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//------------------------------------------------------------------------------
// GB_convert_sparse_to_bitmap: convert from sparse/hypersparse to bitmap
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_ek_slice.h"
#ifndef GBCUDA_DEV
#include "GB_type__include.h"
#endif
#define GB_FREE_WORKSPACE \
{ \
GB_WERK_POP (A_ek_slicing, int64_t) ; \
}
#define GB_FREE_ALL \
{ \
GB_FREE_WORKSPACE ; \
GB_FREE (&Ax_new, Ax_size) ; \
GB_FREE (&Ab, Ab_size) ; \
}
GrB_Info GB_convert_sparse_to_bitmap // convert sparse/hypersparse to bitmap
(
GrB_Matrix A, // matrix to convert from sparse to bitmap
GB_Context Context
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_WERK_DECLARE (A_ek_slicing, int64_t) ;
int8_t *restrict Ab = NULL ; size_t Ab_size = 0 ;
GB_void *restrict Ax = NULL ; size_t Ax_size = 0 ;
GB_void *restrict Ax_new = NULL ;
ASSERT_MATRIX_OK (A, "A converting sparse/hypersparse to bitmap", GB0) ;
ASSERT (!GB_IS_FULL (A)) ;
ASSERT (!GB_IS_BITMAP (A)) ;
ASSERT (GB_IS_SPARSE (A) || GB_IS_HYPERSPARSE (A)) ;
ASSERT (!GB_PENDING (A)) ;
ASSERT (GB_JUMBLED_OK (A)) ; // A can be jumbled on input
ASSERT (GB_ZOMBIES_OK (A)) ; // A can have zombies on input
//--------------------------------------------------------------------------
// determine the maximum number of threads to use
//--------------------------------------------------------------------------
GB_GET_NTHREADS_MAX (nthreads_max, chunk, Context) ;
//--------------------------------------------------------------------------
// determine if the conversion can be done in-place
//--------------------------------------------------------------------------
// A->x does not change if A is as-if-full or A is iso
bool A_iso = A->iso ;
bool A_as_is_full = GB_as_if_full (A) ;
bool in_place = A_as_is_full || A_iso ;
//--------------------------------------------------------------------------
// allocate A->b
//--------------------------------------------------------------------------
const int64_t anz = GB_nnz (A) ;
GB_BURBLE_N (anz, "(sparse to bitmap) ") ;
const int64_t avdim = A->vdim ;
const int64_t avlen = A->vlen ;
int64_t anzmax ;
if (!GB_int64_multiply ((GrB_Index *) &anzmax, avdim, avlen))
{
// problem too large
return (GrB_OUT_OF_MEMORY) ;
}
anzmax = GB_IMAX (anzmax, 1) ;
Ab = GB_MALLOC (anzmax, int8_t, &Ab_size) ;
if (Ab == NULL)
{
// out of memory
return (GrB_OUT_OF_MEMORY) ;
}
//--------------------------------------------------------------------------
// allocate the new A->x
//--------------------------------------------------------------------------
const size_t asize = A->type->size ;
bool Ax_shallow ;
if (in_place)
{
// keep the existing A->x
Ax = (GB_void *) A->x ;
Ax_shallow = A->x_shallow ; Ax_size = A->x_size ;
}
else
{
// A->x must be modified to fit the bitmap structure. A->x is calloc'd
// since otherwise it would contain uninitialized values where A->b is
// false and entries are not present.
