/// <summary>
/// Returns a specified number raised to the specified power. Saturates
/// </summary>
/// <exception cref="DivideByZeroException">
/// The base was zero, with a negative exponent
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// The base was negative, with a non-zero exponent
/// </exception>
public static Fix32 Pow(this Fix32 b, Fix32 exp)
{
#if USE_DOUBLES
return(Math.Pow(b.ToDouble(), exp.ToDouble()).ToFix32());
#endif
if ((int)b == (int)Fix32.One)
{
return(Fix32.One);
}
if ((int)exp == 0)
{
return(Fix32.One);
}
if ((int)b == 0)
{
if ((int)exp < 0)
{
throw new DivideByZeroException();
}
return(Fix32.Zero);
}
if (b < 0 && exp != 0)
{
throw new ArgumentOutOfRangeException("Non-positive value passed to Ln", "x");
}
return(exp.Mul(b.Log2()).Pow2());
}