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b70021f4 | 1 | /* Primitive operations on floating point for GNU Emacs Lisp interpreter. |
429ab54e | 2 | Copyright (C) 1988, 1993, 1994, 1999, 2001, 2002, 2003, 2004, |
8cabe764 | 3 | 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
b70021f4 MR |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
b70021f4 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
b70021f4 MR |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
b70021f4 MR |
19 | |
20 | ||
4b6baf5f RS |
21 | /* ANSI C requires only these float functions: |
22 | acos, asin, atan, atan2, ceil, cos, cosh, exp, fabs, floor, fmod, | |
23 | frexp, ldexp, log, log10, modf, pow, sin, sinh, sqrt, tan, tanh. | |
24 | ||
25 | Define HAVE_INVERSE_HYPERBOLIC if you have acosh, asinh, and atanh. | |
26 | Define HAVE_CBRT if you have cbrt. | |
dca6c914 | 27 | Define HAVE_RINT if you have a working rint. |
4b6baf5f RS |
28 | If you don't define these, then the appropriate routines will be simulated. |
29 | ||
30 | Define HAVE_MATHERR if on a system supporting the SysV matherr callback. | |
31 | (This should happen automatically.) | |
32 | ||
33 | Define FLOAT_CHECK_ERRNO if the float library routines set errno. | |
34 | This has no effect if HAVE_MATHERR is defined. | |
35 | ||
36 | Define FLOAT_CATCH_SIGILL if the float library routines signal SIGILL. | |
37 | (What systems actually do this? Please let us know.) | |
38 | ||
39 | Define FLOAT_CHECK_DOMAIN if the float library doesn't handle errors by | |
8e6208c5 | 40 | either setting errno, or signaling SIGFPE/SIGILL. Otherwise, domain and |
4b6baf5f RS |
41 | range checking will happen before calling the float routines. This has |
42 | no effect if HAVE_MATHERR is defined (since matherr will be called when | |
43 | a domain error occurs.) | |
44 | */ | |
45 | ||
18160b98 | 46 | #include <config.h> |
68c45bf0 | 47 | #include <signal.h> |
523e9291 RS |
48 | #include "lisp.h" |
49 | #include "syssignal.h" | |
50 | ||
2f261542 PE |
51 | #if STDC_HEADERS |
52 | #include <float.h> | |
53 | #endif | |
54 | ||
d137ae2f PE |
55 | /* If IEEE_FLOATING_POINT isn't defined, default it from FLT_*. */ |
56 | #ifndef IEEE_FLOATING_POINT | |
57 | #if (FLT_RADIX == 2 && FLT_MANT_DIG == 24 \ | |
58 | && FLT_MIN_EXP == -125 && FLT_MAX_EXP == 128) | |
59 | #define IEEE_FLOATING_POINT 1 | |
60 | #else | |
61 | #define IEEE_FLOATING_POINT 0 | |
62 | #endif | |
63 | #endif | |
64 | ||
b70021f4 | 65 | #include <math.h> |
4b6baf5f | 66 | |
32085e8e | 67 | /* This declaration is omitted on some systems, like Ultrix. */ |
7a4720e2 | 68 | #if !defined (HPUX) && defined (HAVE_LOGB) && !defined (logb) |
c26406fe | 69 | extern double logb (); |
7a4720e2 | 70 | #endif /* not HPUX and HAVE_LOGB and no logb macro */ |
c26406fe | 71 | |
4b6baf5f RS |
72 | #if defined(DOMAIN) && defined(SING) && defined(OVERFLOW) |
73 | /* If those are defined, then this is probably a `matherr' machine. */ | |
74 | # ifndef HAVE_MATHERR | |
75 | # define HAVE_MATHERR | |
