Commit | Line | Data |
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b70021f4 | 1 | /* Primitive operations on floating point for GNU Emacs Lisp interpreter. |
68c45bf0 | 2 | Copyright (C) 1988, 1993, 1994, 1999 Free Software Foundation, Inc. |
b70021f4 MR |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
4746118a | 8 | the Free Software Foundation; either version 2, or (at your option) |
b70021f4 MR |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
b70021f4 MR |
20 | |
21 | ||
4b6baf5f RS |
22 | /* ANSI C requires only these float functions: |
23 | acos, asin, atan, atan2, ceil, cos, cosh, exp, fabs, floor, fmod, | |
24 | frexp, ldexp, log, log10, modf, pow, sin, sinh, sqrt, tan, tanh. | |
25 | ||
26 | Define HAVE_INVERSE_HYPERBOLIC if you have acosh, asinh, and atanh. | |
27 | Define HAVE_CBRT if you have cbrt. | |
dca6c914 | 28 | Define HAVE_RINT if you have a working rint. |
4b6baf5f RS |
29 | If you don't define these, then the appropriate routines will be simulated. |
30 | ||
31 | Define HAVE_MATHERR if on a system supporting the SysV matherr callback. | |
32 | (This should happen automatically.) | |
33 | ||
34 | Define FLOAT_CHECK_ERRNO if the float library routines set errno. | |
35 | This has no effect if HAVE_MATHERR is defined. | |
36 | ||
37 | Define FLOAT_CATCH_SIGILL if the float library routines signal SIGILL. | |
38 | (What systems actually do this? Please let us know.) | |
39 | ||
40 | Define FLOAT_CHECK_DOMAIN if the float library doesn't handle errors by | |
8e6208c5 | 41 | either setting errno, or signaling SIGFPE/SIGILL. Otherwise, domain and |
4b6baf5f RS |
42 | range checking will happen before calling the float routines. This has |
43 | no effect if HAVE_MATHERR is defined (since matherr will be called when | |
44 | a domain error occurs.) | |
45 | */ | |
46 | ||
18160b98 | 47 | #include <config.h> |
68c45bf0 | 48 | #include <signal.h> |
523e9291 RS |
49 | #include "lisp.h" |
50 | #include "syssignal.h" | |
51 | ||
2f261542 PE |
52 | #if STDC_HEADERS |
53 | #include <float.h> | |
54 | #endif | |
55 | ||
d137ae2f PE |
56 | /* If IEEE_FLOATING_POINT isn't defined, default it from FLT_*. */ |
57 | #ifndef IEEE_FLOATING_POINT | |
58 | #if (FLT_RADIX == 2 && FLT_MANT_DIG == 24 \ | |
59 | && FLT_MIN_EXP == -125 && FLT_MAX_EXP == 128) | |
60 | #define IEEE_FLOATING_POINT 1 | |
61 | #else | |
62 | #define IEEE_FLOATING_POINT 0 | |
63 | #endif | |
64 | #endif | |
65 | ||
4cd7a373 RS |
66 | /* Work around a problem that happens because math.h on hpux 7 |
67 | defines two static variables--which, in Emacs, are not really static, | |
68 | because `static' is defined as nothing. The problem is that they are | |
69 | defined both here and in lread.c. | |
70 | These macros prevent the name conflict. */ | |
71 | #if defined (HPUX) && !defined (HPUX8) | |
72 | #define _MAXLDBL floatfns_maxldbl | |
73 | #define _NMAXLDBL floatfns_nmaxldbl | |
74 | #endif | |
75 | ||
b70021f4 | 76 | #include <math.h> |
4b6baf5f | 77 | |
32085e8e | 78 | /* This declaration is omitted on some systems, like Ultrix. */ |
7a4720e2 | 79 | #if !defined (HPUX) && defined (HAVE_LOGB) && !defined (logb) |
c26406fe | 80 | extern double logb (); |
7a4720e2 | 81 | #endif /* not HPUX and HAVE_LOGB and no logb macro */ |
c26406fe | 82 | |
4b6baf5f RS |
83 | #if defined(DOMAIN) && defined(SING) && defined(OVERFLOW) |
84 | /* If those are defined, then this is probably a `matherr' machine. */ | |
85 | # ifndef HAVE_MATHERR | |
86 | # define HAVE_MATHERR | |
87 | # endif | |
88 | #endif | |
89 | ||
c0f0a4a2 | 90 | #ifdef NO_MATHERR |
f89182a2 RS |
91 | #undef HAVE_MATHERR |
92 | #endif | |
93 | ||
4b6baf5f RS |
94 | #ifdef HAVE_MATHERR |
95 | # ifdef FLOAT_CHECK_ERRNO | |
96 | # undef FLOAT_CHECK_ERRNO | |
97 | # endif | |
98 | # ifdef FLOAT_CHECK_DOMAIN | |
99 | # undef FLOAT_CHECK_DOMAIN | |
100 | # endif | |
101 | #endif | |
102 | ||
103 | #ifndef NO_FLOAT_CHECK_ERRNO | |
104 | #define FLOAT_CHECK_ERRNO | |
105 | #endif | |
106 | ||
107 | #ifdef FLOAT_CHECK_ERRNO | |
108 | # include <errno.h> | |
265a9e55 JB |
109 | |
110 | extern int errno; | |
4b6baf5f | 111 | #endif |
265a9e55 JB |
112 | |
113 | /* Avoid traps on VMS from sinh and cosh. | |
114 | All the other functions set errno instead. */ | |
115 | ||
116 | #ifdef VMS | |
117 | #undef cosh | |
118 | #undef sinh | |
119 | #define cosh(x) ((exp(x)+exp(-x))*0.5) | |
120 | #define sinh(x) ((exp(x)-exp(-x))*0.5) | |
121 | #endif /* VMS */ | |
122 | ||
4746118a | 123 | static SIGTYPE float_error (); |
b70021f4 MR |
124 | |
125 | /* Nonzero while executing in floating point. | |
126 | This tells float_error what to do. */ | |
127 | ||
128 | static int in_float; | |
129 | ||
130 | /* If an argument is out of range for a mathematical function, | |
