/* Quad-precision floating point argument reduction.
- Copyright (C) 1999 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jj@ultra.linux.cz>
- The GNU C Library 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 of the License, 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.
- The GNU C Library is distributed in the hope that it will be useful,
+ 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
- Lesser General Public License for more details.
+ 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 the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 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 <http://www.gnu.org/licenses/>. */
+#include <config.h>
+
+/* Specification. */
#include <math.h>
-#include <float.h>
-#include "mathl.h"
+#include <float.h>
/* Table of constants for 2/pi, 5628 hexadecimal digits of 2/pi */
static const int two_over_pi[] = {
int exp, n;
if (x >= -0.78539816339744830961566084581987572104929234984377
- && x < 0.78539816339744830961566084581987572104929234984377)
+ && x <= 0.78539816339744830961566084581987572104929234984377)
/* x in <-pi/4, pi/4> */
{
y[0] = x;
return 0;
}
- if (x >= 2.35619449019234492884698253745962716314787704953131
- && x < 2.35619449019234492884698253745962716314787704953131)
- if (x > 0)
+ if (x > 0 && x < 2.35619449019234492884698253745962716314787704953131)
{
/* 113 + 93 bit PI is ok */
z = x - PI_2_1;
y[1] = (z - y[0]) - PI_2_1t;
return 1;
}
- else
+
+ if (x < 0 && x > -2.35619449019234492884698253745962716314787704953131)
{
/* 113 + 93 bit PI is ok */
z = x + PI_2_1;
return -1;
}
- if (x + x == x || x != x) /* x is +=oo or NaN */
+ if (x + x == x) /* x is ±oo */
{
y[0] = x - x;
y[1] = y[0];
static const double zero = 0.0, one = 1.0, two24 = 1.67772160000000000000e+07, /* 0x41700000, 0x00000000 */
twon24 = 5.96046447753906250000e-08; /* 0x3E700000, 0x00000000 */
-int
+static int
kernel_rem_pio2 (double *x, double *y, int e0, int nx, int prec,
const int *ipio2)
{