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common/fp/op/FPRSqrtStepFused: Add half-precision specialization for FPRSqrtStepFused

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Lioncash 2019-04-14 20:51:58 -04:00 committed by MerryMage
parent 45864133f5
commit e3b2eb57b5
1 changed files with 6 additions and 5 deletions
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9
src/common/fp/op/FPRSqrtStepFused.cpp
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@ -19,8 +19,8 @@ template<typename FPT>
FPT FPRSqrtStepFused(FPT op1, FPT op2, FPCR fpcr, FPSR& fpsr) { FPT FPRSqrtStepFused(FPT op1, FPT op2, FPCR fpcr, FPSR& fpsr) {
op1 = FPNeg(op1); op1 = FPNeg(op1);
const auto [type1, sign1, value1] = FPUnpack<FPT>(op1, fpcr, fpsr); const auto [type1, sign1, value1] = FPUnpack(op1, fpcr, fpsr);
const auto [type2, sign2, value2] = FPUnpack<FPT>(op2, fpcr, fpsr); const auto [type2, sign2, value2] = FPUnpack(op2, fpcr, fpsr);
if (const auto maybe_nan = FPProcessNaNs(type1, type2, op1, op2, fpcr, fpsr)) { if (const auto maybe_nan = FPProcessNaNs(type1, type2, op1, op2, fpcr, fpsr)) {
return *maybe_nan; return *maybe_nan;
@ -37,7 +37,7 @@ FPT FPRSqrtStepFused(FPT op1, FPT op2, FPCR fpcr, FPSR& fpsr) {
} }
if (inf1 || inf2) { if (inf1 || inf2) {
return FPInfo<FPT>::Infinity(sign1 != sign2); return FPT(FPInfo<FPT>::Infinity(sign1 != sign2));
} }
// result_value = (3.0 + (value1 * value2)) / 2.0 // result_value = (3.0 + (value1 * value2)) / 2.0
@ -45,11 +45,12 @@ FPT FPRSqrtStepFused(FPT op1, FPT op2, FPCR fpcr, FPSR& fpsr) {
result_value.exponent--; result_value.exponent--;
if (result_value.mantissa == 0) { if (result_value.mantissa == 0) {
return FPInfo<FPT>::Zero(fpcr.RMode() == RoundingMode::TowardsMinusInfinity); return FPT(FPInfo<FPT>::Zero(fpcr.RMode() == RoundingMode::TowardsMinusInfinity));
} }
return FPRound<FPT>(result_value, fpcr, fpsr); return FPRound<FPT>(result_value, fpcr, fpsr);
} }
template u16 FPRSqrtStepFused<u16>(u16 op1, u16 op2, FPCR fpcr, FPSR& fpsr);
template u32 FPRSqrtStepFused<u32>(u32 op1, u32 op2, FPCR fpcr, FPSR& fpsr); template u32 FPRSqrtStepFused<u32>(u32 op1, u32 op2, FPCR fpcr, FPSR& fpsr);
template u64 FPRSqrtStepFused<u64>(u64 op1, u64 op2, FPCR fpcr, FPSR& fpsr); template u64 FPRSqrtStepFused<u64>(u64 op1, u64 op2, FPCR fpcr, FPSR& fpsr);