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Share median classifications and preserve RDNA2 signed-zero selection

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nmzik
2026-10-19 00:59:31 +02:00
parent 75d7a4311d
commit defb2f11d3
3 changed files with 88 additions and 40 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterAlu.cpp
-13
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@@ -160,19 +160,6 @@ uint32_t EmitFPMad32(EmitterState& state, uint32_t a, uint32_t b, uint32_t c) {
return sum;
}
uint32_t EmitFPMedTri32(EmitterState& state, uint32_t a, uint32_t b, uint32_t c) {
const auto min_ab = EmitMinMaxF32Value(state, a, b, false);
const auto min3 = EmitMinMaxF32Value(state, min_ab, c, false);
const auto max_ab = EmitMinMaxF32Value(state, a, b, true);
const auto high_min = EmitMinMaxF32Value(state, max_ab, c, false);
const auto median = EmitMinMaxF32Value(state, min_ab, high_min, true);
const auto nan_ab = Binary(state, spv::OpLogicalOr, TypeBool(state),
EmitClassifyF32(state, a).nan, EmitClassifyF32(state, b).nan);
const auto any_nan =
Binary(state, spv::OpLogicalOr, TypeBool(state), nan_ab, EmitClassifyF32(state, c).nan);
return Select(state, TypeF32(state), any_nan, min3, median);
}
uint32_t EmitFindUMsb64(EmitterState& state, uint32_t value) {
// GLSL FindUMsb is restricted to 32-bit components.
const auto unpacked = Unary(state, spv::OpBitcast, TypeU32Vector(state, 2), value);