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1 27 unneback 
//===========================================================================
2 
//
3 
//      signgam.cxx
4 
//
5 
//      Support sign of the gamma*() functions in Math library
6 
//
7 
//===========================================================================
8 
//####ECOSGPLCOPYRIGHTBEGIN####
9 
// -------------------------------------------
10 
// This file is part of eCos, the Embedded Configurable Operating System.
11 
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
12 
//
13 
// eCos is free software; you can redistribute it and/or modify it under
14 
// the terms of the GNU General Public License as published by the Free
15 
// Software Foundation; either version 2 or (at your option) any later version.
16 
//
17 
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
20 
// for more details.
21 
//
22 
// You should have received a copy of the GNU General Public License along
23 
// with eCos; if not, write to the Free Software Foundation, Inc.,
24 
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25 
//
26 
// As a special exception, if other files instantiate templates or use macros
27 
// or inline functions from this file, or you compile this file and link it
28 
// with other works to produce a work based on this file, this file does not
29 
// by itself cause the resulting work to be covered by the GNU General Public
30 
// License. However the source code for this file must still be made available
31 
// in accordance with section (3) of the GNU General Public License.
32 
//
33 
// This exception does not invalidate any other reasons why a work based on
34 
// this file might be covered by the GNU General Public License.
35 
//
36 
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 
// at http://sources.redhat.com/ecos/ecos-license/
38 
// -------------------------------------------
39 
//####ECOSGPLCOPYRIGHTEND####
40 
//===========================================================================
41 
//#####DESCRIPTIONBEGIN####
42 
//
43 
// Author(s):   jlarmour
44 
// Contributors:  jlarmour
45 
// Date:        1998-02-13
46 
// Purpose:
47 
// Description: Contains the accessor functions to get and set the stored sign
48 
//              of the gamma*() functions in the math library
49 
// Usage:
50 
//
51 
//####DESCRIPTIONEND####
52 
//
53 
//===========================================================================
54 
 
55 
/* @(#)k_standard.c 1.3 95/01/18 */
56 
/*
57 
 * ====================================================
58 
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
59 
 *
60 
 * Developed at SunSoft, a Sun Microsystems, Inc. business.
61 
 * Permission to use, copy, modify, and distribute this
62 
 * software is freely granted, provided that this notice
63 
 * is preserved.
64 
 * ====================================================
65 
 *
66 
 */
67 
 
68 
// CONFIGURATION
69 
 
70 
#include <pkgconf/libm.h>   // Configuration header
71 
 
72 
// Include the Math library?
73 
#ifdef CYGPKG_LIBM
74 
 
75 
// INCLUDES
76 
 
77 
#include <cyg/infra/cyg_type.h>    // Common type definitions and support
78 
#include <cyg/infra/cyg_trac.h>    // Tracing macros
79 
 
80 
#include <math.h>                  // Main header for math library
81 
#include "mathincl/fdlibm.h"       // Internal header for math library
82 
 
83 
#include <cyg/error/codes.h>       // standard error codes
84 
 
85 
#ifndef CYGSEM_LIBM_COMPAT_IEEE_ONLY
86 
#include <errno.h>
87 
#else
88 
static int errno; // this whole file won't be used if we're IEEE only, but
89 
                  // doing this keeps the compiler happy
90 
#endif
91 
 
