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//------------------------------------------------------------------------------
// GB_subassign_23: C += A where C is full and A is any matrix
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// Method 23: C += A, where C is full
// M: NULL
// Mask_comp: false
// Mask_struct: ignored
// C_replace: false
// accum: present
// A: matrix
// S: none
// The type of C must match the type of x and z for the accum function, since
// C(i,j) = accum (C(i,j), A(i,j)) is handled. The generic case here can
// typecast A(i,j) but not C(i,j). The case for typecasting of C is handled by
// Method 04.
// C and A can have any sparsity structure, but C must be as-if-full.
#include "binaryop/GB_binop.h"
#include "assign/GB_subassign_dense.h"
#include "jitifyer/GB_stringify.h"
#ifndef GBCOMPACT
#include "GB_control.h"
#include "FactoryKernels/GB_aop__include.h"
#endif
#include "include/GB_unused.h"
#define GB_GENERIC
#define GB_SCALAR_ASSIGN 0
#include "assign/include/GB_assign_shared_definitions.h"
#undef GB_FREE_ALL
#define GB_FREE_ALL ;
GrB_Info GB_subassign_23 // C += A; C is full
(
GrB_Matrix C, // input/output matrix
const GrB_Matrix A, // input matrix
const GrB_BinaryOp accum, // operator to apply
GB_Werk Werk
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GrB_Info info ;
GrB_Matrix S = NULL ; // not constructed
ASSERT (!GB_any_aliased (C, A)) ; // NO ALIAS of C==A
ASSERT_MATRIX_OK (C, "C for C+=A", GB0) ;
ASSERT (!GB_PENDING (C)) ;
ASSERT (!GB_JUMBLED (C)) ;
ASSERT (!GB_ZOMBIES (C)) ;
ASSERT (GB_IS_FULL (C)) ;
ASSERT_MATRIX_OK (A, "A for C+=A", GB0) ;
ASSERT (!GB_PENDING (A)) ;
ASSERT (GB_JUMBLED_OK (A)) ;
ASSERT (!GB_ZOMBIES (A)) ;
ASSERT_BINARYOP_OK (accum, "accum for C+=A", GB0) ;
ASSERT (!GB_OP_IS_POSITIONAL (accum)) ;
ASSERT (A->vlen == C->vlen) ;
ASSERT (A->vdim == C->vdim) ;
//--------------------------------------------------------------------------
// get the operator
//--------------------------------------------------------------------------
int nthreads_max = GB_Context_nthreads_max ( ) ;
double chunk = GB_Context_chunk ( ) ;
if (accum->opcode == GB_FIRST_binop_code || C->iso)
{
// nothing to do
return (GrB_SUCCESS) ;
}
// C = accum (C,A) will be computed
ASSERT (!C->iso) ;
// TODO: the types of C, Z, and X need not match for the JIT kernel
ASSERT (C->type == accum->ztype) ;
ASSERT (C->type == accum->xtype) ;
ASSERT (GB_Type_compatible (A->type, accum->ytype)) ;
//--------------------------------------------------------------------------
// via the factory kernel
//--------------------------------------------------------------------------
info = GrB_NO_VALUE ;
#ifndef GBCOMPACT
GB_IF_FACTORY_KERNELS_ENABLED
{
//----------------------------------------------------------------------
// define the worker for the switch factory
//----------------------------------------------------------------------
#define GB_sub23(accum,xname) GB (_subassign_23_ ## accum ## xname)
#define GB_BINOP_WORKER(accum,xname) \
{ \
info = GB_sub23 (accum,xname) (C, A, Werk) ; \
} \
break ;
//----------------------------------------------------------------------
// launch the switch factory
//----------------------------------------------------------------------
GB_Opcode opcode ;
GB_Type_code xcode, ycode, zcode ;
// C = C + A so A must cast to the Y input of the accum operator. To
// use the factory kernel, A->type and accum->ytype must be identical.
if (/* C->type == accum->ztype && C->type == accum->xtype && */
GB_binop_builtin (C->type, false, A->type, false,
accum, false, &opcode, &xcode, &ycode, &zcode))
{
// accumulate sparse matrix into full matrix with built-in operator
#define GB_NO_FIRST
#define GB_XTYPE_AND_ZTYPE_MUST_MATCH
#include "binaryop/factory/GB_binop_factory.c"
}
}
#endif
//--------------------------------------------------------------------------
// via the JIT or PreJIT kernel
//--------------------------------------------------------------------------
if (info == GrB_NO_VALUE)
{
info = GB_subassign_jit (C,
/* C_replace: */ false,
/* I, ni, nI, Ikind, Icolon: */ NULL, false, 0, 0, GB_ALL, NULL,
/* J, nj, nJ, Jkind, Jcolon: */ NULL, false, 0, 0, GB_ALL, NULL,
/* M: */ NULL,
/* Mask_comp: */ false,
/* Mask_struct: */ true,
/* accum: */ accum,
/* A: */ A,
/* scalar, scalar_type: */ NULL, NULL,
/* S: */ NULL,
GB_SUBASSIGN, GB_JIT_KERNEL_SUBASSIGN_23, "subassign_23",
Werk) ;
}
//--------------------------------------------------------------------------
// via the generic kernel
//--------------------------------------------------------------------------
if (info == GrB_NO_VALUE)
{
#include "generic/GB_generic.h"
GB_BURBLE_MATRIX (A, "(generic C+=A) ") ;
GxB_binary_function faccum = accum->binop_function ;
size_t csize = C->type->size ;
size_t asize = A->type->size ;
size_t ysize = accum->ytype->size ;
// A is typecasted to y
GB_cast_function cast_A_to_Y ;
cast_A_to_Y = GB_cast_factory (accum->ytype->code, A->type->code) ;
// get the iso value of A
GB_DECLAREY (ywork) ;
if (A->iso)
{
// ywork = (ytype) Ax [0]
cast_A_to_Y (ywork, A->x, asize) ;
}
#define C_iso false
#undef GB_ACCUMULATE_aij
#define GB_ACCUMULATE_aij(Cx,pC,Ax,pA,A_iso,ywork,C_iso) \
{ \
/* Cx [pC] += (ytype) Ax [A_iso ? 0 : pA] */ \
if (A_iso) \
{ \
faccum (Cx +((pC)*csize), Cx +((pC)*csize), ywork) ; \
} \
else \
{ \
GB_DECLAREY (ywork) ; \
cast_A_to_Y (ywork, Ax +((pA)*asize), asize) ; \
faccum (Cx +((pC)*csize), Cx +((pC)*csize), ywork) ; \
} \
}
#include "assign/template/GB_subassign_23_template.c"
info = GrB_SUCCESS ;
}
//--------------------------------------------------------------------------
// free workspace and return result
//--------------------------------------------------------------------------
if (info == GrB_SUCCESS)
{
ASSERT_MATRIX_OK (C, "C+=A output", GB0) ;
}
return (info) ;
}
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