public static IntegerNumber operator -(IntegerNumber number)
{
if (number.bits[number.bits.Length - 1] == SignBit && number.isZero(0, number.bits.Length - 1))
{ //make positive the highly compact negative numbers - as a special case.
ulong[] bits = new ulong[number.bits.Length + 1];
bits[number.bits.Length - 1] = SignBit;
return(new IntegerNumber(bits, false));
}
IntegerNumber result = new IntegerNumber(number.bits, true);
AsmX64Operations.Negate(result.bits, result.Digits);
return(result);
}