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Remove 5d vectorisation
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Peter Boyle
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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/DomainWallEOFAFermion.cc
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Copyright (C) 2017
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Author: Peter Boyle <pabobyle@ph.ed.ac.uk>
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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Author: Peter Boyle <peterboyle@Peters-MacBook-Pro-2.local>
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Author: paboyle <paboyle@ph.ed.ac.uk>
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Author: David Murphy <dmurphy@phys.columbia.edu>
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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 directory
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*************************************************************************************/
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/* END LEGAL */
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#pragma once
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#include <Grid/Grid_Eigen_Dense.h>
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#include <Grid/qcd/action/fermion/FermionCore.h>
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#include <Grid/qcd/action/fermion/DomainWallEOFAFermion.h>
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NAMESPACE_BEGIN(Grid);
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template<class Impl>
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DomainWallEOFAFermion<Impl>::DomainWallEOFAFermion(
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GaugeField &_Umu,
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GridCartesian &FiveDimGrid,
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GridRedBlackCartesian &FiveDimRedBlackGrid,
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GridCartesian &FourDimGrid,
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GridRedBlackCartesian &FourDimRedBlackGrid,
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RealD _mq1, RealD _mq2, RealD _mq3,
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RealD _shift, int _pm, RealD _M5, const ImplParams &p) :
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AbstractEOFAFermion<Impl>(_Umu, FiveDimGrid, FiveDimRedBlackGrid,
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FourDimGrid, FourDimRedBlackGrid, _mq1, _mq2, _mq3,
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_shift, _pm, _M5, 1.0, 0.0, p)
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{
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RealD eps = 1.0;
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Approx::zolotarev_data *zdata = Approx::higham(eps,this->Ls);
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assert(zdata->n == this->Ls);
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std::cout << GridLogMessage << "DomainWallEOFAFermion with Ls=" << this->Ls << std::endl;
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this->SetCoefficientsTanh(zdata, 1.0, 0.0);
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Approx::zolotarev_free(zdata);
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}
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/***************************************************************
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* Additional EOFA operators only called outside the inverter.
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* Since speed is not essential, simple axpby-style
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* implementations should be fine.
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***************************************************************/
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template<class Impl>
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void DomainWallEOFAFermion<Impl>::Omega(const FermionField& psi, FermionField& Din, int sign, int dag)
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{
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int Ls = this->Ls;
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Din = Zero();
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if((sign == 1) && (dag == 0)){ axpby_ssp(Din, 0.0, psi, 1.0, psi, Ls-1, 0); }
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else if((sign == -1) && (dag == 0)){ axpby_ssp(Din, 0.0, psi, 1.0, psi, 0, 0); }
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else if((sign == 1 ) && (dag == 1)){ axpby_ssp(Din, 0.0, psi, 1.0, psi, 0, Ls-1); }
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else if((sign == -1) && (dag == 1)){ axpby_ssp(Din, 0.0, psi, 1.0, psi, 0, 0); }
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}
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// This is just the identity for DWF
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template<class Impl>
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void DomainWallEOFAFermion<Impl>::Dtilde(const FermionField& psi, FermionField& chi){ chi = psi; }
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// This is just the identity for DWF
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template<class Impl>
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void DomainWallEOFAFermion<Impl>::DtildeInv(const FermionField& psi, FermionField& chi){ chi = psi; }
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/*****************************************************************************************************/
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template<class Impl>
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RealD DomainWallEOFAFermion<Impl>::M(const FermionField& psi, FermionField& chi)
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{
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FermionField Din(psi.Grid());
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this->Meooe5D(psi, Din);
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this->DW(Din, chi, DaggerNo);
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axpby(chi, 1.0, 1.0, chi, psi);
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this->M5D(psi, chi);
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return(norm2(chi));
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}
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template<class Impl>
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RealD DomainWallEOFAFermion<Impl>::Mdag(const FermionField& psi, FermionField& chi)
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{
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FermionField Din(psi.Grid());
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this->DW(psi, Din, DaggerYes);
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this->MeooeDag5D(Din, chi);
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this->M5Ddag(psi, chi);
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axpby(chi, 1.0, 1.0, chi, psi);
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return(norm2(chi));
