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   NAME
	IEEESPAtan -- compute the arc tangent of number

   SYNOPSIS
	  x   = IEEESPAtan(  y  );
	d0		   d0

	single	x,y;

   FUNCTION
	Compute arctangent of y in IEEE single precision

   INPUTS
	y - IEEE single precision floating point value

   RESULT
	x - IEEE single precision floating point value

   BUGS

   SEE ALSO