21876236 RS |
131 | here is the actual argument value to use in the error message. |
132 | These variables are used only across the floating point library call | |
133 | so there is no need to staticpro them. */ | |
b70021f4 | 134 | |
4b6baf5f RS |
135 | static Lisp_Object float_error_arg, float_error_arg2; |
136 | ||
137 | static char *float_error_fn_name; | |
b70021f4 | 138 | |
265a9e55 JB |
139 | /* Evaluate the floating point expression D, recording NUM |
140 | as the original argument for error messages. | |
141 | D is normally an assignment expression. | |
f8d83099 JB |
142 | Handle errors which may result in signals or may set errno. |
143 | ||
144 | Note that float_error may be declared to return void, so you can't | |
145 | just cast the zero after the colon to (SIGTYPE) to make the types | |
146 | check properly. */ | |
265a9e55 | 147 | |
4b6baf5f RS |
148 | #ifdef FLOAT_CHECK_ERRNO |
149 | #define IN_FLOAT(d, name, num) \ | |
150 | do { \ | |
151 | float_error_arg = num; \ | |
152 | float_error_fn_name = name; \ | |
153 | in_float = 1; errno = 0; (d); in_float = 0; \ | |
154 | switch (errno) { \ | |
155 | case 0: break; \ | |
156 | case EDOM: domain_error (float_error_fn_name, float_error_arg); \ | |
157 | case ERANGE: range_error (float_error_fn_name, float_error_arg); \ | |
158 | default: arith_error (float_error_fn_name, float_error_arg); \ | |
159 | } \ | |
160 | } while (0) | |
161 | #define IN_FLOAT2(d, name, num, num2) \ | |
162 | do { \ | |
163 | float_error_arg = num; \ | |
164 | float_error_arg2 = num2; \ | |
165 | float_error_fn_name = name; \ | |
166 | in_float = 1; errno = 0; (d); in_float = 0; \ | |
167 | switch (errno) { \ | |
168 | case 0: break; \ | |
169 | case EDOM: domain_error (float_error_fn_name, float_error_arg); \ | |
170 | case ERANGE: range_error (float_error_fn_name, float_error_arg); \ | |
171 | default: arith_error (float_error_fn_name, float_error_arg); \ | |
172 | } \ | |
173 | } while (0) | |
174 | #else | |
f8131ed2 | 175 | #define IN_FLOAT(d, name, num) (in_float = 1, (d), in_float = 0) |
4b6baf5f RS |
176 | #define IN_FLOAT2(d, name, num, num2) (in_float = 1, (d), in_float = 0) |
177 | #endif | |
178 | ||
81a63ccc KH |
179 | /* Convert float to Lisp_Int if it fits, else signal a range error |
180 | using the given arguments. */ | |
181 | #define FLOAT_TO_INT(x, i, name, num) \ | |
182 | do \ | |
183 | { \ | |
7936dcdb RS |
184 | if ((x) >= (((EMACS_INT) 1) << (VALBITS-1)) || \ |
185 | (x) <= - (((EMACS_INT) 1) << (VALBITS-1)) - 1) \ | |
81a63ccc | 186 | range_error (name, num); \ |
e0cb2a68 | 187 | XSETINT (i, (EMACS_INT)(x)); \ |
81a63ccc KH |
188 | } \ |
189 | while (0) | |
190 | #define FLOAT_TO_INT2(x, i, name, num1, num2) \ | |
191 | do \ | |
192 | { \ | |
7936dcdb RS |
193 | if ((x) >= (((EMACS_INT) 1) << (VALBITS-1)) || \ |
194 | (x) <= - (((EMACS_INT) 1) << (VALBITS-1)) - 1) \ | |
81a63ccc | 195 | range_error2 (name, num1, num2); \ |
e0cb2a68 | 196 | XSETINT (i, (EMACS_INT)(x)); \ |
81a63ccc KH |
197 | } \ |
198 | while (0) | |
199 | ||
4b6baf5f RS |
200 | #define arith_error(op,arg) \ |
201 | Fsignal (Qarith_error, Fcons (build_string ((op)), Fcons ((arg), Qnil))) | |
202 | #define range_error(op,arg) \ | |
203 | Fsignal (Qrange_error, Fcons (build_string ((op)), Fcons ((arg), Qnil))) | |
81a63ccc KH |
204 | #define range_error2(op,a1,a2) \ |
205 | Fsignal (Qrange_error, Fcons (build_string ((op)), \ | |
206 | Fcons ((a1), Fcons ((a2), Qnil)))) | |
4b6baf5f RS |
207 | #define domain_error(op,arg) \ |
208 | Fsignal (Qdomain_error, Fcons (build_string ((op)), Fcons ((arg), Qnil))) | |
209 | #define domain_error2(op,a1,a2) \ | |
81a63ccc KH |
210 | Fsignal (Qdomain_error, Fcons (build_string ((op)), \ |
211 | Fcons ((a1), Fcons ((a2), Qnil)))) | |
b70021f4 MR |
212 | |
213 | /* Extract a Lisp number as a `double', or signal an error. */ | |
214 | ||
215 | double | |
216 | extract_float (num) | |
217 | Lisp_Object num; | |
218 | { | |
219 | CHECK_NUMBER_OR_FLOAT (num, 0); | |
220 | ||
207a45c1 | 221 | if (FLOATP (num)) |
70949dac | 222 | return XFLOAT_DATA (num); |
b70021f4 MR |
223 | return (double) XINT (num); |
224 | } | |
c2d4ea74 RS |
225 | \f |
226 | /* Trig functions. */ | |
b70021f4 MR |
227 | |
228 | DEFUN ("acos", Facos, Sacos, 1, 1, 0, | |
229 | "Return the inverse cosine of ARG.") | |
4b6baf5f RS |
230 | (arg) |
231 | register Lisp_Object arg; | |
b70021f4 | 232 | { |
4b6baf5f RS |
233 | double d = extract_float (arg); |
234 | #ifdef FLOAT_CHECK_DOMAIN | |
235 | if (d > 1.0 || d < -1.0) | |
236 | domain_error ("acos", arg); | |
237 | #endif | |
238 | IN_FLOAT (d = acos (d), "acos", arg); | |
b70021f4 MR |
239 | return make_float (d); |
240 | } | |
241 | ||
