static std::string toString(const APFloat &FP) {
static const size_t BufBytes = 128;
char buf[BufBytes];
if (FP.isNaN())
assert((FP.bitwiseIsEqual(APFloat::getQNaN(FP.getSemantics())) ||
FP.bitwiseIsEqual(
APFloat::getQNaN(FP.getSemantics(), /*Negative=*/true))) &&
"convertToHexString handles neither SNaN nor NaN payloads");
// Use C99's hexadecimal floating-point representation.
auto Written = FP.convertToHexString(
buf, /*hexDigits=*/0, /*upperCase=*/false, APFloat::rmNearestTiesToEven);
(void)Written;
assert(Written != 0);
assert(Written < BufBytes);
return buf;
}
int FunctionComparator::cmpAPFloats(const APFloat &L, const APFloat &R) const {
// Floats are ordered first by semantics (i.e. float, double, half, etc.),
// then by value interpreted as a bitstring (aka APInt).
const fltSemantics &SL = L.getSemantics(), &SR = R.getSemantics();
if (int Res = cmpNumbers(APFloat::semanticsPrecision(SL),
APFloat::semanticsPrecision(SR)))
return Res;
if (int Res = cmpNumbers(APFloat::semanticsMaxExponent(SL),
APFloat::semanticsMaxExponent(SR)))
return Res;
if (int Res = cmpNumbers(APFloat::semanticsMinExponent(SL),
APFloat::semanticsMinExponent(SR)))
return Res;
if (int Res = cmpNumbers(APFloat::semanticsSizeInBits(SL),
APFloat::semanticsSizeInBits(SR)))
return Res;
return cmpAPInts(L.bitcastToAPInt(), R.bitcastToAPInt());
}
/// ConvertToSInt - Convert APF to an integer, if possible.
static bool ConvertToSInt(const APFloat &APF, int64_t &IntVal) {
bool isExact = false;
if (&APF.getSemantics() == &APFloat::PPCDoubleDouble)
return false;
// See if we can convert this to an int64_t
uint64_t UIntVal;
if (APF.convertToInteger(&UIntVal, 64, true, APFloat::rmTowardZero,
&isExact) != APFloat::opOK || !isExact)
return false;
IntVal = UIntVal;
return true;
}
/// convertToInt - Convert APF to an integer, if possible.
static bool convertToInt(const APFloat &APF, uint64_t *intVal) {
bool isExact = false;
if (&APF.getSemantics() == &APFloat::PPCDoubleDouble)
return false;
if (APF.convertToInteger(intVal, 32, APF.isNegative(),
APFloat::rmTowardZero, &isExact)
!= APFloat::opOK)
return false;
if (!isExact)
return false;
return true;
}
static std::string toString(const APFloat &FP) {
// Print NaNs with custom payloads specially.
if (FP.isNaN() &&
!FP.bitwiseIsEqual(APFloat::getQNaN(FP.getSemantics())) &&
!FP.bitwiseIsEqual(APFloat::getQNaN(FP.getSemantics(), /*Negative=*/true))) {
APInt AI = FP.bitcastToAPInt();
return
std::string(AI.isNegative() ? "-" : "") + "nan:0x" +
utohexstr(AI.getZExtValue() &
(AI.getBitWidth() == 32 ? INT64_C(0x007fffff) :
INT64_C(0x000fffffffffffff)),
/*LowerCase=*/true);
}
// Use C99's hexadecimal floating-point representation.
static const size_t BufBytes = 128;
char buf[BufBytes];
auto Written = FP.convertToHexString(
buf, /*hexDigits=*/0, /*upperCase=*/false, APFloat::rmNearestTiesToEven);
(void)Written;
assert(Written != 0);
assert(Written < BufBytes);
return buf;
}