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common/fp/unpacked: Add half-precision instantiation of FPRoundBase

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Lioncash 2019-03-09 01:23:27 -05:00 committed by MerryMage
parent 7e814de445
commit 14f55d7476
1 changed files with 5 additions and 4 deletions
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9
src/common/fp/unpacked.cpp
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@ -88,7 +88,7 @@ FPT FPRoundBase(FPUnpacked op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr) {
if (((!isFP16 && fpcr.FZ()) || (isFP16 && fpcr.FZ16())) && exponent < minimum_exp) {
fpsr.UFC(true);
return FPInfo<FPT>::Zero(sign);
return FPT(FPInfo<FPT>::Zero(sign));
}
int biased_exp = std::max<int>(exponent - minimum_exp + 1, 0);
@ -151,13 +151,13 @@ FPT FPRoundBase(FPUnpacked op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr) {
#endif
constexpr int max_biased_exp = (1 << E) - 1;
if (biased_exp >= max_biased_exp) {
result = overflow_to_inf ? FPInfo<FPT>::Infinity(sign) : FPInfo<FPT>::MaxNormal(sign);
result = overflow_to_inf ? FPT(FPInfo<FPT>::Infinity(sign)) : FPT(FPInfo<FPT>::MaxNormal(sign));
FPProcessException(FPExc::Overflow, fpcr, fpsr);
FPProcessException(FPExc::Inexact, fpcr, fpsr);
} else {
result = sign ? 1 : 0;
result <<= E;
result += biased_exp;
result += FPT(biased_exp);
result <<= F;
result |= static_cast<FPT>(mantissa) & FPInfo<FPT>::mantissa_mask;
if (error != ResidualError::Zero) {
@ -172,7 +172,7 @@ FPT FPRoundBase(FPUnpacked op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr) {
} else {
result = sign ? 1 : 0;
result <<= E;
result += biased_exp;
result += FPT(biased_exp);
result <<= F;
result |= static_cast<FPT>(mantissa) & FPInfo<FPT>::mantissa_mask;
if (error != ResidualError::Zero) {
@ -183,6 +183,7 @@ FPT FPRoundBase(FPUnpacked op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr) {
return result;
}
template u16 FPRoundBase<u16>(FPUnpacked op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr);
template u32 FPRoundBase<u32>(FPUnpacked op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr);
template u64 FPRoundBase<u64>(FPUnpacked op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr);