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shader: compute add-with-carry with compares and remove IAddCarry32

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nmzik committed 2026-10-21 22:28:11 +02:00
1 parent c571d8ed5a
commit 6e5167598e
8 files changed
+17 -50
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src/graphics/shader/recompiler/ir/passes/ConstantPropagation.cpp
-11
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@@ -244,17 +244,6 @@ bool FoldCompositeExtract(Inst& inst, ValueOpcode construct, size_t components)
Replace(inst, producer->Arg(component));
return true;
}
if (component < 2u && producer != nullptr &&
producer->GetOpcode() == ValueOpcode::IAddCarry32) {
const auto lhs = producer->Arg(0).Resolve();
const auto rhs = producer->Arg(1).Resolve();
if (IsImmediate(lhs, Type::U32) && IsImmediate(rhs, Type::U32)) {
const auto sum = static_cast<uint64_t>(lhs.U32()) + rhs.U32();
Replace(inst, Value(component == 0u ? static_cast<uint32_t>(sum)
: static_cast<uint32_t>(sum >> 32u)));
return true;
}
}
return false;
}