;
 
-  ret.Checkerboard() = rhs.Grid()->CheckerBoardDestination(rhs.Checkerboard(),shift,dimension);
+  ret.checkerboard = rhs._grid->CheckerBoardDestination(rhs.checkerboard,shift,dimension);
         
   // the permute type
-  int simd_layout     = rhs.Grid()->_simd_layout[dimension];
-  int comm_dim        = rhs.Grid()->_processors[dimension] >1 ;
-  int splice_dim      = rhs.Grid()->_simd_layout[dimension]>1 && (comm_dim);
+  int simd_layout     = rhs._grid->_simd_layout[dimension];
+  int comm_dim        = rhs._grid->_processors[dimension] >1 ;
+  int splice_dim      = rhs._grid->_simd_layout[dimension]>1 && (comm_dim);
 
 
   if ( !comm_dim ) {
@@ -70,10 +70,10 @@ template<class vobj> void Cshift_comms(Lattice<vobj>& ret,const Lattice<vobj> &r
 {
   int sshift[2];
 
-  sshift[0] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Even);
-  sshift[1] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Odd);
+  sshift[0] = rhs._grid->CheckerBoardShiftForCB(rhs.checkerboard,dimension,shift,Even);
+  sshift[1] = rhs._grid->CheckerBoardShiftForCB(rhs.checkerboard,dimension,shift,Odd);
 
-  //  std::cout << "Cshift_comms dim "<<dimension<<"cb "<<rhs.Checkerboard()<<"shift "<<shift<<" sshift " << sshift[0]<<" "<<sshift[1]<<std::endl;
+  //  std::cout << "Cshift_comms dim "<<dimension<<"cb "<<rhs.checkerboard<<"shift "<<shift<<" sshift " << sshift[0]<<" "<<sshift[1]<<std::endl;
   if ( sshift[0] == sshift[1] ) {
     //    std::cout << "Single pass Cshift_comms" <<std::endl;
     Cshift_comms(ret,rhs,dimension,shift,0x3);
@@ -88,8 +88,8 @@ template<class vobj> void Cshift_comms_simd(Lattice<vobj>& ret,const Lattice<vob
 {
   int sshift[2];
 
-  sshift[0] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Even);
-  sshift[1] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Odd);
+  sshift[0] = rhs._grid->CheckerBoardShiftForCB(rhs.checkerboard,dimension,shift,Even);
+  sshift[1] = rhs._grid->CheckerBoardShiftForCB(rhs.checkerboard,dimension,shift,Odd);
 
   //std::cout << "Cshift_comms_simd dim "<<dimension<<"cb "<<rhs.checkerboard<<"shift "<<shift<<" sshift " << sshift[0]<<" "<<sshift[1]<<std::endl;
   if ( sshift[0] == sshift[1] ) {
@@ -107,25 +107,25 @@ template<class vobj> void Cshift_comms(Lattice<vobj> &ret,const Lattice<vobj> &r
   typedef typename vobj::vector_type vector_type;
   typedef typename vobj::scalar_type scalar_type;
 
-  GridBase *grid=rhs.Grid();
-  Lattice<vobj> temp(rhs.Grid());
+  GridBase *grid=rhs._grid;
+  Lattice<vobj> temp(rhs._grid);
 
-  int fd              = rhs.Grid()->_fdimensions[dimension];
-  int rd              = rhs.Grid()->_rdimensions[dimension];
-  int pd              = rhs.Grid()->_processors[dimension];
-  int simd_layout     = rhs.Grid()->_simd_layout[dimension];
-  int comm_dim        = rhs.Grid()->_processors[dimension] >1 ;
+  int fd              = rhs._grid->_fdimensions[dimension];
+  int rd              = rhs._grid->_rdimensions[dimension];
+  int pd              = rhs._grid->_processors[dimension];
+  int simd_layout     = rhs._grid->_simd_layout[dimension];
+  int comm_dim        = rhs._grid->_processors[dimension] >1 ;
   assert(simd_layout==1);
   assert(comm_dim==1);
   assert(shift>=0);
   assert(shift<fd);
   
-  int buffer_size = rhs.Grid()->_slice_nblock[dimension]*rhs.Grid()->_slice_block[dimension];
+  int buffer_size = rhs._grid->_slice_nblock[dimension]*rhs._grid->_slice_block[dimension];
   commVector<vobj> send_buf(buffer_size);
   commVector<vobj> recv_buf(buffer_size);
 
   int cb= (cbmask==0x2)? Odd : Even;
-  int sshift= rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,cb);
+  int sshift= rhs._grid->CheckerBoardShiftForCB(rhs.checkerboard,dimension,shift,cb);
 
   for(int x=0;x<rd;x++){       
 
@@ -145,7 +145,7 @@ template<class vobj> void Cshift_comms(Lattice<vobj> &ret,const Lattice<vobj> &r
 
       Gather_plane_simple (rhs,send_buf,dimension,sx,cbmask);
 
-      //      int rank           = grid->_processor;
+      int rank           = grid->_processor;
       int recv_from_rank;
       int xmit_to_rank;
       grid->ShiftedRanks(dimension,comm_proc,xmit_to_rank,recv_from_rank);
@@ -165,7 +165,7 @@ template<class vobj> void Cshift_comms(Lattice<vobj> &ret,const Lattice<vobj> &r
 
 template<class vobj> void  Cshift_comms_simd(Lattice<vobj> &ret,const Lattice<vobj> &rhs,int dimension,int shift,int cbmask)
 {
-  GridBase *grid=rhs.Grid();
+  GridBase *grid=rhs._grid;
   const int Nsimd = grid->Nsimd();
   typedef typename vobj::vector_type vector_type;
   typedef typename vobj::scalar_object scalar_object;
@@ -193,21 +193,21 @@ template<class vobj> void  Cshift_comms_simd(Lattice<vobj> &ret,const Lattice<vo
   // Simd direction uses an extract/merge pair
   ///////////////////////////////////////////////
   int buffer_size = grid->_slice_nblock[dimension]*grid->_slice_block[dimension];
-  //  int words = sizeof(vobj)/sizeof(vector_type);
+  int words = sizeof(vobj)/sizeof(vector_type);
 
   std::vector<commVector<scalar_object> >   send_buf_extract(Nsimd,commVector<scalar_object>(buffer_size) );
   std::vector<commVector<scalar_object> >   recv_buf_extract(Nsimd,commVector<scalar_object>(buffer_size) );
 
   int bytes = buffer_size*sizeof(scalar_object);
 
-  ExtractPointerArray<scalar_object>  pointers(Nsimd); // 
-  ExtractPointerArray<scalar_object> rpointers(Nsimd); // received pointers
+  std::vector<scalar_object *>  pointers(Nsimd); // 
+  std::vector<scalar_object *> rpointers(Nsimd); // received pointers
 
   ///////////////////////////////////////////
   // Work out what to send where
   ///////////////////////////////////////////
   int cb    = (cbmask==0x2)? Odd : Even;
-  int sshift= grid->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,cb);
+  int sshift= grid->CheckerBoardShiftForCB(rhs.checkerboard,dimension,shift,cb);
 
   // loop over outer coord planes orthog to dim
   for(int x=0;x<rd;x++){       
@@ -257,8 +257,6 @@ template<class vobj> void  Cshift_comms_simd(Lattice<vobj> &ret,const Lattice<vo
     Scatter_plane_merge(ret,rpointers,dimension,x,cbmask);
   }
 
+ }
 }
-
-NAMESPACE_END(Grid); 
-
 #endif

Grid/cshift/Cshift_none.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,18 +23,17 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef _GRID_CSHIFT_NONE_H_
 #define _GRID_CSHIFT_NONE_H_
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 template<class vobj> Lattice<vobj> Cshift(const Lattice<vobj> &rhs,int dimension,int shift)
 {
-  Lattice<vobj> ret(rhs.Grid());
-  ret.Checkerboard() = rhs.Grid()->CheckerBoardDestination(rhs.Checkerboard(),shift,dimension);
+  Lattice<vobj> ret(rhs._grid);
+  ret.checkerboard = rhs._grid->CheckerBoardDestination(rhs.checkerboard,shift,dimension);
   Cshift_local(ret,rhs,dimension,shift);
   return ret;
 }
-NAMESPACE_END(Grid);
-
+}
 #endif

Grid/json/json.hpp

@@ -1,4 +1,3 @@
-#ifndef __NVCC__
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++
@@ -18919,4 +18918,3 @@ inline nlohmann::json::json_pointer operator "" _json_pointer(const char* s, std
 
 
 #endif
-#endif

Grid/lattice/Lattice.h

@@ -25,22 +25,9 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     See the full license in the file "LICENSE" in the top level distribution directory
     *************************************************************************************/
     /*  END LEGAL */
-#pragma once
+#ifndef GRID_LATTICE_H
+#define GRID_LATTICE_H
+
 #include <Grid/lattice/Lattice_base.h>
-#include <Grid/lattice/Lattice_conformable.h>
-#include <Grid/lattice/Lattice_ET.h>
-#include <Grid/lattice/Lattice_arith.h>
-#include <Grid/lattice/Lattice_trace.h>
-#include <Grid/lattice/Lattice_transpose.h>
-#include <Grid/lattice/Lattice_local.h>
-#include <Grid/lattice/Lattice_reduction.h>
-#include <Grid/lattice/Lattice_peekpoke.h>
-//#include <Grid/lattice/Lattice_reality.h>
-#include <Grid/lattice/Lattice_comparison_utils.h>
-#include <Grid/lattice/Lattice_comparison.h>
-#include <Grid/lattice/Lattice_coordinate.h>
-//#include <Grid/lattice/Lattice_where.h>
-#include <Grid/lattice/Lattice_rng.h>
-#include <Grid/lattice/Lattice_unary.h>
-#include <Grid/lattice/Lattice_transfer.h>
-#include <Grid/lattice/Lattice_basis.h>
+
+#endif

Grid/lattice/Lattice_ET.h

@@ -9,7 +9,6 @@ Copyright (C) 2015
 Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
 Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 Author: neo <cossu@post.kek.jp>
-Author: Christoph Lehner <christoph@lhnr.de
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -28,7 +27,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 See the full license in the file "LICENSE" in the top level distribution
 directory
 *************************************************************************************/
-			   /*  END LEGAL */
+/*  END LEGAL */
 #ifndef GRID_LATTICE_ET_H
 #define GRID_LATTICE_ET_H
 
@@ -37,13 +36,13 @@ directory
 #include <typeinfo>
 #include <vector>
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 ////////////////////////////////////////////////////
 // Predicated where support
 ////////////////////////////////////////////////////
 template <class iobj, class vobj, class robj>
-accelerator_inline vobj predicatedWhere(const iobj &predicate, const vobj &iftrue,
+inline vobj predicatedWhere(const iobj &predicate, const vobj &iftrue,
                             const robj &iffalse) {
   typename std::remove_const<vobj>::type ret;
 
@@ -52,10 +51,11 @@ accelerator_inline vobj predicatedWhere(const iobj &predicate, const vobj &iftru
   typedef typename vobj::vector_type vector_type;
 
   const int Nsimd = vobj::vector_type::Nsimd();
+  const int words = sizeof(vobj) / sizeof(vector_type);
 
-  ExtractBuffer<Integer> mask(Nsimd);
-  ExtractBuffer<scalar_object> truevals(Nsimd);
-  ExtractBuffer<scalar_object> falsevals(Nsimd);
+  std::vector<Integer> mask(Nsimd);
+  std::vector<scalar_object> truevals(Nsimd);
+  std::vector<scalar_object> falsevals(Nsimd);
 
   extract(iftrue, truevals);
   extract(iffalse, falsevals);
@@ -69,148 +69,158 @@ accelerator_inline vobj predicatedWhere(const iobj &predicate, const vobj &iftru
   return ret;
 }
 
-/////////////////////////////////////////////////////
+////////////////////////////////////////////
+// recursive evaluation of expressions; Could
+// switch to generic approach with variadics, a la
+// Antonin's Lat Sim but the repack to variadic with popped
+// from tuple is hideous; C++14 introduces std::make_index_sequence for this
+////////////////////////////////////////////
+
+// leaf eval of lattice ; should enable if protect using traits
+
+template <typename T>
+using is_lattice = std::is_base_of<LatticeBase, T>;
+
+template <typename T>
+using is_lattice_expr = std::is_base_of<LatticeExpressionBase, T>;
+
+template <typename T> using is_lattice_expr = std::is_base_of<LatticeExpressionBase,T >;
+
 //Specialization of getVectorType for lattices
-/////////////////////////////////////////////////////
 template<typename T>
 struct getVectorType<Lattice<T> >{
   typedef typename Lattice<T>::vector_object type;
 };
-
-////////////////////////////////////////////
-//--  recursive evaluation of expressions; --
-// handle leaves of syntax tree
-///////////////////////////////////////////////////
-template<class sobj> accelerator_inline 
-sobj eval(const uint64_t ss, const sobj &arg)
+ 
+template<class sobj>
+inline sobj eval(const unsigned int ss, const sobj &arg)
 {
   return arg;
 }
-
-template <class lobj> accelerator_inline 
-const lobj & eval(const uint64_t ss, const LatticeView<lobj> &arg) 
-{
-  return arg[ss];
-}
-template <class lobj> accelerator_inline 
-const lobj & eval(const uint64_t ss, const Lattice<lobj> &arg) 
-{
-  auto view = arg.AcceleratorView(ViewRead);
-  return view[ss];
+template <class lobj>
+inline const lobj &eval(const unsigned int ss, const Lattice<lobj> &arg) {
+  return arg._odata[ss];
 }
 
-///////////////////////////////////////////////////
-// handle nodes in syntax tree- eval one operand
-///////////////////////////////////////////////////
-template <typename Op, typename T1> accelerator_inline 
-auto eval(const uint64_t ss, const LatticeUnaryExpression<Op, T1> &expr)  
-  -> decltype(expr.op.func( eval(ss, expr.arg1)))
-{
-  return expr.op.func( eval(ss, expr.arg1) );
+// handle nodes in syntax tree
+template <typename Op, typename T1>
+auto inline eval(
+    const unsigned int ss,
+    const LatticeUnaryExpression<Op, T1> &expr)  // eval one operand
+    -> decltype(expr.first.func(eval(ss, std::get<0>(expr.second)))) {
+  return expr.first.func(eval(ss, std::get<0>(expr.second)));
 }
-///////////////////////
-// eval two operands
-///////////////////////
-template <typename Op, typename T1, typename T2> accelerator_inline
-auto eval(const uint64_t ss, const LatticeBinaryExpression<Op, T1, T2> &expr)  
-  -> decltype(expr.op.func( eval(ss,expr.arg1),eval(ss,expr.arg2)))
-{
-  return expr.op.func( eval(ss,expr.arg1), eval(ss,expr.arg2) );
+
+template <typename Op, typename T1, typename T2>
+auto inline eval(
+    const unsigned int ss,
+    const LatticeBinaryExpression<Op, T1, T2> &expr)  // eval two operands
+    -> decltype(expr.first.func(eval(ss, std::get<0>(expr.second)),
+                                eval(ss, std::get<1>(expr.second)))) {
+  return expr.first.func(eval(ss, std::get<0>(expr.second)),
+                         eval(ss, std::get<1>(expr.second)));
 }
-///////////////////////
-// eval three operands
-///////////////////////
-template <typename Op, typename T1, typename T2, typename T3> accelerator_inline
-auto eval(const uint64_t ss, const LatticeTrinaryExpression<Op, T1, T2, T3> &expr)  
-  -> decltype(expr.op.func(eval(ss, expr.arg1), eval(ss, expr.arg2), eval(ss, expr.arg3)))
-{
-  return expr.op.func(eval(ss, expr.arg1), eval(ss, expr.arg2), eval(ss, expr.arg3));
+
+template <typename Op, typename T1, typename T2, typename T3>
+auto inline eval(const unsigned int ss,
+                 const LatticeTrinaryExpression<Op, T1, T2, T3>
+                     &expr)  // eval three operands
+    -> decltype(expr.first.func(eval(ss, std::get<0>(expr.second)),
+                                eval(ss, std::get<1>(expr.second)),
+                                eval(ss, std::get<2>(expr.second)))) {
+  return expr.first.func(eval(ss, std::get<0>(expr.second)),
+                         eval(ss, std::get<1>(expr.second)),
+                         eval(ss, std::get<2>(expr.second)));
 }
 
 //////////////////////////////////////////////////////////////////////////
 // Obtain the grid from an expression, ensuring conformable. This must follow a
-// tree recursion; must retain grid pointer in the LatticeView class which sucks
-// Use a different method, and make it void *.
-// Perhaps a conformable method.
+// tree recursion
 //////////////////////////////////////////////////////////////////////////
-template <class T1,typename std::enable_if<is_lattice<T1>::value, T1>::type * = nullptr>
-accelerator_inline void GridFromExpression(GridBase *&grid, const T1 &lat)  // Lattice leaf
+template <class T1,
+          typename std::enable_if<is_lattice<T1>::value, T1>::type * = nullptr>
+inline void GridFromExpression(GridBase *&grid, const T1 &lat)  // Lattice leaf
 {
-  lat.Conformable(grid);
+  if (grid) {
+    conformable(grid, lat._grid);
+  }
+  grid = lat._grid;
 }
-
-template <class T1,typename std::enable_if<!is_lattice<T1>::value, T1>::type * = nullptr>
-accelerator_inline 
-void GridFromExpression(GridBase *&grid,const T1 &notlat)  // non-lattice leaf
+template <class T1,
+          typename std::enable_if<!is_lattice<T1>::value, T1>::type * = nullptr>
+inline void GridFromExpression(GridBase *&grid,
+                               const T1 &notlat)  // non-lattice leaf
 {}
-
 template <typename Op, typename T1>
-accelerator_inline 
-void GridFromExpression(GridBase *&grid,const LatticeUnaryExpression<Op, T1> &expr) 
-{
-  GridFromExpression(grid, expr.arg1);  // recurse
+inline void GridFromExpression(GridBase *&grid,
+                               const LatticeUnaryExpression<Op, T1> &expr) {
+  GridFromExpression(grid, std::get<0>(expr.second));  // recurse
 }
 
 template <typename Op, typename T1, typename T2>
-accelerator_inline 
-void GridFromExpression(GridBase *&grid, const LatticeBinaryExpression<Op, T1, T2> &expr) 
-{
-  GridFromExpression(grid, expr.arg1);  // recurse
-  GridFromExpression(grid, expr.arg2);
+inline void GridFromExpression(
+    GridBase *&grid, const LatticeBinaryExpression<Op, T1, T2> &expr) {
+  GridFromExpression(grid, std::get<0>(expr.second));  // recurse
+  GridFromExpression(grid, std::get<1>(expr.second));
 }
 template <typename Op, typename T1, typename T2, typename T3>
-accelerator_inline 
-void GridFromExpression(GridBase *&grid, const LatticeTrinaryExpression<Op, T1, T2, T3> &expr) 
-{
-  GridFromExpression(grid, expr.arg1);  // recurse
-  GridFromExpression(grid, expr.arg2);  // recurse
-  GridFromExpression(grid, expr.arg3);  // recurse
+inline void GridFromExpression(
+    GridBase *&grid, const LatticeTrinaryExpression<Op, T1, T2, T3> &expr) {
+  GridFromExpression(grid, std::get<0>(expr.second));  // recurse
+  GridFromExpression(grid, std::get<1>(expr.second));
+  GridFromExpression(grid, std::get<2>(expr.second));
 }
 
 //////////////////////////////////////////////////////////////////////////
 // Obtain the CB from an expression, ensuring conformable. This must follow a
 // tree recursion
 //////////////////////////////////////////////////////////////////////////
-template <class T1,typename std::enable_if<is_lattice<T1>::value, T1>::type * = nullptr>
+template <class T1,
+          typename std::enable_if<is_lattice<T1>::value, T1>::type * = nullptr>
 inline void CBFromExpression(int &cb, const T1 &lat)  // Lattice leaf
 {
   if ((cb == Odd) || (cb == Even)) {
-    assert(cb == lat.Checkerboard());
+    assert(cb == lat.checkerboard);
   }
-  cb = lat.Checkerboard();
+  cb = lat.checkerboard;
+  //  std::cout<<GridLogMessage<<"Lattice leaf cb "<<cb<<std::endl;
 }
-template <class T1,typename std::enable_if<!is_lattice<T1>::value, T1>::type * = nullptr>
+template <class T1,
+          typename std::enable_if<!is_lattice<T1>::value, T1>::type * = nullptr>
 inline void CBFromExpression(int &cb, const T1 &notlat)  // non-lattice leaf
 {
+  //  std::cout<<GridLogMessage<<"Non lattice leaf cb"<<cb<<std::endl;
+}
+template <typename Op, typename T1>
+inline void CBFromExpression(int &cb,
+                             const LatticeUnaryExpression<Op, T1> &expr) {
+  CBFromExpression(cb, std::get<0>(expr.second));  // recurse
+  //  std::cout<<GridLogMessage<<"Unary node cb "<<cb<<std::endl;
 }
 
-template <typename Op, typename T1> inline 
-void CBFromExpression(int &cb,const LatticeUnaryExpression<Op, T1> &expr) 
-{
-  CBFromExpression(cb, expr.arg1);  // recurse AST
-}
-
-template <typename Op, typename T1, typename T2> inline 
-void CBFromExpression(int &cb,const LatticeBinaryExpression<Op, T1, T2> &expr) 
-{
-  CBFromExpression(cb, expr.arg1);  // recurse AST
-  CBFromExpression(cb, expr.arg2);  // recurse AST
+template <typename Op, typename T1, typename T2>
+inline void CBFromExpression(int &cb,
+                             const LatticeBinaryExpression<Op, T1, T2> &expr) {
+  CBFromExpression(cb, std::get<0>(expr.second));  // recurse
+  CBFromExpression(cb, std::get<1>(expr.second));
+  //  std::cout<<GridLogMessage<<"Binary node cb "<<cb<<std::endl;
 }
 template <typename Op, typename T1, typename T2, typename T3>
-inline void CBFromExpression(int &cb, const LatticeTrinaryExpression<Op, T1, T2, T3> &expr) 
-{
-  CBFromExpression(cb, expr.arg1);  // recurse AST
-  CBFromExpression(cb, expr.arg2);  // recurse AST
-  CBFromExpression(cb, expr.arg3);  // recurse AST
+inline void CBFromExpression(
+    int &cb, const LatticeTrinaryExpression<Op, T1, T2, T3> &expr) {
+  CBFromExpression(cb, std::get<0>(expr.second));  // recurse
+  CBFromExpression(cb, std::get<1>(expr.second));
+  CBFromExpression(cb, std::get<2>(expr.second));
+  //  std::cout<<GridLogMessage<<"Trinary node cb "<<cb<<std::endl;
 }
 
 ////////////////////////////////////////////
 // Unary operators and funcs
 ////////////////////////////////////////////
-#define GridUnopClass(name, ret)					\
-  template <class arg>							\
-  struct name {								\
-    static auto accelerator_inline func(const arg a) -> decltype(ret) { return ret; } \
+#define GridUnopClass(name, ret)                                          \
+  template <class arg>                                                    \
+  struct name {                                                           \
+    static auto inline func(const arg a) -> decltype(ret) { return ret; } \
   };
 
 GridUnopClass(UnarySub, -a);
@@ -240,21 +250,19 @@ GridUnopClass(UnaryExp, exp(a));
 ////////////////////////////////////////////
 // Binary operators
 ////////////////////////////////////////////
-#define GridBinOpClass(name, combination)			\
-  template <class left, class right>				\
-  struct name {							\
-    static auto accelerator_inline				\
-    func(const left &lhs, const right &rhs)			\
-      -> decltype(combination) const				\
-    {								\
-      return combination;					\
-    }								\
-  };
-
+#define GridBinOpClass(name, combination)                      \
+  template <class left, class right>                           \
+  struct name {                                                \
+    static auto inline func(const left &lhs, const right &rhs) \
+        -> decltype(combination) const {                       \
+      return combination;                                      \
+    }                                                          \
+  }
 GridBinOpClass(BinaryAdd, lhs + rhs);
 GridBinOpClass(BinarySub, lhs - rhs);
 GridBinOpClass(BinaryMul, lhs *rhs);
 GridBinOpClass(BinaryDiv, lhs /rhs);
+
 GridBinOpClass(BinaryAnd, lhs &rhs);
 GridBinOpClass(BinaryOr, lhs | rhs);
 GridBinOpClass(BinaryAndAnd, lhs &&rhs);
@@ -263,71 +271,92 @@ GridBinOpClass(BinaryOrOr, lhs || rhs);
 ////////////////////////////////////////////////////
 // Trinary conditional op
 ////////////////////////////////////////////////////
-#define GridTrinOpClass(name, combination)				\
-  template <class predicate, class left, class right>			\
-  struct name {								\
-    static auto accelerator_inline					\
-    func(const predicate &pred, const left &lhs, const right &rhs)	\
-      -> decltype(combination) const					\
-    {									\
-      return combination;						\
-    }									\
-  };
+#define GridTrinOpClass(name, combination)                                     \
+  template <class predicate, class left, class right>                          \
+  struct name {                                                                \
+    static auto inline func(const predicate &pred, const left &lhs,            \
+                            const right &rhs) -> decltype(combination) const { \
+      return combination;                                                      \
+    }                                                                          \
+  }
 
-GridTrinOpClass(TrinaryWhere,
-		(predicatedWhere<predicate, 
-		 typename std::remove_reference<left>::type,
-		 typename std::remove_reference<right>::type>(pred, lhs,rhs)));
+GridTrinOpClass(
+    TrinaryWhere,
+    (predicatedWhere<predicate, typename std::remove_reference<left>::type,
+                     typename std::remove_reference<right>::type>(pred, lhs,
+                                                                  rhs)));
 
 ////////////////////////////////////////////
 // Operator syntactical glue
 ////////////////////////////////////////////
 
-#define GRID_UNOP(name)   name<decltype(eval(0, arg))>
-#define GRID_BINOP(name)  name<decltype(eval(0, lhs)), decltype(eval(0, rhs))>
-#define GRID_TRINOP(name) name<decltype(eval(0, pred)), decltype(eval(0, lhs)), decltype(eval(0, rhs))>
+#define GRID_UNOP(name) name<decltype(eval(0, arg))>
+#define GRID_BINOP(name) name<decltype(eval(0, lhs)), decltype(eval(0, rhs))>
+#define GRID_TRINOP(name) \
+  name<decltype(eval(0, pred)), decltype(eval(0, lhs)), decltype(eval(0, rhs))>
 
-#define GRID_DEF_UNOP(op, name)						\
-  template <typename T1, typename std::enable_if<is_lattice<T1>::value||is_lattice_expr<T1>::value,T1>::type * = nullptr> \
-  inline auto op(const T1 &arg) ->decltype(LatticeUnaryExpression<GRID_UNOP(name),T1>(GRID_UNOP(name)(), arg)) \
-  {									\
-    return     LatticeUnaryExpression<GRID_UNOP(name),T1>(GRID_UNOP(name)(), arg); \
+#define GRID_DEF_UNOP(op, name)                                             \
+  template <typename T1,                                                    \
+            typename std::enable_if<is_lattice<T1>::value ||                \
+                                        is_lattice_expr<T1>::value,         \
+                                    T1>::type * = nullptr>                  \
+  inline auto op(const T1 &arg)                                             \
+      ->decltype(LatticeUnaryExpression<GRID_UNOP(name), const T1 &>(       \
+          std::make_pair(GRID_UNOP(name)(), std::forward_as_tuple(arg)))) { \
+    return LatticeUnaryExpression<GRID_UNOP(name), const T1 &>(             \
+        std::make_pair(GRID_UNOP(name)(), std::forward_as_tuple(arg)));     \
   }
 
-#define GRID_BINOP_LEFT(op, name)					\
-  template <typename T1, typename T2,					\
-            typename std::enable_if<is_lattice<T1>::value||is_lattice_expr<T1>::value,T1>::type * = nullptr> \
-  inline auto op(const T1 &lhs, const T2 &rhs)				\
-    ->decltype(LatticeBinaryExpression<GRID_BINOP(name),T1,T2>(GRID_BINOP(name)(),lhs,rhs)) \
-  {									\
-    return     LatticeBinaryExpression<GRID_BINOP(name),T1,T2>(GRID_BINOP(name)(),lhs,rhs);\
+#define GRID_BINOP_LEFT(op, name)                                             \
+  template <typename T1, typename T2,                                         \
+            typename std::enable_if<is_lattice<T1>::value ||                  \
+                                        is_lattice_expr<T1>::value,           \
+                                    T1>::type * = nullptr>                    \
+  inline auto op(const T1 &lhs, const T2 &rhs)                                \
+      ->decltype(                                                             \
+          LatticeBinaryExpression<GRID_BINOP(name), const T1 &, const T2 &>(  \
+              std::make_pair(GRID_BINOP(name)(),                              \
+                             std::forward_as_tuple(lhs, rhs)))) {             \
+    return LatticeBinaryExpression<GRID_BINOP(name), const T1 &, const T2 &>( \
+        std::make_pair(GRID_BINOP(name)(), std::forward_as_tuple(lhs, rhs))); \
   }
 
-#define GRID_BINOP_RIGHT(op, name)					\
-  template <typename T1, typename T2,					\
-            typename std::enable_if<!is_lattice<T1>::value&&!is_lattice_expr<T1>::value,T1>::type * = nullptr, \
-            typename std::enable_if< is_lattice<T2>::value|| is_lattice_expr<T2>::value,T2>::type * = nullptr> \
-  inline auto op(const T1 &lhs, const T2 &rhs)				\
-    ->decltype(LatticeBinaryExpression<GRID_BINOP(name),T1,T2>(GRID_BINOP(name)(),lhs, rhs)) \
-  {									\
-    return     LatticeBinaryExpression<GRID_BINOP(name),T1,T2>(GRID_BINOP(name)(),lhs, rhs); \
+#define GRID_BINOP_RIGHT(op, name)                                            \
+  template <typename T1, typename T2,                                         \
+            typename std::enable_if<!is_lattice<T1>::value &&                 \
+                                        !is_lattice_expr<T1>::value,          \
+                                    T1>::type * = nullptr,                    \
+            typename std::enable_if<is_lattice<T2>::value ||                  \
+                                        is_lattice_expr<T2>::value,           \
+                                    T2>::type * = nullptr>                    \
+  inline auto op(const T1 &lhs, const T2 &rhs)                                \
+      ->decltype(                                                             \
+          LatticeBinaryExpression<GRID_BINOP(name), const T1 &, const T2 &>(  \
+              std::make_pair(GRID_BINOP(name)(),                              \
+                             std::forward_as_tuple(lhs, rhs)))) {             \
+    return LatticeBinaryExpression<GRID_BINOP(name), const T1 &, const T2 &>( \
+        std::make_pair(GRID_BINOP(name)(), std::forward_as_tuple(lhs, rhs))); \
   }
 
-#define GRID_DEF_BINOP(op, name)		\
-  GRID_BINOP_LEFT(op, name);			\
+#define GRID_DEF_BINOP(op, name) \
+  GRID_BINOP_LEFT(op, name);     \
   GRID_BINOP_RIGHT(op, name);
 
-#define GRID_DEF_TRINOP(op, name)					\
-  template <typename T1, typename T2, typename T3>			\
-  inline auto op(const T1 &pred, const T2 &lhs, const T3 &rhs)		\
-    ->decltype(LatticeTrinaryExpression<GRID_TRINOP(name),T1,T2,T3>(GRID_TRINOP(name)(),pred, lhs, rhs)) \
-  {									\
-    return LatticeTrinaryExpression<GRID_TRINOP(name),T1,T2,T3>(GRID_TRINOP(name)(),pred, lhs, rhs); \
+#define GRID_DEF_TRINOP(op, name)                                              \
+  template <typename T1, typename T2, typename T3>                             \
+  inline auto op(const T1 &pred, const T2 &lhs, const T3 &rhs)                 \
+      ->decltype(                                                              \
+          LatticeTrinaryExpression<GRID_TRINOP(name), const T1 &, const T2 &,  \
+                                   const T3 &>(std::make_pair(                 \
+              GRID_TRINOP(name)(), std::forward_as_tuple(pred, lhs, rhs)))) {  \
+    return LatticeTrinaryExpression<GRID_TRINOP(name), const T1 &, const T2 &, \
+                                    const T3 &>(std::make_pair(                \
+        GRID_TRINOP(name)(), std::forward_as_tuple(pred, lhs, rhs)));          \
   }
-
 ////////////////////////
 // Operator definitions
 ////////////////////////
+
 GRID_DEF_UNOP(operator-, UnarySub);
 GRID_DEF_UNOP(Not, UnaryNot);
 GRID_DEF_UNOP(operator!, UnaryNot);
@@ -371,27 +400,29 @@ GRID_DEF_TRINOP(where, TrinaryWhere);
 /////////////////////////////////////////////////////////////
 template <class Op, class T1>
 auto closure(const LatticeUnaryExpression<Op, T1> &expr)
-  -> Lattice<decltype(expr.op.func(eval(0, expr.arg1)))> 
-{
-  Lattice<decltype(expr.op.func(eval(0, expr.arg1)))> ret(expr);
+    -> Lattice<decltype(expr.first.func(eval(0, std::get<0>(expr.second))))> {
+  Lattice<decltype(expr.first.func(eval(0, std::get<0>(expr.second))))> ret(
+      expr);
   return ret;
 }
 template <class Op, class T1, class T2>
 auto closure(const LatticeBinaryExpression<Op, T1, T2> &expr)
-  -> Lattice<decltype(expr.op.func(eval(0, expr.arg1),eval(0, expr.arg2)))> 
-{
-  Lattice<decltype(expr.op.func(eval(0, expr.arg1),eval(0, expr.arg2)))> ret(expr);
+    -> Lattice<decltype(expr.first.func(eval(0, std::get<0>(expr.second)),
+                                        eval(0, std::get<1>(expr.second))))> {
+  Lattice<decltype(expr.first.func(eval(0, std::get<0>(expr.second)),
+                                   eval(0, std::get<1>(expr.second))))>
+      ret(expr);
   return ret;
 }
 template <class Op, class T1, class T2, class T3>
 auto closure(const LatticeTrinaryExpression<Op, T1, T2, T3> &expr)
-  -> Lattice<decltype(expr.op.func(eval(0, expr.arg1),
-				   eval(0, expr.arg2),
-				   eval(0, expr.arg3)))> 
-{
-  Lattice<decltype(expr.op.func(eval(0, expr.arg1),
-				eval(0, expr.arg2),
-				eval(0, expr.arg3)))>  ret(expr);
+    -> Lattice<decltype(expr.first.func(eval(0, std::get<0>(expr.second)),
+                                        eval(0, std::get<1>(expr.second)),
+                                        eval(0, std::get<2>(expr.second))))> {
+  Lattice<decltype(expr.first.func(eval(0, std::get<0>(expr.second)),
+                                   eval(0, std::get<1>(expr.second)),
+                                   eval(0, std::get<2>(expr.second))))>
+      ret(expr);
   return ret;
 }
 