92 
#ifdef CYGSEM_LIBM_USE_STDERR
93 
 
94 
#include <stdio.h>
95 
#define WRITE2(u,v)     fputs(u, stderr)
96 
 
97 
#else
98 
 
99 
#define WRITE2(u,v)     0
100 
 
101 
#endif // ifdef CYGSEM_LIBM_USE_STDERR
102 
 
103 
 
104 
// GLOBALS
105 
 
106 
static const double zero = 0.0;
107 
 
108 
// FUNCTIONS
109 
 
110 
/*
111 
 * Standard conformance (non-IEEE) on exception cases.
112 
 * Mapping:
113 
 *      1 -- acos(|x|>1)
114 
 *      2 -- asin(|x|>1)
115 
 *      3 -- atan2(+-0,+-0)
116 
 *      4 -- hypot overflow
117 
 *      5 -- cosh overflow
118 
 *      6 -- exp overflow
119 
 *      7 -- exp underflow
120 
 *      8 -- y0(0)
121 
 *      9 -- y0(-ve)
122 
 *      10-- y1(0)
123 
 *      11-- y1(-ve)
124 
 *      12-- yn(0)
125 
 *      13-- yn(-ve)
126 
 *      14-- lgamma(finite) overflow
127 
 *      15-- lgamma(-integer)
128 
 *      16-- log(0)
129 
 *      17-- log(x<0)
130 
 *      18-- log10(0)
131 
 *      19-- log10(x<0)
132 
 *      20-- pow(0.0,0.0)
133 
 *      21-- pow(x,y) overflow
134 
 *      22-- pow(x,y) underflow
135 
 *      23-- pow(0,negative)
136 
 *      24-- pow(neg,non-integral)
137 
 *      25-- sinh(finite) overflow
138 
 *      26-- sqrt(negative)
139 
 *      27-- fmod(x,0)
140 
 *      28-- remainder(x,0)
141 
 *      29-- acosh(x<1)
142 
 *      30-- atanh(|x|>1)
143 
 *      31-- atanh(|x|=1)
144 
 *      32-- scalb overflow
145 
 *      33-- scalb underflow
146 
 *      34-- j0(|x|>X_TLOSS)
147 
 *      35-- y0(x>X_TLOSS)
148 
 *      36-- j1(|x|>X_TLOSS)
149 
 *      37-- y1(x>X_TLOSS)
150 
 *      38-- jn(|x|>X_TLOSS, n)
151 
 *      39-- yn(x>X_TLOSS, n)
152 
 *      40-- gamma(finite) overflow
153 
 *      41-- gamma(-integer)
154 
 *      42-- pow(NaN,0.0)
155 
 *      43-- ldexp overflow
156 
 *      44-- ldexp underflow
157 
 */
158 
 
159 
 
160 
double
161 
__kernel_standard(double x, double y, int type)
162 
{
163 
        struct exception exc;
164 
 
