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fp: Remove MantissaT

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This commit is contained in:
MerryMage 2018-07-23 11:52:37 +01:00
parent bda86fd167
commit 805428e35e
6 changed files with 33 additions and 36 deletions
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24
src/common/fp/unpacked.cpp
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@ -14,7 +14,7 @@
namespace Dynarmic::FP {
template<typename FPT>
std::tuple<FPType, bool, FPUnpacked<u64>> FPUnpack(FPT op, FPCR fpcr, FPSR& fpsr) {
std::tuple<FPType, bool, FPUnpacked> FPUnpack(FPT op, FPCR fpcr, FPSR& fpsr) {
constexpr size_t sign_bit = FPInfo<FPT>::exponent_width + FPInfo<FPT>::explicit_mantissa_width;
constexpr size_t exponent_high_bit = FPInfo<FPT>::exponent_width + FPInfo<FPT>::explicit_mantissa_width - 1;
constexpr size_t exponent_low_bit = FPInfo<FPT>::explicit_mantissa_width;
@ -51,21 +51,21 @@ std::tuple<FPType, bool, FPUnpacked<u64>> FPUnpack(FPT op, FPCR fpcr, FPSR& fpsr
return {FPType::Nonzero, sign, {sign, exp, frac}};
}
template std::tuple<FPType, bool, FPUnpacked<u64>> FPUnpack<u32>(u32 op, FPCR fpcr, FPSR& fpsr);
template std::tuple<FPType, bool, FPUnpacked<u64>> FPUnpack<u64>(u64 op, FPCR fpcr, FPSR& fpsr);
template std::tuple<FPType, bool, FPUnpacked> FPUnpack<u32>(u32 op, FPCR fpcr, FPSR& fpsr);
template std::tuple<FPType, bool, FPUnpacked> FPUnpack<u64>(u64 op, FPCR fpcr, FPSR& fpsr);
template<size_t F, typename MantissaT>
std::tuple<bool, int, MantissaT, MantissaT> Normalize(FPUnpacked<MantissaT> op) {
template<size_t F>
std::tuple<bool, int, u64, u64> Normalize(FPUnpacked op) {
const int highest_set_bit = Common::HighestSetBit(op.mantissa);
const int shift_amount = highest_set_bit - static_cast<int>(F);
const MantissaT mantissa = Safe::LogicalShiftRight(op.mantissa, shift_amount);
const MantissaT error = Safe::LogicalShiftRightDouble(op.mantissa, static_cast<MantissaT>(0), shift_amount);
const u64 mantissa = Safe::LogicalShiftRight(op.mantissa, shift_amount);
const u64 error = Safe::LogicalShiftRightDouble(op.mantissa, static_cast<u64>(0), shift_amount);
const int exponent = op.exponent + highest_set_bit;
return std::make_tuple(op.sign, exponent, mantissa, error);
}
template<typename FPT, typename MantissaT>
FPT FPRoundBase(FPUnpacked<MantissaT> op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr) {
template<typename FPT>
FPT FPRoundBase(FPUnpacked op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr) {
ASSERT(op.mantissa != 0);
ASSERT(rounding != RoundingMode::ToNearest_TieAwayFromZero);
@ -94,7 +94,7 @@ FPT FPRoundBase(FPUnpacked<MantissaT> op, FPCR fpcr, RoundingMode rounding, FPSR
bool round_up = false, overflow_to_inf = false;
switch (rounding) {
case RoundingMode::ToNearest_TieEven: {
constexpr MantissaT half = static_cast<MantissaT>(1) << (Common::BitSize<MantissaT>() - 1);
constexpr u64 half = static_cast<u64>(1) << (Common::BitSize<u64>() - 1);
round_up = (error > half) || (error == half && Common::Bit<0>(mantissa));
overflow_to_inf = true;
break;
@ -175,7 +175,7 @@ FPT FPRoundBase(FPUnpacked<MantissaT> op, FPCR fpcr, RoundingMode rounding, FPSR
return result;
}
template u32 FPRoundBase<u32, u64>(FPUnpacked<u64> op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr);
template u64 FPRoundBase<u64, u64>(FPUnpacked<u64> 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);
} // namespace Dynarmic::FP