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author | Marcel Vollweiler <marcel@codesourcery.com> | 2022-05-20 02:08:36 -0700 |
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committer | Marcel Vollweiler <marcel@codesourcery.com> | 2022-05-20 02:29:32 -0700 |
commit | 6c420193e86b39a09304b2845335571eefe24d5d (patch) | |
tree | b19c3d0bd8bacae35e8a6b1e9031e4aa637e219b /libgomp/omp.h.in | |
parent | 5143faee0d0edfd5849c5f54677cb699bf84a5db (diff) | |
download | gcc-6c420193e86b39a09304b2845335571eefe24d5d.zip gcc-6c420193e86b39a09304b2845335571eefe24d5d.tar.gz gcc-6c420193e86b39a09304b2845335571eefe24d5d.tar.bz2 |
libgomp: Add new runtime routines omp_target_memcpy_async and omp_target_memcpy_rect_async
This patch adds two new OpenMP runtime routines: omp_target_memcpy_async and
omp_target_memcpy_rect_async. Both functions are introduced in OpenMP 5.1 as
asynchronous variants of omp_target_memcpy and omp_target_memcpy_rect.
In contrast to the synchronous variants, the asynchronous functions have two
additional function parameters to allow the specification of task dependences:
int depobj_count
omp_depend_t *depobj_list
integer(c_int), value :: depobj_count
integer(omp_depend_kind), optional :: depobj_list(*)
The implementation splits the synchronous functions into two parts: (a) check
and (b) copy. Then (a) is used in the asynchronous functions for the sequential
part, and the actual copy process (b) is executed in a new created task. The
sequential part (a) takes into account the requirements for the return values:
"The routine returns zero if successful. Otherwise, it returns a non-zero
value." (omp_target_memcpy_async, OpenMP 5.1 spec, section 3.8.7)
"An application can determine the number of inclusive dimensions supported by an
implementation by passing NULL pointers (or C_NULL_PTR, for Fortran) for both
dst and src. The routine returns the number of dimensions supported by the
implementation for the specified device numbers. No copy operation is
performed." (omp_target_memcpy_rect_async, OpenMP 5.1 spec, section 3.8.8)
Due to asynchronicity an error is thrown if the asynchronous memcpy is not
successful (in contrast to the synchronous functions which use a return
value unequal to zero).
gcc/ChangeLog:
* omp-low.cc (omp_runtime_api_call): Added target_memcpy_async and
target_memcpy_rect_async to omp_runtime_apis array.
libgomp/ChangeLog:
* libgomp.map: Added omp_target_memcpy_async and
omp_target_memcpy_rect_async.
* libgomp.texi: Both functions are now supported.
* omp.h.in: Added omp_target_memcpy_async and
omp_target_memcpy_rect_async.
* omp_lib.f90.in: Added interfaces for both new functions.
* omp_lib.h.in: Likewise.
* target.c (ialias_redirect): Added for GOMP_task.
(omp_target_memcpy): Restructured into check and copy part.
(omp_target_memcpy_check): New helper function for omp_target_memcpy and
omp_target_memcpy_async that checks requirements.
(omp_target_memcpy_copy): New helper function for omp_target_memcpy and
omp_target_memcpy_async that performs the memcpy.
(omp_target_memcpy_async_helper): New helper function that is used in
omp_target_memcpy_async for the asynchronous task.
(omp_target_memcpy_async): Added.
(omp_target_memcpy_rect): Restructured into check and copy part.
(omp_target_memcpy_rect_check): New helper function for
omp_target_memcpy_rect and omp_target_memcpy_rect_async that checks
requirements.
(omp_target_memcpy_rect_copy): New helper function for
omp_target_memcpy_rect and omp_target_memcpy_rect_async that performs
the memcpy.
(omp_target_memcpy_rect_async_helper): New helper function that is used
in omp_target_memcpy_rect_async for the asynchronous task.
(omp_target_memcpy_rect_async): Added.
* task.c (ialias): Added for GOMP_task.
* testsuite/libgomp.c-c++-common/target-memcpy-async-1.c: New test.
* testsuite/libgomp.c-c++-common/target-memcpy-async-2.c: New test.
* testsuite/libgomp.c-c++-common/target-memcpy-rect-async-1.c: New test.
* testsuite/libgomp.c-c++-common/target-memcpy-rect-async-2.c: New test.
* testsuite/libgomp.fortran/target-memcpy-async-1.f90: New test.
* testsuite/libgomp.fortran/target-memcpy-async-2.f90: New test.
* testsuite/libgomp.fortran/target-memcpy-rect-async-1.f90: New test.
* testsuite/libgomp.fortran/target-memcpy-rect-async-2.f90: New test.
Diffstat (limited to 'libgomp/omp.h.in')
-rw-r--r-- | libgomp/omp.h.in | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libgomp/omp.h.in b/libgomp/omp.h.in index f427f42..c8427fc 100644 --- a/libgomp/omp.h.in +++ b/libgomp/omp.h.in @@ -272,6 +272,10 @@ extern int omp_target_is_present (const void *, int) __GOMP_NOTHROW; extern int omp_target_memcpy (void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__, __SIZE_TYPE__, int, int) __GOMP_NOTHROW; +extern int omp_target_memcpy_async (void *, const void *, __SIZE_TYPE__, + __SIZE_TYPE__, __SIZE_TYPE__, int, int, + int, omp_depend_t *) + __GOMP_NOTHROW; extern int omp_target_memcpy_rect (void *, const void *, __SIZE_TYPE__, int, const __SIZE_TYPE__ *, const __SIZE_TYPE__ *, @@ -279,6 +283,14 @@ extern int omp_target_memcpy_rect (void *, const void *, __SIZE_TYPE__, int, const __SIZE_TYPE__ *, const __SIZE_TYPE__ *, int, int) __GOMP_NOTHROW; +extern int omp_target_memcpy_rect_async (void *, const void *, __SIZE_TYPE__, + int, const __SIZE_TYPE__ *, + const __SIZE_TYPE__ *, + const __SIZE_TYPE__ *, + const __SIZE_TYPE__ *, + const __SIZE_TYPE__ *, int, int, int, + omp_depend_t *) + __GOMP_NOTHROW; extern int omp_target_associate_ptr (const void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__, int) __GOMP_NOTHROW; extern int omp_target_disassociate_ptr (const void *, int) __GOMP_NOTHROW; |