@@ -402,7 +433,34 @@ auto closure(const LatticeTrinaryExpression<Op, T1, T2, T3> &expr)
 #undef GRID_DEF_UNOP
 #undef GRID_DEF_BINOP
 #undef GRID_DEF_TRINOP
+}
 
-NAMESPACE_END(Grid);
+#if 0
+using namespace Grid;
+        
+ int main(int argc,char **argv){
+   
+   Lattice<double> v1(16);
+   Lattice<double> v2(16);
+   Lattice<double> v3(16);
+
+   BinaryAdd<double,double> tmp;
+   LatticeBinaryExpression<BinaryAdd<double,double>,Lattice<double> &,Lattice<double> &> 
+     expr(std::make_pair(tmp,
+    std::forward_as_tuple(v1,v2)));
+   tmp.func(eval(0,v1),eval(0,v2));
+
+   auto var = v1+v2;
+   std::cout<<GridLogMessage<<typeid(var).name()<<std::endl;
+
+   v3=v1+v2;
+   v3=v1+v2+v1*v2;
+ };
+
+void testit(Lattice<double> &v1,Lattice<double> &v2,Lattice<double> &v3)
+{
+   v3=v1+v2+v1*v2;
+}
+#endif
 
 #endif

Grid/lattice/Lattice_arith.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -7,7 +7,6 @@
     Copyright (C) 2015
 
 Author: Peter Boyle <paboyle@ph.ed.ac.uk>
-Author: Christoph Lehner <christoph@lhnr.de>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -24,235 +23,233 @@ Author: Christoph Lehner <christoph@lhnr.de>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LATTICE_ARITH_H
 #define GRID_LATTICE_ARITH_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-//////////////////////////////////////////////////////////////////////////////////////////////////////
-//  avoid copy back routines for mult, mac, sub, add
-//////////////////////////////////////////////////////////////////////////////////////////////////////
-template<class obj1,class obj2,class obj3> inline
-void mult(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const Lattice<obj3> &rhs){
-  ret.Checkerboard() = lhs.Checkerboard();
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto lhs_v = lhs.AcceleratorView(ViewRead);
-  auto rhs_v = rhs.AcceleratorView(ViewRead);
-  conformable(ret,rhs);
-  conformable(lhs,rhs);
-  accelerator_for(ss,lhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto lhs_t = lhs_v(ss);
-    auto rhs_t = rhs_v(ss);
-    mult(&tmp,&lhs_t,&rhs_t);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-  
-template<class obj1,class obj2,class obj3> inline
-void mac(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const Lattice<obj3> &rhs){
-  ret.Checkerboard() = lhs.Checkerboard();
-  conformable(ret,rhs);
-  conformable(lhs,rhs);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto lhs_v = lhs.AcceleratorView(ViewRead);
-  auto rhs_v = rhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,lhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto lhs_t=lhs_v(ss);
-    auto rhs_t=rhs_v(ss);
-    mac(&tmp,&lhs_t,&rhs_t);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-  
-template<class obj1,class obj2,class obj3> inline
-void sub(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const Lattice<obj3> &rhs){
-  ret.Checkerboard() = lhs.Checkerboard();
-  conformable(ret,rhs);
-  conformable(lhs,rhs);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto lhs_v = lhs.AcceleratorView(ViewRead);
-  auto rhs_v = rhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,lhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto lhs_t=lhs_v(ss);
-    auto rhs_t=rhs_v(ss);
-    sub(&tmp,&lhs_t,&rhs_t);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-template<class obj1,class obj2,class obj3> inline
-void add(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const Lattice<obj3> &rhs){
-  ret.Checkerboard() = lhs.Checkerboard();
-  conformable(ret,rhs);
-  conformable(lhs,rhs);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto lhs_v = lhs.AcceleratorView(ViewRead);
-  auto rhs_v = rhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,lhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto lhs_t=lhs_v(ss);
-    auto rhs_t=rhs_v(ss);
-    add(&tmp,&lhs_t,&rhs_t);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-  
-//////////////////////////////////////////////////////////////////////////////////////////////////////
-//  avoid copy back routines for mult, mac, sub, add
-//////////////////////////////////////////////////////////////////////////////////////////////////////
-template<class obj1,class obj2,class obj3> inline
-void mult(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const obj3 &rhs){
-  ret.Checkerboard() = lhs.Checkerboard();
-  conformable(lhs,ret);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto lhs_v = lhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,lhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    mult(&tmp,&lhs_v(ss),&rhs);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-  
-template<class obj1,class obj2,class obj3> inline
-void mac(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const obj3 &rhs){
-  ret.Checkerboard() = lhs.Checkerboard();
-  conformable(ret,lhs);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto lhs_v = lhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,lhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto lhs_t=lhs_v(ss);
-    mac(&tmp,&lhs_t,&rhs);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-  
-template<class obj1,class obj2,class obj3> inline
-void sub(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const obj3 &rhs){
-  ret.Checkerboard() = lhs.Checkerboard();
-  conformable(ret,lhs);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto lhs_v = lhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,lhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto lhs_t=lhs_v(ss);
-    sub(&tmp,&lhs_t,&rhs);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-template<class obj1,class obj2,class obj3> inline
-void add(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const obj3 &rhs){
-  ret.Checkerboard() = lhs.Checkerboard();
-  conformable(lhs,ret);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto lhs_v = lhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,lhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto lhs_t=lhs_v(ss);
-    add(&tmp,&lhs_t,&rhs);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
 
-//////////////////////////////////////////////////////////////////////////////////////////////////////
-//  avoid copy back routines for mult, mac, sub, add
-//////////////////////////////////////////////////////////////////////////////////////////////////////
-template<class obj1,class obj2,class obj3> inline
-void mult(Lattice<obj1> &ret,const obj2 &lhs,const Lattice<obj3> &rhs){
-  ret.Checkerboard() = rhs.Checkerboard();
-  conformable(ret,rhs);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto rhs_v = lhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,rhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto rhs_t=rhs_v(ss);
-    mult(&tmp,&lhs,&rhs_t);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-  
-template<class obj1,class obj2,class obj3> inline
-void mac(Lattice<obj1> &ret,const obj2 &lhs,const Lattice<obj3> &rhs){
-  ret.Checkerboard() = rhs.Checkerboard();
-  conformable(ret,rhs);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto rhs_v = lhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,rhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto rhs_t=rhs_v(ss);
-    mac(&tmp,&lhs,&rhs_t);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-  
-template<class obj1,class obj2,class obj3> inline
-void sub(Lattice<obj1> &ret,const obj2 &lhs,const Lattice<obj3> &rhs){
-  ret.Checkerboard() = rhs.Checkerboard();
-  conformable(ret,rhs);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto rhs_v = lhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,rhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto rhs_t=rhs_v(ss);
-    sub(&tmp,&lhs,&rhs_t);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-template<class obj1,class obj2,class obj3> inline
-void add(Lattice<obj1> &ret,const obj2 &lhs,const Lattice<obj3> &rhs){
-  ret.Checkerboard() = rhs.Checkerboard();
-  conformable(ret,rhs);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto rhs_v = lhs.AcceleratorView(ViewRead);
-  accelerator_for(ss,rhs_v.size(),obj1::Nsimd(),{
-    decltype(coalescedRead(obj1())) tmp;
-    auto rhs_t=rhs_v(ss);
-    add(&tmp,&lhs,&rhs_t);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-  
-template<class sobj,class vobj> inline
-void axpy(Lattice<vobj> &ret,sobj a,const Lattice<vobj> &x,const Lattice<vobj> &y){
-  ret.Checkerboard() = x.Checkerboard();
-  conformable(ret,x);
-  conformable(x,y);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto x_v = x.AcceleratorView(ViewRead);
-  auto y_v = y.AcceleratorView(ViewRead);
-  accelerator_for(ss,x_v.size(),vobj::Nsimd(),{
-    auto tmp = a*x_v(ss)+y_v(ss);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-template<class sobj,class vobj> inline
-void axpby(Lattice<vobj> &ret,sobj a,sobj b,const Lattice<vobj> &x,const Lattice<vobj> &y){
-  ret.Checkerboard() = x.Checkerboard();
-  conformable(ret,x);
-  conformable(x,y);
-  auto ret_v = ret.AcceleratorView(ViewWrite);
-  auto x_v = x.AcceleratorView(ViewRead);
-  auto y_v = y.AcceleratorView(ViewRead);
-  accelerator_for(ss,x_v.size(),vobj::Nsimd(),{
-    auto tmp = a*x_v(ss)+b*y_v(ss);
-    coalescedWrite(ret_v[ss],tmp);
-  });
-}
-
-template<class sobj,class vobj> inline
-RealD axpy_norm(Lattice<vobj> &ret,sobj a,const Lattice<vobj> &x,const Lattice<vobj> &y)
-{
-    return axpy_norm_fast(ret,a,x,y);
-}
-template<class sobj,class vobj> inline
-RealD axpby_norm(Lattice<vobj> &ret,sobj a,sobj b,const Lattice<vobj> &x,const Lattice<vobj> &y)
-{
-    return axpby_norm_fast(ret,a,b,x,y);
-}
-
-NAMESPACE_END(Grid);
+  //////////////////////////////////////////////////////////////////////////////////////////////////////
+  //  avoid copy back routines for mult, mac, sub, add
+  //////////////////////////////////////////////////////////////////////////////////////////////////////
+  template<class obj1,class obj2,class obj3> strong_inline
+    void mult(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const Lattice<obj3> &rhs){
+    ret.checkerboard = lhs.checkerboard;
+    conformable(ret,rhs);
+    conformable(lhs,rhs);
+    parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      obj1 tmp;
+      mult(&tmp,&lhs._odata[ss],&rhs._odata[ss]);
+      vstream(ret._odata[ss],tmp);
+#else
+      mult(&ret._odata[ss],&lhs._odata[ss],&rhs._odata[ss]);
+#endif
+    }
+  }
+  
+  template<class obj1,class obj2,class obj3> strong_inline
+    void mac(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const Lattice<obj3> &rhs){
+    ret.checkerboard = lhs.checkerboard;
+    conformable(ret,rhs);
+    conformable(lhs,rhs);
+    parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      obj1 tmp;
+      mac(&tmp,&lhs._odata[ss],&rhs._odata[ss]);
+      vstream(ret._odata[ss],tmp);
+#else
+      mac(&ret._odata[ss],&lhs._odata[ss],&rhs._odata[ss]);
+#endif
+    }
+  }
+  
+  template<class obj1,class obj2,class obj3> strong_inline
+    void sub(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const Lattice<obj3> &rhs){
+    ret.checkerboard = lhs.checkerboard;
+    conformable(ret,rhs);
+    conformable(lhs,rhs);
+    parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      obj1 tmp;
+      sub(&tmp,&lhs._odata[ss],&rhs._odata[ss]);
+      vstream(ret._odata[ss],tmp);
+#else
+      sub(&ret._odata[ss],&lhs._odata[ss],&rhs._odata[ss]);
+#endif
+    }
+  }
+  template<class obj1,class obj2,class obj3> strong_inline
+    void add(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const Lattice<obj3> &rhs){
+    ret.checkerboard = lhs.checkerboard;
+    conformable(ret,rhs);
+    conformable(lhs,rhs);
+    parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      obj1 tmp;
+      add(&tmp,&lhs._odata[ss],&rhs._odata[ss]);
+      vstream(ret._odata[ss],tmp);
+#else
+      add(&ret._odata[ss],&lhs._odata[ss],&rhs._odata[ss]);
+#endif
+    }
+  }
+  
+  //////////////////////////////////////////////////////////////////////////////////////////////////////
+  //  avoid copy back routines for mult, mac, sub, add
+  //////////////////////////////////////////////////////////////////////////////////////////////////////
+  template<class obj1,class obj2,class obj3> strong_inline
+    void mult(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const obj3 &rhs){
+    ret.checkerboard = lhs.checkerboard;
+    conformable(lhs,ret);
+    parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+      obj1 tmp;
+      mult(&tmp,&lhs._odata[ss],&rhs);
+      vstream(ret._odata[ss],tmp);
+    }
+  }
+  
+  template<class obj1,class obj2,class obj3> strong_inline
+    void mac(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const obj3 &rhs){
+    ret.checkerboard = lhs.checkerboard;
+    conformable(ret,lhs);
+    parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+      obj1 tmp;
+      mac(&tmp,&lhs._odata[ss],&rhs);
+      vstream(ret._odata[ss],tmp);
+    }
+  }
+  
+  template<class obj1,class obj2,class obj3> strong_inline
+    void sub(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const obj3 &rhs){
+    ret.checkerboard = lhs.checkerboard;
+    conformable(ret,lhs);
+    parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      obj1 tmp;
+      sub(&tmp,&lhs._odata[ss],&rhs);
+      vstream(ret._odata[ss],tmp);
+#else 
+      sub(&ret._odata[ss],&lhs._odata[ss],&rhs);
+#endif
+    }
+  }
+  template<class obj1,class obj2,class obj3> strong_inline
+    void add(Lattice<obj1> &ret,const Lattice<obj2> &lhs,const obj3 &rhs){
+    ret.checkerboard = lhs.checkerboard;
+    conformable(lhs,ret);
+    parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      obj1 tmp;
+      add(&tmp,&lhs._odata[ss],&rhs);
+      vstream(ret._odata[ss],tmp);
+#else 
+      add(&ret._odata[ss],&lhs._odata[ss],&rhs);
+#endif
+    }
+  }
+
+  //////////////////////////////////////////////////////////////////////////////////////////////////////
+  //  avoid copy back routines for mult, mac, sub, add
+  //////////////////////////////////////////////////////////////////////////////////////////////////////
+    template<class obj1,class obj2,class obj3> strong_inline
+    void mult(Lattice<obj1> &ret,const obj2 &lhs,const Lattice<obj3> &rhs){
+    ret.checkerboard = rhs.checkerboard;
+    conformable(ret,rhs);
+    parallel_for(int ss=0;ss<rhs._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      obj1 tmp;
+      mult(&tmp,&lhs,&rhs._odata[ss]);
+      vstream(ret._odata[ss],tmp);
+#else 
+      mult(&ret._odata[ss],&lhs,&rhs._odata[ss]);
+#endif
+    }
+  }
+  
+  template<class obj1,class obj2,class obj3> strong_inline
+    void mac(Lattice<obj1> &ret,const obj2 &lhs,const Lattice<obj3> &rhs){
+    ret.checkerboard = rhs.checkerboard;
+    conformable(ret,rhs);
+    parallel_for(int ss=0;ss<rhs._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      obj1 tmp;
+      mac(&tmp,&lhs,&rhs._odata[ss]);
+      vstream(ret._odata[ss],tmp);
+#else 
+      mac(&ret._odata[ss],&lhs,&rhs._odata[ss]);
+#endif
+    }
+  }
+  
+  template<class obj1,class obj2,class obj3> strong_inline
+    void sub(Lattice<obj1> &ret,const obj2 &lhs,const Lattice<obj3> &rhs){
+    ret.checkerboard = rhs.checkerboard;
+    conformable(ret,rhs);
+    parallel_for(int ss=0;ss<rhs._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      obj1 tmp;
+      sub(&tmp,&lhs,&rhs._odata[ss]);
+      vstream(ret._odata[ss],tmp);
+#else 
+      sub(&ret._odata[ss],&lhs,&rhs._odata[ss]);
+#endif
+    }
+  }
+  template<class obj1,class obj2,class obj3> strong_inline
+    void add(Lattice<obj1> &ret,const obj2 &lhs,const Lattice<obj3> &rhs){
+    ret.checkerboard = rhs.checkerboard;
+    conformable(ret,rhs);
+    parallel_for(int ss=0;ss<rhs._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      obj1 tmp;
+      add(&tmp,&lhs,&rhs._odata[ss]);
+      vstream(ret._odata[ss],tmp);
+#else 
+      add(&ret._odata[ss],&lhs,&rhs._odata[ss]);
+#endif
+    }
+  }
+  
+  template<class sobj,class vobj> strong_inline
+  void axpy(Lattice<vobj> &ret,sobj a,const Lattice<vobj> &x,const Lattice<vobj> &y){
+    ret.checkerboard = x.checkerboard;
+    conformable(ret,x);
+    conformable(x,y);
+    parallel_for(int ss=0;ss<x._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      vobj tmp = a*x._odata[ss]+y._odata[ss];
+      vstream(ret._odata[ss],tmp);
+#else
+      ret._odata[ss]=a*x._odata[ss]+y._odata[ss];
+#endif
+    }
+  }
+  template<class sobj,class vobj> strong_inline
+  void axpby(Lattice<vobj> &ret,sobj a,sobj b,const Lattice<vobj> &x,const Lattice<vobj> &y){
+    ret.checkerboard = x.checkerboard;
+    conformable(ret,x);
+    conformable(x,y);
+    parallel_for(int ss=0;ss<x._grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      vobj tmp = a*x._odata[ss]+b*y._odata[ss];
+      vstream(ret._odata[ss],tmp);
+#else
+      ret._odata[ss]=a*x._odata[ss]+b*y._odata[ss];
+#endif
+    }
+  }
+
+  template<class sobj,class vobj> strong_inline
+  RealD axpy_norm(Lattice<vobj> &ret,sobj a,const Lattice<vobj> &x,const Lattice<vobj> &y){
+    return axpy_norm_fast(ret,a,x,y);
+  }
+  template<class sobj,class vobj> strong_inline
+  RealD axpby_norm(Lattice<vobj> &ret,sobj a,sobj b,const Lattice<vobj> &x,const Lattice<vobj> &y){
+    return axpby_norm_fast(ret,a,b,x,y);
+  }
+
+}
 #endif

Grid/lattice/Lattice_base.h

@@ -9,7 +9,6 @@ Copyright (C) 2015
 Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
 Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 Author: paboyle <paboyle@ph.ed.ac.uk>
-Author: Christoph Lehner <christoph@lhnr.de>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -28,507 +27,349 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 See the full license in the file "LICENSE" in the top level distribution
 directory
 *************************************************************************************/
-			   /*  END LEGAL */
-#pragma once 
+/*  END LEGAL */
+#ifndef GRID_LATTICE_BASE_H
+#define GRID_LATTICE_BASE_H
 
 #define STREAMING_STORES
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
+
+// TODO: 
+//       mac,real,imag
+
+// Functionality:
+//     -=,+=,*=,()
+//     add,+,sub,-,mult,mac,*
+//     adj,conjugate
+//     real,imag
+//     transpose,transposeIndex  
+//     trace,traceIndex
+//     peekIndex
+//     innerProduct,outerProduct,
+//     localNorm2
+//     localInnerProduct
 
 extern int GridCshiftPermuteMap[4][16];
 
-///////////////////////////////////////////////////////////////////
-// Base class which can be used by traits to pick up behaviour
-///////////////////////////////////////////////////////////////////
-class LatticeBase {};
+////////////////////////////////////////////////
+// Basic expressions used in Expression Template
+////////////////////////////////////////////////
 
-/////////////////////////////////////////////////////////////////////////////////////////
-// Conformable checks; same instance of Grid required
-/////////////////////////////////////////////////////////////////////////////////////////
-void accelerator_inline conformable(GridBase *lhs,GridBase *rhs)
+class LatticeBase
+{
+public:
+    virtual ~LatticeBase(void) = default;
+    GridBase *_grid;
+};
+    
+class LatticeExpressionBase {};
+
+template <typename Op, typename T1>                           
+class LatticeUnaryExpression  : public std::pair<Op,std::tuple<T1> > , public LatticeExpressionBase {
+ public:
+ LatticeUnaryExpression(const std::pair<Op,std::tuple<T1> > &arg): std::pair<Op,std::tuple<T1> >(arg) {};
+};
+
+template <typename Op, typename T1, typename T2>              
+class LatticeBinaryExpression : public std::pair<Op,std::tuple<T1,T2> > , public LatticeExpressionBase {
+ public:
+ LatticeBinaryExpression(const std::pair<Op,std::tuple<T1,T2> > &arg): std::pair<Op,std::tuple<T1,T2> >(arg) {};
+};
+
+template <typename Op, typename T1, typename T2, typename T3> 
+class LatticeTrinaryExpression :public std::pair<Op,std::tuple<T1,T2,T3> >, public LatticeExpressionBase {
+ public:
+ LatticeTrinaryExpression(const std::pair<Op,std::tuple<T1,T2,T3> > &arg): std::pair<Op,std::tuple<T1,T2,T3> >(arg) {};
+};
+
+void inline conformable(GridBase *lhs,GridBase *rhs)
 {
   assert(lhs == rhs);
 }
 
-////////////////////////////////////////////////////////////////////////////
-// Advise the LatticeAccelerator class
-////////////////////////////////////////////////////////////////////////////
-enum LatticeAcceleratorAdvise {
-  AdviseInfrequentUse = 0x1,    // Advise that the data is used infrequently.  This can
-                                // significantly influence performance of bulk storage.
-  AdviseReadMostly = 0x2,       // Data will mostly be read.  On some architectures
-                                // enables read-only copies of memory to be kept on
-                                // host and device.
-};
-
-////////////////////////////////////////////////////////////////////////////
-// View Access Mode
-////////////////////////////////////////////////////////////////////////////
-enum ViewMode {
-  ViewRead = 0x1,
-  ViewWrite = 0x2,
-  ViewReadWrite = 0x3
-};
-
-////////////////////////////////////////////////////////////////////////////
-// Minimal base class containing only data valid to access from accelerator
-// _odata will be a managed pointer in CUDA
-////////////////////////////////////////////////////////////////////////////
-// Force access to lattice through a view object.
-// prevents writing of code that will not offload to GPU, but perhaps annoyingly
-// strict since host could could in principle direct access through the lattice object
-// Need to decide programming model.
-#define LATTICE_VIEW_STRICT
-template<class vobj> class LatticeAccelerator : public LatticeBase
-{
-protected:
-  GridBase *_grid;
-  int checkerboard;
-  vobj     *_odata;    // A managed pointer
-  uint64_t _odata_size;    
-public:
-  accelerator_inline LatticeAccelerator() : checkerboard(0), _odata(nullptr), _odata_size(0), _grid(nullptr) { }; 
-  accelerator_inline uint64_t oSites(void) const { return _odata_size; };
-  accelerator_inline int  Checkerboard(void) const { return checkerboard; };
-  accelerator_inline int &Checkerboard(void) { return this->checkerboard; }; // can assign checkerboard on a container, not a view
-  accelerator_inline void Conformable(GridBase * &grid) const
-  { 
-    if (grid) conformable(grid, _grid);
-    else      grid = _grid;
-  };
-
-  accelerator_inline void Advise(int advise) {
-#ifdef GRID_NVCC
-#ifndef __CUDA_ARCH__ // only on host
-    if (advise & AdviseInfrequentUse) {
-      cudaMemAdvise(_odata,_odata_size*sizeof(vobj),cudaMemAdviseSetPreferredLocation,cudaCpuDeviceId);
-    }
-    if (advise & AdviseReadMostly) {
-      cudaMemAdvise(_odata,_odata_size*sizeof(vobj),cudaMemAdviseSetReadMostly,-1);
-    }
-#endif
-#endif
-  };
-
-  accelerator_inline void AcceleratorPrefetch(int accessMode = ViewReadWrite) { // will use accessMode in future
-#ifdef GRID_NVCC
-#ifndef __CUDA_ARCH__ // only on host
-    int target;
-    cudaGetDevice(&target);
-    cudaMemPrefetchAsync(_odata,_odata_size*sizeof(vobj),target);
-#endif
-#endif
-  };
-
-  accelerator_inline void HostPrefetch(int accessMode = ViewReadWrite) { // will use accessMode in future
-#ifdef GRID_NVCC
-#ifndef __CUDA_ARCH__ // only on host
-    cudaMemPrefetchAsync(_odata,_odata_size*sizeof(vobj),cudaCpuDeviceId);
-#endif
-#endif
-  };
-};
-
-/////////////////////////////////////////////////////////////////////////////////////////
-// A View class which provides accessor to the data.
-// This will be safe to call from accelerator_for and is trivially copy constructible
-// The copy constructor for this will need to be used by device lambda functions
-/////////////////////////////////////////////////////////////////////////////////////////
-template<class vobj> 
-class LatticeView : public LatticeAccelerator<vobj>
-{
-public:
-
-
-  // Rvalue
-#ifdef __CUDA_ARCH__
-  accelerator_inline const typename vobj::scalar_object operator()(size_t i) const { return coalescedRead(this->_odata[i]); }
-#else 
-  accelerator_inline const vobj & operator()(size_t i) const { return this->_odata[i]; }
-#endif
-
-  accelerator_inline const vobj & operator[](size_t i) const { return this->_odata[i]; };
-  accelerator_inline vobj       & operator[](size_t i)       { return this->_odata[i]; };
-
-  accelerator_inline uint64_t begin(void) const { return 0;};
-  accelerator_inline uint64_t end(void)   const { return this->_odata_size; };
-  accelerator_inline uint64_t size(void)  const { return this->_odata_size; };
-
-  LatticeView(const LatticeAccelerator<vobj> &refer_to_me) : LatticeAccelerator<vobj> (refer_to_me)
-  {
-  }
-};
-
-/////////////////////////////////////////////////////////////////////////////////////////
-// Lattice expression types used by ET to assemble the AST
-// 
-// Need to be able to detect code paths according to the whether a lattice object or not
-// so introduce some trait type things
-/////////////////////////////////////////////////////////////////////////////////////////
-
-class LatticeExpressionBase {};
-
-template <typename T> using is_lattice = std::is_base_of<LatticeBase, T>;
-template <typename T> using is_lattice_expr = std::is_base_of<LatticeExpressionBase,T >;
-
-template<class T, bool isLattice> struct ViewMapBase { typedef T Type; };
-template<class T>                 struct ViewMapBase<T,true> { typedef LatticeView<typename T::vector_object> Type; };
-template<class T> using ViewMap = ViewMapBase<T,std::is_base_of<LatticeBase, T>::value >;
-
-template <typename Op, typename _T1>                           
-class LatticeUnaryExpression : public  LatticeExpressionBase 
-{
-public:
-  typedef typename ViewMap<_T1>::Type T1;
-  Op op;
-  T1 arg1;
-  LatticeUnaryExpression(Op _op,const _T1 &_arg1) : op(_op), arg1(_arg1) {};
-};
-
-template <typename Op, typename _T1, typename _T2>              
-class LatticeBinaryExpression : public LatticeExpressionBase 
-{
-public:
-  typedef typename ViewMap<_T1>::Type T1;
-  typedef typename ViewMap<_T2>::Type T2;
-  Op op;
-  T1 arg1;
-  T2 arg2;
-  LatticeBinaryExpression(Op _op,const _T1 &_arg1,const _T2 &_arg2) : op(_op), arg1(_arg1), arg2(_arg2) {};
-};
-
-template <typename Op, typename _T1, typename _T2, typename _T3> 
-class LatticeTrinaryExpression : public LatticeExpressionBase 
-{
-public:
-  typedef typename ViewMap<_T1>::Type T1;
-  typedef typename ViewMap<_T2>::Type T2;
-  typedef typename ViewMap<_T3>::Type T3;
-  Op op;
-  T1 arg1;
-  T2 arg2;
-  T3 arg3;
-  LatticeTrinaryExpression(Op _op,const _T1 &_arg1,const _T2 &_arg2,const _T3 &_arg3) : op(_op), arg1(_arg1), arg2(_arg2), arg3(_arg3) {};
-};
-
-/////////////////////////////////////////////////////////////////////////////////////////
-// The real lattice class, with normal copy and assignment semantics.
-// This contains extra (host resident) grid pointer data that may be accessed by host code
-/////////////////////////////////////////////////////////////////////////////////////////
 template<class vobj>
-class Lattice : public LatticeAccelerator<vobj>
+class Lattice : public LatticeBase
 {
 public:
-  GridBase *Grid(void) const { return this->_grid; }
-  ///////////////////////////////////////////////////
-  // Member types
-  ///////////////////////////////////////////////////
-  typedef typename vobj::scalar_type scalar_type;
-  typedef typename vobj::vector_type vector_type;
-  typedef typename vobj::scalar_object scalar_object;
-  typedef vobj vector_object;
+    int checkerboard;
+    Vector<vobj> _odata;
+    
+    // to pthread need a computable loop where loop induction is not required
+    int begin(void) { return 0;};
+    int end(void)   { return _odata.size(); }
+    vobj & operator[](int i) { return _odata[i]; };
+    const vobj & operator[](int i) const { return _odata[i]; };
 
-private:
-  void dealloc(void)
-  {
-    if( this->_odata_size ) {
-      alignedAllocator<vobj> alloc;
-      alloc.deallocate(this->_odata,this->_odata_size);
-      this->_odata=nullptr;
-      this->_odata_size=0;
-    }
-  }
-  void resize(uint64_t size)
-  {
-    if ( this->_odata_size != size ) {
-      alignedAllocator<vobj> alloc;
-
-      dealloc();
-      
-      this->_odata_size = size;
-      if ( size ) 
-	this->_odata      = alloc.allocate(this->_odata_size);
-      else 
-	this->_odata      = nullptr;
-    }
-  }
 public:
-  /////////////////////////////////////////////////////////////////////////////////
-  // Return a view object that may be dereferenced in site loops.
-  // The view is trivially copy constructible and may be copied to an accelerator device
-  // in device lambdas
-  /////////////////////////////////////////////////////////////////////////////////
-  LatticeView<vobj> View (void) const // deprecated, should pick AcceleratorView for accelerator_for
-  {                                   //                     and HostView        for thread_for
-    LatticeView<vobj> accessor(*( (LatticeAccelerator<vobj> *) this));
-    return accessor;
-  }
-
-  LatticeView<vobj> AcceleratorView(int mode = ViewReadWrite) const 
-  {
-    LatticeView<vobj> accessor(*( (LatticeAccelerator<vobj> *) this));
-    accessor.AcceleratorPrefetch(mode);
-    return accessor;
-  }
-
-  LatticeView<vobj> HostView(int mode = ViewReadWrite) const 
-  {
-    LatticeView<vobj> accessor(*( (LatticeAccelerator<vobj> *) this));
-    accessor.HostPrefetch(mode);
-    return accessor;
-  }
-  
-  ~Lattice() { 
-    if ( this->_odata_size ) {
-      dealloc();
-    }
-   }
+    typedef typename vobj::scalar_type scalar_type;
+    typedef typename vobj::vector_type vector_type;
+    typedef vobj vector_object;
+   
   ////////////////////////////////////////////////////////////////////////////////
   // Expression Template closure support
   ////////////////////////////////////////////////////////////////////////////////
-  template <typename Op, typename T1> inline Lattice<vobj> & operator=(const LatticeUnaryExpression<Op,T1> &expr)
+  template <typename Op, typename T1>                         strong_inline Lattice<vobj> & operator=(const LatticeUnaryExpression<Op,T1> &expr)
   {
     GridBase *egrid(nullptr);
     GridFromExpression(egrid,expr);
     assert(egrid!=nullptr);
-    conformable(this->_grid,egrid);
+    conformable(_grid,egrid);
 
     int cb=-1;
     CBFromExpression(cb,expr);
     assert( (cb==Odd) || (cb==Even));
-    this->checkerboard=cb;
+    checkerboard=cb;
 
-    auto me  = AcceleratorView(ViewWrite);
-    accelerator_for(ss,me.size(),1,{
-      auto tmp = eval(ss,expr);
-      vstream(me[ss],tmp);
-    });
+    parallel_for(int ss=0;ss<_grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      vobj tmp = eval(ss,expr);
+      vstream(_odata[ss] ,tmp);
+#else
+      _odata[ss]=eval(ss,expr);
+#endif
+    }
     return *this;
   }
-  template <typename Op, typename T1,typename T2> inline Lattice<vobj> & operator=(const LatticeBinaryExpression<Op,T1,T2> &expr)
+  template <typename Op, typename T1,typename T2> strong_inline Lattice<vobj> & operator=(const LatticeBinaryExpression<Op,T1,T2> &expr)
   {
     GridBase *egrid(nullptr);
     GridFromExpression(egrid,expr);
     assert(egrid!=nullptr);
-    conformable(this->_grid,egrid);
+    conformable(_grid,egrid);
 
     int cb=-1;
     CBFromExpression(cb,expr);
     assert( (cb==Odd) || (cb==Even));
-    this->checkerboard=cb;
+    checkerboard=cb;
 
-    auto me  = AcceleratorView(ViewWrite);
-    accelerator_for(ss,me.size(),1,{
-      auto tmp = eval(ss,expr);
-      vstream(me[ss],tmp);
-    });
+    parallel_for(int ss=0;ss<_grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      vobj tmp = eval(ss,expr);
+      vstream(_odata[ss] ,tmp);
+#else
+      _odata[ss]=eval(ss,expr);
+#endif
+    }
     return *this;
   }
-  template <typename Op, typename T1,typename T2,typename T3> inline Lattice<vobj> & operator=(const LatticeTrinaryExpression<Op,T1,T2,T3> &expr)
+  template <typename Op, typename T1,typename T2,typename T3> strong_inline Lattice<vobj> & operator=(const LatticeTrinaryExpression<Op,T1,T2,T3> &expr)
   {
     GridBase *egrid(nullptr);
     GridFromExpression(egrid,expr);
     assert(egrid!=nullptr);
-    conformable(this->_grid,egrid);
+    conformable(_grid,egrid);
 
     int cb=-1;
     CBFromExpression(cb,expr);
     assert( (cb==Odd) || (cb==Even));
-    this->checkerboard=cb;
-    auto me  = AcceleratorView(ViewWrite);
-    accelerator_for(ss,me.size(),1,{
-      auto tmp = eval(ss,expr);
-      vstream(me[ss],tmp);
-    });
+    checkerboard=cb;
+
+    parallel_for(int ss=0;ss<_grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      //vobj tmp = eval(ss,expr);
+      vstream(_odata[ss] ,eval(ss,expr));
+#else
+      _odata[ss] = eval(ss,expr);
+#endif
+    }
     return *this;
   }
   //GridFromExpression is tricky to do
   template<class Op,class T1>
-  Lattice(const LatticeUnaryExpression<Op,T1> & expr) {
-    this->_grid = nullptr;
-    GridFromExpression(this->_grid,expr);
-    assert(this->_grid!=nullptr);
+    Lattice(const LatticeUnaryExpression<Op,T1> & expr) {
+    _grid = nullptr;
+    GridFromExpression(_grid,expr);
+    assert(_grid!=nullptr);
 
     int cb=-1;
     CBFromExpression(cb,expr);
     assert( (cb==Odd) || (cb==Even));
-    this->checkerboard=cb;
+    checkerboard=cb;
 
