mirror of
https://github.com/paboyle/Grid.git
synced 2025-04-05 03:35:55 +01:00
139 lines
4.7 KiB
C++
139 lines
4.7 KiB
C++
/*************************************************************************************
|
|
|
|
Grid physics library, www.github.com/paboyle/Grid
|
|
|
|
Source file: ./lib/algorithms/iterative/NormalEquations.h
|
|
|
|
Copyright (C) 2015
|
|
|
|
Author: Peter Boyle <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_NORMAL_EQUATIONS_H
|
|
#define GRID_NORMAL_EQUATIONS_H
|
|
|
|
NAMESPACE_BEGIN(Grid);
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Take a matrix and form an NE solver calling a Herm solver
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
template<class Field> class NormalEquations : public LinearFunction<Field>{
|
|
private:
|
|
SparseMatrixBase<Field> & _Matrix;
|
|
OperatorFunction<Field> & _HermitianSolver;
|
|
LinearFunction<Field> & _Guess;
|
|
public:
|
|
|
|
/////////////////////////////////////////////////////
|
|
// Wrap the usual normal equations trick
|
|
/////////////////////////////////////////////////////
|
|
NormalEquations(SparseMatrixBase<Field> &Matrix, OperatorFunction<Field> &HermitianSolver,
|
|
LinearFunction<Field> &Guess)
|
|
: _Matrix(Matrix), _HermitianSolver(HermitianSolver), _Guess(Guess) {};
|
|
|
|
void operator() (const Field &in, Field &out){
|
|
|
|
Field src(in.Grid());
|
|
Field tmp(in.Grid());
|
|
|
|
MdagMLinearOperator<SparseMatrixBase<Field>,Field> MdagMOp(_Matrix);
|
|
_Matrix.Mdag(in,src);
|
|
_Guess(src,out);
|
|
_HermitianSolver(MdagMOp,src,out); // Mdag M out = Mdag in
|
|
|
|
}
|
|
};
|
|
|
|
template<class Field> class NormalResidual : public LinearFunction<Field>{
|
|
private:
|
|
SparseMatrixBase<Field> & _Matrix;
|
|
OperatorFunction<Field> & _HermitianSolver;
|
|
LinearFunction<Field> & _Guess;
|
|
public:
|
|
|
|
/////////////////////////////////////////////////////
|
|
// Wrap the usual normal equations trick
|
|
/////////////////////////////////////////////////////
|
|
NormalResidual(SparseMatrixBase<Field> &Matrix, OperatorFunction<Field> &HermitianSolver,
|
|
LinearFunction<Field> &Guess)
|
|
: _Matrix(Matrix), _HermitianSolver(HermitianSolver), _Guess(Guess) {};
|
|
|
|
void operator() (const Field &in, Field &out){
|
|
|
|
Field res(in.Grid());
|
|
Field tmp(in.Grid());
|
|
|
|
MMdagLinearOperator<SparseMatrixBase<Field>,Field> MMdagOp(_Matrix);
|
|
_Guess(in,res);
|
|
_HermitianSolver(MMdagOp,in,res); // M Mdag res = in ;
|
|
_Matrix.Mdag(res,out); // out = Mdag res
|
|
}
|
|
};
|
|
|
|
template<class Field> class HPDSolver : public LinearFunction<Field> {
|
|
private:
|
|
LinearOperatorBase<Field> & _Matrix;
|
|
OperatorFunction<Field> & _HermitianSolver;
|
|
LinearFunction<Field> & _Guess;
|
|
public:
|
|
|
|
/////////////////////////////////////////////////////
|
|
// Wrap the usual normal equations trick
|
|
/////////////////////////////////////////////////////
|
|
HPDSolver(LinearOperatorBase<Field> &Matrix,
|
|
OperatorFunction<Field> &HermitianSolver,
|
|
LinearFunction<Field> &Guess)
|
|
: _Matrix(Matrix), _HermitianSolver(HermitianSolver), _Guess(Guess) {};
|
|
|
|
void operator() (const Field &in, Field &out){
|
|
|
|
_Guess(in,out);
|
|
_HermitianSolver(_Matrix,in,out); //M out = in
|
|
|
|
}
|
|
};
|
|
|
|
|
|
template<class Field> class MdagMSolver : public LinearFunction<Field> {
|
|
private:
|
|
SparseMatrixBase<Field> & _Matrix;
|
|
OperatorFunction<Field> & _HermitianSolver;
|
|
LinearFunction<Field> & _Guess;
|
|
public:
|
|
|
|
/////////////////////////////////////////////////////
|
|
// Wrap the usual normal equations trick
|
|
/////////////////////////////////////////////////////
|
|
MdagMSolver(SparseMatrixBase<Field> &Matrix, OperatorFunction<Field> &HermitianSolver,
|
|
LinearFunction<Field> &Guess)
|
|
: _Matrix(Matrix), _HermitianSolver(HermitianSolver), _Guess(Guess) {};
|
|
|
|
void operator() (const Field &in, Field &out){
|
|
|
|
MdagMLinearOperator<SparseMatrixBase<Field>,Field> MdagMOp(_Matrix);
|
|
_Guess(in,out);
|
|
|
|
_HermitianSolver(MdagMOp,in,out); // Mdag M out = Mdag in
|
|
|
|
}
|
|
};
|
|
|
|
NAMESPACE_END(Grid);
|
|
#endif
|