sysdeps/ieee754/k_standard.c

   1 /* @(#)k_standard.c 5.1 93/09/24 */
   2 /*
   3  * ====================================================
   4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   5  *
   6  * Developed at SunPro, a Sun Microsystems, Inc. business.
   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 #if defined(LIBM_SCCS) && !defined(lint)
  14 static char rcsid[] = "$NetBSD: k_standard.c,v 1.6 1995/05/10 20:46:35 jtc Exp $";
  15 #endif
  16
  17 #include "math.h"
  18 #include "math_private.h"
  19 #include <errno.h>
  20
  21 #include <assert.h>
  22
  23 #ifndef _USE_WRITE
  24 #include <stdio.h>                      /* fputs(), stderr */
  25 #define WRITE2(u,v)     fputs(u, stderr)
  26 #else   /* !defined(_USE_WRITE) */
  27 #include <unistd.h>                     /* write */
  28 #define WRITE2(u,v)     write(2, u, v)
  29 #undef fflush
  30 #endif  /* !defined(_USE_WRITE) */
  31
  32 /* XXX gcc versions until now don't delay the 0.0/0.0 division until
  33    runtime but produce NaN at copile time.  This is wrong since the
  34    exceptions are not set correctly.  */
  35 #if 0 && defined __STDC__
  36 static const double zero = 0.0; /* used as const */
  37 #else
  38 static double zero = 0.0;       /* used as const */
  39 #endif
  40
  41 /*
  42  * Standard conformance (non-IEEE) on exception cases.
  43  * Mapping:
  44  *      1 -- acos(|x|>1)
  45  *      2 -- asin(|x|>1)
  46  *      3 -- atan2(+-0,+-0)
  47  *      4 -- hypot overflow
  48  *      5 -- cosh overflow
  49  *      6 -- exp overflow
  50  *      7 -- exp underflow
  51  *      8 -- y0(0)
  52  *      9 -- y0(-ve)
  53  *      10-- y1(0)
  54  *      11-- y1(-ve)
  55  *      12-- yn(0)
  56  *      13-- yn(-ve)
  57  *      14-- lgamma(finite) overflow
  58  *      15-- lgamma(-integer)
  59  *      16-- log(0)
  60  *      17-- log(x<0)
  61  *      18-- log10(0)
  62  *      19-- log10(x<0)
  63  *      20-- pow(0.0,0.0)
  64  *      21-- pow(x,y) overflow
  65  *      22-- pow(x,y) underflow
  66  *      23-- pow(0,negative)
  67  *      24-- pow(neg,non-integral)
  68  *      25-- sinh(finite) overflow
  69  *      26-- sqrt(negative)
  70  *      27-- fmod(x,0)
  71  *      28-- remainder(x,0)
  72  *      29-- acosh(x<1)
  73  *      30-- atanh(|x|>1)
  74  *      31-- atanh(|x|=1)
  75  *      32-- scalb overflow
  76  *      33-- scalb underflow
  77  *      34-- j0(|x|>X_TLOSS)
  78  *      35-- y0(x>X_TLOSS)
  79  *      36-- j1(|x|>X_TLOSS)
  80  *      37-- y1(x>X_TLOSS)
  81  *      38-- jn(|x|>X_TLOSS, n)
  82  *      39-- yn(x>X_TLOSS, n)
  83  *      40-- tgamma(finite) overflow
  84  *      41-- tgamma(-integer)
  85  *      42-- pow(NaN,0.0)
  86  *      43-- +0**neg
  87  *      44-- exp2 overflow
  88  *      45-- exp2 underflow
  89  *      46-- exp10 overflow
  90  *      47-- exp10 underflow
  91  *      48-- log2(0)
  92  *      49-- log2(x<0)
  93  *      50-- tgamma(+-0)
  94  */
  95
  96
  97 #ifdef __STDC__
  98         double __kernel_standard(double x, double y, int type)
  99 #else
 100         double __kernel_standard(x,y,type)
 101         double x,y; int type;
 102 #endif
 103 {
 104         struct exception exc;
 105 #ifndef HUGE_VAL        /* this is the only routine that uses HUGE_VAL */
 106 #define HUGE_VAL inf
 107         double inf = 0.0;
 108
 109         SET_HIGH_WORD(inf,0x7ff00000);  /* set inf to infinite */
 110 #endif
 111
 112 #ifdef _USE_WRITE
 113         (void) fflush(stdout);
 114 #endif
 115         exc.arg1 = x;
 116         exc.arg2 = y;
 117         switch(type) {
 118             case 1:
 119             case 101:
 120             case 201:
 121                 /* acos(|x|>1) */
 122                 exc.type = DOMAIN;
 123                 exc.name = type < 100 ? "acos" : (type < 200
 124                                                   ? "acosf" : "acosl");;
 125                 if (_LIB_VERSION == _SVID_)
 126                   exc.retval = HUGE;
 127                 else
 128                   exc.retval = NAN;
 129                 if (_LIB_VERSION == _POSIX_)
 130                   __set_errno (EDOM);
 131                 else if (!matherr(&exc)) {
 132                   if(_LIB_VERSION == _SVID_) {
 133                     (void) WRITE2("acos: DOMAIN error\n", 19);
 134                   }
 135                   __set_errno (EDOM);
 136                 }
 137                 break;
 138             case 2:
 139             case 102:
 140             case 202:
 141                 /* asin(|x|>1) */
 142                 exc.type = DOMAIN;
 143                 exc.name = type < 100 ? "asin" : (type < 200
 144                                                   ? "asinf" : "asinl");
 145                 if (_LIB_VERSION == _SVID_)
 146                   exc.retval = HUGE;
 147                 else
 148                   exc.retval = NAN;
 149                 if(_LIB_VERSION == _POSIX_)
 150                   __set_errno (EDOM);
 151                 else if (!matherr(&exc)) {
 152                   if(_LIB_VERSION == _SVID_) {
 153                         (void) WRITE2("asin: DOMAIN error\n", 19);
 154                   }
