/* Compute projection of complex float value to Riemann sphere.
- Copyright (C) 1997, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1997-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#include <complex.h>
#include <math.h>
__complex__ float
__cprojf (__complex__ float x)
{
- __complex__ float res;
-
if (isnan (__real__ x) && isnan (__imag__ x))
return x;
else if (!isfinite (__real__ x) || !isfinite (__imag__ x))
{
+ __complex__ float res;
+
__real__ res = INFINITY;
__imag__ res = __copysignf (0.0, __imag__ x);
- }
- else
- {
- float den = __real__ x * __real__ x + __imag__ x * __imag__ x + 1.0;
- __real__ res = (2.0 * __real__ x) / den;
- __imag__ res = (2.0 * __imag__ x) / den;
+ return res;
}
- return res;
+ return x;
}
#ifndef __cprojf
weak_alias (__cprojf, cprojf)