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/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
* Copyright (c) 2004-2019 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2009 Oak Ridge National Labs. All rights reserved.
* Copyright (c) 2011 NVIDIA Corporation. All rights reserved.
* Copyright (c) 2017-2018 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2020 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2020-2021 IBM Corporation. All rights reserved.
* Copyright (c) 2022 Advanced Micro Devices, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#ifndef OPAL_DATATYPE_PACK_H_HAS_BEEN_INCLUDED
#define OPAL_DATATYPE_PACK_H_HAS_BEEN_INCLUDED
#include "opal_config.h"
#include "opal/datatype/opal_datatype_pack_unpack_predefined.h"
#if !defined(CHECKSUM)
/* Make use of existing macro to do device style memcpy */
# undef MEMCPY_CSUM
# define MEMCPY_CSUM(DST, SRC, BLENGTH, CONVERTOR) \
CONVERTOR->cbmemcpy((DST), (SRC), (BLENGTH), (CONVERTOR))
#endif
/**
* This function deals only with partial elements. The COUNT points however to the whole leftover
* count, but this function is only expected to operate on an amount less than blength, that would
* allow the rest of the pack process to handle only entire blength blocks (plus the left over).
*
* Return 1 if we are now aligned on a block, 0 otherwise.
*/
static inline int pack_partial_blocklen(opal_convertor_t *CONVERTOR, const dt_elem_desc_t *ELEM,
size_t *COUNT, unsigned char **memory,
unsigned char **packed, size_t *SPACE)
{
const ddt_elem_desc_t *_elem = &((ELEM)->elem);
size_t do_now_bytes = opal_datatype_basicDatatypes[_elem->common.type]->size;
size_t do_now = *(COUNT);
unsigned char *_memory = (*memory) + _elem->disp;
unsigned char *_packed = *packed;
assert(*(COUNT) <= ((size_t) _elem->count * _elem->blocklen));
/**
* First check if we already did something on this element ? The COUNT is the number
* of remaining predefined types in the current elem, not how many predefined types
* should be manipulated in the current call (this number is instead reflected on the
* SPACE).
*/
if (0 == (do_now = (*COUNT) % _elem->blocklen))
return 1;
size_t left_in_block = do_now; /* left in the current blocklen */
if ((do_now_bytes * do_now) > *(SPACE))
do_now = (*SPACE) / do_now_bytes;
do_now_bytes *= do_now;
OPAL_DATATYPE_SAFEGUARD_POINTER(_memory, do_now_bytes, (CONVERTOR)->pBaseBuf,
(CONVERTOR)->pDesc, (CONVERTOR)->count);
DO_DEBUG(opal_output(0, "pack memcpy( %p, %p, %lu ) => space %lu [partial]\n", (void *) _packed,
(void *) _memory, (unsigned long) do_now_bytes,
(unsigned long) (*(SPACE))););
MEMCPY_CSUM(_packed, _memory, do_now_bytes, (CONVERTOR));
*(memory) += (ptrdiff_t) do_now_bytes;
if (do_now == left_in_block) /* compensate if completed a blocklen */
*(memory) += _elem->extent
- (_elem->blocklen * opal_datatype_basicDatatypes[_elem->common.type]->size);
*(COUNT) -= do_now;
*(SPACE) -= do_now_bytes;
*(packed) += do_now_bytes;
return (do_now == left_in_block);
}
/**
* Pack entire blocks, plus a possible remainder if SPACE is constrained to less than COUNT
* elements.
*/
static inline void pack_predefined_data(opal_convertor_t *CONVERTOR, const dt_elem_desc_t *ELEM,
size_t *COUNT, unsigned char **memory,
unsigned char **packed, size_t *SPACE)
{
const ddt_elem_desc_t *_elem = &((ELEM)->elem);
size_t blocklen_bytes = opal_datatype_basicDatatypes[_elem->common.type]->size;
size_t cando_count = *(COUNT), do_now_bytes;
unsigned char *_memory = (*memory) + _elem->disp;
unsigned char *_packed = *packed;
assert(0 == (cando_count % _elem->blocklen)); /* no partials here */
assert(*(COUNT) <= ((size_t) _elem->count * _elem->blocklen));
if ((blocklen_bytes * cando_count) > *(SPACE))
cando_count = (*SPACE) / blocklen_bytes;
/* preemptively update the number of COUNT we will return. */
*(COUNT) -= cando_count;
if (_elem->blocklen < 9) {
if (!(CONVERTOR->flags & CONVERTOR_ACCELERATOR)
&& OPAL_LIKELY(
OPAL_SUCCESS
== opal_datatype_pack_predefined_element(&_memory, &_packed, cando_count, _elem))) {
goto update_and_return;
}
/* else unrecognized _elem->common.type, use the memcpy path */
}
if (_elem->blocklen == 1) {
for (; cando_count > 0; cando_count--) {
OPAL_DATATYPE_SAFEGUARD_POINTER(_memory, blocklen_bytes, (CONVERTOR)->pBaseBuf,
(CONVERTOR)->pDesc, (CONVERTOR)->count);
DO_DEBUG(opal_output(0, "pack memcpy( %p, %p, %lu ) => space %lu [blen = 1]\n",
(void *) _packed, (void *) _memory, (unsigned long) blocklen_bytes,
(unsigned long) (*(SPACE) - (_packed - *(packed)))););
MEMCPY_CSUM(_packed, _memory, blocklen_bytes, (CONVERTOR));
_packed += blocklen_bytes;
_memory += _elem->extent;
}
goto update_and_return;
}
if ((1 < _elem->count) && (_elem->blocklen <= cando_count)) {
blocklen_bytes *= _elem->blocklen;
do { /* Do as many full blocklen as possible */
OPAL_DATATYPE_SAFEGUARD_POINTER(_memory, blocklen_bytes, (CONVERTOR)->pBaseBuf,
(CONVERTOR)->pDesc, (CONVERTOR)->count);
DO_DEBUG(opal_output(0, "pack 2. memcpy( %p, %p, %lu ) => space %lu\n",
(void *) _packed, (void *) _memory, (unsigned long) blocklen_bytes,
(unsigned long) (*(SPACE) - (_packed - *(packed)))););
MEMCPY_CSUM(_packed, _memory, blocklen_bytes, (CONVERTOR));
_packed += blocklen_bytes;
_memory += _elem->extent;
cando_count -= _elem->blocklen;
} while (_elem->blocklen <= cando_count);
}
/**
* As an epilog do anything left from the last blocklen.
