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Diffstat (limited to 'src/amd/compiler/README')
| -rw-r--r-- | src/amd/compiler/README | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/amd/compiler/README b/src/amd/compiler/README index d3ecc896bc4..79674ebe0db 100644 --- a/src/amd/compiler/README +++ b/src/amd/compiler/README @@ -181,3 +181,13 @@ Any permlane instruction that follows any VOPC instruction. Confirmed by AMD devs that despite the name, this doesn't only affect v_cmpx. Mitigated by: any VALU instruction except `v_nop`. + +### VcmpxExecWARHazard + +Triggered by: +Any non-VALU instruction reads the EXEC mask. Then, any VALU instruction writes the EXEC mask. + +Mitigated by: +A VALU instruction that writes an SGPR (or has a valid SDST operand), or `s_waitcnt_depctr 0xfffe`. +Note: `s_waitcnt_depctr` is an internal instruction, so there is no further information +about what it does or what its operand means. |