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//------------------------------------------------------------------------------
// GB_AxB_rowscale_template: C=D*B where D is a square diagonal matrix
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// This template is not used If C is iso, since all that is needed is to create
// C as a shallow-copy of the pattern of A.
// B and C can be jumbled. D cannot, but it is a diagonal matrix so it is
// never jumbled.
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
ASSERT (GB_JUMBLED_OK (C)) ;
ASSERT (!GB_JUMBLED (D)) ;
ASSERT (GB_JUMBLED_OK (B)) ;
ASSERT (!C->iso) ;
//--------------------------------------------------------------------------
// get D and B
//--------------------------------------------------------------------------
#if !GB_A_IS_PATTERN
const GB_ATYPE *restrict Dx = (GB_ATYPE *) D->x ;
#endif
const bool D_iso = D->iso ;
#if !GB_B_IS_PATTERN
const GB_BTYPE *restrict Bx = (GB_BTYPE *) B->x ;
#endif
const bool B_iso = B->iso ;
const int64_t *restrict Bi = B->i ;
const int64_t bnz = GB_nnz (B) ;
const int64_t bvlen = B->vlen ;
//--------------------------------------------------------------------------
// C=D*B
//--------------------------------------------------------------------------
int ntasks = nthreads ;
ntasks = GB_IMIN (bnz, ntasks) ;
int tid ;
#pragma omp parallel for num_threads(nthreads) schedule(static)
for (tid = 0 ; tid < ntasks ; tid++)
{
int64_t pstart, pend ;
GB_PARTITION (pstart, pend, bnz, tid, ntasks) ;
GB_PRAGMA_SIMD_VECTORIZE
for (int64_t p = pstart ; p < pend ; p++)
{
int64_t i = GBI (Bi, p, bvlen) ; // get row index of B(i,j)
GB_GETA (dii, Dx, i, D_iso) ; // dii = D(i,i)
GB_GETB (bij, Bx, p, B_iso) ; // bij = B(i,j)
GB_BINOP (GB_CX (p), dii, bij, 0, 0) ; // C(i,j) = dii*bij
}
}
}
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