NAME
        IEEEDPDiv -- divide one double precision IEEE by another
   SYNOPSIS
          x   = IEEEDPDiv(  y  ,  z  );
        d0/d1             d0/d1 d2/d3
        double  x,y,z;
   FUNCTION
        Compute x = y / z in IEEE double precision.
   INPUTS
        y -- IEEE double precision floating point value
        z -- IEEE double precision floating point value
   RESULT
        x -- IEEE double precision floating point value
   BUGS
   SEE ALSO
        ieeedpmul()