/* 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
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>
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)
{
{
return (x - x) / ZERO;
}
- /* log (infinity or NaN) */
- if (x + x == x || x != x)
+ /* log (infinity) */
+ if (x + x == x)
{
return x + x;
}