 155                   __set_errno (EDOM);
 156                 }
 157                 break;
 158             case 3:
 159             case 103:
 160             case 203:
 161                 /* atan2(+-0,+-0) */
 162                 exc.arg1 = y;
 163                 exc.arg2 = x;
 164                 exc.type = DOMAIN;
 165                 exc.name = type < 100 ? "atan2" : (type < 200
 166                                                    ? "atan2f" : "atan2l");
 167                 assert (_LIB_VERSION == _SVID_);
 168                 exc.retval = HUGE;
 169                 if(_LIB_VERSION == _POSIX_)
 170                   __set_errno (EDOM);
 171                 else if (!matherr(&exc)) {
 172                   if(_LIB_VERSION == _SVID_) {
 173                         (void) WRITE2("atan2: DOMAIN error\n", 20);
 174                       }
 175                   __set_errno (EDOM);
 176                 }
 177                 break;
 178             case 4:
 179             case 104:
 180             case 204:
 181                 /* hypot(finite,finite) overflow */
 182                 exc.type = OVERFLOW;
 183                 exc.name = type < 100 ? "hypot" : (type < 200
 184                                                    ? "hypotf" : "hypotl");
 185                 if (_LIB_VERSION == _SVID_)
 186                   exc.retval = HUGE;
 187                 else
 188                   exc.retval = HUGE_VAL;
 189                 if (_LIB_VERSION == _POSIX_)
 190                   __set_errno (ERANGE);
 191                 else if (!matherr(&exc)) {
 192                         __set_errno (ERANGE);
 193                 }
 194                 break;
 195             case 5:
 196             case 105:
 197             case 205:
 198                 /* cosh(finite) overflow */
 199                 exc.type = OVERFLOW;
 200                 exc.name = type < 100 ? "cosh" : (type < 200
 201                                                   ? "coshf" : "coshl");
 202                 if (_LIB_VERSION == _SVID_)
 203                   exc.retval = HUGE;
 204                 else
 205                   exc.retval = HUGE_VAL;
 206                 if (_LIB_VERSION == _POSIX_)
 207                   __set_errno (ERANGE);
 208                 else if (!matherr(&exc)) {
 209                         __set_errno (ERANGE);
 210                 }
 211                 break;
 212             case 6:
 213             case 106:
 214             case 206:
 215                 /* exp(finite) overflow */
 216                 exc.type = OVERFLOW;
 217                 exc.name = type < 100 ? "exp" : (type < 200
 218                                                  ? "expf" : "expl");
 219                 if (_LIB_VERSION == _SVID_)
 220                   exc.retval = HUGE;
 221                 else
 222                   exc.retval = HUGE_VAL;
 223                 if (_LIB_VERSION == _POSIX_)
 224                   __set_errno (ERANGE);
 225                 else if (!matherr(&exc)) {
 226                         __set_errno (ERANGE);
 227                 }
 228                 break;
 229             case 7:
 230             case 107:
 231             case 207:
 232                 /* exp(finite) underflow */
 233                 exc.type = UNDERFLOW;
 234                 exc.name = type < 100 ? "exp" : (type < 200
 235                                                  ? "expf" : "expl");
 236                 exc.retval = zero;
 237                 if (_LIB_VERSION == _POSIX_)
 238                   __set_errno (ERANGE);
 239                 else if (!matherr(&exc)) {
 240                         __set_errno (ERANGE);
 241                 }
 242                 break;
 243             case 8:
 244             case 108:
 245             case 208:
 246                 /* y0(0) = -inf */
 247                 exc.type = DOMAIN;      /* should be SING for IEEE */
 248                 exc.name = type < 100 ? "y0" : (type < 200 ? "y0f" : "y0l");
 249                 if (_LIB_VERSION == _SVID_)
 250                   exc.retval = -HUGE;
 251                 else
 252                   exc.retval = -HUGE_VAL;
 253                 if (_LIB_VERSION == _POSIX_)
 254                   __set_errno (EDOM);
 255                 else if (!matherr(&exc)) {
 256                   if (_LIB_VERSION == _SVID_) {
 257                         (void) WRITE2("y0: DOMAIN error\n", 17);
 258                       }
 259                   __set_errno (EDOM);
 260                 }
 261                 break;
 262             case 9:
 263             case 109:
 264             case 209:
 265                 /* y0(x<0) = NaN */
 266                 exc.type = DOMAIN;
 267                 exc.name = type < 100 ? "y0" : (type < 200 ? "y0f" : "y0l");
 268                 if (_LIB_VERSION == _SVID_)
 269                   exc.retval = -HUGE;
 270                 else
 271                   exc.retval = -HUGE_VAL;
 272                 if (_LIB_VERSION == _POSIX_)
 273                   __set_errno (EDOM);
 274                 else if (!matherr(&exc)) {
 275                   if (_LIB_VERSION == _SVID_) {
 276                         (void) WRITE2("y0: DOMAIN error\n", 17);
