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libgomp.texi: Add GCN doc for omp_target_memcpy_rect 

libgomp/ChangeLog:

	* libgomp.texi (omp_target_memcpy_rect_async,
	omp_target_memcpy_rect): Add @ref to 'Offload-Target Specifics'.
	(AMD Radeon (GCN)): Document how memcpy_rect is implemented.
	(nvptx): Move item about memcpy_rect item down; use present tense.
This commit is contained in:
Tobias Burnus 2025-04-07 09:04:53 +02:00
parent a1a0026c65
commit 0c63c7524b
1 changed files with 12 additions and 7 deletions
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libgomp/libgomp.texi
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@ -2316,7 +2316,7 @@ the initial device.
@end multitable
@item @emph{See also}:
@ref{omp_target_memcpy_rect_async}, @ref{omp_target_memcpy}
@ref{omp_target_memcpy_rect_async}, @ref{omp_target_memcpy}, @ref{Offload-Target Specifics}
@item @emph{Reference}:
@uref{https://www.openmp.org, OpenMP specification v5.1}, Section 3.8.6
@ -2391,7 +2391,7 @@ the initial device.
@end multitable
@item @emph{See also}:
@ref{omp_target_memcpy_rect}, @ref{omp_target_memcpy_async}
@ref{omp_target_memcpy_rect}, @ref{omp_target_memcpy_async}, @ref{Offload-Target Specifics}
@item @emph{Reference}:
@uref{https://www.openmp.org, OpenMP specification v5.1}, Section 3.8.8
@ -6911,6 +6911,11 @@ The implementation remark:
@code{omp_thread_mem_alloc}, all use low-latency memory as first
preference, and fall back to main graphics memory when the low-latency
pool is exhausted.
@item The OpenMP routines @code{omp_target_memcpy_rect} and
@code{omp_target_memcpy_rect_async} and the @code{target update}
directive for non-contiguous list items use the 3D memory-copy function
of the HSA library. Higher dimensions call this functions in a loop and
are therefore supported.
@item The unique identifier (UID), used with OpenMP's API UID routines, is the
value returned by the HSA runtime library for @code{HSA_AMD_AGENT_INFO_UUID}.
For GPUs, it is currently @samp{GPU-} followed by 16 lower-case hex digits,
@ -7048,11 +7053,6 @@ The implementation remark:
devices (``host fallback'').
@item The default per-warp stack size is 128 kiB; see also @code{-msoft-stack}
in the GCC manual.
@item The OpenMP routines @code{omp_target_memcpy_rect} and
@code{omp_target_memcpy_rect_async} and the @code{target update}
directive for non-contiguous list items will use the 2D and 3D
memory-copy functions of the CUDA library. Higher dimensions will
call those functions in a loop and are therefore supported.
@item Low-latency memory (@code{omp_low_lat_mem_space}) is supported when the
the @code{access} trait is set to @code{cgroup}, and libgomp has
been built for PTX ISA version 4.1 or higher (such as in GCC's
@ -7070,6 +7070,11 @@ The implementation remark:
@code{omp_thread_mem_alloc}, all use low-latency memory as first
preference, and fall back to main graphics memory when the low-latency
pool is exhausted.
@item The OpenMP routines @code{omp_target_memcpy_rect} and
@code{omp_target_memcpy_rect_async} and the @code{target update}
directive for non-contiguous list items use the 2D and 3D memory-copy
functions of the CUDA library. Higher dimensions call those functions
in a loop and are therefore supported.
@item The unique identifier (UID), used with OpenMP's API UID routines, consists
of the @samp{GPU-} prefix followed by the 16-bytes UUID as returned by
the CUDA runtime library. This UUID is output in grouped lower-case