Fix cproj implmentation.

1 files changed, 6 insertions, 11 deletions

diff --git a/math/s_cproj.c b/math/s_cproj.c
index 8e7ca41df8..90e5ebaa4e 100644
--- a/math/s_cproj.c
+++ b/math/s_cproj.c
@@ -1,5 +1,5 @@
 /* Compute projection of complex double value to Riemann sphere.
-   Copyright (C) 1997, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1999, 2010 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -25,24 +25,19 @@
 __complex__ double
 __cproj (__complex__ double x)
 {
-  __complex__ double res;
-
   if (isnan (__real__ x) && isnan (__imag__ x))
     return x;
   else if (!isfinite (__real__ x) || !isfinite (__imag__ x))
     {
+      __complex__ double res;
+
       __real__ res = INFINITY;
       __imag__ res = __copysign (0.0, __imag__ x);
-    }
-  else
-    {
-      double 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;
 }
 weak_alias (__cproj, cproj)
 #ifdef NO_LONG_DOUBLE