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90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./tests/Test_wilson_cg_prec.cc
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Copyright (C) 2015
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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 std;
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using namespace Grid;
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using namespace Grid::QCD;
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template<class d>
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struct scal {
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d internal;
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};
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Gamma::GammaMatrix Gmu [] = {
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Gamma::GammaX,
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Gamma::GammaY,
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Gamma::GammaZ,
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Gamma::GammaT
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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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std::vector<int> latt_size = GridDefaultLatt();
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std::vector<int> simd_layout = GridDefaultSimd(Nd,vComplex::Nsimd());
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std::vector<int> mpi_layout = GridDefaultMpi();
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GridCartesian Grid(latt_size,simd_layout,mpi_layout);
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GridRedBlackCartesian RBGrid(latt_size,simd_layout,mpi_layout);
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std::vector<int> seeds({1,2,3,4});
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GridParallelRNG pRNG(&Grid); pRNG.SeedFixedIntegers(seeds);
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LatticeFermion src(&Grid); random(pRNG,src);
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RealD nrm = norm2(src);
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LatticeFermion result(&Grid); result=zero;
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LatticeGaugeField Umu(&Grid); random(pRNG,Umu);
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std::vector<LatticeColourMatrix> U(4,&Grid);
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for(int mu=0;mu<Nd;mu++){
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U[mu] = PeekIndex<LorentzIndex>(Umu,mu);
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}
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RealD mass=0.5;
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WilsonFermionR Dw(Umu,Grid,RBGrid,mass);
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// HermitianOperator<WilsonFermion,LatticeFermion> HermOp(Dw);
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// ConjugateGradient<LatticeFermion> CG(1.0e-8,10000);
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// CG(HermOp,src,result);
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LatticeFermion src_o(&RBGrid);
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LatticeFermion result_o(&RBGrid);
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pickCheckerboard(Odd,src_o,src);
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result_o=zero;
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SchurDiagMooeeOperator<WilsonFermionR,LatticeFermion> HermOpEO(Dw);
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ConjugateGradient<LatticeFermion> CG(1.0e-8,10000);
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CG(HermOpEO,src_o,result_o);
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Grid_finalize();
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}
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