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shader: align float semantics with RDNA2 default mode

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This commit is contained in:
nmzik
2026-08-22 03:16:45 +02:00
parent a2baaccc6e
commit 9241fdc32a
4 changed files with 22 additions and 22 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterAluHelpers.cpp
+3 -12
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@@ -223,12 +223,8 @@ F32Class EmitClassifyF32(EmitterState& state, uint32_t value) {
const auto mantissa_bits = EmitAndConstant(state, abs_bits, 0x007fffffu);
const auto exponent_max = EmitCompareU32Constant(state, OpIEqual, exponent_bits, 0x7f800000u);
const auto mantissa_nonzero = EmitCompareU32Constant(state, OpINotEqual, mantissa_bits, 0);
const auto quiet_bit_clear =
EmitCompareU32Constant(state, OpIEqual, EmitAndConstant(state, cls.bits, 0x00400000u), 0);
cls.nan = EmitLogicalAndBool(state, exponent_max, mantissa_nonzero);
cls.snan = EmitLogicalAndBool(state, cls.nan, quiet_bit_clear);
cls.zero = EmitCompareU32Constant(state, OpIEqual, abs_bits, 0);
cls.quiet_bits = EmitOrU32(state, cls.bits, ConstantU32(state, 0x00400000u));
cls.nan = EmitLogicalAndBool(state, exponent_max, mantissa_nonzero);
cls.zero = EmitCompareU32Constant(state, OpIEqual, abs_bits, 0);
return cls;
}
@@ -308,12 +304,7 @@ uint32_t EmitMinMaxF32Value(EmitterState& state, uint32_t lhs, uint32_t rhs, boo
const auto rhs_nan_bits =
EmitSelectValueU32(state, rhs_class.nan, lhs_class.bits, numeric_bits);
const auto non_snan_bits =
EmitSelectValueU32(state, lhs_class.nan, rhs_class.bits, rhs_nan_bits);
const auto rhs_snan_bits =
EmitSelectValueU32(state, rhs_class.snan, rhs_class.quiet_bits, non_snan_bits);
const auto result_bits =
EmitSelectValueU32(state, lhs_class.snan, lhs_class.quiet_bits, rhs_snan_bits);
const auto result_bits = EmitSelectValueU32(state, lhs_class.nan, rhs_class.bits, rhs_nan_bits);
return EmitBitcastU32ToF32(state, result_bits);
}