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Making GPU happier
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Peter Boyle
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Grid/qcd/action/fermion/GparityWilsonImpl.h
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321
Grid/qcd/action/fermion/GparityWilsonImpl.h
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/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/qcd/action/fermion/FermionOperatorImpl.h
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Copyright (C) 2015
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Author: Peter Boyle <pabobyle@ph.ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution
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directory
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*************************************************************************************/
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/* END LEGAL */
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#pragma once
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NAMESPACE_BEGIN(Grid);
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template <class S, class Representation = FundamentalRepresentation, class Options=CoeffReal>
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class GparityWilsonImpl : public ConjugateGaugeImpl<GaugeImplTypes<S, Representation::Dimension> > {
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public:
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static const int Dimension = Representation::Dimension;
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static const bool isFundamental = Representation::isFundamental;
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static const int Nhcs = Options::Nhcs;
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static const bool LsVectorised=false;
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typedef ConjugateGaugeImpl< GaugeImplTypes<S,Dimension> > Gimpl;
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INHERIT_GIMPL_TYPES(Gimpl);
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typedef typename Options::_Coeff_t Coeff_t;
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typedef typename Options::template PrecisionMapper<Simd>::LowerPrecVector SimdL;
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template <typename vtype> using iImplSpinor = iVector<iVector<iVector<vtype, Dimension>, Ns>, Ngp>;
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template <typename vtype> using iImplPropagator = iVector<iMatrix<iMatrix<vtype, Dimension>, Ns>, Ngp>;
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template <typename vtype> using iImplHalfSpinor = iVector<iVector<iVector<vtype, Dimension>, Nhs>, Ngp>;
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template <typename vtype> using iImplHalfCommSpinor = iVector<iVector<iVector<vtype, Dimension>, Nhcs>, Ngp>;
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template <typename vtype> using iImplDoubledGaugeField = iVector<iVector<iScalar<iMatrix<vtype, Dimension> >, Nds>, Ngp>;
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typedef iImplSpinor<Simd> SiteSpinor;
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typedef iImplPropagator<Simd> SitePropagator;
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typedef iImplHalfSpinor<Simd> SiteHalfSpinor;
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typedef iImplHalfCommSpinor<SimdL> SiteHalfCommSpinor;
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typedef iImplDoubledGaugeField<Simd> SiteDoubledGaugeField;
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typedef Lattice<SiteSpinor> FermionField;
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typedef Lattice<SitePropagator> PropagatorField;
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typedef Lattice<SiteDoubledGaugeField> DoubledGaugeField;
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typedef GparityWilsonImplParams ImplParams;
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typedef WilsonCompressor<SiteHalfCommSpinor,SiteHalfSpinor, SiteSpinor> Compressor;
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typedef WilsonStencil<SiteSpinor, SiteHalfSpinor, ImplParams> StencilImpl;
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typedef typename StencilImpl::View_type StencilView;
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ImplParams Params;
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GparityWilsonImpl(const ImplParams &p = ImplParams()) : Params(p){};
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// provide the multiply by link that is differentiated between Gparity (with
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// flavour index) and non-Gparity
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template<class _Spinor>
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static accelerator_inline void multLink(_Spinor &phi,
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const SiteDoubledGaugeField &U,
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const _Spinor &chi,
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int mu,
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StencilEntry *SE,
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StencilView &St)
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{
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int direction = St._directions[mu];
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int distance = St._distances[mu];
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int ptype = St._permute_type[mu];
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int sl = St._simd_layout[direction];
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Coordinate icoor;
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#ifdef __CUDA_ARCH__
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_Spinor tmp;
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const int Nsimd =SiteDoubledGaugeField::Nsimd();
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int s = SIMTlane(Nsimd);
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St.iCoorFromIindex(icoor,s);
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int mmu = mu % Nd;
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if ( SE->_around_the_world && St.parameters.twists[mmu] ) {
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int permute_lane = (sl==1)
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|| ((distance== 1)&&(icoor[direction]==1))
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|| ((distance==-1)&&(icoor[direction]==0));
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if ( permute_lane ) {