c2d4ea74 RS |
242 | DEFUN ("asin", Fasin, Sasin, 1, 1, 0, |
243 | "Return the inverse sine of ARG.") | |
4b6baf5f RS |
244 | (arg) |
245 | register Lisp_Object arg; | |
b70021f4 | 246 | { |
4b6baf5f RS |
247 | double d = extract_float (arg); |
248 | #ifdef FLOAT_CHECK_DOMAIN | |
249 | if (d > 1.0 || d < -1.0) | |
250 | domain_error ("asin", arg); | |
251 | #endif | |
252 | IN_FLOAT (d = asin (d), "asin", arg); | |
b70021f4 MR |
253 | return make_float (d); |
254 | } | |
255 | ||
c2d4ea74 RS |
256 | DEFUN ("atan", Fatan, Satan, 1, 1, 0, |
257 | "Return the inverse tangent of ARG.") | |
4b6baf5f RS |
258 | (arg) |
259 | register Lisp_Object arg; | |
b70021f4 | 260 | { |
4b6baf5f RS |
261 | double d = extract_float (arg); |
262 | IN_FLOAT (d = atan (d), "atan", arg); | |
b70021f4 MR |
263 | return make_float (d); |
264 | } | |
265 | ||
c2d4ea74 RS |
266 | DEFUN ("cos", Fcos, Scos, 1, 1, 0, |
267 | "Return the cosine of ARG.") | |
4b6baf5f RS |
268 | (arg) |
269 | register Lisp_Object arg; | |
b70021f4 | 270 | { |
4b6baf5f RS |
271 | double d = extract_float (arg); |
272 | IN_FLOAT (d = cos (d), "cos", arg); | |
b70021f4 MR |
273 | return make_float (d); |
274 | } | |
275 | ||
c2d4ea74 RS |
276 | DEFUN ("sin", Fsin, Ssin, 1, 1, 0, |
277 | "Return the sine of ARG.") | |
4b6baf5f RS |
278 | (arg) |
279 | register Lisp_Object arg; | |
b70021f4 | 280 | { |
4b6baf5f RS |
281 | double d = extract_float (arg); |
282 | IN_FLOAT (d = sin (d), "sin", arg); | |
b70021f4 MR |
283 | return make_float (d); |
284 | } | |
285 | ||
c2d4ea74 RS |
286 | DEFUN ("tan", Ftan, Stan, 1, 1, 0, |
287 | "Return the tangent of ARG.") | |
4b6baf5f RS |
288 | (arg) |
289 | register Lisp_Object arg; | |
290 | { | |
291 | double d = extract_float (arg); | |
292 | double c = cos (d); | |
293 | #ifdef FLOAT_CHECK_DOMAIN | |
294 | if (c == 0.0) | |
295 | domain_error ("tan", arg); | |
296 | #endif | |
297 | IN_FLOAT (d = sin (d) / c, "tan", arg); | |
b70021f4 MR |
298 | return make_float (d); |
299 | } | |
300 | \f | |
c2d4ea74 RS |
301 | #if 0 /* Leave these out unless we find there's a reason for them. */ |
302 | ||
b70021f4 MR |
303 | DEFUN ("bessel-j0", Fbessel_j0, Sbessel_j0, 1, 1, 0, |
304 | "Return the bessel function j0 of ARG.") | |
4b6baf5f RS |
305 | (arg) |
306 | register Lisp_Object arg; | |
b70021f4 | 307 | { |
4b6baf5f RS |
308 | double d = extract_float (arg); |
309 | IN_FLOAT (d = j0 (d), "bessel-j0", arg); | |
b70021f4 MR |
310 | return make_float (d); |
311 | } | |
312 | ||
313 | DEFUN ("bessel-j1", Fbessel_j1, Sbessel_j1, 1, 1, 0, | |
314 | "Return the bessel function j1 of ARG.") | |
4b6baf5f RS |
315 | (arg) |
316 | register Lisp_Object arg; | |
b70021f4 | 317 | { |
4b6baf5f RS |
318 | double d = extract_float (arg); |
319 | IN_FLOAT (d = j1 (d), "bessel-j1", arg); | |
b70021f4 MR |
320 | return make_float (d); |
321 | } | |
322 | ||
323 | DEFUN ("bessel-jn", Fbessel_jn, Sbessel_jn, 2, 2, 0, | |
324 | "Return the order N bessel function output jn of ARG.\n\ | |
325 | The first arg (the order) is truncated to an integer.") | |
3e670702 EN |
326 | (n, arg) |
327 | register Lisp_Object n, arg; | |
b70021f4 | 328 | { |
3e670702 EN |
329 | int i1 = extract_float (n); |
330 | double f2 = extract_float (arg); | |
b70021f4 | 331 | |
3e670702 | 332 | IN_FLOAT (f2 = jn (i1, f2), "bessel-jn", n); |
b70021f4 MR |
333 | return make_float (f2); |
334 | } | |
335 | ||
336 | DEFUN ("bessel-y0", Fbessel_y0, Sbessel_y0, 1, 1, 0, | |
337 | "Return the bessel function y0 of ARG.") | |
4b6baf5f RS |
338 | (arg) |
339 | register Lisp_Object arg; | |
b70021f4 | 340 | { |
4b6baf5f RS |
341 | double d = extract_float (arg); |
342 | IN_FLOAT (d = y0 (d), "bessel-y0", arg); | |
b70021f4 MR |
343 | return make_float (d); |
344 | } | |
345 | ||
346 | DEFUN ("bessel-y1", Fbessel_y1, Sbessel_y1, 1, 1, 0, | |
347 | "Return the bessel function y1 of ARG.") | |
4b6baf5f RS |
348 | (arg) |
349 | register Lisp_Object arg; | |
b70021f4 | 350 | { |
4b6baf5f RS |
351 | double d = extract_float (arg); |
352 | IN_FLOAT (d = y1 (d), "bessel-y0", arg); | |
b70021f4 MR |
353 | return make_float (d); |
354 | } | |
355 | ||
356 | DEFUN ("bessel-yn", Fbessel_yn, Sbessel_yn, 2, 2, 0, | |
357 | "Return the order N bessel function output yn of ARG.\n\ | |
358 | The first arg (the order) is truncated to an integer.") | |
3e670702 EN |
359 | (n, arg) |
360 | register Lisp_Object n, arg; | |
b70021f4 | 361 | { |
3e670702 EN |
362 | int i1 = extract_float (n); |
363 | double f2 = extract_float (arg); | |
b70021f4 | 364 | |
3e670702 | 365 | IN_FLOAT (f2 = yn (i1, f2), "bessel-yn", n); |
b70021f4 MR |
366 | return make_float (f2); |
367 | } | |
b70021f4 | 368 | |
c2d4ea74 RS |
369 | #endif |
370 | \f | |
