include/fdlibm.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149


/* @(#)fdlibm.h 1.2 95/01/04 */
/*
 * ====================================================
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
 *
 * Developed at SunPro, a Sun Microsystems, Inc. business.
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice
 * is preserved.
 * ====================================================
 */
#ifdef __STDC__
#include <errno.h>
#include <math.h>
#endif

#define _IEEE_LIBM

#if __option(little_endian)
#define __HIp(x) *(1 + (_INT32*)x)
#define __LOp(x) *(_INT32*)x
#else
#define __HIp(x) *(_INT32*)x
#define __LOp(x) *(1 + (_INT32*)x)
#endif

#ifdef __STDC__
#define __P(p) p
#else
#define __P(p) ()
#endif

/*
 * ANSI/POSIX
 */

extern int signgam;

#define MAXFLOAT ((float)3.40282346638528860e+38)

enum fdversion { fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix };

#define _LIB_VERSION_TYPE enum fdversion
#define _LIB_VERSION _fdlib_version

/* if global variable _LIB_VERSION is not desirable, one may
 * change the following to be a constant by:
 *	#define _LIB_VERSION_TYPE const enum version
 * In that case, after one initializes the value _LIB_VERSION (see
 * s_lib_version.c) during compile time, it cannot be modified
 * in the middle of a program
 */
extern _LIB_VERSION_TYPE _LIB_VERSION;

#define _IEEE_ fdlibm_ieee
#define _SVID_ fdlibm_svid
#define _XOPEN_ fdlibm_xopen
#define _POSIX_ fdlibm_posix

struct exception {
  int type;
  char* name;
  double arg1;
  double arg2;
  double retval;
};

#define HUGE MAXFLOAT

/*
 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h>
 * (one may replace the following line by "#include <values.h>")
 */

#define X_TLOSS 1.41484755040568800000e+16

#define DOMAIN 1
#define SING 2
#define OVERFLOW 3
#define UNDERFLOW 4
#define TLOSS 5
#define PLOSS 6

/*
 * ANSI/POSIX
 */

extern int matherr __P((struct exception*));

/*
 * IEEE Test Vector
 */
extern double significand __P((double));

/*
 * Functions callable from C, intended to support IEEE arithmetic.
 */

extern int ilogb __P((double));

/*
 * BSD math library entry points
 */

/*
 * Reentrant version of gamma & lgamma; passes signgam back by reference
 * as the second argument; user must allocate space for signgam.
 */
#ifdef _REENTRANT
extern double gamma_r __P((double, int*));
extern double lgamma_r __P((double, int*));
#endif /* _REENTRANT */

/* ieee style elementary functions */
extern double __ieee754_sqrt __P((double));
extern double __ieee754_acos __P((double));
extern double __ieee754_acosh __P((double));
extern double __ieee754_log __P((double));
extern double __ieee754_atanh __P((double));
extern double __ieee754_asin __P((double));
extern double __ieee754_atan2 __P((double, double));
extern double __ieee754_exp __P((double));
extern double __ieee754_cosh __P((double));
extern double __ieee754_fmod __P((double, double));
extern double __ieee754_pow __P((double, double));
extern double __ieee754_lgamma_r __P((double, int*));
extern double __ieee754_gamma_r __P((double, int*));
extern double __ieee754_lgamma __P((double));
extern double __ieee754_gamma __P((double));
extern double __ieee754_log10 __P((double));
extern double __ieee754_sinh __P((double));
extern double __ieee754_hypot __P((double, double));
extern double __ieee754_j0 __P((double));
extern double __ieee754_j1 __P((double));
extern double __ieee754_y0 __P((double));
extern double __ieee754_y1 __P((double));
extern double __ieee754_jn __P((int, double));
extern double __ieee754_yn __P((int, double));
extern double __ieee754_remainder __P((double, double));
extern int __ieee754_rem_pio2 __P((double, double*));

extern double __ieee754_scalb __P((double, int));

/* fdlibm kernel function */
extern double __kernel_standard __P((double, double, int));
extern double __kernel_sin __P((double, double, int));
extern double __kernel_cos __P((double, double));
extern double __kernel_tan __P((double, double, int));
extern int __kernel_rem_pio2 __P((double*, double*, int, int, int, const int*));