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Replaced slow unpack-repack in G-parity BC twist with intrinsics version

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This commit is contained in:
Christopher Kelly 2017-08-22 18:12:12 -04:00
parent ab50145001
commit 061e48fd73
1 changed files with 26 additions and 0 deletions
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26
lib/qcd/action/fermion/FermionOperatorImpl.h
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@ -565,6 +565,7 @@ class GparityWilsonImpl : public ConjugateGaugeImpl<GaugeImplTypes<S, Nrepresent
template<typename SiteSpinorType>
void GparityTwistPermute(SiteSpinorType &into, const SiteSpinorType &from, const int direction, const int distance, const int perm, GridBase* grid){
#if 0
typedef typename SiteSpinorType::scalar_object sobj;
sobj stmp;
std::vector<sobj> vals(grid->Nsimd());
@ -589,6 +590,31 @@ class GparityWilsonImpl : public ConjugateGaugeImpl<GaugeImplTypes<S, Nrepresent
}
}
merge(into,vals);
#else
int permute_type = grid->PermuteType(direction);
typedef typename SiteSpinorType::vector_type vtype;
vtype tmp1, tmp2, tmp3, tmp4;
for(int s=0;s<Ns;s++){
for(int c=0;c<Nrepresentation;c++){
permute(tmp1, from(1)(s)(c), permute_type); //1l 1h -> 1h 1l
exchange(tmp2,tmp3, from(0)(s)(c), tmp1, permute_type); // 0l 0h , 1h 1l -> 0l 1h 0h,1l
permute(tmp4, tmp3, permute_type); //0h,1l -> 1l,0h
if( (distance == 1 && !perm) || (distance == -1 && perm) ){
//Pulled fermion through forwards face, GPBC on upper component
//Need 0= 0l 1h 1= 1l 0h
into(0)(s)(c) = tmp2;
into(1)(s)(c) = tmp4;
}else if( (distance == -1 && !perm) || (distance == 1 && perm) ){
//Pulled fermion through backwards face, GPBC on lower component
//Need 0= 1l 0h 1= 0l 1h
into(0)(s)(c) = tmp4;
into(1)(s)(c) = tmp2;
}else assert(0);
}
}
#endif
}