1/* The GNU C Library is free software; you can redistribute it and/or
2   modify it under the terms of the GNU Lesser General Public
3   License as published by the Free Software Foundation; either
4   version 2.1 of the License, or (at your option) any later version.
5
6   The GNU C Library is distributed in the hope that it will be useful,
7   but WITHOUT ANY WARRANTY; without even the implied warranty of
8   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
9   Lesser General Public License for more details.
10
11   You should have received a copy of the GNU Lesser General Public
12   License along with the GNU C Library; if not, write to the Free
13   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
14   02111-1307 USA.  */
15
16#ifndef	_MATH_H
17#define	_MATH_H	1
18
19#include_next <math.h>
20
21#include <features.h>
22
23#if __GNUC__ == 2
24#define __HUGE_VALL_bytes	{ 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f, 0, 0 }
25
26#define __huge_vall_t	union { unsigned char __c[12]; long double __ld; }
27#define HUGE_VALL	(__extension__ \
28			 ((__huge_vall_t) { __c: __HUGE_VALL_bytes }).__ld)
29#endif
30
31/* The above constants are not adequate for computation using `long double's.
32   Therefore we provide as an extension constants with similar names as a
33   GNU extension.  Provide enough digits for the 128-bit IEEE quad.  */
34# define M_El		2.7182818284590452353602874713526625L  /* e */
35# define M_LOG2El	1.4426950408889634073599246810018921L  /* log_2 e */
36# define M_LOG10El	0.4342944819032518276511289189166051L  /* log_10 e */
37# define M_LN2l		0.6931471805599453094172321214581766L  /* log_e 2 */
38# define M_LN10l	2.3025850929940456840179914546843642L  /* log_e 10 */
39# define M_PIl		3.1415926535897932384626433832795029L  /* pi */
40# define M_PI_2l	1.5707963267948966192313216916397514L  /* pi/2 */
41# define M_PI_4l	0.7853981633974483096156608458198757L  /* pi/4 */
42# define M_1_PIl	0.3183098861837906715377675267450287L  /* 1/pi */
43# define M_2_PIl	0.6366197723675813430755350534900574L  /* 2/pi */
44# define M_2_SQRTPIl	1.1283791670955125738961589031215452L  /* 2/sqrt(pi) */
45# define M_SQRT2l	1.4142135623730950488016887242096981L  /* sqrt(2) */
46# define M_SQRT1_2l	0.7071067811865475244008443621048490L  /* 1/sqrt(2) */
47
48extern void sincos(double x, double *sin, double *cos);
49extern void sincosf(float x, float *sin, float *cos);
50extern void sincosl(long double x, long double *sin, long double *cos);
51
52#endif /* math.h  */
53