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| author | Julian Brown <julian@codesourcery.com> | 2020-02-10 12:26:57 -0800 |
|---|---|---|
| committer | Julian Brown <julian@codesourcery.com> | 2020-09-08 13:26:42 -0700 |
| commit | e929d65b48ad5583e995d872ca5de95b23de4d72 (patch) | |
| tree | 653ba525d9caf52a579a85f2e5e929cf36307744 /libgomp | |
| parent | 3aee3aaf48be2d3d81e381690ae9dd305d8b505f (diff) | |
| download | gcc-e929d65b48ad5583e995d872ca5de95b23de4d72.zip gcc-e929d65b48ad5583e995d872ca5de95b23de4d72.tar.gz gcc-e929d65b48ad5583e995d872ca5de95b23de4d72.tar.bz2 | |
amdgcn: Add waitcnt after LDS write instructions
Data-share write (ds_write) instructions do not necessarily complete
the write to LDS immediately. When a write completes, LGKM_CNT is
decremented. For now, we wait until LGKM_CNT reaches zero after each
ds_write instruction.
This fixes a race condition in the case where LDS is read immediately
after being written. This can happen with broadcast operations.
2020-09-08 Julian Brown <julian@codesourcery.com>
gcc/
* config/gcn/gcn-valu.md (scatter<mode>_insn_1offset_ds<exec_scatter>):
Add waitcnt.
* config/gcn/gcn.md (*mov<mode>_insn, *movti_insn): Add waitcnt to
ds_write alternatives.
Diffstat (limited to 'libgomp')
0 files changed, 0 insertions, 0 deletions