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216 lines
6.7 KiB
C++
216 lines
6.7 KiB
C++
#include <Grid.h>
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namespace Grid {
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namespace QCD {
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// S-direction is INNERMOST and takes no part in the parity.
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const std::vector<int> WilsonFermion5D::directions ({1,2,3,4, 1, 2, 3, 4});
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const std::vector<int> WilsonFermion5D::displacements({1,1,1,1,-1,-1,-1,-1});
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int WilsonFermion5D::HandOptDslash;
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// 5d lattice for DWF.
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WilsonFermion5D::WilsonFermion5D(LatticeGaugeField &_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 _M5) :
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_FiveDimGrid(&FiveDimGrid),
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_FiveDimRedBlackGrid(&FiveDimRedBlackGrid),
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_FourDimGrid(&FourDimGrid),
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_FourDimRedBlackGrid(&FourDimRedBlackGrid),
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Stencil (_FiveDimGrid,npoint,Even,directions,displacements),
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StencilEven(_FiveDimRedBlackGrid,npoint,Even,directions,displacements), // source is Even
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StencilOdd (_FiveDimRedBlackGrid,npoint,Odd ,directions,displacements), // source is Odd
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M5(_M5),
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Umu(_FourDimGrid),
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UmuEven(_FourDimRedBlackGrid),
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UmuOdd (_FourDimRedBlackGrid),
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Lebesgue(_FourDimGrid),
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LebesgueEvenOdd(_FourDimRedBlackGrid)
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{
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// some assertions
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assert(FiveDimGrid._ndimension==5);
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assert(FourDimGrid._ndimension==4);
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assert(FiveDimRedBlackGrid._ndimension==5);
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assert(FourDimRedBlackGrid._ndimension==4);
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assert(FiveDimRedBlackGrid._checker_dim==1);
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// Dimension zero of the five-d is the Ls direction
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Ls=FiveDimGrid._fdimensions[0];
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assert(FiveDimRedBlackGrid._fdimensions[0]==Ls);
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assert(FiveDimRedBlackGrid._processors[0] ==1);
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assert(FiveDimRedBlackGrid._simd_layout[0]==1);
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assert(FiveDimGrid._processors[0] ==1);
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assert(FiveDimGrid._simd_layout[0] ==1);
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// Other dimensions must match the decomposition of the four-D fields
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for(int d=0;d<4;d++){
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assert(FourDimRedBlackGrid._fdimensions[d] ==FourDimGrid._fdimensions[d]);
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assert(FiveDimRedBlackGrid._fdimensions[d+1]==FourDimGrid._fdimensions[d]);
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assert(FourDimRedBlackGrid._processors[d] ==FourDimGrid._processors[d]);
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assert(FiveDimRedBlackGrid._processors[d+1] ==FourDimGrid._processors[d]);
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assert(FourDimRedBlackGrid._simd_layout[d] ==FourDimGrid._simd_layout[d]);
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assert(FiveDimRedBlackGrid._simd_layout[d+1]==FourDimGrid._simd_layout[d]);
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assert(FiveDimGrid._fdimensions[d+1] ==FourDimGrid._fdimensions[d]);
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assert(FiveDimGrid._processors[d+1] ==FourDimGrid._processors[d]);
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assert(FiveDimGrid._simd_layout[d+1] ==FourDimGrid._simd_layout[d]);
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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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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 WilsonFermion5D::DoubleStore(LatticeDoubledGaugeField &Uds,const LatticeGaugeField &Umu)
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{
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assert(GaugeGrid()->_ndimension==4);
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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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void WilsonFermion5D::DhopDir(const LatticeFermion &in, LatticeFermion &out,int dir5,int disp)
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{
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int dir = dir5-1; // Maps to the ordering above in "directions" that is passed to stencil
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// we drop off the innermost fifth dimension
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assert( (disp==1)||(disp==-1) );
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assert( (dir>=0)&&(dir<4) ); //must do x,y,z or t;
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WilsonCompressor compressor(DaggerNo);
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Stencil.HaloExchange<vSpinColourVector,vHalfSpinColourVector,WilsonCompressor>(in,comm_buf,compressor);
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int skip = (disp==1) ? 0 : 1;
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int dirdisp = dir+skip*4;
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assert(dirdisp<=7);
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assert(dirdisp>=0);
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PARALLEL_FOR_LOOP
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for(int ss=0;ss<Umu._grid->oSites();ss++){
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for(int s=0;s<Ls;s++){
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int sU=ss;
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int sF = s+Ls*sU;
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DiracOpt::DhopDir(Stencil,Umu,comm_buf,sF,sU,in,out,dirdisp);
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}
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}
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};
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void WilsonFermion5D::DhopInternal(CartesianStencil & st, LebesgueOrder &lo,
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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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// Dhop takes the 4d grid from U, and makes a 5d index for fermion
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// Not loop ordering and data layout.
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// Designed to create
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// - per thread reuse in L1 cache for U
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// - 8 linear access unit stride streams per thread for Fermion for hw prefetchable.
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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 ss=0;ss<U._grid->oSites();ss++){
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for(int s=0;s<Ls;s++){
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//int sU=lo.Reorder(ss);
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int sU=ss;
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int sF = s+Ls*sU;
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DiracOptHand::DhopSiteDag(st,U,comm_buf,sF,sU,in,out);
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}
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}
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} else {
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PARALLEL_FOR_LOOP
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for(int ss=0;ss<U._grid->oSites();ss++){
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for(int s=0;s<Ls;s++){
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// int sU=lo.Reorder(ss);
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int sU=ss;
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int sF = s+Ls*sU;
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DiracOpt::DhopSiteDag(st,U,comm_buf,sF,sU,in,out);
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}
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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 ss=0;ss<U._grid->oSites();ss++){
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for(int s=0;s<Ls;s++){
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// int sU=lo.Reorder(ss);
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int sU=ss;
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int sF = s+Ls*sU;
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DiracOptHand::DhopSite(st,U,comm_buf,sF,sU,in,out);
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}
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}
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} else {
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PARALLEL_FOR_LOOP
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for(int ss=0;ss<U._grid->oSites();ss++){
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for(int s=0;s<Ls;s++){
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// int sU=lo.Reorder(ss);
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int sU=ss;
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int sF = s+Ls*sU;
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DiracOpt::DhopSite(st,U,comm_buf,sF,sU,in,out);
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}
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}
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}
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}
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}
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void WilsonFermion5D::DhopOE(const LatticeFermion &in, LatticeFermion &out,int dag)
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{
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conformable(in._grid,FermionRedBlackGrid()); // 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,LebesgueEvenOdd,UmuOdd,in,out,dag);
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}
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void WilsonFermion5D::DhopEO(const LatticeFermion &in, LatticeFermion &out,int dag)
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{
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conformable(in._grid,FermionRedBlackGrid()); // 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,LebesgueEvenOdd,UmuEven,in,out,dag);
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}
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void WilsonFermion5D::Dhop(const LatticeFermion &in, LatticeFermion &out,int dag)
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{
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conformable(in._grid,FermionGrid()); // 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,Lebesgue,Umu,in,out,dag);
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}
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void WilsonFermion5D::DW(const LatticeFermion &in, LatticeFermion &out,int dag)
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{
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out.checkerboard=in.checkerboard;
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Dhop(in,out,dag); // -0.5 is included
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axpy(out,4.0-M5,in,out);
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}
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}
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}
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