 277                       }
 278                   __set_errno (EDOM);
 279                 }
 280                 break;
 281             case 10:
 282             case 110:
 283             case 210:
 284                 /* y1(0) = -inf */
 285                 exc.type = DOMAIN;      /* should be SING for IEEE */
 286                 exc.name = type < 100 ? "y1" : (type < 200 ? "y1f" : "y1l");
 287                 if (_LIB_VERSION == _SVID_)
 288                   exc.retval = -HUGE;
 289                 else
 290                   exc.retval = -HUGE_VAL;
 291                 if (_LIB_VERSION == _POSIX_)
 292                   __set_errno (EDOM);
 293                 else if (!matherr(&exc)) {
 294                   if (_LIB_VERSION == _SVID_) {
 295                         (void) WRITE2("y1: DOMAIN error\n", 17);
 296                       }
 297                   __set_errno (EDOM);
 298                 }
 299                 break;
 300             case 11:
 301             case 111:
 302             case 211:
 303                 /* y1(x<0) = NaN */
 304                 exc.type = DOMAIN;
 305                 exc.name = type < 100 ? "y1" : (type < 200 ? "y1f" : "y1l");
 306                 if (_LIB_VERSION == _SVID_)
 307                   exc.retval = -HUGE;
 308                 else
 309                   exc.retval = -HUGE_VAL;
 310                 if (_LIB_VERSION == _POSIX_)
 311                   __set_errno (EDOM);
 312                 else if (!matherr(&exc)) {
 313                   if (_LIB_VERSION == _SVID_) {
 314                         (void) WRITE2("y1: DOMAIN error\n", 17);
 315                       }
 316                   __set_errno (EDOM);
 317                 }
 318                 break;
 319             case 12:
 320             case 112:
 321             case 212:
 322                 /* yn(n,0) = -inf */
 323                 exc.type = DOMAIN;      /* should be SING for IEEE */
 324                 exc.name = type < 100 ? "yn" : (type < 200 ? "ynf" : "ynl");
 325                 if (_LIB_VERSION == _SVID_)
 326                   exc.retval = -HUGE;
 327                 else
 328                   exc.retval = -HUGE_VAL;
 329                 if (_LIB_VERSION == _POSIX_)
 330                   __set_errno (EDOM);
 331                 else if (!matherr(&exc)) {
 332                   if (_LIB_VERSION == _SVID_) {
 333                         (void) WRITE2("yn: DOMAIN error\n", 17);
 334                       }
 335                   __set_errno (EDOM);
 336                 }
 337                 break;
 338             case 13:
 339             case 113:
 340             case 213:
 341                 /* yn(x<0) = NaN */
 342                 exc.type = DOMAIN;
 343                 exc.name = type < 100 ? "yn" : (type < 200 ? "ynf" : "ynl");
 344                 if (_LIB_VERSION == _SVID_)
 345                   exc.retval = -HUGE;
 346                 else
 347                   exc.retval = -HUGE_VAL;
 348                 if (_LIB_VERSION == _POSIX_)
 349                   __set_errno (EDOM);
 350                 else if (!matherr(&exc)) {
 351                   if (_LIB_VERSION == _SVID_) {
 352                         (void) WRITE2("yn: DOMAIN error\n", 17);
 353                       }
 354                   __set_errno (EDOM);
 355                 }
 356                 break;
 357             case 14:
 358             case 114:
 359             case 214:
 360                 /* lgamma(finite) overflow */
 361                 exc.type = OVERFLOW;
 362                 exc.name = type < 100 ? "lgamma" : (type < 200
 363                                                     ? "lgammaf" : "lgammal");
 364                 if (_LIB_VERSION == _SVID_)
 365                   exc.retval = HUGE;
 366                 else
 367                   exc.retval = HUGE_VAL;
 368                 if (_LIB_VERSION == _POSIX_)
 369                         __set_errno (ERANGE);
 370                 else if (!matherr(&exc)) {
 371                         __set_errno (ERANGE);
 372                 }
 373                 break;
 374             case 15:
 375             case 115:
 376             case 215:
 377                 /* lgamma(-integer) or lgamma(0) */
 378                 exc.type = SING;
 379                 exc.name = type < 100 ? "lgamma" : (type < 200
 380                                                     ? "lgammaf" : "lgammal");
 381                 if (_LIB_VERSION == _SVID_)
 382                   exc.retval = HUGE;
 383                 else
 384                   exc.retval = HUGE_VAL;
 385                 if (_LIB_VERSION == _POSIX_)
 386                   __set_errno (ERANGE);
 387                 else if (!matherr(&exc)) {
 388                   if (_LIB_VERSION == _SVID_) {
 389                         (void) WRITE2("lgamma: SING error\n", 19);
 390                       }
 391                   __set_errno (EDOM);
 392                 }
 393                 break;
 394             case 16:
 395             case 116:
 396             case 216:
 397                 /* log(0) */
 398                 exc.type = SING;
