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//------------------------------------------------------------------------------
// GB_mex_mxm_flops: compute flops to do C=A*B, C<M>=A*B or C<!M>=A*B
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_mex.h"
#define USAGE "[bflops mwork] = GB_mex_mxm_flops (M, Mask_comp, A, B)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&A) ; \
GrB_Matrix_free_(&B) ; \
GrB_Matrix_free_(&M) ; \
GB_mx_put_global (true) ; \
}
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 M = NULL ;
// check inputs
GB_CONTEXT (USAGE) ;
if (nargout > 2 || nargin != 4)
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
// get M (shallow copy)
M = GB_mx_mxArray_to_Matrix (pargin [0], "M", false, false) ;
if (M == NULL && !mxIsEmpty (pargin [0]))
{
FREE_ALL ;
mexErrMsgTxt ("M failed") ;
}
// get Mask_comp
bool GET_SCALAR (1, bool, Mask_comp, 0) ;
// get A (shallow copy)
A = GB_mx_mxArray_to_Matrix (pargin [2], "A", false, true) ;
if (A == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("A failed") ;
}
// get B (shallow copy)
B = GB_mx_mxArray_to_Matrix (pargin [3], "B", false, true) ;
if (B == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("B failed") ;
}
// allocate Bflops (note the calloc)
int64_t bnvec = B->nvec ;
size_t bfsize = (bnvec+1) * sizeof (int64_t) ;
int64_t *Bflops = mxMalloc (bfsize) ;
memset (Bflops, 0, bfsize) ;
// compute the flop count
int64_t Mwork = 0 ;
GB_AxB_saxpy3_flopcount (&Mwork, Bflops, M, Mask_comp, A, B, Context) ;
// return result
pargout [0] = mxCreateDoubleMatrix (1, bnvec+1, mxREAL) ;
double *Bflops_builtin = mxGetPr (pargout [0]) ;
for (int64_t kk = 0 ; kk <= bnvec ; kk++)
{
Bflops_builtin [kk] = (double) Bflops [kk] ;
}
pargout [1] = mxCreateDoubleScalar (Mwork) ;
mxFree (Bflops) ;
FREE_ALL ;
}
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