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https://github.com/paboyle/Grid.git
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274 lines
7.7 KiB
C++
274 lines
7.7 KiB
C++
#include <Grid.h>
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namespace Grid {
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namespace QCD {
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const std::vector<int> WilsonFermion::directions ({0,1,2,3, 0, 1, 2, 3});
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const std::vector<int> WilsonFermion::displacements({1,1,1,1,-1,-1,-1,-1});
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int WilsonFermion::HandOptDslash;
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WilsonFermion::WilsonFermion(LatticeGaugeField &_Umu,
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GridCartesian &Fgrid,
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GridRedBlackCartesian &Hgrid,
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RealD _mass) :
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_grid(&Fgrid),
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_cbgrid(&Hgrid),
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Stencil (&Fgrid,npoint,Even,directions,displacements),
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StencilEven(&Hgrid,npoint,Even,directions,displacements), // source is Even
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StencilOdd (&Hgrid,npoint,Odd ,directions,displacements), // source is Odd
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mass(_mass),
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Umu(&Fgrid),
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UmuEven(&Hgrid),
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UmuOdd (&Hgrid)
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{
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// Allocate the required comms buffer
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comm_buf.resize(Stencil._unified_buffer_size); // this is always big enough to contain EO
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ImportGauge(_Umu);
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}
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void WilsonFermion::ImportGauge(const LatticeGaugeField &_Umu)
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{
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DoubleStore(Umu,_Umu);
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pickCheckerboard(Even,UmuEven,Umu);
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pickCheckerboard(Odd ,UmuOdd,Umu);
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}
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void WilsonFermion::DoubleStore(LatticeDoubledGaugeField &Uds,const LatticeGaugeField &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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LatticeColourMatrix U(GaugeGrid());
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for(int mu=0;mu<Nd;mu++){
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U = PeekIndex<LorentzIndex>(Umu,mu);
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PokeIndex<LorentzIndex>(Uds,U,mu);
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U = adj(Cshift(U,mu,-1));
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PokeIndex<LorentzIndex>(Uds,U,mu+4);
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}
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}
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RealD WilsonFermion::M(const LatticeFermion &in, LatticeFermion &out)
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{
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out.checkerboard=in.checkerboard;
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Dhop(in,out,DaggerNo);
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return axpy_norm(out,4+mass,in,out);
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}
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RealD WilsonFermion::Mdag(const LatticeFermion &in, LatticeFermion &out)
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{
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out.checkerboard=in.checkerboard;
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Dhop(in,out,DaggerYes);
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return axpy_norm(out,4+mass,in,out);
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}
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void WilsonFermion::Meooe(const LatticeFermion &in, LatticeFermion &out)
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{
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if ( in.checkerboard == Odd ) {
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DhopEO(in,out,DaggerNo);
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} else {
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DhopOE(in,out,DaggerNo);
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}
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}
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void WilsonFermion::MeooeDag(const LatticeFermion &in, LatticeFermion &out)
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{
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if ( in.checkerboard == Odd ) {
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DhopEO(in,out,DaggerYes);
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} else {
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DhopOE(in,out,DaggerYes);
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}
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}
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void WilsonFermion::Mooee(const LatticeFermion &in, LatticeFermion &out)
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{
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out.checkerboard = in.checkerboard;
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out = (4.0+mass)*in;
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return ;
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}
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void WilsonFermion::MooeeDag(const LatticeFermion &in, LatticeFermion &out)
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{
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out.checkerboard = in.checkerboard;
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Mooee(in,out);
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}
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void WilsonFermion::MooeeInv(const LatticeFermion &in, LatticeFermion &out)
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{
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out.checkerboard = in.checkerboard;
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out = (1.0/(4.0+mass))*in;
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return ;
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}
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void WilsonFermion::MooeeInvDag(const LatticeFermion &in, LatticeFermion &out)
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{
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out.checkerboard = in.checkerboard;
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MooeeInv(in,out);
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}
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void WilsonFermion::Mdir (const LatticeFermion &in, LatticeFermion &out,int dir,int disp)
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{
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DhopDir(in,out,dir,disp);
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}
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void WilsonFermion::DhopDir(const LatticeFermion &in, LatticeFermion &out,int dir,int disp){
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WilsonCompressor compressor(DaggerNo);
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Stencil.HaloExchange<vSpinColourVector,vHalfSpinColourVector,WilsonCompressor>(in,comm_buf,compressor);
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assert( (disp==1)||(disp==-1) );
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int skip = (disp==1) ? 0 : 1;
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int dirdisp = dir+skip*4;
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PARALLEL_FOR_LOOP
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for(int sss=0;sss<in._grid->oSites();sss++){
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DiracOptDhopDir(Stencil,Umu,comm_buf,sss,sss,in,out,dirdisp,dirdisp);
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}
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};
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void WilsonFermion::DhopDirDisp(const LatticeFermion &in, LatticeFermion &out,int dirdisp,int gamma,int dag)
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{
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WilsonCompressor compressor(dag);
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Stencil.HaloExchange<vSpinColourVector,vHalfSpinColourVector,WilsonCompressor>(in,comm_buf,compressor);
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PARALLEL_FOR_LOOP
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for(int sss=0;sss<in._grid->oSites();sss++){
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DiracOptDhopDir(Stencil,Umu,comm_buf,sss,sss,in,out,dirdisp,gamma);
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}
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};