 399                 exc.name = type < 100 ? "log" : (type < 200 ? "logf" : "logl");
 400                 if (_LIB_VERSION == _SVID_)
 401                   exc.retval = -HUGE;
 402                 else
 403                   exc.retval = -HUGE_VAL;
 404                 if (_LIB_VERSION == _POSIX_)
 405                   __set_errno (ERANGE);
 406                 else if (!matherr(&exc)) {
 407                   if (_LIB_VERSION == _SVID_) {
 408                         (void) WRITE2("log: SING error\n", 16);
 409                       }
 410                   __set_errno (EDOM);
 411                 }
 412                 break;
 413             case 17:
 414             case 117:
 415             case 217:
 416                 /* log(x<0) */
 417                 exc.type = DOMAIN;
 418                 exc.name = type < 100 ? "log" : (type < 200 ? "logf" : "logl");
 419                 if (_LIB_VERSION == _SVID_)
 420                   exc.retval = -HUGE;
 421                 else
 422                   exc.retval = NAN;
 423                 if (_LIB_VERSION == _POSIX_)
 424                   __set_errno (EDOM);
 425                 else if (!matherr(&exc)) {
 426                   if (_LIB_VERSION == _SVID_) {
 427                         (void) WRITE2("log: DOMAIN error\n", 18);
 428                       }
 429                   __set_errno (EDOM);
 430                 }
 431                 break;
 432             case 18:
 433             case 118:
 434             case 218:
 435                 /* log10(0) */
 436                 exc.type = SING;
 437                 exc.name = type < 100 ? "log10" : (type < 200
 438                                                    ? "log10f" : "log10l");
 439                 if (_LIB_VERSION == _SVID_)
 440                   exc.retval = -HUGE;
 441                 else
 442                   exc.retval = -HUGE_VAL;
 443                 if (_LIB_VERSION == _POSIX_)
 444                   __set_errno (ERANGE);
 445                 else if (!matherr(&exc)) {
 446                   if (_LIB_VERSION == _SVID_) {
 447                         (void) WRITE2("log10: SING error\n", 18);
 448                       }
 449                   __set_errno (EDOM);
 450                 }
 451                 break;
 452             case 19:
 453             case 119:
 454             case 219:
 455                 /* log10(x<0) */
 456                 exc.type = DOMAIN;
 457                 exc.name = type < 100 ? "log10" : (type < 200
 458                                                    ? "log10f" : "log10l");
 459                 if (_LIB_VERSION == _SVID_)
 460                   exc.retval = -HUGE;
 461                 else
 462                   exc.retval = NAN;
 463                 if (_LIB_VERSION == _POSIX_)
 464                   __set_errno (EDOM);
 465                 else if (!matherr(&exc)) {
 466                   if (_LIB_VERSION == _SVID_) {
 467                         (void) WRITE2("log10: DOMAIN error\n", 20);
 468                       }
 469                   __set_errno (EDOM);
 470                 }
 471                 break;
 472             case 20:
 473             case 120:
 474             case 220:
 475                 /* pow(0.0,0.0) */
 476                 /* error only if _LIB_VERSION == _SVID_ */
 477                 exc.type = DOMAIN;
 478                 exc.name = type < 100 ? "pow" : (type < 200 ? "powf" : "powl");
 479                 exc.retval = zero;
 480                 if (_LIB_VERSION != _SVID_) exc.retval = 1.0;
 481                 else if (!matherr(&exc)) {
 482                         (void) WRITE2("pow(0,0): DOMAIN error\n", 23);
 483                         __set_errno (EDOM);
 484                 }
 485                 break;
 486             case 21:
 487             case 121:
 488             case 221:
 489                 /* pow(x,y) overflow */
 490                 exc.type = OVERFLOW;
 491                 exc.name = type < 100 ? "pow" : (type < 200 ? "powf" : "powl");
 492                 if (_LIB_VERSION == _SVID_) {
 493                   exc.retval = HUGE;
 494                   y *= 0.5;
 495                   if(x<zero&&__rint(y)!=y) exc.retval = -HUGE;
 496                 } else {
 497                   exc.retval = HUGE_VAL;
 498                   y *= 0.5;
 499                   if(x<zero&&__rint(y)!=y) exc.retval = -HUGE_VAL;
 500                 }
 501                 if (_LIB_VERSION == _POSIX_)
 502                   __set_errno (ERANGE);
 503                 else if (!matherr(&exc)) {
 504                         __set_errno (ERANGE);
 505                 }
 506                 break;
 507             case 22:
 508             case 122:
 509             case 222:
 510                 /* pow(x,y) underflow */
 511                 exc.type = UNDERFLOW;
 512                 exc.name = type < 100 ? "pow" : (type < 200 ? "powf" : "powl");
 513                 exc.retval =  zero;
 514                 if (_LIB_VERSION == _POSIX_)
 515                   __set_errno (ERANGE);
 516                 else if (!matherr(&exc)) {
 517                         __set_errno (ERANGE);
 518                 }
