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refactor(shader): compact whole-quad mask lowering

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This commit is contained in:
nmzik
2026-08-19 08:21:18 +02:00
parent 5383972e96
commit c9e942a972
9 changed files with 186 additions and 57 deletions
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src/graphics/shader/recompiler/ir/passes/ConstantPropagation.cpp
+15
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@@ -357,6 +357,21 @@ void FoldInstruction(Inst& inst) {
ReplaceBinaryIdentity(inst, Type::U64, 1u);
}
return;
case ValueOpcode::WqmU64: {
const auto value = Arg(inst, 0);
if (IsImmediate(value, Type::U64)) {
const auto expand = [](uint32_t word) {
auto quads = word | (word >> 1u);
quads |= quads >> 2u;
return (quads & 0x11111111u) * 0x0fu;
};
const auto low = expand(static_cast<uint32_t>(value.U64()));
const auto high = expand(static_cast<uint32_t>(value.U64() >> 32u));
Replace(inst, Value(static_cast<uint64_t>(low) |
(static_cast<uint64_t>(high) << 32u)));
}
return;
}
case ValueOpcode::UDiv32: {
const auto rhs = Arg(inst, 1);
if (IsImmediate(rhs, Type::U32) && rhs.U32() == 1u) {