mirror of
https://github.com/paboyle/Grid.git
synced 2024-09-20 17:25:37 +01:00
116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
/*************************************************************************************
|
|
|
|
Grid physics library, www.github.com/paboyle/Grid
|
|
|
|
Source file: extras/Hadrons/LanczosUtils.hpp
|
|
|
|
Copyright (C) 2015-2018
|
|
|
|
Author: Antonin Portelli <antonin.portelli@me.com>
|
|
|
|
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 */
|
|
#ifndef Hadrons_LanczosUtils_hpp_
|
|
#define Hadrons_LanczosUtils_hpp_
|
|
|
|
#include <Grid/Hadrons/Global.hpp>
|
|
#include <Grid/algorithms/iterative/LocalCoherenceLanczos.h>
|
|
|
|
BEGIN_HADRONS_NAMESPACE
|
|
|
|
// Lanczos type
|
|
#ifndef HADRONS_DEFAULT_LANCZOS_NBASIS
|
|
#define HADRONS_DEFAULT_LANCZOS_NBASIS 60
|
|
#endif
|
|
|
|
template <typename T>
|
|
struct EigenPack
|
|
{
|
|
typedef T VectorType;
|
|
std::vector<RealD> eval;
|
|
std::vector<T> evec;
|
|
|
|
EigenPack(void) = default;
|
|
|
|
EigenPack(const size_t size, GridBase *grid)
|
|
{
|
|
resize(size, grid);
|
|
}
|
|
|
|
void resize(const size_t size, GridBase *grid)
|
|
{
|
|
eval.resize(size);
|
|
evec.resize(size, grid);
|
|
}
|
|
|
|
void read(const std::string fileStem)
|
|
{
|
|
std::string evecFilename = fileStem + "_evec.bin";
|
|
std::string evalFilename = fileStem + "_eval.xml";
|
|
emptyUserRecord record;
|
|
ScidacReader binReader;
|
|
XmlReader xmlReader(evalFilename);
|
|
|
|
LOG(Message) << "Reading " << evec.size() << " eigenvectors from '"
|
|
<< evecFilename << "'" << std::endl;
|
|
binReader.open(evecFilename);
|
|
for(int k = 0; k < evec.size(); ++k)
|
|
{
|
|
binReader.readScidacFieldRecord(evec[k], record);
|
|
}
|
|
binReader.close();
|
|
LOG(Message) << "Reading " << eval.size() << " eigenvalues from '"
|
|
<< evalFilename << "'" << std::endl;
|
|
Grid::read(xmlReader, "evals", eval);
|
|
}
|
|
|
|
void write(const std::string fileStem)
|
|
{
|
|
std::string evecFilename = fileStem + "_evec.bin";
|
|
std::string evalFilename = fileStem + "_eval.xml";
|
|
emptyUserRecord record;
|
|
ScidacWriter binWriter;
|
|
XmlWriter xmlWriter(evalFilename);
|
|
|
|
LOG(Message) << "Writing " << evec.size() << " eigenvectors to '"
|
|
<< evecFilename << "'" << std::endl;
|
|
binWriter.open(fileStem + "_evec.bin");
|
|
for(int k = 0; k < evec.size(); ++k)
|
|
{
|
|
binWriter.writeScidacFieldRecord(evec[k], record);
|
|
}
|
|
binWriter.close();
|
|
LOG(Message) << "Writing " << eval.size() << " eigenvalues to '"
|
|
<< evalFilename << "'" << std::endl;
|
|
Grid::write(xmlWriter, "evals", eval);
|
|
}
|
|
};
|
|
|
|
template <typename FImpl>
|
|
using FineEigenPack = EigenPack<typename FImpl::FermionField>;
|
|
|
|
template <typename FImpl, int nBasis>
|
|
using CoarseEigenPack = EigenPack<
|
|
typename LocalCoherenceLanczos<typename FImpl::SiteSpinor,
|
|
typename FImpl::SiteComplex,
|
|
nBasis>::CoarseField>;
|
|
|
|
END_HADRONS_NAMESPACE
|
|
|
|
#endif // Hadrons_LanczosUtils_hpp_
|