 519                 break;
 520             case 23:
 521             case 123:
 522             case 223:
 523                 /* -0**neg */
 524                 exc.type = DOMAIN;
 525                 exc.name = type < 100 ? "pow" : (type < 200 ? "powf" : "powl");
 526                 if (_LIB_VERSION == _SVID_)
 527                   exc.retval = zero;
 528                 else
 529                   exc.retval = -HUGE_VAL;
 530                 if (_LIB_VERSION == _POSIX_)
 531                   __set_errno (ERANGE);
 532                 else if (!matherr(&exc)) {
 533                   if (_LIB_VERSION == _SVID_) {
 534                         (void) WRITE2("pow(0,neg): DOMAIN error\n", 25);
 535                       }
 536                   __set_errno (EDOM);
 537                 }
 538                 break;
 539             case 43:
 540             case 143:
 541             case 243:
 542                 /* +0**neg */
 543                 exc.type = DOMAIN;
 544                 exc.name = type < 100 ? "pow" : (type < 200 ? "powf" : "powl");
 545                 if (_LIB_VERSION == _SVID_)
 546                   exc.retval = zero;
 547                 else
 548                   exc.retval = HUGE_VAL;
 549                 if (_LIB_VERSION == _POSIX_)
 550                   __set_errno (ERANGE);
 551                 else if (!matherr(&exc)) {
 552                   if (_LIB_VERSION == _SVID_) {
 553                         (void) WRITE2("pow(0,neg): DOMAIN error\n", 25);
 554                       }
 555                   __set_errno (EDOM);
 556                 }
 557                 break;
 558             case 24:
 559             case 124:
 560             case 224:
 561                 /* neg**non-integral */
 562                 exc.type = DOMAIN;
 563                 exc.name = type < 100 ? "pow" : (type < 200 ? "powf" : "powl");
 564                 if (_LIB_VERSION == _SVID_)
 565                     exc.retval = zero;
 566                 else
 567                     exc.retval = zero/zero;     /* X/Open allow NaN */
 568                 if (_LIB_VERSION == _POSIX_)
 569                    __set_errno (EDOM);
 570                 else if (!matherr(&exc)) {
 571                   if (_LIB_VERSION == _SVID_) {
 572                         (void) WRITE2("neg**non-integral: DOMAIN error\n", 32);
 573                       }
 574                   __set_errno (EDOM);
 575                 }
 576                 break;
 577             case 25:
 578             case 125:
 579             case 225:
 580                 /* sinh(finite) overflow */
 581                 exc.type = OVERFLOW;
 582                 exc.name = type < 100 ? "sinh" : (type < 200
 583                                                   ? "sinhf" : "sinhl");
 584                 if (_LIB_VERSION == _SVID_)
 585                   exc.retval = ( (x>zero) ? HUGE : -HUGE);
 586                 else
 587                   exc.retval = ( (x>zero) ? HUGE_VAL : -HUGE_VAL);
 588                 if (_LIB_VERSION == _POSIX_)
 589                   __set_errno (ERANGE);
 590                 else if (!matherr(&exc)) {
 591                         __set_errno (ERANGE);
 592                 }
 593                 break;
 594             case 26:
 595             case 126:
 596             case 226:
 597                 /* sqrt(x<0) */
 598                 exc.type = DOMAIN;
 599                 exc.name = type < 100 ? "sqrt" : (type < 200
 600                                                   ? "sqrtf" : "sqrtl");
 601                 if (_LIB_VERSION == _SVID_)
 602                   exc.retval = zero;
 603                 else
 604                   exc.retval = zero/zero;
 605                 if (_LIB_VERSION == _POSIX_)
 606                   __set_errno (EDOM);
 607                 else if (!matherr(&exc)) {
 608                   if (_LIB_VERSION == _SVID_) {
 609                         (void) WRITE2("sqrt: DOMAIN error\n", 19);
 610                       }
 611                   __set_errno (EDOM);
 612                 }
 613                 break;
 614             case 27:
 615             case 127:
 616             case 227:
 617                 /* fmod(x,0) */
 618                 exc.type = DOMAIN;
 619                 exc.name = type < 100 ? "fmod" : (type < 200
 620                                                   ? "fmodf" : "fmodl");
 621                 if (_LIB_VERSION == _SVID_)
 622                     exc.retval = x;
 623                 else
 624                     exc.retval = zero/zero;
 625                 if (_LIB_VERSION == _POSIX_)
 626                   __set_errno (EDOM);
 627                 else if (!matherr(&exc)) {
 628                   if (_LIB_VERSION == _SVID_) {
 629                     (void) WRITE2("fmod:  DOMAIN error\n", 20);
 630                   }
 631                   __set_errno (EDOM);
 632                 }
 633                 break;
 634             case 28:
 635             case 128:
 636             case 228:
 637                 /* remainder(x,0) */
 638                 exc.type = DOMAIN;
 639                 exc.name = type < 100 ? "remainder" : (type < 200
