X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Flogl.c;h=52adaecc17d08469521f4180efeb227c23601ac6;hb=23d025fefa14a3815f8b804725acfd5622d3a4ac;hp=dc75a8fd72cf441dd100547f4835da18bad90fee;hpb=e1123c2f4fedae90435426a82a05cf2e3233e97d;p=gnulib.git

diff --git a/lib/logl.c b/lib/logl.c
index dc75a8fd7..52adaecc1 100644
--- a/lib/logl.c
+++ b/lib/logl.c
@@ -1,9 +1,9 @@
 /* Copyright 2001 by Stephen L. Moshier <moshier@na-net.ornl.gov>
 
-   This program is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -11,9 +11,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; see the file COPYING.
-   If not, write to the Free Software Foundation,
-   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <config.h>
 
@@ -190,12 +188,16 @@ long double
 logl(long double x)
 {
   long double z, y, w;
-  long double u, t;
-  unsigned int m;
+  long double t;
   int k, e;
 
   /* Check for IEEE special cases.  */
 
+  /* log(NaN) = NaN. */
+  if (isnanl (x))
+    {
+      return x;
+    }
   /* log(0) = -infinity. */
   if (x == 0.0L)
     {
@@ -206,8 +208,8 @@ logl(long double x)
     {
       return (x - x) / ZERO;
     }
-  /* log (infinity or NaN) */
-  if (x + x == x || x != x)
+  /* log (infinity) */
+  if (x + x == x)
     {
       return x + x;
     }