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void WilsonFermion::DhopInternal(CartesianStencil & st,LatticeDoubledGaugeField & U,
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const LatticeFermion &in, LatticeFermion &out,int dag)
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{
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assert((dag==DaggerNo) ||(dag==DaggerYes));
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WilsonCompressor compressor(dag);
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st.HaloExchange<vSpinColourVector,vHalfSpinColourVector,WilsonCompressor>(in,comm_buf,compressor);
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if ( dag == DaggerYes ) {
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if( HandOptDslash ) {
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PARALLEL_FOR_LOOP
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for(int sss=0;sss<in._grid->oSites();sss++){
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DiracOptHandDhopSiteDag(st,U,comm_buf,sss,sss,in,out);
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}
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} else {
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PARALLEL_FOR_LOOP
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for(int sss=0;sss<in._grid->oSites();sss++){
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DiracOptDhopSiteDag(st,U,comm_buf,sss,sss,in,out);
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}
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}
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} else {
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if( HandOptDslash ) {
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PARALLEL_FOR_LOOP
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for(int sss=0;sss<in._grid->oSites();sss++){
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DiracOptHandDhopSite(st,U,comm_buf,sss,sss,in,out);
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}
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} else {
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PARALLEL_FOR_LOOP
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for(int sss=0;sss<in._grid->oSites();sss++){
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DiracOptDhopSite(st,U,comm_buf,sss,sss,in,out);
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}
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}
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}
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}
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void WilsonFermion::DhopOE(const LatticeFermion &in, LatticeFermion &out,int dag)
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{
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conformable(in._grid,_cbgrid); // verifies half grid
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conformable(in._grid,out._grid); // drops the cb check
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assert(in.checkerboard==Even);
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out.checkerboard = Odd;
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DhopInternal(StencilEven,UmuOdd,in,out,dag);
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}
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void WilsonFermion::DhopEO(const LatticeFermion &in, LatticeFermion &out,int dag)
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{
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conformable(in._grid,_cbgrid); // verifies half grid
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conformable(in._grid,out._grid); // drops the cb check
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assert(in.checkerboard==Odd);
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out.checkerboard = Even;
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DhopInternal(StencilOdd,UmuEven,in,out,dag);
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}
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void WilsonFermion::Dhop(const LatticeFermion &in, LatticeFermion &out,int dag)
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{
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conformable(in._grid,_grid); // verifies full grid
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conformable(in._grid,out._grid);
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out.checkerboard = in.checkerboard;
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DhopInternal(Stencil,Umu,in,out,dag);
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}
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void WilsonFermion::DerivInternal(CartesianStencil & st,LatticeDoubledGaugeField & U,
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LatticeGaugeField &mat,const LatticeFermion &A,const LatticeFermion &B,int dag)
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{
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assert((dag==DaggerNo) ||(dag==DaggerYes));
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WilsonCompressor compressor(dag);
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LatticeColourMatrix tmp(B._grid);
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LatticeFermion Btilde(B._grid);
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st.HaloExchange<vSpinColourVector,vHalfSpinColourVector,WilsonCompressor>(B,comm_buf,compressor);
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for(int mu=0;mu<Nd;mu++){
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////////////////////////////////////////////////////////////////////////
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// Flip gamma (1+g)<->(1-g) if dag
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////////////////////////////////////////////////////////////////////////
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int gamma = mu;
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if ( dag ) gamma+= Nd;
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////////////////////////
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// Call the single hop
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////////////////////////
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PARALLEL_FOR_LOOP
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for(int sss=0;sss<B._grid->oSites();sss++){
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DiracOptDhopDir(st,U,comm_buf,sss,sss,B,Btilde,mu,gamma);
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}
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//////////////////////////////////////////////////
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// spin trace outer product
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//////////////////////////////////////////////////
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tmp = TraceIndex<SpinIndex>(outerProduct(Btilde,A));
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PokeIndex<LorentzIndex>(mat,tmp,mu);
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}
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}
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void WilsonFermion::DhopDeriv(LatticeGaugeField &mat,const LatticeFermion &U,const LatticeFermion &V,int dag)
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{
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conformable(U._grid,_grid);
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conformable(U._grid,V._grid);
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conformable(U._grid,mat._grid);
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mat.checkerboard = U.checkerboard;
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DerivInternal(Stencil,Umu,mat,U,V,dag);
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}
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void WilsonFermion::DhopDerivOE(LatticeGaugeField &mat,const LatticeFermion &U,const LatticeFermion &V,int dag)
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{
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conformable(U._grid,_cbgrid);
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conformable(U._grid,V._grid);
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conformable(U._grid,mat._grid);
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assert(V.checkerboard==Even);
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assert(U.checkerboard==Odd);
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mat.checkerboard = Odd;
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DerivInternal(StencilEven,UmuOdd,mat,U,V,dag);
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}
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void WilsonFermion::DhopDerivEO(LatticeGaugeField &mat,const LatticeFermion &U,const LatticeFermion &V,int dag)
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{
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conformable(U._grid,_cbgrid);
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conformable(U._grid,V._grid);
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conformable(U._grid,mat._grid);
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assert(V.checkerboard==Odd);
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assert(U.checkerboard==Even);
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mat.checkerboard = Even;
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DerivInternal(StencilOdd,UmuEven,mat,U,V,dag);
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}
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}}
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