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IR: Implement FPRoundInt

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This commit is contained in:
MerryMage 2018-07-16 13:49:15 +01:00
parent e24054f4d7
commit b228694012
5 changed files with 67 additions and 2 deletions
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6
src/common/fp/op/FPRoundInt.cpp
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@ -43,7 +43,7 @@ u64 FPRoundInt(FPT op, FPCR fpcr, RoundingMode rounding, bool exact, FPSR& fpsr)
return op;
}
u64 int_result = value.mantissa;
u64 int_result = sign ? Safe::Negate<u64>(value.mantissa) : static_cast<u64>(value.mantissa);
const ResidualError error = ResidualErrorOnRightShift(int_result, -value.exponent);
int_result = Safe::ArithmeticShiftLeft(int_result, value.exponent);
@ -72,9 +72,11 @@ u64 FPRoundInt(FPT op, FPCR fpcr, RoundingMode rounding, bool exact, FPSR& fpsr)
int_result++;
}
const u64 abs_int_result = Common::MostSignificantBit(int_result) ? Safe::Negate<u64>(int_result) : static_cast<u64>(int_result);
const FPT result = int_result == 0
? FPInfo<FPT>::Zero(sign)
: FPRound<FPT>(FPUnpacked<u64>{sign, 0, int_result}, fpcr, RoundingMode::TowardsZero, fpsr);
: FPRound<FPT>(FPUnpacked<u64>{sign, 0, abs_int_result}, fpcr, RoundingMode::TowardsZero, fpsr);
if (error != ResidualError::Zero && exact) {
FPProcessException(FPExc::Inexact, fpcr, fpsr);