165 
#ifdef CYGSEM_LIBM_USE_STDERR
166 
        (void) fflush(stdout);
167 
#endif
168 
        exc.arg1 = x;
169 
        exc.arg2 = y;
170 
        switch(type) {
171 
            case 1:
172 
                /* acos(|x|>1) */
173 
                exc.type = DOMAIN;
174 
                exc.name = "acos";
175 
                exc.retval = zero;
176 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
177 
                  errno = EDOM;
178 
                else if (!matherr(&exc)) {
179 
                  if(cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
180 
                    (void) WRITE2("acos: DOMAIN error\n", 19);
181 
                  }
182 
                  errno = EDOM;
183 
                }
184 
                break;
185 
            case 2:
186 
                /* asin(|x|>1) */
187 
                exc.type = DOMAIN;
188 
                exc.name = "asin";
189 
                exc.retval = zero;
190 
                if(cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
191 
                  errno = EDOM;
192 
                else if (!matherr(&exc)) {
193 
                  if(cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
194 
                        (void) WRITE2("asin: DOMAIN error\n", 19);
195 
                  }
196 
                  errno = EDOM;
197 
                }
198 
                break;
199 
            case 3:
200 
                /* atan2(+-0,+-0) */
201 
                exc.arg1 = y;
202 
                exc.arg2 = x;
203 
                exc.type = DOMAIN;
204 
                exc.name = "atan2";
205 
                exc.retval = zero;
206 
                if(cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
207 
                  errno = EDOM;
208 
                else if (!matherr(&exc)) {
209 
                  if(cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
210 
                        (void) WRITE2("atan2: DOMAIN error\n", 20);
211 
                      }
212 
                  errno = EDOM;
213 
                }
214 
                break;
215 
            case 4:
216 
                /* hypot(finite,finite) overflow */
217 
                exc.type = OVERFLOW;
218 
                exc.name = "hypot";
219 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
220 
                  exc.retval = HUGE;
221 
                else
222 
                  exc.retval = HUGE_VAL;
223 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
224 
                  errno = ERANGE;
225 
                else if (!matherr(&exc)) {
226 
                        errno = ERANGE;
227 
                }
228 
                break;
229 
            case 5:
230 
                /* cosh(finite) overflow */
231 
                exc.type = OVERFLOW;
232 
                exc.name = "cosh";
233 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
234 
                  exc.retval = HUGE;
235 
                else
236 
                  exc.retval = HUGE_VAL;
237 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
238 
                  errno = ERANGE;
239 
                else if (!matherr(&exc)) {
240 
                        errno = ERANGE;
241 
                }
242 
                break;
243 
            case 6:
244 
                /* exp(finite) overflow */
245 
                exc.type = OVERFLOW;
246 
                exc.name = "exp";
247 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
248 
                  exc.retval = HUGE;
249 
                else
250 
                  exc.retval = HUGE_VAL;
251 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
252 
                  errno = ERANGE;
253 
                else if (!matherr(&exc)) {
254 
                        errno = ERANGE;
255 
                }
256 
                break;
257 
            case 7:
258 
                /* exp(finite) underflow */
259 
                exc.type = UNDERFLOW;
260 
                exc.name = "exp";
261 
                exc.retval = zero;
262 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
263 
                  errno = ERANGE;
264 
                else if (!matherr(&exc)) {
265 
                        errno = ERANGE;
266 
                }
267 
                break;
268 
            case 8:
269 
                /* y0(0) = -inf */
270 
                exc.type = DOMAIN;      /* should be SING for IEEE */
271 
                exc.name = "y0";
272 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
273 
                  exc.retval = -HUGE;
274 
                else
275 
                  exc.retval = -HUGE_VAL;
276 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
277 
                  errno = EDOM;
278 
                else if (!matherr(&exc)) {
279 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
280 
                        (void) WRITE2("y0: DOMAIN error\n", 17);
281 
                      }
282 
                  errno = EDOM;
283 
                }
284 
                break;
285 
            case 9:
286 
                /* y0(x<0) = NaN */
287 
                exc.type = DOMAIN;
288 
                exc.name = "y0";
289 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
290 
                  exc.retval = -HUGE;
291 
                else
292 
                  exc.retval = -HUGE_VAL;
293 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
294 
                  errno = EDOM;
295 
                else if (!matherr(&exc)) {
296 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
297 
                        (void) WRITE2("y0: DOMAIN error\n", 17);
298 
                      }
299 
                  errno = EDOM;
300 
                }
301 
                break;
302 
            case 10:
303 
