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Guido Cossu
2017-01-26 15:24:49 +00:00
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lib/qcd/action/gauge/GaugeImplementations.h Normal file
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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./lib/qcd/action/gauge/GaugeImpl.h
Copyright (C) 2015
Author: paboyle <paboyle@ph.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 GRID_QCD_GAUGE_IMPLEMENTATIONS_H
#define GRID_QCD_GAUGE_IMPLEMENTATIONS_H
#include "GaugeImplTypes.h"
namespace Grid {
namespace QCD {
// Composition with smeared link, bc's etc.. probably need multiple inheritance
// Variable precision "S" and variable Nc
template <class GimplTypes> class PeriodicGaugeImpl : public GimplTypes {
public:
INHERIT_GIMPL_TYPES(GimplTypes);
////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Support needed for the assembly of loops including all boundary condition
// effects such as conjugate bcs
////////////////////////////////////////////////////////////////////////////////////////////////////////////
template <class covariant>
static inline Lattice<covariant>
CovShiftForward(const GaugeLinkField &Link, int mu,
const Lattice<covariant> &field) {
return PeriodicBC::CovShiftForward(Link, mu, field);
}
template <class covariant>
static inline Lattice<covariant>
CovShiftBackward(const GaugeLinkField &Link, int mu,
const Lattice<covariant> &field) {
return PeriodicBC::CovShiftBackward(Link, mu, field);
}
static inline GaugeLinkField
CovShiftIdentityBackward(const GaugeLinkField &Link, int mu) {
return Cshift(adj(Link), mu, -1);
}
static inline GaugeLinkField
CovShiftIdentityForward(const GaugeLinkField &Link, int mu) {
return Link;
}
static inline GaugeLinkField ShiftStaple(const GaugeLinkField &Link, int mu) {
return Cshift(Link, mu, 1);
}
static inline bool isPeriodicGaugeField(void) { return true; }
};
// Composition with smeared link, bc's etc.. probably need multiple inheritance
// Variable precision "S" and variable Nc
template <class GimplTypes> class ConjugateGaugeImpl : public GimplTypes {
public:
INHERIT_GIMPL_TYPES(GimplTypes);
////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Support needed for the assembly of loops including all boundary condition
// effects such as Gparity.
////////////////////////////////////////////////////////////////////////////////////////////////////////////
template <class covariant>
static Lattice<covariant> CovShiftForward(const GaugeLinkField &Link, int mu,
const Lattice<covariant> &field) {
return ConjugateBC::CovShiftForward(Link, mu, field);
}
template <class covariant>
static Lattice<covariant> CovShiftBackward(const GaugeLinkField &Link, int mu,
const Lattice<covariant> &field) {
return ConjugateBC::CovShiftBackward(Link, mu, field);
}
static inline GaugeLinkField
CovShiftIdentityBackward(const GaugeLinkField &Link, int mu) {
GridBase *grid = Link._grid;
int Lmu = grid->GlobalDimensions()[mu] - 1;
Lattice<iScalar<vInteger>> coor(grid);
LatticeCoordinate(coor, mu);
GaugeLinkField tmp(grid);
tmp = adj(Link);
tmp = where(coor == Lmu, conjugate(tmp), tmp);
return Cshift(tmp, mu, -1); // moves towards positive mu
}
static inline GaugeLinkField
CovShiftIdentityForward(const GaugeLinkField &Link, int mu) {
return Link;
}
static inline GaugeLinkField ShiftStaple(const GaugeLinkField &Link, int mu) {
GridBase *grid = Link._grid;
int Lmu = grid->GlobalDimensions()[mu] - 1;
Lattice<iScalar<vInteger>> coor(grid);
LatticeCoordinate(coor, mu);
GaugeLinkField tmp(grid);
tmp = Cshift(Link, mu, 1);
tmp = where(coor == Lmu, conjugate(tmp), tmp);
return tmp;
}
static inline bool isPeriodicGaugeField(void) { return false; }
};
typedef PeriodicGaugeImpl<GimplTypesR> PeriodicGimplR; // Real.. whichever prec
typedef PeriodicGaugeImpl<GimplTypesF> PeriodicGimplF; // Float
typedef PeriodicGaugeImpl<GimplTypesD> PeriodicGimplD; // Double
typedef PeriodicGaugeImpl<GimplAdjointTypesR> PeriodicGimplAdjR; // Real.. whichever prec
typedef PeriodicGaugeImpl<GimplAdjointTypesF> PeriodicGimplAdjF; // Float
typedef PeriodicGaugeImpl<GimplAdjointTypesD> PeriodicGimplAdjD; // Double
typedef ConjugateGaugeImpl<GimplTypesR> ConjugateGimplR; // Real.. whichever prec
typedef ConjugateGaugeImpl<GimplTypesF> ConjugateGimplF; // Float
typedef ConjugateGaugeImpl<GimplTypesD> ConjugateGimplD; // Double
}
}
#endif