371 | #if 0 /* Leave these out unless we see they are worth having. */ | |
b70021f4 MR |
372 | |
373 | DEFUN ("erf", Ferf, Serf, 1, 1, 0, | |
374 | "Return the mathematical error function of ARG.") | |
4b6baf5f RS |
375 | (arg) |
376 | register Lisp_Object arg; | |
b70021f4 | 377 | { |
4b6baf5f RS |
378 | double d = extract_float (arg); |
379 | IN_FLOAT (d = erf (d), "erf", arg); | |
b70021f4 MR |
380 | return make_float (d); |
381 | } | |
382 | ||
383 | DEFUN ("erfc", Ferfc, Serfc, 1, 1, 0, | |
384 | "Return the complementary error function of ARG.") | |
4b6baf5f RS |
385 | (arg) |
386 | register Lisp_Object arg; | |
b70021f4 | 387 | { |
4b6baf5f RS |
388 | double d = extract_float (arg); |
389 | IN_FLOAT (d = erfc (d), "erfc", arg); | |
b70021f4 MR |
390 | return make_float (d); |
391 | } | |
392 | ||
b70021f4 MR |
393 | DEFUN ("log-gamma", Flog_gamma, Slog_gamma, 1, 1, 0, |
394 | "Return the log gamma of ARG.") | |
4b6baf5f RS |
395 | (arg) |
396 | register Lisp_Object arg; | |
b70021f4 | 397 | { |
4b6baf5f RS |
398 | double d = extract_float (arg); |
399 | IN_FLOAT (d = lgamma (d), "log-gamma", arg); | |
b70021f4 MR |
400 | return make_float (d); |
401 | } | |
402 | ||
4b6baf5f | 403 | DEFUN ("cube-root", Fcube_root, Scube_root, 1, 1, 0, |
c2d4ea74 | 404 | "Return the cube root of ARG.") |
4b6baf5f RS |
405 | (arg) |
406 | register Lisp_Object arg; | |
b70021f4 | 407 | { |
4b6baf5f RS |
408 | double d = extract_float (arg); |
409 | #ifdef HAVE_CBRT | |
410 | IN_FLOAT (d = cbrt (d), "cube-root", arg); | |
411 | #else | |
412 | if (d >= 0.0) | |
413 | IN_FLOAT (d = pow (d, 1.0/3.0), "cube-root", arg); | |
414 | else | |
415 | IN_FLOAT (d = -pow (-d, 1.0/3.0), "cube-root", arg); | |
416 | #endif | |
b70021f4 MR |
417 | return make_float (d); |
418 | } | |
419 | ||
706ac90d RS |
420 | #endif |
421 | \f | |
c2d4ea74 RS |
422 | DEFUN ("exp", Fexp, Sexp, 1, 1, 0, |
423 | "Return the exponential base e of ARG.") | |
4b6baf5f RS |
424 | (arg) |
425 | register Lisp_Object arg; | |
426 | { | |
427 | double d = extract_float (arg); | |
428 | #ifdef FLOAT_CHECK_DOMAIN | |
429 | if (d > 709.7827) /* Assume IEEE doubles here */ | |
430 | range_error ("exp", arg); | |
431 | else if (d < -709.0) | |
432 | return make_float (0.0); | |
433 | else | |
434 | #endif | |
435 | IN_FLOAT (d = exp (d), "exp", arg); | |
b70021f4 MR |
436 | return make_float (d); |
437 | } | |
438 | ||
b70021f4 | 439 | DEFUN ("expt", Fexpt, Sexpt, 2, 2, 0, |
4fd72a6a | 440 | "Return the exponential ARG1 ** ARG2.") |
4b6baf5f RS |
441 | (arg1, arg2) |
442 | register Lisp_Object arg1, arg2; | |
b70021f4 MR |
443 | { |
444 | double f1, f2; | |
445 | ||
4b6baf5f RS |
446 | CHECK_NUMBER_OR_FLOAT (arg1, 0); |
447 | CHECK_NUMBER_OR_FLOAT (arg2, 0); | |
207a45c1 KH |
448 | if (INTEGERP (arg1) /* common lisp spec */ |
449 | && INTEGERP (arg2)) /* don't promote, if both are ints */ | |
b70021f4 | 450 | { /* this can be improved by pre-calculating */ |
9a51b24a | 451 | EMACS_INT acc, x, y; /* some binary powers of x then accumulating */ |
4be1d460 RS |
452 | Lisp_Object val; |
453 | ||
4b6baf5f RS |
454 | x = XINT (arg1); |
455 | y = XINT (arg2); | |
b70021f4 MR |
456 | acc = 1; |
457 | ||
458 | if (y < 0) | |
459 | { | |
4b6baf5f RS |
460 | if (x == 1) |
461 | acc = 1; | |
462 | else if (x == -1) | |
463 | acc = (y & 1) ? -1 : 1; | |
464 | else | |
465 | acc = 0; | |
b70021f4 MR |
466 | } |
467 | else | |
468 | { | |
4b6baf5f RS |
469 | while (y > 0) |
470 | { | |
471 | if (y & 1) | |
472 | acc *= x; | |
473 | x *= x; | |
474 | y = (unsigned)y >> 1; | |
475 | } | |
b70021f4 | 476 | } |
e0cb2a68 | 477 | XSETINT (val, acc); |
4be1d460 | 478 | return val; |
b70021f4 | 479 | } |
70949dac KR |
480 | f1 = FLOATP (arg1) ? XFLOAT_DATA (arg1) : XINT (arg1); |
481 | f2 = FLOATP (arg2) ? XFLOAT_DATA (arg2) : XINT (arg2); | |
4b6baf5f RS |
482 | /* Really should check for overflow, too */ |
483 | if (f1 == 0.0 && f2 == 0.0) | |
484 | f1 = 1.0; | |
485 | #ifdef FLOAT_CHECK_DOMAIN | |
486 | else if ((f1 == 0.0 && f2 < 0.0) || (f1 < 0 && f2 != floor(f2))) | |
487 | domain_error2 ("expt", arg1, arg2); | |
488 | #endif | |
28d849db | 489 | IN_FLOAT2 (f1 = pow (f1, f2), "expt", arg1, arg2); |
b70021f4 MR |
490 | return make_float (f1); |
491 | } | |
c2d4ea74 | 492 | |
56abb480 | 493 | DEFUN ("log", Flog, Slog, 1, 2, 0, |
4b6baf5f RS |
494 | "Return the natural logarithm of ARG.\n\ |
495 | If second optional argument BASE is given, return log ARG using that base.") | |
496 | (arg, base) | |
497 | register Lisp_Object arg, base; | |
b70021f4 | 498 | { |
4b6baf5f | 499 | double d = extract_float (arg); |
56abb480 | 500 | |
4b6baf5f RS |
501 | #ifdef FLOAT_CHECK_DOMAIN |
502 | if (d <= 0.0) | |
503 | domain_error2 ("log", arg, base); | |
