coo.hpp

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#ifndef GKO_CORE_MATRIX_COO_HPP_
#define GKO_CORE_MATRIX_COO_HPP_


#include <ginkgo/core/base/array.hpp>
#include <ginkgo/core/base/lin_op.hpp>


namespace gko {
namespace matrix {


template <typename ValueType, typename IndexType>
class Csr;


template <typename ValueType>
class Dense;


template <typename ValueType = default_precision, typename IndexType = int32>
class Coo : public EnableLinOp<Coo<ValueType, IndexType>>,
            public EnableCreateMethod<Coo<ValueType, IndexType>>,
            public ConvertibleTo<Csr<ValueType, IndexType>>,
            public ConvertibleTo<Dense<ValueType>>,
            public ReadableFromMatrixData<ValueType, IndexType>,
            public WritableToMatrixData<ValueType, IndexType> {
    friend class EnableCreateMethod<Coo>;
    friend class EnablePolymorphicObject<Coo, LinOp>;
    friend class Csr<ValueType, IndexType>;
    friend class Dense<ValueType>;

public:
    using EnableLinOp<Coo>::convert_to;
    using EnableLinOp<Coo>::move_to;

    using value_type = ValueType;
    using index_type = IndexType;
    using mat_data = matrix_data<ValueType, IndexType>;

    void convert_to(Csr<ValueType, IndexType> *other) const override;

    void move_to(Csr<ValueType, IndexType> *other) override;

    void convert_to(Dense<ValueType> *other) const override;

    void move_to(Dense<ValueType> *other) override;

    void read(const mat_data &data) override;

    void write(mat_data &data) const override;

    value_type *get_values() noexcept { return values_.get_data(); }

    const value_type *get_const_values() const noexcept
    {
        return values_.get_const_data();
    }

    index_type *get_col_idxs() noexcept { return col_idxs_.get_data(); }

    const index_type *get_const_col_idxs() const noexcept
    {
        return col_idxs_.get_const_data();
    }

    index_type *get_row_idxs() noexcept { return row_idxs_.get_data(); }

    const index_type *get_const_row_idxs() const noexcept
    {
        return row_idxs_.get_const_data();
    }

    size_type get_num_stored_elements() const noexcept
    {
        return values_.get_num_elems();
    }

    LinOp *apply2(const LinOp *b, LinOp *x)
    {
        this->validate_application_parameters(b, x);
        auto exec = this->get_executor();
        this->apply2_impl(make_temporary_clone(exec, b).get(),
                          make_temporary_clone(exec, x).get());
        return this;
    }

    const LinOp *apply2(const LinOp *b, LinOp *x) const
    {
        this->validate_application_parameters(b, x);
        auto exec = this->get_executor();
        this->apply2_impl(make_temporary_clone(exec, b).get(),
                          make_temporary_clone(exec, x).get());
        return this;
    }

    LinOp *apply2(const LinOp *alpha, const LinOp *b, LinOp *x)
    {
        this->validate_application_parameters(b, x);
        GKO_ASSERT_EQUAL_DIMENSIONS(alpha, dim<2>(1, 1));
        auto exec = this->get_executor();
        this->apply2_impl(make_temporary_clone(exec, alpha).get(),
                          make_temporary_clone(exec, b).get(),
                          make_temporary_clone(exec, x).get());
        return this;
    }

    const LinOp *apply2(const LinOp *alpha, const LinOp *b, LinOp *x) const
    {
        this->validate_application_parameters(b, x);
        GKO_ASSERT_EQUAL_DIMENSIONS(alpha, dim<2>(1, 1));
        auto exec = this->get_executor();
        this->apply2_impl(make_temporary_clone(exec, alpha).get(),
                          make_temporary_clone(exec, b).get(),
                          make_temporary_clone(exec, x).get());
        return this;
    }

protected:
    Coo(std::shared_ptr<const Executor> exec, const dim<2> &size = dim<2>{},
        size_type num_nonzeros = {})
        : EnableLinOp<Coo>(exec, size),
          values_(exec, num_nonzeros),
          col_idxs_(exec, num_nonzeros),
          row_idxs_(exec, num_nonzeros)
    {}

    template <typename ValuesArray, typename ColIdxsArray,
              typename RowIdxsArray>
    Coo(std::shared_ptr<const Executor> exec, const dim<2> &size,
        ValuesArray &&values, ColIdxsArray &&col_idxs, RowIdxsArray &&row_idxs)
        : EnableLinOp<Coo>(exec, size),
          values_{exec, std::forward<ValuesArray>(values)},
          col_idxs_{exec, std::forward<ColIdxsArray>(col_idxs)},
          row_idxs_{exec, std::forward<RowIdxsArray>(row_idxs)}
    {
        GKO_ENSURE_IN_BOUNDS(values_.get_num_elems() - 1,
                             col_idxs_.get_num_elems());
        GKO_ENSURE_IN_BOUNDS(values_.get_num_elems() - 1,
                             row_idxs_.get_num_elems());
    }

    void apply_impl(const LinOp *b, LinOp *x) const override;

    void apply_impl(const LinOp *alpha, const LinOp *b, const LinOp *beta,
                    LinOp *x) const override;

    void apply2_impl(const LinOp *b, LinOp *x) const;

    void apply2_impl(const LinOp *alpha, const LinOp *b, LinOp *x) const;

private:
    Array<value_type> values_;
    Array<index_type> col_idxs_;
    Array<index_type> row_idxs_;
};


}  // namespace matrix
}  // namespace gko


#endif  // GKO_CORE_MATRIX_COO_HPP_