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G5 on coarse spaces

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This commit is contained in:
Peter Boyle 2021-01-14 20:47:28 -05:00
parent eaff0f3aeb
commit d8fa903b02
1 changed files with 22 additions and 6 deletions
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28
Grid/qcd/utils/LinalgUtils.h
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@ -154,8 +154,8 @@ void axpby_ssp_pminus(Lattice<vobj> &z,Coeff a,const Lattice<vobj> &x,Coeff b,co
accelerator_for(sss,nloop,vobj::Nsimd(),{
uint64_t ss = sss*Ls;
decltype(coalescedRead(y_v[ss+sp])) tmp;
spProj5m(tmp,y_v(ss+sp));
tmp = a*x_v(ss+s)+b*tmp;
spProj5m(tmp,y_v(ss+sp));
tmp = a*x_v(ss+s)+b*tmp;
coalescedWrite(z_v[ss+s],tmp);
});
}
@ -188,7 +188,6 @@ void G5R5(Lattice<vobj> &z,const Lattice<vobj> &x)
z.Checkerboard() = x.Checkerboard();
conformable(x,z);
int Ls = grid->_rdimensions[0];
Gamma G5(Gamma::Algebra::Gamma5);
autoView( x_v, x, AcceleratorRead);
autoView( z_v, z, AcceleratorWrite);
uint64_t nloop = grid->oSites()/Ls;
@ -196,7 +195,13 @@ void G5R5(Lattice<vobj> &z,const Lattice<vobj> &x)
uint64_t ss = sss*Ls;
for(int s=0;s<Ls;s++){
int sp = Ls-1-s;
coalescedWrite(z_v[ss+sp],G5*x_v(ss+s));
auto tmp = x_v(ss+s);
decltype(tmp) tmp_p;
decltype(tmp) tmp_m;
spProj5p(tmp_p,tmp);
spProj5m(tmp_m,tmp);
// Use of spProj5m, 5p captures the coarse space too
coalescedWrite(z_v[ss+sp],tmp_p - tmp_m);
}
});
}
@ -208,10 +213,20 @@ void G5C(Lattice<vobj> &z, const Lattice<vobj> &x)
z.Checkerboard() = x.Checkerboard();
conformable(x, z);
Gamma G5(Gamma::Algebra::Gamma5);
z = G5 * x;
autoView( x_v, x, AcceleratorRead);
autoView( z_v, z, AcceleratorWrite);
uint64_t nloop = grid->oSites();
accelerator_for(ss,nloop,vobj::Nsimd(),{
auto tmp = x_v(ss);
decltype(tmp) tmp_p;
decltype(tmp) tmp_m;
spProj5p(tmp_p,tmp);
spProj5m(tmp_m,tmp);
coalescedWrite(z_v[ss],tmp_p - tmp_m);
});
}
/*
template<class CComplex, int nbasis>
void G5C(Lattice<iVector<CComplex, nbasis>> &z, const Lattice<iVector<CComplex, nbasis>> &x)
{
@ -234,6 +249,7 @@ void G5C(Lattice<iVector<CComplex, nbasis>> &z, const Lattice<iVector<CComplex,
}
});
}
*/
NAMESPACE_END(Grid);