-    resize(this->_grid->oSites());
-
-    *this = expr;
-  }
+    _odata.resize(_grid->oSites());
+    parallel_for(int ss=0;ss<_grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      vobj tmp = eval(ss,expr);
+      vstream(_odata[ss] ,tmp);
+#else
+      _odata[ss]=eval(ss,expr);
+#endif
+    }
+  };
   template<class Op,class T1, class T2>
   Lattice(const LatticeBinaryExpression<Op,T1,T2> & expr) {
-    this->_grid = nullptr;
-    GridFromExpression(this->_grid,expr);
-    assert(this->_grid!=nullptr);
+    _grid = nullptr;
+    GridFromExpression(_grid,expr);
+    assert(_grid!=nullptr);
 
     int cb=-1;
     CBFromExpression(cb,expr);
     assert( (cb==Odd) || (cb==Even));
-    this->checkerboard=cb;
+    checkerboard=cb;
 
-    resize(this->_grid->oSites());
-
-    *this = expr;
-  }
+    _odata.resize(_grid->oSites());
+    parallel_for(int ss=0;ss<_grid->oSites();ss++){
+#ifdef STREAMING_STORES
+      vobj tmp = eval(ss,expr);
+      vstream(_odata[ss] ,tmp);
+#else
+      _odata[ss]=eval(ss,expr);
+#endif
+    }
+  };
   template<class Op,class T1, class T2, class T3>
   Lattice(const LatticeTrinaryExpression<Op,T1,T2,T3> & expr) {
-    this->_grid = nullptr;
-    GridFromExpression(this->_grid,expr);
-    assert(this->_grid!=nullptr);
+    _grid = nullptr;
+    GridFromExpression(_grid,expr);
+    assert(_grid!=nullptr);
 
     int cb=-1;
     CBFromExpression(cb,expr);
     assert( (cb==Odd) || (cb==Even));
-    this->checkerboard=cb;
+    checkerboard=cb;
 
-    resize(this->_grid->oSites());
-
-    *this = expr;
-  }
-
-  template<class sobj> inline Lattice<vobj> & operator = (const sobj & r){
-    auto me  = View();
-    thread_for(ss,me.size(),{
-      me[ss] = r;
-    });
-    return *this;
-  }
+    _odata.resize(_grid->oSites());
+    parallel_for(int ss=0;ss<_grid->oSites();ss++){
+      vstream(_odata[ss] ,eval(ss,expr));
+    }
+  };
 
   //////////////////////////////////////////////////////////////////
-  // Follow rule of five, with Constructor requires "grid" passed
-  // to user defined constructor
-  ///////////////////////////////////////////
-  // user defined constructor
-  ///////////////////////////////////////////
-  Lattice(GridBase *grid) { 
-    this->_grid = grid;
-    resize(this->_grid->oSites());
-    assert((((uint64_t)&this->_odata[0])&0xF) ==0);
-    this->checkerboard=0;
+  // Constructor requires "grid" passed.
+  // what about a default grid?
+  //////////////////////////////////////////////////////////////////
+  Lattice(GridBase *grid) : _odata(grid->oSites()) {
+    _grid = grid;
+    //        _odata.reserve(_grid->oSites());
+    //        _odata.resize(_grid->oSites());
+    //      std::cout << "Constructing lattice object with Grid pointer "<<_grid<<std::endl;
+    assert((((uint64_t)&_odata[0])&0xF) ==0);
+    checkerboard=0;
   }
   
-  //  virtual ~Lattice(void) = default;
+  Lattice(const Lattice& r){ // copy constructor
+    _grid = r._grid;
+    checkerboard = r.checkerboard;
+    _odata.resize(_grid->oSites());// essential
+    parallel_for(int ss=0;ss<_grid->oSites();ss++){
+      _odata[ss]=r._odata[ss];
+    }  	
+  }
+
+  Lattice(Lattice&& r){ // move constructor
+    _grid = r._grid;
+    checkerboard = r.checkerboard;
+    _odata=std::move(r._odata);
+  }
+  
+  inline Lattice<vobj> & operator = (Lattice<vobj> && r)
+  {
+    _grid        = r._grid;
+    checkerboard = r.checkerboard;
+    _odata       =std::move(r._odata);
+    return *this;
+  }
+
+  inline Lattice<vobj> & operator = (const Lattice<vobj> & r){
+    _grid        = r._grid;
+    checkerboard = r.checkerboard;
+    _odata.resize(_grid->oSites());// essential
+    
+    parallel_for(int ss=0;ss<_grid->oSites();ss++){
+      _odata[ss]=r._odata[ss];
+    }  	
+    return *this;
+  }
+
+  template<class robj> strong_inline Lattice<vobj> & operator = (const Lattice<robj> & r){
+    this->checkerboard = r.checkerboard;
+    conformable(*this,r);
+    
+    parallel_for(int ss=0;ss<_grid->oSites();ss++){
+      this->_odata[ss]=r._odata[ss];
+    }
+    return *this;
+  }
+
+  virtual ~Lattice(void) = default;
     
   void reset(GridBase* grid) {
-    if (this->_grid != grid) {
-      this->_grid = grid;
-      this->resize(grid->oSites());
-      this->checkerboard = 0;
+    if (_grid != grid) {
+      _grid = grid;
+      _odata.resize(grid->oSites());
+      checkerboard = 0;
     }
   }
-  ///////////////////////////////////////////
-  // copy constructor
-  ///////////////////////////////////////////
-  Lattice(const Lattice& r){ 
-    this->_grid = r.Grid();
-    resize(this->_grid->oSites());
-    *this = r;
-  }
-  ///////////////////////////////////////////
-  // move constructor
-  ///////////////////////////////////////////
-  Lattice(Lattice && r){ 
-    this->_grid = r.Grid();
-    this->_odata      = r._odata;
-    this->_odata_size = r._odata_size;
-    this->checkerboard= r.Checkerboard();
-    r._odata      = nullptr;
-    r._odata_size = 0;
-  }
-  ///////////////////////////////////////////
-  // assignment template
-  ///////////////////////////////////////////
-  template<class robj> inline Lattice<vobj> & operator = (const Lattice<robj> & r){
-    typename std::enable_if<!std::is_same<robj,vobj>::value,int>::type i=0;
-    conformable(*this,r);
-    this->checkerboard = r.Checkerboard();
-    auto me =   AcceleratorView(ViewWrite);
-    auto him= r.AcceleratorView(ViewRead);
-    accelerator_for(ss,me.size(),vobj::Nsimd(),{
-      coalescedWrite(me[ss],him(ss));
-    });
+  
+
+  template<class sobj> strong_inline Lattice<vobj> & operator = (const sobj & r){
+    parallel_for(int ss=0;ss<_grid->oSites();ss++){
+      this->_odata[ss]=r;
+    }
     return *this;
   }
-
-  ///////////////////////////////////////////
-  // Copy assignment 
-  ///////////////////////////////////////////
-  inline Lattice<vobj> & operator = (const Lattice<vobj> & r){
-    this->checkerboard = r.Checkerboard();
-    conformable(*this,r);
-    auto me =   AcceleratorView(ViewWrite);
-    auto him= r.AcceleratorView(ViewRead);
-    accelerator_for(ss,me.size(),vobj::Nsimd(),{
-      coalescedWrite(me[ss],him(ss));
-    });
-    return *this;
-  }
-  ///////////////////////////////////////////
-  // Move assignment possible if same type
-  ///////////////////////////////////////////
-  inline Lattice<vobj> & operator = (Lattice<vobj> && r){
-
-    resize(0); // deletes if appropriate
-    this->_grid       = r.Grid();
-    this->_odata      = r._odata;
-    this->_odata_size = r._odata_size;
-    this->checkerboard= r.Checkerboard();
-
-    r._odata      = nullptr;
-    r._odata_size = 0;
-    
-    return *this;
-  }
-
-  /////////////////////////////////////////////////////////////////////////////
+  
+  
   // *=,+=,-= operators inherit behvour from correspond */+/- operation
-  /////////////////////////////////////////////////////////////////////////////
-  template<class T> inline Lattice<vobj> &operator *=(const T &r) {
+  template<class T> strong_inline Lattice<vobj> &operator *=(const T &r) {
     *this = (*this)*r;
     return *this;
   }
   
-  template<class T> inline Lattice<vobj> &operator -=(const T &r) {
+  template<class T> strong_inline Lattice<vobj> &operator -=(const T &r) {
     *this = (*this)-r;
     return *this;
   }
-  template<class T> inline Lattice<vobj> &operator +=(const T &r) {
+  template<class T> strong_inline Lattice<vobj> &operator +=(const T &r) {
     *this = (*this)+r;
     return *this;
   }
-
-  friend inline void swap(Lattice &l, Lattice &r) { 
-    conformable(l,r);
-    LatticeAccelerator<vobj> tmp;
-    LatticeAccelerator<vobj> *lp = (LatticeAccelerator<vobj> *)&l;
-    LatticeAccelerator<vobj> *rp = (LatticeAccelerator<vobj> *)&r;
-    tmp = *lp;    *lp=*rp;    *rp=tmp;
-  }
-
 }; // class Lattice
-
-template<class vobj> std::ostream& operator<< (std::ostream& stream, const Lattice<vobj> &o){
-  typedef typename vobj::scalar_object sobj;
-  for(int g=0;g<o.Grid()->_gsites;g++){
-
-    Coordinate gcoor;
-    o.Grid()->GlobalIndexToGlobalCoor(g,gcoor);
-
-    sobj ss;
-    peekSite(ss,o,gcoor);
-    stream<<"[";
-    for(int d=0;d<gcoor.size();d++){
-      stream<<gcoor[d];
-      if(d!=gcoor.size()-1) stream<<",";
-    }
-    stream<<"]\t";
-    stream<<ss<<std::endl;
-  }
-  return stream;
-}
   
-NAMESPACE_END(Grid);
+  template<class vobj> std::ostream& operator<< (std::ostream& stream, const Lattice<vobj> &o){
+    std::vector<int> gcoor;
+    typedef typename vobj::scalar_object sobj;
+    sobj ss;
+    for(int g=0;g<o._grid->_gsites;g++){
+      o._grid->GlobalIndexToGlobalCoor(g,gcoor);
+      peekSite(ss,o,gcoor);
+      stream<<"[";
+      for(int d=0;d<gcoor.size();d++){
+	stream<<gcoor[d];
+	if(d!=gcoor.size()-1) stream<<",";
+      }
+      stream<<"]\t";
+      stream<<ss<<std::endl;
+    }
+    return stream;
+  }
+  
+}
 
+
+
+#include "Lattice_conformable.h"
+#define GRID_LATTICE_EXPRESSION_TEMPLATES
+#ifdef  GRID_LATTICE_EXPRESSION_TEMPLATES
+#include "Lattice_ET.h"
+#else 
+#include "Lattice_overload.h"
+#endif
+#include "Lattice_arith.h"
+#include "Lattice_trace.h"
+#include "Lattice_transpose.h"
+#include "Lattice_local.h"
+#include "Lattice_reduction.h"
+#include "Lattice_peekpoke.h"
+#include "Lattice_reality.h"
+#include "Lattice_comparison_utils.h"
+#include "Lattice_comparison.h"
+#include "Lattice_coordinate.h"
+#include "Lattice_where.h"
+#include "Lattice_rng.h"
+#include "Lattice_unary.h"
+#include "Lattice_transfer.h"
+
+
+#endif

Grid/lattice/Lattice_basis.h

@@ -1,236 +0,0 @@
-/*************************************************************************************
-
-Grid physics library, www.github.com/paboyle/Grid
-
-Source file: ./lib/lattice/Lattice_basis.h
-
-Copyright (C) 2015
-
-Author: Peter Boyle <paboyle@ph.ed.ac.uk>
-Author: paboyle <paboyle@ph.ed.ac.uk>
-Author: Christoph Lehner <christoph@lhnr.de>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-See the full license in the file "LICENSE" in the top level distribution
-directory
-*************************************************************************************/
-			   /*  END LEGAL */
-
-#pragma once
-
-NAMESPACE_BEGIN(Grid);
-
-template<class Field>
-void basisOrthogonalize(std::vector<Field> &basis,Field &w,int k) 
-{
-  // If assume basis[j] are already orthonormal,
-  // can take all inner products in parallel saving 2x bandwidth
-  // Save 3x bandwidth on the second line of loop.
-  // perhaps 2.5x speed up.
-  // 2x overall in Multigrid Lanczos  
-  for(int j=0; j<k; ++j){
-    auto ip = innerProduct(basis[j],w);
-    w = w - ip*basis[j];
-  }
-}
-
-template<class VField, class Matrix>
-void basisRotate(VField &basis,Matrix& Qt,int j0, int j1, int k0,int k1,int Nm) 
-{
-  typedef decltype(basis[0]) Field;
-  typedef decltype(basis[0].View()) View;
-  auto tmp_v = basis[0].AcceleratorView(ViewReadWrite);
-  Vector<View> basis_v(basis.size(),tmp_v);
-  typedef typename std::remove_reference<decltype(tmp_v[0])>::type vobj;
-  GridBase* grid = basis[0].Grid();
-      
-  for(int k=0;k<basis.size();k++){
-    basis_v[k] = basis[k].AcceleratorView(ViewReadWrite);
-  }
-
-#ifndef GRID_NVCC
-  thread_region
-  {
-    std::vector < vobj > B(Nm); // Thread private
-    thread_for_in_region(ss, grid->oSites(),{
-	for(int j=j0; j<j1; ++j) B[j]=0.;
-      
-	for(int j=j0; j<j1; ++j){
-	  for(int k=k0; k<k1; ++k){
-	    B[j] +=Qt(j,k) * basis_v[k][ss];
-	  }
-	}
-	for(int j=j0; j<j1; ++j){
-	  basis_v[j][ss] = B[j];
-	}
-      });
-  }
-#else
-  int nrot = j1-j0;
-  if (!nrot) // edge case not handled gracefully by Cuda
-    return;
-
-  uint64_t oSites   =grid->oSites();
-  uint64_t siteBlock=(grid->oSites()+nrot-1)/nrot; // Maximum 1 additional vector overhead
-
-  Vector <vobj> Bt(siteBlock * nrot); 
-  auto Bp=&Bt[0];
-
-  // GPU readable copy of matrix
-  Vector<double> Qt_jv(Nm*Nm);
-  double *Qt_p = & Qt_jv[0];
-  thread_for(i,Nm*Nm,{
-      int j = i/Nm;
-      int k = i%Nm;
-      Qt_p[i]=Qt(j,k);
-    });
-
-  // Block the loop to keep storage footprint down
-  for(uint64_t s=0;s<oSites;s+=siteBlock){
-
-    // remaining work in this block
-    int ssites=MIN(siteBlock,oSites-s);
-
-    // zero out the accumulators
-    accelerator_for(ss,siteBlock*nrot,vobj::Nsimd(),{
-	decltype(coalescedRead(Bp[ss])) z;
-	z=Zero();
-	coalescedWrite(Bp[ss],z);
-      });
-
-    accelerator_for(sj,ssites*nrot,vobj::Nsimd(),{
-	
-	int j =sj%nrot;
-	int jj  =j0+j;
-	int ss =sj/nrot;
-	int sss=ss+s;
-
-	for(int k=k0; k<k1; ++k){
-	  auto tmp = coalescedRead(Bp[ss*nrot+j]);
-	  coalescedWrite(Bp[ss*nrot+j],tmp+ Qt_p[jj*Nm+k] * coalescedRead(basis_v[k][sss]));
-	}
-      });
-
-    accelerator_for(sj,ssites*nrot,vobj::Nsimd(),{
-	int j =sj%nrot;
-	int jj  =j0+j;
-	int ss =sj/nrot;
-	int sss=ss+s;
-	coalescedWrite(basis_v[jj][sss],coalescedRead(Bp[ss*nrot+j]));
-      });
-  }
-#endif
-}
-
-// Extract a single rotated vector
-template<class Field>
-void basisRotateJ(Field &result,std::vector<Field> &basis,Eigen::MatrixXd& Qt,int j, int k0,int k1,int Nm) 
-{
-  typedef decltype(basis[0].AcceleratorView()) View;
-  typedef typename Field::vector_object vobj;
-  GridBase* grid = basis[0].Grid();
-
-  result.Checkerboard() = basis[0].Checkerboard();
-  auto result_v=result.AcceleratorView(ViewWrite);
-  Vector<View> basis_v(basis.size(),result_v);
-  for(int k=0;k<basis.size();k++){
-    basis_v[k] = basis[k].AcceleratorView(ViewRead);
-  }
-  vobj zz=Zero();
-  Vector<double> Qt_jv(Nm);
-  double * Qt_j = & Qt_jv[0];
-  for(int k=0;k<Nm;++k) Qt_j[k]=Qt(j,k);
-  accelerator_for(ss, grid->oSites(),vobj::Nsimd(),{
-    auto B=coalescedRead(zz);
-    for(int k=k0; k<k1; ++k){
-      B +=Qt_j[k] * coalescedRead(basis_v[k][ss]);
-    }
-    coalescedWrite(result_v[ss], B);
-  });
-}
-
-template<class Field>
-void basisReorderInPlace(std::vector<Field> &_v,std::vector<RealD>& sort_vals, std::vector<int>& idx) 
-{
-  int vlen = idx.size();
-
-  assert(vlen>=1);
-  assert(vlen<=sort_vals.size());
-  assert(vlen<=_v.size());
-
-  for (size_t i=0;i<vlen;i++) {
-
-    if (idx[i] != i) {
-
-      //////////////////////////////////////
-      // idx[i] is a table of desired sources giving a permutation.
-      // Swap v[i] with v[idx[i]].
-      // Find  j>i for which _vnew[j] = _vold[i],
-      // track the move idx[j] => idx[i]
-      // track the move idx[i] => i
-      //////////////////////////////////////
-      size_t j;
-      for (j=i;j<idx.size();j++)
-	if (idx[j]==i)
-	  break;
-
-      assert(idx[i] > i);     assert(j!=idx.size());      assert(idx[j]==i);
-
-      swap(_v[i],_v[idx[i]]); // should use vector move constructor, no data copy
-      std::swap(sort_vals[i],sort_vals[idx[i]]);
-
-      idx[j] = idx[i];
-      idx[i] = i;
-    }
-  }
-}
-
-inline std::vector<int> basisSortGetIndex(std::vector<RealD>& sort_vals) 
-{
-  std::vector<int> idx(sort_vals.size());
-  std::iota(idx.begin(), idx.end(), 0);
-
-  // sort indexes based on comparing values in v
-  std::sort(idx.begin(), idx.end(), [&sort_vals](int i1, int i2) {
-    return ::fabs(sort_vals[i1]) < ::fabs(sort_vals[i2]);
-  });
-  return idx;
-}
-
-template<class Field>
-void basisSortInPlace(std::vector<Field> & _v,std::vector<RealD>& sort_vals, bool reverse) 
-{
-  std::vector<int> idx = basisSortGetIndex(sort_vals);
-  if (reverse)
-    std::reverse(idx.begin(), idx.end());
-  
-  basisReorderInPlace(_v,sort_vals,idx);
-}
-
-// PAB: faster to compute the inner products first then fuse loops.
-// If performance critical can improve.
-template<class Field>
-void basisDeflate(const std::vector<Field> &_v,const std::vector<RealD>& eval,const Field& src_orig,Field& result) {
-  result = Zero();
-  assert(_v.size()==eval.size());
-  int N = (int)_v.size();
-  for (int i=0;i<N;i++) {
-    Field& tmp = _v[i];
-    axpy(result,TensorRemove(innerProduct(tmp,src_orig)) / eval[i],tmp,result);
-  }
-}
-
-NAMESPACE_END(Grid);

Grid/lattice/Lattice_comparison.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,184 +24,146 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LATTICE_COMPARISON_H
 #define GRID_LATTICE_COMPARISON_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-//////////////////////////////////////////////////////////////////////////
-// relational operators
-// 
-// Support <,>,<=,>=,==,!=
-//
-//Query supporting bitwise &, |, ^, !
-//Query supporting logical &&, ||, 
-//////////////////////////////////////////////////////////////////////////
+    //////////////////////////////////////////////////////////////////////////
+    // relational operators
+    // 
+    // Support <,>,<=,>=,==,!=
+    //
+    //Query supporting bitwise &, |, ^, !
+    //Query supporting logical &&, ||, 
+    //////////////////////////////////////////////////////////////////////////
 
-typedef iScalar<vInteger> vPredicate ;
-
-/*
-template <class iobj, class vobj, class robj> accelerator_inline 
-vobj predicatedWhere(const iobj &predicate, const vobj &iftrue, const robj &iffalse) 
-{
-  typename std::remove_const<vobj>::type ret;
-
-  typedef typename vobj::scalar_object scalar_object;
-  typedef typename vobj::scalar_type scalar_type;
-  typedef typename vobj::vector_type vector_type;
-
-  const int Nsimd = vobj::vector_type::Nsimd();
-
-  ExtractBuffer<Integer> mask(Nsimd);
-  ExtractBuffer<scalar_object> truevals(Nsimd);
-  ExtractBuffer<scalar_object> falsevals(Nsimd);
-
-  extract(iftrue, truevals);
-  extract(iffalse, falsevals);
-  extract<vInteger, Integer>(TensorRemove(predicate), mask);
-
-  for (int s = 0; s < Nsimd; s++) {
-    if (mask[s]) falsevals[s] = truevals[s];
+  //////////////////////////////////////////////////////////////////////////
+  // compare lattice to lattice
+  //////////////////////////////////////////////////////////////////////////
+  template<class vfunctor,class lobj,class robj>  
+    inline Lattice<vInteger> LLComparison(vfunctor op,const Lattice<lobj> &lhs,const Lattice<robj> &rhs)
+  {
+    Lattice<vInteger> ret(rhs._grid);
+    parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
+      ret._odata[ss]=op(lhs._odata[ss],rhs._odata[ss]);
+    }
+    return ret;
+  }
+  //////////////////////////////////////////////////////////////////////////
+  // compare lattice to scalar
+  //////////////////////////////////////////////////////////////////////////
+  template<class vfunctor,class lobj,class robj> 
+    inline Lattice<vInteger> LSComparison(vfunctor op,const Lattice<lobj> &lhs,const robj &rhs)
+  {
+    Lattice<vInteger> ret(lhs._grid);
+    parallel_for(int ss=0;ss<lhs._grid->oSites(); ss++){
+      ret._odata[ss]=op(lhs._odata[ss],rhs);
+    }
+    return ret;
+  }
+  //////////////////////////////////////////////////////////////////////////
+  // compare scalar to lattice
+  //////////////////////////////////////////////////////////////////////////
+  template<class vfunctor,class lobj,class robj> 
+    inline Lattice<vInteger> SLComparison(vfunctor op,const lobj &lhs,const Lattice<robj> &rhs)
+  {
+    Lattice<vInteger> ret(rhs._grid);
+    parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
+      ret._odata[ss]=op(lhs._odata[ss],rhs);
+    }
+    return ret;
   }
-
-  merge(ret, falsevals);
-  return ret;
-}
-*/
-//////////////////////////////////////////////////////////////////////////
-// compare lattice to lattice
-//////////////////////////////////////////////////////////////////////////
-
-template<class vfunctor,class lobj,class robj>  
-inline Lattice<vPredicate> LLComparison(vfunctor op,const Lattice<lobj> &lhs,const Lattice<robj> &rhs)
-{
-  Lattice<vPredicate> ret(rhs.Grid());
-  auto lhs_v = lhs.View();
-  auto rhs_v = rhs.View();
-  auto ret_v = ret.View();
-  thread_for( ss, rhs_v.size(), {
-      ret_v[ss]=op(lhs_v[ss],rhs_v[ss]);
-  });
-  return ret;
-}
-//////////////////////////////////////////////////////////////////////////
-// compare lattice to scalar
-//////////////////////////////////////////////////////////////////////////
-template<class vfunctor,class lobj,class robj> 
-inline Lattice<vPredicate> LSComparison(vfunctor op,const Lattice<lobj> &lhs,const robj &rhs)
-{
-  Lattice<vPredicate> ret(lhs.Grid());
-  auto lhs_v = lhs.View();
-  auto ret_v = ret.View();
-  thread_for( ss, lhs_v.size(), {
-    ret_v[ss]=op(lhs_v[ss],rhs);
-  });
-  return ret;
-}
-//////////////////////////////////////////////////////////////////////////
-// compare scalar to lattice
-//////////////////////////////////////////////////////////////////////////
-template<class vfunctor,class lobj,class robj> 
-inline Lattice<vPredicate> SLComparison(vfunctor op,const lobj &lhs,const Lattice<robj> &rhs)
-{
-  Lattice<vPredicate> ret(rhs.Grid());
-  auto rhs_v = rhs.View();
-  auto ret_v = ret.View();
-  thread_for( ss, rhs_v.size(), {
-    ret_v[ss]=op(lhs,rhs_v[ss]);
-  });
-  return ret;
-}
   
-//////////////////////////////////////////////////////////////////////////
-// Map to functors
-//////////////////////////////////////////////////////////////////////////
-// Less than
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator < (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
-  return LLComparison(vlt<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator < (const Lattice<lobj> & lhs, const robj & rhs) {
-  return LSComparison(vlt<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator < (const lobj & lhs, const Lattice<robj> & rhs) {
-  return SLComparison(vlt<lobj,robj>(),lhs,rhs);
-}
+  //////////////////////////////////////////////////////////////////////////
+  // Map to functors
+  //////////////////////////////////////////////////////////////////////////
+  // Less than
+  template<class lobj,class robj>
+    inline Lattice<vInteger> operator < (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
+    return LLComparison(vlt<lobj,robj>(),lhs,rhs);
+  }
+  template<class lobj,class robj>
+    inline Lattice<vInteger> operator < (const Lattice<lobj> & lhs, const robj & rhs) {
+    return LSComparison(vlt<lobj,robj>(),lhs,rhs);
+  }
+  template<class lobj,class robj>
+    inline Lattice<vInteger> operator < (const lobj & lhs, const Lattice<robj> & rhs) {
+    return SLComparison(vlt<lobj,robj>(),lhs,rhs);
+  }
   
-// Less than equal
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator <= (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
-  return LLComparison(vle<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator <= (const Lattice<lobj> & lhs, const robj & rhs) {
-  return LSComparison(vle<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator <= (const lobj & lhs, const Lattice<robj> & rhs) {
-  return SLComparison(vle<lobj,robj>(),lhs,rhs);
-}
+  // Less than equal
+  template<class lobj,class robj>
+    inline Lattice<vInteger> operator <= (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
+    return LLComparison(vle<lobj,robj>(),lhs,rhs);
+  }
+  template<class lobj,class robj>
+    inline Lattice<vInteger> operator <= (const Lattice<lobj> & lhs, const robj & rhs) {
+    return LSComparison(vle<lobj,robj>(),lhs,rhs);
+  }
+  template<class lobj,class robj>
+    inline Lattice<vInteger> operator <= (const lobj & lhs, const Lattice<robj> & rhs) {
+    return SLComparison(vle<lobj,robj>(),lhs,rhs);
+  }
   
-// Greater than 
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator > (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
-  return LLComparison(vgt<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator > (const Lattice<lobj> & lhs, const robj & rhs) {
-  return LSComparison(vgt<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator > (const lobj & lhs, const Lattice<robj> & rhs) {
-  return SLComparison(vgt<lobj,robj>(),lhs,rhs);
-}
+  // Greater than 
+  template<class lobj,class robj>
+    inline Lattice<vInteger> operator > (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
+    return LLComparison(vgt<lobj,robj>(),lhs,rhs);
+  }
+  template<class lobj,class robj>
+    inline Lattice<vInteger> operator > (const Lattice<lobj> & lhs, const robj & rhs) {
+    return LSComparison(vgt<lobj,robj>(),lhs,rhs);
+  }
+  template<class lobj,class robj>
+    inline Lattice<vInteger> operator > (const lobj & lhs, const Lattice<robj> & rhs) {
+     return SLComparison(vgt<lobj,robj>(),lhs,rhs);
+  }
   
   
-// Greater than equal
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator >= (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
-  return LLComparison(vge<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator >= (const Lattice<lobj> & lhs, const robj & rhs) {
-  return LSComparison(vge<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator >= (const lobj & lhs, const Lattice<robj> & rhs) {
-  return SLComparison(vge<lobj,robj>(),lhs,rhs);
-}
+  // Greater than equal
+   template<class lobj,class robj>
+     inline Lattice<vInteger> operator >= (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
+     return LLComparison(vge<lobj,robj>(),lhs,rhs);
+   }
+   template<class lobj,class robj>
+   inline Lattice<vInteger> operator >= (const Lattice<lobj> & lhs, const robj & rhs) {
+     return LSComparison(vge<lobj,robj>(),lhs,rhs);
+   }
+   template<class lobj,class robj>
+     inline Lattice<vInteger> operator >= (const lobj & lhs, const Lattice<robj> & rhs) {
+     return SLComparison(vge<lobj,robj>(),lhs,rhs);
+   }
    
-// equal
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator == (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
-  return LLComparison(veq<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator == (const Lattice<lobj> & lhs, const robj & rhs) {
-  return LSComparison(veq<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator == (const lobj & lhs, const Lattice<robj> & rhs) {
-  return SLComparison(veq<lobj,robj>(),lhs,rhs);
-}
+   // equal
+   template<class lobj,class robj>
+     inline Lattice<vInteger> operator == (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
+     return LLComparison(veq<lobj,robj>(),lhs,rhs);
+   }
+   template<class lobj,class robj>
+     inline Lattice<vInteger> operator == (const Lattice<lobj> & lhs, const robj & rhs) {
+     return LSComparison(veq<lobj,robj>(),lhs,rhs);
+   }
+   template<class lobj,class robj>
+     inline Lattice<vInteger> operator == (const lobj & lhs, const Lattice<robj> & rhs) {
+     return SLComparison(veq<lobj,robj>(),lhs,rhs);
+   }
    
    
-// not equal
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator != (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
-  return LLComparison(vne<lobj,robj>(),lhs,rhs);
+   // not equal
+   template<class lobj,class robj>
+     inline Lattice<vInteger> operator != (const Lattice<lobj> & lhs, const Lattice<robj> & rhs) {
+     return LLComparison(vne<lobj,robj>(),lhs,rhs);
+   }
+   template<class lobj,class robj>
+     inline Lattice<vInteger> operator != (const Lattice<lobj> & lhs, const robj & rhs) {
+     return LSComparison(vne<lobj,robj>(),lhs,rhs);
+   }
+   template<class lobj,class robj>
+     inline Lattice<vInteger> operator != (const lobj & lhs, const Lattice<robj> & rhs) {
+     return SLComparison(vne<lobj,robj>(),lhs,rhs);
+   }
 }
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator != (const Lattice<lobj> & lhs, const robj & rhs) {
-  return LSComparison(vne<lobj,robj>(),lhs,rhs);
-}
-template<class lobj,class robj>
-inline Lattice<vPredicate> operator != (const lobj & lhs, const Lattice<robj> & rhs) {
-  return SLComparison(vne<lobj,robj>(),lhs,rhs);
-}
-NAMESPACE_END(Grid);
 #endif

Grid/lattice/Lattice_comparison_utils.h

@@ -26,10 +26,10 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     See the full license in the file "LICENSE" in the top level distribution directory
     *************************************************************************************/
     /*  END LEGAL */
+#ifndef GRID_COMPARISON_H
+#define GRID_COMPARISON_H
 
