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// **************************************************************************
//
// PARALUTION www.paralution.com
//
// Copyright (C) 2015 PARALUTION Labs UG (haftungsbeschränkt) & Co. KG
// Am Hasensprung 6, 76571 Gaggenau
// Handelsregister: Amtsgericht Mannheim, HRA 706051
// Vertreten durch:
// PARALUTION Labs Verwaltungs UG (haftungsbeschränkt)
// Am Hasensprung 6, 76571 Gaggenau
// Handelsregister: Amtsgericht Mannheim, HRB 721277
// Geschäftsführer: Dimitar Lukarski, Nico Trost
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
//
// **************************************************************************
// PARALUTION version 1.1.0
#ifndef PARALUTION_GMRES_GMRES_HPP_
#define PARALUTION_GMRES_GMRES_HPP_
#include "../solver.hpp"
#include <vector>
namespace paralution {
template <class OperatorType, class VectorType, typename ValueType>
class GMRES : public IterativeLinearSolver<OperatorType, VectorType, ValueType> {
public:
GMRES();
virtual ~GMRES();
virtual void Print(void) const;
virtual void Build(void);
virtual void Clear(void);
/// Set the size of the Krylov-space basis
virtual void SetBasisSize(const int size_basis);
protected:
virtual void SolveNonPrecond_(const VectorType &rhs,
VectorType *x);
virtual void SolvePrecond_(const VectorType &rhs,
VectorType *x);
virtual void PrintStart_(void) const;
virtual void PrintEnd_(void) const;
virtual void MoveToHostLocalData_(void);
virtual void MoveToAcceleratorLocalData_(void);
void GenerateGivensRotation_(const ValueType &x, const ValueType &y,
ValueType &c, ValueType &s) const;
void ApplyGivensRotation_(const ValueType &c, const ValueType &s,
ValueType &x, ValueType &y) const;
void BackSubstitute_(std::vector<ValueType> &g,
const std::vector<ValueType> &H,
int k) const;
private:
VectorType z_, w_;
VectorType **v_;
int size_basis_;
};
}
#endif // PARALUTION_GMRES_GMRES_HPP_