/* 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>
/* Specification. */
#include <math.h>
-/* s_atanl.c
+/* s_atanl.c
*
- * Inverse circular tangent for 128-bit long double precision
+ * Inverse circular tangent for 128-bit long double precision
* (arctangent)
*
*
*
*/
-#include "isnanl.h"
-
/* arctan(k/8), k = 0, ..., 82 */
static const long double atantbl[84] = {
0.0000000000000000000000000000000000000000E0L,
{
/* Infinity. */
if (sign)
- return -atantbl[83];
+ return -atantbl[83];
else
- return atantbl[83];
+ return atantbl[83];
}
if (sign)
else
{
/* Index of nearest table element.
- Roundoff to integer is asymmetrical to avoid cancellation when t < 0
+ Roundoff to integer is asymmetrical to avoid cancellation when t < 0
(cf. fdlibm). */
k = 8.0 * x + 0.25;
u = 0.125 * k;