/* 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.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-#include <float.h>
+#include <config.h>
+
+/* Specification. */
#include <math.h>
-#include "mathl.h"
+#include <float.h>
+#include "isnanl.h"
/* A simple Newton-Raphson method. */
long double
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);