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oneapi::mkl::sparse::get_matmat_data

Queries the oneapi::mkl::sparse::matrix_view_descr and oneapi::mkl::transpose values in the oneapi::mkl::sparse::matmat_descr_t object reflecting the sparse::matmat operation to be performed: .

Description

The oneapi::mkl::sparse::get_matmat_data routine allows user to query the enum values set for the sparse matrix - sparse matrix operation in the oneapi::mkl::sparse::matmat_descr_t object which will be used in the sparse::matmat routine.

The oneapi::mkl::sparse::matrix_view_descr enum class is defined in the oneapi/mkl/spblas.hpp header file

namespace oneapi::mkl::sparse {
    enum class matrix_view_descr : std::int32_t {
        general
    };
}

where general view assumes all data is populated in the sparse::matrix_handle_t object for both lower, diagonal and upper portions of the matrix. A common usage model for the matmat descriptor is the following:

using namespace oneapi::mkl;
sparse::matmat_descr_t descr = NULL;
sparse::init_matmat_descr(descr);
// someone sets matmat descr

// query what was in descr
sparse::matrix_view_descr viewA, viewB, viewC;
transpose opA, opB;
sparse::get_matmat_data(descr, viewA, opA, viewV, opB, viewC);

sparse::release_matmat_descr(descr);

API

Syntax

namespace oneapi::mkl::sparse {
    void get_matmat_descr (
        sparse::matmat_descr_t    descr,
        sparse::matrix_view_descr &viewA,
        transpose                 &opA,
        sparse::matrix_view_descr &viewB,
        transpose                 &opB,
        sparse::matrix_view_descr &viewC);
}

Include Files

• oneapi/mkl/spblas.hpp

Input Parameters

descr

sparse::matmat_descr_t object used to define the sparse matrix - sparse matrix operation to be performed by the sparse::matmat routine.

Output Parameters

viewA, viewB, viewC

sparse::matrix_view_descr enum values describing how the , and matrix represenatations should be viewed. Currently, only the general type is supported.

opA, opB

Specifies operation op() on input matrix.

oneapi::mkl::transpose::nontrans	Non-transpose, .
oneapi::mkl::transpose::trans	Transpose, .
oneapi::mkl::transpose::conjtrans	Conjugate transpose, .

Note

Currently, the only supported case for operation is oneapi::mkl::transpose::nontrans.

oneapi::mkl::sparse::set_matmat_data oneapi::mkl::sparse::release_matmat_descr