                /* y1(0) = -inf */
304 
                exc.type = DOMAIN;      /* should be SING for IEEE */
305 
                exc.name = "y1";
306 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
307 
                  exc.retval = -HUGE;
308 
                else
309 
                  exc.retval = -HUGE_VAL;
310 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
311 
                  errno = EDOM;
312 
                else if (!matherr(&exc)) {
313 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
314 
                        (void) WRITE2("y1: DOMAIN error\n", 17);
315 
                      }
316 
                  errno = EDOM;
317 
                }
318 
                break;
319 
            case 11:
320 
                /* y1(x<0) = NaN */
321 
                exc.type = DOMAIN;
322 
                exc.name = "y1";
323 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
324 
                  exc.retval = -HUGE;
325 
                else
326 
                  exc.retval = -HUGE_VAL;
327 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
328 
                  errno = EDOM;
329 
                else if (!matherr(&exc)) {
330 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
331 
                        (void) WRITE2("y1: DOMAIN error\n", 17);
332 
                      }
333 
                  errno = EDOM;
334 
                }
335 
                break;
336 
            case 12:
337 
                /* yn(n,0) = -inf */
338 
                exc.type = DOMAIN;      /* should be SING for IEEE */
339 
                exc.name = "yn";
340 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
341 
                  exc.retval = -HUGE;
342 
                else
343 
                  exc.retval = -HUGE_VAL;
344 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
345 
                  errno = EDOM;
346 
                else if (!matherr(&exc)) {
347 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
348 
                        (void) WRITE2("yn: DOMAIN error\n", 17);
349 
                      }
350 
                  errno = EDOM;
351 
                }
352 
                break;
353 
            case 13:
354 
                /* yn(x<0) = NaN */
355 
                exc.type = DOMAIN;
356 
                exc.name = "yn";
357 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
358 
                  exc.retval = -HUGE;
359 
                else
360 
                  exc.retval = -HUGE_VAL;
361 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
362 
                  errno = EDOM;
363 
                else if (!matherr(&exc)) {
364 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
365 
                        (void) WRITE2("yn: DOMAIN error\n", 17);
366 
                      }
367 
                  errno = EDOM;
368 
                }
369 
                break;
370 
            case 14:
371 
                /* lgamma(finite) overflow */
372 
                exc.type = OVERFLOW;
373 
                exc.name = "lgamma";
374 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
375 
                  exc.retval = HUGE;
376 
                else
377 
                  exc.retval = HUGE_VAL;
378 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
379 
                        errno = ERANGE;
380 
                else if (!matherr(&exc)) {
381 
                        errno = ERANGE;
382 
                }
383 
                break;
384 
            case 15:
385 
                /* lgamma(-integer) or lgamma(0) */
386 
                exc.type = SING;
387 
                exc.name = "lgamma";
388 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
389 
                  exc.retval = HUGE;
390 
                else
391 
                  exc.retval = HUGE_VAL;
392 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
393 
                  errno = EDOM;
394 
                else if (!matherr(&exc)) {
395 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
396 
                        (void) WRITE2("lgamma: SING error\n", 19);
397 
                      }
398 
                  errno = EDOM;
399 
                }
400 
                break;
401 
            case 16:
402 
                /* log(0) */
403 
                exc.type = SING;
404 
                exc.name = "log";
405 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
406 
                  exc.retval = -HUGE;
407 
                else
408 
                  exc.retval = -HUGE_VAL;
409 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
410 
                  errno = ERANGE;
411 
                else if (!matherr(&exc)) {
412 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
413 
                        (void) WRITE2("log: SING error\n", 16);
414 
                      }
415 
                  errno = EDOM;
416 
                }
417 
                break;
418 
            case 17:
419 
                /* log(x<0) */
420 
                exc.type = DOMAIN;
421 
                exc.name = "log";
422 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
423 
                  exc.retval = -HUGE;
424 
                else
425 
                  exc.retval = -HUGE_VAL;
426 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
427 
                  errno = EDOM;
428 
                else if (!matherr(&exc)) {
429 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
430 
                        (void) WRITE2("log: DOMAIN error\n", 18);
431 
                      }
432 
                  errno = EDOM;
433 
                }
434 
                break;
435 
            case 18:
436 
                /* log10(0) */
437 
                exc.type = SING;
438 
