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shader: fix crash from packed ancillary used as DPP old operand (#1769)

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shader: emit plain EXEC selects for DPP writes that reach every active lane (Street Fighter 6)
This commit is contained in:
Felipe
2026-10-23 04:51:32 -03:00
committed by GitHub
parent 719c44310a
commit 9dcff95e80
3 changed files with 19 additions and 2 deletions
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src/graphics/shader/recompiler/frontend/translate/Translate.cpp
+4 -1
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@@ -319,7 +319,10 @@ void Translator::WriteRawU32(const Decoder::Operand& operand, IR::U32 value) {
case Decoder::OperandKind::Vgpr: {
const auto reg = static_cast<IR::VectorReg>(operand.reg);
const auto old = ir.GetVectorReg(reg);
if (operand.dpp) {
// DPP skips EXEC lanes only through row/bank masks, or for invalid sources without
// BOUND_CTRL (dpp8 reads zero); otherwise it is a plain masked write.
if (operand.dpp && (operand.dpp_row_mask != 0xfu || operand.dpp_bank_mask != 0xfu ||
(!operand.dpp_bound_ctrl && !operand.dpp8))) {
value = IR::U32(ir.Emit(IR::ValueOpcode::DppUpdateU32, {value, old, ir.GetExec()},
DppFlags(operand)));
} else {