 640                                                        ? "remainderf"
 641                                                        : "remainderl");
 642                 exc.retval = zero/zero;
 643                 if (_LIB_VERSION == _POSIX_)
 644                   __set_errno (EDOM);
 645                 else if (!matherr(&exc)) {
 646                   if (_LIB_VERSION == _SVID_) {
 647                     (void) WRITE2("remainder: DOMAIN error\n", 24);
 648                   }
 649                   __set_errno (EDOM);
 650                 }
 651                 break;
 652             case 29:
 653             case 129:
 654             case 229:
 655                 /* acosh(x<1) */
 656                 exc.type = DOMAIN;
 657                 exc.name = type < 100 ? "acosh" : (type < 200
 658                                                    ? "acoshf" : "acoshl");
 659                 exc.retval = zero/zero;
 660                 if (_LIB_VERSION == _POSIX_)
 661                   __set_errno (EDOM);
 662                 else if (!matherr(&exc)) {
 663                   if (_LIB_VERSION == _SVID_) {
 664                     (void) WRITE2("acosh: DOMAIN error\n", 20);
 665                   }
 666                   __set_errno (EDOM);
 667                 }
 668                 break;
 669             case 30:
 670             case 130:
 671             case 230:
 672                 /* atanh(|x|>1) */
 673                 exc.type = DOMAIN;
 674                 exc.name = type < 100 ? "atanh" : (type < 200
 675                                                    ? "atanhf" : "atanhl");
 676                 exc.retval = zero/zero;
 677                 if (_LIB_VERSION == _POSIX_)
 678                   __set_errno (EDOM);
 679                 else if (!matherr(&exc)) {
 680                   if (_LIB_VERSION == _SVID_) {
 681                     (void) WRITE2("atanh: DOMAIN error\n", 20);
 682                   }
 683                   __set_errno (EDOM);
 684                 }
 685                 break;
 686             case 31:
 687             case 131:
 688             case 231:
 689                 /* atanh(|x|=1) */
 690                 exc.type = SING;
 691                 exc.name = type < 100 ? "atanh" : (type < 200
 692                                                    ? "atanhf" : "atanhl");
 693                 exc.retval = x/zero;    /* sign(x)*inf */
 694                 if (_LIB_VERSION == _POSIX_)
 695                   __set_errno (ERANGE);
 696                 else if (!matherr(&exc)) {
 697                   if (_LIB_VERSION == _SVID_) {
 698                     (void) WRITE2("atanh: SING error\n", 18);
 699                   }
 700                   __set_errno (EDOM);
 701                 }
 702                 break;
 703             case 32:
 704             case 132:
 705             case 232:
 706                 /* scalb overflow; SVID also returns +-HUGE_VAL */
 707                 exc.type = OVERFLOW;
 708                 exc.name = type < 100 ? "scalb" : (type < 200
 709                                                    ? "scalbf" : "scalbl");
 710                 exc.retval = x > zero ? HUGE_VAL : -HUGE_VAL;
 711                 if (_LIB_VERSION == _POSIX_)
 712                   __set_errno (ERANGE);
 713                 else if (!matherr(&exc)) {
 714                         __set_errno (ERANGE);
 715                 }
 716                 break;
 717             case 33:
 718             case 133:
 719             case 233:
 720                 /* scalb underflow */
 721                 exc.type = UNDERFLOW;
 722                 exc.name = type < 100 ? "scalb" : (type < 200
 723                                                    ? "scalbf" : "scalbl");
 724                 exc.retval = __copysign(zero,x);
 725                 if (_LIB_VERSION == _POSIX_)
 726                   __set_errno (ERANGE);
 727                 else if (!matherr(&exc)) {
 728                         __set_errno (ERANGE);
 729                 }
 730                 break;
 731             case 34:
 732             case 134:
 733             case 234:
 734                 /* j0(|x|>X_TLOSS) */
 735                 exc.type = TLOSS;
 736                 exc.name = type < 100 ? "j0" : (type < 200 ? "j0f" : "j0l");
 737                 exc.retval = zero;
 738                 if (_LIB_VERSION == _POSIX_)
 739                         __set_errno (ERANGE);
 740                 else if (!matherr(&exc)) {
 741                         if (_LIB_VERSION == _SVID_) {
 742                                 (void) WRITE2(exc.name, 2);
 743                                 (void) WRITE2(": TLOSS error\n", 14);
 744                         }
 745                         __set_errno (ERANGE);
 746                 }
 747                 break;
 748             case 35:
 749             case 135:
 750             case 235:
 751                 /* y0(x>X_TLOSS) */
 752                 exc.type = TLOSS;
 753                 exc.name = type < 100 ? "y0" : (type < 200 ? "y0f" : "y0l");
 754                 exc.retval = zero;
 755                 if (_LIB_VERSION == _POSIX_)
 756                         __set_errno (ERANGE);
