Fix cproj implmentation.

1 files changed, 5 insertions, 17 deletions

diff --git a/sysdeps/ieee754/ldbl-128ibm/s_cprojl.c b/sysdeps/ieee754/ldbl-128ibm/s_cprojl.c
index 2167db3d91..b2a09ae885 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_cprojl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_cprojl.c
@@ -1,5 +1,5 @@
 /* Compute projection of complex long double value to Riemann sphere.
-   Copyright (C) 1997,1999,2006 Free Software Foundation, Inc.
+   Copyright (C) 1997,1999,2006,2010 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -25,30 +25,18 @@
 __complex__ long double
 __cprojl (__complex__ long double x)
 {
-  __complex__ long double res;
-
   if (isnan (__real__ x) && isnan (__imag__ x))
     return x;
   else if (!isfinite (__real__ x) || !isfinite (__imag__ x))
     {
+      __complex__ long double res;
+
       __real__ res = INFINITY;
       __imag__ res = __copysignl (0.0, __imag__ x);
-    }
-  else
-    {
-      long 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;
-      /* __gcc_qmul does not respect -0.0 so we need the following fixup.  */
-       if (__real__ x == 0.0)
-         __real__ res = __real__ x;
 
-       if (__imag__ x == 0.0)
-         __imag__ res = __imag__ x;
+      return res;
     }
 
-  return res;
+  return x;
 }
 long_double_symbol (libm, __cprojl, cprojl);