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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/SrtWalker.cpp
+1 -16
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@@ -134,7 +134,6 @@ bool IsRuntimeUniformOp(ValueOpcode op) {
case ValueOpcode::BitFieldSExtract:
case ValueOpcode::IAdd32:
case ValueOpcode::IAdd64:
case ValueOpcode::IAddCarry32:
case ValueOpcode::ISub32:
case ValueOpcode::ISub64:
case ValueOpcode::IMul32:
@@ -338,9 +337,7 @@ private:
const auto* source = inst->NumArgs() == 2 ? inst->Arg(0).ResolveInstruction() : nullptr;
const auto index = inst->NumArgs() == 2 ? inst->Arg(1).Resolve() : Value {};
if (source == nullptr || !index.IsImmediate() || index.GetType() != Type::U32 ||
index.U32() >= 2u ||
(source->GetOpcode() != ValueOpcode::CompositeConstructU32x2 &&
source->GetOpcode() != ValueOpcode::IAddCarry32)) {
index.U32() >= 2u || source->GetOpcode() != ValueOpcode::CompositeConstructU32x2) {
return finish(false);
}
}
@@ -653,18 +650,6 @@ bool SrtWalker::EvaluateExtract(const Inst& inst, uint64_t& result) {
if (source->GetOpcode() == ValueOpcode::CompositeConstructU32x2) {
return EvaluateWide(source->Arg(component), result);
}
if (source->GetOpcode() == ValueOpcode::IAddCarry32) {
uint64_t lhs = 0;
uint64_t rhs = 0;
if (!Arg(*source, 0, lhs) || !Arg(*source, 1, rhs)) {
return false;
}
const auto sum =
static_cast<uint64_t>(static_cast<uint32_t>(lhs)) + static_cast<uint32_t>(rhs);
result =
component == 0u ? static_cast<uint32_t>(sum) : static_cast<uint32_t>(sum >> 32u);
return true;
}
return false;
}