                exc.name = "log10";
439 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
440 
                  exc.retval = -HUGE;
441 
                else
442 
                  exc.retval = -HUGE_VAL;
443 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
444 
                  errno = ERANGE;
445 
                else if (!matherr(&exc)) {
446 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
447 
                        (void) WRITE2("log10: SING error\n", 18);
448 
                      }
449 
                  errno = EDOM;
450 
                }
451 
                break;
452 
            case 19:
453 
                /* log10(x<0) */
454 
                exc.type = DOMAIN;
455 
                exc.name = "log10";
456 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
457 
                  exc.retval = -HUGE;
458 
                else
459 
                  exc.retval = -HUGE_VAL;
460 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
461 
                  errno = EDOM;
462 
                else if (!matherr(&exc)) {
463 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
464 
                        (void) WRITE2("log10: DOMAIN error\n", 20);
465 
                      }
466 
                  errno = EDOM;
467 
                }
468 
                break;
469 
            case 20:
470 
                /* pow(0.0,0.0) */
471 
                /* error only if cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID */
472 
                exc.type = DOMAIN;
473 
                exc.name = "pow";
474 
                exc.retval = zero;
475 
                if (cyg_libm_get_compat_mode() != CYGNUM_LIBM_COMPAT_SVID) exc.retval = 1.0;
476 
                else if (!matherr(&exc)) {
477 
                        (void) WRITE2("pow(0,0): DOMAIN error\n", 23);
478 
                        errno = EDOM;
479 
                }
480 
                break;
481 
            case 21:
482 
                /* pow(x,y) overflow */
483 
                exc.type = OVERFLOW;
484 
                exc.name = "pow";
485 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
486 
                  exc.retval = HUGE;
487 
                  y *= 0.5;
488 
                  if(x<zero&&rint(y)!=y) exc.retval = -HUGE;
489 
                } else {
490 
                  exc.retval = HUGE_VAL;
491 
                  y *= 0.5;
492 
                  if(x<zero&&rint(y)!=y) exc.retval = -HUGE_VAL;
493 
                }
494 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
495 
                  errno = ERANGE;
496 
                else if (!matherr(&exc)) {
497 
                        errno = ERANGE;
498 
                }
499 
                break;
500 
            case 22:
501 
                /* pow(x,y) underflow */
502 
                exc.type = UNDERFLOW;
503 
                exc.name = "pow";
504 
                exc.retval =  zero;
505 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
506 
                  errno = ERANGE;
507 
                else if (!matherr(&exc)) {
508 
                        errno = ERANGE;
509 
                }
510 
                break;
511 
            case 23:
512 
                /* 0**neg */
513 
                exc.type = DOMAIN;
514 
                exc.name = "pow";
515 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
516 
                  exc.retval = zero;
517 
                else
518 
                  exc.retval = -HUGE_VAL;
519 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
520 
                  errno = EDOM;
521 
                else if (!matherr(&exc)) {
522 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
523 
                        (void) WRITE2("pow(0,neg): DOMAIN error\n", 25);
524 
                      }
525 
                  errno = EDOM;
526 
                }
527 
                break;
528 
            case 24:
529 
                /* neg**non-integral */
530 
                exc.type = DOMAIN;
531 
                exc.name = "pow";
532 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
533 
                    exc.retval = zero;
534 
                else
535 
                    exc.retval = zero/zero;     /* X/Open allow NaN */
536 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
537 
                   errno = EDOM;
538 
                else if (!matherr(&exc)) {
539 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
540 
                        (void) WRITE2("neg**non-integral: DOMAIN error\n", 32);
541 
                      }
542 
                  errno = EDOM;
543 
                }
544 
                break;
545 
            case 25:
546 
                /* sinh(finite) overflow */
547 
                exc.type = OVERFLOW;
548 
                exc.name = "sinh";
549 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
550 
                  exc.retval = ( (x>zero) ? HUGE : -HUGE);
551 
                else
552 
                  exc.retval = ( (x>zero) ? HUGE_VAL : -HUGE_VAL);
553 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
554 
                  errno = ERANGE;
555 
                else if (!matherr(&exc)) {
556 
                        errno = ERANGE;
557 
                }
558 
                break;
559 
            case 26:
560 
                /* sqrt(x<0) */
561 
                exc.type = DOMAIN;
562 
                exc.name = "sqrt";
563 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
564 
                  exc.retval = zero;
565 
                else
566 
                  exc.retval = zero/zero;
567 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
568 
                  errno = EDOM;
569 
                else if (!matherr(&exc)) {
