X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fsqrtl.c;h=701ea2c78d8522b14761a5bfb4b6a4384f10d842;hb=1a2869593e115e4a6c74aaa0b23ca612357403ce;hp=4ca99d770a46b329fd04fdaf08b40c43ef6a8fff;hpb=267a39bafd249d7eb9c37df06dc6defcf41cb343;p=gnulib.git
diff --git a/lib/sqrtl.c b/lib/sqrtl.c
index 4ca99d770..701ea2c78 100644
--- a/lib/sqrtl.c
+++ b/lib/sqrtl.c
@@ -1,28 +1,29 @@
/* Emulation for sqrtl.
Contributed by Paolo Bonzini
- Copyright 2002, 2003 Free Software Foundation, Inc.
+ Copyright 2002, 2003, 2007 Free Software Foundation, Inc.
This file is part of gnulib.
- 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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see . */
-#include
+#include
+
+/* Specification. */
#include
-#include "mathl.h"
+#include
/* A simple Newton-Raphson method. */
long double
@@ -31,12 +32,16 @@ sqrtl(long double x)
long double delta, y;
int exponent;
+ /* Check for NaN */
+ if (isnanl (x))
+ return x;
+
/* Check for negative numbers */
if (x < 0.0L)
return (long double) sqrt(-1);
- /* Check for zero, NANs and infinites */
- if (x + x == x || x != x)
+ /* Check for zero and infinites */
+ if (x + x == x)
return x;
frexpl (x, &exponent);