-#pragma once
-
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
   /////////////////////////////////////////
   // This implementation is a bit poor.
@@ -44,42 +44,42 @@ NAMESPACE_BEGIN(Grid);
   //
   template<class lobj,class robj> class veq {
   public:
-    accelerator vInteger operator()(const lobj &lhs, const robj &rhs)
+    vInteger operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) == (rhs);
     }
   };
   template<class lobj,class robj> class vne {
   public:
-    accelerator vInteger operator()(const lobj &lhs, const robj &rhs)
+    vInteger operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) != (rhs);
     }
   };
   template<class lobj,class robj> class vlt {
   public:
-    accelerator vInteger operator()(const lobj &lhs, const robj &rhs)
+    vInteger operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) < (rhs);
     }
   };
   template<class lobj,class robj> class vle {
   public:
-    accelerator vInteger operator()(const lobj &lhs, const robj &rhs)
+    vInteger operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) <= (rhs);
     }
   };
   template<class lobj,class robj> class vgt {
   public:
-    accelerator vInteger operator()(const lobj &lhs, const robj &rhs)
+    vInteger operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) > (rhs);
     }
   };
   template<class lobj,class robj> class vge {
     public:
-    accelerator vInteger operator()(const lobj &lhs, const robj &rhs)
+    vInteger operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) >= (rhs);
     }
@@ -88,42 +88,42 @@ NAMESPACE_BEGIN(Grid);
   // Generic list of functors
   template<class lobj,class robj> class seq {
   public:
-    accelerator Integer operator()(const lobj &lhs, const robj &rhs)
+    Integer operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) == (rhs);
     }
   };
   template<class lobj,class robj> class sne {
   public:
-    accelerator Integer operator()(const lobj &lhs, const robj &rhs)
+    Integer operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) != (rhs);
     }
   };
   template<class lobj,class robj> class slt {
   public:
-    accelerator Integer operator()(const lobj &lhs, const robj &rhs)
+    Integer operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) < (rhs);
     }
   };
   template<class lobj,class robj> class sle {
   public:
-    accelerator Integer operator()(const lobj &lhs, const robj &rhs)
+    Integer operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) <= (rhs);
     }
   };
   template<class lobj,class robj> class sgt {
   public:
-    accelerator Integer operator()(const lobj &lhs, const robj &rhs)
+    Integer operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) > (rhs);
     }
   };
   template<class lobj,class robj> class sge {
   public:
-    accelerator Integer operator()(const lobj &lhs, const robj &rhs)
+    Integer operator()(const lobj &lhs, const robj &rhs)
     { 
       return (lhs) >= (rhs);
     }
@@ -133,12 +133,12 @@ NAMESPACE_BEGIN(Grid);
   // Integer and real get extra relational functions.
   //////////////////////////////////////////////////////////////////////////////////////////////////////
   template<class sfunctor, class vsimd,IfNotComplex<vsimd> = 0> 
-    accelerator_inline vInteger Comparison(sfunctor sop,const vsimd & lhs, const vsimd & rhs)
+    inline vInteger Comparison(sfunctor sop,const vsimd & lhs, const vsimd & rhs)
     {
       typedef typename vsimd::scalar_type scalar;
-      ExtractBuffer<scalar> vlhs(vsimd::Nsimd());   // Use functors to reduce this to single implementation
-      ExtractBuffer<scalar> vrhs(vsimd::Nsimd());
-      ExtractBuffer<Integer> vpred(vsimd::Nsimd());
+      std::vector<scalar> vlhs(vsimd::Nsimd());   // Use functors to reduce this to single implementation
+      std::vector<scalar> vrhs(vsimd::Nsimd());
+      std::vector<Integer> vpred(vsimd::Nsimd());
       vInteger ret;
       extract<vsimd,scalar>(lhs,vlhs);
       extract<vsimd,scalar>(rhs,vrhs);
@@ -150,11 +150,11 @@ NAMESPACE_BEGIN(Grid);
     }
 
   template<class sfunctor, class vsimd,IfNotComplex<vsimd> = 0> 
-    accelerator_inline vInteger Comparison(sfunctor sop,const vsimd & lhs, const typename vsimd::scalar_type & rhs)
+    inline vInteger Comparison(sfunctor sop,const vsimd & lhs, const typename vsimd::scalar_type & rhs)
     {
       typedef typename vsimd::scalar_type scalar;
-      ExtractBuffer<scalar> vlhs(vsimd::Nsimd());   // Use functors to reduce this to single implementation
-      ExtractBuffer<Integer> vpred(vsimd::Nsimd());
+      std::vector<scalar> vlhs(vsimd::Nsimd());   // Use functors to reduce this to single implementation
+      std::vector<Integer> vpred(vsimd::Nsimd());
       vInteger ret;
       extract<vsimd,scalar>(lhs,vlhs);
       for(int s=0;s<vsimd::Nsimd();s++){
@@ -165,11 +165,11 @@ NAMESPACE_BEGIN(Grid);
     }
 
   template<class sfunctor, class vsimd,IfNotComplex<vsimd> = 0> 
-    accelerator_inline vInteger Comparison(sfunctor sop,const typename vsimd::scalar_type & lhs, const vsimd & rhs)
+    inline vInteger Comparison(sfunctor sop,const typename vsimd::scalar_type & lhs, const vsimd & rhs)
     {
       typedef typename vsimd::scalar_type scalar;
-      ExtractBuffer<scalar> vrhs(vsimd::Nsimd());   // Use functors to reduce this to single implementation
-      ExtractBuffer<Integer> vpred(vsimd::Nsimd());
+      std::vector<scalar> vrhs(vsimd::Nsimd());   // Use functors to reduce this to single implementation
+      std::vector<Integer> vpred(vsimd::Nsimd());
       vInteger ret;
       extract<vsimd,scalar>(rhs,vrhs);
       for(int s=0;s<vsimd::Nsimd();s++){
@@ -181,30 +181,30 @@ NAMESPACE_BEGIN(Grid);
 
 #define DECLARE_RELATIONAL_EQ(op,functor) \
   template<class vsimd,IfSimd<vsimd> = 0>\
-    accelerator_inline vInteger operator op (const vsimd & lhs, const vsimd & rhs)\
+    inline vInteger operator op (const vsimd & lhs, const vsimd & rhs)\
     {\
       typedef typename vsimd::scalar_type scalar;\
       return Comparison(functor<scalar,scalar>(),lhs,rhs);\
     }\
   template<class vsimd,IfSimd<vsimd> = 0>\
-    accelerator_inline vInteger operator op (const vsimd & lhs, const typename vsimd::scalar_type & rhs) \
+    inline vInteger operator op (const vsimd & lhs, const typename vsimd::scalar_type & rhs) \
     {\
       typedef typename vsimd::scalar_type scalar;\
       return Comparison(functor<scalar,scalar>(),lhs,rhs);\
     }\
   template<class vsimd,IfSimd<vsimd> = 0>\
-    accelerator_inline vInteger operator op (const typename vsimd::scalar_type & lhs, const vsimd & rhs) \
+    inline vInteger operator op (const typename vsimd::scalar_type & lhs, const vsimd & rhs) \
     {\
       typedef typename vsimd::scalar_type scalar;\
       return Comparison(functor<scalar,scalar>(),lhs,rhs);\
     }\
   template<class vsimd>\
-    accelerator_inline vInteger operator op(const iScalar<vsimd> &lhs,const typename vsimd::scalar_type &rhs) \
+    inline vInteger operator op(const iScalar<vsimd> &lhs,const typename vsimd::scalar_type &rhs) \
     {									\
       return lhs._internal op rhs;					\
     }									\
   template<class vsimd>\
-    accelerator_inline vInteger operator op(const typename vsimd::scalar_type &lhs,const iScalar<vsimd> &rhs) \
+    inline vInteger operator op(const typename vsimd::scalar_type &lhs,const iScalar<vsimd> &rhs) \
     {									\
       return lhs op rhs._internal;					\
     }									\
@@ -212,7 +212,7 @@ NAMESPACE_BEGIN(Grid);
 #define DECLARE_RELATIONAL(op,functor) \
   DECLARE_RELATIONAL_EQ(op,functor)    \
   template<class vsimd>\
-    accelerator_inline vInteger operator op(const iScalar<vsimd> &lhs,const iScalar<vsimd> &rhs)\
+    inline vInteger operator op(const iScalar<vsimd> &lhs,const iScalar<vsimd> &rhs)\
     {									\
       return lhs._internal op rhs._internal;				\
     }									
@@ -226,7 +226,7 @@ DECLARE_RELATIONAL(!=,sne);
 
 #undef DECLARE_RELATIONAL
 
-NAMESPACE_END(Grid);
-
+}
 
 
+#endif

Grid/lattice/Lattice_conformable.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,18 +23,18 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LATTICE_CONFORMABLE_H
 #define GRID_LATTICE_CONFORMABLE_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
+
+    template<class obj1,class obj2> void conformable(const Lattice<obj1> &lhs,const Lattice<obj2> &rhs)
+    {
+        assert(lhs._grid == rhs._grid);
+        assert(lhs.checkerboard == rhs.checkerboard);
+    }
 
-template<class obj1,class obj2> void conformable(const Lattice<obj1> &lhs,const Lattice<obj2> &rhs)
-{
-  assert(lhs.Grid() == rhs.Grid());
-  assert(lhs.Checkerboard() == rhs.Checkerboard());
 }
-
-NAMESPACE_END(Grid);
 #endif

Grid/lattice/Lattice_coordinate.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,51 +23,34 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
-#pragma once 
+    *************************************************************************************/
+    /*  END LEGAL */
+#ifndef GRID_LATTICE_COORDINATE_H
+#define GRID_LATTICE_COORDINATE_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-template<class iobj> inline void LatticeCoordinate(Lattice<iobj> &l,int mu)
-{
-  typedef typename iobj::scalar_type scalar_type;
-  typedef typename iobj::vector_type vector_type;
+    template<class iobj> inline void LatticeCoordinate(Lattice<iobj> &l,int mu)
+    {
+      typedef typename iobj::scalar_type scalar_type;
+      typedef typename iobj::vector_type vector_type;
 
-  GridBase *grid = l.Grid();
-  int Nsimd = grid->iSites();
+      GridBase *grid = l._grid;
+      int Nsimd = grid->iSites();
 
-  auto l_v = l.View();
-  thread_for( o, grid->oSites(), {
-    vector_type vI;
-    Coordinate gcoor;
-    ExtractBuffer<scalar_type> mergebuf(Nsimd);
-    for(int i=0;i<grid->iSites();i++){
-      grid->RankIndexToGlobalCoor(grid->ThisRank(),o,i,gcoor);
-      mergebuf[i]=(Integer)gcoor[mu];
-    }
-    merge<vector_type,scalar_type>(vI,mergebuf);
-    l_v[o]=vI;
-  });
-};
+      std::vector<int> gcoor;
+      std::vector<scalar_type> mergebuf(Nsimd);
 
-// LatticeCoordinate();
-// FIXME for debug; deprecate this; made obscelete by 
-template<class vobj> void lex_sites(Lattice<vobj> &l){
-  auto l_v = l.View();
-  Real *v_ptr = (Real *)&l_v[0];
-  size_t o_len = l.Grid()->oSites();
-  size_t v_len = sizeof(vobj)/sizeof(vRealF);
-  size_t vec_len = vRealF::Nsimd();
-
-  for(int i=0;i<o_len;i++){
-    for(int j=0;j<v_len;j++){
-      for(int vv=0;vv<vec_len;vv+=2){
-	v_ptr[i*v_len*vec_len+j*vec_len+vv  ]= i+vv*500;
-	v_ptr[i*v_len*vec_len+j*vec_len+vv+1]= i+vv*500;
+      vector_type vI;
+      for(int o=0;o<grid->oSites();o++){
+	for(int i=0;i<grid->iSites();i++){
+	  grid->RankIndexToGlobalCoor(grid->ThisRank(),o,i,gcoor);
+	  mergebuf[i]=(Integer)gcoor[mu];
+	}
+	merge<vector_type,scalar_type>(vI,mergebuf);
+	l._odata[o]=vI;
       }
-    }}
+    };
+
 }
-
-NAMESPACE_END(Grid);
-
+#endif

Grid/lattice/Lattice_local.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,8 +23,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LATTICE_LOCALREDUCTION_H
 #define GRID_LATTICE_LOCALREDUCTION_H
 
@@ -32,56 +32,44 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 // localInner, localNorm, outerProduct
 ///////////////////////////////////////////////
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-/////////////////////////////////////////////////////
-// Non site, reduced locally reduced routines
-/////////////////////////////////////////////////////
+  /////////////////////////////////////////////////////
+  // Non site, reduced locally reduced routines
+  /////////////////////////////////////////////////////
   
-// localNorm2,
-template<class vobj>
-inline auto localNorm2 (const Lattice<vobj> &rhs)-> Lattice<typename vobj::tensor_reduced>
-{
-  Lattice<typename vobj::tensor_reduced> ret(rhs.Grid());
-  auto rhs_v = rhs.View();
-  auto ret_v = ret.View();
-  accelerator_for(ss,rhs_v.size(),vobj::Nsimd(),{
-    coalescedWrite(ret_v[ss],innerProduct(rhs_v(ss),rhs_v(ss)));
-  });
-  return ret;
-}
+  // localNorm2,
+  template<class vobj>
+    inline auto localNorm2 (const Lattice<vobj> &rhs)-> Lattice<typename vobj::tensor_reduced>
+    {
+      Lattice<typename vobj::tensor_reduced> ret(rhs._grid);
+      parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
+	ret._odata[ss]=innerProduct(rhs._odata[ss],rhs._odata[ss]);
+      }
+      return ret;
+    }
   
-// localInnerProduct
-template<class vobj>
-inline auto localInnerProduct (const Lattice<vobj> &lhs,const Lattice<vobj> &rhs) -> Lattice<typename vobj::tensor_reduced>
-{
-  Lattice<typename vobj::tensor_reduced> ret(rhs.Grid());
-  auto lhs_v = lhs.View();
-  auto rhs_v = rhs.View();
-  auto ret_v = ret.View();
-  accelerator_for(ss,rhs_v.size(),vobj::Nsimd(),{
-    coalescedWrite(ret_v[ss],innerProduct(lhs_v(ss),rhs_v(ss)));
-  });
-  return ret;
-}
+  // localInnerProduct
+  template<class vobj>
+    inline auto localInnerProduct (const Lattice<vobj> &lhs,const Lattice<vobj> &rhs) -> Lattice<typename vobj::tensor_reduced>
+    {
+      Lattice<typename vobj::tensor_reduced> ret(rhs._grid);
+      parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
+	ret._odata[ss]=innerProduct(lhs._odata[ss],rhs._odata[ss]);
+      }
+      return ret;
+    }
   
-// outerProduct Scalar x Scalar -> Scalar
-//              Vector x Vector -> Matrix
-template<class ll,class rr>
-inline auto outerProduct (const Lattice<ll> &lhs,const Lattice<rr> &rhs) -> Lattice<decltype(outerProduct(ll(),rr()))>
-{
-  typedef decltype(coalescedRead(ll())) sll;
-  typedef decltype(coalescedRead(rr())) srr;
-  Lattice<decltype(outerProduct(ll(),rr()))> ret(rhs.Grid());
-  auto lhs_v = lhs.View();
-  auto rhs_v = rhs.View();
-  auto ret_v = ret.View();
-  accelerator_for(ss,rhs_v.size(),1,{
-    // FIXME had issues with scalar version of outer 
-    // Use vector [] operator and don't read coalesce this loop
-    ret_v[ss]=outerProduct(lhs_v[ss],rhs_v[ss]);
-  });
-  return ret;
+  // outerProduct Scalar x Scalar -> Scalar
+  //              Vector x Vector -> Matrix
+  template<class ll,class rr>
+    inline auto outerProduct (const Lattice<ll> &lhs,const Lattice<rr> &rhs) -> Lattice<decltype(outerProduct(lhs._odata[0],rhs._odata[0]))>
+  {
+    Lattice<decltype(outerProduct(lhs._odata[0],rhs._odata[0]))> ret(rhs._grid);
+    parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
+      ret._odata[ss]=outerProduct(lhs._odata[ss],rhs._odata[ss]);
+    }
+    return ret;
+  }
 }
-NAMESPACE_END(Grid);
 #endif

Grid/lattice/Lattice_matrix_reduction.h

@@ -1,202 +0,0 @@
-/*************************************************************************************
-    Grid physics library, www.github.com/paboyle/Grid 
-    Source file: ./lib/lattice/Lattice_reduction.h
-    Copyright (C) 2015
-Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
-Author: Peter Boyle <paboyle@ph.ed.ac.uk>
-Author: paboyle <paboyle@ph.ed.ac.uk>
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-    You should have received a copy of the GNU General Public License along
-    with this program; if not, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-    See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
-#pragma once 
-#include <Grid/Grid_Eigen_Dense.h>
-
-#ifdef GRID_WARN_SUBOPTIMAL
-#warning "Optimisation alert all these reduction loops are NOT threaded "
-#endif     
-
-NAMESPACE_BEGIN(Grid);
-
-template<class vobj>
-static void sliceMaddMatrix (Lattice<vobj> &R,Eigen::MatrixXcd &aa,const Lattice<vobj> &X,const Lattice<vobj> &Y,int Orthog,RealD scale=1.0) 
-{    
-  typedef typename vobj::scalar_object sobj;
-  typedef typename vobj::scalar_type scalar_type;
-  typedef typename vobj::vector_type vector_type;
-
-  int Nblock = X.Grid()->GlobalDimensions()[Orthog];
-
-  GridBase *FullGrid  = X.Grid();
-  //  GridBase *SliceGrid = makeSubSliceGrid(FullGrid,Orthog);
-
-  //  Lattice<vobj> Xslice(SliceGrid);
-  //  Lattice<vobj> Rslice(SliceGrid);
-
-  assert( FullGrid->_simd_layout[Orthog]==1);
-
-  //FIXME package in a convenient iterator
-  //Should loop over a plane orthogonal to direction "Orthog"
-  int stride=FullGrid->_slice_stride[Orthog];
-  int block =FullGrid->_slice_block [Orthog];
-  int nblock=FullGrid->_slice_nblock[Orthog];
-  int ostride=FullGrid->_ostride[Orthog];
-  auto X_v = X.View();
-  auto Y_v = Y.View();
-  auto R_v = R.View();
-  thread_region
-  {
-    std::vector<vobj> s_x(Nblock);
-
-    thread_loop_collapse2( (int n=0;n<nblock;n++),{
-      for(int b=0;b<block;b++){
-	int o  = n*stride + b;
-
-	for(int i=0;i<Nblock;i++){
-	  s_x[i] = X_v[o+i*ostride];
-	}
-
-	vobj dot;
-	for(int i=0;i<Nblock;i++){
-	  dot = Y_v[o+i*ostride];
-	  for(int j=0;j<Nblock;j++){
-	    dot = dot + s_x[j]*(scale*aa(j,i));
-	  }
-	  R_v[o+i*ostride]=dot;
-	}
-      }});
-  }
-};
-
-template<class vobj>
-static void sliceMulMatrix (Lattice<vobj> &R,Eigen::MatrixXcd &aa,const Lattice<vobj> &X,int Orthog,RealD scale=1.0) 
-{    
-  typedef typename vobj::scalar_object sobj;
-  typedef typename vobj::scalar_type scalar_type;
-  typedef typename vobj::vector_type vector_type;
-
-  int Nblock = X.Grid()->GlobalDimensions()[Orthog];
-
-  GridBase *FullGrid  = X.Grid();
-  assert( FullGrid->_simd_layout[Orthog]==1);
-
-  //FIXME package in a convenient iterator
-  //Should loop over a plane orthogonal to direction "Orthog"
-  int stride=FullGrid->_slice_stride[Orthog];
-  int block =FullGrid->_slice_block [Orthog];
-  int nblock=FullGrid->_slice_nblock[Orthog];
-  int ostride=FullGrid->_ostride[Orthog];
-
-  auto X_v = X.View();
-  auto R_v = R.View();
-
-  thread_region
-  {
-    std::vector<vobj> s_x(Nblock);
-    
-    thread_loop_collapse2( (int n=0;n<nblock;n++),{
-      for(int b=0;b<block;b++){
-	int o  = n*stride + b;
-
-	for(int i=0;i<Nblock;i++){
-	  s_x[i] = X_v[o+i*ostride];
-	}
-
-	vobj dot;
-	for(int i=0;i<Nblock;i++){
-	  dot = s_x[0]*(scale*aa(0,i));
-	  for(int j=1;j<Nblock;j++){
-	    dot = dot + s_x[j]*(scale*aa(j,i));
-	  }
-	  R_v[o+i*ostride]=dot;
-	}
-    }});
-  }
-
-};
-
-
-template<class vobj>
-static void sliceInnerProductMatrix(  Eigen::MatrixXcd &mat, const Lattice<vobj> &lhs,const Lattice<vobj> &rhs,int Orthog) 
-{
-  typedef typename vobj::scalar_object sobj;
-  typedef typename vobj::scalar_type scalar_type;
-  typedef typename vobj::vector_type vector_type;
-  
-  GridBase *FullGrid  = lhs.Grid();
-  //  GridBase *SliceGrid = makeSubSliceGrid(FullGrid,Orthog);
-  
-  int Nblock = FullGrid->GlobalDimensions()[Orthog];
-  
-  //  Lattice<vobj> Lslice(SliceGrid);
-  //  Lattice<vobj> Rslice(SliceGrid);
-  
-  mat = Eigen::MatrixXcd::Zero(Nblock,Nblock);
-
-  assert( FullGrid->_simd_layout[Orthog]==1);
-  //  int nh =  FullGrid->_ndimension;
-  //  int nl = SliceGrid->_ndimension;
-  //  int nl = nh-1;
-
-  //FIXME package in a convenient iterator
-  //Should loop over a plane orthogonal to direction "Orthog"
-  int stride=FullGrid->_slice_stride[Orthog];
-  int block =FullGrid->_slice_block [Orthog];
-  int nblock=FullGrid->_slice_nblock[Orthog];
-  int ostride=FullGrid->_ostride[Orthog];
-
-  typedef typename vobj::vector_typeD vector_typeD;
-  auto lhs_v = lhs.View();
-  auto rhs_v = rhs.View();
-  thread_region {
-    std::vector<vobj> Left(Nblock);
-    std::vector<vobj> Right(Nblock);
-    Eigen::MatrixXcd  mat_thread = Eigen::MatrixXcd::Zero(Nblock,Nblock);
-
-    thread_loop_collapse2((int n=0;n<nblock;n++),{
-      for(int b=0;b<block;b++){
-
-	int o  = n*stride + b;
-
-	for(int i=0;i<Nblock;i++){
-	  Left [i] = lhs_v[o+i*ostride];
-	  Right[i] = rhs_v[o+i*ostride];
-	}
-
-	for(int i=0;i<Nblock;i++){
-	  for(int j=0;j<Nblock;j++){
-	    auto tmp = innerProduct(Left[i],Right[j]);
-	    auto rtmp = TensorRemove(tmp);
-	    ComplexD z = Reduce(rtmp);
-	    mat_thread(i,j) += std::complex<double>(real(z),imag(z));
-	  }}
-    }});
-    thread_critical {
-      mat += mat_thread;
-    }  
-  }
-
-  for(int i=0;i<Nblock;i++){
-    for(int j=0;j<Nblock;j++){
-      ComplexD sum = mat(i,j);
-      FullGrid->GlobalSum(sum);
-      mat(i,j)=sum;
-    }}
-
-  return;
-}
-
-NAMESPACE_END(Grid);
-
-
-

Grid/lattice/Lattice_overload.h

@@ -0,0 +1,138 @@
+    /*************************************************************************************
+
+    Grid physics library, www.github.com/paboyle/Grid 
+
+    Source file: ./lib/lattice/Lattice_overload.h
+
+    Copyright (C) 2015
+
+Author: Peter Boyle <paboyle@ph.ed.ac.uk>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+    See the full license in the file "LICENSE" in the top level distribution directory
+    *************************************************************************************/
+    /*  END LEGAL */
+#ifndef GRID_LATTICE_OVERLOAD_H
+#define GRID_LATTICE_OVERLOAD_H
+
+namespace Grid {
+
+  //////////////////////////////////////////////////////////////////////////////////////////////////////
+  // unary negation
+  //////////////////////////////////////////////////////////////////////////////////////////////////////
+  template<class vobj>
+  inline Lattice<vobj> operator -(const Lattice<vobj> &r)
+  {
+    Lattice<vobj> ret(r._grid);
+    parallel_for(int ss=0;ss<r._grid->oSites();ss++){
+      vstream(ret._odata[ss], -r._odata[ss]);
+    }
+    return ret;
+  } 
+  /////////////////////////////////////////////////////////////////////////////////////
+  // Lattice BinOp Lattice,
+  //NB mult performs conformable check. Do not reapply here for performance.
+  /////////////////////////////////////////////////////////////////////////////////////
+  template<class left,class right>
+    inline auto operator * (const Lattice<left> &lhs,const Lattice<right> &rhs)-> Lattice<decltype(lhs._odata[0]*rhs._odata[0])>
+  {
+    Lattice<decltype(lhs._odata[0]*rhs._odata[0])> ret(rhs._grid);
+    mult(ret,lhs,rhs);
+    return ret;
+  }
+  template<class left,class right>
+    inline auto operator + (const Lattice<left> &lhs,const Lattice<right> &rhs)-> Lattice<decltype(lhs._odata[0]+rhs._odata[0])>
+  {
+    Lattice<decltype(lhs._odata[0]+rhs._odata[0])> ret(rhs._grid);
+    add(ret,lhs,rhs);
+    return ret;
+  }
+  template<class left,class right>
+    inline auto operator - (const Lattice<left> &lhs,const Lattice<right> &rhs)-> Lattice<decltype(lhs._odata[0]-rhs._odata[0])>
+  {
+    Lattice<decltype(lhs._odata[0]-rhs._odata[0])> ret(rhs._grid);
+    sub(ret,lhs,rhs);
+    return ret;
+  }
+  
+  // Scalar BinOp Lattice ;generate return type
+  template<class left,class right>
+  inline auto operator * (const left &lhs,const Lattice<right> &rhs) -> Lattice<decltype(lhs*rhs._odata[0])>
+  {
+    Lattice<decltype(lhs*rhs._odata[0])> ret(rhs._grid);
+    parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
+      decltype(lhs*rhs._odata[0]) tmp=lhs*rhs._odata[ss]; 
+      vstream(ret._odata[ss],tmp);
+	   //      ret._odata[ss]=lhs*rhs._odata[ss];
+    }
+    return ret;
+  }
+  template<class left,class right>
+    inline auto operator + (const left &lhs,const Lattice<right> &rhs) -> Lattice<decltype(lhs+rhs._odata[0])>
+    {
+      Lattice<decltype(lhs+rhs._odata[0])> ret(rhs._grid);
+      parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
+	decltype(lhs+rhs._odata[0]) tmp =lhs-rhs._odata[ss];  
+	vstream(ret._odata[ss],tmp);
+	//	ret._odata[ss]=lhs+rhs._odata[ss];
+      }
+        return ret;
+    }
+  template<class left,class right>
+    inline auto operator - (const left &lhs,const Lattice<right> &rhs) -> Lattice<decltype(lhs-rhs._odata[0])>
+  {
+    Lattice<decltype(lhs-rhs._odata[0])> ret(rhs._grid);
+    parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
+      decltype(lhs-rhs._odata[0]) tmp=lhs-rhs._odata[ss];  
+      vstream(ret._odata[ss],tmp);
+    }
+    return ret;
+  }
+    template<class left,class right>
+      inline auto operator * (const Lattice<left> &lhs,const right &rhs) -> Lattice<decltype(lhs._odata[0]*rhs)>
+    {
+      Lattice<decltype(lhs._odata[0]*rhs)> ret(lhs._grid);
+      parallel_for(int ss=0;ss<lhs._grid->oSites(); ss++){
+	decltype(lhs._odata[0]*rhs) tmp =lhs._odata[ss]*rhs;
+	vstream(ret._odata[ss],tmp);
+	//            ret._odata[ss]=lhs._odata[ss]*rhs;
+      }
+      return ret;
+    }
+    template<class left,class right>
+      inline auto operator + (const Lattice<left> &lhs,const right &rhs) -> Lattice<decltype(lhs._odata[0]+rhs)>
+    {
+        Lattice<decltype(lhs._odata[0]+rhs)> ret(lhs._grid);
+	parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
+	  decltype(lhs._odata[0]+rhs) tmp=lhs._odata[ss]+rhs; 
+	  vstream(ret._odata[ss],tmp);
+	  //	  ret._odata[ss]=lhs._odata[ss]+rhs;
+        }
+        return ret;
+    }
+    template<class left,class right>
+      inline auto operator - (const Lattice<left> &lhs,const right &rhs) -> Lattice<decltype(lhs._odata[0]-rhs)>
+    {
+      Lattice<decltype(lhs._odata[0]-rhs)> ret(lhs._grid);
+      parallel_for(int ss=0;ss<rhs._grid->oSites(); ss++){
+	  decltype(lhs._odata[0]-rhs) tmp=lhs._odata[ss]-rhs;
+	  vstream(ret._odata[ss],tmp);
+	  //	ret._odata[ss]=lhs._odata[ss]-rhs;
+      }
+      return ret;
+    }
+}
+#endif

Grid/lattice/Lattice_peekpoke.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -25,8 +25,8 @@ Author: Peter Boyle <peterboyle@Peters-MacBook-Pro-2.local>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LATTICE_PEEK_H
 #define GRID_LATTICE_PEEK_H
 
@@ -34,184 +34,172 @@ Author: Peter Boyle <peterboyle@Peters-MacBook-Pro-2.local>
 // Peeking and poking around
 ///////////////////////////////////////////////
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+    // Peek internal indices of a Lattice object
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+    template<int Index,class vobj>
+       auto PeekIndex(const Lattice<vobj> &lhs,int i) -> Lattice<decltype(peekIndex<Index>(lhs._odata[0],i))>
+    {
+      Lattice<decltype(peekIndex<Index>(lhs._odata[0],i))> ret(lhs._grid);
+      ret.checkerboard=lhs.checkerboard;
+      parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+	ret._odata[ss] = peekIndex<Index>(lhs._odata[ss],i);
+      }
+      return ret;
+    };
+    template<int Index,class vobj>
+      auto PeekIndex(const Lattice<vobj> &lhs,int i,int j) -> Lattice<decltype(peekIndex<Index>(lhs._odata[0],i,j))>
+    {
+      Lattice<decltype(peekIndex<Index>(lhs._odata[0],i,j))> ret(lhs._grid);
+      ret.checkerboard=lhs.checkerboard;
+      parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+	ret._odata[ss] = peekIndex<Index>(lhs._odata[ss],i,j);
+      }
+      return ret;
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+    // Poke internal indices of a Lattice object
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+    template<int Index,class vobj> 
+    void PokeIndex(Lattice<vobj> &lhs,const Lattice<decltype(peekIndex<Index>(lhs._odata[0],0))> & rhs,int i)
+    {
+      parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+	pokeIndex<Index>(lhs._odata[ss],rhs._odata[ss],i);
+      }      
+    }
+    template<int Index,class vobj>
+      void PokeIndex(Lattice<vobj> &lhs,const Lattice<decltype(peekIndex<Index>(lhs._odata[0],0,0))> & rhs,int i,int j)
+    {
+      parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+	pokeIndex<Index>(lhs._odata[ss],rhs._odata[ss],i,j);
+      }      
+    }
+
+    //////////////////////////////////////////////////////
+    // Poke a scalar object into the SIMD array
+    //////////////////////////////////////////////////////
+    template<class vobj,class sobj>
+    void pokeSite(const sobj &s,Lattice<vobj> &l,const std::vector<int> &site){
+
+      GridBase *grid=l._grid;
+
+      typedef typename vobj::scalar_type scalar_type;
+      typedef typename vobj::vector_type vector_type;
+
+      int Nsimd = grid->Nsimd();
+
+      assert( l.checkerboard== l._grid->CheckerBoard(site));
+      assert( sizeof(sobj)*Nsimd == sizeof(vobj));
+
+      int rank,odx,idx;
+      // Optional to broadcast from node 0.
+      grid->GlobalCoorToRankIndex(rank,odx,idx,site);
+      grid->Broadcast(grid->BossRank(),s);
+
+      std::vector<sobj> buf(Nsimd);
+
+      // extract-modify-merge cycle is easiest way and this is not perf critical
+      if ( rank == grid->ThisRank() ) {
+	extract(l._odata[odx],buf);
+	buf[idx] = s;
+	merge(l._odata[odx],buf);
+      }
+
+      return;
+    };
 
 
-// FIXME accelerator_loop and accelerator_inline these
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// Peek internal indices of a Lattice object
-////////////////////////////////////////////////////////////////////////////////////////////////////
-template<int Index,class vobj> 
-auto PeekIndex(const Lattice<vobj> &lhs,int i) -> Lattice<decltype(peekIndex<Index>(vobj(),i))>
-{
-  Lattice<decltype(peekIndex<Index>(vobj(),i))> ret(lhs.Grid());
-  ret.Checkerboard()=lhs.Checkerboard();
-  auto ret_v = ret.View();
-  auto lhs_v = lhs.View();
-  thread_for( ss, lhs_v.size(), {
-    ret_v[ss] = peekIndex<Index>(lhs_v[ss],i);
-  });
-  return ret;
-};
-template<int Index,class vobj> 
-auto PeekIndex(const Lattice<vobj> &lhs,int i,int j) -> Lattice<decltype(peekIndex<Index>(vobj(),i,j))>
-{
-  Lattice<decltype(peekIndex<Index>(vobj(),i,j))> ret(lhs.Grid());
-  ret.Checkerboard()=lhs.Checkerboard();
-  auto ret_v = ret.View();
-  auto lhs_v = lhs.View();
-  thread_for( ss, lhs_v.size(), {
-    ret_v[ss] = peekIndex<Index>(lhs_v[ss],i,j);
-  });
-  return ret;
-};
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// Poke internal indices of a Lattice object
-////////////////////////////////////////////////////////////////////////////////////////////////////
-template<int Index,class vobj>  
-void PokeIndex(Lattice<vobj> &lhs,const Lattice<decltype(peekIndex<Index>(vobj(),0))> & rhs,int i)
-{
-  auto rhs_v = rhs.View();
-  auto lhs_v = lhs.View();
-  thread_for( ss, lhs_v.size(), {
-    pokeIndex<Index>(lhs_v[ss],rhs_v[ss],i);
-  });
-}
-template<int Index,class vobj> 
-void PokeIndex(Lattice<vobj> &lhs,const Lattice<decltype(peekIndex<Index>(vobj(),0,0))> & rhs,int i,int j)
-{
-  auto rhs_v = rhs.View();
-  auto lhs_v = lhs.View();
-  thread_for( ss, lhs_v.size(), {
-    pokeIndex<Index>(lhs_v[ss],rhs_v[ss],i,j);
-  });
-}
-
-//////////////////////////////////////////////////////
-// Poke a scalar object into the SIMD array
-//////////////////////////////////////////////////////
-template<class vobj,class sobj> 
-void pokeSite(const sobj &s,Lattice<vobj> &l,const Coordinate &site){
-
-  GridBase *grid=l.Grid();
-
-  typedef typename vobj::scalar_type scalar_type;
-  typedef typename vobj::vector_type vector_type;
-
-  int Nsimd = grid->Nsimd();
-
-  assert( l.Checkerboard()== l.Grid()->CheckerBoard(site));
-  assert( sizeof(sobj)*Nsimd == sizeof(vobj));
-
-  int rank,odx,idx;
-  // Optional to broadcast from node 0.
-  grid->GlobalCoorToRankIndex(rank,odx,idx,site);
-  grid->Broadcast(grid->BossRank(),s);
-
-  // extract-modify-merge cycle is easiest way and this is not perf critical
-  ExtractBuffer<sobj> buf(Nsimd);
-  auto l_v = l.View();
-  if ( rank == grid->ThisRank() ) {
-    extract(l_v[odx],buf);
-    buf[idx] = s;
-    merge(l_v[odx],buf);
-  }
-
-  return;
-};
-
-
-//////////////////////////////////////////////////////////
-// Peek a scalar object from the SIMD array
-//////////////////////////////////////////////////////////
-template<class vobj,class sobj>
-void peekSite(sobj &s,const Lattice<vobj> &l,const Coordinate &site){
+    //////////////////////////////////////////////////////////
+    // Peek a scalar object from the SIMD array
+    //////////////////////////////////////////////////////////
+    template<class vobj,class sobj>
+      void peekSite(sobj &s,const Lattice<vobj> &l,const std::vector<int> &site){
         
-  GridBase *grid=l.Grid();
+      GridBase *grid=l._grid;
 
-  typedef typename vobj::scalar_type scalar_type;
-  typedef typename vobj::vector_type vector_type;
+      typedef typename vobj::scalar_type scalar_type;
+      typedef typename vobj::vector_type vector_type;
 
-  int Nsimd = grid->Nsimd();
+      int Nsimd = grid->Nsimd();
 
-  assert( l.Checkerboard() == l.Grid()->CheckerBoard(site));
+      assert( l.checkerboard == l._grid->CheckerBoard(site));
 
