.rst .pdf

Contents

oneapi::mkl::sparse::set_matmat_data

Sets the appropriate 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::set_matmat_data routine allows user to set the desired 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);

// example descriptor for general
// C = A * B
sparse::matrix_view_descr viewA = sparse::matrix_view_descr::general;
sparse::matrix_view_descr viewB = sparse::matrix_view_descr::general;
sparse::matrix_view_descr viewC = sparse::matrix_view_descr::general;
transpose opA = transpose::nontrans;
transpose opB = transpose::nontrans;

sparse::set_matmat_data(descr, viewA, opA, viewB, opB, viewC);

// use descr in sparse::matmat() api

sparse::release_matmat_descr(descr);

API

Syntax

namespace oneapi::mkl::sparse {
    void set_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

viewA, viewB, viewC

sparse::matrix_view_descr enum values describing how the , and matrix representations 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.

Output Parameters

descr

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

oneapi::mkl::sparse::init_matmat_descr oneapi::mkl::sparse::get_matmat_data