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//------------------------------------------------------------------------------
// GB_bitmap_M_scatter_whole: scatter M into/from the C bitmap
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_bitmap_assign_methods.h"
void GB_bitmap_M_scatter_whole // scatter M into the C bitmap
(
// input/output:
GrB_Matrix C,
// inputs:
const GrB_Matrix M, // mask to scatter into the C bitmap
const bool Mask_struct, // true if M is structural, false if valued
const int operation, // +=2, -=2, or %=2
const int64_t *M_ek_slicing, // size 3*M_ntasks+1
const int M_ntasks,
const int M_nthreads,
GB_Context Context
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
ASSERT_MATRIX_OK (M, "M for bitmap scatter, whole", GB0) ;
ASSERT (GB_IS_SPARSE (M) || GB_IS_HYPERSPARSE (M)) ;
ASSERT (GB_JUMBLED_OK (M)) ;
ASSERT (M_ntasks > 0) ;
ASSERT (M_nthreads > 0) ;
ASSERT (M_ek_slicing != NULL) ;
//--------------------------------------------------------------------------
// get C and M
//--------------------------------------------------------------------------
GB_GET_M
int8_t *Cb = C->b ;
const int64_t cvlen = C->vlen ;
int64_t cnvals = 0 ;
//--------------------------------------------------------------------------
// scatter M into the C bitmap
//--------------------------------------------------------------------------
switch (operation)
{
case GB_BITMAP_M_SCATTER_PLUS_2 : // Cb (i,j) += 2
#undef GB_MASK_WORK
#define GB_MASK_WORK(pC) Cb [pC] += 2
#include "GB_bitmap_assign_M_all_template.c"
break ;
case GB_BITMAP_M_SCATTER_MINUS_2 : // Cb (i,j) -= 2
#undef GB_MASK_WORK
#define GB_MASK_WORK(pC) Cb [pC] -= 2
#include "GB_bitmap_assign_M_all_template.c"
break ;
case GB_BITMAP_M_SCATTER_SET_2 : // Cb (i,j) = 2
#undef GB_MASK_WORK
#define GB_MASK_WORK(pC) Cb [pC] = 2
#include "GB_bitmap_assign_M_all_template.c"
break ;
default: ;
}
}
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