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//------------------------------------------------------------------------------
// GB_mex_plusplus: C<M> = accum(C,A*B) with user-defined plus_plus_fp32
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_mex.h"
#define USAGE "C = GB_mex_plusplus (C, M, accum, [ ], A, B, desc)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&A) ; \
GrB_Matrix_free_(&B) ; \
GrB_Matrix_free_(&C) ; \
GrB_Matrix_free_(&M) ; \
GrB_BinaryOp_free_(&MyPlus) ; \
GrB_Monoid_free_(&MyAdd) ; \
GrB_Semiring_free_(&MyPlusPlus) ; \
GrB_Descriptor_free_(&desc) ; \
GB_mx_put_global (true) ; \
}
void myplus (float *z, const float *x, const float *y) ;
void myplus (float *z, const float *x, const float *y) { (*z) = (*x)+(*y) ; }
#define MYPLUS_DEFN \
"void myplus (float *z, const float *x, const float *y) { (*z) = (*x)+(*y) ; }"
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
bool malloc_debug = GB_mx_get_global (true) ;
GrB_Matrix A = NULL ;
GrB_Matrix B = NULL ;
GrB_Matrix C = NULL ;
GrB_Matrix M = NULL ;
GrB_Semiring MyPlusPlus = NULL ;
GrB_Descriptor desc = NULL ;
GrB_BinaryOp MyPlus = NULL ;
GrB_Monoid MyAdd = NULL ;
// check inputs
if (nargout > 1 || nargin < 6 || nargin > 7)
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
// get C (make a deep copy)
#define GET_DEEP_COPY \
C = GB_mx_mxArray_to_Matrix (pargin [0], "C input", true, true) ;
#define FREE_DEEP_COPY GrB_Matrix_free_(&C) ;
GET_DEEP_COPY ;
if (C == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("C failed") ;
}
// get M (shallow copy)
M = GB_mx_mxArray_to_Matrix (pargin [1], "M", false, false) ;
if (M == NULL && !mxIsEmpty (pargin [1]))
{
FREE_ALL ;
mexErrMsgTxt ("M failed") ;
}
// get A (shallow copy)
A = GB_mx_mxArray_to_Matrix (pargin [4], "A input", false, true) ;
if (A == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("A failed") ;
}
// get B (shallow copy)
B = GB_mx_mxArray_to_Matrix (pargin [5], "B input", false, true) ;
if (B == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("B failed") ;
}
// create the semiring
GxB_BinaryOp_new (&MyPlus, (GxB_binary_function) myplus,
GrB_FP32, GrB_FP32, GrB_FP32, "myplus", MYPLUS_DEFN) ;
float zero = 0 ;
GrB_Monoid_new (&MyAdd, MyPlus, zero) ;
GrB_Semiring_new (&MyPlusPlus, MyAdd, MyPlus) ;
// get accum, if present
GrB_BinaryOp accum ;
if (!GB_mx_mxArray_to_BinaryOp (&accum, pargin [2], "accum",
C->type, false))
{
FREE_ALL ;
mexErrMsgTxt ("accum failed") ;
}
// get desc
if (!GB_mx_mxArray_to_Descriptor (&desc, PARGIN (6), "desc"))
{
FREE_ALL ;
mexErrMsgTxt ("desc failed") ;
}
// C<M> = accum(C,A*B)
METHOD (GrB_mxm (C, M, accum, MyPlusPlus, A, B, desc)) ;
// return C as a struct and free the GraphBLAS C
pargout [0] = GB_mx_Matrix_to_mxArray (&C, "C output from GrB_mxm", true) ;
FREE_ALL ;
}
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