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}
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/********************************************************************
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* Performance critical fermion operators called inside the inverter
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********************************************************************/
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template<class Impl>
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void DomainWallEOFAFermion<Impl>::M5D(const FermionField& psi, FermionField& chi)
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{
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int Ls = this->Ls;
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int pm = this->pm;
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RealD shift = this->shift;
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RealD mq1 = this->mq1;
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RealD mq2 = this->mq2;
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RealD mq3 = this->mq3;
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// coefficients for shift operator ( = shift*\gamma_{5}*R_{5}*\Delta_{\pm}(mq2,mq3)*P_{\pm} )
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Coeff_t shiftp(0.0), shiftm(0.0);
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if(shift != 0.0){
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if(pm == 1){ shiftp = shift*(mq3-mq2); }
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else{ shiftm = -shift*(mq3-mq2); }
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}
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Vector<Coeff_t> diag(Ls,1.0);
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Vector<Coeff_t> upper(Ls,-1.0); upper[Ls-1] = mq1 + shiftm;
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Vector<Coeff_t> lower(Ls,-1.0); lower[0] = mq1 + shiftp;
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#if(0)
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std::cout << GridLogMessage << "DomainWallEOFAFermion::M5D(FF&,FF&):" << std::endl;
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for(int i=0; i<diag.size(); ++i){
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std::cout << GridLogMessage << "diag[" << i << "] =" << diag[i] << std::endl;
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}
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for(int i=0; i<upper.size(); ++i){
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std::cout << GridLogMessage << "upper[" << i << "] =" << upper[i] << std::endl;
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}
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for(int i=0; i<lower.size(); ++i){
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std::cout << GridLogMessage << "lower[" << i << "] =" << lower[i] << std::endl;
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}
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#endif
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this->M5D(psi, chi, chi, lower, diag, upper);
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}
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template<class Impl>
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void DomainWallEOFAFermion<Impl>::M5Ddag(const FermionField& psi, FermionField& chi)
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{
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int Ls = this->Ls;
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int pm = this->pm;
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RealD shift = this->shift;
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RealD mq1 = this->mq1;
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RealD mq2 = this->mq2;
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RealD mq3 = this->mq3;
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// coefficients for shift operator ( = shift*\gamma_{5}*R_{5}*\Delta_{\pm}(mq2,mq3)*P_{\pm} )
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Coeff_t shiftp(0.0), shiftm(0.0);
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if(shift != 0.0){
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if(pm == 1){ shiftp = shift*(mq3-mq2); }
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else{ shiftm = -shift*(mq3-mq2); }
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}
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Vector<Coeff_t> diag(Ls,1.0);
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Vector<Coeff_t> upper(Ls,-1.0); upper[Ls-1] = mq1 + shiftp;
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Vector<Coeff_t> lower(Ls,-1.0); lower[0] = mq1 + shiftm;
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this->M5Ddag(psi, chi, chi, lower, diag, upper);
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}
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// half checkerboard operations
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template<class Impl>
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void DomainWallEOFAFermion<Impl>::Mooee(const FermionField& psi, FermionField& chi)
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{
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int Ls = this->Ls;
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Vector<Coeff_t> diag = this->bee;
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Vector<Coeff_t> upper(Ls);
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Vector<Coeff_t> lower(Ls);
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for(int s=0; s<Ls; s++){
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upper[s] = -this->cee[s];
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lower[s] = -this->cee[s];
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}
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upper[Ls-1] = this->dm;
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lower[0] = this->dp;
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this->M5D(psi, psi, chi, lower, diag, upper);
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}
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template<class Impl>
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void DomainWallEOFAFermion<Impl>::MooeeDag(const FermionField& psi, FermionField& chi)
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{
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int Ls = this->Ls;
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Vector<Coeff_t> diag = this->bee;
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Vector<Coeff_t> upper(Ls);
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Vector<Coeff_t> lower(Ls);
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for(int s=0; s<Ls; s++){
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upper[s] = -this->cee[s];
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lower[s] = -this->cee[s];
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}
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upper[Ls-1] = this->dp;
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lower[0] = this->dm;