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tmp(0) = chi(1);
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tmp(1) = chi(0);
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} else {
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tmp(0) = chi(0);
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tmp(1) = chi(1);
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}
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auto UU0=coalescedRead(U(0)(mu));
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auto UU1=coalescedRead(U(1)(mu));
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mult(&phi(0),&UU0,&tmp(0));
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mult(&phi(1),&UU1,&tmp(1));
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} else {
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auto UU0=coalescedRead(U(0)(mu));
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auto UU1=coalescedRead(U(1)(mu));
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mult(&phi(0),&UU0,&chi(0));
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mult(&phi(1),&UU1,&chi(1));
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}
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#else
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typedef _Spinor vobj;
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typedef typename SiteHalfSpinor::scalar_object sobj;
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typedef typename SiteHalfSpinor::vector_type vector_type;
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vobj vtmp;
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sobj stmp;
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const int Nsimd =vector_type::Nsimd();
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// Fixme X.Y.Z.T hardcode in stencil
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int mmu = mu % Nd;
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// assert our assumptions
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assert((distance == 1) || (distance == -1)); // nearest neighbour stencil hard code
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assert((sl == 1) || (sl == 2));
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if ( SE->_around_the_world && St.parameters.twists[mmu] ) {
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if ( sl == 2 ) {
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ExtractBuffer<sobj> vals(Nsimd);
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extract(chi,vals);
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for(int s=0;s<Nsimd;s++){
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St.iCoorFromIindex(icoor,s);
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assert((icoor[direction]==0)||(icoor[direction]==1));
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int permute_lane;
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if ( distance == 1) {
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permute_lane = icoor[direction]?1:0;
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} else {
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permute_lane = icoor[direction]?0:1;
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}
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if ( permute_lane ) {
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stmp(0) = vals[s](1);
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stmp(1) = vals[s](0);
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vals[s] = stmp;
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}
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}
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merge(vtmp,vals);
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} else {
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vtmp(0) = chi(1);
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vtmp(1) = chi(0);
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}
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mult(&phi(0),&U(0)(mu),&vtmp(0));
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mult(&phi(1),&U(1)(mu),&vtmp(1));
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} else {
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mult(&phi(0),&U(0)(mu),&chi(0));
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mult(&phi(1),&U(1)(mu),&chi(1));
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}
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#endif
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}
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// Fixme: Gparity prop * link
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static accelerator_inline void multLinkProp(SitePropagator &phi,
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const SiteDoubledGaugeField &U,
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const SitePropagator &chi,
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int mu)
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{
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assert(0);
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}
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template <class ref>
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static accelerator_inline void loadLinkElement(Simd ®, ref &memory)
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{
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reg = memory;
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}
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inline void DoubleStore(GridBase *GaugeGrid,DoubledGaugeField &Uds,const GaugeField &Umu)
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{
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conformable(Uds.Grid(),GaugeGrid);
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conformable(Umu.Grid(),GaugeGrid);
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GaugeLinkField Utmp (GaugeGrid);
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GaugeLinkField U (GaugeGrid);
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GaugeLinkField Uconj(GaugeGrid);
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Lattice<iScalar<vInteger> > coor(GaugeGrid);
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for(int mu=0;mu<Nd;mu++){
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LatticeCoordinate(coor,mu);
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U = PeekIndex<LorentzIndex>(Umu,mu);
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Uconj = conjugate(U);
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// This phase could come from a simple bc 1,1,-1,1 ..
