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//------------------------------------------------------------------------------
// GxB_Matrix_subassign: C(Rows,Cols)<M> = accum (C(Rows,Cols),A) or A'
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// Compare with GrB_Matrix_assign, which uses M and C_replace differently
#include "GB_subassign.h"
#include "GB_get_mask.h"
GrB_Info GxB_Matrix_subassign // C(Rows,Cols)<M> += A or A'
(
GrB_Matrix C, // input/output matrix for results
const GrB_Matrix M_in, // mask for C(Rows,Cols), unused if NULL
const GrB_BinaryOp accum, // accum for Z=accum(C(Rows,Cols),T)
const GrB_Matrix A, // first input: matrix A
const GrB_Index *Rows, // row indices
GrB_Index nRows, // number of row indices
const GrB_Index *Cols, // column indices
GrB_Index nCols, // number of column indices
const GrB_Descriptor desc // descriptor for C(Rows,Cols), M, and A
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_WHERE (C, "GxB_Matrix_subassign"
" (C, M, accum, A, Rows, nRows, Cols, nCols, desc)") ;
GB_BURBLE_START ("GxB_subassign") ;
GB_RETURN_IF_NULL_OR_FAULTY (C) ;
GB_RETURN_IF_FAULTY (M_in) ;
GB_RETURN_IF_NULL_OR_FAULTY (A) ;
// get the descriptor
GB_GET_DESCRIPTOR (info, desc, C_replace, Mask_comp, Mask_struct,
A_transpose, xx1, xx2, xx7) ;
// get the mask
GrB_Matrix M = GB_get_mask (M_in, &Mask_comp, &Mask_struct) ;
//--------------------------------------------------------------------------
// C(Rows,Cols)<M> = accum (C(Rows,Cols), A) and variations
//--------------------------------------------------------------------------
info = GB_subassign (
C, C_replace, // C matrix and its descriptor
M, Mask_comp, Mask_struct, // mask matrix and its descriptor
false, // do not transpose the mask
accum, // for accum (C(Rows,Cols),A)
A, A_transpose, // A and its descriptor (T=A or A')
Rows, nRows, // row indices
Cols, nCols, // column indices
false, NULL, GB_ignore_code, // no scalar expansion
Context) ;
GB_BURBLE_END ;
return (info) ;
}
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