Christudasan Devadasan 08b8d467d4 [AMDGPU][GFX1250] Insert S_WAIT_XCNT for SMEM and VMEM load-stores (#145566) ...

This patch tracks the register operands of both VMEM (FLAT, MUBUF,
MTBUF) and SMEM load-store operations and inserts a S_WAIT_XCNT
instruction with sufficient wait-count before potentially redefining
them. For VMEM instructions, XNACK is returned in the same order as
they were issued and hence non-zero counter values can be inserted.
However, SMEM execution is out-of-order and so is their XNACK reception.
Thus, only zero counter value can be inserted to capture SMEM dependencies.

2025-06-25 10:40:36 +05:30

102 KiB

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