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