 757                 else if (!matherr(&exc)) {
 758                         if (_LIB_VERSION == _SVID_) {
 759                                 (void) WRITE2(exc.name, 2);
 760                                 (void) WRITE2(": TLOSS error\n", 14);
 761                         }
 762                         __set_errno (ERANGE);
 763                 }
 764                 break;
 765             case 36:
 766             case 136:
 767             case 236:
 768                 /* j1(|x|>X_TLOSS) */
 769                 exc.type = TLOSS;
 770                 exc.name = type < 100 ? "j1" : (type < 200 ? "j1f" : "j1l");
 771                 exc.retval = zero;
 772                 if (_LIB_VERSION == _POSIX_)
 773                         __set_errno (ERANGE);
 774                 else if (!matherr(&exc)) {
 775                         if (_LIB_VERSION == _SVID_) {
 776                                 (void) WRITE2(exc.name, 2);
 777                                 (void) WRITE2(": TLOSS error\n", 14);
 778                         }
 779                         __set_errno (ERANGE);
 780                 }
 781                 break;
 782             case 37:
 783             case 137:
 784             case 237:
 785                 /* y1(x>X_TLOSS) */
 786                 exc.type = TLOSS;
 787                 exc.name = type < 100 ? "y1" : (type < 200 ? "y1f" : "y1l");
 788                 exc.retval = zero;
 789                 if (_LIB_VERSION == _POSIX_)
 790                         __set_errno (ERANGE);
 791                 else if (!matherr(&exc)) {
 792                         if (_LIB_VERSION == _SVID_) {
 793                                 (void) WRITE2(exc.name, 2);
 794                                 (void) WRITE2(": TLOSS error\n", 14);
 795                         }
 796                         __set_errno (ERANGE);
 797                 }
 798                 break;
 799             case 38:
 800             case 138:
 801             case 238:
 802                 /* jn(|x|>X_TLOSS) */
 803                 exc.type = TLOSS;
 804                 exc.name = type < 100 ? "jn" : (type < 200 ? "jnf" : "jnl");
 805                 exc.retval = zero;
 806                 if (_LIB_VERSION == _POSIX_)
 807                         __set_errno (ERANGE);
 808                 else if (!matherr(&exc)) {
 809                         if (_LIB_VERSION == _SVID_) {
 810                                 (void) WRITE2(exc.name, 2);
 811                                 (void) WRITE2(": TLOSS error\n", 14);
 812                         }
 813                         __set_errno (ERANGE);
 814                 }
 815                 break;
 816             case 39:
 817             case 139:
 818             case 239:
 819                 /* yn(x>X_TLOSS) */
 820                 exc.type = TLOSS;
 821                 exc.name = type < 100 ? "yn" : (type < 200 ? "ynf" : "ynl");
 822                 exc.retval = zero;
 823                 if (_LIB_VERSION == _POSIX_)
 824                         __set_errno (ERANGE);
 825                 else if (!matherr(&exc)) {
 826                         if (_LIB_VERSION == _SVID_) {
 827                                 (void) WRITE2(exc.name, 2);
 828                                 (void) WRITE2(": TLOSS error\n", 14);
 829                         }
 830                         __set_errno (ERANGE);
 831                 }
 832                 break;
 833             case 40:
 834             case 140:
 835             case 240:
 836                 /* tgamma(finite) overflow */
 837                 exc.type = OVERFLOW;
 838                 exc.name = type < 100 ? "tgamma" : (type < 200
 839                                                    ? "tgammaf" : "tgammal");
 840                 exc.retval = HUGE_VAL;
 841                 if (_LIB_VERSION == _POSIX_)
 842                   __set_errno (ERANGE);
 843                 else if (!matherr(&exc)) {
 844                   __set_errno (ERANGE);
 845                 }
 846                 break;
 847             case 41:
 848             case 141:
 849             case 241:
 850                 /* tgamma(-integer) */
 851                 exc.type = SING;
 852                 exc.name = type < 100 ? "tgamma" : (type < 200
 853                                                    ? "tgammaf" : "tgammal");
 854                 exc.retval = NAN;
 855                 if (_LIB_VERSION == _POSIX_)
 856                   __set_errno (EDOM);
 857                 else if (!matherr(&exc)) {
 858                   if (_LIB_VERSION == _SVID_) {
 859                         (void) WRITE2("tgamma: SING error\n", 18);
 860                         exc.retval = HUGE_VAL;
 861                       }
 862                   __set_errno (EDOM);
 863                 }
 864                 break;
 865             case 42:
 866             case 142:
 867             case 242:
 868                 /* pow(NaN,0.0) */
 869                 /* error only if _LIB_VERSION == _SVID_ & _XOPEN_ */
 870                 exc.type = DOMAIN;
 871                 exc.name = type < 100 ? "pow" : (type < 200 ? "powf" : "powl");
