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https://github.com/paboyle/Grid.git
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297 lines
8.1 KiB
C++
297 lines
8.1 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> WilsonFermionStatic::directions ({0,1,2,3, 0, 1, 2, 3});
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const std::vector<int> WilsonFermionStatic::displacements({1,1,1,1,-1,-1,-1,-1});
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int WilsonFermionStatic::HandOptDslash;
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/////////////////////////////////
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// Constructor and gauge import
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/////////////////////////////////
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template<class Impl>
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WilsonFermion<Impl>::WilsonFermion(GaugeField &_Umu,
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GridCartesian &Fgrid,
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GridRedBlackCartesian &Hgrid,
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RealD _mass,const ImplParams &p) :
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Kernels(p),
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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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template<class Impl>
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void WilsonFermion<Impl>::ImportGauge(const GaugeField &_Umu)
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{
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Impl::DoubleStore(GaugeGrid(),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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/////////////////////////////
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// Implement the interface
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/////////////////////////////
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template<class Impl>
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RealD WilsonFermion<Impl>::M(const FermionField &in, FermionField &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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template<class Impl>
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RealD WilsonFermion<Impl>::Mdag(const FermionField &in, FermionField &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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template<class Impl>
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void WilsonFermion<Impl>::Meooe(const FermionField &in, FermionField &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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template<class Impl>
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void WilsonFermion<Impl>::MeooeDag(const FermionField &in, FermionField &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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template<class Impl>
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void WilsonFermion<Impl>::Mooee(const FermionField &in, FermionField &out) {
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out.checkerboard = in.checkerboard;
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typename FermionField::scalar_type scal(4.0+mass);
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out = scal*in;
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}
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template<class Impl>
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void WilsonFermion<Impl>::MooeeDag(const FermionField &in, FermionField &out) {
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out.checkerboard = in.checkerboard;
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Mooee(in,out);
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}
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template<class Impl>
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void WilsonFermion<Impl>::MooeeInv(const FermionField &in, FermionField &out) {
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out.checkerboard = in.checkerboard;
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out = (1.0/(4.0+mass))*in;
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}
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template<class Impl>
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void WilsonFermion<Impl>::MooeeInvDag(const FermionField &in, FermionField &out) {
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out.checkerboard = in.checkerboard;
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MooeeInv(in,out);
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}
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///////////////////////////////////
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// Internal
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///////////////////////////////////
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template<class Impl>
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void WilsonFermion<Impl>::DerivInternal(StencilImpl & st,
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DoubledGaugeField & U,
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GaugeField &mat,
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const FermionField &A,
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const FermionField &B,int dag) {
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assert((dag==DaggerNo) ||(dag==DaggerYes));
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Compressor compressor(dag);
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FermionField Btilde(B._grid);
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FermionField Atilde(B._grid);
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Atilde = A;
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st.HaloExchange(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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Kernels::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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Impl::InsertForce4D(mat,Btilde,Atilde,mu);
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}
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}
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template<class Impl>
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void WilsonFermion<Impl>::DhopDeriv(GaugeField &mat,const FermionField &U,const FermionField &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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template<class Impl>
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void WilsonFermion<Impl>::DhopDerivOE(GaugeField &mat,const FermionField &U,const FermionField &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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template<class Impl>
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void WilsonFermion<Impl>::DhopDerivEO(GaugeField &mat,const FermionField &U,const FermionField &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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template<class Impl>
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void WilsonFermion<Impl>::Dhop(const FermionField &in, FermionField &out,int dag) {
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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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template<class Impl>
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void WilsonFermion<Impl>::DhopOE(const FermionField &in, FermionField &out,int dag) {
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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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template<class Impl>
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void WilsonFermion<Impl>::DhopEO(const FermionField &in, FermionField &out,int dag) {
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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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template<class Impl>
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void WilsonFermion<Impl>::Mdir (const FermionField &in, FermionField &out,int dir,int disp) {
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DhopDir(in,out,dir,disp);
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}
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template<class Impl>
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void WilsonFermion<Impl>::DhopDir(const FermionField &in, FermionField &out,int dir,int disp){
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int skip = (disp==1) ? 0 : 1;
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int dirdisp = dir+skip*4;
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DhopDirDisp(in,out,dirdisp,dirdisp,DaggerNo);
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};
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template<class Impl>
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void WilsonFermion<Impl>::DhopDirDisp(const FermionField &in, FermionField &out,int dirdisp,int gamma,int dag) {
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Compressor compressor(dag);
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Stencil.HaloExchange(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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Kernels::DiracOptDhopDir(Stencil,Umu,comm_buf,sss,sss,in,out,dirdisp,gamma);
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}
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};
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template<class Impl>
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void WilsonFermion<Impl>::DhopInternal(StencilImpl & st,DoubledGaugeField & U,
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const FermionField &in, FermionField &out,int dag) {
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assert((dag==DaggerNo) ||(dag==DaggerYes));
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Compressor compressor(dag);
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st.HaloExchange(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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Kernels::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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Kernels::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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Kernels::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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Kernels::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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FermOpTemplateInstantiate(WilsonFermion);
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}}
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