570 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
571 
                        (void) WRITE2("sqrt: DOMAIN error\n", 19);
572 
                      }
573 
                  errno = EDOM;
574 
                }
575 
                break;
576 
            case 27:
577 
                /* fmod(x,0) */
578 
                exc.type = DOMAIN;
579 
                exc.name = "fmod";
580 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
581 
                    exc.retval = x;
582 
                else
583 
                    exc.retval = zero/zero;
584 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
585 
                  errno = EDOM;
586 
                else if (!matherr(&exc)) {
587 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
588 
                    (void) WRITE2("fmod:  DOMAIN error\n", 20);
589 
                  }
590 
                  errno = EDOM;
591 
                }
592 
                break;
593 
            case 28:
594 
                /* remainder(x,0) */
595 
                exc.type = DOMAIN;
596 
                exc.name = "remainder";
597 
                exc.retval = zero/zero;
598 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
599 
                  errno = EDOM;
600 
                else if (!matherr(&exc)) {
601 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
602 
                    (void) WRITE2("remainder: DOMAIN error\n", 24);
603 
                  }
604 
                  errno = EDOM;
605 
                }
606 
                break;
607 
            case 29:
608 
                /* acosh(x<1) */
609 
                exc.type = DOMAIN;
610 
                exc.name = "acosh";
611 
                exc.retval = zero/zero;
612 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
613 
                  errno = EDOM;
614 
                else if (!matherr(&exc)) {
615 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
616 
                    (void) WRITE2("acosh: DOMAIN error\n", 20);
617 
                  }
618 
                  errno = EDOM;
619 
                }
620 
                break;
621 
            case 30:
622 
                /* atanh(|x|>1) */
623 
                exc.type = DOMAIN;
624 
                exc.name = "atanh";
625 
                exc.retval = zero/zero;
626 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
627 
                  errno = EDOM;
628 
                else if (!matherr(&exc)) {
629 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
630 
                    (void) WRITE2("atanh: DOMAIN error\n", 20);
631 
                  }
632 
                  errno = EDOM;
633 
                }
634 
                break;
635 
            case 31:
636 
                /* atanh(|x|=1) */
637 
                exc.type = SING;
638 
                exc.name = "atanh";
639 
                exc.retval = x/zero;    /* sign(x)*inf */
640 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
641 
                  errno = EDOM;
642 
                else if (!matherr(&exc)) {
643 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
644 
                    (void) WRITE2("atanh: SING error\n", 18);
645 
                  }
646 
                  errno = EDOM;
647 
                }
648 
                break;
649 
            case 32:
650 
                /* scalb overflow; SVID also returns +-HUGE_VAL */
651 
                exc.type = OVERFLOW;
652 
                exc.name = "scalb";
653 
                exc.retval = x > zero ? HUGE_VAL : -HUGE_VAL;
654 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
655 
                  errno = ERANGE;
656 
                else if (!matherr(&exc)) {
657 
                        errno = ERANGE;
658 
                }
659 
                break;
660 
            case 33:
661 
                /* scalb underflow */
662 
                exc.type = UNDERFLOW;
663 
                exc.name = "scalb";
664 
                exc.retval = copysign(zero,x);
665 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
666 
                  errno = ERANGE;
667 
                else if (!matherr(&exc)) {
668 
                        errno = ERANGE;
669 
                }
670 
                break;
671 
            case 34:
672 
                /* j0(|x|>X_TLOSS) */
673 
                exc.type = TLOSS;
674 
                exc.name = "j0";
675 
                exc.retval = zero;
676 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
677 
                        errno = ERANGE;
678 
                else if (!matherr(&exc)) {
679 
                        if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
680 
                                (void) WRITE2(exc.name, 2);
681 
                                (void) WRITE2(": TLOSS error\n", 14);
682 
                        }
683 
                        errno = ERANGE;
684 
                }
685 
                break;
686 
            case 35:
687 
                /* y0(x>X_TLOSS) */
688 
                exc.type = TLOSS;
689 
                exc.name = "y0";
690 
                exc.retval = zero;
691 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
692 
                        errno = ERANGE;
693 
                else if (!matherr(&exc)) {
694 
                        if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
695 
                                (void) WRITE2(exc.name, 2);
696 
                                (void) WRITE2(": TLOSS error\n", 14);
697 
                        }
698 
                        errno = ERANGE;
699 
                }
700 
                break;
701 
            case 36:
702 
                /* j1(|x|>X_TLOSS) */
703 
                exc.type = TLOSS;
704 
                exc.name = "j1";
