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shader_recompiler: Implement S_SUBB_U32 instruction (#2796)

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* add S_SUBB_U32 instruction

* add missing case

* move case to match enum
This commit is contained in:
Fire Cube 2025-04-16 23:24:18 +02:00 • committed by GitHub
parent ddf3df7f56
commit aa8dab5371
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2 changed files with 14 additions and 0 deletions
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13
src/shader_recompiler/frontend/translate/scalar_alu.cpp
View file

@ -30,6 +30,8 @@ void Translator::EmitScalarAlu(const GcnInst& inst) {
return S_SUB_I32(inst);
case Opcode::S_ADDC_U32:
return S_ADDC_U32(inst);
case Opcode::S_SUBB_U32:
return S_SUBB_U32(inst);
case Opcode::S_MIN_I32:
return S_MIN_U32(true, inst);
case Opcode::S_MIN_U32:
@ -238,6 +240,17 @@ void Translator::S_SUB_U32(const GcnInst& inst) {
ir.SetScc(ir.IGreaterThan(src1, src0, false));
}
void Translator::S_SUBB_U32(const GcnInst& inst) {
const IR::U32 src0{GetSrc(inst.src[0])};
const IR::U32 src1{GetSrc(inst.src[1])};
const IR::U32 borrow{ir.Select(ir.GetScc(), ir.Imm32(1U), ir.Imm32(0U))};
const IR::U32 result{ir.ISub(ir.ISub(src0, src1), borrow)};
SetDst(inst.dst[0], result);
const IR::U32 sum_with_borrow{ir.IAdd(src1, borrow)};
ir.SetScc(ir.ILessThan(src0, sum_with_borrow, false));
}
void Translator::S_ADD_I32(const GcnInst& inst) {
const IR::U32 src0{GetSrc(inst.src[0])};
const IR::U32 src1{GetSrc(inst.src[1])};

1
src/shader_recompiler/frontend/translate/translate.h
View file

@ -80,6 +80,7 @@ public:
// SOP2
void S_ADD_U32(const GcnInst& inst);
void S_SUB_U32(const GcnInst& inst);
void S_SUBB_U32(const GcnInst& inst);
void S_ADD_I32(const GcnInst& inst);
void S_SUB_I32(const GcnInst& inst);
void S_ADDC_U32(const GcnInst& inst);