NAME
        IEEESPExp -- compute the exponential of e

   SYNOPSIS
          x   = IEEESPExp(  y  );
        d0                d0

        float   x,y;

   FUNCTION
        Compute e^y in IEEE single precision

   INPUTS
        y - IEEE single precision floating point value

   RESULT
        x - IEEE single precision floating point value

   BUGS

   SEE ALSO
        ieeesplog()