allow renaming bootstrap, and change the name of bootstrap.conf accordingly

[gnulib.git] / lib / atanl.c

diff --git a/lib/atanl.c b/lib/atanl.c
index 16c8dc1..eca4177 100644 (file)
--- a/lib/atanl.c
+++ b/lib/atanl.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>
 
@@ -64,6 +62,7 @@
  *
  */
 
+#include "isnanl.h"
 
 /* arctan(k/8), k = 0, ..., 82 */
 static const long double atantbl[84] = {
@@ -178,12 +177,12 @@ atanl (long double x)
   int k, sign;
   long double t, u, p, q;
 
-  sign = x < 0.0;
-
   /* Check for zero or NaN.  */
-  if (x != x || x == 0.0)
+  if (isnanl (x) || x == 0.0)
     return x + x;
 
+  sign = x < 0.0;
+
   if (x + x == x)
     {
       /* Infinity. */