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Merge pull request #442 from lioncash/fcvtxn

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A64: Implement scalar and vector variants of FCVTXN
This commit is contained in:
Merry 2019-03-06 20:27:59 +00:00 • committed by MerryMage
commit fb039e232c
14 changed files with 210 additions and 32 deletions
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26
src/frontend/A64/translate/impl/simd_two_register_misc.cpp
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@ -348,10 +348,11 @@ bool TranslatorVisitor::FCVTL(bool Q, bool sz, Vec Vn, Vec Vd) {
}
const IR::U128 part = Vpart(64, Vn, Q);
const auto rounding_mode = ir.current_location->FPCR().RMode();
IR::U128 result = ir.ZeroVector();
for (size_t i = 0; i < 2; i++) {
const IR::U64 element = ir.FPSingleToDouble(ir.VectorGetElement(32, part, i), true);
const IR::U64 element = ir.FPSingleToDouble(ir.VectorGetElement(32, part, i), rounding_mode);
result = ir.VectorSetElement(64, result, i, element);
}
@ -367,10 +368,11 @@ bool TranslatorVisitor::FCVTN(bool Q, bool sz, Vec Vn, Vec Vd) {
}
const IR::U128 operand = V(128, Vn);
const auto rounding_mode = ir.current_location->FPCR().RMode();
IR::U128 result = ir.ZeroVector();
for (size_t i = 0; i < 2; i++) {
const IR::U32 element = ir.FPDoubleToSingle(ir.VectorGetElement(64, operand, i), true);
const IR::U32 element = ir.FPDoubleToSingle(ir.VectorGetElement(64, operand, i), rounding_mode);
result = ir.VectorSetElement(32, result, i, element);
}
@ -395,6 +397,26 @@ bool TranslatorVisitor::FCVTPS_4(bool Q, bool sz, Vec Vn, Vec Vd) {
return FloatConvertToInteger(*this, Q, sz, Vn, Vd, Signedness::Signed, FP::RoundingMode::TowardsPlusInfinity);
}
bool TranslatorVisitor::FCVTXN_2(bool Q, bool sz, Vec Vn, Vec Vd) {
if (!sz) {
return UnallocatedEncoding();
}
const size_t part = Q ? 1 : 0;
const auto operand = ir.GetQ(Vn);
auto result = ir.ZeroVector();
for (size_t e = 0; e < 2; ++e) {
const IR::U64 element = ir.VectorGetElement(64, operand, e);
const IR::U32 converted = ir.FPDoubleToSingle(element, FP::RoundingMode::ToOdd);
result = ir.VectorSetElement(32, result, e, converted);
}
Vpart(64, Vd, part, result);
return true;
}
bool TranslatorVisitor::FCVTZS_int_4(bool Q, bool sz, Vec Vn, Vec Vd) {
return FloatConvertToInteger(*this, Q, sz, Vn, Vd, Signedness::Signed, FP::RoundingMode::TowardsZero);
}