Function abs64

MathExtras.h:401–403

abs64 - absolute value of a 64-bit int. Not all environments support "abs" on whatever their name for the 64-bit int type is. The absolute value of the largest negative number is undefined, as with "abs".

/// "abs" on whatever their name for the 64-bit int type is.  The absolute
/// value of the largest negative number is undefined, as with "abs".
static inline int64_t abs64(int64_t x) {
	return (x < 0) ? -x : x;
}

/// \brief Sign extend number in the bottom B bits of X to a 32-bit int.
/// Requires 0 < B <= 32.