/* Number of bits in the significand. This includes the integer
bit. */
unsigned int precision;
+
+ /* Number of bits actually used in the semantics. */
+ unsigned int sizeInBits;
};
- const fltSemantics APFloat::IEEEhalf = { 15, -14, 11 };
- const fltSemantics APFloat::IEEEsingle = { 127, -126, 24 };
- const fltSemantics APFloat::IEEEdouble = { 1023, -1022, 53 };
- const fltSemantics APFloat::IEEEquad = { 16383, -16382, 113 };
- const fltSemantics APFloat::x87DoubleExtended = { 16383, -16382, 64 };
- const fltSemantics APFloat::Bogus = { 0, 0, 0 };
+ const fltSemantics APFloat::IEEEhalf = { 15, -14, 11, 16 };
+ const fltSemantics APFloat::IEEEsingle = { 127, -126, 24, 32 };
+ const fltSemantics APFloat::IEEEdouble = { 1023, -1022, 53, 64 };
+ const fltSemantics APFloat::IEEEquad = { 16383, -16382, 113, 128 };
+ const fltSemantics APFloat::x87DoubleExtended = { 16383, -16382, 64, 80 };
+ const fltSemantics APFloat::Bogus = { 0, 0, 0, 0 };
/* The PowerPC format consists of two doubles. It does not map cleanly
onto the usual format above. It is approximated using twice the
to represent all possible values held by a PPC double-double number,
for example: (long double) 1.0 + (long double) 0x1p-106
Should this be replaced by a full emulation of PPC double-double? */
- const fltSemantics APFloat::PPCDoubleDouble = { 1023, -1022 + 53, 53 + 53 };
+ const fltSemantics APFloat::PPCDoubleDouble = { 1023, -1022 + 53, 53 + 53, 128 };
/* A tight upper bound on number of parts required to hold the value
pow(5, power) is
return false;
if (category==fcZero || category==fcInfinity)
return true;
- else if (isFiniteNonZero() && exponent!=rhs.exponent)
+
+ if (isFiniteNonZero() && exponent != rhs.exponent)
return false;
- else {
- int i= partCount();
- const integerPart* p=significandParts();
- const integerPart* q=rhs.significandParts();
- for (; i>0; i--, p++, q++) {
- if (*p != *q)
- return false;
- }
- return true;
- }
+
+ return std::equal(significandParts(), significandParts() + partCount(),
+ rhs.significandParts());
}
APFloat::APFloat(const fltSemantics &ourSemantics, integerPart value) {
{
return semantics.precision;
}
+APFloat::ExponentType
+APFloat::semanticsMaxExponent(const fltSemantics &semantics)
+{
+ return semantics.maxExponent;
+}
+APFloat::ExponentType
+APFloat::semanticsMinExponent(const fltSemantics &semantics)
+{
+ return semantics.minExponent;
+}
+unsigned int
+APFloat::semanticsSizeInBits(const fltSemantics &semantics)
+{
+ return semantics.sizeInBits;
+}
const integerPart *
APFloat::significandParts() const
return false;
case rmTowardPositive:
- return sign == false;
+ return !sign;
case rmTowardNegative:
- return sign == true;
+ return sign;
}
llvm_unreachable("Invalid rounding mode found");
}
/* Determine if the operation on the absolute values is effectively
an addition or subtraction. */
- subtract ^= (sign ^ rhs.sign) ? true : false;
+ subtract ^= static_cast<bool>(sign ^ rhs.sign);
/* Are we bigger exponent-wise than the RHS? */
bits = exponent - rhs.exponent;
/* If two numbers add (exactly) to zero, IEEE 754 decrees it is a
positive zero unless rounding to minus infinity, except that
adding two like-signed zeroes gives that zero. */
- if (category == fcZero && sign != addend.sign)
+ if (category == fcZero && !(fs & opUnderflow) && sign != addend.sign)
sign = (rounding_mode == rmTowardNegative);
} else {
fs = multiplySpecials(multiplicand);
roundingMode rounding_mode)
{
unsigned int parts, pow5PartCount;
- fltSemantics calcSemantics = { 32767, -32767, 0 };
+ fltSemantics calcSemantics = { 32767, -32767, 0, 0 };
integerPart pow5Parts[maxPowerOfFiveParts];
bool isNearest;
}
}
+unsigned APFloat::getSizeInBits(const fltSemantics &Sem) {
+ return Sem.sizeInBits;
+}
+
/// Make this number the largest magnitude normal number in the given
/// semantics.
void APFloat::makeLargest(bool Negative) {
APFloat llvm::scalbn(APFloat X, int Exp) {
if (X.isInfinity() || X.isZero() || X.isNaN())
- return std::move(X);
+ return X;
auto MaxExp = X.getSemantics().maxExponent;
auto MinExp = X.getSemantics().minExponent;
return APFloat::getZero(X.getSemantics(), X.isNegative());
X.exponent += Exp;
- return std::move(X);
+ return X;
}