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//------------------------------------------------------------------------------
// GrB_mxm: matrix-matrix multiply
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// C<M> = accum (C,A*B) and variations.
// The input matrices A and B are optionally transposed, as determined by the
// Descriptor desc.
#include "mxm/GB_mxm.h"
#include "mask/GB_get_mask.h"
GrB_Info GrB_mxm // C<M> = accum (C, A*B)
(
GrB_Matrix C, // input/output matrix for results
const GrB_Matrix M_in, // optional mask for C, unused if NULL
const GrB_BinaryOp accum, // optional accum for Z=accum(C,T)
const GrB_Semiring semiring, // defines '+' and '*' for T=A*B
const GrB_Matrix A, // first input: matrix A
const GrB_Matrix B, // second input: matrix B
const GrB_Descriptor desc // descriptor for C, M, A, and B,
// and method used for C=A*B
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_RETURN_IF_NULL (C) ;
GB_RETURN_IF_NULL (A) ;
GB_RETURN_IF_NULL (B) ;
GB_RETURN_IF_OUTPUT_IS_READONLY (C) ;
GB_WHERE4 (C, M_in, A, B, "GrB_mxm (C, M, accum, semiring, A, B, desc)") ;
GB_BURBLE_START ("GrB_mxm") ;
// get the descriptor
GB_GET_DESCRIPTOR (info, desc, C_replace, Mask_comp, Mask_struct,
A_transpose, B_transpose, AxB_method, do_sort) ;
// get the mask
GrB_Matrix M = GB_get_mask (M_in, &Mask_comp, &Mask_struct) ;
//--------------------------------------------------------------------------
// C<M> = accum (C,A*B) and variations, using the mxm kernel
//--------------------------------------------------------------------------
// C<M> = accum (C,T) where T = A*B, A'*B, A*B', or A'*B'
info = GB_mxm (
C, C_replace, // C matrix and its descriptor
M, Mask_comp, Mask_struct, // mask matrix and its descriptor
accum, // for accum (C,T)
semiring, // semiring that defines T=A*B
A, A_transpose, // A matrix and its descriptor
B, B_transpose, // B matrix and its descriptor
false, // use fmult(x,y), flipxy = false
AxB_method, do_sort, // algorithm selector
Werk) ;
GB_BURBLE_END ;
return (info) ;
}
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