504 | #endif | |
56abb480 | 505 | if (NILP (base)) |
4b6baf5f | 506 | IN_FLOAT (d = log (d), "log", arg); |
56abb480 JB |
507 | else |
508 | { | |
509 | double b = extract_float (base); | |
510 | ||
4b6baf5f RS |
511 | #ifdef FLOAT_CHECK_DOMAIN |
512 | if (b <= 0.0 || b == 1.0) | |
513 | domain_error2 ("log", arg, base); | |
514 | #endif | |
515 | if (b == 10.0) | |
516 | IN_FLOAT2 (d = log10 (d), "log", arg, base); | |
517 | else | |
f8131ed2 | 518 | IN_FLOAT2 (d = log (d) / log (b), "log", arg, base); |
56abb480 | 519 | } |
b70021f4 MR |
520 | return make_float (d); |
521 | } | |
522 | ||
c2d4ea74 RS |
523 | DEFUN ("log10", Flog10, Slog10, 1, 1, 0, |
524 | "Return the logarithm base 10 of ARG.") | |
4b6baf5f RS |
525 | (arg) |
526 | register Lisp_Object arg; | |
b70021f4 | 527 | { |
4b6baf5f RS |
528 | double d = extract_float (arg); |
529 | #ifdef FLOAT_CHECK_DOMAIN | |
530 | if (d <= 0.0) | |
531 | domain_error ("log10", arg); | |
532 | #endif | |
533 | IN_FLOAT (d = log10 (d), "log10", arg); | |
c2d4ea74 RS |
534 | return make_float (d); |
535 | } | |
536 | ||
b70021f4 MR |
537 | DEFUN ("sqrt", Fsqrt, Ssqrt, 1, 1, 0, |
538 | "Return the square root of ARG.") | |
4b6baf5f RS |
539 | (arg) |
540 | register Lisp_Object arg; | |
b70021f4 | 541 | { |
4b6baf5f RS |
542 | double d = extract_float (arg); |
543 | #ifdef FLOAT_CHECK_DOMAIN | |
544 | if (d < 0.0) | |
545 | domain_error ("sqrt", arg); | |
546 | #endif | |
547 | IN_FLOAT (d = sqrt (d), "sqrt", arg); | |
b70021f4 MR |
548 | return make_float (d); |
549 | } | |
c2d4ea74 | 550 | \f |
706ac90d | 551 | #if 0 /* Not clearly worth adding. */ |
b70021f4 | 552 | |
c2d4ea74 RS |
553 | DEFUN ("acosh", Facosh, Sacosh, 1, 1, 0, |
554 | "Return the inverse hyperbolic cosine of ARG.") | |
4b6baf5f RS |
555 | (arg) |
556 | register Lisp_Object arg; | |
b70021f4 | 557 | { |
4b6baf5f RS |
558 | double d = extract_float (arg); |
559 | #ifdef FLOAT_CHECK_DOMAIN | |
560 | if (d < 1.0) | |
561 | domain_error ("acosh", arg); | |
562 | #endif | |
563 | #ifdef HAVE_INVERSE_HYPERBOLIC | |
564 | IN_FLOAT (d = acosh (d), "acosh", arg); | |
565 | #else | |
566 | IN_FLOAT (d = log (d + sqrt (d*d - 1.0)), "acosh", arg); | |
567 | #endif | |
c2d4ea74 RS |
568 | return make_float (d); |
569 | } | |
570 | ||
571 | DEFUN ("asinh", Fasinh, Sasinh, 1, 1, 0, | |
572 | "Return the inverse hyperbolic sine of ARG.") | |
4b6baf5f RS |
573 | (arg) |
574 | register Lisp_Object arg; | |
c2d4ea74 | 575 | { |
4b6baf5f RS |
576 | double d = extract_float (arg); |
577 | #ifdef HAVE_INVERSE_HYPERBOLIC | |
578 | IN_FLOAT (d = asinh (d), "asinh", arg); | |
579 | #else | |
580 | IN_FLOAT (d = log (d + sqrt (d*d + 1.0)), "asinh", arg); | |
581 | #endif | |
c2d4ea74 RS |
582 | return make_float (d); |
583 | } | |
584 | ||
585 | DEFUN ("atanh", Fatanh, Satanh, 1, 1, 0, | |
586 | "Return the inverse hyperbolic tangent of ARG.") | |
4b6baf5f RS |
587 | (arg) |
588 | register Lisp_Object arg; | |
c2d4ea74 | 589 | { |
4b6baf5f RS |
590 | double d = extract_float (arg); |
591 | #ifdef FLOAT_CHECK_DOMAIN | |
592 | if (d >= 1.0 || d <= -1.0) | |
593 | domain_error ("atanh", arg); | |
594 | #endif | |
595 | #ifdef HAVE_INVERSE_HYPERBOLIC | |
596 | IN_FLOAT (d = atanh (d), "atanh", arg); | |
597 | #else | |
598 | IN_FLOAT (d = 0.5 * log ((1.0 + d) / (1.0 - d)), "atanh", arg); | |
599 | #endif | |
c2d4ea74 RS |
600 | return make_float (d); |
601 | } | |
602 | ||
603 | DEFUN ("cosh", Fcosh, Scosh, 1, 1, 0, | |
604 | "Return the hyperbolic cosine of ARG.") | |
4b6baf5f RS |
605 | (arg) |
606 | register Lisp_Object arg; | |
c2d4ea74 | 607 | { |
4b6baf5f RS |
608 | double d = extract_float (arg); |
609 | #ifdef FLOAT_CHECK_DOMAIN | |
610 | if (d > 710.0 || d < -710.0) | |
611 | range_error ("cosh", arg); | |
612 | #endif | |
613 | IN_FLOAT (d = cosh (d), "cosh", arg); | |
c2d4ea74 RS |
614 | return make_float (d); |
615 | } | |
616 | ||
617 | DEFUN ("sinh", Fsinh, Ssinh, 1, 1, 0, | |
618 | "Return the hyperbolic sine of ARG.") | |
4b6baf5f RS |
619 | (arg) |
620 | register Lisp_Object arg; | |
c2d4ea74 | 621 | { |
4b6baf5f RS |
622 | double d = extract_float (arg); |
623 | #ifdef FLOAT_CHECK_DOMAIN | |
624 | if (d > 710.0 || d < -710.0) | |
625 | range_error ("sinh", arg); | |
626 | #endif | |
627 | IN_FLOAT (d = sinh (d), "sinh", arg); | |
b70021f4 MR |
628 | return make_float (d); |
629 | } | |
630 | ||
631 | DEFUN ("tanh", Ftanh, Stanh, 1, 1, 0, | |
632 | "Return the hyperbolic tangent of ARG.") | |
4b6baf5f RS |
633 | (arg) |
634 | register Lisp_Object arg; | |
b70021f4 | 635 | { |
4b6baf5f RS |
636 | double d = extract_float (arg); |
637 | IN_FLOAT (d = tanh (d), "tanh", arg); | |
b70021f4 MR |
638 | return make_float (d); |
639 | } | |
c2d4ea74 | 640 | #endif |