-  int rank,odx,idx;
-  grid->GlobalCoorToRankIndex(rank,odx,idx,site);
+      int rank,odx,idx;
+      grid->GlobalCoorToRankIndex(rank,odx,idx,site);
 
-  ExtractBuffer<sobj> buf(Nsimd);
-  auto l_v = l.View();
-  extract(l_v[odx],buf);
+      std::vector<sobj> buf(Nsimd);
+      extract(l._odata[odx],buf);
 
-  s = buf[idx];
+      s = buf[idx];
 
-  grid->Broadcast(rank,s);
+      grid->Broadcast(rank,s);
 
-  return;
-};
+      return;
+    };
 
 
-//////////////////////////////////////////////////////////
-// Peek a scalar object from the SIMD array
-//////////////////////////////////////////////////////////
-template<class vobj,class sobj>
-inline void peekLocalSite(sobj &s,const Lattice<vobj> &l,Coordinate &site){
+    //////////////////////////////////////////////////////////
+    // Peek a scalar object from the SIMD array
+    //////////////////////////////////////////////////////////
+    template<class vobj,class sobj>
+    void peekLocalSite(sobj &s,const Lattice<vobj> &l,std::vector<int> &site){
         
-  GridBase *grid = l.Grid();
+      GridBase *grid = l._grid;
 
-  typedef typename vobj::scalar_type scalar_type;
-  typedef typename vobj::vector_type vector_type;
+      typedef typename vobj::scalar_type scalar_type;
+      typedef typename vobj::vector_type vector_type;
 
-  int Nsimd = grid->Nsimd();
+      int Nsimd = grid->Nsimd();
 
-  assert( l.Checkerboard()== l.Grid()->CheckerBoard(site));
-  assert( sizeof(sobj)*Nsimd == sizeof(vobj));
+      assert( l.checkerboard== l._grid->CheckerBoard(site));
+      assert( sizeof(sobj)*Nsimd == sizeof(vobj));
 
-  static const int words=sizeof(vobj)/sizeof(vector_type);
-  int odx,idx;
-  idx= grid->iIndex(site);
-  odx= grid->oIndex(site);
-  
-  auto l_v = l.View();
-  scalar_type * vp = (scalar_type *)&l_v[odx];
-  scalar_type * pt = (scalar_type *)&s;
+      static const int words=sizeof(vobj)/sizeof(vector_type);
+      int odx,idx;
+      idx= grid->iIndex(site);
+      odx= grid->oIndex(site);
+
+      scalar_type * vp = (scalar_type *)&l._odata[odx];
+      scalar_type * pt = (scalar_type *)&s;
       
-  for(int w=0;w<words;w++){
-    pt[w] = vp[idx+w*Nsimd];
-  }
+      for(int w=0;w<words;w++){
+        pt[w] = vp[idx+w*Nsimd];
+      }
       
-  return;
-};
+      return;
+    };
 
-template<class vobj,class sobj>
-inline void pokeLocalSite(const sobj &s,Lattice<vobj> &l,Coordinate &site){
+    template<class vobj,class sobj>
+    void pokeLocalSite(const sobj &s,Lattice<vobj> &l,std::vector<int> &site){
 
-  GridBase *grid=l.Grid();
+      GridBase *grid=l._grid;
 
-  typedef typename vobj::scalar_type scalar_type;
-  typedef typename vobj::vector_type vector_type;
+      typedef typename vobj::scalar_type scalar_type;
+      typedef typename vobj::vector_type vector_type;
 
-  int Nsimd = grid->Nsimd();
+      int Nsimd = grid->Nsimd();
 
-  assert( l.Checkerboard()== l.Grid()->CheckerBoard(site));
-  assert( sizeof(sobj)*Nsimd == sizeof(vobj));
+      assert( l.checkerboard== l._grid->CheckerBoard(site));
+      assert( sizeof(sobj)*Nsimd == sizeof(vobj));
 
-  static const int words=sizeof(vobj)/sizeof(vector_type);
-  int odx,idx;
-  idx= grid->iIndex(site);
-  odx= grid->oIndex(site);
+      static const int words=sizeof(vobj)/sizeof(vector_type);
+      int odx,idx;
+      idx= grid->iIndex(site);
+      odx= grid->oIndex(site);
 
-  auto l_v = l.View();
-  scalar_type * vp = (scalar_type *)&l_v[odx];
-  scalar_type * pt = (scalar_type *)&s;
-  for(int w=0;w<words;w++){
-    vp[idx+w*Nsimd] = pt[w];
-  }
+      scalar_type * vp = (scalar_type *)&l._odata[odx];
+      scalar_type * pt = (scalar_type *)&s;
+      
+      for(int w=0;w<words;w++){
+        vp[idx+w*Nsimd] = pt[w];
+      }
 
-  return;
-};
+      return;
+    };
 
-NAMESPACE_END(Grid);
+}
 #endif
 

Grid/lattice/Lattice_reality.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -25,8 +25,8 @@ Author: neo <cossu@post.kek.jp>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LATTICE_REALITY_H
 #define GRID_LATTICE_REALITY_H
 
@@ -36,30 +36,22 @@ Author: neo <cossu@post.kek.jp>
 // The choice of burying complex in the SIMD
 // is making the use of "real" and "imag" very cumbersome
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-template<class vobj> inline Lattice<vobj> adj(const Lattice<vobj> &lhs){
-  Lattice<vobj> ret(lhs.Grid());
-  ret.Checkerboard()=lhs.Checkerboard();
-  auto lhs_v = lhs.View();
-  auto ret_v = ret.View();
-  accelerator_for( ss, lhs_v.size(), vobj::Nsimd(), {
-    coalescedWrite(ret_v[ss], adj(lhs_v(ss)));
-  });
-  return ret;
-};
-
-template<class vobj> inline Lattice<vobj> conjugate(const Lattice<vobj> &lhs){
-  Lattice<vobj> ret(lhs.Grid());
-  ret.Checkerboard() = lhs.Checkerboard();
-  auto lhs_v = lhs.View();
-  auto ret_v = ret.View();
-  accelerator_for( ss, lhs_v.size(), vobj::Nsimd(), {
-    coalescedWrite( ret_v[ss] , conjugate(lhs_v(ss)));
-  });
-  return ret;
-};
-
-NAMESPACE_END(Grid);
+    template<class vobj> inline Lattice<vobj> adj(const Lattice<vobj> &lhs){
+        Lattice<vobj> ret(lhs._grid);
+	parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+            ret._odata[ss] = adj(lhs._odata[ss]);
+        }
+        return ret;
+    };
 
+    template<class vobj> inline Lattice<vobj> conjugate(const Lattice<vobj> &lhs){
+        Lattice<vobj> ret(lhs._grid);
+	parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+	  ret._odata[ss] = conjugate(lhs._odata[ss]);
+        }
+        return ret;
+    };
+}
 #endif

Grid/lattice/Lattice_reduction.h

@@ -5,7 +5,6 @@
 Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
 Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 Author: paboyle <paboyle@ph.ed.ac.uk>
-Author: Christoph Lehner <christoph@lhnr.de>
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
@@ -20,136 +19,58 @@ Author: Christoph Lehner <christoph@lhnr.de>
     See the full license in the file "LICENSE" in the top level distribution directory
     *************************************************************************************/
     /*  END LEGAL */
-#pragma once
+#ifndef GRID_LATTICE_REDUCTION_H
+#define GRID_LATTICE_REDUCTION_H
 
 #include <Grid/Grid_Eigen_Dense.h>
 
+namespace Grid {
+#ifdef GRID_WARN_SUBOPTIMAL
+#warning "Optimisation alert all these reduction loops are NOT threaded "
+#endif     
 
-#ifdef GRID_NVCC
-#include <Grid/lattice/Lattice_reduction_gpu.h>
-#endif
-
-NAMESPACE_BEGIN(Grid);
-
-//////////////////////////////////////////////////////
-// FIXME this should promote to double and accumulate
-//////////////////////////////////////////////////////
-template<class vobj>
-inline typename vobj::scalar_object sum_cpu(const vobj *arg, Integer osites)
-{
-  typedef typename vobj::scalar_object  sobj;
-
-  const int Nsimd = vobj::Nsimd();
-  const int nthread = GridThread::GetThreads();
-
-  Vector<sobj> sumarray(nthread);
-  for(int i=0;i<nthread;i++){
-    sumarray[i]=Zero();
-  }
-  
-  thread_for(thr,nthread, {
-    int nwork, mywork, myoff;
-    nwork = osites;
-    GridThread::GetWork(nwork,thr,mywork,myoff);
-    vobj vvsum=Zero();
-    for(int ss=myoff;ss<mywork+myoff; ss++){
-      vvsum = vvsum + arg[ss];
-    }
-    sumarray[thr]=Reduce(vvsum);
-  });
-  
-  sobj ssum=Zero();  // sum across threads
-  for(int i=0;i<nthread;i++){
-    ssum = ssum+sumarray[i];
-  } 
-  
-  return ssum;
-}
-template<class vobj>
-inline typename vobj::scalar_object sum(const vobj *arg, Integer osites)
-{
-#ifdef GRID_NVCC
-  return sum_gpu(arg,osites);
-#else
-  return sum_cpu(arg,osites);
-#endif  
-}
-template<class vobj>
-inline typename vobj::scalar_object sum(const Lattice<vobj> &arg)
-{
-  auto arg_v = arg.View();
-  Integer osites = arg.Grid()->oSites();
-  auto ssum= sum(&arg_v[0],osites);
-  arg.Grid()->GlobalSum(ssum);
-  return ssum;
-}
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// Deterministic Reduction operations
-////////////////////////////////////////////////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////////////////////////////////////////////////
+  // Deterministic Reduction operations
+  ////////////////////////////////////////////////////////////////////////////////////////////////////
 template<class vobj> inline RealD norm2(const Lattice<vobj> &arg){
-  ComplexD nrm = innerProduct(arg,arg);
-  return real(nrm); 
+  auto nrm = innerProduct(arg,arg);
+  return std::real(nrm); 
 }
 
 // Double inner product
 template<class vobj>
-inline ComplexD rankInnerProduct(const Lattice<vobj> &left,const Lattice<vobj> &right)
+inline ComplexD innerProduct(const Lattice<vobj> &left,const Lattice<vobj> &right)
 {
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_typeD vector_type;
-  ComplexD  nrm;
-  
-  GridBase *grid = left.Grid();
-  
-  // Might make all code paths go this way.
-  auto left_v = left.AcceleratorView(ViewRead);
-  auto right_v=right.AcceleratorView(ViewRead);
+  GridBase *grid = left._grid;
+  const int pad = 8;
 
-  const uint64_t nsimd = grid->Nsimd();
-  const uint64_t sites = grid->oSites();
-  
-#ifdef GRID_NVCC
-  // GPU - SIMT lane compliance...
-  typedef decltype(innerProduct(left_v[0],right_v[0])) inner_t;
-  Vector<inner_t> inner_tmp(sites);
-  auto inner_tmp_v = &inner_tmp[0];
-  
+  ComplexD  inner;
+  Vector<ComplexD> sumarray(grid->SumArraySize()*pad);
 
-  accelerator_for( ss, sites, nsimd,{
-      auto x_l = left_v(ss);
-      auto y_l = right_v(ss);
-      coalescedWrite(inner_tmp_v[ss],innerProduct(x_l,y_l));
-  })
-
-  // This is in single precision and fails some tests
-  // Need a sumD that sums in double
-  nrm = TensorRemove(sumD_gpu(inner_tmp_v,sites));  
-#else
-  // CPU 
-  typedef decltype(innerProductD(left_v[0],right_v[0])) inner_t;
-  Vector<inner_t> inner_tmp(sites);
-  auto inner_tmp_v = &inner_tmp[0];
+  parallel_for(int thr=0;thr<grid->SumArraySize();thr++){
+    int nwork, mywork, myoff;
+    GridThread::GetWork(left._grid->oSites(),thr,mywork,myoff);
+    
+    decltype(innerProductD(left._odata[0],right._odata[0])) vinner=zero; // private to thread; sub summation
+    for(int ss=myoff;ss<mywork+myoff; ss++){
+      vinner = vinner + innerProductD(left._odata[ss],right._odata[ss]);
+    }
+    // All threads sum across SIMD; reduce serial work at end
+    // one write per cacheline with streaming store
+    ComplexD tmp = Reduce(TensorRemove(vinner)) ;
+    vstream(sumarray[thr*pad],tmp);
+  }
   
-  accelerator_for( ss, sites, nsimd,{
-      auto x_l = left_v[ss];
-      auto y_l = right_v[ss];
-      inner_tmp_v[ss]=innerProductD(x_l,y_l);
-  })
-  nrm = TensorRemove(sum(inner_tmp_v,sites));
-#endif
-  return nrm;
+  inner=0.0;
+  for(int i=0;i<grid->SumArraySize();i++){
+    inner = inner+sumarray[i*pad];
+  } 
+  right._grid->GlobalSum(inner);
+  return inner;
 }
 
-template<class vobj>
-inline ComplexD innerProduct(const Lattice<vobj> &left,const Lattice<vobj> &right) {
-  GridBase *grid = left.Grid();
-  ComplexD nrm = rankInnerProduct(left,right);
-  grid->GlobalSum(nrm);
-  return nrm;
-}
-
-
 /////////////////////////
 // Fast axpby_norm
 // z = a x + b y
@@ -165,7 +86,8 @@ axpy_norm_fast(Lattice<vobj> &z,sobj a,const Lattice<vobj> &x,const Lattice<vobj
 template<class sobj,class vobj> strong_inline RealD 
 axpby_norm_fast(Lattice<vobj> &z,sobj a,sobj b,const Lattice<vobj> &x,const Lattice<vobj> &y) 
 {
-  z.Checkerboard() = x.Checkerboard();
+  const int pad = 8;
+  z.checkerboard = x.checkerboard;
   conformable(z,x);
   conformable(x,y);
 
@@ -173,113 +95,43 @@ axpby_norm_fast(Lattice<vobj> &z,sobj a,sobj b,const Lattice<vobj> &x,const Latt
   typedef typename vobj::vector_typeD vector_type;
   RealD  nrm;
   
-  GridBase *grid = x.Grid();
-
-  auto x_v=x.AcceleratorView(ViewRead);
-  auto y_v=y.AcceleratorView(ViewRead);
-  auto z_v=z.AcceleratorView(ViewWrite);
-
-  const uint64_t nsimd = grid->Nsimd();
-  const uint64_t sites = grid->oSites();
+  GridBase *grid = x._grid;
   
-#ifdef GRID_NVCC
-  // GPU
-  typedef decltype(innerProduct(x_v[0],y_v[0])) inner_t;
-  Vector<inner_t> inner_tmp(sites);
-  auto inner_tmp_v = &inner_tmp[0];
-
-  accelerator_for( ss, sites, nsimd,{
-      auto tmp = a*x_v(ss)+b*y_v(ss);
-      coalescedWrite(inner_tmp_v[ss],innerProduct(tmp,tmp));
-      coalescedWrite(z_v[ss],tmp);
-  });
-
-  nrm = real(TensorRemove(sumD_gpu(inner_tmp_v,sites)));
-#else
-  // CPU 
-  typedef decltype(innerProductD(x_v[0],y_v[0])) inner_t;
-  Vector<inner_t> inner_tmp(sites);
-  auto inner_tmp_v = &inner_tmp[0];
+  Vector<RealD> sumarray(grid->SumArraySize()*pad);
   
-  accelerator_for( ss, sites, nsimd,{
-      auto tmp = a*x_v(ss)+b*y_v(ss);
-      inner_tmp_v[ss]=innerProductD(tmp,tmp);
-      z_v[ss]=tmp;
-  });
-  // Already promoted to double
-  nrm = real(TensorRemove(sum(inner_tmp_v,sites)));
-#endif
-  grid->GlobalSum(nrm);
+  parallel_for(int thr=0;thr<grid->SumArraySize();thr++){
+    int nwork, mywork, myoff;
+    GridThread::GetWork(x._grid->oSites(),thr,mywork,myoff);
+    
+    // private to thread; sub summation
+    decltype(innerProductD(z._odata[0],z._odata[0])) vnrm=zero; 
+    for(int ss=myoff;ss<mywork+myoff; ss++){
+      vobj tmp = a*x._odata[ss]+b*y._odata[ss];
+      vnrm = vnrm + innerProductD(tmp,tmp);
+      vstream(z._odata[ss],tmp);
+    }
+    vstream(sumarray[thr*pad],real(Reduce(TensorRemove(vnrm)))) ;
+  }
+  
+  nrm = 0.0; // sum across threads; linear in thread count but fast
+  for(int i=0;i<grid->SumArraySize();i++){
+    nrm = nrm+sumarray[i*pad];
+  } 
+  z._grid->GlobalSum(nrm);
   return nrm; 
 }
+
  
-template<class vobj> strong_inline void
-innerProductNorm(ComplexD& ip, RealD &nrm, const Lattice<vobj> &left,const Lattice<vobj> &right)
-{
-  conformable(left,right);
-
-  typedef typename vobj::scalar_type scalar_type;
-  typedef typename vobj::vector_typeD vector_type;
-  Vector<ComplexD> tmp(2);
-
-  GridBase *grid = left.Grid();
-
-  auto left_v=left.AcceleratorView(ViewRead);
-  auto right_v=right.AcceleratorView(ViewRead);
-
-  const uint64_t nsimd = grid->Nsimd();
-  const uint64_t sites = grid->oSites();
-
-#ifdef GRID_NVCC
-  // GPU
-  typedef decltype(innerProduct(left_v[0],right_v[0])) inner_t;
-  typedef decltype(innerProduct(left_v[0],left_v[0])) norm_t;
-  Vector<inner_t> inner_tmp(sites);
-  Vector<norm_t> norm_tmp(sites);
-  auto inner_tmp_v = &inner_tmp[0];
-  auto norm_tmp_v = &norm_tmp[0];
-
-  accelerator_for( ss, sites, nsimd,{
-      auto left_tmp = left_v(ss);
-      coalescedWrite(inner_tmp_v[ss],innerProduct(left_tmp,right_v(ss)));
-      coalescedWrite(norm_tmp_v[ss],innerProduct(left_tmp,left_tmp));
-  });
-
-  tmp[0] = TensorRemove(sumD_gpu(inner_tmp_v,sites));
-  tmp[1] = TensorRemove(sumD_gpu(norm_tmp_v,sites));
-#else
-  // CPU
-  typedef decltype(innerProductD(left_v[0],right_v[0])) inner_t;
-  typedef decltype(innerProductD(left_v[0],left_v[0])) norm_t;
-  Vector<inner_t> inner_tmp(sites);
-  Vector<norm_t> norm_tmp(sites);
-  auto inner_tmp_v = &inner_tmp[0];
-  auto norm_tmp_v = &norm_tmp[0];
-
-  accelerator_for( ss, sites, nsimd,{
-      auto left_tmp = left_v(ss);
-      inner_tmp_v[ss] = innerProductD(left_tmp,right_v(ss));
-      norm_tmp_v[ss] = innerProductD(left_tmp,left_tmp);
-  });
-  // Already promoted to double
-  tmp[0] = TensorRemove(sum(inner_tmp_v,sites));
-  tmp[1] = TensorRemove(sum(norm_tmp_v,sites));
-#endif
-  grid->GlobalSumVector(&tmp[0],2); // keep norm Complex -> can use GlobalSumVector
-  ip = tmp[0];
-  nrm = real(tmp[1]);
-}
-
 template<class Op,class T1>
 inline auto sum(const LatticeUnaryExpression<Op,T1> & expr)
-  ->typename decltype(expr.op.func(eval(0,expr.arg1)))::scalar_object
+  ->typename decltype(expr.first.func(eval(0,std::get<0>(expr.second))))::scalar_object
 {
   return sum(closure(expr));
 }
 
 template<class Op,class T1,class T2>
 inline auto sum(const LatticeBinaryExpression<Op,T1,T2> & expr)
-      ->typename decltype(expr.op.func(eval(0,expr.arg1),eval(0,expr.arg2)))::scalar_object
+      ->typename decltype(expr.first.func(eval(0,std::get<0>(expr.second)),eval(0,std::get<1>(expr.second))))::scalar_object
 {
   return sum(closure(expr));
 }
@@ -287,14 +139,54 @@ inline auto sum(const LatticeBinaryExpression<Op,T1,T2> & expr)
 
 template<class Op,class T1,class T2,class T3>
 inline auto sum(const LatticeTrinaryExpression<Op,T1,T2,T3> & expr)
-  ->typename decltype(expr.op.func(eval(0,expr.arg1),
-				      eval(0,expr.arg2),
-				      eval(0,expr.arg3)
+  ->typename decltype(expr.first.func(eval(0,std::get<0>(expr.second)),
+				      eval(0,std::get<1>(expr.second)),
+				      eval(0,std::get<2>(expr.second))
 				      ))::scalar_object
 {
   return sum(closure(expr));
 }
 
+template<class vobj>
+inline typename vobj::scalar_object sum(const Lattice<vobj> &arg)
+{
+  GridBase *grid=arg._grid;
+  int Nsimd = grid->Nsimd();
+  
+  std::vector<vobj,alignedAllocator<vobj> > sumarray(grid->SumArraySize());
+  for(int i=0;i<grid->SumArraySize();i++){
+    sumarray[i]=zero;
+  }
+  
+  parallel_for(int thr=0;thr<grid->SumArraySize();thr++){
+    int nwork, mywork, myoff;
+    GridThread::GetWork(grid->oSites(),thr,mywork,myoff);
+    
+    vobj vvsum=zero;
+    for(int ss=myoff;ss<mywork+myoff; ss++){
+      vvsum = vvsum + arg._odata[ss];
+    }
+    sumarray[thr]=vvsum;
+  }
+  
+  vobj vsum=zero;  // sum across threads
+  for(int i=0;i<grid->SumArraySize();i++){
+    vsum = vsum+sumarray[i];
+  } 
+  
+  typedef typename vobj::scalar_object sobj;
+  sobj ssum=zero;
+  
+  std::vector<sobj>               buf(Nsimd);
+  extract(vsum,buf);
+  
+  for(int i=0;i<Nsimd;i++) ssum = ssum + buf[i];
+  arg._grid->GlobalSum(ssum);
+  
+  return ssum;
+}
+
+
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // sliceSum, sliceInnerProduct, sliceAxpy, sliceNorm etc...
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -307,7 +199,7 @@ template<class vobj> inline void sliceSum(const Lattice<vobj> &Data,std::vector<
   // But easily avoided by using double precision fields
   ///////////////////////////////////////////////////////
   typedef typename vobj::scalar_object sobj;
-  GridBase  *grid = Data.Grid();
+  GridBase  *grid = Data._grid;
   assert(grid!=NULL);
 
   const int    Nd = grid->_ndimension;
@@ -320,13 +212,13 @@ template<class vobj> inline void sliceSum(const Lattice<vobj> &Data,std::vector<
   int ld=grid->_ldimensions[orthogdim];
   int rd=grid->_rdimensions[orthogdim];
 
-  Vector<vobj> lvSum(rd); // will locally sum vectors first
-  Vector<sobj> lsSum(ld,Zero());                    // sum across these down to scalars
-  ExtractBuffer<sobj> extracted(Nsimd);                  // splitting the SIMD
+  std::vector<vobj,alignedAllocator<vobj> > lvSum(rd); // will locally sum vectors first
+  std::vector<sobj> lsSum(ld,zero);                    // sum across these down to scalars
+  std::vector<sobj> extracted(Nsimd);                  // splitting the SIMD
 
   result.resize(fd); // And then global sum to return the same vector to every node 
   for(int r=0;r<rd;r++){
-    lvSum[r]=Zero();
+    lvSum[r]=zero;
   }
 
   int e1=    grid->_slice_nblock[orthogdim];
@@ -335,19 +227,20 @@ template<class vobj> inline void sliceSum(const Lattice<vobj> &Data,std::vector<
 
   // sum over reduced dimension planes, breaking out orthog dir
   // Parallel over orthog direction
-  auto Data_v=Data.View();
-  thread_for( r,rd, {
+  parallel_for(int r=0;r<rd;r++){
+
     int so=r*grid->_ostride[orthogdim]; // base offset for start of plane 
+
     for(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
 	int ss= so+n*stride+b;
-	lvSum[r]=lvSum[r]+Data_v[ss];
+	lvSum[r]=lvSum[r]+Data._odata[ss];
       }
     }
-  });
+  }
 
   // Sum across simd lanes in the plane, breaking out orthog dir.
-  Coordinate icoor(Nd);
+  std::vector<int> icoor(Nd);
 
   for(int rt=0;rt<rd;rt++){
 
@@ -372,7 +265,7 @@ template<class vobj> inline void sliceSum(const Lattice<vobj> &Data,std::vector<
     if ( pt == grid->_processor_coor[orthogdim] ) {
       gsum=lsSum[lt];
     } else {
-      gsum=Zero();
+      gsum=zero;
     }
 
     grid->GlobalSum(gsum);
@@ -381,14 +274,123 @@ template<class vobj> inline void sliceSum(const Lattice<vobj> &Data,std::vector<
   }
 }
 
+template<class vobj>
+static void mySliceInnerProductVector( std::vector<ComplexD> & result, const Lattice<vobj> &lhs,const Lattice<vobj> &rhs,int orthogdim)
+{
+  // std::cout << GridLogMessage << "Start mySliceInnerProductVector" << std::endl;
+
+  typedef typename vobj::scalar_type scalar_type;
+  std::vector<scalar_type> lsSum;
+  localSliceInnerProductVector(result, lhs, rhs, lsSum, orthogdim);
+  globalSliceInnerProductVector(result, lhs, lsSum, orthogdim);
+  // std::cout << GridLogMessage << "End mySliceInnerProductVector" << std::endl;
+}
+
+template <class vobj>
+static void localSliceInnerProductVector(std::vector<ComplexD> &result, const Lattice<vobj> &lhs, const Lattice<vobj> &rhs, std::vector<typename vobj::scalar_type> &lsSum, int orthogdim)
+{
+  // std::cout << GridLogMessage << "Start prep" << std::endl;
+  typedef typename vobj::vector_type   vector_type;
+  typedef typename vobj::scalar_type   scalar_type;
+  GridBase  *grid = lhs._grid;
+  assert(grid!=NULL);
+  conformable(grid,rhs._grid);
+
+  const int    Nd = grid->_ndimension;
+  const int Nsimd = grid->Nsimd();
+
+  assert(orthogdim >= 0);
+  assert(orthogdim < Nd);
+
+  int fd=grid->_fdimensions[orthogdim];
+  int ld=grid->_ldimensions[orthogdim];
+  int rd=grid->_rdimensions[orthogdim];
+  // std::cout << GridLogMessage << "Start alloc" << std::endl;
+
+  std::vector<vector_type,alignedAllocator<vector_type> > lvSum(rd); // will locally sum vectors first
+  lsSum.resize(ld,scalar_type(0.0));                    // sum across these down to scalars
+  std::vector<iScalar<scalar_type>> extracted(Nsimd);   // splitting the SIMD  
+  // std::cout << GridLogMessage << "End alloc" << std::endl;
+
+  result.resize(fd); // And then global sum to return the same vector to every node for IO to file
+  for(int r=0;r<rd;r++){
+    lvSum[r]=zero;
+  }
+
+  int e1=    grid->_slice_nblock[orthogdim];
+  int e2=    grid->_slice_block [orthogdim];
+  int stride=grid->_slice_stride[orthogdim];
+  // std::cout << GridLogMessage << "End prep" << std::endl;
+  // std::cout << GridLogMessage << "Start parallel inner product, _rd = " << rd << std::endl;
+  vector_type vv;
+  parallel_for(int r=0;r<rd;r++)
+  {
+
+    int so=r*grid->_ostride[orthogdim]; // base offset for start of plane 
+
+    for(int n=0;n<e1;n++){
+      for(int b=0;b<e2;b++){
+        int ss = so + n * stride + b;
+        vv = TensorRemove(innerProduct(lhs._odata[ss], rhs._odata[ss]));
+        lvSum[r] = lvSum[r] + vv;
+      }
+    }
+  }
+  // std::cout << GridLogMessage << "End parallel inner product" << std::endl;
+
+  // Sum across simd lanes in the plane, breaking out orthog dir.
+  std::vector<int> icoor(Nd);
+  for(int rt=0;rt<rd;rt++){
+
+    iScalar<vector_type> temp; 
+    temp._internal = lvSum[rt];
+    extract(temp,extracted);
+
+    for(int idx=0;idx<Nsimd;idx++){
+
+      grid->iCoorFromIindex(icoor,idx);
+
+      int ldx =rt+icoor[orthogdim]*rd;
+
+      lsSum[ldx]=lsSum[ldx]+extracted[idx]._internal;
+
+    }
+  }
+  // std::cout << GridLogMessage << "End sum over simd lanes" << std::endl;
+}
+template <class vobj>
+static void globalSliceInnerProductVector(std::vector<ComplexD> &result, const Lattice<vobj> &lhs, std::vector<typename vobj::scalar_type> &lsSum, int orthogdim)
+{
+  typedef typename vobj::scalar_type scalar_type;
+  GridBase *grid = lhs._grid;
+  int fd = result.size();
+  int ld = lsSum.size();
+  // sum over nodes.
+  std::vector<scalar_type> gsum;
+  gsum.resize(fd, scalar_type(0.0));
+  // std::cout << GridLogMessage << "Start of gsum[t] creation:" << std::endl;
+  for(int t=0;t<fd;t++){
+    int pt = t/ld; // processor plane
+    int lt = t%ld;
+    if ( pt == grid->_processor_coor[orthogdim] ) {
+      gsum[t]=lsSum[lt];
+    }
+  }
+  // std::cout << GridLogMessage << "End of gsum[t] creation:" << std::endl;
+  // std::cout << GridLogMessage << "Start of GlobalSumVector:" << std::endl;
+  grid->GlobalSumVector(&gsum[0], fd);
+  // std::cout << GridLogMessage << "End of GlobalSumVector:" << std::endl;
+
+  result = gsum;
+}
 template<class vobj>
 static void sliceInnerProductVector( std::vector<ComplexD> & result, const Lattice<vobj> &lhs,const Lattice<vobj> &rhs,int orthogdim) 
 {
   typedef typename vobj::vector_type   vector_type;
   typedef typename vobj::scalar_type   scalar_type;
-  GridBase  *grid = lhs.Grid();
+  GridBase  *grid = lhs._grid;
   assert(grid!=NULL);
-  conformable(grid,rhs.Grid());
+  conformable(grid,rhs._grid);
 
   const int    Nd = grid->_ndimension;
   const int Nsimd = grid->Nsimd();
@@ -400,36 +402,34 @@ static void sliceInnerProductVector( std::vector<ComplexD> & result, const Latti
   int ld=grid->_ldimensions[orthogdim];
   int rd=grid->_rdimensions[orthogdim];
 
-  Vector<vector_type> lvSum(rd); // will locally sum vectors first
-  Vector<scalar_type > lsSum(ld,scalar_type(0.0));                    // sum across these down to scalars
-  ExtractBuffer<iScalar<scalar_type> > extracted(Nsimd);   // splitting the SIMD  
+  std::vector<vector_type,alignedAllocator<vector_type> > lvSum(rd); // will locally sum vectors first
+  std::vector<scalar_type > lsSum(ld,scalar_type(0.0));                    // sum across these down to scalars
+  std::vector<iScalar<scalar_type> > extracted(Nsimd);                  // splitting the SIMD
 
   result.resize(fd); // And then global sum to return the same vector to every node for IO to file
   for(int r=0;r<rd;r++){
-    lvSum[r]=Zero();
+    lvSum[r]=zero;
   }
 
   int e1=    grid->_slice_nblock[orthogdim];
   int e2=    grid->_slice_block [orthogdim];
   int stride=grid->_slice_stride[orthogdim];
 
-  auto lhv=lhs.View();
-  auto rhv=rhs.View();
-  thread_for( r,rd,{
+  parallel_for(int r=0;r<rd;r++){
 
     int so=r*grid->_ostride[orthogdim]; // base offset for start of plane 
 
     for(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
 	int ss= so+n*stride+b;
-	vector_type vv = TensorRemove(innerProduct(lhv[ss],rhv[ss]));
+	vector_type vv = TensorRemove(innerProduct(lhs._odata[ss],rhs._odata[ss]));
 	lvSum[r]=lvSum[r]+vv;
       }
     }
-  });
+  }
 
   // Sum across simd lanes in the plane, breaking out orthog dir.
-  Coordinate icoor(Nd);
+  std::vector<int> icoor(Nd);
   for(int rt=0;rt<rd;rt++){
 
     iScalar<vector_type> temp; 
@@ -470,7 +470,7 @@ static void sliceNorm (std::vector<RealD> &sn,const Lattice<vobj> &rhs,int Ortho
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
   
-  int Nblock = rhs.Grid()->GlobalDimensions()[Orthog];
+  int Nblock = rhs._grid->GlobalDimensions()[Orthog];
   std::vector<ComplexD> ip(Nblock);
   sn.resize(Nblock);
   
@@ -492,7 +492,7 @@ static void sliceMaddVector(Lattice<vobj> &R,std::vector<RealD> &a,const Lattice
   
   scalar_type zscale(scale);
 
-  GridBase *grid  = X.Grid();
+  GridBase *grid  = X._grid;
 
   int Nsimd  =grid->Nsimd();
   int Nblock =grid->GlobalDimensions()[orthogdim];
@@ -505,7 +505,8 @@ static void sliceMaddVector(Lattice<vobj> &R,std::vector<RealD> &a,const Lattice
   int e2     =grid->_slice_block [orthogdim];
   int stride =grid->_slice_stride[orthogdim];
 
-  Coordinate icoor;
+  std::vector<int> icoor;
+
   for(int r=0;r<rd;r++){
 
     int so=r*grid->_ostride[orthogdim]; // base offset for start of plane 
@@ -521,15 +522,12 @@ static void sliceMaddVector(Lattice<vobj> &R,std::vector<RealD> &a,const Lattice
 
     tensor_reduced at; at=av;
 
-    auto Rv=R.View();
-    auto Xv=X.View();
-    auto Yv=Y.View();
-    thread_for_collapse(2, n, e1, {
+    parallel_for_nest2(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
 	int ss= so+n*stride+b;
-	Rv[ss] = at*Xv[ss]+Yv[ss];
+	R._odata[ss] = at*X._odata[ss]+Y._odata[ss];
       }
-    });
+    }
   }
 };
 
@@ -561,18 +559,18 @@ static void sliceMaddMatrix (Lattice<vobj> &R,Eigen::MatrixXcd &aa,const Lattice
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
 
