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simd_three_same: Use VectorSaturated{Signed,Unsigned}{Add,Sub} in SaturatingArithmeticOperation

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MerryMage 2020-05-30 15:22:53 +01:00
parent 4e90754873
commit 174fbb74c5
1 changed files with 13 additions and 21 deletions
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34
src/frontend/A64/translate/impl/simd_three_same.cpp
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@ -331,37 +331,29 @@ bool SaturatingArithmeticOperation(TranslatorVisitor& v, bool Q, Imm<2> size, Ve
const size_t esize = 8 << size.ZeroExtend();
const size_t datasize = Q ? 128 : 64;
const size_t elements = datasize / esize;
const IR::U128 operand1 = v.V(datasize, Vn);
const IR::U128 operand2 = v.V(datasize, Vm);
IR::U128 result = v.ir.ZeroVector();
for (size_t i = 0; i < elements; i++) {
const IR::UAny op1_elem = v.ir.VectorGetElement(esize, operand1, i);
const IR::UAny op2_elem = v.ir.VectorGetElement(esize, operand2, i);
const auto result_elem = [&] {
if (sign == Signedness::Signed) {
if (op == Operation::Add) {
return v.ir.SignedSaturatedAdd(op1_elem, op2_elem);
}
return v.ir.SignedSaturatedSub(op1_elem, op2_elem);
}
const auto result = [&] {
if (sign == Signedness::Signed) {
if (op == Operation::Add) {
return v.ir.UnsignedSaturatedAdd(op1_elem, op2_elem);
return v.ir.VectorSignedSaturatedAdd(esize, operand1, operand2);
}
return v.ir.UnsignedSaturatedSub(op1_elem, op2_elem);
}();
return v.ir.VectorSignedSaturatedSub(esize, operand1, operand2);
}
v.ir.OrQC(result_elem.overflow);
if (op == Operation::Add) {
return v.ir.VectorUnsignedSaturatedAdd(esize, operand1, operand2);
}
result = v.ir.VectorSetElement(esize, result, i, result_elem.result);
}
return v.ir.VectorUnsignedSaturatedSub(esize, operand1, operand2);
}();
v.V(datasize, Vd, result);
v.ir.OrQC(result.overflow);
v.V(datasize, Vd, result.result);
return true;
}