NAME
        IEEEDPExp -- compute the exponential of e

   SYNOPSIS
          x   = IEEEDPExp(  y  );
        d0/d1             d0/d1

        double  x,y;

   FUNCTION
        Compute e^y in IEEE double precision

   INPUTS
        y - IEEE double precision floating point value

   RESULT
        x - IEEE double precision floating point value

   BUGS

   SEE ALSO
        ieeedplog()