76 | # endif | |
77 | #endif | |
78 | ||
c0f0a4a2 | 79 | #ifdef NO_MATHERR |
f89182a2 RS |
80 | #undef HAVE_MATHERR |
81 | #endif | |
82 | ||
4b6baf5f RS |
83 | #ifdef HAVE_MATHERR |
84 | # ifdef FLOAT_CHECK_ERRNO | |
85 | # undef FLOAT_CHECK_ERRNO | |
86 | # endif | |
87 | # ifdef FLOAT_CHECK_DOMAIN | |
88 | # undef FLOAT_CHECK_DOMAIN | |
89 | # endif | |
90 | #endif | |
91 | ||
92 | #ifndef NO_FLOAT_CHECK_ERRNO | |
93 | #define FLOAT_CHECK_ERRNO | |
94 | #endif | |
95 | ||
96 | #ifdef FLOAT_CHECK_ERRNO | |
97 | # include <errno.h> | |
265a9e55 | 98 | |
f12ef5eb | 99 | #ifndef USE_CRT_DLL |
265a9e55 | 100 | extern int errno; |
4b6baf5f | 101 | #endif |
f12ef5eb | 102 | #endif |
265a9e55 | 103 | |
311346bb | 104 | #ifdef FLOAT_CATCH_SIGILL |
4746118a | 105 | static SIGTYPE float_error (); |
311346bb | 106 | #endif |
b70021f4 MR |
107 | |
108 | /* Nonzero while executing in floating point. | |
109 | This tells float_error what to do. */ | |
110 | ||
111 | static int in_float; | |
112 | ||
113 | /* If an argument is out of range for a mathematical function, | |
21876236 RS |
114 | here is the actual argument value to use in the error message. |
115 | These variables are used only across the floating point library call | |
116 | so there is no need to staticpro them. */ | |
b70021f4 | 117 | |
4b6baf5f RS |
118 | static Lisp_Object float_error_arg, float_error_arg2; |
119 | ||
120 | static char *float_error_fn_name; | |
b70021f4 | 121 | |
265a9e55 JB |
122 | /* Evaluate the floating point expression D, recording NUM |
123 | as the original argument for error messages. | |
124 | D is normally an assignment expression. | |
f8d83099 JB |
125 | Handle errors which may result in signals or may set errno. |
126 | ||
127 | Note that float_error may be declared to return void, so you can't | |
128 | just cast the zero after the colon to (SIGTYPE) to make the types | |
129 | check properly. */ | |
265a9e55 | 130 | |
4b6baf5f RS |
131 | #ifdef FLOAT_CHECK_ERRNO |
132 | #define IN_FLOAT(d, name, num) \ | |
133 | do { \ | |
134 | float_error_arg = num; \ | |
135 | float_error_fn_name = name; \ | |
136 | in_float = 1; errno = 0; (d); in_float = 0; \ | |
137 | switch (errno) { \ | |
138 | case 0: break; \ | |
139 | case EDOM: domain_error (float_error_fn_name, float_error_arg); \ | |
140 | case ERANGE: range_error (float_error_fn_name, float_error_arg); \ | |
141 | default: arith_error (float_error_fn_name, float_error_arg); \ | |
142 | } \ | |
143 | } while (0) | |
144 | #define IN_FLOAT2(d, name, num, num2) \ | |
145 | do { \ | |
146 | float_error_arg = num; \ | |
147 | float_error_arg2 = num2; \ | |
148 | float_error_fn_name = name; \ | |
149 | in_float = 1; errno = 0; (d); in_float = 0; \ | |
150 | switch (errno) { \ | |
151 | case 0: break; \ | |
152 | case EDOM: domain_error (float_error_fn_name, float_error_arg); \ | |
153 | case ERANGE: range_error (float_error_fn_name, float_error_arg); \ | |
154 | default: arith_error (float_error_fn_name, float_error_arg); \ | |
155 | } \ | |
156 | } while (0) | |
