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114 lines
3.5 KiB
C++
114 lines
3.5 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./tests/Test_cshift.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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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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int threads = GridThread::GetThreads();
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std::cout<<GridLogMessage << "Grid is setup to use "<<threads<<" threads"<<std::endl;
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std::vector<int> latt_size = GridDefaultLatt();
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std::vector<int> simd_layout( { vComplexF::Nsimd(),1,1,1});
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std::vector<int> mpi_layout = GridDefaultMpi();
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int vol = 1;
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for(int d=0;d<latt_size.size();d++){
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vol = vol * latt_size[d];
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}
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GridCartesian Fine(latt_size,simd_layout,mpi_layout);
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LatticeComplexF one(&Fine);
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LatticeComplexF zz(&Fine);
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LatticeComplexF C(&Fine);
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LatticeComplexF Ctilde(&Fine);
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LatticeComplexF coor(&Fine);
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LatticeSpinMatrixF S(&Fine);
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LatticeSpinMatrixF Stilde(&Fine);
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std::vector<int> p({1,2,3,2});
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one = ComplexF(1.0,0.0);
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zz = ComplexF(0.0,0.0);
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ComplexF ci(0.0,1.0);
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C=zero;
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for(int mu=0;mu<4;mu++){
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RealD TwoPiL = M_PI * 2.0/ latt_size[mu];
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LatticeCoordinate(coor,mu);
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C = C + (TwoPiL * p[mu]) * coor;
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}
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C = exp(C*ci);
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S=zero;
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S = S+C;
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FFT theFFT(&Fine);
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Ctilde = C;
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theFFT.FFT_dim(Ctilde,Ctilde,0,FFT::forward); std::cout << theFFT.MFlops()<<std::endl;
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theFFT.FFT_dim(Ctilde,Ctilde,1,FFT::forward); std::cout << theFFT.MFlops()<<std::endl;
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theFFT.FFT_dim(Ctilde,Ctilde,2,FFT::forward); std::cout << theFFT.MFlops()<<std::endl;
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theFFT.FFT_dim(Ctilde,Ctilde,3,FFT::forward); std::cout << theFFT.MFlops()<<std::endl;
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// C=zero;
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// Ctilde = where(abs(Ctilde)<1.0e-10,C,Ctilde);
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TComplexF cVol;
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cVol()()() = vol;
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C=zero;
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pokeSite(cVol,C,p);
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C=C-Ctilde;
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std::cout << "diff scalar "<<norm2(C) << std::endl;
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Stilde = S;
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theFFT.FFT_dim(Stilde,Stilde,0,FFT::forward); std::cout << theFFT.MFlops()<< " "<<theFFT.USec() <<std::endl;
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theFFT.FFT_dim(Stilde,Stilde,1,FFT::forward); std::cout << theFFT.MFlops()<< " "<<theFFT.USec() <<std::endl;
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theFFT.FFT_dim(Stilde,Stilde,2,FFT::forward); std::cout << theFFT.MFlops()<< " "<<theFFT.USec() <<std::endl;
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theFFT.FFT_dim(Stilde,Stilde,3,FFT::forward); std::cout << theFFT.MFlops()<<" "<<theFFT.USec() <<std::endl;
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SpinMatrixF Sp;
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Sp = zero; Sp = Sp+cVol;
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S=zero;
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pokeSite(Sp,S,p);
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S= S-Stilde;
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std::cout << "diff FT[SpinMat] "<<norm2(S) << std::endl;
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Grid_finalize();
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}
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