b70021f4 MR |
641 | \f |
642 | DEFUN ("abs", Fabs, Sabs, 1, 1, 0, | |
643 | "Return the absolute value of ARG.") | |
4b6baf5f RS |
644 | (arg) |
645 | register Lisp_Object arg; | |
b70021f4 | 646 | { |
4b6baf5f | 647 | CHECK_NUMBER_OR_FLOAT (arg, 0); |
b70021f4 | 648 | |
207a45c1 | 649 | if (FLOATP (arg)) |
70949dac | 650 | IN_FLOAT (arg = make_float (fabs (XFLOAT_DATA (arg))), "abs", arg); |
4b6baf5f | 651 | else if (XINT (arg) < 0) |
db37cb37 | 652 | XSETINT (arg, - XINT (arg)); |
b70021f4 | 653 | |
4b6baf5f | 654 | return arg; |
b70021f4 MR |
655 | } |
656 | ||
657 | DEFUN ("float", Ffloat, Sfloat, 1, 1, 0, | |
658 | "Return the floating point number equal to ARG.") | |
4b6baf5f RS |
659 | (arg) |
660 | register Lisp_Object arg; | |
b70021f4 | 661 | { |
4b6baf5f | 662 | CHECK_NUMBER_OR_FLOAT (arg, 0); |
b70021f4 | 663 | |
207a45c1 | 664 | if (INTEGERP (arg)) |
4b6baf5f | 665 | return make_float ((double) XINT (arg)); |
b70021f4 | 666 | else /* give 'em the same float back */ |
4b6baf5f | 667 | return arg; |
b70021f4 MR |
668 | } |
669 | ||
670 | DEFUN ("logb", Flogb, Slogb, 1, 1, 0, | |
1a3ac8b9 | 671 | "Returns largest integer <= the base 2 log of the magnitude of ARG.\n\ |
b70021f4 | 672 | This is the same as the exponent of a float.") |
4b6baf5f RS |
673 | (arg) |
674 | Lisp_Object arg; | |
b70021f4 | 675 | { |
340176df | 676 | Lisp_Object val; |
a7bf3c54 | 677 | EMACS_INT value; |
5bf54166 | 678 | double f = extract_float (arg); |
340176df | 679 | |
6694b327 KH |
680 | if (f == 0.0) |
681 | value = -(VALMASK >> 1); | |
682 | else | |
683 | { | |
6d3c6adb | 684 | #ifdef HAVE_LOGB |
6694b327 | 685 | IN_FLOAT (value = logb (f), "logb", arg); |
6d3c6adb JB |
686 | #else |
687 | #ifdef HAVE_FREXP | |
c8bf6cf3 KH |
688 | int ivalue; |
689 | IN_FLOAT (frexp (f, &ivalue), "logb", arg); | |
690 | value = ivalue - 1; | |
c26406fe | 691 | #else |
6694b327 KH |
692 | int i; |
693 | double d; | |
694 | if (f < 0.0) | |
695 | f = -f; | |
696 | value = -1; | |
697 | while (f < 0.5) | |
698 | { | |
699 | for (i = 1, d = 0.5; d * d >= f; i += i) | |
700 | d *= d; | |
701 | f /= d; | |
702 | value -= i; | |
703 | } | |
704 | while (f >= 1.0) | |
705 | { | |
706 | for (i = 1, d = 2.0; d * d <= f; i += i) | |
707 | d *= d; | |
708 | f /= d; | |
709 | value += i; | |
710 | } | |
6d3c6adb | 711 | #endif |
340176df | 712 | #endif |
6694b327 | 713 | } |
e0cb2a68 | 714 | XSETINT (val, value); |
c26406fe | 715 | return val; |
b70021f4 MR |
716 | } |
717 | ||
fc2157cb | 718 | |
acbbacbe PE |
719 | /* the rounding functions */ |
720 | ||
721 | static Lisp_Object | |
722 | rounding_driver (arg, divisor, double_round, int_round2, name) | |
fc2157cb | 723 | register Lisp_Object arg, divisor; |
acbbacbe PE |
724 | double (*double_round) (); |
725 | EMACS_INT (*int_round2) (); | |
726 | char *name; | |
b70021f4 | 727 | { |
4b6baf5f | 728 | CHECK_NUMBER_OR_FLOAT (arg, 0); |
b70021f4 | 729 | |
fc2157cb PE |
730 | if (! NILP (divisor)) |
731 | { | |
9a51b24a | 732 | EMACS_INT i1, i2; |
fc2157cb PE |
733 | |
734 | CHECK_NUMBER_OR_FLOAT (divisor, 1); | |
735 | ||
207a45c1 | 736 | if (FLOATP (arg) || FLOATP (divisor)) |
fc2157cb PE |
737 | { |
738 | double f1, f2; | |
739 | ||
70949dac KR |
740 | f1 = FLOATP (arg) ? XFLOAT_DATA (arg) : XINT (arg); |
741 | f2 = (FLOATP (divisor) ? XFLOAT_DATA (divisor) : XINT (divisor)); | |
d137ae2f | 742 | if (! IEEE_FLOATING_POINT && f2 == 0) |
fc2157cb PE |
743 | Fsignal (Qarith_error, Qnil); |
744 | ||
acbbacbe PE |
745 | IN_FLOAT2 (f1 = (*double_round) (f1 / f2), name, arg, divisor); |
746 | FLOAT_TO_INT2 (f1, arg, name, arg, divisor); | |
fc2157cb PE |
747 | return arg; |
748 | } | |
fc2157cb PE |
749 | |
750 | i1 = XINT (arg); | |
751 | i2 = XINT (divisor); | |
752 | ||
753 | if (i2 == 0) | |
754 | Fsignal (Qarith_error, Qnil); | |
755 | ||
acbbacbe | 756 | XSETINT (arg, (*int_round2) (i1, i2)); |
fc2157cb PE |
757 | return arg; |
758 | } | |
759 | ||
207a45c1 | 760 | if (FLOATP (arg)) |
81a63ccc KH |
761 | { |
762 | double d; | |
acbbacbe | 763 | |
70949dac | 764 | IN_FLOAT (d = (*double_round) (XFLOAT_DATA (arg)), name, arg); |
acbbacbe | 765 | FLOAT_TO_INT (d, arg, name, arg); |
81a63ccc | 766 | } |
b70021f4 | 767 | |
4b6baf5f | 768 | return arg; |
b70021f4 MR |
769 | } |
770 | ||
acbbacbe PE |
771 | /* With C's /, the result is implementation-defined if either operand |
772 | is negative, so take care with negative operands in the following | |
773 | integer functions. */ | |
774 | ||
775 | static EMACS_INT | |
776 | ceiling2 (i1, i2) | |
777 | EMACS_INT i1, i2; | |
778 | { | |
779 | return (i2 < 0 | |
780 | ? (i1 < 0 ? ((-1 - i1) / -i2) + 1 : - (i1 / -i2)) | |
781 | : (i1 <= 0 ? - (-i1 / i2) : ((i1 - 1) / i2) + 1)); | |
782 | } | |
