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shader: Implement ISCADD32I

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ReinUsesLisp 2021-05-30 20:46:07 -03:00 committed by ameerj
parent adc43297c5
commit 5d170de0b5
1 changed files with 34 additions and 20 deletions
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54
src/shader_recompiler/frontend/maxwell/translate/impl/integer_scaled_add.cpp
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@ -8,40 +8,36 @@
namespace Shader::Maxwell {
namespace {
void ISCADD(TranslatorVisitor& v, u64 insn, IR::U32 op_b) {
void ISCADD(TranslatorVisitor& v, u64 insn, IR::U32 op_b, bool cc, bool neg_a, bool neg_b,
u64 scale_imm) {
union {
u64 raw;
BitField<0, 8, IR::Reg> dest_reg;
BitField<8, 8, IR::Reg> op_a;
BitField<47, 1, u64> cc;
BitField<48, 2, u64> three_for_po;
BitField<48, 1, u64> neg_b;
BitField<49, 1, u64> neg_a;
BitField<39, 5, u64> scale;
} const iscadd{insn};
const bool po{iscadd.three_for_po == 3};
const bool po{neg_a && neg_b};
IR::U32 op_a{v.X(iscadd.op_a)};
if (!po) {
// When PO is not present, the bits are interpreted as negation
if (iscadd.neg_a != 0) {
op_a = v.ir.INeg(op_a);
}
if (iscadd.neg_b != 0) {
op_b = v.ir.INeg(op_b);
}
} else {
if (po) {
// When PO is present, add one
op_b = v.ir.IAdd(op_b, v.ir.Imm32(1));
} else {
// When PO is not present, the bits are interpreted as negation
if (neg_a) {
op_a = v.ir.INeg(op_a);
}
if (neg_b) {
op_b = v.ir.INeg(op_b);
}
}
// With the operands already processed, scale A
const IR::U32 scale{v.ir.Imm32(static_cast<u32>(iscadd.scale))};
const IR::U32 scale{v.ir.Imm32(static_cast<u32>(scale_imm))};
const IR::U32 scaled_a{v.ir.ShiftLeftLogical(op_a, scale)};
const IR::U32 result{v.ir.IAdd(scaled_a, op_b)};
v.X(iscadd.dest_reg, result);
if (iscadd.cc != 0) {
if (cc) {
v.SetZFlag(v.ir.GetZeroFromOp(result));
v.SetSFlag(v.ir.GetSignFromOp(result));
const IR::U1 carry{v.ir.GetCarryFromOp(result)};
@ -51,6 +47,18 @@ void ISCADD(TranslatorVisitor& v, u64 insn, IR::U32 op_b) {
}
}
void ISCADD(TranslatorVisitor& v, u64 insn, IR::U32 op_b) {
union {
u64 raw;
BitField<47, 1, u64> cc;
BitField<48, 1, u64> neg_b;
BitField<49, 1, u64> neg_a;
BitField<39, 5, u64> scale;
} const iscadd{insn};
ISCADD(v, insn, op_b, iscadd.cc != 0, iscadd.neg_a != 0, iscadd.neg_b != 0, iscadd.scale);
}
} // Anonymous namespace
void TranslatorVisitor::ISCADD_reg(u64 insn) {
@ -65,8 +73,14 @@ void TranslatorVisitor::ISCADD_imm(u64 insn) {
ISCADD(*this, insn, GetImm20(insn));
}
void TranslatorVisitor::ISCADD32I(u64) {
throw NotImplementedException("ISCADD32I");
void TranslatorVisitor::ISCADD32I(u64 insn) {
union {
u64 raw;
BitField<52, 1, u64> cc;
BitField<53, 5, u64> scale;
} const iscadd{insn};
return ISCADD(*this, insn, GetImm32(insn), iscadd.cc != 0, false, false, iscadd.scale);
}
} // namespace Shader::Maxwell