@HotSpotIntrinsicCandidate
public static double exp (double a)

Returns Euler's number e raised to the power of a double value. Special cases:

The computed result must be within 1 ulp of the exact result. Results must be semi-monotonic.

Parameters:
a    the exponent to raise e to.

Returns:  the value e a, where e is the base of the natural logarithms.