Ax_new = GB_CALLOC (anzmax * asize, GB_void, &Ax_size) ; // x:OK:calloc
Ax_shallow = false ;
if (Ax_new == NULL)
{
// out of memory
GB_FREE_ALL ;
return (GrB_OUT_OF_MEMORY) ;
}
Ax = Ax_new ;
}
//--------------------------------------------------------------------------
// scatter the pattern and values into the new bitmap
//--------------------------------------------------------------------------
int64_t nzombies = A->nzombies ;
if (A_as_is_full)
{
//----------------------------------------------------------------------
// the sparse A has all entries or is iso: convert in-place
//----------------------------------------------------------------------
ASSERT (nzombies == 0) ;
// set all of Ab [0..anz-1] to 1, in parallel
GB_memset (Ab, 1, anz, nthreads_max) ;
}
else
{
//----------------------------------------------------------------------
// set all of Ab to zero
//----------------------------------------------------------------------
GB_memset (Ab, 0, anzmax, nthreads_max) ;
//----------------------------------------------------------------------
// scatter the values and pattern of A into the bitmap
//----------------------------------------------------------------------
int A_nthreads, A_ntasks ;
GB_SLICE_MATRIX (A, 8, chunk) ;
const int64_t *restrict Ap = A->p ;
const int64_t *restrict Ah = A->h ;
const int64_t *restrict Ai = A->i ;
bool done = false ;
if (A_iso)
{
// A is iso; numerical entries are not modified
#define GB_COPY(Axnew,pnew,Axold,p) ;
#include "GB_convert_sparse_to_bitmap_template.c"
}
else
{
#ifndef GBCUDA_DEV
{
switch (asize)
{
#undef GB_COPY
#define GB_COPY(Axnew,pnew,Axold,p) \
Axnew [pnew] = Axold [p] ;
case GB_1BYTE : // uint8, int8, bool, or 1-byte user
#define GB_ATYPE uint8_t
#include "GB_convert_sparse_to_bitmap_template.c"
break ;
case GB_2BYTE : // uint16, int16, or 2-byte user-defined
#define GB_ATYPE uint16_t
#include "GB_convert_sparse_to_bitmap_template.c"
break ;
case GB_4BYTE : // uint32, int32, float, or 4-byte user
#define GB_ATYPE uint32_t
#include "GB_convert_sparse_to_bitmap_template.c"
break ;
case GB_8BYTE : // uint64, int64, double, float complex,
// or 8-byte user defined
#define GB_ATYPE uint64_t
#include "GB_convert_sparse_to_bitmap_template.c"
break ;
case GB_16BYTE : // double complex or 16-byte user-defined
#define GB_ATYPE GB_blob16
#include "GB_convert_sparse_to_bitmap_template.c"
break ;
default:;
}
}
#endif
if (!done)
{
// with user-defined types of other sizes
#define GB_ATYPE GB_void
#undef GB_COPY
#define GB_COPY(Axnew,pnew,Axold,p) \
memcpy (Axnew +(pnew)*asize, Axold +(p)*asize, asize)
#include "GB_convert_sparse_to_bitmap_template.c"
}
}
}
//--------------------------------------------------------------------------
// free prior content of A and transplant the new content
//--------------------------------------------------------------------------
if (in_place)
{
// if in-place, remove A->x from A so it is not freed
A->x = NULL ;
A->x_shallow = false ;
}
GB_phybix_free (A) ;
A->iso = A_iso ; // OK: convert_sparse_to_bitmap, keep iso
A->b = Ab ; A->b_size = Ab_size ; A->b_shallow = false ;
Ab = NULL ;
A->x = Ax ; A->x_size = Ax_size ; A->x_shallow = Ax_shallow ;
A->nvals = anz - nzombies ;
ASSERT (A->nzombies == 0) ;
A->plen = -1 ;
A->nvec = avdim ;
A->nvec_nonempty = (avlen == 0) ? 0 : avdim ;
A->magic = GB_MAGIC ;
//--------------------------------------------------------------------------
// free workspace and return result
//--------------------------------------------------------------------------
GB_FREE_WORKSPACE ;
ASSERT_MATRIX_OK (A, "A converted from sparse to bitmap", GB0) ;
ASSERT (GB_IS_BITMAP (A)) ;
ASSERT (!GB_ZOMBIES (A)) ;
ASSERT (!GB_JUMBLED (A)) ;
ASSERT (!GB_PENDING (A)) ;
return (GrB_SUCCESS) ;
}
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