*/
if (0 != cando_count) {
assert((cando_count < _elem->blocklen)
|| ((1 == _elem->count) && (cando_count <= _elem->blocklen)));
do_now_bytes = cando_count * opal_datatype_basicDatatypes[_elem->common.type]->size;
OPAL_DATATYPE_SAFEGUARD_POINTER(_memory, do_now_bytes, (CONVERTOR)->pBaseBuf,
(CONVERTOR)->pDesc, (CONVERTOR)->count);
DO_DEBUG(opal_output(0, "pack 3. memcpy( %p, %p, %lu ) => space %lu [epilog]\n",
(void *) _packed, (void *) _memory, (unsigned long) do_now_bytes,
(unsigned long) (*(SPACE) - (_packed - *(packed)))););
MEMCPY_CSUM(_packed, _memory, do_now_bytes, (CONVERTOR));
_memory += do_now_bytes;
_packed += do_now_bytes;
}
update_and_return:
*(memory) = _memory - _elem->disp;
*(SPACE) -= (_packed - *packed);
*(packed) = _packed;
}
static inline void pack_contiguous_loop(opal_convertor_t *CONVERTOR, const dt_elem_desc_t *ELEM,
size_t *COUNT, unsigned char **memory,
unsigned char **packed, size_t *SPACE)
{
const ddt_loop_desc_t *_loop = (ddt_loop_desc_t *) (ELEM);
const ddt_endloop_desc_t *_end_loop = (ddt_endloop_desc_t *) ((ELEM) + _loop->items);
unsigned char *_memory = (*memory) + _end_loop->first_elem_disp;
size_t _copy_loops = *(COUNT);
if ((_copy_loops * _end_loop->size) > *(SPACE))
_copy_loops = (*(SPACE) / _end_loop->size);
for (size_t _i = 0; _i < _copy_loops; _i++) {
OPAL_DATATYPE_SAFEGUARD_POINTER(_memory, _end_loop->size, (CONVERTOR)->pBaseBuf,
(CONVERTOR)->pDesc, (CONVERTOR)->count);
DO_DEBUG(opal_output(0, "pack 3. memcpy( %p, %p, %lu ) => space %lu\n", (void *) *(packed),
(void *) _memory, (unsigned long) _end_loop->size,
(unsigned long) (*(SPACE) -_i * _end_loop->size)););
MEMCPY_CSUM(*(packed), _memory, _end_loop->size, (CONVERTOR));
*(packed) += _end_loop->size;
_memory += _loop->extent;
}
*(memory) = _memory - _end_loop->first_elem_disp;
*(SPACE) -= _copy_loops * _end_loop->size;
*(COUNT) -= _copy_loops;
}
#define PACK_PARTIAL_BLOCKLEN(CONVERTOR, /* the convertor */ \
ELEM, /* the basic element to be packed */ \
COUNT, /* the number of elements */ \
MEMORY, /* the source pointer (char*) */ \
PACKED, /* the destination pointer (char*) */ \
SPACE) /* the space in the destination buffer */ \
pack_partial_blocklen((CONVERTOR), (ELEM), &(COUNT), &(MEMORY), &(PACKED), &(SPACE))
#define PACK_PREDEFINED_DATATYPE(CONVERTOR, /* the convertor */ \
ELEM, /* the basic element to be packed */ \
COUNT, /* the number of elements */ \
MEMORY, /* the source pointer (char*) */ \
PACKED, /* the destination pointer (char*) */ \
SPACE) /* the space in the destination buffer */ \
pack_predefined_data((CONVERTOR), (ELEM), &(COUNT), &(MEMORY), &(PACKED), &(SPACE))
#define PACK_CONTIGUOUS_LOOP(CONVERTOR, ELEM, COUNT, MEMORY, PACKED, SPACE) \
pack_contiguous_loop((CONVERTOR), (ELEM), &(COUNT), &(MEMORY), &(PACKED), &(SPACE))
#endif /* OPAL_DATATYPE_PACK_H_HAS_BEEN_INCLUDED */
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