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AMDGPU: Handle gfx950 XDL-write-overlapped-smfma-src-c wait state change #117263

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Merged
merged 1 commit into from
Nov 23, 2024
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AMDGPU: Handle gfx950 XDL-write-overlapped-smfma-src-c wait state change #117263

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16 changes: 9 additions & 7 deletions llvm/lib/Target/AMDGPU/GCNHazardRecognizer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2232,12 +2232,14 @@ int GCNHazardRecognizer::checkMAIHazards908(MachineInstr *MI) {
}

static int
GFX940_XDL_N_PassWritesVGPROverlappedSMFMASrcCWaitStates(int NumPasses) {
// 2 pass -> 3
// 4 pass -> 5
// 8 pass -> 9
// 16 pass -> 17
return NumPasses + 1;
GFX940_XDL_N_PassWritesVGPROverlappedSMFMASrcCWaitStates(int NumPasses,
bool IsGFX950) {
// xdl def cycles | gfx940 | gfx950
// 2 pass | 3 4
// 4 pass | 5 6
// 8 pass | 9 10
// 16 pass | 17 18
return NumPasses + 1 + IsGFX950;
}

static int
Expand Down Expand Up @@ -2373,7 +2375,7 @@ int GCNHazardRecognizer::checkMAIHazards90A(MachineInstr *MI) {
NeedWaitStates =
isXDL(ST, *MI1)
? GFX940_XDL_N_PassWritesVGPROverlappedSMFMASrcCWaitStates(
NumPasses)
NumPasses, ST.hasGFX950Insts())
: GFX940_SMFMA_N_PassWritesVGPROverlappedSMFMASrcCWaitStates(
NumPasses);
break;
Expand Down
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