-  int Nblock = X.Grid()->GlobalDimensions()[Orthog];
+  int Nblock = X._grid->GlobalDimensions()[Orthog];
 
-  GridBase *FullGrid  = X.Grid();
+  GridBase *FullGrid  = X._grid;
   //  GridBase *SliceGrid = makeSubSliceGrid(FullGrid,Orthog);
 
   //  Lattice<vobj> Xslice(SliceGrid);
   //  Lattice<vobj> Rslice(SliceGrid);
 
   assert( FullGrid->_simd_layout[Orthog]==1);
-  //  int nh =  FullGrid->_ndimension;
+  int nh =  FullGrid->_ndimension;
   //  int nl = SliceGrid->_ndimension;
-  //  int nl = nh-1;
+  int nl = nh-1;
 
   //FIXME package in a convenient iterator
   //Should loop over a plane orthogonal to direction "Orthog"
@@ -580,31 +578,28 @@ static void sliceMaddMatrix (Lattice<vobj> &R,Eigen::MatrixXcd &aa,const Lattice
   int block =FullGrid->_slice_block [Orthog];
   int nblock=FullGrid->_slice_nblock[Orthog];
   int ostride=FullGrid->_ostride[Orthog];
-
-  auto X_v=X.View();
-  auto Y_v=Y.View();
-  auto R_v=R.View();
-  thread_region
+#pragma omp parallel 
   {
-    Vector<vobj> s_x(Nblock);
+    std::vector<vobj> s_x(Nblock);
 
-    thread_for_collapse_in_region(2, n,nblock, {
-     for(int b=0;b<block;b++){
+#pragma omp for collapse(2)
+    for(int n=0;n<nblock;n++){
+    for(int b=0;b<block;b++){
       int o  = n*stride + b;
 
       for(int i=0;i<Nblock;i++){
-	s_x[i] = X_v[o+i*ostride];
+	s_x[i] = X[o+i*ostride];
       }
 
       vobj dot;
       for(int i=0;i<Nblock;i++){
-	dot = Y_v[o+i*ostride];
+	dot = Y[o+i*ostride];
 	for(int j=0;j<Nblock;j++){
 	  dot = dot + s_x[j]*(scale*aa(j,i));
 	}
-	R_v[o+i*ostride]=dot;
+	R[o+i*ostride]=dot;
       }
-    }});
+    }}
   }
 };
 
@@ -615,17 +610,17 @@ static void sliceMulMatrix (Lattice<vobj> &R,Eigen::MatrixXcd &aa,const Lattice<
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
 
-  int Nblock = X.Grid()->GlobalDimensions()[Orthog];
+  int Nblock = X._grid->GlobalDimensions()[Orthog];
 
-  GridBase *FullGrid  = X.Grid();
+  GridBase *FullGrid  = X._grid;
   //  GridBase *SliceGrid = makeSubSliceGrid(FullGrid,Orthog);
   //  Lattice<vobj> Xslice(SliceGrid);
   //  Lattice<vobj> Rslice(SliceGrid);
 
   assert( FullGrid->_simd_layout[Orthog]==1);
-  //  int nh =  FullGrid->_ndimension;
+  int nh =  FullGrid->_ndimension;
   //  int nl = SliceGrid->_ndimension;
-  //  int nl=1;
+  int nl=1;
 
   //FIXME package in a convenient iterator
   //Should loop over a plane orthogonal to direction "Orthog"
@@ -633,19 +628,17 @@ static void sliceMulMatrix (Lattice<vobj> &R,Eigen::MatrixXcd &aa,const Lattice<
   int block =FullGrid->_slice_block [Orthog];
   int nblock=FullGrid->_slice_nblock[Orthog];
   int ostride=FullGrid->_ostride[Orthog];
-  auto R_v = R.View();
-  auto X_v = X.View();
-  thread_region
+#pragma omp parallel 
   {
     std::vector<vobj> s_x(Nblock);
 
-
-    thread_for_collapse_in_region( 2 ,n,nblock,{
+#pragma omp for collapse(2)
+    for(int n=0;n<nblock;n++){
     for(int b=0;b<block;b++){
       int o  = n*stride + b;
 
       for(int i=0;i<Nblock;i++){
-	s_x[i] = X_v[o+i*ostride];
+	s_x[i] = X[o+i*ostride];
       }
 
       vobj dot;
@@ -654,10 +647,11 @@ static void sliceMulMatrix (Lattice<vobj> &R,Eigen::MatrixXcd &aa,const Lattice<
 	for(int j=1;j<Nblock;j++){
 	  dot = dot + s_x[j]*(scale*aa(j,i));
 	}
-	R_v[o+i*ostride]=dot;
+	R[o+i*ostride]=dot;
       }
-    }});
+    }}
   }
+
 };
 
 
@@ -668,7 +662,7 @@ static void sliceInnerProductMatrix(  Eigen::MatrixXcd &mat, const Lattice<vobj>
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
   
-  GridBase *FullGrid  = lhs.Grid();
+  GridBase *FullGrid  = lhs._grid;
   //  GridBase *SliceGrid = makeSubSliceGrid(FullGrid,Orthog);
   
   int Nblock = FullGrid->GlobalDimensions()[Orthog];
@@ -679,9 +673,9 @@ static void sliceInnerProductMatrix(  Eigen::MatrixXcd &mat, const Lattice<vobj>
   mat = Eigen::MatrixXcd::Zero(Nblock,Nblock);
 
   assert( FullGrid->_simd_layout[Orthog]==1);
-  //  int nh =  FullGrid->_ndimension;
+  int nh =  FullGrid->_ndimension;
   //  int nl = SliceGrid->_ndimension;
-  //  int nl = nh-1;
+  int nl = nh-1;
 
   //FIXME package in a convenient iterator
   //Should loop over a plane orthogonal to direction "Orthog"
@@ -692,33 +686,31 @@ static void sliceInnerProductMatrix(  Eigen::MatrixXcd &mat, const Lattice<vobj>
 
   typedef typename vobj::vector_typeD vector_typeD;
 
-  auto lhs_v=lhs.View();
-  auto rhs_v=rhs.View();
-  thread_region
+#pragma omp parallel 
   {
     std::vector<vobj> Left(Nblock);
     std::vector<vobj> Right(Nblock);
     Eigen::MatrixXcd  mat_thread = Eigen::MatrixXcd::Zero(Nblock,Nblock);
 
-    thread_for_collapse_in_region( 2, n,nblock,{
+#pragma omp for collapse(2)
+    for(int n=0;n<nblock;n++){
     for(int b=0;b<block;b++){
 
       int o  = n*stride + b;
 
       for(int i=0;i<Nblock;i++){
-	Left [i] = lhs_v[o+i*ostride];
-	Right[i] = rhs_v[o+i*ostride];
+	Left [i] = lhs[o+i*ostride];
+	Right[i] = rhs[o+i*ostride];
       }
 
       for(int i=0;i<Nblock;i++){
       for(int j=0;j<Nblock;j++){
 	auto tmp = innerProduct(Left[i],Right[j]);
 	auto rtmp = TensorRemove(tmp);
-	auto red  =  Reduce(rtmp);
-	mat_thread(i,j) += std::complex<double>(real(red),imag(red));
+	mat_thread(i,j) += Reduce(rtmp);
       }}
-    }});
-    thread_critical
+    }}
+#pragma omp critical
     {
       mat += mat_thread;
     }  
@@ -734,8 +726,8 @@ static void sliceInnerProductMatrix(  Eigen::MatrixXcd &mat, const Lattice<vobj>
   return;
 }
 
-NAMESPACE_END(Grid);
-
+} /*END NAMESPACE GRID*/
+#endif
 
 
 

Grid/lattice/Lattice_reduction_gpu.h

@@ -1,226 +0,0 @@
-NAMESPACE_BEGIN(Grid);
-
-#define WARP_SIZE 32
-extern cudaDeviceProp *gpu_props;
-__device__ unsigned int retirementCount = 0;
-
-template <class Iterator>
-unsigned int nextPow2(Iterator x) {
-  --x;
-  x |= x >> 1;
-  x |= x >> 2;
-  x |= x >> 4;
-  x |= x >> 8;
-  x |= x >> 16;
-  return ++x;
-}
-
-template <class Iterator>
-void getNumBlocksAndThreads(const Iterator n, const size_t sizeofsobj, Iterator &threads, Iterator &blocks) {
-  
-  int device;
-  cudaGetDevice(&device);
-  
-  Iterator warpSize            = gpu_props[device].warpSize;
-  Iterator sharedMemPerBlock   = gpu_props[device].sharedMemPerBlock;
-  Iterator maxThreadsPerBlock  = gpu_props[device].maxThreadsPerBlock;
-  Iterator multiProcessorCount = gpu_props[device].multiProcessorCount;
-  
-  std::cout << GridLogDebug << "GPU has:" << std::endl;
-  std::cout << GridLogDebug << "\twarpSize            = " << warpSize << std::endl;
-  std::cout << GridLogDebug << "\tsharedMemPerBlock   = " << sharedMemPerBlock << std::endl;
-  std::cout << GridLogDebug << "\tmaxThreadsPerBlock  = " << maxThreadsPerBlock << std::endl;
-  std::cout << GridLogDebug << "\tmaxThreadsPerBlock  = " << warpSize << std::endl;
-  std::cout << GridLogDebug << "\tmultiProcessorCount = " << multiProcessorCount << std::endl;
-  
-  if (warpSize != WARP_SIZE) {
-    std::cout << GridLogError << "The warp size of the GPU in use does not match the warp size set when compiling Grid." << std::endl;
-    exit(EXIT_FAILURE);
-  }
-  
-  // let the number of threads in a block be a multiple of 2, starting from warpSize
-  threads = warpSize;
-  while( 2*threads*sizeofsobj < sharedMemPerBlock && 2*threads <= maxThreadsPerBlock ) threads *= 2;
-  // keep all the streaming multiprocessors busy
-  blocks = nextPow2(multiProcessorCount);
-  
-}
-
-template <class sobj, class Iterator>
-__device__ void reduceBlock(volatile sobj *sdata, sobj mySum, const Iterator tid) {
-  
-  Iterator blockSize = blockDim.x;
-  
-  // cannot use overloaded operators for sobj as they are not volatile-qualified
-  memcpy((void *)&sdata[tid], (void *)&mySum, sizeof(sobj));
-  __syncwarp();
-  
-  const Iterator VEC = WARP_SIZE;
-  const Iterator vid = tid & (VEC-1);
-  
-  sobj beta, temp;
-  memcpy((void *)&beta, (void *)&mySum, sizeof(sobj));
-  
-  for (int i = VEC/2; i > 0; i>>=1) {
-    if (vid < i) {
-      memcpy((void *)&temp, (void *)&sdata[tid+i], sizeof(sobj));
-      beta += temp;
-      memcpy((void *)&sdata[tid], (void *)&beta, sizeof(sobj));
-    }
-    __syncwarp();
-  }
-  __syncthreads();
-  
-  if (threadIdx.x == 0) {
-    beta  = Zero();
-    for (Iterator i = 0; i < blockSize; i += VEC) {
-      memcpy((void *)&temp, (void *)&sdata[i], sizeof(sobj));
-      beta  += temp;
-    }
-    memcpy((void *)&sdata[0], (void *)&beta, sizeof(sobj));
-  }
-  __syncthreads();
-}
-
-
-template <class vobj, class sobj, class Iterator>
-__device__ void reduceBlocks(const vobj *g_idata, sobj *g_odata, Iterator n) 
-{
-  constexpr Iterator nsimd = vobj::Nsimd();
-  
-  Iterator blockSize = blockDim.x;
-  
-  // force shared memory alignment
-  extern __shared__ __align__(COALESCE_GRANULARITY) unsigned char shmem_pointer[];
-  // it's not possible to have two extern __shared__ arrays with same name
-  // but different types in different scopes -- need to cast each time
-  sobj *sdata = (sobj *)shmem_pointer;
-  
-  // first level of reduction,
-  // each thread writes result in mySum
-  Iterator tid = threadIdx.x;
-  Iterator i = blockIdx.x*(blockSize*2) + threadIdx.x;
-  Iterator gridSize = blockSize*2*gridDim.x;
-  sobj mySum = Zero();
-  
-  while (i < n) {
-    Iterator lane = i % nsimd;
-    Iterator ss   = i / nsimd;
-    auto tmp = extractLane(lane,g_idata[ss]);
-    sobj tmpD;
-    tmpD=tmp;
-    mySum   +=tmpD;
-    
-    if (i + blockSize < n) {
-      lane = (i+blockSize) % nsimd;
-      ss   = (i+blockSize) / nsimd;
-      tmp = extractLane(lane,g_idata[ss]);
-      tmpD = tmp;
-      mySum += tmpD;
-    }
-    i += gridSize;
-  }
-  
-  // copy mySum to shared memory and perform
-  // reduction for all threads in this block
-  reduceBlock(sdata, mySum, tid);
-  if (tid == 0) g_odata[blockIdx.x] = sdata[0];
-}
-
-template <class vobj, class sobj,class Iterator>
-__global__ void reduceKernel(const vobj *lat, sobj *buffer, Iterator n) {
-  
-  Iterator blockSize = blockDim.x;
-  
-  // perform reduction for this block and
-  // write result to global memory buffer
-  reduceBlocks(lat, buffer, n);
-  
-  if (gridDim.x > 1) {
-    
-    const Iterator tid = threadIdx.x;
-    __shared__ bool amLast;
-    // force shared memory alignment
-    extern __shared__ __align__(COALESCE_GRANULARITY) unsigned char shmem_pointer[];
-    // it's not possible to have two extern __shared__ arrays with same name
-    // but different types in different scopes -- need to cast each time
-    sobj *smem = (sobj *)shmem_pointer;
-    
-    // wait until all outstanding memory instructions in this thread are finished
-    __threadfence();
-    
-    if (tid==0) {
-      unsigned int ticket = atomicInc(&retirementCount, gridDim.x);
-      // true if this block is the last block to be done
-      amLast = (ticket == gridDim.x-1);
-    }
-    
-    // each thread must read the correct value of amLast
-    __syncthreads();
-    
-    if (amLast) {
-      // reduce buffer[0], ..., buffer[gridDim.x-1]
-      Iterator i = tid;
-      sobj mySum = Zero();
-      
-      while (i < gridDim.x) {
-        mySum += buffer[i];
-        i += blockSize;
-      }
-      
-      reduceBlock(smem, mySum, tid);
-      
-      if (tid==0) {
-        buffer[0] = smem[0];
-        // reset count variable
-        retirementCount = 0;
-      }
-    }
-  }
-}
-
-/////////////////////////////////////////////////////////////////////////////////////////////////////////
-// Possibly promote to double and sum
-/////////////////////////////////////////////////////////////////////////////////////////////////////////
-template <class vobj>
-inline typename vobj::scalar_objectD sumD_gpu(const vobj *lat, Integer osites) 
-{
-  typedef typename vobj::scalar_objectD sobj;
-  typedef decltype(lat) Iterator;
-  
-  Integer nsimd= vobj::Nsimd();
-  Integer size = osites*nsimd;
-
-  Integer numThreads, numBlocks;
-  getNumBlocksAndThreads(size, sizeof(sobj), numThreads, numBlocks);
-  Integer smemSize = numThreads * sizeof(sobj);
-
-  Vector<sobj> buffer(numBlocks);
-  sobj *buffer_v = &buffer[0];
-  
-  reduceKernel<<< numBlocks, numThreads, smemSize >>>(lat, buffer_v, size);
-  cudaDeviceSynchronize();
-  
-  cudaError err = cudaGetLastError();
-  if ( cudaSuccess != err ) {
-    printf("Cuda error %s\n",cudaGetErrorString( err ));
-    exit(0);
-  }
-  auto result = buffer_v[0];
-  return result;
-}
-/////////////////////////////////////////////////////////////////////////////////////////////////////////
-// Return as same precision as input performing reduction in double precision though
-/////////////////////////////////////////////////////////////////////////////////////////////////////////
-template <class vobj>
-inline typename vobj::scalar_object sum_gpu(const vobj *lat, Integer osites) 
-{
-  typedef typename vobj::scalar_object sobj;
-  sobj result;
-  result = sumD_gpu(lat,osites);
-  return result;
-}
-
-
-
-NAMESPACE_END(Grid);

Grid/lattice/Lattice_rng.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,8 +24,8 @@
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LATTICE_RNG_H
 #define GRID_LATTICE_RNG_H
 
@@ -41,289 +41,282 @@
 #undef  RNG_FAST_DISCARD
 #endif
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-//////////////////////////////////////////////////////////////
-// Allow the RNG state to be less dense than the fine grid
-//////////////////////////////////////////////////////////////
-inline int RNGfillable(GridBase *coarse,GridBase *fine)
-{
+  //////////////////////////////////////////////////////////////
+  // Allow the RNG state to be less dense than the fine grid
+  //////////////////////////////////////////////////////////////
+  inline int RNGfillable(GridBase *coarse,GridBase *fine)
+  {
 
-  int rngdims = coarse->_ndimension;
+    int rngdims = coarse->_ndimension;
 
-  // trivially extended in higher dims, with locality guaranteeing RNG state is local to node
-  int lowerdims   = fine->_ndimension - coarse->_ndimension;
-  assert(lowerdims >= 0);
-  for(int d=0;d<lowerdims;d++){
-    assert(fine->_simd_layout[d]==1);
-    assert(fine->_processors[d]==1);
+    // trivially extended in higher dims, with locality guaranteeing RNG state is local to node
+    int lowerdims   = fine->_ndimension - coarse->_ndimension;
+    assert(lowerdims >= 0);
+    for(int d=0;d<lowerdims;d++){
+      assert(fine->_simd_layout[d]==1);
+      assert(fine->_processors[d]==1);
+    }
+
+    int multiplicity=1;
+    for(int d=0;d<lowerdims;d++){
+      multiplicity=multiplicity*fine->_rdimensions[d];
+    }
+    // local and global volumes subdivide cleanly after SIMDization
+    for(int d=0;d<rngdims;d++){
+      int fd= d+lowerdims;
+      assert(coarse->_processors[d]  == fine->_processors[fd]);
+      assert(coarse->_simd_layout[d] == fine->_simd_layout[fd]);
+      assert(((fine->_rdimensions[fd] / coarse->_rdimensions[d])* coarse->_rdimensions[d])==fine->_rdimensions[fd]); 
+
+      multiplicity = multiplicity *fine->_rdimensions[fd] / coarse->_rdimensions[d]; 
+    }
+    return multiplicity;
   }
 
-  int multiplicity=1;
-  for(int d=0;d<lowerdims;d++){
-    multiplicity=multiplicity*fine->_rdimensions[d];
-  }
-  // local and global volumes subdivide cleanly after SIMDization
-  for(int d=0;d<rngdims;d++){
-    int fd= d+lowerdims;
-    assert(coarse->_processors[d]  == fine->_processors[fd]);
-    assert(coarse->_simd_layout[d] == fine->_simd_layout[fd]);
-    assert(((fine->_rdimensions[fd] / coarse->_rdimensions[d])* coarse->_rdimensions[d])==fine->_rdimensions[fd]); 
-
-    multiplicity = multiplicity *fine->_rdimensions[fd] / coarse->_rdimensions[d]; 
-  }
-  return multiplicity;
-}
-
   
 // merge of April 11 2017
-// this function is necessary for the LS vectorised field
-inline int RNGfillable_general(GridBase *coarse,GridBase *fine)
-{
-  int rngdims = coarse->_ndimension;
+  // this function is necessary for the LS vectorised field
+  inline int RNGfillable_general(GridBase *coarse,GridBase *fine)
+  {
+    int rngdims = coarse->_ndimension;
     
-  // trivially extended in higher dims, with locality guaranteeing RNG state is local to node
-  int lowerdims   = fine->_ndimension - coarse->_ndimension;  assert(lowerdims >= 0);
-  // assumes that the higher dimensions are not using more processors
-  // all further divisions are local
-  for(int d=0;d<lowerdims;d++) assert(fine->_processors[d]==1);
-  for(int d=0;d<rngdims;d++) assert(coarse->_processors[d] == fine->_processors[d+lowerdims]);
+    // trivially extended in higher dims, with locality guaranteeing RNG state is local to node
+    int lowerdims   = fine->_ndimension - coarse->_ndimension;  assert(lowerdims >= 0);
+    // assumes that the higher dimensions are not using more processors
+    // all further divisions are local
+    for(int d=0;d<lowerdims;d++) assert(fine->_processors[d]==1);
+    for(int d=0;d<rngdims;d++) assert(coarse->_processors[d] == fine->_processors[d+lowerdims]);
 
-  // then divide the number of local sites
-  // check that the total number of sims agree, meanse the iSites are the same
-  assert(fine->Nsimd() == coarse->Nsimd());
+    // then divide the number of local sites
+    // check that the total number of sims agree, meanse the iSites are the same
+    assert(fine->Nsimd() == coarse->Nsimd());
 
-  // check that the two grids divide cleanly
-  assert( (fine->lSites() / coarse->lSites() ) * coarse->lSites() == fine->lSites() );
+    // check that the two grids divide cleanly
+    assert( (fine->lSites() / coarse->lSites() ) * coarse->lSites() == fine->lSites() );
 
-  return fine->lSites() / coarse->lSites();
-}
+    return fine->lSites() / coarse->lSites();
+  }
   
-// real scalars are one component
-template<class scalar,class distribution,class generator> 
-void fillScalar(scalar &s,distribution &dist,generator & gen)
-{
-  s=dist(gen);
-}
-template<class distribution,class generator> 
-void fillScalar(ComplexF &s,distribution &dist, generator &gen)
-{
-  //  s=ComplexF(dist(gen),dist(gen));
-  s.real(dist(gen));
-  s.imag(dist(gen));
-}
-template<class distribution,class generator> 
-void fillScalar(ComplexD &s,distribution &dist,generator &gen)
-{
-  //  s=ComplexD(dist(gen),dist(gen));
-  s.real(dist(gen));
-  s.imag(dist(gen));
-}
+  // real scalars are one component
+  template<class scalar,class distribution,class generator> 
+  void fillScalar(scalar &s,distribution &dist,generator & gen)
+  {
+    s=dist(gen);
+  }
+  template<class distribution,class generator> 
+  void fillScalar(ComplexF &s,distribution &dist, generator &gen)
+  {
+    s=ComplexF(dist(gen),dist(gen));
+  }
+  template<class distribution,class generator> 
+  void fillScalar(ComplexD &s,distribution &dist,generator &gen)
+  {
+    s=ComplexD(dist(gen),dist(gen));
+  }
   
-class GridRNGbase {
-public:
-  // One generator per site.
-  // Uniform and Gaussian distributions from these generators.
+  class GridRNGbase {
+  public:
+    // One generator per site.
+    // Uniform and Gaussian distributions from these generators.
 #ifdef RNG_RANLUX
-  typedef std::ranlux48 RngEngine;
-  typedef uint64_t      RngStateType;
-  static const int RngStateCount = 15;
+    typedef std::ranlux48 RngEngine;
+    typedef uint64_t      RngStateType;
+    static const int RngStateCount = 15;
 #endif 
 #ifdef RNG_MT19937 
-  typedef std::mt19937 RngEngine;
-  typedef uint32_t     RngStateType;
-  static const int     RngStateCount = std::mt19937::state_size;
+    typedef std::mt19937 RngEngine;
+    typedef uint32_t     RngStateType;
+    static const int     RngStateCount = std::mt19937::state_size;
 #endif
 #ifdef RNG_SITMO
-  typedef sitmo::prng_engine 	RngEngine;
-  typedef uint64_t    	RngStateType;
-  static const int    	RngStateCount = 13;
+    typedef sitmo::prng_engine 	RngEngine;
+    typedef uint64_t    	RngStateType;
+    static const int    	RngStateCount = 13;
 #endif
 
-  std::vector<RngEngine>                             _generators;
-  std::vector<std::uniform_real_distribution<RealD> > _uniform;
-  std::vector<std::normal_distribution<RealD> >       _gaussian;
-  std::vector<std::discrete_distribution<int32_t> >   _bernoulli;
-  std::vector<std::uniform_int_distribution<uint32_t> > _uid;
+    std::vector<RngEngine>                             _generators;
+    std::vector<std::uniform_real_distribution<RealD> > _uniform;
+    std::vector<std::normal_distribution<RealD> >       _gaussian;
+    std::vector<std::discrete_distribution<int32_t> >   _bernoulli;
+    std::vector<std::uniform_int_distribution<uint32_t> > _uid;
 
-  ///////////////////////
-  // support for parallel init
-  ///////////////////////
+    ///////////////////////
+    // support for parallel init
+    ///////////////////////
 #ifdef RNG_FAST_DISCARD
-  static void Skip(RngEngine &eng,uint64_t site)
-  {
-    /////////////////////////////////////////////////////////////////////////////////////
-    // Skip by 2^40 elements between successive lattice sites
-    // This goes by 10^12.
-    // Consider quenched updating; likely never exceeding rate of 1000 sweeps
-    // per second on any machine. This gives us of order 10^9 seconds, or 100 years
-    // skip ahead.
-    // For HMC unlikely to go at faster than a solve per second, and 
-    // tens of seconds per trajectory so this is clean in all reasonable cases,
-    // and margin of safety is orders of magnitude.
-    // We could hack Sitmo to skip in the higher order words of state if necessary
+    static void Skip(RngEngine &eng,uint64_t site)
+    {
+      /////////////////////////////////////////////////////////////////////////////////////
+      // Skip by 2^40 elements between successive lattice sites
+      // This goes by 10^12.
+      // Consider quenched updating; likely never exceeding rate of 1000 sweeps
+      // per second on any machine. This gives us of order 10^9 seconds, or 100 years
+      // skip ahead.
+      // For HMC unlikely to go at faster than a solve per second, and 
+      // tens of seconds per trajectory so this is clean in all reasonable cases,
+      // and margin of safety is orders of magnitude.
+      // We could hack Sitmo to skip in the higher order words of state if necessary
       //
       // Replace with 2^30 ; avoid problem on large volumes
       //
-    /////////////////////////////////////////////////////////////////////////////////////
-    //      uint64_t skip = site+1;  //   Old init Skipped then drew.  Checked compat with faster init
-    const int shift = 30;
+      /////////////////////////////////////////////////////////////////////////////////////
+      //      uint64_t skip = site+1;  //   Old init Skipped then drew.  Checked compat with faster init
+      const int shift = 30;
 
-    ////////////////////////////////////////////////////////////////////
-    // Weird compiler bug in Intel 2018.1 under O3 was generating 32bit and not 64 bit left shift.
-    ////////////////////////////////////////////////////////////////////
-    volatile uint64_t skip = site;
+      uint64_t skip = site;
 
-    skip = skip<<shift;
+      skip = skip<<shift;
 
-    assert((skip >> shift)==site); // check for overflow
+      assert((skip >> shift)==site); // check for overflow
 
-    eng.discard(skip);
-    //      std::cout << " Engine  " <<site << " state " <<eng<<std::endl;
-  } 
+      eng.discard(skip);
+      //      std::cout << " Engine  " <<site << " state " <<eng<<std::endl;
+    } 
 #endif
-  static RngEngine Reseed(RngEngine &eng)
-  {
-    std::vector<uint32_t> newseed;
-    std::uniform_int_distribution<uint32_t> uid;
-    return Reseed(eng,newseed,uid);
-  }
-  static RngEngine Reseed(RngEngine &eng,std::vector<uint32_t> & newseed,
-			  std::uniform_int_distribution<uint32_t> &uid)
-  {
-    const int reseeds=4;
+    static RngEngine Reseed(RngEngine &eng)
+    {
+      std::vector<uint32_t> newseed;
+      std::uniform_int_distribution<uint32_t> uid;
+      return Reseed(eng,newseed,uid);
+    }
+    static RngEngine Reseed(RngEngine &eng,std::vector<uint32_t> & newseed,
+			    std::uniform_int_distribution<uint32_t> &uid)
+    {
+      const int reseeds=4;
       
-    newseed.resize(reseeds);
-    for(int i=0;i<reseeds;i++){
-      newseed[i] = uid(eng);
+      newseed.resize(reseeds);
+      for(int i=0;i<reseeds;i++){
+	newseed[i] = uid(eng);
+      }
+      std::seed_seq sseq(newseed.begin(),newseed.end());
+      return RngEngine(sseq);
+    }    
+
+    void GetState(std::vector<RngStateType> & saved,RngEngine &eng) {
+      saved.resize(RngStateCount);
+      std::stringstream ss;
+      ss<<eng;
+      ss.seekg(0,ss.beg);
+      for(int i=0;i<RngStateCount;i++){
+        ss>>saved[i];
+      }
     }
-    std::seed_seq sseq(newseed.begin(),newseed.end());
-    return RngEngine(sseq);
-  }    
-
-  void GetState(std::vector<RngStateType> & saved,RngEngine &eng) {
-    saved.resize(RngStateCount);
-    std::stringstream ss;
-    ss<<eng;
-    ss.seekg(0,ss.beg);
-    for(int i=0;i<RngStateCount;i++){
-      ss>>saved[i];
+    void GetState(std::vector<RngStateType> & saved,int gen) {
+      GetState(saved,_generators[gen]);
     }
-  }
-  void GetState(std::vector<RngStateType> & saved,int gen) {
-    GetState(saved,_generators[gen]);
-  }
-  void SetState(std::vector<RngStateType> & saved,RngEngine &eng){
-    assert(saved.size()==RngStateCount);
-    std::stringstream ss;
-    for(int i=0;i<RngStateCount;i++){
-      ss<< saved[i]<<" ";
+    void SetState(std::vector<RngStateType> & saved,RngEngine &eng){
+      assert(saved.size()==RngStateCount);
+      std::stringstream ss;
+      for(int i=0;i<RngStateCount;i++){
+        ss<< saved[i]<<" ";
+      }
+      ss.seekg(0,ss.beg);
+      ss>>eng;
     }
-    ss.seekg(0,ss.beg);
-    ss>>eng;
-  }
-  void SetState(std::vector<RngStateType> & saved,int gen){
-    SetState(saved,_generators[gen]);
-  }
-  void SetEngine(RngEngine &Eng, int gen){
-    _generators[gen]=Eng;
-  }
-  void GetEngine(RngEngine &Eng, int gen){
-    Eng=_generators[gen];
-  }
-  template<class source> void Seed(source &src, int gen)
-  {
-    _generators[gen] = RngEngine(src);
-  }    
-};
+    void SetState(std::vector<RngStateType> & saved,int gen){
+      SetState(saved,_generators[gen]);
+    }
+    void SetEngine(RngEngine &Eng, int gen){
+      _generators[gen]=Eng;
+    }
+    void GetEngine(RngEngine &Eng, int gen){
+      Eng=_generators[gen];
+    }
+    template<class source> void Seed(source &src, int gen)
+    {
+      _generators[gen] = RngEngine(src);
+    }    
+  };
 
-class GridSerialRNG : public GridRNGbase {
-public:
+  class GridSerialRNG : public GridRNGbase {
+  public:
 
-  GridSerialRNG() : GridRNGbase() {
-    _generators.resize(1);
-    _uniform.resize(1,std::uniform_real_distribution<RealD>{0,1});
-    _gaussian.resize(1,std::normal_distribution<RealD>(0.0,1.0) );
-    _bernoulli.resize(1,std::discrete_distribution<int32_t>{1,1});
-    _uid.resize(1,std::uniform_int_distribution<uint32_t>() );
-  }
+    GridSerialRNG() : GridRNGbase() {
+      _generators.resize(1);
+      _uniform.resize(1,std::uniform_real_distribution<RealD>{0,1});
+      _gaussian.resize(1,std::normal_distribution<RealD>(0.0,1.0) );
+      _bernoulli.resize(1,std::discrete_distribution<int32_t>{1,1});
+      _uid.resize(1,std::uniform_int_distribution<uint32_t>() );
+    }
 
-  template <class sobj,class distribution> inline void fill(sobj &l,std::vector<distribution> &dist){
+    template <class sobj,class distribution> inline void fill(sobj &l,std::vector<distribution> &dist){
 
-    typedef typename sobj::scalar_type scalar_type;
+      typedef typename sobj::scalar_type scalar_type;
  
-    int words = sizeof(sobj)/sizeof(scalar_type);
+      int words = sizeof(sobj)/sizeof(scalar_type);
 
-    scalar_type *buf = (scalar_type *) & l;
+      scalar_type *buf = (scalar_type *) & l;
 
-    dist[0].reset();
-    for(int idx=0;idx<words;idx++){
-      fillScalar(buf[idx],dist[0],_generators[0]);
-    }
+      dist[0].reset();
+      for(int idx=0;idx<words;idx++){
+	fillScalar(buf[idx],dist[0],_generators[0]);
+      }
 
-    CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
+      CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
 
-  }
+    };
 
