portelli/Grid
1
0
Fork 0
mirror of https://github.com/paboyle/Grid.git synced 2025-04-03 18:55:56 +01:00
Code Releases Activity

Optimise lie algebra project

Browse Source
This commit is contained in:
Peter Boyle 2024-09-19 15:48:09 -04:00
parent da919949f9
commit bffd30abec
2 changed files with 22 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
Grid/qcd/utils/GaugeGroup.h
View File

@ -418,32 +418,32 @@ static void LieAlgebraProject(LatticeAlgebraMatrix &out,const LatticeMatrix &in,
int hNNm1= NNm1/2;
RealD sqrt_2 = sqrt(2.0);
Complex ci(0.0,1.0);
for(int su2Index=0;su2Index<hNNm1;su2Index++){
int i1, i2;
su2SubGroupIndex(i1, i2, su2Index);
int ax = su2Index*2;
int ay = su2Index*2+1;
accelerator_for(ss,grid->oSites(),1,{
const int nsimd= Matrix::Nsimd();
accelerator_for(ss,grid->oSites(),nsimd,{
for(int su2Index=0;su2Index<hNNm1;su2Index++){
int i1, i2;
su2SubGroupIndex(i1, i2, su2Index);
int ax = su2Index*2;
int ay = su2Index*2+1;
// in is traceless ANTI-hermitian whereas Grid generators are Hermitian.
// trace( Ta x Ci in)
// Bet I need to move to real part with mult by -i
out_v[ss]()()(ax,b) = 0.5*(real(in_v[ss]()()(i2,i1)) - real(in_v[ss]()()(i1,i2)));
out_v[ss]()()(ay,b) = 0.5*(imag(in_v[ss]()()(i1,i2)) + imag(in_v[ss]()()(i2,i1)));
});
}
for(int diagIndex=0;diagIndex<N-1;diagIndex++){
int k = diagIndex + 1; // diagIndex starts from 0
int a = NNm1+diagIndex;
RealD scale = 1.0/sqrt(2.0*k*(k+1));
accelerator_for(ss,grid->oSites(),vComplex::Nsimd(),{
auto tmp = in_v[ss]()()(0,0);
coalescedWrite(out_v[ss]()()(ax,b),0.5*(real(in_v(ss)()()(i2,i1)) - real(in_v(ss)()()(i1,i2))));
coalescedWrite(out_v[ss]()()(ay,b),0.5*(imag(in_v(ss)()()(i1,i2)) + imag(in_v(ss)()()(i2,i1))));
}
for(int diagIndex=0;diagIndex<N-1;diagIndex++){
int k = diagIndex + 1; // diagIndex starts from 0
int a = NNm1+diagIndex;
RealD scale = 1.0/sqrt(2.0*k*(k+1));
auto tmp = in_v(ss)()()(0,0);
for(int i=1;i<k;i++){
tmp=tmp+in_v[ss]()()(i,i);
tmp=tmp+in_v(ss)()()(i,i);
}
tmp = tmp - in_v[ss]()()(k,k)*k;
out_v[ss]()()(a,b) =imag(tmp) * scale;
});
}
tmp = tmp - in_v(ss)()()(k,k)*k;
coalescedWrite(out_v[ss]()()(a,b),imag(tmp) * scale);
}
});
}

2
Grid/qcd/utils/SUn.impl.h
View File

@ -118,7 +118,7 @@ static void generatorDiagonal(int diagIndex, iGroupMatrix<cplx> &ta) {
////////////////////////////////////////////////////////////////////////
// Map a su2 subgroup number to the pair of rows that are non zero
////////////////////////////////////////////////////////////////////////
static void su2SubGroupIndex(int &i1, int &i2, int su2_index, GroupName::SU) {
static accelerator_inline void su2SubGroupIndex(int &i1, int &i2, int su2_index, GroupName::SU) {
assert((su2_index >= 0) && (su2_index < (ncolour * (ncolour - 1)) / 2));
int spare = su2_index;