1 2 /* @(#)fdlibm.h 1.5 04/04/22 */ 3 /* 4 * ==================================================== 5 * Copyright (C) 2004 by Sun Microsystems, Inc. All rights reserved. 6 * 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13 /* Sometimes it's necessary to define __LITTLE_ENDIAN explicitly 14 but these catch some common cases. */ 15 16 #if defined(i386) || defined(i486) || \ 17 defined(intel) || defined(x86) || defined(i86pc) || \ 18 defined(__alpha) || defined(__osf__) 19 #define __LITTLE_ENDIAN 20 #endif 21 22 #ifdef __LITTLE_ENDIAN 23 #define __HI(x) *(1+(int*)&x) 24 #define __LO(x) *(int*)&x 25 #define __HIp(x) *(1+(int*)x) 26 #define __LOp(x) *(int*)x 27 #else 28 #define __HI(x) *(int*)&x 29 #define __LO(x) *(1+(int*)&x) 30 #define __HIp(x) *(int*)x 31 #define __LOp(x) *(1+(int*)x) 32 #endif 33 34 #ifdef __STDC__ 35 #define __P(p) p 36 #else 37 #define __P(p) () 38 #endif 39 40 /* 41 * ANSI/POSIX 42 */ 43 44 extern int signgam; 45 46 #define MAXFLOAT ((float)3.40282346638528860e+38) 47 48 enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix}; 49 50 #define _LIB_VERSION_TYPE enum fdversion 51 #define _LIB_VERSION _fdlib_version 52 53 /* if global variable _LIB_VERSION is not desirable, one may 54 * change the following to be a constant by: 55 * #define _LIB_VERSION_TYPE const enum version 56 * In that case, after one initializes the value _LIB_VERSION (see 57 * s_lib_version.c) during compile time, it cannot be modified 58 * in the middle of a program 59 */ 60 extern _LIB_VERSION_TYPE _LIB_VERSION; 61 62 #define _IEEE_ fdlibm_ieee 63 #define _SVID_ fdlibm_svid 64 #define _XOPEN_ fdlibm_xopen 65 #define _POSIX_ fdlibm_posix 66 67 struct exception { 68 int type; 69 char *name; 70 double arg1; 71 double arg2; 72 double retval; 73 }; 74 75 #define HUGE MAXFLOAT 76 77 /* 78 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h> 79 * (one may replace the following line by "#include <values.h>") 80 */ 81 82 #define X_TLOSS 1.41484755040568800000e+16 83 84 #define DOMAIN 1 85 #define SING 2 86 #define OVERFLOW 3 87 #define UNDERFLOW 4 88 #define TLOSS 5 89 #define PLOSS 6 90 91 /* 92 * ANSI/POSIX 93 */ 94 extern double acos __P((double)); 95 extern double asin __P((double)); 96 extern double atan __P((double)); 97 extern double atan2 __P((double, double)); 98 extern double cos __P((double)); 99 extern double sin __P((double)); 100 extern double tan __P((double)); 101 102 extern double cosh __P((double)); 103 extern double sinh __P((double)); 104 extern double tanh __P((double)); 105 106 extern double exp __P((double)); 107 extern double frexp __P((double, int *)); 108 extern double ldexp __P((double, int)); 109 extern double log __P((double)); 110 extern double log10 __P((double)); 111 extern double modf __P((double, double *)); 112 113 extern double pow __P((double, double)); 114 extern double sqrt __P((double)); 115 116 extern double ceil __P((double)); 117 extern double fabs __P((double)); 118 extern double floor __P((double)); 119 extern double fmod __P((double, double)); 120 121 extern double erf __P((double)); 122 extern double erfc __P((double)); 123 extern double gamma __P((double)); 124 extern double hypot __P((double, double)); 125 extern int isnan __P((double)); 126 extern int finite __P((double)); 127 extern double j0 __P((double)); 128 extern double j1 __P((double)); 129 extern double jn __P((int, double)); 130 extern double lgamma __P((double)); 131 extern double y0 __P((double)); 132 extern double y1 __P((double)); 133 extern double yn __P((int, double)); 134 135 extern double acosh __P((double)); 136 extern double asinh __P((double)); 137 extern double atanh __P((double)); 138 extern double cbrt __P((double)); 139 extern double logb __P((double)); 140 extern double nextafter __P((double, double)); 141 extern double remainder __P((double, double)); 142 #ifdef _SCALB_INT 143 extern double scalb __P((double, int)); 144 #else 145 extern double scalb __P((double, double)); 146 #endif 147 148 extern int matherr __P((struct exception *)); 149 150 /* 151 * IEEE Test Vector 152 */ 153 extern double significand __P((double)); 154 155 /* 156 * Functions callable from C, intended to support IEEE arithmetic. 157 */ 158 extern double copysign __P((double, double)); 159 extern int ilogb __P((double)); 160 extern double rint __P((double)); 161 extern double scalbn __P((double, int)); 162 163 /* 164 * BSD math library entry points 165 */ 166 extern double expm1 __P((double)); 167 extern double log1p __P((double)); 168 169 /* 170 * Reentrant version of gamma & lgamma; passes signgam back by reference 171 * as the second argument; user must allocate space for signgam. 172 */ 173 #ifdef _REENTRANT 174 extern double gamma_r __P((double, int *)); 175 extern double lgamma_r __P((double, int *)); 176 #endif /* _REENTRANT */ 177 178 /* ieee style elementary functions */ 179 extern double __ieee754_sqrt __P((double)); 180 extern double __ieee754_acos __P((double)); 181 extern double __ieee754_acosh __P((double)); 182 extern double __ieee754_log __P((double)); 183 extern double __ieee754_atanh __P((double)); 184 extern double __ieee754_asin __P((double)); 185 extern double __ieee754_atan2 __P((double,double)); 186 extern double __ieee754_exp __P((double)); 187 extern double __ieee754_cosh __P((double)); 188 extern double __ieee754_fmod __P((double,double)); 189 extern double __ieee754_pow __P((double,double)); 190 extern double __ieee754_lgamma_r __P((double,int *)); 191 extern double __ieee754_gamma_r __P((double,int *)); 192 extern double __ieee754_lgamma __P((double)); 193 extern double __ieee754_gamma __P((double)); 194 extern double __ieee754_log10 __P((double)); 195 extern double __ieee754_sinh __P((double)); 196 extern double __ieee754_hypot __P((double,double)); 197 extern double __ieee754_j0 __P((double)); 198 extern double __ieee754_j1 __P((double)); 199 extern double __ieee754_y0 __P((double)); 200 extern double __ieee754_y1 __P((double)); 201 extern double __ieee754_jn __P((int,double)); 202 extern double __ieee754_yn __P((int,double)); 203 extern double __ieee754_remainder __P((double,double)); 204 extern int __ieee754_rem_pio2 __P((double,double*)); 205 #ifdef _SCALB_INT 206 extern double __ieee754_scalb __P((double,int)); 207 #else 208 extern double __ieee754_scalb __P((double,double)); 209 #endif 210 211 /* fdlibm kernel function */ 212 extern double __kernel_sin __P((double,double,int)); 213 extern double __kernel_cos __P((double,double)); 214 extern double __kernel_tan __P((double,double,int)); 215 extern int __kernel_rem_pio2 __P((double*,double*,int,int,int,const int*)); 216