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86 lines
2.9 KiB
C++
86 lines
2.9 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: Hadrons/Modules/MSolver/Guesser.hpp
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Copyright (C) 2015-2019
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Author: Antonin Portelli <antonin.portelli@me.com>
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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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#ifndef Hadrons_MSolver_Guesser_hpp_
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#define Hadrons_MSolver_Guesser_hpp_
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#include <Hadrons/Global.hpp>
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#include <Hadrons/EigenPack.hpp>
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BEGIN_HADRONS_NAMESPACE
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BEGIN_MODULE_NAMESPACE(MSolver)
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template <typename FImpl, int nBasis>
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std::shared_ptr<LinearFunction<typename FImpl::FermionField>>
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makeGuesser(const std::string epackName)
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{
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typedef typename FImpl::FermionField FermionField;
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typedef BaseFermionEigenPack<FImpl> EPack;
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typedef CoarseFermionEigenPack<FImpl, nBasis> CoarseEPack;
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typedef DeflatedGuesser<FermionField> FineGuesser;
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typedef LocalCoherenceDeflatedGuesser<
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FermionField, typename CoarseEPack::CoarseField> CoarseGuesser;
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std::shared_ptr<LinearFunction<typename FImpl::FermionField>> guesserPt;
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DEFINE_ENV_LAMBDA;
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if (epackName.empty())
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{
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guesserPt.reset(new ZeroGuesser<FermionField>());
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}
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else
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{
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try
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{
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auto &epack = envGetDerived(EPack, CoarseEPack, epackName);
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LOG(Message) << "using low-mode deflation with coarse eigenpack '"
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<< epackName << "' ("
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<< epack.evecCoarse.size() << " modes)" << std::endl;
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guesserPt.reset(new CoarseGuesser(epack.evec, epack.evecCoarse,
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epack.evalCoarse));
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}
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catch (Exceptions::ObjectType &e)
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{
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auto &epack = envGet(EPack, epackName);
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LOG(Message) << "using low-mode deflation with eigenpack '"
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<< epackName << "' ("
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<< epack.evec.size() << " modes)" << std::endl;
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guesserPt.reset(new FineGuesser(epack.evec, epack.eval));
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}
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}
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return guesserPt;
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}
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END_MODULE_NAMESPACE
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END_HADRONS_NAMESPACE
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#endif
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