783 | ||
784 | static EMACS_INT | |
785 | floor2 (i1, i2) | |
786 | EMACS_INT i1, i2; | |
787 | { | |
788 | return (i2 < 0 | |
789 | ? (i1 <= 0 ? -i1 / -i2 : -1 - ((i1 - 1) / -i2)) | |
790 | : (i1 < 0 ? -1 - ((-1 - i1) / i2) : i1 / i2)); | |
791 | } | |
792 | ||
793 | static EMACS_INT | |
794 | truncate2 (i1, i2) | |
795 | EMACS_INT i1, i2; | |
796 | { | |
797 | return (i2 < 0 | |
798 | ? (i1 < 0 ? -i1 / -i2 : - (i1 / -i2)) | |
799 | : (i1 < 0 ? - (-i1 / i2) : i1 / i2)); | |
800 | } | |
801 | ||
802 | static EMACS_INT | |
803 | round2 (i1, i2) | |
804 | EMACS_INT i1, i2; | |
805 | { | |
806 | /* The C language's division operator gives us one remainder R, but | |
807 | we want the remainder R1 on the other side of 0 if R1 is closer | |
808 | to 0 than R is; because we want to round to even, we also want R1 | |
809 | if R and R1 are the same distance from 0 and if C's quotient is | |
810 | odd. */ | |
811 | EMACS_INT q = i1 / i2; | |
812 | EMACS_INT r = i1 % i2; | |
813 | EMACS_INT abs_r = r < 0 ? -r : r; | |
814 | EMACS_INT abs_r1 = (i2 < 0 ? -i2 : i2) - abs_r; | |
815 | return q + (abs_r + (q & 1) <= abs_r1 ? 0 : (i2 ^ r) < 0 ? -1 : 1); | |
816 | } | |
817 | ||
dca6c914 RS |
818 | /* The code uses emacs_rint, so that it works to undefine HAVE_RINT |
819 | if `rint' exists but does not work right. */ | |
820 | #ifdef HAVE_RINT | |
821 | #define emacs_rint rint | |
822 | #else | |
4b5878a8 | 823 | static double |
dca6c914 | 824 | emacs_rint (d) |
4b5878a8 KH |
825 | double d; |
826 | { | |
1b65c684 | 827 | return floor (d + 0.5); |
4b5878a8 KH |
828 | } |
829 | #endif | |
830 | ||
acbbacbe PE |
831 | static double |
832 | double_identity (d) | |
833 | double d; | |
834 | { | |
835 | return d; | |
836 | } | |
837 | ||
838 | DEFUN ("ceiling", Fceiling, Sceiling, 1, 2, 0, | |
839 | "Return the smallest integer no less than ARG. (Round toward +inf.)\n\ | |
840 | With optional DIVISOR, return the smallest integer no less than ARG/DIVISOR.") | |
841 | (arg, divisor) | |
842 | Lisp_Object arg, divisor; | |
843 | { | |
844 | return rounding_driver (arg, divisor, ceil, ceiling2, "ceiling"); | |
845 | } | |
846 | ||
847 | DEFUN ("floor", Ffloor, Sfloor, 1, 2, 0, | |
848 | "Return the largest integer no greater than ARG. (Round towards -inf.)\n\ | |
849 | With optional DIVISOR, return the largest integer no greater than ARG/DIVISOR.") | |
850 | (arg, divisor) | |
851 | Lisp_Object arg, divisor; | |
852 | { | |
853 | return rounding_driver (arg, divisor, floor, floor2, "floor"); | |
854 | } | |
855 | ||
856 | DEFUN ("round", Fround, Sround, 1, 2, 0, | |
857 | "Return the nearest integer to ARG.\n\ | |
858 | With optional DIVISOR, return the nearest integer to ARG/DIVISOR.") | |
859 | (arg, divisor) | |
860 | Lisp_Object arg, divisor; | |
861 | { | |
dca6c914 | 862 | return rounding_driver (arg, divisor, emacs_rint, round2, "round"); |
acbbacbe PE |
863 | } |
864 | ||
865 | DEFUN ("truncate", Ftruncate, Struncate, 1, 2, 0, | |
866 | "Truncate a floating point number to an int.\n\ | |
867 | Rounds ARG toward zero.\n\ | |
868 | With optional DIVISOR, truncate ARG/DIVISOR.") | |
869 | (arg, divisor) | |
870 | Lisp_Object arg, divisor; | |
871 | { | |
872 | return rounding_driver (arg, divisor, double_identity, truncate2, | |
873 | "truncate"); | |
874 | } | |
875 | ||
fc2157cb | 876 | |
d137ae2f PE |
877 | Lisp_Object |
878 | fmod_float (x, y) | |
879 | register Lisp_Object x, y; | |
880 | { | |
881 | double f1, f2; | |
882 | ||
70949dac KR |
883 | f1 = FLOATP (x) ? XFLOAT_DATA (x) : XINT (x); |
884 | f2 = FLOATP (y) ? XFLOAT_DATA (y) : XINT (y); | |
d137ae2f PE |
885 | |
886 | if (! IEEE_FLOATING_POINT && f2 == 0) | |
887 | Fsignal (Qarith_error, Qnil); | |
888 | ||
889 | /* If the "remainder" comes out with the wrong sign, fix it. */ | |
890 | IN_FLOAT2 ((f1 = fmod (f1, f2), | |
891 | f1 = (f2 < 0 ? f1 > 0 : f1 < 0) ? f1 + f2 : f1), | |
892 | "mod", x, y); | |
893 | return make_float (f1); | |
894 | } | |
4b6baf5f | 895 | \f |
4b6baf5f RS |
896 | /* It's not clear these are worth adding. */ |
897 | ||
898 | DEFUN ("fceiling", Ffceiling, Sfceiling, 1, 1, 0, | |
899 | "Return the smallest integer no less than ARG, as a float.\n\ | |
900 | \(Round toward +inf.\)") | |
901 | (arg) | |
902 | register Lisp_Object arg; | |
903 | { | |
904 | double d = extract_float (arg); | |
905 | IN_FLOAT (d = ceil (d), "fceiling", arg); | |
906 | return make_float (d); | |
907 | } | |
908 | ||
909 | DEFUN ("ffloor", Fffloor, Sffloor, 1, 1, 0, | |
910 | "Return the largest integer no greater than ARG, as a float.\n\ | |
911 | \(Round towards -inf.\)") | |
912 | (arg) | |
913 | register Lisp_Object arg; | |
914 | { | |
915 | double d = extract_float (arg); | |
916 | IN_FLOAT (d = floor (d), "ffloor", arg); | |