-  template <class distribution>  inline void fill(ComplexF &l,std::vector<distribution> &dist){
-    dist[0].reset();
-    fillScalar(l,dist[0],_generators[0]);
-    CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
-  }
-  template <class distribution>  inline void fill(ComplexD &l,std::vector<distribution> &dist){
-    dist[0].reset();
-    fillScalar(l,dist[0],_generators[0]);
-    CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
-  }
-  template <class distribution>  inline void fill(RealF &l,std::vector<distribution> &dist){
-    dist[0].reset();
-    fillScalar(l,dist[0],_generators[0]);
-    CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
-  }
-  template <class distribution>  inline void fill(RealD &l,std::vector<distribution> &dist){
-    dist[0].reset();
-    fillScalar(l,dist[0],_generators[0]);
-    CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
-  }
-  // vector fill
-  template <class distribution>  inline void fill(vComplexF &l,std::vector<distribution> &dist){
-    RealF *pointer=(RealF *)&l;
-    dist[0].reset();
-    for(int i=0;i<2*vComplexF::Nsimd();i++){
-      fillScalar(pointer[i],dist[0],_generators[0]);
+    template <class distribution>  inline void fill(ComplexF &l,std::vector<distribution> &dist){
+      dist[0].reset();
+      fillScalar(l,dist[0],_generators[0]);
+      CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
     }
-    CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
-  }
-  template <class distribution>  inline void fill(vComplexD &l,std::vector<distribution> &dist){
-    RealD *pointer=(RealD *)&l;
-    dist[0].reset();
-    for(int i=0;i<2*vComplexD::Nsimd();i++){
-      fillScalar(pointer[i],dist[0],_generators[0]);
+    template <class distribution>  inline void fill(ComplexD &l,std::vector<distribution> &dist){
+      dist[0].reset();
+      fillScalar(l,dist[0],_generators[0]);
+      CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
     }
-    CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
-  }
-  template <class distribution>  inline void fill(vRealF &l,std::vector<distribution> &dist){
-    RealF *pointer=(RealF *)&l;
-    dist[0].reset();
-    for(int i=0;i<vRealF::Nsimd();i++){
-      fillScalar(pointer[i],dist[0],_generators[0]);
+    template <class distribution>  inline void fill(RealF &l,std::vector<distribution> &dist){
+      dist[0].reset();
+      fillScalar(l,dist[0],_generators[0]);
+      CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
     }
-    CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
-  }
-  template <class distribution>  inline void fill(vRealD &l,std::vector<distribution> &dist){
-    RealD *pointer=(RealD *)&l;
-    dist[0].reset();
-    for(int i=0;i<vRealD::Nsimd();i++){
-      fillScalar(pointer[i],dist[0],_generators[0]);
+    template <class distribution>  inline void fill(RealD &l,std::vector<distribution> &dist){
+      dist[0].reset();
+      fillScalar(l,dist[0],_generators[0]);
+      CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
+    }
+    // vector fill
+    template <class distribution>  inline void fill(vComplexF &l,std::vector<distribution> &dist){
+      RealF *pointer=(RealF *)&l;
+      dist[0].reset();
+      for(int i=0;i<2*vComplexF::Nsimd();i++){
+	fillScalar(pointer[i],dist[0],_generators[0]);
+      }
+      CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
+    }
+    template <class distribution>  inline void fill(vComplexD &l,std::vector<distribution> &dist){
+      RealD *pointer=(RealD *)&l;
+      dist[0].reset();
+      for(int i=0;i<2*vComplexD::Nsimd();i++){
+	fillScalar(pointer[i],dist[0],_generators[0]);
+      }
+      CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
+    }
+    template <class distribution>  inline void fill(vRealF &l,std::vector<distribution> &dist){
+      RealF *pointer=(RealF *)&l;
+      dist[0].reset();
+      for(int i=0;i<vRealF::Nsimd();i++){
+	fillScalar(pointer[i],dist[0],_generators[0]);
+      }
+      CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
+    }
+    template <class distribution>  inline void fill(vRealD &l,std::vector<distribution> &dist){
+      RealD *pointer=(RealD *)&l;
+      dist[0].reset();
+      for(int i=0;i<vRealD::Nsimd();i++){
+	fillScalar(pointer[i],dist[0],_generators[0]);
+      }
+      CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
     }
-    CartesianCommunicator::BroadcastWorld(0,(void *)&l,sizeof(l));
-  }
     
-  void SeedFixedIntegers(const std::vector<int> &seeds){
-    CartesianCommunicator::BroadcastWorld(0,(void *)&seeds[0],sizeof(int)*seeds.size());
-    std::seed_seq src(seeds.begin(),seeds.end());
-    Seed(src,0);
-  }
+    void SeedFixedIntegers(const std::vector<int> &seeds){
+      CartesianCommunicator::BroadcastWorld(0,(void *)&seeds[0],sizeof(int)*seeds.size());
+      std::seed_seq src(seeds.begin(),seeds.end());
+      Seed(src,0);
+    }
 
     void SeedUniqueString(const std::string &s){
       std::vector<int> seeds;
@@ -337,189 +330,191 @@ public:
       std::cout << GridLogMessage << "Seed SHA256: " << sha.str() << std::endl;
       SeedFixedIntegers(seeds);
     }
-};
+  };
 
-class GridParallelRNG : public GridRNGbase {
-private:
-  double _time_counter;
-  GridBase *_grid;
-  unsigned int _vol;
+  class GridParallelRNG : public GridRNGbase {
 
-public:
-  GridBase *Grid(void) const { return _grid; }
-  int generator_idx(int os,int is) {
-    return is*_grid->oSites()+os;
-  }
+    double _time_counter;
 
-  GridParallelRNG(GridBase *grid) : GridRNGbase() {
-    _grid = grid;
-    _vol  =_grid->iSites()*_grid->oSites();
+  public:
+    GridBase *_grid;
+    unsigned int _vol;
 
-    _generators.resize(_vol);
-    _uniform.resize(_vol,std::uniform_real_distribution<RealD>{0,1});
-    _gaussian.resize(_vol,std::normal_distribution<RealD>(0.0,1.0) );
-    _bernoulli.resize(_vol,std::discrete_distribution<int32_t>{1,1});
-    _uid.resize(_vol,std::uniform_int_distribution<uint32_t>() );
-  }
+    int generator_idx(int os,int is) {
+      return is*_grid->oSites()+os;
+    }
 
-  template <class vobj,class distribution> inline void fill(Lattice<vobj> &l,std::vector<distribution> &dist){
+    GridParallelRNG(GridBase *grid) : GridRNGbase() {
+      _grid = grid;
+      _vol  =_grid->iSites()*_grid->oSites();
 
-    typedef typename vobj::scalar_object scalar_object;
-    typedef typename vobj::scalar_type scalar_type;
-    typedef typename vobj::vector_type vector_type;
+      _generators.resize(_vol);
+      _uniform.resize(_vol,std::uniform_real_distribution<RealD>{0,1});
+      _gaussian.resize(_vol,std::normal_distribution<RealD>(0.0,1.0) );
+      _bernoulli.resize(_vol,std::discrete_distribution<int32_t>{1,1});
+      _uid.resize(_vol,std::uniform_int_distribution<uint32_t>() );
+    }
 
-    double inner_time_counter = usecond();
+    template <class vobj,class distribution> inline void fill(Lattice<vobj> &l,std::vector<distribution> &dist){
 
-    int multiplicity = RNGfillable_general(_grid, l.Grid()); // l has finer or same grid
-    int Nsimd  = _grid->Nsimd();  // guaranteed to be the same for l.Grid() too
-    int osites = _grid->oSites();  // guaranteed to be <= l.Grid()->oSites() by a factor multiplicity
-    int words  = sizeof(scalar_object) / sizeof(scalar_type);
+      typedef typename vobj::scalar_object scalar_object;
+      typedef typename vobj::scalar_type scalar_type;
+      typedef typename vobj::vector_type vector_type;
 
-    auto l_v = l.View();
-    thread_for( ss, osites, {
-      ExtractBuffer<scalar_object> buf(Nsimd);
-      for (int m = 0; m < multiplicity; m++) {  // Draw from same generator multiplicity times
+      double inner_time_counter = usecond();
 
-	int sm = multiplicity * ss + m;  // Maps the generator site to the fine site
+      int multiplicity = RNGfillable_general(_grid, l._grid); // l has finer or same grid
+      int Nsimd  = _grid->Nsimd();  // guaranteed to be the same for l._grid too
+      int osites = _grid->oSites();  // guaranteed to be <= l._grid->oSites() by a factor multiplicity
+      int words  = sizeof(scalar_object) / sizeof(scalar_type);
 
-	for (int si = 0; si < Nsimd; si++) {
+      parallel_for(int ss=0;ss<osites;ss++){
+        std::vector<scalar_object> buf(Nsimd);
+        for (int m = 0; m < multiplicity; m++) {  // Draw from same generator multiplicity times
+
+          int sm = multiplicity * ss + m;  // Maps the generator site to the fine site
+
+          for (int si = 0; si < Nsimd; si++) {
             
-	  int gdx = generator_idx(ss, si);  // index of generator state
-	  scalar_type *pointer = (scalar_type *)&buf[si];
-	  dist[gdx].reset();
-	  for (int idx = 0; idx < words; idx++) 
-	    fillScalar(pointer[idx], dist[gdx], _generators[gdx]);
-	}
-	// merge into SIMD lanes, FIXME suboptimal implementation
-	merge(l_v[sm], buf);
+            int gdx = generator_idx(ss, si);  // index of generator state
+            scalar_type *pointer = (scalar_type *)&buf[si];
+            dist[gdx].reset();
+            for (int idx = 0; idx < words; idx++) 
+              fillScalar(pointer[idx], dist[gdx], _generators[gdx]);
+          }
+          // merge into SIMD lanes, FIXME suboptimal implementation
+          merge(l._odata[sm], buf);
+        }
       }
-      });
-    //    });
 
-    _time_counter += usecond()- inner_time_counter;
-  }
+      _time_counter += usecond()- inner_time_counter;
+    };
 
     void SeedUniqueString(const std::string &s){
       std::vector<int> seeds;
+      std::stringstream sha;
       seeds = GridChecksum::sha256_seeds(s);
+      for(int i=0;i<seeds.size();i++) { 
+        sha << std::hex << seeds[i];
+      }
       std::cout << GridLogMessage << "Intialising parallel RNG with unique string '" 
                 << s << "'" << std::endl;
-      std::cout << GridLogMessage << "Seed SHA256: " << GridChecksum::sha256_string(seeds) << std::endl;
+      std::cout << GridLogMessage << "Seed SHA256: " << sha.str() << std::endl;
       SeedFixedIntegers(seeds);
     }
-  void SeedFixedIntegers(const std::vector<int> &seeds){
+    void SeedFixedIntegers(const std::vector<int> &seeds){
 
-    // Everyone generates the same seed_seq based on input seeds
-    CartesianCommunicator::BroadcastWorld(0,(void *)&seeds[0],sizeof(int)*seeds.size());
+      // Everyone generates the same seed_seq based on input seeds
+      CartesianCommunicator::BroadcastWorld(0,(void *)&seeds[0],sizeof(int)*seeds.size());
 
-    std::seed_seq source(seeds.begin(),seeds.end());
+      std::seed_seq source(seeds.begin(),seeds.end());
 
-    RngEngine master_engine(source);
+      RngEngine master_engine(source);
 
 #ifdef RNG_FAST_DISCARD
-    ////////////////////////////////////////////////
-    // Skip ahead through a single stream.
-    // Applicable to SITMO and other has based/crypto RNGs
-    // Should be applicable to Mersenne Twister, but the C++11
-    // MT implementation does not implement fast discard even though
-    // in principle this is possible
-    ////////////////////////////////////////////////
+      ////////////////////////////////////////////////
+      // Skip ahead through a single stream.
+      // Applicable to SITMO and other has based/crypto RNGs
+      // Should be applicable to Mersenne Twister, but the C++11
+      // MT implementation does not implement fast discard even though
+      // in principle this is possible
+      ////////////////////////////////////////////////
+
+      // Everybody loops over global volume.
+      parallel_for(int gidx=0;gidx<_grid->_gsites;gidx++){
 
-    // Everybody loops over global volume.
-    thread_for( gidx, _grid->_gsites, {
 	// Where is it?
-	int rank;
-	int o_idx;
-	int i_idx;
+	int rank,o_idx,i_idx;
+	std::vector<int> gcoor;
 
-	Coordinate gcoor;
 	_grid->GlobalIndexToGlobalCoor(gidx,gcoor);
 	_grid->GlobalCoorToRankIndex(rank,o_idx,i_idx,gcoor);
-	
+
 	// If this is one of mine we take it
 	if( rank == _grid->ThisRank() ){
 	  int l_idx=generator_idx(o_idx,i_idx);
 	  _generators[l_idx] = master_engine;
 	  Skip(_generators[l_idx],gidx); // Skip to next RNG sequence
 	}
-    });
+
+      }
 #else 
-    ////////////////////////////////////////////////////////////////
-    // Machine and thread decomposition dependent seeding is efficient
-    // and maximally parallel; but NOT reproducible from machine to machine. 
-    // Not ideal, but fastest way to reseed all nodes.
-    ////////////////////////////////////////////////////////////////
-    {
-      // Obtain one Reseed per processor
-      int Nproc = _grid->ProcessorCount();
-      std::vector<RngEngine> seeders(Nproc);
-      int me= _grid->ThisRank();
-      for(int p=0;p<Nproc;p++){
-	seeders[p] = Reseed(master_engine);
-      }
-      master_engine = seeders[me];
-    }
-
-    {
-      // Obtain one reseeded generator per thread
-      int Nthread = GridThread::GetThreads();
-      std::vector<RngEngine> seeders(Nthread);
-      for(int t=0;t<Nthread;t++){
-	seeders[t] = Reseed(master_engine);
+      ////////////////////////////////////////////////////////////////
+      // Machine and thread decomposition dependent seeding is efficient
+      // and maximally parallel; but NOT reproducible from machine to machine. 
+      // Not ideal, but fastest way to reseed all nodes.
+      ////////////////////////////////////////////////////////////////
+      {
+	// Obtain one Reseed per processor
+	int Nproc = _grid->ProcessorCount();
+	std::vector<RngEngine> seeders(Nproc);
+	int me= _grid->ThisRank();
+	for(int p=0;p<Nproc;p++){
+	  seeders[p] = Reseed(master_engine);
+	}
+	master_engine = seeders[me];
       }
 
-      thread_for( t, Nthread, {
-	// set up one per local site in threaded fashion
-	std::vector<uint32_t> newseeds;
-	std::uniform_int_distribution<uint32_t> uid;	
-	for(int l=0;l<_grid->lSites();l++) {
-	  if ( (l%Nthread)==t ) {
-	    _generators[l] = Reseed(seeders[t],newseeds,uid);
+      {
+	// Obtain one reseeded generator per thread
+	int Nthread = GridThread::GetThreads();
+	std::vector<RngEngine> seeders(Nthread);
+	for(int t=0;t<Nthread;t++){
+	  seeders[t] = Reseed(master_engine);
+	}
+
+	parallel_for(int t=0;t<Nthread;t++) {
+	  // set up one per local site in threaded fashion
+	  std::vector<uint32_t> newseeds;
+	  std::uniform_int_distribution<uint32_t> uid;	
+	  for(int l=0;l<_grid->lSites();l++) {
+	    if ( (l%Nthread)==t ) {
+	      _generators[l] = Reseed(seeders[t],newseeds,uid);
+	    }
 	  }
 	}
-      });
-    }
+      }
 #endif
-  }
-
-  void Report(){
-    std::cout << GridLogMessage << "Time spent in the fill() routine by GridParallelRNG: "<< _time_counter/1e3 << " ms" << std::endl;
-  }
-
-
-  ////////////////////////////////////////////////////////////////////////
-  // Support for rigorous test of RNG's
-  // Return uniform random uint32_t from requested site generator
-  ////////////////////////////////////////////////////////////////////////
-  uint32_t GlobalU01(int gsite){
-
-    uint32_t the_number;
-    // who
-    int rank,o_idx,i_idx;
-    Coordinate gcoor;
-    _grid->GlobalIndexToGlobalCoor(gsite,gcoor);
-    _grid->GlobalCoorToRankIndex(rank,o_idx,i_idx,gcoor);
-
-    // draw
-    int l_idx=generator_idx(o_idx,i_idx);
-    if( rank == _grid->ThisRank() ){
-      the_number = _uid[l_idx](_generators[l_idx]);
     }
+
+    void Report(){
+      std::cout << GridLogMessage << "Time spent in the fill() routine by GridParallelRNG: "<< _time_counter/1e3 << " ms" << std::endl;
+    }
+
+
+    ////////////////////////////////////////////////////////////////////////
+    // Support for rigorous test of RNG's
+    // Return uniform random uint32_t from requested site generator
+    ////////////////////////////////////////////////////////////////////////
+    uint32_t GlobalU01(int gsite){
+
+      uint32_t the_number;
+      // who
+      std::vector<int> gcoor;
+      int rank,o_idx,i_idx;
+      _grid->GlobalIndexToGlobalCoor(gsite,gcoor);
+      _grid->GlobalCoorToRankIndex(rank,o_idx,i_idx,gcoor);
+
+      // draw
+      int l_idx=generator_idx(o_idx,i_idx);
+      if( rank == _grid->ThisRank() ){
+	the_number = _uid[l_idx](_generators[l_idx]);
+      }
       
-    // share & return
-    _grid->Broadcast(rank,(void *)&the_number,sizeof(the_number));
-    return the_number;
-  }
+      // share & return
+      _grid->Broadcast(rank,(void *)&the_number,sizeof(the_number));
+      return the_number;
+    }
 
-};
+  };
 
-template <class vobj> inline void random(GridParallelRNG &rng,Lattice<vobj> &l)   { rng.fill(l,rng._uniform);  }
-template <class vobj> inline void gaussian(GridParallelRNG &rng,Lattice<vobj> &l) { rng.fill(l,rng._gaussian); }
-template <class vobj> inline void bernoulli(GridParallelRNG &rng,Lattice<vobj> &l){ rng.fill(l,rng._bernoulli);}
+  template <class vobj> inline void random(GridParallelRNG &rng,Lattice<vobj> &l)   { rng.fill(l,rng._uniform);  }
+  template <class vobj> inline void gaussian(GridParallelRNG &rng,Lattice<vobj> &l) { rng.fill(l,rng._gaussian); }
+  template <class vobj> inline void bernoulli(GridParallelRNG &rng,Lattice<vobj> &l){ rng.fill(l,rng._bernoulli);}
 
-template <class sobj> inline void random(GridSerialRNG &rng,sobj &l)   { rng.fill(l,rng._uniform  ); }
-template <class sobj> inline void gaussian(GridSerialRNG &rng,sobj &l) { rng.fill(l,rng._gaussian ); }
-template <class sobj> inline void bernoulli(GridSerialRNG &rng,sobj &l){ rng.fill(l,rng._bernoulli); }
+  template <class sobj> inline void random(GridSerialRNG &rng,sobj &l)   { rng.fill(l,rng._uniform  ); }
+  template <class sobj> inline void gaussian(GridSerialRNG &rng,sobj &l) { rng.fill(l,rng._gaussian ); }
+  template <class sobj> inline void bernoulli(GridSerialRNG &rng,sobj &l){ rng.fill(l,rng._bernoulli); }
 
-NAMESPACE_END(Grid);
+}
 #endif

Grid/lattice/Lattice_trace.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -23,8 +23,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LATTICE_TRACE_H
 #define GRID_LATTICE_TRACE_H
 
@@ -32,40 +32,36 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 // Tracing, transposing, peeking, poking
 ///////////////////////////////////////////////
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// Trace
-////////////////////////////////////////////////////////////////////////////////////////////////////
-/*
-template<class vobj>
-inline auto trace(const Lattice<vobj> &lhs)  -> Lattice<decltype(trace(vobj()))>
-{
-  Lattice<decltype(trace(vobj()))> ret(lhs.Grid());
-  auto ret_v = ret.View();
-  auto lhs_v = lhs.View();
-  accelerator_for( ss, lhs_v.size(), vobj::Nsimd(), {
-    coalescedWrite(ret_v[ss], trace(lhs_v(ss)));
-  });
-  return ret;
-};
-*/
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+    // Trace
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+    template<class vobj>
+    inline auto trace(const Lattice<vobj> &lhs)
+      -> Lattice<decltype(trace(lhs._odata[0]))>
+    {
+      Lattice<decltype(trace(lhs._odata[0]))> ret(lhs._grid);
+      parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+            ret._odata[ss] = trace(lhs._odata[ss]);
+        }
+        return ret;
+    };
     
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// Trace Index level dependent operation
-////////////////////////////////////////////////////////////////////////////////////////////////////
-template<int Index,class vobj>
-inline auto TraceIndex(const Lattice<vobj> &lhs) -> Lattice<decltype(traceIndex<Index>(vobj()))>
-{
-  Lattice<decltype(traceIndex<Index>(vobj()))> ret(lhs.Grid());
-  auto ret_v = ret.View();
-  auto lhs_v = lhs.View();
-  accelerator_for( ss, lhs_v.size(), vobj::Nsimd(), {
-    coalescedWrite(ret_v[ss], traceIndex<Index>(lhs_v(ss)));
-  });
-  return ret;
-};
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+    // Trace Index level dependent operation
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+    template<int Index,class vobj>
+    inline auto TraceIndex(const Lattice<vobj> &lhs) -> Lattice<decltype(traceIndex<Index>(lhs._odata[0]))>
+    {
+      Lattice<decltype(traceIndex<Index>(lhs._odata[0]))> ret(lhs._grid);
+      parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+	ret._odata[ss] = traceIndex<Index>(lhs._odata[ss]);
+      }
+      return ret;
+    };
 
-NAMESPACE_END(Grid);
+
+}
 #endif
 

Grid/lattice/Lattice_transpose.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -24,8 +24,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LATTICE_TRANSPOSE_H
 #define GRID_LATTICE_TRANSPOSE_H
 
@@ -33,38 +33,31 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 // Transpose
 ///////////////////////////////////////////////
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// Transpose
-////////////////////////////////////////////////////////////////////////////////////////////////////
-/*
-template<class vobj>
-inline Lattice<vobj> transpose(const Lattice<vobj> &lhs){
-  Lattice<vobj> ret(lhs.Grid());
-  auto ret_v = ret.View();
-  auto lhs_v = lhs.View();
-  accelerator_for(ss,lhs_v.size(),vobj::Nsimd(),{
-    coalescedWrite(ret_v[ss], transpose(lhs_v(ss)));
-  });
-  return ret;
-};
-*/    
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// Index level dependent transpose
-////////////////////////////////////////////////////////////////////////////////////////////////////
-template<int Index,class vobj>
-inline auto TransposeIndex(const Lattice<vobj> &lhs) -> Lattice<decltype(transposeIndex<Index>(vobj()))>
-{
-  Lattice<decltype(transposeIndex<Index>(vobj()))> ret(lhs.Grid());
-  auto ret_v = ret.View();
-  auto lhs_v = lhs.View();
-  accelerator_for(ss,lhs_v.size(),vobj::Nsimd(),{
-    coalescedWrite(ret_v[ss] , transposeIndex<Index>(lhs_v(ss)));
-  });
-  return ret;
-};
-
-NAMESPACE_END(Grid);
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+    // Transpose
+    ////////////////////////////////////////////////////////////////////////////////////////////////////
+  template<class vobj>
+    inline Lattice<vobj> transpose(const Lattice<vobj> &lhs){
+    Lattice<vobj> ret(lhs._grid);
+    parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+      ret._odata[ss] = transpose(lhs._odata[ss]);
+    }
+    return ret;
+  };
+    
+  ////////////////////////////////////////////////////////////////////////////////////////////////////
+  // Index level dependent transpose
+  ////////////////////////////////////////////////////////////////////////////////////////////////////
+  template<int Index,class vobj>
+    inline auto TransposeIndex(const Lattice<vobj> &lhs) -> Lattice<decltype(transposeIndex<Index>(lhs._odata[0]))>
+  {
+    Lattice<decltype(transposeIndex<Index>(lhs._odata[0]))> ret(lhs._grid);
+    parallel_for(int ss=0;ss<lhs._grid->oSites();ss++){
+      ret._odata[ss] = transposeIndex<Index>(lhs._odata[ss]);
+    }
+    return ret;
+  };
+}
 #endif

Grid/lattice/Lattice_unary.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -26,55 +26,59 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 #ifndef GRID_LATTICE_UNARY_H
 #define GRID_LATTICE_UNARY_H
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-template<class obj> Lattice<obj> pow(const Lattice<obj> &rhs_i,RealD y){
-  Lattice<obj> ret_i(rhs_i.Grid());
-  auto rhs = rhs_i.View();
-  auto ret = ret_i.View();
-  ret.Checkerboard() = rhs.Checkerboard();
-  accelerator_for(ss,rhs.size(),1,{
-      ret[ss]=pow(rhs[ss],y);
-  });
-  return ret_i;
-}
-template<class obj> Lattice<obj> mod(const Lattice<obj> &rhs_i,Integer y){
-  Lattice<obj> ret_i(rhs_i.Grid());
-  auto rhs = rhs_i.View();
-  auto ret = ret_i.View();
-  ret.Checkerboard() = rhs.Checkerboard();
-  accelerator_for(ss,rhs.size(),obj::Nsimd(),{
-    coalescedWrite(ret[ss],mod(rhs(ss),y));
-  });
-  return ret_i;
-}
+  template<class obj> Lattice<obj> pow(const Lattice<obj> &rhs,RealD y){
+    Lattice<obj> ret(rhs._grid);
+    ret.checkerboard = rhs.checkerboard;
+    conformable(ret,rhs);
+    parallel_for(int ss=0;ss<rhs._grid->oSites();ss++){
+      ret._odata[ss]=pow(rhs._odata[ss],y);
+    }
+    return ret;
+  }
+  template<class obj> Lattice<obj> mod(const Lattice<obj> &rhs,Integer y){
+    Lattice<obj> ret(rhs._grid);
+    ret.checkerboard = rhs.checkerboard;
+    conformable(ret,rhs);
+    parallel_for(int ss=0;ss<rhs._grid->oSites();ss++){
+      ret._odata[ss]=mod(rhs._odata[ss],y);
+    }
+    return ret;
+  }
 
-template<class obj> Lattice<obj> div(const Lattice<obj> &rhs_i,Integer y){
-  Lattice<obj> ret_i(rhs_i.Grid());
-  auto ret = ret_i.View();
-  auto rhs = rhs_i.View();
-  ret.Checkerboard() = rhs_i.Checkerboard();
-  accelerator_for(ss,rhs.size(),obj::Nsimd(),{
-    coalescedWrite(ret[ss],div(rhs(ss),y));
-  });
-  return ret_i;
-}
+  template<class obj> Lattice<obj> div(const Lattice<obj> &rhs,Integer y){
+    Lattice<obj> ret(rhs._grid);
+    ret.checkerboard = rhs.checkerboard;
+    conformable(ret,rhs);
+    parallel_for(int ss=0;ss<rhs._grid->oSites();ss++){
+      ret._odata[ss]=div(rhs._odata[ss],y);
+    }
+    return ret;
+  }
 
-template<class obj> Lattice<obj> expMat(const Lattice<obj> &rhs_i, RealD alpha, Integer Nexp = DEFAULT_MAT_EXP){
-  Lattice<obj> ret_i(rhs_i.Grid());
-  auto rhs = rhs_i.View();
-  auto ret = ret_i.View();
-  ret.Checkerboard() = rhs.Checkerboard();
-  accelerator_for(ss,rhs.size(),obj::Nsimd(),{
-    coalescedWrite(ret[ss],Exponentiate(rhs(ss),alpha, Nexp));
-  });
-  return ret_i;
-}
+  template<class obj> Lattice<obj> expMat(const Lattice<obj> &rhs, RealD alpha, Integer Nexp = DEFAULT_MAT_EXP){
+    Lattice<obj> ret(rhs._grid);
+    ret.checkerboard = rhs.checkerboard;
+    conformable(ret,rhs);
+    parallel_for(int ss=0;ss<rhs._grid->oSites();ss++){
+      ret._odata[ss]=Exponentiate(rhs._odata[ss],alpha, Nexp);
+    }
 
-NAMESPACE_END(Grid);
+    return ret;
+
+    
+    
+
+    
+  }
+
+
+
+}
 #endif

Grid/log/Log.cc

@@ -28,27 +28,27 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 See the full license in the file "LICENSE" in the top level distribution
 directory
 *************************************************************************************/
-			   /*  END LEGAL */
+/*  END LEGAL */
 #include <Grid/GridCore.h>
 #include <Grid/util/CompilerCompatible.h>
 
 #include <cxxabi.h>
 #include <memory>
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
-std::string demangle(const char* name) {
+  std::string demangle(const char* name) {
     
-  int status = -4; // some arbitrary value to eliminate the compiler warning
+    int status = -4; // some arbitrary value to eliminate the compiler warning
     
-  // enable c++11 by passing the flag -std=c++11 to g++
-  std::unique_ptr<char, void(*)(void*)> res {
-    abi::__cxa_demangle(name, NULL, NULL, &status),
-      std::free
-      };
+    // enable c++11 by passing the flag -std=c++11 to g++
+    std::unique_ptr<char, void(*)(void*)> res {
+      abi::__cxa_demangle(name, NULL, NULL, &status),
+	std::free
+	};
     
-  return (status==0) ? res.get() : name ;
-}
+    return (status==0) ? res.get() : name ;
+  }
   
 GridStopWatch Logger::GlobalStopWatch;
 int Logger::timestamp;
@@ -59,7 +59,6 @@ void GridLogTimestamp(int on){
 }
 
 Colours GridLogColours(0);
-GridLogger GridLogMG     (1, "MG"    , GridLogColours, "NORMAL");
 GridLogger GridLogIRL    (1, "IRL"   , GridLogColours, "NORMAL");
 GridLogger GridLogSolver (1, "Solver", GridLogColours, "NORMAL");
 GridLogger GridLogError  (1, "Error" , GridLogColours, "RED");
@@ -77,18 +76,19 @@ void GridLogConfigure(std::vector<std::string> &logstreams) {
   GridLogIterative.Active(0);
   GridLogDebug.Active(0);
   GridLogPerformance.Active(0);
-  GridLogIntegrator.Active(1);
+  GridLogIntegrator.Active(0);
   GridLogColours.Active(0);
 
   for (int i = 0; i < logstreams.size(); i++) {
-    if (logstreams[i] == std::string("Error"))       GridLogError.Active(1);
-    if (logstreams[i] == std::string("Warning"))     GridLogWarning.Active(1);
-    if (logstreams[i] == std::string("NoMessage"))   GridLogMessage.Active(0);
-    if (logstreams[i] == std::string("Iterative"))   GridLogIterative.Active(1);
-    if (logstreams[i] == std::string("Debug"))       GridLogDebug.Active(1);
-    if (logstreams[i] == std::string("Performance")) GridLogPerformance.Active(1);
-    if (logstreams[i] == std::string("Integrator"))  GridLogIntegrator.Active(1);
-    if (logstreams[i] == std::string("Colours"))     GridLogColours.Active(1);
+    if (logstreams[i] == std::string("Error")) GridLogError.Active(1);
+    if (logstreams[i] == std::string("Warning")) GridLogWarning.Active(1);
+    if (logstreams[i] == std::string("NoMessage")) GridLogMessage.Active(0);
+    if (logstreams[i] == std::string("Iterative")) GridLogIterative.Active(1);
+    if (logstreams[i] == std::string("Debug")) GridLogDebug.Active(1);
+    if (logstreams[i] == std::string("Performance"))
+      GridLogPerformance.Active(1);
+    if (logstreams[i] == std::string("Integrator")) GridLogIntegrator.Active(1);
+    if (logstreams[i] == std::string("Colours")) GridLogColours.Active(1);
   }
 }
 
@@ -109,9 +109,8 @@ void Grid_quiesce_nodes(void) {
 }
 
 void Grid_unquiesce_nodes(void) {
-#if defined(GRID_COMMS_MPI) || defined(GRID_COMMS_MPI3) || defined(GRID_COMMS_MPIT)
+#ifdef GRID_COMMS_MPI
   std::cout.clear();
 #endif
 }
-NAMESPACE_END(Grid);
-
+}

Grid/log/Log.h

@@ -1,4 +1,4 @@
-/*************************************************************************************
+    /*************************************************************************************
 
     Grid physics library, www.github.com/paboyle/Grid 
 
@@ -25,8 +25,8 @@
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
     See the full license in the file "LICENSE" in the top level distribution directory
-*************************************************************************************/
-/*  END LEGAL */
+    *************************************************************************************/
+    /*  END LEGAL */
 
 #include <map>
 
@@ -37,12 +37,13 @@
 #include <execinfo.h>
 #endif
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid {
 
 //////////////////////////////////////////////////////////////////////////////////////////////////
 // Dress the output; use std::chrono for time stamping via the StopWatch class
 //////////////////////////////////////////////////////////////////////////////////////////////////
 
+
 class Colours{
 protected:
   bool is_active;
@@ -56,15 +57,15 @@ public:
   void Active(bool activate){
     is_active=activate;
     if (is_active){
-      colour["BLACK"]  ="\033[30m";
-      colour["RED"]    ="\033[31m";
-      colour["GREEN"]  ="\033[32m";
-      colour["YELLOW"] ="\033[33m";
-      colour["BLUE"]   ="\033[34m";
-      colour["PURPLE"] ="\033[35m";
-      colour["CYAN"]   ="\033[36m";
-      colour["WHITE"]  ="\033[37m";
-      colour["NORMAL"] ="\033[0;39m";
+     colour["BLACK"]  ="\033[30m";
+     colour["RED"]    ="\033[31m";
+     colour["GREEN"]  ="\033[32m";
+     colour["YELLOW"] ="\033[33m";
+     colour["BLUE"]   ="\033[34m";
+     colour["PURPLE"] ="\033[35m";
+     colour["CYAN"]   ="\033[36m";
+     colour["WHITE"]  ="\033[37m";
+     colour["NORMAL"] ="\033[0;39m";
     } else {
       colour["BLACK"] ="";
       colour["RED"]   ="";
@@ -101,14 +102,14 @@ public:
   std::string colour() {return Painter.colour[COLOUR];}
 
   Logger(std::string topNm, int on, std::string nm, Colours& col_class, std::string col)  : active(on),
-											    name(nm),
-											    topName(topNm),
-											    Painter(col_class),
-											    timing_mode(0),
-											    COLOUR(col) 
-  {
-    StopWatch = & GlobalStopWatch;
-  };
+    name(nm),
+    topName(topNm),
+    Painter(col_class),
+    timing_mode(0),
+    COLOUR(col) 
+    {
+      StopWatch = & GlobalStopWatch;
+    };
   
   void Active(int on) {active = on;};
   int  isActive(void) {return active;};
@@ -145,11 +146,9 @@ public:
       if ( log.timestamp ) {
 	log.StopWatch->Stop();
 	GridTime now = log.StopWatch->Elapsed();
-	
 	if ( log.timing_mode==1 ) log.StopWatch->Reset();
 	log.StopWatch->Start();
-	stream << log.evidence()
-	       << now	       << log.background() << " : " ;
+	stream << log.evidence()<< std::setw(6)<<now << log.background() << " : " ;
       }
       stream << log.colour();
       return stream;
@@ -163,12 +162,11 @@ public:
 class GridLogger: public Logger {
 public:
   GridLogger(int on, std::string nm, Colours&col_class, std::string col_key = "NORMAL"):
-    Logger("Grid", on, nm, col_class, col_key){};
+  Logger("Grid", on, nm, col_class, col_key){};
 };
 
 void GridLogConfigure(std::vector<std::string> &logstreams);
 
-extern GridLogger GridLogMG;
 extern GridLogger GridLogIRL;
 extern GridLogger GridLogSolver;
 extern GridLogger GridLogError;
@@ -180,39 +178,39 @@ extern GridLogger GridLogIterative  ;
 extern GridLogger GridLogIntegrator  ;
 extern Colours    GridLogColours;
 
-std::string demangle(const char* name) ;
+ std::string demangle(const char* name) ;
 
 #define _NBACKTRACE (256)
 extern void * Grid_backtrace_buffer[_NBACKTRACE];
 