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int neglink = GaugeGrid->GlobalDimensions()[mu]-1;
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if ( Params.twists[mu] ) {
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Uconj = where(coor==neglink,-Uconj,Uconj);
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}
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auto U_v = U.View();
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auto Uds_v = Uds.View();
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auto Uconj_v = Uconj.View();
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auto Utmp_v= Utmp.View();
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thread_loop( (auto ss=U_v.begin();ss<U_v.end();ss++),{
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Uds_v[ss](0)(mu) = U_v[ss]();
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Uds_v[ss](1)(mu) = Uconj_v[ss]();
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});
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U = adj(Cshift(U ,mu,-1)); // correct except for spanning the boundary
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Uconj = adj(Cshift(Uconj,mu,-1));
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Utmp = U;
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if ( Params.twists[mu] ) {
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Utmp = where(coor==0,Uconj,Utmp);
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}
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thread_loop((auto ss=Utmp_v.begin();ss<Utmp_v.end();ss++),{
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Uds_v[ss](0)(mu+4) = Utmp_v[ss]();
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});
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Utmp = Uconj;
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if ( Params.twists[mu] ) {
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Utmp = where(coor==0,U,Utmp);
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}
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thread_loop((auto ss=Utmp_v.begin();ss<Utmp_v.end();ss++),{
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Uds_v[ss](1)(mu+4) = Utmp_v[ss]();
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});
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}
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}
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inline void InsertForce4D(GaugeField &mat, FermionField &Btilde, FermionField &A, int mu) {
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// DhopDir provides U or Uconj depending on coor/flavour.
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GaugeLinkField link(mat.Grid());
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// use lorentz for flavour as hack.
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auto tmp = TraceIndex<SpinIndex>(outerProduct(Btilde, A));
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auto link_v = link.View();
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auto tmp_v = tmp.View();
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thread_loop((auto ss = tmp_v.begin(); ss < tmp_v.end(); ss++), {
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link_v[ss]() = tmp_v[ss](0, 0) + conjugate(tmp_v[ss](1, 1));
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});
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PokeIndex<LorentzIndex>(mat, link, mu);
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return;
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}
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inline void outerProductImpl(PropagatorField &mat, const FermionField &Btilde, const FermionField &A){
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//mat = outerProduct(Btilde, A);
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assert(0);
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}
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inline void TraceSpinImpl(GaugeLinkField &mat, PropagatorField&P) {
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assert(0);
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/*
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auto tmp = TraceIndex<SpinIndex>(P);
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parallel_for(auto ss = tmp.begin(); ss < tmp.end(); ss++) {
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mat[ss]() = tmp[ss](0, 0) + conjugate(tmp[ss](1, 1));
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}
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*/
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}
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inline void extractLinkField(std::vector<GaugeLinkField> &mat, DoubledGaugeField &Uds){
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assert(0);
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}
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inline void InsertForce5D(GaugeField &mat, FermionField &Btilde, FermionField Ã, int mu) {
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int Ls = Btilde.Grid()->_fdimensions[0];
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GaugeLinkField tmp(mat.Grid());
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tmp = Zero();
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auto tmp_v = tmp.View();
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auto Atilde_v = Atilde.View();
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auto Btilde_v = Btilde.View();
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thread_loop((int ss = 0; ss < tmp.Grid()->oSites(); ss++) ,{
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for (int s = 0; s < Ls; s++) {
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int sF = s + Ls * ss;
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auto ttmp = traceIndex<SpinIndex>(outerProduct(Btilde_v[sF], Atilde_v[sF]));
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tmp_v[ss]() = tmp_v[ss]() + ttmp(0, 0) + conjugate(ttmp(1, 1));
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}
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});
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PokeIndex<LorentzIndex>(mat, tmp, mu);
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return;
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}
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};
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typedef GparityWilsonImpl<vComplex , FundamentalRepresentation,CoeffReal> GparityWilsonImplR; // Real.. whichever prec
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typedef GparityWilsonImpl<vComplexF, FundamentalRepresentation,CoeffReal> GparityWilsonImplF; // Float
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typedef GparityWilsonImpl<vComplexD, FundamentalRepresentation,CoeffReal> GparityWilsonImplD; // Double
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typedef GparityWilsonImpl<vComplex , FundamentalRepresentation,CoeffRealHalfComms> GparityWilsonImplRL; // Real.. whichever prec
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typedef GparityWilsonImpl<vComplexF, FundamentalRepresentation,CoeffRealHalfComms> GparityWilsonImplFH; // Float
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typedef GparityWilsonImpl<vComplexD, FundamentalRepresentation,CoeffRealHalfComms> GparityWilsonImplDF; // Double
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NAMESPACE_END(Grid);
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