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deprecated_solver_cg_eigen.hh
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/**
* @file deprecated_solver_cg_eigen.hh
*
* @author Till Junge <till.junge@epfl.ch>
*
* @date 19 Jan 2018
*
* @brief binding to Eigen's conjugate gradient solver
*
* Copyright © 2018 Till Junge
*
* µSpectre 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, or (at
* your option) any later version.
*
* µSpectre 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 GNU Emacs; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef DEPRECATED_SOLVER_EIGEN_H
#define DEPRECATED_SOLVER_EIGEN_H
#include "solver/deprecated_solver_base.hh"
#include <Eigen/IterativeLinearSolvers>
#include <unsupported/Eigen/IterativeSolvers>
#include <type_traits>
namespace muSpectre {
template <class DeprecatedSolverType, Dim_t DimS, Dim_t DimM>
class DeprecatedSolverEigen;
template <Dim_t DimS, Dim_t DimM=DimS>
class DeprecatedSolverCGEigen;
template <Dim_t DimS, Dim_t DimM=DimS>
class DeprecatedSolverGMRESEigen;
template <Dim_t DimS, Dim_t DimM=DimS>
class DeprecatedSolverBiCGSTABEigen;
template <Dim_t DimS, Dim_t DimM=DimS>
class DeprecatedSolverDGMRESEigen;
template <Dim_t DimS, Dim_t DimM=DimS>
class DeprecatedSolverMINRESEigen;
namespace internal {
template <class DeprecatedSolver>
struct DeprecatedSolver_traits {
};
//! traits for the Eigen conjugate gradient solver
template <Dim_t DimS, Dim_t DimM>
struct DeprecatedSolver_traits<DeprecatedSolverCGEigen<DimS, DimM>> {
//! Eigen Iterative DeprecatedSolver
using DeprecatedSolver =
Eigen::ConjugateGradient<typename DeprecatedSolverEigen<DeprecatedSolverCGEigen<DimS, DimM>,
DimS, DimM>::Adaptor,
Eigen::Lower|Eigen::Upper,
Eigen::IdentityPreconditioner>;
};
//! traits for the Eigen GMRES solver
template <Dim_t DimS, Dim_t DimM>
struct DeprecatedSolver_traits<DeprecatedSolverGMRESEigen<DimS, DimM>> {
//! Eigen Iterative DeprecatedSolver
using DeprecatedSolver =
Eigen::GMRES<typename DeprecatedSolverEigen<DeprecatedSolverGMRESEigen<DimS, DimM>,
DimS, DimM>::Adaptor,
Eigen::IdentityPreconditioner>;
};
//! traits for the Eigen BiCGSTAB solver
template <Dim_t DimS, Dim_t DimM>
struct DeprecatedSolver_traits<DeprecatedSolverBiCGSTABEigen<DimS, DimM>> {
//! Eigen Iterative DeprecatedSolver
using DeprecatedSolver =
Eigen::BiCGSTAB<typename DeprecatedSolverEigen<DeprecatedSolverBiCGSTABEigen<DimS, DimM>,
DimS, DimM>::Adaptor,
Eigen::IdentityPreconditioner>;
};
//! traits for the Eigen DGMRES solver
template <Dim_t DimS, Dim_t DimM>
struct DeprecatedSolver_traits<DeprecatedSolverDGMRESEigen<DimS, DimM>> {
//! Eigen Iterative DeprecatedSolver
using DeprecatedSolver =
Eigen::DGMRES<typename DeprecatedSolverEigen<DeprecatedSolverDGMRESEigen<DimS, DimM>,
DimS, DimM>::Adaptor,
Eigen::IdentityPreconditioner>;
};
//! traits for the Eigen MINRES solver
template <Dim_t DimS, Dim_t DimM>
struct DeprecatedSolver_traits<DeprecatedSolverMINRESEigen<DimS, DimM>> {
//! Eigen Iterative DeprecatedSolver
using DeprecatedSolver =
Eigen::MINRES<typename DeprecatedSolverEigen<DeprecatedSolverMINRESEigen<DimS, DimM>,
DimS, DimM>::Adaptor,
Eigen::Lower|Eigen::Upper,
Eigen::IdentityPreconditioner>;
};
} // internal
/**
* base class for iterative solvers from Eigen
*/
template <class DeprecatedSolverType, Dim_t DimS, Dim_t DimM=DimS>
class DeprecatedSolverEigen: public DeprecatedSolverBase<DimS, DimM>
{
public:
using Parent = DeprecatedSolverBase<DimS, DimM>; //!< base class
//! Input vector for solvers
using SolvVectorIn = typename Parent::SolvVectorIn;
//! Input vector for solvers
using SolvVectorInC = typename Parent::SolvVectorInC;
//! Output vector for solvers
using SolvVectorOut = typename Parent::SolvVectorOut;
