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Grid/lib/qcd/hmc/HMC_GridModules.h
2018-02-24 22:22:02 +00:00

176 lines
4.8 KiB
C++

/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./lib/qcd/hmc/HMC_GridModules.h
Copyright (C) 2015
Copyright (C) 2016
Author: Guido Cossu <guido.cossu@ed.ac.uk>
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 HMC_GRID_MODULES
#define HMC_GRID_MODULES
NAMESPACE_BEGIN(Grid);
// Resources
// Modules for grids
// Introduce another namespace HMCModules?
class GridModuleParameters: Serializable{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(GridModuleParameters,
std::string, lattice,
std::string, mpi);
std::vector<int> getLattice() const {return strToVec<int>(lattice);}
std::vector<int> getMpi() const {return strToVec<int>(mpi);}
void check() const {
if (getLattice().size() != getMpi().size() ) {
std::cout << GridLogError
<< "Error in GridModuleParameters: lattice and mpi dimensions "
"do not match"
<< std::endl;
exit(1);
}
}
template <class ReaderClass>
GridModuleParameters(Reader<ReaderClass>& Reader, std::string n = "LatticeGrid"):name(n) {
read(Reader, name, *this);
check();
}
// Save on file
template< class WriterClass>
void save(Writer<WriterClass>& Writer){
check();
write(Writer, name, *this);
}
private:
std::string name;
};
// Lower level class
class GridModule {
public:
GridCartesian* get_full() {
std::cout << GridLogDebug << "Getting cartesian in module"<< std::endl;
return grid_.get(); }
GridRedBlackCartesian* get_rb() {
std::cout << GridLogDebug << "Getting rb-cartesian in module"<< std::endl;
return rbgrid_.get(); }
void set_full(GridCartesian* grid) { grid_.reset(grid); }
void set_rb(GridRedBlackCartesian* rbgrid) { rbgrid_.reset(rbgrid); }
void show_full_decomposition(){ grid_->show_decomposition(); }
void show_rb_decomposition(){ rbgrid_->show_decomposition(); }
protected:
std::unique_ptr<GridCartesian> grid_;
std::unique_ptr<GridRedBlackCartesian> rbgrid_;
};
////////////////////////////////////
// Classes for the user
////////////////////////////////////
// Note: the space time grid should be out of the QCD namespace
template <class vector_type>
class GridFourDimModule : public GridModule
{
public:
GridFourDimModule()
{
set_full(SpaceTimeGrid::makeFourDimGrid(
GridDefaultLatt(),
GridDefaultSimd(4, vector_type::Nsimd()),
GridDefaultMpi()));
set_rb(SpaceTimeGrid::makeFourDimRedBlackGrid(grid_.get()));
}
GridFourDimModule(const std::vector<int> tweak_simd)
{
Coordinate _tweak_simd(tweak_simd);
if (tweak_simd.size() != 4)
{
std::cout << GridLogError
<< "Error in GridFourDimModule: SIMD size different from 4"
<< std::endl;
exit(1);
}
// Checks that the product agrees with the expectation
int simd_sum = 1;
for (auto &n : tweak_simd)
simd_sum *= n;
std::cout << GridLogDebug << "TweakSIMD: " << tweak_simd << " Sum: " << simd_sum << std::endl;
if (simd_sum == vector_type::Nsimd())
{
set_full(SpaceTimeGrid::makeFourDimGrid(
GridDefaultLatt(),
_tweak_simd,
GridDefaultMpi()));
set_rb(SpaceTimeGrid::makeFourDimRedBlackGrid(grid_.get()));
}
else
{
std::cout << GridLogError
<< "Error in GridFourDimModule: SIMD lanes must sum to "
<< vector_type::Nsimd()
<< std::endl;
}
}
GridFourDimModule(const GridModuleParameters Params)
{
std::vector<int> lattice_v = Params.getLattice();
std::vector<int> mpi_v = Params.getMpi();
if (lattice_v.size() == 4)
{
set_full(SpaceTimeGrid::makeFourDimGrid(
lattice_v,
GridDefaultSimd(4, vector_type::Nsimd()),
mpi_v));
set_rb(SpaceTimeGrid::makeFourDimRedBlackGrid(grid_.get()));
}
else
{
std::cout << GridLogError
<< "Error in GridFourDimModule: lattice dimension different from 4"
<< std::endl;
exit(1);
}
}
};
typedef GridFourDimModule<vComplex> GridDefaultFourDimModule;
NAMESPACE_END(Grid);
#endif // HMC_GRID_MODULES