C++ (Cpp) APFloat::getSemantics Examples

Example #1

File: WebAssemblyAsmPrinter.cpp Project: r0mai/llvm

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;
}

Example #2

File: FunctionComparator.cpp Project: AstroVPK/LLVM-4.0.0

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());
}

Example #3

File: IndVarSimplify.cpp Project: nickl-/xchain-ios

/// 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;
}

Example #4

File: IndVarSimplify.cpp Project: Gcrosby5269/clamav-bytecode-compiler

/// 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;

}

Example #5

File: WebAssemblyInstPrinter.cpp Project: CristinaCristescu/llvm

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;
}