using Cell_t = typename Parent::Cell_t; //!< cell type
using Ccoord = typename Parent::Ccoord; //!< cell coordinates type
//! kind of tangent that is required
using Tg_req_t = typename Parent::TangentRequirement;
//! handle for the cell to fit Eigen's sparse matrix interface
using Adaptor = typename Cell_t::Adaptor;
//! traits obtained from CRTP
using DeprecatedSolver = typename internal::DeprecatedSolver_traits<DeprecatedSolverType>::DeprecatedSolver;
//! All Eigen solvers need directional stiffness
constexpr static Tg_req_t tangent_requirement{Tg_req_t::NeedEffect};
//! Default constructor
DeprecatedSolverEigen() = delete;
//! Constructor with domain resolutions, etc,
DeprecatedSolverEigen(Cell_t& cell, Real tol, Uint maxiter=0, bool verbose =false);
//! Copy constructor
DeprecatedSolverEigen(const DeprecatedSolverEigen &other) = delete;
//! Move constructor
DeprecatedSolverEigen(DeprecatedSolverEigen &&other) = default;
//! Destructor
virtual ~DeprecatedSolverEigen() = default;
//! Copy assignment operator
DeprecatedSolverEigen& operator=(const DeprecatedSolverEigen &other) = delete;
//! Move assignment operator
DeprecatedSolverEigen& operator=(DeprecatedSolverEigen &&other) = default;
//! returns whether the solver has converged
bool has_converged() const override final {return this->solver.info() == Eigen::Success;}
//! Allocate fields used during the solution
void initialise() override final;
//! executes the solver
SolvVectorOut solve(const SolvVectorInC rhs, SolvVectorIn x_0) override final;
protected:
//! returns `muSpectre::Tg_req_t::NeedEffect`
Tg_req_t get_tangent_req() const override final;
Adaptor adaptor; //!< cell handle
DeprecatedSolver solver; //!< Eigen's Iterative solver
};
/**
* Binding to Eigen's conjugate gradient solver
*/
template <Dim_t DimS, Dim_t DimM>
class DeprecatedSolverCGEigen:
public DeprecatedSolverEigen<DeprecatedSolverCGEigen<DimS, DimM>, DimS, DimM> {
public:
using DeprecatedSolverEigen<DeprecatedSolverCGEigen<DimS, DimM>, DimS, DimM>::DeprecatedSolverEigen;
std::string name() const override final {return "CG";}
};
/**
* Binding to Eigen's GMRES solver
*/
template <Dim_t DimS, Dim_t DimM>
class DeprecatedSolverGMRESEigen:
public DeprecatedSolverEigen<DeprecatedSolverGMRESEigen<DimS, DimM>, DimS, DimM> {
public:
using DeprecatedSolverEigen<DeprecatedSolverGMRESEigen<DimS, DimM>, DimS, DimM>::DeprecatedSolverEigen;
std::string name() const override final {return "GMRES";}
};
/**
* Binding to Eigen's BiCGSTAB solver
*/
template <Dim_t DimS, Dim_t DimM>
class DeprecatedSolverBiCGSTABEigen:
public DeprecatedSolverEigen<DeprecatedSolverBiCGSTABEigen<DimS, DimM>, DimS, DimM> {
public:
using DeprecatedSolverEigen<DeprecatedSolverBiCGSTABEigen<DimS, DimM>, DimS, DimM>::DeprecatedSolverEigen;
//! DeprecatedSolver's name
std::string name() const override final {return "BiCGSTAB";}
};
/**
* Binding to Eigen's DGMRES solver
*/
template <Dim_t DimS, Dim_t DimM>
class DeprecatedSolverDGMRESEigen:
public DeprecatedSolverEigen<DeprecatedSolverDGMRESEigen<DimS, DimM>, DimS, DimM> {
public:
using DeprecatedSolverEigen<DeprecatedSolverDGMRESEigen<DimS, DimM>, DimS, DimM>::DeprecatedSolverEigen;
//! DeprecatedSolver's name
std::string name() const override final {return "DGMRES";}
};
/**
* Binding to Eigen's MINRES solver
*/
template <Dim_t DimS, Dim_t DimM>
class DeprecatedSolverMINRESEigen:
public DeprecatedSolverEigen<DeprecatedSolverMINRESEigen<DimS, DimM>, DimS, DimM> {
public:
using DeprecatedSolverEigen<DeprecatedSolverMINRESEigen<DimS, DimM>, DimS, DimM>::DeprecatedSolverEigen;
//! DeprecatedSolver's name
std::string name() const override final {return "MINRES";}
};
} // muSpectre
#endif /* DEPRECATED_SOLVER_EIGEN_H */

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