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Basic where test

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Peter Boyle 2020-08-31 23:55:49 -04:00
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commit 3d27708f07
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tests/core/Test_where.cc Normal file
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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./tests/Test_poisson_fft.cc
Copyright (C) 2015
Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#include <Grid/Grid.h>
using namespace Grid;
;
int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
int threads = GridThread::GetThreads();
std::cout<<GridLogMessage << "Grid is setup to use "<<threads<<" threads"<<std::endl;
int N=16;
std::vector<int> latt_size ({N,4,4});
std::vector<int> simd_layout({vComplexD::Nsimd(),1,1});
std::vector<int> mpi_layout ({1,1,1});
int vol = 1;
int nd = latt_size.size();
for(int d=0;d<nd;d++){
vol = vol * latt_size[d];
}
GridCartesian GRID(latt_size,simd_layout,mpi_layout);
LatticeComplexD zz(&GRID);
LatticeInteger coor(&GRID);
LatticeComplexD rn(&GRID);
LatticeComplexD sl(&GRID);
zz = ComplexD(0.0,0.0);
GridParallelRNG RNG(&GRID);
RNG.SeedFixedIntegers(std::vector<int>({45,12,81,9}));
gaussian(RNG,rn);
RealD nn=norm2(rn);
for(int mu=0;mu<nd;mu++){
RealD ns=0.0;
for(int t=0;t<latt_size[mu];t++){
LatticeCoordinate(coor,mu);
sl=where(coor==Integer(t),rn,zz);
std::cout <<GridLogMessage<< " sl " << sl<<std::endl;
std::cout <<GridLogMessage<<" slice "<<t<<" " << norm2(sl)<<std::endl;
ns=ns+norm2(sl);
}
std::cout <<GridLogMessage <<" sliceNorm" <<mu<<" "<< nn <<" "<<ns<<" " << nn-ns<<std::endl;
}
Grid_finalize();
}