// SPDX-FileCopyrightText: 2017 - 2024 The Ginkgo authors
//
// SPDX-License-Identifier: BSD-3-Clause

#ifndef GKO_CORE_SOLVER_CG_KERNELS_HPP_
#define GKO_CORE_SOLVER_CG_KERNELS_HPP_


#include <memory>

#include <ginkgo/core/base/array.hpp>
#include <ginkgo/core/base/math.hpp>
#include <ginkgo/core/base/types.hpp>
#include <ginkgo/core/matrix/dense.hpp>
#include <ginkgo/core/stop/stopping_status.hpp>

#include "core/base/kernel_declaration.hpp"


namespace gko {
namespace kernels {
namespace cg {


#define GKO_DECLARE_CG_INITIALIZE_KERNEL(_type)                              \
    void initialize(std::shared_ptr<const DefaultExecutor> exec,             \
                    const matrix::Dense<_type>* b, matrix::Dense<_type>* r,  \
                    matrix::Dense<_type>* z, matrix::Dense<_type>* p,        \
                    matrix::Dense<_type>* q, matrix::Dense<_type>* prev_rho, \
                    matrix::Dense<_type>* rho,                               \
                    array<stopping_status>* stop_status)


#define GKO_DECLARE_CG_STEP_1_KERNEL(_type)                             \
    void step_1(std::shared_ptr<const DefaultExecutor> exec,            \
                matrix::Dense<_type>* p, const matrix::Dense<_type>* z, \
                const matrix::Dense<_type>* rho,                        \
                const matrix::Dense<_type>* prev_rho,                   \
                const array<stopping_status>* stop_status)


#define GKO_DECLARE_CG_STEP_2_KERNEL(_type)                                   \
    void step_2(std::shared_ptr<const DefaultExecutor> exec,                  \
                matrix::Dense<_type>* x, matrix::Dense<_type>* r,             \
                const matrix::Dense<_type>* p, const matrix::Dense<_type>* q, \
                const matrix::Dense<_type>* beta,                             \
                const matrix::Dense<_type>* rho,                              \
                const array<stopping_status>* stop_status)


#define GKO_DECLARE_ALL_AS_TEMPLATES             \
    template <typename ValueType>                \
    GKO_DECLARE_CG_INITIALIZE_KERNEL(ValueType); \
    template <typename ValueType>                \
    GKO_DECLARE_CG_STEP_1_KERNEL(ValueType);     \
    template <typename ValueType>                \
    GKO_DECLARE_CG_STEP_2_KERNEL(ValueType)


}  // namespace cg


GKO_DECLARE_FOR_ALL_EXECUTOR_NAMESPACES(cg, GKO_DECLARE_ALL_AS_TEMPLATES);


#undef GKO_DECLARE_ALL_AS_TEMPLATES


}  // namespace kernels
}  // namespace gko


#endif  // GKO_CORE_SOLVER_CG_KERNELS_HPP_