917 | return make_float (d); | |
918 | } | |
b70021f4 | 919 | |
4b6baf5f RS |
920 | DEFUN ("fround", Ffround, Sfround, 1, 1, 0, |
921 | "Return the nearest integer to ARG, as a float.") | |
922 | (arg) | |
923 | register Lisp_Object arg; | |
924 | { | |
925 | double d = extract_float (arg); | |
dca6c914 | 926 | IN_FLOAT (d = emacs_rint (d), "fround", arg); |
4b6baf5f RS |
927 | return make_float (d); |
928 | } | |
929 | ||
930 | DEFUN ("ftruncate", Fftruncate, Sftruncate, 1, 1, 0, | |
dca6c914 | 931 | "Truncate a floating point number to an integral float value.\n\ |
4b6baf5f RS |
932 | Rounds the value toward zero.") |
933 | (arg) | |
934 | register Lisp_Object arg; | |
935 | { | |
936 | double d = extract_float (arg); | |
937 | if (d >= 0.0) | |
938 | IN_FLOAT (d = floor (d), "ftruncate", arg); | |
939 | else | |
a3fc5236 | 940 | IN_FLOAT (d = ceil (d), "ftruncate", arg); |
4b6baf5f | 941 | return make_float (d); |
b70021f4 MR |
942 | } |
943 | \f | |
4b6baf5f | 944 | #ifdef FLOAT_CATCH_SIGILL |
4746118a | 945 | static SIGTYPE |
b70021f4 MR |
946 | float_error (signo) |
947 | int signo; | |
948 | { | |
949 | if (! in_float) | |
950 | fatal_error_signal (signo); | |
951 | ||
6df54671 | 952 | #ifdef BSD_SYSTEM |
b70021f4 MR |
953 | #ifdef BSD4_1 |
954 | sigrelse (SIGILL); | |
955 | #else /* not BSD4_1 */ | |
e065a56e | 956 | sigsetmask (SIGEMPTYMASK); |
b70021f4 | 957 | #endif /* not BSD4_1 */ |
265a9e55 JB |
958 | #else |
959 | /* Must reestablish handler each time it is called. */ | |
960 | signal (SIGILL, float_error); | |
6df54671 | 961 | #endif /* BSD_SYSTEM */ |
b70021f4 MR |
962 | |
963 | in_float = 0; | |
964 | ||
965 | Fsignal (Qarith_error, Fcons (float_error_arg, Qnil)); | |
966 | } | |
967 | ||
4b6baf5f RS |
968 | /* Another idea was to replace the library function `infnan' |
969 | where SIGILL is signaled. */ | |
970 | ||
971 | #endif /* FLOAT_CATCH_SIGILL */ | |
972 | ||
973 | #ifdef HAVE_MATHERR | |
974 | int | |
975 | matherr (x) | |
976 | struct exception *x; | |
977 | { | |
978 | Lisp_Object args; | |
979 | if (! in_float) | |
980 | /* Not called from emacs-lisp float routines; do the default thing. */ | |
981 | return 0; | |
982 | if (!strcmp (x->name, "pow")) | |
983 | x->name = "expt"; | |
984 | ||
985 | args | |
986 | = Fcons (build_string (x->name), | |
987 | Fcons (make_float (x->arg1), | |
988 | ((!strcmp (x->name, "log") || !strcmp (x->name, "pow")) | |
989 | ? Fcons (make_float (x->arg2), Qnil) | |
990 | : Qnil))); | |
991 | switch (x->type) | |
992 | { | |
993 | case DOMAIN: Fsignal (Qdomain_error, args); break; | |
994 | case SING: Fsignal (Qsingularity_error, args); break; | |
995 | case OVERFLOW: Fsignal (Qoverflow_error, args); break; | |
996 | case UNDERFLOW: Fsignal (Qunderflow_error, args); break; | |
997 | default: Fsignal (Qarith_error, args); break; | |
998 | } | |
999 | return (1); /* don't set errno or print a message */ | |
1000 | } | |
1001 | #endif /* HAVE_MATHERR */ | |
1002 | ||
dfcf069d | 1003 | void |
b70021f4 MR |
1004 | init_floatfns () |
1005 | { | |
4b6baf5f | 1006 | #ifdef FLOAT_CATCH_SIGILL |
b70021f4 | 1007 | signal (SIGILL, float_error); |
4b6baf5f | 1008 | #endif |
b70021f4 MR |
1009 | in_float = 0; |
1010 | } | |
1011 | ||
dfcf069d | 1012 | void |
b70021f4 MR |
1013 | syms_of_floatfns () |
1014 | { | |
1015 | defsubr (&Sacos); | |
b70021f4 | 1016 | defsubr (&Sasin); |
b70021f4 | 1017 | defsubr (&Satan); |
c2d4ea74 RS |
1018 | defsubr (&Scos); |
1019 | defsubr (&Ssin); | |
1020 | defsubr (&Stan); | |
1021 | #if 0 | |
1022 | defsubr (&Sacosh); | |
1023 | defsubr (&Sasinh); | |
b70021f4 | 1024 | defsubr (&Satanh); |
c2d4ea74 RS |
1025 | defsubr (&Scosh); |
1026 | defsubr (&Ssinh); | |
1027 | defsubr (&Stanh); | |
b70021f4 MR |
1028 | defsubr (&Sbessel_y0); |
1029 | defsubr (&Sbessel_y1); | |
1030 | defsubr (&Sbessel_yn); | |
1031 | defsubr (&Sbessel_j0); | |
1032 | defsubr (&Sbessel_j1); | |
1033 | defsubr (&Sbessel_jn); | |
b70021f4 MR |
1034 | defsubr (&Serf); |
1035 | defsubr (&Serfc); | |
c2d4ea74 | 1036 | defsubr (&Slog_gamma); |
4b6baf5f | 1037 | defsubr (&Scube_root); |
892ed7e0 | 1038 | #endif |
4b6baf5f RS |
1039 | defsubr (&Sfceiling); |
1040 | defsubr (&Sffloor); | |
1041 | defsubr (&Sfround); | |
1042 | defsubr (&Sftruncate); | |
b70021f4 | 1043 | defsubr (&Sexp); |
c2d4ea74 | 1044 | defsubr (&Sexpt); |
b70021f4 MR |
1045 | defsubr (&Slog); |
1046 | defsubr (&Slog10); | |
b70021f4 | 1047 | defsubr (&Ssqrt); |
b70021f4 MR |
1048 | |
1049 | defsubr (&Sabs); | |
1050 | defsubr (&Sfloat); | |
1051 | defsubr (&Slogb); | |
1052 | defsubr (&Sceiling); | |
acbbacbe | 1053 | defsubr (&Sfloor); |
b70021f4 MR |
1054 | defsubr (&Sround); |
1055 | defsubr (&Struncate); | |
1056 | } |