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shader: fix packed integer negation

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Co-authored-by: shadowbeat070 <70843316+shadowbeat070@users.noreply.github.com>
This commit is contained in:
nmzik
2026-09-18 02:30:46 +04:00
parent bfc8cd0e0b
commit 95d3d9d3ad
4 changed files with 43 additions and 8 deletions
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src/graphics/shader/recompiler/frontend/translate/Translate.cpp
+3 -5
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@@ -541,10 +541,7 @@ IR::U32 Translator::ReadU16LaneRaw(const Decoder::Operand& operand, bool high_la
IR::U32 Translator::ReadU16LaneAsU32(const Decoder::Operand& operand, bool high_lane,
bool sign_extend) {
auto value = ReadU16LaneRaw(operand, high_lane);
if (high_lane ? operand.negate_hi : operand.negate) {
value = ir.BitwiseAnd(ir.ISub(IR::U32(IR::Value(0u)), value), IR::U32(IR::Value(0xffffu)));
}
auto value = Read16LaneBits(operand, high_lane);
if (sign_extend || operand.sdwa_sext) {
value = IR::U32(
ir.Emit(IR::ValueOpcode::BitFieldSExtract, {value, IR::Value(0u), IR::Value(16u)}));
@@ -556,12 +553,13 @@ IR::U32 Translator::ReadU16AsU32(const Decoder::Operand& operand, bool sign_exte
return ReadU16LaneAsU32(operand, false, sign_extend);
}
IR::U32 Translator::ReadF16LaneBits(const Decoder::Operand& operand, bool high_lane) {
IR::U32 Translator::Read16LaneBits(const Decoder::Operand& operand, bool high_lane) {
auto value = ReadU16LaneRaw(operand, high_lane);
if (operand.absolute) {
value = ir.BitwiseAnd(value, IR::U32(IR::Value(0x7fffu)));
}
if (high_lane ? operand.negate_hi : operand.negate) {
// RDNA2 source NEG flips the sign bit, including packed integer operands.
value = ir.BitwiseXor(value, IR::U32(IR::Value(0x8000u)));
}
return value;