NAME
    IEEEDPAtan -- compute the arctangent of a floating point number

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

    double  x,y;

FUNCTION
    Compute arctangent of y in IEEE double precision

INPUTS
    y - IEEE double precision floating point value

RESULT
    x - IEEE double precision floating point value

BUGS

SEE ALSO
    IEEEDPTan(), IEEEDPAsin(), IEEEDPACos()