1/* Copyright JS Foundation and other contributors, http://js.foundation
2 *
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 *
15 * This file is based on work under the following copyright and permission
16 * notice:
17 *
18 *     Copyright (C) 2004 by Sun Microsystems, Inc. All rights reserved.
19 *
20 *     Permission to use, copy, modify, and distribute this
21 *     software is freely granted, provided that this notice
22 *     is preserved.
23 *
24 *     @(#)fdlibm.h 1.5 04/04/22
25 */
26
27#ifndef JERRY_LIBM_INTERNAL_H
28#define JERRY_LIBM_INTERNAL_H
29
30/* Sometimes it's necessary to define __LITTLE_ENDIAN explicitly
31   but these catch some common cases. */
32
33#ifndef __LITTLE_ENDIAN
34/* Check if compiler has byte order macro. Some older versions do not.
35 * If byte order is supported and set to little or target is among common
36 * cases checked define __LITTLE_ENDIAN.
37 */
38#if (defined (i386) || defined (__i386) || defined (__i386__) || \
39     defined (i486) || defined (__i486) || defined (__i486__) || \
40     defined (intel) || defined (x86) || defined (i86pc) || \
41     defined (__alpha) || defined (__osf__) || \
42     defined (__x86_64__) || defined (__arm__) || defined (__aarch64__) || \
43     defined (__xtensa__) || defined (__MIPSEL)) || \
44(defined (__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__))
45#define __LITTLE_ENDIAN
46#endif
47#endif /* !__LITTLE_ENDIAN */
48
49#ifdef __LITTLE_ENDIAN
50#define __HI(x) *(1 + (const int *) &x)
51#define __LO(x) *(const int *) &x
52typedef union
53{
54  double dbl;
55  struct
56  {
57    int lo;
58    int hi;
59  } as_int;
60} double_accessor;
61#else /* !__LITTLE_ENDIAN */
62#define __HI(x) *(const int *) &x
63#define __LO(x) *(1 + (const int *) &x)
64
65typedef union
66{
67  double dbl;
68  struct
69  {
70    int hi;
71    int lo;
72  } as_int;
73} double_accessor;
74#endif /* __LITTLE_ENDIAN */
75
76#ifndef NAN
77#define NAN (0.0/0.0)
78#endif
79
80/*
81 * ANSI/POSIX
82 */
83double acos (double x);
84double asin (double x);
85double atan (double x);
86double atan2 (double y, double x);
87double cos (double x);
88double sin (double x);
89double tan (double x);
90
91double cosh (double x);
92double sinh (double x);
93double tanh (double x);
94
95double acosh (double x);
96double asinh (double x);
97double atanh (double x);
98
99double exp (double x);
100double expm1 (double x);
101double log (double x);
102double log1p (double x);
103double log2 (double x);
104double log10 (double);
105
106double pow (double x, double y);
107double sqrt (double x);
108double cbrt (double);
109
110double ceil (double x);
111double fabs (double x);
112double floor (double x);
113double fmod (double x, double y);
114
115int isnan (double x);
116int finite (double x);
117
118double nextafter (double x, double y);
119
120/*
121 * Functions callable from C, intended to support IEEE arithmetic.
122 */
123double copysign (double x, double y);
124double scalbn (double x, int n);
125
126#endif /* !JERRY_LIBM_INTERNAL_H */
127