705 
                exc.retval = zero;
706 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
707 
                        errno = ERANGE;
708 
                else if (!matherr(&exc)) {
709 
                        if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
710 
                                (void) WRITE2(exc.name, 2);
711 
                                (void) WRITE2(": TLOSS error\n", 14);
712 
                        }
713 
                        errno = ERANGE;
714 
                }
715 
                break;
716 
            case 37:
717 
                /* y1(x>X_TLOSS) */
718 
                exc.type = TLOSS;
719 
                exc.name = "y1";
720 
                exc.retval = zero;
721 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
722 
                        errno = ERANGE;
723 
                else if (!matherr(&exc)) {
724 
                        if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
725 
                                (void) WRITE2(exc.name, 2);
726 
                                (void) WRITE2(": TLOSS error\n", 14);
727 
                        }
728 
                        errno = ERANGE;
729 
                }
730 
                break;
731 
            case 38:
732 
                /* jn(|x|>X_TLOSS) */
733 
                exc.type = TLOSS;
734 
                exc.name = "jn";
735 
                exc.retval = zero;
736 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
737 
                        errno = ERANGE;
738 
                else if (!matherr(&exc)) {
739 
                        if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
740 
                                (void) WRITE2(exc.name, 2);
741 
                                (void) WRITE2(": TLOSS error\n", 14);
742 
                        }
743 
                        errno = ERANGE;
744 
                }
745 
                break;
746 
            case 39:
747 
                /* yn(x>X_TLOSS) */
748 
                exc.type = TLOSS;
749 
                exc.name = "yn";
750 
                exc.retval = zero;
751 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
752 
                        errno = ERANGE;
753 
                else if (!matherr(&exc)) {
754 
                        if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
755 
                                (void) WRITE2(exc.name, 2);
756 
                                (void) WRITE2(": TLOSS error\n", 14);
757 
                        }
758 
                        errno = ERANGE;
759 
                }
760 
                break;
761 
            case 40:
762 
                /* gamma(finite) overflow */
763 
                exc.type = OVERFLOW;
764 
                exc.name = "gamma";
765 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
766 
                  exc.retval = HUGE;
767 
                else
768 
                  exc.retval = HUGE_VAL;
769 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
770 
                  errno = ERANGE;
771 
                else if (!matherr(&exc)) {
772 
                  errno = ERANGE;
773 
                }
774 
                break;
775 
            case 41:
776 
                /* gamma(-integer) or gamma(0) */
777 
                exc.type = SING;
778 
                exc.name = "gamma";
779 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID)
780 
                  exc.retval = HUGE;
781 
                else
782 
                  exc.retval = HUGE_VAL;
783 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
784 
                  errno = EDOM;
785 
                else if (!matherr(&exc)) {
786 
                  if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID) {
787 
                        (void) WRITE2("gamma: SING error\n", 18);
788 
                      }
789 
                  errno = EDOM;
790 
                }
791 
                break;
792 
            case 42:
793 
                /* pow(NaN,0.0) */
794 
                /* error only if cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_SVID & CYGNUM_LIBM_COMPAT_XOPEN */
795 
                exc.type = DOMAIN;
796 
                exc.name = "pow";
797 
                exc.retval = x;
798 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_IEEE ||
799 
                    cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX) exc.retval = 1.0;
800 
                else if (!matherr(&exc)) {
801 
                        errno = EDOM;
802 
                }
803 
                break;
804 
            case 43:
805 
                /* ldexp overflow; SVID also returns +-HUGE_VAL */
806 
                exc.type = OVERFLOW;
807 
                exc.name = "ldexp";
808 
                exc.retval = x > zero ? HUGE_VAL : -HUGE_VAL;
809 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
810 
                  errno = ERANGE;
811 
                else if (!matherr(&exc)) {
812 
                        errno = ERANGE;
813 
                }
814 
                break;
815 
            case 44:
816 
                /* ldexp underflow */
817 
                exc.type = UNDERFLOW;
818 
                exc.name = "ldexp";
819 
                exc.retval = copysign(zero,x);
820 
                if (cyg_libm_get_compat_mode() == CYGNUM_LIBM_COMPAT_POSIX)
821 
                  errno = ERANGE;
822 
                else if (!matherr(&exc)) {
823 
                        errno = ERANGE;
824 
                }
825 
                break;
826 
        }
827 
        return exc.retval;
828 
}
829 
 
830 
#endif // ifdef CYGPKG_LIBM
831 
 
832 
// EOF standard.c

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