 872                 exc.retval = x;
 873                 if (_LIB_VERSION == _IEEE_ ||
 874                     _LIB_VERSION == _POSIX_) exc.retval = 1.0;
 875                 else if (!matherr(&exc)) {
 876                         __set_errno (EDOM);
 877                 }
 878                 break;
 879
 880             case 44:
 881             case 144:
 882             case 244:
 883                 /* exp(finite) overflow */
 884                 exc.type = OVERFLOW;
 885                 exc.name = type < 100 ? "exp2" : (type < 200
 886                                                   ? "exp2f" : "exp2l");
 887                 if (_LIB_VERSION == _SVID_)
 888                   exc.retval = HUGE;
 889                 else
 890                   exc.retval = HUGE_VAL;
 891                 if (_LIB_VERSION == _POSIX_)
 892                   __set_errno (ERANGE);
 893                 else if (!matherr(&exc)) {
 894                         __set_errno (ERANGE);
 895                 }
 896                 break;
 897             case 45:
 898             case 145:
 899             case 245:
 900                 /* exp(finite) underflow */
 901                 exc.type = UNDERFLOW;
 902                 exc.name = type < 100 ? "exp2" : (type < 200
 903                                                   ? "exp2f" : "exp2l");
 904                 exc.retval = zero;
 905                 if (_LIB_VERSION == _POSIX_)
 906                   __set_errno (ERANGE);
 907                 else if (!matherr(&exc)) {
 908                         __set_errno (ERANGE);
 909                 }
 910                 break;
 911
 912             case 46:
 913             case 146:
 914             case 246:
 915                 /* exp(finite) overflow */
 916                 exc.type = OVERFLOW;
 917                 exc.name = type < 100 ? "exp10" : (type < 200
 918                                                    ? "exp10f" : "exp10l");
 919                 if (_LIB_VERSION == _SVID_)
 920                   exc.retval = HUGE;
 921                 else
 922                   exc.retval = HUGE_VAL;
 923                 if (_LIB_VERSION == _POSIX_)
 924                   __set_errno (ERANGE);
 925                 else if (!matherr(&exc)) {
 926                         __set_errno (ERANGE);
 927                 }
 928                 break;
 929             case 47:
 930             case 147:
 931             case 247:
 932                 /* exp(finite) underflow */
 933                 exc.type = UNDERFLOW;
 934                 exc.name = type < 100 ? "exp10" : (type < 200
 935                                                    ? "exp10f" : "exp10l");
 936                 exc.retval = zero;
 937                 if (_LIB_VERSION == _POSIX_)
 938                   __set_errno (ERANGE);
 939                 else if (!matherr(&exc)) {
 940                         __set_errno (ERANGE);
 941                 }
 942                 break;
 943             case 48:
 944             case 148:
 945             case 248:
 946                 /* log2(0) */
 947                 exc.type = SING;
 948                 exc.name = type < 100 ? "log2" : (type < 200
 949                                                    ? "log2f" : "log2l");
 950                 if (_LIB_VERSION == _SVID_)
 951                   exc.retval = -HUGE;
 952                 else
 953                   exc.retval = -HUGE_VAL;
 954                 if (_LIB_VERSION == _POSIX_)
 955                   __set_errno (ERANGE);
 956                 else if (!matherr(&exc)) {
 957                   __set_errno (EDOM);
 958                 }
 959                 break;
 960             case 49:
 961             case 149:
 962             case 249:
 963                 /* log2(x<0) */
 964                 exc.type = DOMAIN;
 965                 exc.name = type < 100 ? "log2" : (type < 200
 966                                                    ? "log2f" : "log2l");
 967                 if (_LIB_VERSION == _SVID_)
 968                   exc.retval = -HUGE;
 969                 else
 970                   exc.retval = NAN;
 971                 if (_LIB_VERSION == _POSIX_)
 972                   __set_errno (EDOM);
 973                 else if (!matherr(&exc)) {
 974                   __set_errno (EDOM);
 975                 }
 976                 break;
 977             case 50:
 978             case 150:
 979             case 250:
 980                 /* tgamma(+-0) */
 981                 exc.type = SING;
 982                 exc.name = type < 100 ? "tgamma" : (type < 200
 983                                                     ? "tgammaf" : "tgammal");
 984                 exc.retval = __copysign (HUGE_VAL, x);
 985                 if (_LIB_VERSION == _POSIX_)
 986                   __set_errno (ERANGE);
 987                 else if (!matherr(&exc)) {
 988                   if (_LIB_VERSION == _SVID_)
 989                     (void) WRITE2("tgamma: SING error\n", 18);
 990                   __set_errno (ERANGE);
 991                 }
 992                 break;
 993
 994                 /* #### Last used is 50/150/250 ### */
 995         }
 996         return exc.retval;
 997 }