include/math.h

   1 #ifndef _MATH_H
   2 #define _MATH_H
   3
   4 #ifdef __cplusplus
   5 extern "C" {
   6 #endif
   7
   8 #include <features.h>
   9
  10 #define __NEED_float_t
  11 #define __NEED_double_t
  12 #include <bits/alltypes.h>
  13
  14 #if 100*__GNUC__+__GNUC_MINOR__ >= 303
  15 #define NAN       __builtin_nanf("")
  16 #define INFINITY  __builtin_inff()
  17 #else
  18 #define NAN       (0.0f/0.0f)
  19 #define INFINITY  1e5000f
  20 #endif
  21
  22 #define HUGE_VALF INFINITY
  23 #define HUGE_VAL  ((double)INFINITY)
  24 #define HUGE_VALL ((long double)INFINITY)
  25
  26 #define MATH_ERRNO  1
  27 #define MATH_ERREXCEPT 2
  28 #define math_errhandling 2
  29
  30 #define FP_ILOGBNAN (-1-(int)(((unsigned)-1)>>1))
  31 #define FP_ILOGB0 FP_ILOGBNAN
  32
  33 #define FP_NAN       0
  34 #define FP_INFINITE  1
  35 #define FP_ZERO      2
  36 #define FP_SUBNORMAL 3
  37 #define FP_NORMAL    4
  38
  39 int __fpclassify(double);
  40 int __fpclassifyf(float);
  41 int __fpclassifyl(long double);
  42
  43 static __inline unsigned __FLOAT_BITS(float __f)
  44 {
  45         union {float __f; unsigned __i;} __u;
  46         __u.__f = __f;
  47         return __u.__i;
  48 }
  49 static __inline unsigned long long __DOUBLE_BITS(double __f)
  50 {
  51         union {double __f; unsigned long long __i;} __u;
  52         __u.__f = __f;
  53         return __u.__i;
  54 }
  55
  56 #define fpclassify(x) ( \
  57         sizeof(x) == sizeof(float) ? __fpclassifyf(x) : \
  58         sizeof(x) == sizeof(double) ? __fpclassify(x) : \
  59         __fpclassifyl(x) )
  60
  61 #define isinf(x) ( \
  62         sizeof(x) == sizeof(float) ? (__FLOAT_BITS(x) & 0x7fffffff) == 0x7f800000 : \
  63         sizeof(x) == sizeof(double) ? (__DOUBLE_BITS(x) & -1ULL>>1) == 0x7ffULL<<52 : \
  64         __fpclassifyl(x) == FP_INFINITE)
  65
  66 #define isnan(x) ( \
  67         sizeof(x) == sizeof(float) ? (__FLOAT_BITS(x) & 0x7fffffff) > 0x7f800000 : \
  68         sizeof(x) == sizeof(double) ? (__DOUBLE_BITS(x) & -1ULL>>1) > 0x7ffULL<<52 : \
  69         __fpclassifyl(x) == FP_NAN)
  70
  71 #define isnormal(x) ( \
  72         sizeof(x) == sizeof(float) ? ((__FLOAT_BITS(x)+0x00800000) & 0x7fffffff) >= 0x01000000 : \
  73         sizeof(x) == sizeof(double) ? ((__DOUBLE_BITS(x)+(1ULL<<52)) & -1ULL>>1) >= 1ULL<<53 : \
  74         __fpclassifyl(x) == FP_NORMAL)
  75
  76 #define isfinite(x) ( \
  77         sizeof(x) == sizeof(float) ? (__FLOAT_BITS(x) & 0x7fffffff) < 0x7f800000 : \
  78         sizeof(x) == sizeof(double) ? (__DOUBLE_BITS(x) & -1ULL>>1) < 0x7ffULL<<52 : \
  79         __fpclassifyl(x) > FP_INFINITE)
  80
  81 int __signbit(double);
  82 int __signbitf(float);
  83 int __signbitl(long double);
  84
  85 #define signbit(x) ( \
  86         sizeof(x) == sizeof(float) ? (int)(__FLOAT_BITS(x)>>31) : \
  87         sizeof(x) == sizeof(double) ? (int)(__DOUBLE_BITS(x)>>63) : \
  88         __signbitl(x) )
  89
  90 #define isunordered(x,y) (isnan((x)) ? ((void)(y),1) : isnan((y)))
  91
  92 #define __ISREL_DEF(rel, op, type) \
  93 static __inline int __is##rel(type __x, type __y) \
  94 { return !isunordered(__x,__y) && __x op __y; }
  95
  96 __ISREL_DEF(lessf, <, float_t)
  97 __ISREL_DEF(less, <, double_t)
  98 __ISREL_DEF(lessl, <, long double)
  99 __ISREL_DEF(lessequalf, <=, float_t)
 100 __ISREL_DEF(lessequal, <=, double_t)
 101 __ISREL_DEF(lessequall, <=, long double)
 102 __ISREL_DEF(lessgreaterf, !=, float_t)
 103 __ISREL_DEF(lessgreater, !=, double_t)
 104 __ISREL_DEF(lessgreaterl, !=, long double)
 105 __ISREL_DEF(greaterf, >, float_t)
 106 __ISREL_DEF(greater, >, double_t)
 107 __ISREL_DEF(greaterl, >, long double)
 108 __ISREL_DEF(greaterequalf, >=, float_t)
 109 __ISREL_DEF(greaterequal, >=, double_t)
 110 __ISREL_DEF(greaterequall, >=, long double)
 111
 112 #define __tg_pred_2(x, y, p) ( \
 113         sizeof((x)+(y)) == sizeof(float) ? p##f(x, y) : \
 114         sizeof((x)+(y)) == sizeof(double) ? p(x, y) : \
 115         p##l(x, y) )
 116
 117 #define isless(x, y)            __tg_pred_2(x, y, __isless)
 118 #define islessequal(x, y)       __tg_pred_2(x, y, __islessequal)
 119 #define islessgreater(x, y)     __tg_pred_2(x, y, __islessgreater)
 120 #define isgreater(x, y)         __tg_pred_2(x, y, __isgreater)
 121 #define isgreaterequal(x, y)    __tg_pred_2(x, y, __isgreaterequal)
 122
 123 double      acos(double);
 124 float       acosf(float);
 125 long double acosl(long double);
 126
 127 double      acosh(double);
