mirror of
https://github.com/paboyle/Grid.git
synced 2024-09-20 17:25:37 +01:00
86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
#include <Grid.h>
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using namespace Grid;
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using namespace Grid::QCD;
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int main (int argc, char ** argv)
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{
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Grid_init(&argc,&argv);
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std::vector<int> latt_size = GridDefaultLatt();
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std::vector<int> simd_layout = GridDefaultSimd(4,vComplexF::Nsimd());
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std::vector<int> mpi_layout = GridDefaultMpi();
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GridCartesian Fine(latt_size,simd_layout,mpi_layout);
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GridParallelRNG FineRNG(&Fine); FineRNG.SeedRandomDevice();
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LatticeComplex U(&Fine);
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LatticeComplex ShiftU(&Fine);
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LatticeComplex lex(&Fine);
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lex=zero;
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Integer stride =1;
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{
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double nrm;
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LatticeComplex coor(&Fine);
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for(int d=0;d<4;d++){
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LatticeCoordinate(coor,d);
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lex = lex + coor*stride;
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stride=stride*latt_size[d];
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}
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U=lex;
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}
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TComplex cm;
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for(int dir=0;dir<4;dir++){
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for(int shift=0;shift<latt_size[dir];shift++){
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if ( Fine.IsBoss() )
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std::cout<<"Shifting by "<<shift<<" in direction"<<dir<<std::endl;
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ShiftU = Cshift(U,dir,shift); // Shift everything
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std::vector<int> coor(4);
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for(coor[3]=0;coor[3]<latt_size[3];coor[3]++){
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for(coor[2]=0;coor[2]<latt_size[2];coor[2]++){
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for(coor[1]=0;coor[1]<latt_size[1];coor[1]++){
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for(coor[0]=0;coor[0]<latt_size[0];coor[0]++){
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peekSite(cm,ShiftU,coor);
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double nrm=norm2(U);
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std::vector<int> scoor(coor);
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scoor[dir] = (scoor[dir]+shift)%latt_size[dir];
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Integer slex = scoor[0]
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+ latt_size[0]*scoor[1]
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+ latt_size[0]*latt_size[1]*scoor[2]
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+ latt_size[0]*latt_size[1]*latt_size[2]*scoor[3];
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Complex scm(slex);
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nrm = abs(scm-cm()()());
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std::vector<int> peer(4);
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Complex tmp =cm;
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Integer index=real(tmp);
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Fine.CoorFromIndex(peer,index,latt_size);
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if (nrm > 0){
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std::cerr<<"FAIL shift "<< shift<<" in dir "<< dir<<" ["<<coor[0]<<","<<coor[1]<<","<<coor[2]<<","<<coor[3]<<"] = "<< cm()()()<<" expect "<<scm<<" "<<nrm<<std::endl;
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std::cerr<<"Got "<<index<<" " << peer[0]<<","<<peer[1]<<","<<peer[2]<<","<<peer[3]<<std::endl;
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index=real(scm);
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Fine.CoorFromIndex(peer,index,latt_size);
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std::cerr<<"Expect "<<index<<" " << peer[0]<<","<<peer[1]<<","<<peer[2]<<","<<peer[3]<<std::endl;
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}
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}}}}
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}
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}
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Grid_finalize();
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}
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