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Merge pull request #638 from khasinski/fix/f32-omod-exponent-scale

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fix(shader): apply f32 output modifiers on the exponent bits
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Dean authored and GitHub committed 2026-10-06 13:26:56 +13:00
2 parents bd8aa57775 8a8c0290d6
commit 489fcdca7e
1 file changed
+7 -10
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core/shader/recompiler/Translation/src/TranslationContext/OperandAccess.cpp
+7 -10
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@@ -257,21 +257,18 @@ IrU32 TranslationContext::applyBitSourceModifiers(const RdnaOperand& operand, Ir
IrF32 TranslationContext::applyF32ResultModifiers(const RdnaOperand& operand, IrF32 value) {
if (operand.omod != 0u) {
float multiplier = 0.5f;
switch (operand.omod) {
case 1u: multiplier = 2.0f; break;
case 2u: multiplier = 4.0f; break;
default: break;
}
const IrF32 scaled(ir.Emit(IrOpcode::FPMul32, IrType::F32, {&value.Value(), &ir.ConstantF32(multiplier)}));
IrValue& bits = ir.BitCastU32(value.Value());
IrValue& magnitude = ir.BitwiseAnd(bits, ir.Constant(0x7fffffffu));
IrValue* result = &ir.BitCastU32(scaled.Value());
IrValue& sign = ir.BitwiseAnd(bits, ir.Constant(0x80000000u));
IrValue* result = nullptr;
if (operand.omod == 3u) {
result = &ir.Select(ir.ULessThan(magnitude, ir.Constant(0x01000000u)), ir.BitwiseAnd(bits, ir.Constant(0x80000000u)), *result);
result = &ir.Select(ir.ULessThan(magnitude, ir.Constant(0x01000000u)), sign, ir.ISub(bits, ir.Constant(0x00800000u)));
} else {
const std::uint32_t exponentStep = operand.omod == 1u ? 0x00800000u : 0x01000000u;
result = &ir.Select(ir.ULessThan(magnitude, ir.Constant(0x7f800000u - exponentStep)), ir.IAdd(bits, ir.Constant(exponentStep)), ir.BitwiseOr(sign, ir.Constant(0x7f800000u)));
}
result = &ir.Select(ir.ULessThan(magnitude, ir.Constant(0x00800000u)), ir.Constant(0u), *result);
result = &ir.Select(ir.UGreaterThan(magnitude, ir.Constant(0x7f800000u)), bits, *result);
result = &ir.Select(ir.UGreaterThan(magnitude, ir.Constant(0x7f7fffffu)), bits, *result);
value = IrF32(ir.BitCastF32(*result));
}
if (operand.clamp) {