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this->M5Ddag(psi, psi, chi, lower, diag, upper);
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}
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/****************************************************************************************/
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//Zolo
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template<class Impl>
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void DomainWallEOFAFermion<Impl>::SetCoefficientsInternal(RealD zolo_hi, Vector<Coeff_t>& gamma, RealD b, RealD c)
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{
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int Ls = this->Ls;
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int pm = this->pm;
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RealD mq1 = this->mq1;
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RealD mq2 = this->mq2;
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RealD mq3 = this->mq3;
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RealD shift = this->shift;
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////////////////////////////////////////////////////////
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// Constants for the preconditioned matrix Cayley form
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////////////////////////////////////////////////////////
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this->bs.resize(Ls);
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this->cs.resize(Ls);
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this->aee.resize(Ls);
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this->aeo.resize(Ls);
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this->bee.resize(Ls);
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this->beo.resize(Ls);
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this->cee.resize(Ls);
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this->ceo.resize(Ls);
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for(int i=0; i<Ls; ++i){
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this->bee[i] = 4.0 - this->M5 + 1.0;
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this->cee[i] = 1.0;
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}
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for(int i=0; i<Ls; ++i){
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this->aee[i] = this->cee[i];
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this->bs[i] = this->beo[i] = 1.0;
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this->cs[i] = this->ceo[i] = 0.0;
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}
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//////////////////////////////////////////
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// EOFA shift terms
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//////////////////////////////////////////
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if(pm == 1){
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this->dp = mq1*this->cee[0] + shift*(mq3-mq2);
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this->dm = mq1*this->cee[Ls-1];
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} else if(this->pm == -1) {
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this->dp = mq1*this->cee[0];
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this->dm = mq1*this->cee[Ls-1] - shift*(mq3-mq2);
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} else {
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this->dp = mq1*this->cee[0];
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this->dm = mq1*this->cee[Ls-1];
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}
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//////////////////////////////////////////
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// LDU decomposition of eeoo
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//////////////////////////////////////////
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this->dee.resize(Ls+1);
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this->lee.resize(Ls);
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this->leem.resize(Ls);
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this->uee.resize(Ls);
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this->ueem.resize(Ls);
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for(int i=0; i<Ls; ++i){
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if(i < Ls-1){
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this->lee[i] = -this->cee[i+1]/this->bee[i]; // sub-diag entry on the ith column
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this->leem[i] = this->dm/this->bee[i];
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for(int j=0; j<i; j++){ this->leem[i] *= this->aee[j]/this->bee[j]; }
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this->dee[i] = this->bee[i];
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this->uee[i] = -this->aee[i]/this->bee[i]; // up-diag entry on the ith row
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this->ueem[i] = this->dp / this->bee[0];
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for(int j=1; j<=i; j++){ this->ueem[i] *= this->cee[j]/this->bee[j]; }
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} else {
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this->lee[i] = 0.0;
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this->leem[i] = 0.0;
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this->uee[i] = 0.0;
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this->ueem[i] = 0.0;
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}
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}
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{
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Coeff_t delta_d = 1.0 / this->bee[0];
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for(int j=1; j<Ls-1; j++){ delta_d *= this->cee[j] / this->bee[j]; }
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this->dee[Ls-1] = this->bee[Ls-1] + this->cee[0] * this->dm * delta_d;
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this->dee[Ls] = this->bee[Ls-1] + this->cee[Ls-1] * this->dp * delta_d;
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}
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}
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// Recompute Cayley-form coefficients for different shift
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template<class Impl>
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void DomainWallEOFAFermion<Impl>::RefreshShiftCoefficients(RealD new_shift)
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{
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this->shift = new_shift;
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Approx::zolotarev_data *zdata = Approx::higham(1.0, this->Ls);
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this->SetCoefficientsTanh(zdata, 1.0, 0.0);
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}
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NAMESPACE_END(Grid);
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