float16_t float16_t::remainder(float16_t denominator) const {
llvm::APFloat result = toLLVMAPF(*this);
llvm::APFloat rhsAPF = toLLVMAPF(denominator);
// FIXME: Ignoring possible exceptions
result.remainder(rhsAPF);
return toFP16(result);
}
float16_t float16_t::divide(float16_t denominator, RoundingMode roundingMode) const {
llvm::APFloat result = toLLVMAPF(*this);
llvm::APFloat rhsAPF = toLLVMAPF(denominator);
// FIXME: Ignoring possible exceptions
result.divide(rhsAPF, getLLVMAPFRoundingMode(roundingMode));
return toFP16(result);
}
float16_t float16_t::multiply(float16_t rhs, RoundingMode roundingMode) const {
llvm::APFloat result = toLLVMAPF(*this);
llvm::APFloat rhsAPF = toLLVMAPF(rhs);
// FIXME: Ignoring possible exceptions
result.multiply(rhsAPF, getLLVMAPFRoundingMode(roundingMode));
return toFP16(result);
}
float16_t float16_t::mod(float16_t denominator, RoundingMode roundingMode) const {
llvm::APFloat result = toLLVMAPF(*this);
llvm::APFloat rhsAPF = toLLVMAPF(denominator);
// FIXME: Ignoring possible exceptions
// LLVM removed the rounding mode as the operation is always exact.
// TODO: change float16_t::mod to no take a rounding mode.
result.mod(rhsAPF);
return toFP16(result);
}
float16_t::operator double() const {
llvm::APFloat convertedValue = toLLVMAPF(*this);
bool losesInfo = false;
// Converting to a more precise type so the rounding mode does not matter, so
// just pick any.
convertedValue.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven, &losesInfo);
internal_assert(!losesInfo) << "Unexpected information loss\n";
return convertedValue.convertToDouble();
}
std::string float16_t::to_hex_string() const {
// Expected format of result: [-]0xh.hhhp[+-]dd
// at most 12 characters are needed for half precision
// + 1 for null terminator
char buffer[13];
llvm::APFloat repr = toLLVMAPF(*this);
// The rounding mode does not matter here when we set hexDigits to 0 which
// will give the precise representation. So any rounding mode will do.
unsigned count = repr.convertToHexString(buffer,
/*hexDigits=*/0,
/*upperCase=*/false,
llvm::APFloat::rmNearestTiesToEven);
internal_assert(count < sizeof(buffer) / sizeof(char)) << "Incorrect buffer size\n";
std::string result(buffer);
return result;
}
bool float16_t::is_zero() const {
llvm::APFloat repr = toLLVMAPF(*this);
return repr.isZero();
}
bool float16_t::is_negative() const {
llvm::APFloat repr = toLLVMAPF(*this);
return repr.isNegative();
}
bool float16_t::is_infinity() const {
llvm::APFloat repr = toLLVMAPF(*this);
return repr.isInfinity();
}
bool float16_t::is_nan() const {
llvm::APFloat repr = toLLVMAPF(*this);
return repr.isNaN();
}
std::string float16_t::to_decimal_string(unsigned int significantDigits) const {
llvm::APFloat repr = toLLVMAPF(*this);
llvm::SmallVector<char, 16> result;
repr.toString(result, /*FormatPrecision=*/significantDigits, /*FormatMaxPadding=*/0);
return std::string(result.begin(), result.end());
}
bool float16_t::are_unordered(float16_t rhs) const {
llvm::APFloat lhsAPF = toLLVMAPF(*this);
llvm::APFloat rhsAPF = toLLVMAPF(rhs);
return lhsAPF.compare(rhsAPF) == llvm::APFloat::cmpUnordered;
}
bool float16_t::operator<(float16_t rhs) const {
internal_assert(!this->are_unordered(rhs)) << "Cannot compare unorderable values\n";
llvm::APFloat lhsAPF = toLLVMAPF(*this);
llvm::APFloat rhsAPF = toLLVMAPF(rhs);
return lhsAPF.compare(rhsAPF) == llvm::APFloat::cmpLessThan;
}
bool float16_t::operator==(float16_t rhs) const {
llvm::APFloat lhsAPF = toLLVMAPF(*this);
llvm::APFloat rhsAPF = toLLVMAPF(rhs);
return lhsAPF.compare(rhsAPF) == llvm::APFloat::cmpEqual;
}
float16_t float16_t::operator-() const {
llvm::APFloat result = toLLVMAPF(*this);
result.changeSign();
return toFP16(result);
}