-#define BACKTRACEFILE() {						\
-    char string[20];							\
-    std::sprintf(string,"backtrace.%d",CartesianCommunicator::RankWorld()); \
-    std::FILE * fp = std::fopen(string,"w");				\
-    BACKTRACEFP(fp)							\
-      std::fclose(fp);							\
-  }
+#define BACKTRACEFILE() {\
+char string[20];					\
+std::sprintf(string,"backtrace.%d",CartesianCommunicator::RankWorld()); \
+std::FILE * fp = std::fopen(string,"w");				\
+BACKTRACEFP(fp)\
+std::fclose(fp);	    \
+}
 
 
 #ifdef HAVE_EXECINFO_H
-#define BACKTRACEFP(fp) {						\
-    int symbols    = backtrace        (Grid_backtrace_buffer,_NBACKTRACE); \
-    char **strings = backtrace_symbols(Grid_backtrace_buffer,symbols);	\
-    for (int i = 0; i < symbols; i++){					\
-      std::fprintf (fp,"BackTrace Strings: %d %s\n",i, demangle(strings[i]).c_str()); std::fflush(fp); \
-    }									\
-  }
+#define BACKTRACEFP(fp) { \
+int symbols    = backtrace        (Grid_backtrace_buffer,_NBACKTRACE);\
+char **strings = backtrace_symbols(Grid_backtrace_buffer,symbols);\
+for (int i = 0; i < symbols; i++){\
+  std::fprintf (fp,"BackTrace Strings: %d %s\n",i, demangle(strings[i]).c_str()); std::fflush(fp); \
+}\
+}
 #else 
-#define BACKTRACEFP(fp) {						\
-    std::fprintf (fp,"BT %d %lx\n",0, __builtin_return_address(0)); std::fflush(fp); \
-    std::fprintf (fp,"BT %d %lx\n",1, __builtin_return_address(1)); std::fflush(fp); \
-    std::fprintf (fp,"BT %d %lx\n",2, __builtin_return_address(2)); std::fflush(fp); \
-    std::fprintf (fp,"BT %d %lx\n",3, __builtin_return_address(3)); std::fflush(fp); \
-  }
+#define BACKTRACEFP(fp) { \
+std::fprintf (fp,"BT %d %lx\n",0, __builtin_return_address(0)); std::fflush(fp); \
+std::fprintf (fp,"BT %d %lx\n",1, __builtin_return_address(1)); std::fflush(fp); \
+std::fprintf (fp,"BT %d %lx\n",2, __builtin_return_address(2)); std::fflush(fp); \
+std::fprintf (fp,"BT %d %lx\n",3, __builtin_return_address(3)); std::fflush(fp); \
+}
 #endif
 
 #define BACKTRACE() BACKTRACEFP(stdout) 
 
-NAMESPACE_END(Grid);
 
+}
 #endif

Grid/parallelIO/BinaryIO.cc

@@ -1,3 +0,0 @@
-#include <Grid/GridCore.h>
-
-int Grid::BinaryIO::latticeWriteMaxRetry = -1;

Grid/parallelIO/BinaryIO.h

@@ -26,7 +26,8 @@
     See the full license in the file "LICENSE" in the top level distribution directory
     *************************************************************************************/
     /*  END LEGAL */
-#pragma once
+#ifndef GRID_BINARY_IO_H
+#define GRID_BINARY_IO_H
 
 #if defined(GRID_COMMS_MPI) || defined(GRID_COMMS_MPI3) || defined(GRID_COMMS_MPIT) 
 #define USE_MPI_IO
@@ -41,7 +42,8 @@
 #include <arpa/inet.h>
 #include <algorithm>
 
-NAMESPACE_BEGIN(Grid);
+namespace Grid { 
+
 
 /////////////////////////////////////////////////////////////////////////////////
 // Byte reversal garbage
@@ -79,7 +81,6 @@ inline void removeWhitespace(std::string &key)
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 class BinaryIO {
  public:
-  static int latticeWriteMaxRetry;
 
   /////////////////////////////////////////////////////////////////////////////
   // more byte manipulation helpers
@@ -89,7 +90,7 @@ class BinaryIO {
   {
     typedef typename vobj::scalar_object sobj;
 
-    GridBase *grid = lat.Grid();
+    GridBase *grid = lat._grid;
     uint64_t lsites = grid->lSites();
 
     std::vector<sobj> scalardata(lsites); 
@@ -109,20 +110,21 @@ class BinaryIO {
       lsites = 1;
     }
 
-    thread_region
+PARALLEL_REGION
     {
       uint32_t nersc_csum_thr = 0;
 
-      thread_for_in_region( local_site, lsites, 
+PARALLEL_FOR_LOOP_INTERN
+      for (uint64_t local_site = 0; local_site < lsites; local_site++)
       {
         uint32_t *site_buf = (uint32_t *)&fbuf[local_site];
         for (uint64_t j = 0; j < size32; j++)
         {
           nersc_csum_thr = nersc_csum_thr + site_buf[j];
         }
-      });
+      }
 
-      thread_critical
+PARALLEL_CRITICAL
       {
         nersc_csum += nersc_csum_thr;
       }
@@ -131,25 +133,28 @@ class BinaryIO {
 
   template<class fobj> static inline void ScidacChecksum(GridBase *grid,std::vector<fobj> &fbuf,uint32_t &scidac_csuma,uint32_t &scidac_csumb)
   {
+    const uint64_t size32 = sizeof(fobj)/sizeof(uint32_t);
+
+
     int nd = grid->_ndimension;
 
     uint64_t lsites              =grid->lSites();
     if (fbuf.size()==1) {
       lsites=1;
     }
-    Coordinate local_vol   =grid->LocalDimensions();
-    Coordinate local_start =grid->LocalStarts();
-    Coordinate global_vol  =grid->FullDimensions();
+    std::vector<int> local_vol   =grid->LocalDimensions();
+    std::vector<int> local_start =grid->LocalStarts();
+    std::vector<int> global_vol  =grid->FullDimensions();
 
-    thread_region
+PARALLEL_REGION
     { 
-      Coordinate coor(nd);
+      std::vector<int> coor(nd);
       uint32_t scidac_csuma_thr=0;
       uint32_t scidac_csumb_thr=0;
       uint32_t site_crc=0;
 
-      thread_for_in_region( local_site, lsites, 
-      {
+PARALLEL_FOR_LOOP_INTERN
+      for(uint64_t local_site=0;local_site<lsites;local_site++){
 
 	uint32_t * site_buf = (uint32_t *)&fbuf[local_site];
 
@@ -176,9 +181,9 @@ class BinaryIO {
 	//	std::cout << "Site "<<local_site << std::hex<<site_buf[0] <<site_buf[1]<<std::dec <<std::endl;
 	scidac_csuma_thr ^= site_crc<<gsite29 | site_crc>>(32-gsite29);
 	scidac_csumb_thr ^= site_crc<<gsite31 | site_crc>>(32-gsite31);
-      });
+      }
 
-      thread_critical
+PARALLEL_CRITICAL
       {
 	scidac_csuma^= scidac_csuma_thr;
 	scidac_csumb^= scidac_csumb_thr;
@@ -196,23 +201,23 @@ class BinaryIO {
   {
     uint32_t * f = (uint32_t *)file_object;
     uint64_t count = bytes/sizeof(uint32_t);
-    thread_for( i, count, {  
+    parallel_for(uint64_t i=0;i<count;i++){  
       f[i] = ntohl(f[i]);
-    });
+    }
   }
   // LE must Swap and switch to host
   static inline void le32toh_v(void *file_object,uint64_t bytes)
   {
     uint32_t *fp = (uint32_t *)file_object;
+    uint32_t f;
 
     uint64_t count = bytes/sizeof(uint32_t);
-    thread_for(i,count,{
-      uint32_t f;
+    parallel_for(uint64_t i=0;i<count;i++){  
       f = fp[i];
       // got network order and the network to host
       f = ((f&0xFF)<<24) | ((f&0xFF00)<<8) | ((f&0xFF0000)>>8) | ((f&0xFF000000UL)>>24) ; 
       fp[i] = ntohl(f);
-    });
+    }
   }
 
   // BE is same as network
@@ -220,18 +225,19 @@ class BinaryIO {
   {
     uint64_t * f = (uint64_t *)file_object;
     uint64_t count = bytes/sizeof(uint64_t);
-    thread_for( i, count, {
+    parallel_for(uint64_t i=0;i<count;i++){  
       f[i] = Grid_ntohll(f[i]);
-    });
+    }
   }
   
   // LE must swap and switch;
   static inline void le64toh_v(void *file_object,uint64_t bytes)
   {
     uint64_t *fp = (uint64_t *)file_object;
+    uint64_t f,g;
+    
     uint64_t count = bytes/sizeof(uint64_t);
-    thread_for( i, count, {
-      uint64_t f,g;
+    parallel_for(uint64_t i=0;i<count;i++){  
       f = fp[i];
       // got network order and the network to host
       g = ((f&0xFF)<<24) | ((f&0xFF00)<<8) | ((f&0xFF0000)>>8) | ((f&0xFF000000UL)>>24) ; 
@@ -239,7 +245,7 @@ class BinaryIO {
       f = f >> 32;
       g|= ((f&0xFF)<<24) | ((f&0xFF00)<<8) | ((f&0xFF0000)>>8) | ((f&0xFF000000UL)>>24) ; 
       fp[i] = Grid_ntohll(g);
-    });
+    }
   }
   /////////////////////////////////////////////////////////////////////////////
   // Real action:
@@ -275,13 +281,13 @@ class BinaryIO {
     int nrank                = grid->ProcessorCount();
     int myrank               = grid->ThisRank();
 
-    Coordinate  psizes = grid->ProcessorGrid(); 
-    Coordinate  pcoor  = grid->ThisProcessorCoor();
-    Coordinate gLattice= grid->GlobalDimensions();
-    Coordinate lLattice= grid->LocalDimensions();
+    std::vector<int>  psizes = grid->ProcessorGrid(); 
+    std::vector<int>  pcoor  = grid->ThisProcessorCoor();
+    std::vector<int> gLattice= grid->GlobalDimensions();
+    std::vector<int> lLattice= grid->LocalDimensions();
 
-    Coordinate lStart(ndim);
-    Coordinate gStart(ndim);
+    std::vector<int> lStart(ndim);
+    std::vector<int> gStart(ndim);
 
     // Flatten the file
     uint64_t lsites = grid->lSites();
@@ -341,9 +347,8 @@ class BinaryIO {
     int ieee32big = (format == std::string("IEEE32BIG"));
     int ieee32    = (format == std::string("IEEE32"));
     int ieee64big = (format == std::string("IEEE64BIG"));
-    int ieee64    = (format == std::string("IEEE64") || format == std::string("IEEE64LITTLE"));
-    assert(ieee64||ieee32|ieee64big||ieee32big);
-    assert((ieee64+ieee32+ieee64big+ieee32big)==1);
+    int ieee64    = (format == std::string("IEEE64"));
+
     //////////////////////////////////////////////////////////////////////////////
     // Do the I/O
     //////////////////////////////////////////////////////////////////////////////
@@ -365,7 +370,7 @@ class BinaryIO {
 #endif
       } else {
 	std::cout << GridLogMessage <<"IOobject: C++ read I/O " << file << " : "
-                  << iodata.size() * sizeof(fobj) << " bytes and offset " << offset << std::endl;
+                  << iodata.size() * sizeof(fobj) << " bytes" << std::endl;
         std::ifstream fin;
 	fin.open(file, std::ios::binary | std::ios::in);
         if (control & BINARYIO_MASTER_APPEND)
@@ -540,7 +545,7 @@ class BinaryIO {
     typedef typename vobj::scalar_object sobj;
     typedef typename vobj::Realified::scalar_type word;    word w=0;
 
-    GridBase *grid = Umu.Grid();
+    GridBase *grid = Umu._grid;
     uint64_t lsites = grid->lSites();
 
     std::vector<sobj> scalardata(lsites); 
@@ -552,7 +557,7 @@ class BinaryIO {
     GridStopWatch timer; 
     timer.Start();
 
-    thread_for(x,lsites, { munge(iodata[x], scalardata[x]); });
+    parallel_for(uint64_t x=0;x<lsites;x++) munge(iodata[x], scalardata[x]);
 
     vectorizeFromLexOrdArray(scalardata,Umu);    
     grid->Barrier();
@@ -576,10 +581,8 @@ class BinaryIO {
   {
     typedef typename vobj::scalar_object sobj;
     typedef typename vobj::Realified::scalar_type word;    word w=0;
-    GridBase *grid = Umu.Grid();
-    uint64_t lsites = grid->lSites(), offsetCopy = offset;
-    int attemptsLeft = std::max(0, BinaryIO::latticeWriteMaxRetry);
-    bool checkWrite = (BinaryIO::latticeWriteMaxRetry >= 0);
+    GridBase *grid = Umu._grid;
+    uint64_t lsites = grid->lSites();
 
     std::vector<sobj> scalardata(lsites); 
     std::vector<fobj>     iodata(lsites); // Munge, checksum, byte order in here
@@ -590,40 +593,13 @@ class BinaryIO {
     GridStopWatch timer; timer.Start();
     unvectorizeToLexOrdArray(scalardata,Umu);    
 
-    thread_for(x, lsites, { munge(scalardata[x],iodata[x]); });
+    parallel_for(uint64_t x=0;x<lsites;x++) munge(scalardata[x],iodata[x]);
 
     grid->Barrier();
     timer.Stop();
-    while (attemptsLeft >= 0)
-    {
-      grid->Barrier();
-      IOobject(w,grid,iodata,file,offset,format,BINARYIO_WRITE|BINARYIO_LEXICOGRAPHIC,
-	             nersc_csum,scidac_csuma,scidac_csumb);
-      if (checkWrite)
-      {
-        std::vector<fobj> ckiodata(lsites);
-        uint32_t          cknersc_csum, ckscidac_csuma, ckscidac_csumb;
-        uint64_t          ckoffset = offsetCopy;
 
-        std::cout << GridLogMessage << "writeLatticeObject: read back object" << std::endl;
-        grid->Barrier();
-        IOobject(w,grid,ckiodata,file,ckoffset,format,BINARYIO_READ|BINARYIO_LEXICOGRAPHIC,
-	               cknersc_csum,ckscidac_csuma,ckscidac_csumb);
-        if ((cknersc_csum != nersc_csum) or (ckscidac_csuma != scidac_csuma) or (ckscidac_csumb != scidac_csumb))
-        {
-          std::cout << GridLogMessage << "writeLatticeObject: read test checksum failure, re-writing (" << attemptsLeft << " attempt(s) remaining)" << std::endl;
-          offset = offsetCopy;
-          thread_for(x,lsites, { munge(scalardata[x],iodata[x]); });
-        }
-        else
-        {
-          std::cout << GridLogMessage << "writeLatticeObject: read test checksum correct" << std::endl;
-          break;
-        }
-      }
-      attemptsLeft--;
-    }
-    
+    IOobject(w,grid,iodata,file,offset,format,BINARYIO_WRITE|BINARYIO_LEXICOGRAPHIC,
+	     nersc_csum,scidac_csuma,scidac_csumb);
 
     std::cout<<GridLogMessage<<"writeLatticeObject: unvectorize overhead "<<timer.Elapsed()  <<std::endl;
   }
@@ -631,8 +607,8 @@ class BinaryIO {
   /////////////////////////////////////////////////////////////////////////////
   // Read a RNG;  use IOobject and lexico map to an array of state 
   //////////////////////////////////////////////////////////////////////////////////////
-  static inline void readRNG(GridSerialRNG &serial_rng,
-			     GridParallelRNG &parallel_rng,
+  static inline void readRNG(GridSerialRNG &serial,
+			     GridParallelRNG &parallel,
 			     std::string file,
 			     uint64_t offset,
 			     uint32_t &nersc_csum,
@@ -646,7 +622,7 @@ class BinaryIO {
 
     std::string format = "IEEE32BIG";
 
-    GridBase *grid = parallel_rng.Grid();
+    GridBase *grid = parallel._grid;
     uint64_t gsites = grid->gSites();
     uint64_t lsites = grid->lSites();
 
@@ -663,11 +639,11 @@ class BinaryIO {
 	     nersc_csum,scidac_csuma,scidac_csumb);
 
     timer.Start();
-    thread_for(lidx,lsites,{
+    parallel_for(uint64_t lidx=0;lidx<lsites;lidx++){
       std::vector<RngStateType> tmp(RngStateCount);
       std::copy(iodata[lidx].begin(),iodata[lidx].end(),tmp.begin());
-      parallel_rng.SetState(tmp,lidx);
-      });
+      parallel.SetState(tmp,lidx);
+    }
     timer.Stop();
 
     iodata.resize(1);
@@ -677,7 +653,7 @@ class BinaryIO {
     {
       std::vector<RngStateType> tmp(RngStateCount);
       std::copy(iodata[0].begin(),iodata[0].end(),tmp.begin());
-      serial_rng.SetState(tmp,0);
+      serial.SetState(tmp,0);
     }
 
     nersc_csum   = nersc_csum   + nersc_csum_tmp;
@@ -693,8 +669,8 @@ class BinaryIO {
   /////////////////////////////////////////////////////////////////////////////
   // Write a RNG; lexico map to an array of state and use IOobject
   //////////////////////////////////////////////////////////////////////////////////////
-  static inline void writeRNG(GridSerialRNG &serial_rng,
-			      GridParallelRNG &parallel_rng,
+  static inline void writeRNG(GridSerialRNG &serial,
+			      GridParallelRNG &parallel,
 			      std::string file,
 			      uint64_t offset,
 			      uint32_t &nersc_csum,
@@ -706,7 +682,7 @@ class BinaryIO {
     const int RngStateCount = GridSerialRNG::RngStateCount;
     typedef std::array<RngStateType,RngStateCount> RNGstate;
 
-    GridBase *grid = parallel_rng.Grid();
+    GridBase *grid = parallel._grid;
     uint64_t gsites = grid->gSites();
     uint64_t lsites = grid->lSites();
 
@@ -721,11 +697,11 @@ class BinaryIO {
 
     timer.Start();
     std::vector<RNGstate> iodata(lsites);
-    thread_for(lidx,lsites,{
+    parallel_for(uint64_t lidx=0;lidx<lsites;lidx++){
       std::vector<RngStateType> tmp(RngStateCount);
-      parallel_rng.GetState(tmp,lidx);
+      parallel.GetState(tmp,lidx);
       std::copy(tmp.begin(),tmp.end(),iodata[lidx].begin());
-    });
+    }
     timer.Stop();
 
     IOobject(w,grid,iodata,file,offset,format,BINARYIO_WRITE|BINARYIO_LEXICOGRAPHIC,
@@ -733,7 +709,7 @@ class BinaryIO {
     iodata.resize(1);
     {
       std::vector<RngStateType> tmp(RngStateCount);
-      serial_rng.GetState(tmp,0);
+      serial.GetState(tmp,0);
       std::copy(tmp.begin(),tmp.end(),iodata[0].begin());
     }
     IOobject(w,grid,iodata,file,offset,format,BINARYIO_WRITE|BINARYIO_MASTER_APPEND,
@@ -749,5 +725,5 @@ class BinaryIO {
     std::cout << GridLogMessage << "RNG state overhead " << timer.Elapsed() << std::endl;
   }
 };
-
-NAMESPACE_END(Grid);
+}
+#endif

Grid/parallelIO/IldgIO.h

@@ -24,7 +24,8 @@ See the full license in the file "LICENSE" in the top level distribution
 directory
 *************************************************************************************/
 /*  END LEGAL */
-#pragma once
+#ifndef GRID_ILDG_IO_H
+#define GRID_ILDG_IO_H
 
 #ifdef HAVE_LIME
 #include <algorithm>
@@ -42,13 +43,8 @@ extern "C" {
 #include "lime.h"
 }
 
-NAMESPACE_BEGIN(Grid);
-
-#define GRID_FIELD_NORM "FieldNormMetaData"
-#define GRID_FIELD_NORM_CALC(FieldNormMetaData_, n2ck) \
-0.5*fabs(FieldNormMetaData_.norm2 - n2ck)/(FieldNormMetaData_.norm2 + n2ck)
-#define GRID_FIELD_NORM_CHECK(FieldNormMetaData_, n2ck) \
-assert(GRID_FIELD_NORM_CALC(FieldNormMetaData_, n2ck) < 1.0e-5);
+namespace Grid {
+namespace QCD {
 
   /////////////////////////////////
   // Encode word types as strings
@@ -138,7 +134,7 @@ assert(GRID_FIELD_NORM_CALC(FieldNormMetaData_, n2ck) < 1.0e-5);
    /////////////////////////////////////
    // Scidac Private File structure
    /////////////////////////////////////
-   _scidacFile              = scidacFile(field.Grid());
+   _scidacFile              = scidacFile(field._grid);
 
    /////////////////////////////////////
    // Scidac Private Record structure
@@ -209,7 +205,6 @@ class GridLimeReader : public BinaryIO {
   {
     typedef typename vobj::scalar_object sobj;
     scidacChecksum scidacChecksum_;
-    FieldNormMetaData  FieldNormMetaData_;
     uint32_t nersc_csum,scidac_csuma,scidac_csumb;
 
     std::string format = getFormatString<vobj>();
@@ -225,10 +220,10 @@ class GridLimeReader : public BinaryIO {
 
 	//	std::cout << GridLogMessage<< " readLimeLatticeBinaryObject matches ! " <<std::endl;
 
-	uint64_t PayloadSize = sizeof(sobj) * field.Grid()->_gsites;
+	uint64_t PayloadSize = sizeof(sobj) * field._grid->_gsites;
 
 	//	std::cout << "R sizeof(sobj)= " <<sizeof(sobj)<<std::endl;
-	//	std::cout << "R Gsites " <<field.Grid()->_gsites<<std::endl;
+	//	std::cout << "R Gsites " <<field._grid->_gsites<<std::endl;
 	//	std::cout << "R Payload expected " <<PayloadSize<<std::endl;
 	//	std::cout << "R file size " <<file_bytes <<std::endl;
 
@@ -238,52 +233,20 @@ class GridLimeReader : public BinaryIO {
 	//	std::cout << " ReadLatticeObject from offset "<<offset << std::endl;
 	BinarySimpleMunger<sobj,sobj> munge;
 	BinaryIO::readLatticeObject< vobj, sobj >(field, filename, munge, offset, format,nersc_csum,scidac_csuma,scidac_csumb);
-	std::cout << GridLogMessage << "SciDAC checksum A " << std::hex << scidac_csuma << std::dec << std::endl;
-	std::cout << GridLogMessage << "SciDAC checksum B " << std::hex << scidac_csumb << std::dec << std::endl;
+
 	/////////////////////////////////////////////
 	// Insist checksum is next record
 	/////////////////////////////////////////////
-	readScidacChecksum(scidacChecksum_,FieldNormMetaData_);
+	readLimeObject(scidacChecksum_,std::string("scidacChecksum"),std::string(SCIDAC_CHECKSUM));
+
 	/////////////////////////////////////////////
 	// Verify checksums
 	/////////////////////////////////////////////
-	if(FieldNormMetaData_.norm2 != 0.0){ 
-	  RealD n2ck = norm2(field);
-	  std::cout << GridLogMessage << "Field norm: metadata= " << FieldNormMetaData_.norm2 
-              << " / field= " << n2ck << " / rdiff= " << GRID_FIELD_NORM_CALC(FieldNormMetaData_,n2ck) << std::endl;
-	  GRID_FIELD_NORM_CHECK(FieldNormMetaData_,n2ck);
-	}
 	assert(scidacChecksumVerify(scidacChecksum_,scidac_csuma,scidac_csumb)==1);
-
-	// find out if next field is a GridFieldNorm
 	return;
       }
     }
   }
-  void readScidacChecksum(scidacChecksum     &scidacChecksum_,
-			  FieldNormMetaData  &FieldNormMetaData_)
-  {
-    FieldNormMetaData_.norm2 =0.0;
-    std::string scidac_str(SCIDAC_CHECKSUM);
-    std::string field_norm_str(GRID_FIELD_NORM);
-    while ( limeReaderNextRecord(LimeR) == LIME_SUCCESS ) { 
-      uint64_t nbytes = limeReaderBytes(LimeR);//size of this record (configuration)
-      std::vector<char> xmlc(nbytes+1,'\0');
-      limeReaderReadData((void *)&xmlc[0], &nbytes, LimeR);    
-      std::string xmlstring = std::string(&xmlc[0]);
-      XmlReader RD(xmlstring, true, "");
-      if ( !strncmp(limeReaderType(LimeR), field_norm_str.c_str(),strlen(field_norm_str.c_str()) )  ) {
-	//	std::cout << "FieldNormMetaData "<<xmlstring<<std::endl;
-	read(RD,field_norm_str,FieldNormMetaData_);
-      }
-      if ( !strncmp(limeReaderType(LimeR), scidac_str.c_str(),strlen(scidac_str.c_str()) )  ) {
-	//	std::cout << SCIDAC_CHECKSUM << " " <<xmlstring<<std::endl;
-	read(RD,std::string("scidacChecksum"),scidacChecksum_);
-	return;
-      }      
-    }
-    assert(0);
-  }
   ////////////////////////////////////////////
   // Read a generic serialisable object
   ////////////////////////////////////////////
@@ -302,7 +265,7 @@ class GridLimeReader : public BinaryIO {
 	limeReaderReadData((void *)&xmlc[0], &nbytes, LimeR);    
 	//	std::cout << GridLogMessage<< " readLimeObject matches XML " << &xmlc[0] <<std::endl;
 
-	xmlstring = std::string(&xmlc[0]);
+   xmlstring = std::string(&xmlc[0]);
 	return;
       }
 
@@ -316,8 +279,8 @@ class GridLimeReader : public BinaryIO {
     std::string xmlstring;
 
     readLimeObject(xmlstring, record_name);
-    XmlReader RD(xmlstring, true, "");
-    read(RD,object_name,object);
+	  XmlReader RD(xmlstring, true, "");
+	  read(RD,object_name,object);
   }
 };
 
@@ -404,7 +367,7 @@ class GridLimeWriter : public BinaryIO
   ////////////////////////////////////////////////////
   // Write a generic lattice field and csum
   // This routine is Collectively called by all nodes
-  // in communicator used by the field.Grid()
+  // in communicator used by the field._grid
   ////////////////////////////////////////////////////
   template<class vobj>
   void writeLimeLatticeBinaryObject(Lattice<vobj> &field,std::string record_name)
@@ -423,10 +386,8 @@ class GridLimeWriter : public BinaryIO
     //  v) Continue writing scidac record.
     ////////////////////////////////////////////////////////////////////
     
-    GridBase *grid = field.Grid();
-    assert(boss_node == field.Grid()->IsBoss() );
-
-    FieldNormMetaData FNMD; FNMD.norm2 = norm2(field);
+    GridBase *grid = field._grid;
+    assert(boss_node == field._grid->IsBoss() );
 
     ////////////////////////////////////////////
     // Create record header
@@ -441,7 +402,7 @@ class GridLimeWriter : public BinaryIO
     }
     
     //    std::cout << "W sizeof(sobj)"      <<sizeof(sobj)<<std::endl;
-    //    std::cout << "W Gsites "           <<field.Grid()->_gsites<<std::endl;
+    //    std::cout << "W Gsites "           <<field._grid->_gsites<<std::endl;
     //    std::cout << "W Payload expected " <<PayloadSize<<std::endl;
 
     ////////////////////////////////////////////////
@@ -486,7 +447,6 @@ class GridLimeWriter : public BinaryIO
     checksum.suma= streama.str();
     checksum.sumb= streamb.str();
     if ( boss_node ) { 
-      writeLimeObject(0,0,FNMD,std::string(GRID_FIELD_NORM),std::string(GRID_FIELD_NORM));
       writeLimeObject(0,1,checksum,std::string("scidacChecksum"),std::string(SCIDAC_CHECKSUM));
     }
   }
@@ -513,7 +473,7 @@ class ScidacWriter : public GridLimeWriter {
   void writeScidacFieldRecord(Lattice<vobj> &field,userRecord _userRecord,
                               const unsigned int recordScientificPrec = 0) 
   {
-    GridBase * grid = field.Grid();
+    GridBase * grid = field._grid;
 
     ////////////////////////////////////////
     // fill the Grid header
@@ -555,7 +515,7 @@ class ScidacReader : public GridLimeReader {
   void readScidacFieldRecord(Lattice<vobj> &field,userRecord &_userRecord) 
   {
     typedef typename vobj::scalar_object sobj;
-    GridBase * grid = field.Grid();
+    GridBase * grid = field._grid;
 
     ////////////////////////////////////////
     // fill the Grid header
@@ -622,7 +582,7 @@ class IldgWriter : public ScidacWriter {
   template <class vsimd>
   void writeConfiguration(Lattice<iLorentzColourMatrix<vsimd> > &Umu,int sequence,std::string LFN,std::string description) 
   {
-    GridBase * grid = Umu.Grid();
+    GridBase * grid = Umu._grid;
     typedef Lattice<iLorentzColourMatrix<vsimd> > GaugeField;
     typedef iLorentzColourMatrix<vsimd> vobj;
     typedef typename vobj::scalar_object sobj;
@@ -664,12 +624,6 @@ class IldgWriter : public ScidacWriter {
     assert(header.nd==4);
     assert(header.nd==header.dimension.size());
 
-    //////////////////////////////////////////////////////////////////////////////
-    // Field norm tests
-    //////////////////////////////////////////////////////////////////////////////
-    FieldNormMetaData FieldNormMetaData_;
-    FieldNormMetaData_.norm2 = norm2(Umu);
-
     //////////////////////////////////////////////////////////////////////////////
     // Fill the USQCD info field
     //////////////////////////////////////////////////////////////////////////////
@@ -678,12 +632,11 @@ class IldgWriter : public ScidacWriter {
     info.plaq   = header.plaquette;
     info.linktr = header.link_trace;
 
-    //    std::cout << GridLogMessage << " Writing config; IldgIO n2 "<< FieldNormMetaData_.norm2<<std::endl;
+    std::cout << GridLogMessage << " Writing config; IldgIO "<<std::endl;
     //////////////////////////////////////////////
     // Fill the Lime file record by record
     //////////////////////////////////////////////
     writeLimeObject(1,0,header ,std::string("FieldMetaData"),std::string(GRID_FORMAT)); // Open message 
-    writeLimeObject(0,0,FieldNormMetaData_,FieldNormMetaData_.SerialisableClassName(),std::string(GRID_FIELD_NORM));
     writeLimeObject(0,0,_scidacFile,_scidacFile.SerialisableClassName(),std::string(SCIDAC_PRIVATE_FILE_XML));
     writeLimeObject(0,1,info,info.SerialisableClassName(),std::string(SCIDAC_FILE_XML));
     writeLimeObject(1,0,_scidacRecord,_scidacRecord.SerialisableClassName(),std::string(SCIDAC_PRIVATE_RECORD_XML));
@@ -715,9 +668,9 @@ class IldgReader : public GridLimeReader {
     typedef LorentzColourMatrixF fobj;
     typedef LorentzColourMatrixD dobj;
 
-    GridBase *grid = Umu.Grid();
+    GridBase *grid = Umu._grid;
 
-    Coordinate dims = Umu.Grid()->FullDimensions();
+    std::vector<int> dims = Umu._grid->FullDimensions();
 
     assert(dims.size()==4);
 
@@ -726,7 +679,6 @@ class IldgReader : public GridLimeReader {
     std::string    ildgLFN_       ;
     scidacChecksum scidacChecksum_; 
     usqcdInfo      usqcdInfo_     ;
-    FieldNormMetaData FieldNormMetaData_;
 
     // track what we read from file
     int found_ildgFormat    =0;
@@ -735,7 +687,7 @@ class IldgReader : public GridLimeReader {
     int found_usqcdInfo     =0;
     int found_ildgBinary =0;
     int found_FieldMetaData =0;
-    int found_FieldNormMetaData =0;
+
     uint32_t nersc_csum;
     uint32_t scidac_csuma;
     uint32_t scidac_csumb;
@@ -769,7 +721,7 @@ class IldgReader : public GridLimeReader {
 	//////////////////////////////////
 	// ILDG format record
 
-	std::string xmlstring(&xmlc[0]);
+  std::string xmlstring(&xmlc[0]);
 	if ( !strncmp(limeReaderType(LimeR), ILDG_FORMAT,strlen(ILDG_FORMAT)) ) { 
 
 	  XmlReader RD(xmlstring, true, "");
@@ -822,17 +774,11 @@ class IldgReader : public GridLimeReader {
 	  found_scidacChecksum = 1;
 	}
 
-	if ( !strncmp(limeReaderType(LimeR), GRID_FIELD_NORM,strlen(GRID_FIELD_NORM)) ) { 
-	  XmlReader RD(xmlstring, true, "");
-	  read(RD,GRID_FIELD_NORM,FieldNormMetaData_);
-	  found_FieldNormMetaData = 1;
-	}
-
       } else {  
 	/////////////////////////////////
 	// Binary data
 	/////////////////////////////////
-	//	std::cout << GridLogMessage << "ILDG Binary record found : "  ILDG_BINARY_DATA << std::endl;
+	std::cout << GridLogMessage << "ILDG Binary record found : "  ILDG_BINARY_DATA << std::endl;
 	uint64_t offset= ftello(File);
 	if ( format == std::string("IEEE64BIG") ) {
 	  GaugeSimpleMunger<dobj, sobj> munge;
@@ -851,7 +797,6 @@ class IldgReader : public GridLimeReader {
     // Minimally must find binary segment and checksum
     // Since this is an ILDG reader require ILDG format
     //////////////////////////////////////////////////////
-    assert(found_ildgLFN);
     assert(found_ildgBinary);
     assert(found_ildgFormat);
     assert(found_scidacChecksum);
@@ -900,13 +845,6 @@ class IldgReader : public GridLimeReader {
     ////////////////////////////////////////////////////////////
     // Really really want to mandate a scidac checksum
     ////////////////////////////////////////////////////////////
-    if ( found_FieldNormMetaData ) { 
-      RealD nn = norm2(Umu);
-      GRID_FIELD_NORM_CHECK(FieldNormMetaData_,nn);
-      std::cout << GridLogMessage<<"FieldNormMetaData matches " << std::endl;
-    }  else { 
-      std::cout << GridLogWarning<<"FieldNormMetaData not found. " << std::endl;
-    }
     if ( found_scidacChecksum ) {
       FieldMetaData_.scidac_checksuma = stoull(scidacChecksum_.suma,0,16);
       FieldMetaData_.scidac_checksumb = stoull(scidacChecksum_.sumb,0,16);
@@ -929,9 +867,9 @@ class IldgReader : public GridLimeReader {
   }
  };
 
-NAMESPACE_END(Grid);
-
+}}
 
 //HAVE_LIME
 #endif
 
+#endif