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A64: Implement FABD in terms of existing IR instructions

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Fixes NaN issue. Closes #306.
This commit is contained in:
MerryMage
2018-07-16 16:51:16 +01:00
parent 1dbe9d95e6
commit e18fca17dc
6 changed files with 5 additions and 42 deletions
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9
src/frontend/A64/translate/impl/simd_scalar_three_same.cpp
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@@ -173,12 +173,11 @@ bool TranslatorVisitor::CMTST_1(Imm<2> size, Vec Vm, Vec Vn, Vec Vd) {
bool TranslatorVisitor::FABD_2(bool sz, Vec Vm, Vec Vn, Vec Vd) {
const size_t esize = sz ? 64 : 32;
const IR::U128 operand1 = V(esize, Vn);
const IR::U128 operand2 = V(esize, Vm);
const IR::U128 difference = ir.FPVectorAbsoluteDifference(esize, operand1, operand2);
const IR::U128 result = ir.VectorZeroUpper(difference);
const IR::U32U64 operand1 = V_scalar(esize, Vn);
const IR::U32U64 operand2 = V_scalar(esize, Vm);
const IR::U32U64 result = ir.FPAbs(ir.FPSub(operand1, operand2, true));
V(128, Vd, result);
V_scalar(esize, Vd, result);
return true;
}

2
src/frontend/A64/translate/impl/simd_three_same.cpp
View File

@@ -384,7 +384,7 @@ bool TranslatorVisitor::FABD_4(bool Q, bool sz, Vec Vm, Vec Vn, Vec Vd) {
const IR::U128 operand1 = V(datasize, Vn);
const IR::U128 operand2 = V(datasize, Vm);
const IR::U128 result = ir.FPVectorAbsoluteDifference(esize, operand1, operand2);
const IR::U128 result = ir.FPVectorAbs(esize, ir.FPVectorSub(esize, operand1, operand2));
V(datasize, Vd, result);
return true;