X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fsqrtl.c;h=61e9574d1a8c20ccc2d4773a72e5b9513c1e9f31;hb=5191b3546cfb6c163228c23f214e325ddf60d46f;hp=ed914a278c2f3c1f184b8b56b9ff984efe73923e;hpb=5657b2536d242966c41c268b9ab4fe8df727bb13;p=gnulib.git
diff --git a/lib/sqrtl.c b/lib/sqrtl.c
index ed914a278..61e9574d1 100644
--- a/lib/sqrtl.c
+++ b/lib/sqrtl.c
@@ -1,44 +1,57 @@
/* Emulation for sqrtl.
Contributed by Paolo Bonzini
- Copyright 2002, 2003 Free Software Foundation, Inc.
+ Copyright 2002-2003, 2007, 2009-2013 Free Software Foundation, Inc.
This file is part of gnulib.
- gnulib is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published
- by the Free Software Foundation; either version 2.1, or (at your option)
- any later version.
+ 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 3 of the License, or
+ (at your option) any later version.
- gnulib 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 Lesser General Public
- License for more details.
+ 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 Lesser General Public License
- along with gnulib; see the file COPYING.LIB. If not, write to the Free
- Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- 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"
+#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
+
+long double
+sqrtl (long double x)
+{
+ return sqrt (x);
+}
+
+#else
+
+# include
/* A simple Newton-Raphson method. */
long double
-sqrtl(long double x)
+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);
+ 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);
@@ -54,3 +67,5 @@ sqrtl(long double x)
return y;
}
+
+#endif