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shader: V_FFBH_I32

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nmzik
2026-08-29 14:03:57 +04:00
parent 618926b124
commit d9ae3ed64c
7 changed files with 57 additions and 6 deletions
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src/graphics/shader/recompiler/frontend/translate/Integer.cpp
+7 -4
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@@ -224,11 +224,14 @@ bool Translator::S_FF1_I32_B64(const Decoder::Instruction& inst) {
return true;
}
bool Translator::V_FFBH_U32(const Decoder::Instruction& inst) {
const auto source = ReadU32(inst.src0);
const auto msb = IR::U32(ir.Emit(IR::ValueOpcode::FindUMsb32, {source}));
bool Translator::V_FFBH_32(const Decoder::Instruction& inst, bool sign) {
const auto source = ReadU32(inst.src0);
const auto value = sign ? ir.BitwiseXor(
source, ir.ShiftRightArithmetic(source, IR::U32(IR::Value(31u))))
: source;
const auto msb = IR::U32(ir.Emit(IR::ValueOpcode::FindUMsb32, {value}));
const auto position = ir.ISub(IR::U32(IR::Value(31u)), msb);
const auto result = ir.Select(ir.INotEqual(source, IR::U32(IR::Value(0u))), position,
const auto result = ir.Select(ir.INotEqual(value, IR::U32(IR::Value(0u))), position,
IR::U32(IR::Value(0xffffffffu)));
WriteOperand(DestinationOperand(inst), result);
return true;