public static double Abs(double value)
{
const ulong mask = 0x7FFFFFFFFFFFFFFF;
ulong raw = BitConverter.DoubleToUInt64Bits(value);
return(BitConverter.UInt64BitsToDouble(raw & mask));
}
//
// Native Declarations
//
//| <include path='docs/doc[@for="Double.IsInfinity"]/*' />
public static bool IsInfinity(double d)
{
ulong v = BitConverter.DoubleToUInt64Bits(d);
return(v == PositiveInfinityAsUInt64 ||
v == NegativeInfinityAsUInt64);
}
//| <include path='docs/doc[@for="Double.IsNaN"]/*' />
public static bool IsNaN(double d)
{
// See also Lightning\Src\ClassLibNative\Float\COMFloat::IsNAN
ulong v = BitConverter.DoubleToUInt64Bits(d);
return(((v & PositiveInfinityAsUInt64) == v) &&
((v & MantissaAsUInt64) != 0));
}
static bool IBinaryNumber <double> .IsPow2(double value)
{
ulong bits = BitConverter.DoubleToUInt64Bits(value);
uint exponent = (uint)(bits >> ExponentShift) & ShiftedExponentMask;
ulong significand = bits & SignificandMask;
return((value > 0) &&
(exponent != MinExponent) && (exponent != MaxExponent) &&
(significand == MinSignificand));
}
//
// IBinaryNumber
//
/// <inheritdoc cref="IBinaryNumber{TSelf}.IsPow2(TSelf)" />
public static bool IsPow2(double value)
{
ulong bits = BitConverter.DoubleToUInt64Bits(value);
ushort biasedExponent = ExtractBiasedExponentFromBits(bits);;
ulong trailingSignificand = ExtractTrailingSignificandFromBits(bits);
return((value > 0) &&
(biasedExponent != MinBiasedExponent) && (biasedExponent != MaxBiasedExponent) &&
(trailingSignificand == MinTrailingSignificand));
}
static double IBitwiseOperators <double, double, double> .operator ~(double value)
{
ulong bits = ~BitConverter.DoubleToUInt64Bits(value);
return(BitConverter.UInt64BitsToDouble(bits));
}
static double IBitwiseOperators <double, double, double> .operator ^(double left, double right)
{
ulong bits = BitConverter.DoubleToUInt64Bits(left) ^ BitConverter.DoubleToUInt64Bits(right);
return(BitConverter.UInt64BitsToDouble(bits));
}
//The hashcode for a double is the absolute value of the integer representation
//of that double.
//
//| <include path='docs/doc[@for="Double.GetHashCode"]/*' />
public override int GetHashCode()
{
long value = unchecked ((long)BitConverter.DoubleToUInt64Bits(m_value));
return(((int)value) ^ ((int)(value >> 32)));
}