 128 float       acoshf(float);
 129 long double acoshl(long double);
 130
 131 double      asin(double);
 132 float       asinf(float);
 133 long double asinl(long double);
 134
 135 double      asinh(double);
 136 float       asinhf(float);
 137 long double asinhl(long double);
 138
 139 double      atan(double);
 140 float       atanf(float);
 141 long double atanl(long double);
 142
 143 double      atan2(double, double);
 144 float       atan2f(float, float);
 145 long double atan2l(long double, long double);
 146
 147 double      atanh(double);
 148 float       atanhf(float);
 149 long double atanhl(long double);
 150
 151 double      cbrt(double);
 152 float       cbrtf(float);
 153 long double cbrtl(long double);
 154
 155 double      ceil(double);
 156 float       ceilf(float);
 157 long double ceill(long double);
 158
 159 double      copysign(double, double);
 160 float       copysignf(float, float);
 161 long double copysignl(long double, long double);
 162
 163 double      cos(double);
 164 float       cosf(float);
 165 long double cosl(long double);
 166
 167 double      cosh(double);
 168 float       coshf(float);
 169 long double coshl(long double);
 170
 171 double      erf(double);
 172 float       erff(float);
 173 long double erfl(long double);
 174
 175 double      erfc(double);
 176 float       erfcf(float);
 177 long double erfcl(long double);
 178
 179 double      exp(double);
 180 float       expf(float);
 181 long double expl(long double);
 182
 183 double      exp2(double);
 184 float       exp2f(float);
 185 long double exp2l(long double);
 186
 187 double      expm1(double);
 188 float       expm1f(float);
 189 long double expm1l(long double);
 190
 191 double      fabs(double);
 192 float       fabsf(float);
 193 long double fabsl(long double);
 194
 195 double      fdim(double, double);
 196 float       fdimf(float, float);
 197 long double fdiml(long double, long double);
 198
 199 double      floor(double);
 200 float       floorf(float);
 201 long double floorl(long double);
 202
 203 double      fma(double, double, double);
 204 float       fmaf(float, float, float);
 205 long double fmal(long double, long double, long double);
 206
 207 double      fmax(double, double);
 208 float       fmaxf(float, float);
 209 long double fmaxl(long double, long double);
 210
 211 double      fmin(double, double);
 212 float       fminf(float, float);
 213 long double fminl(long double, long double);
 214
 215 double      fmod(double, double);
 216 float       fmodf(float, float);
 217 long double fmodl(long double, long double);
 218
 219 double      frexp(double, int *);
 220 float       frexpf(float, int *);
 221 long double frexpl(long double, int *);
 222
 223 double      hypot(double, double);
 224 float       hypotf(float, float);
 225 long double hypotl(long double, long double);
 226
 227 int         ilogb(double);
 228 int         ilogbf(float);
 229 int         ilogbl(long double);
 230
 231 double      ldexp(double, int);
 232 float       ldexpf(float, int);
 233 long double ldexpl(long double, int);
 234
 235 double      lgamma(double);
 236 float       lgammaf(float);
 237 long double lgammal(long double);
 238
 239 long long   llrint(double);
 240 long long   llrintf(float);
 241 long long   llrintl(long double);
 242
 243 long long   llround(double);
 244 long long   llroundf(float);
 245 long long   llroundl(long double);
 246
 247 double      log(double);
 248 float       logf(float);
 249 long double logl(long double);
 250
 251 double      log10(double);
 252 float       log10f(float);
 253 long double log10l(long double);
 254
 255 double      log1p(double);
 256 float       log1pf(float);
 257 long double log1pl(long double);
 258
 259 double      log2(double);
 260 float       log2f(float);
 261 long double log2l(long double);
 262
 263 double      logb(double);
 264 float       logbf(float);
 265 long double logbl(long double);
 266
 267 long        lrint(double);
 268 long        lrintf(float);
 269 long        lrintl(long double);
 270
 271 long        lround(double);
 272 long        lroundf(float);
 273 long        lroundl(long double);
 274
 275 double      modf(double, double *);
 276 float       modff(float, float *);
 277 long double modfl(long double, long double *);
 278
 279 double      nan(const char *);
 280 float       nanf(const char *);
 281 long double nanl(const char *);
 282
 283 double      nearbyint(double);
 284 float       nearbyintf(float);
 285 long double nearbyintl(long double);
