diff options
| author | Andrew Stubbs <ams@codesourcery.com> | 2023-01-30 14:43:00 +0000 |
|---|---|---|
| committer | Andrew Stubbs <ams@codesourcery.com> | 2023-12-06 16:48:57 +0000 |
| commit | e7d6c277fa28c0b9b621d23c471e0388d2912644 (patch) | |
| tree | 3ef9390ef49f8deefa281fd7ad2a145ad85254a6 /libgomp/testsuite | |
| parent | e9a19ead498fcc89186b724c6e76854f7751a89b (diff) | |
| download | gcc-e7d6c277fa28c0b9b621d23c471e0388d2912644.zip gcc-e7d6c277fa28c0b9b621d23c471e0388d2912644.tar.gz gcc-e7d6c277fa28c0b9b621d23c471e0388d2912644.tar.bz2 | |
amdgcn, libgomp: low-latency allocator
This implements the OpenMP low-latency memory allocator for AMD GCN using the
small per-team LDS memory (Local Data Store).
Since addresses can now refer to LDS space, the "Global" address space is
no-longer compatible. This patch therefore switches the backend to use
entirely "Flat" addressing (which supports both memories). A future patch
will re-enable "global" instructions for cases where it is known to be safe
to do so.
gcc/ChangeLog:
* config/gcn/gcn-builtins.def (DISPATCH_PTR): New built-in.
* config/gcn/gcn.cc (gcn_init_machine_status): Disable global
addressing.
(gcn_expand_builtin_1): Implement GCN_BUILTIN_DISPATCH_PTR.
libgomp/ChangeLog:
* config/gcn/libgomp-gcn.h (TEAM_ARENA_START): Move to here.
(TEAM_ARENA_FREE): Likewise.
(TEAM_ARENA_END): Likewise.
(GCN_LOWLAT_HEAP): New.
* config/gcn/team.c (LITTLEENDIAN_CPU): New, and import hsa.h.
(__gcn_lowlat_init): New prototype.
(gomp_gcn_enter_kernel): Initialize the low-latency heap.
* libgomp.h (TEAM_ARENA_START): Move to libgomp.h.
(TEAM_ARENA_FREE): Likewise.
(TEAM_ARENA_END): Likewise.
* plugin/plugin-gcn.c (lowlat_size): New variable.
(print_kernel_dispatch): Label the group_segment_size purpose.
(init_environment_variables): Read GOMP_GCN_LOWLAT_POOL.
(create_kernel_dispatch): Pass low-latency head allocation to kernel.
(run_kernel): Use shadow; don't assume values.
* testsuite/libgomp.c/omp_alloc-traits.c: Enable for amdgcn.
* config/gcn/allocator.c: New file.
* libgomp.texi: Document low-latency implementation details.
Diffstat (limited to 'libgomp/testsuite')
| -rw-r--r-- | libgomp/testsuite/libgomp.c/omp_alloc-traits.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libgomp/testsuite/libgomp.c/omp_alloc-traits.c b/libgomp/testsuite/libgomp.c/omp_alloc-traits.c index 4ff0fca..e9acc86 100644 --- a/libgomp/testsuite/libgomp.c/omp_alloc-traits.c +++ b/libgomp/testsuite/libgomp.c/omp_alloc-traits.c @@ -1,7 +1,7 @@ /* { dg-do run } */ /* { dg-require-effective-target offload_device } */ -/* { dg-xfail-if "not implemented" { ! offload_target_nvptx } } */ +/* { dg-xfail-if "not implemented" { ! { offload_target_nvptx || offload_target_amdgcn } } } */ /* Test that GPU low-latency allocation is limited to team access. */ |