5#ifndef GKO_PUBLIC_CORE_SOLVER_FCG_HPP_
6#define GKO_PUBLIC_CORE_SOLVER_FCG_HPP_
12#include <ginkgo/core/base/array.hpp>
13#include <ginkgo/core/base/exception_helpers.hpp>
14#include <ginkgo/core/base/lin_op.hpp>
15#include <ginkgo/core/base/math.hpp>
16#include <ginkgo/core/base/types.hpp>
17#include <ginkgo/core/log/logger.hpp>
18#include <ginkgo/core/matrix/dense.hpp>
19#include <ginkgo/core/matrix/identity.hpp>
20#include <ginkgo/core/solver/solver_base.hpp>
21#include <ginkgo/core/stop/combined.hpp>
22#include <ginkgo/core/stop/criterion.hpp>
50template <
typename ValueType = default_precision>
59 using value_type = ValueType;
77 parameters_type, Factory> {};
83 void apply_impl(
const LinOp* b,
LinOp* x)
const override;
85 template <
typename VectorType>
89 LinOp* x)
const override;
91 explicit Fcg(std::shared_ptr<const Executor> exec)
96 std::shared_ptr<const LinOp> system_matrix)
100 std::move(system_matrix), factory->get_parameters()},
101 parameters_{factory->get_parameters()}
106template <
typename ValueType>
110 static int num_vectors(
const Solver&);
112 static int num_arrays(
const Solver&);
114 static std::vector<std::string> op_names(
const Solver&);
116 static std::vector<std::string> array_names(
const Solver&);
118 static std::vector<int> scalars(
const Solver&);
120 static std::vector<int> vectors(
const Solver&);
123 constexpr static int r = 0;
125 constexpr static int z = 1;
127 constexpr static int p = 2;
129 constexpr static int q = 3;
131 constexpr static int t = 4;
133 constexpr static int alpha = 5;
135 constexpr static int beta = 6;
137 constexpr static int prev_rho = 7;
139 constexpr static int rho = 8;
141 constexpr static int rho_t = 9;
143 constexpr static int one = 10;
145 constexpr static int minus_one = 11;
148 constexpr static int stop = 0;
150 constexpr static int tmp = 1;
The EnableLinOp mixin can be used to provide sensible default implementations of the majority of the ...
Definition lin_op.hpp:880
This mixin inherits from (a subclass of) PolymorphicObject and provides a base implementation of a ne...
Definition polymorphic_object.hpp:663
Definition lin_op.hpp:118
std::shared_ptr< const Executor > get_executor() const noexcept
Returns the Executor of the object.
Definition polymorphic_object.hpp:235
Linear operators which support transposition should implement the Transposable interface.
Definition lin_op.hpp:434
A LinOp implementing this interface stores a system matrix and stopping criterion factory.
Definition solver_base.hpp:788
FCG or the flexible conjugate gradient method is an iterative type Krylov subspace method which is su...
Definition fcg.hpp:54
std::unique_ptr< LinOp > transpose() const override
Returns a LinOp representing the transpose of the Transposable object.
std::unique_ptr< LinOp > conj_transpose() const override
Returns a LinOp representing the conjugate transpose of the Transposable object.
bool apply_uses_initial_guess() const override
Return true as iterative solvers use the data in x as an initial guess.
Definition fcg.hpp:71
#define GKO_ENABLE_BUILD_METHOD(_factory_name)
Defines a build method for the factory, simplifying its construction by removing the repetitive typin...
Definition abstract_factory.hpp:394
#define GKO_ENABLE_LIN_OP_FACTORY(_lin_op, _parameters_name, _factory_name)
This macro will generate a default implementation of a LinOpFactory for the LinOp subclass it is defi...
Definition lin_op.hpp:1018
The Ginkgo namespace.
Definition abstract_factory.hpp:20
constexpr T one()
Returns the multiplicative identity for T.
Definition math.hpp:775
Definition solver_base.hpp:841
Traits class providing information on the type and location of workspace vectors inside a solver.
Definition solver_base.hpp:239