 286
 287 double      nextafter(double, double);
 288 float       nextafterf(float, float);
 289 long double nextafterl(long double, long double);
 290
 291 double      nexttoward(double, long double);
 292 float       nexttowardf(float, long double);
 293 long double nexttowardl(long double, long double);
 294
 295 double      pow(double, double);
 296 float       powf(float, float);
 297 long double powl(long double, long double);
 298
 299 double      remainder(double, double);
 300 float       remainderf(float, float);
 301 long double remainderl(long double, long double);
 302
 303 double      remquo(double, double, int *);
 304 float       remquof(float, float, int *);
 305 long double remquol(long double, long double, int *);
 306
 307 double      rint(double);
 308 float       rintf(float);
 309 long double rintl(long double);
 310
 311 double      round(double);
 312 float       roundf(float);
 313 long double roundl(long double);
 314
 315 double      scalbln(double, long);
 316 float       scalblnf(float, long);
 317 long double scalblnl(long double, long);
 318
 319 double      scalbn(double, int);
 320 float       scalbnf(float, int);
 321 long double scalbnl(long double, int);
 322
 323 double      sin(double);
 324 float       sinf(float);
 325 long double sinl(long double);
 326
 327 double      sinh(double);
 328 float       sinhf(float);
 329 long double sinhl(long double);
 330
 331 double      sqrt(double);
 332 float       sqrtf(float);
 333 long double sqrtl(long double);
 334
 335 double      tan(double);
 336 float       tanf(float);
 337 long double tanl(long double);
 338
 339 double      tanh(double);
 340 float       tanhf(float);
 341 long double tanhl(long double);
 342
 343 double      tgamma(double);
 344 float       tgammaf(float);
 345 long double tgammal(long double);
 346
 347 double      trunc(double);
 348 float       truncf(float);
 349 long double truncl(long double);
 350
 351
 352 #if defined(_XOPEN_SOURCE) || defined(_BSD_SOURCE)
 353 #undef  MAXFLOAT
 354 #define MAXFLOAT        3.40282346638528859812e+38F
 355 #endif
 356
 357 #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 358 #define M_E             2.7182818284590452354   /* e */
 359 #define M_LOG2E         1.4426950408889634074   /* log_2 e */
 360 #define M_LOG10E        0.43429448190325182765  /* log_10 e */
 361 #define M_LN2           0.69314718055994530942  /* log_e 2 */
 362 #define M_LN10          2.30258509299404568402  /* log_e 10 */
 363 #define M_PI            3.14159265358979323846  /* pi */
 364 #define M_PI_2          1.57079632679489661923  /* pi/2 */
 365 #define M_PI_4          0.78539816339744830962  /* pi/4 */
 366 #define M_1_PI          0.31830988618379067154  /* 1/pi */
 367 #define M_2_PI          0.63661977236758134308  /* 2/pi */
 368 #define M_2_SQRTPI      1.12837916709551257390  /* 2/sqrt(pi) */
 369 #define M_SQRT2         1.41421356237309504880  /* sqrt(2) */
 370 #define M_SQRT1_2       0.70710678118654752440  /* 1/sqrt(2) */
 371
 372 extern int signgam;
 373
 374 double      j0(double);
 375 double      j1(double);
 376 double      jn(int, double);
 377
 378 double      y0(double);
 379 double      y1(double);
 380 double      yn(int, double);
 381 #endif
 382
 383 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 384 #define HUGE            3.40282346638528859812e+38F
 385
 386 double      drem(double, double);
 387 float       dremf(float, float);
 388
 389 int         finite(double);
 390 int         finitef(float);
 391
 392 double      scalb(double, double);
 393 float       scalbf(float, float);
 394
 395 double      significand(double);
 396 float       significandf(float);
 397
 398 double      lgamma_r(double, int*);
 399 float       lgammaf_r(float, int*);
 400
 401 float       j0f(float);
 402 float       j1f(float);
 403 float       jnf(int, float);
 404
 405 float       y0f(float);
 406 float       y1f(float);
 407 float       ynf(int, float);
 408 #endif
 409
 410 #ifdef _GNU_SOURCE
 411 long double lgammal_r(long double, int*);
 412
 413 void        sincos(double, double*, double*);
 414 void        sincosf(float, float*, float*);
 415 void        sincosl(long double, long double*, long double*);
 416
 417 double      exp10(double);
 418 float       exp10f(float);
 419 long double exp10l(long double);
 420
 421 double      pow10(double);
 422 float       pow10f(float);
 423 long double pow10l(long double);
 424 #endif
 425
 426 #ifdef __cplusplus
 427 }
 428 #endif
 429
 430 #endif