157 | #else | |
f8131ed2 | 158 | #define IN_FLOAT(d, name, num) (in_float = 1, (d), in_float = 0) |
4b6baf5f RS |
159 | #define IN_FLOAT2(d, name, num, num2) (in_float = 1, (d), in_float = 0) |
160 | #endif | |
161 | ||
81a63ccc KH |
162 | /* Convert float to Lisp_Int if it fits, else signal a range error |
163 | using the given arguments. */ | |
164 | #define FLOAT_TO_INT(x, i, name, num) \ | |
165 | do \ | |
166 | { \ | |
29d823d6 | 167 | if (FIXNUM_OVERFLOW_P (x)) \ |
81a63ccc | 168 | range_error (name, num); \ |
e0cb2a68 | 169 | XSETINT (i, (EMACS_INT)(x)); \ |
81a63ccc KH |
170 | } \ |
171 | while (0) | |
172 | #define FLOAT_TO_INT2(x, i, name, num1, num2) \ | |
173 | do \ | |
174 | { \ | |
29d823d6 | 175 | if (FIXNUM_OVERFLOW_P (x)) \ |
81a63ccc | 176 | range_error2 (name, num1, num2); \ |
e0cb2a68 | 177 | XSETINT (i, (EMACS_INT)(x)); \ |
81a63ccc KH |
178 | } \ |
179 | while (0) | |
180 | ||
4b6baf5f | 181 | #define arith_error(op,arg) \ |
edef1631 | 182 | xsignal2 (Qarith_error, build_string ((op)), (arg)) |
4b6baf5f | 183 | #define range_error(op,arg) \ |
edef1631 | 184 | xsignal2 (Qrange_error, build_string ((op)), (arg)) |
81a63ccc | 185 | #define range_error2(op,a1,a2) \ |
edef1631 | 186 | xsignal3 (Qrange_error, build_string ((op)), (a1), (a2)) |
4b6baf5f | 187 | #define domain_error(op,arg) \ |
edef1631 | 188 | xsignal2 (Qdomain_error, build_string ((op)), (arg)) |
4b6baf5f | 189 | #define domain_error2(op,a1,a2) \ |
edef1631 | 190 | xsignal3 (Qdomain_error, build_string ((op)), (a1), (a2)) |
b70021f4 MR |
191 | |
192 | /* Extract a Lisp number as a `double', or signal an error. */ | |
193 | ||
194 | double | |
195 | extract_float (num) | |
196 | Lisp_Object num; | |
197 | { | |
b7826503 | 198 | CHECK_NUMBER_OR_FLOAT (num); |
b70021f4 | 199 | |
207a45c1 | 200 | if (FLOATP (num)) |
70949dac | 201 | return XFLOAT_DATA (num); |
b70021f4 MR |
202 | return (double) XINT (num); |
203 | } | |
c2d4ea74 RS |
204 | \f |
205 | /* Trig functions. */ | |
b70021f4 MR |
206 | |
207 | DEFUN ("acos", Facos, Sacos, 1, 1, 0, | |
335c5470 PJ |
208 | doc: /* Return the inverse cosine of ARG. */) |
209 | (arg) | |
4b6baf5f | 210 | register Lisp_Object arg; |
b70021f4 | 211 | { |
4b6baf5f RS |
212 | double d = extract_float (arg); |
213 | #ifdef FLOAT_CHECK_DOMAIN | |
214 | if (d > 1.0 || d < -1.0) | |
215 | domain_error ("acos", arg); | |
216 | #endif | |
217 | IN_FLOAT (d = acos (d), "acos", arg); | |
b70021f4 MR |
218 | return make_float (d); |
219 | } | |
220 | ||
c2d4ea74 | 221 | DEFUN ("asin", Fasin, Sasin, 1, 1, 0, |
335c5470 PJ |
222 | doc: /* Return the inverse sine of ARG. */) |
223 | (arg) | |
4b6baf5f | 224 | register Lisp_Object arg; |
b70021f4 | 225 | { |
4b6baf5f RS |
226 | double d = extract_float (arg); |
227 | #ifdef FLOAT_CHECK_DOMAIN | |
228 | if (d > 1.0 || d < -1.0) | |
229 | domain_error ("asin", arg); | |
230 | #endif | |
231 | IN_FLOAT (d = asin (d), "asin", arg); | |
b70021f4 MR |
232 | return make_float (d); |
233 | } | |
234 | ||
250ffca6 EZ |
235 | DEFUN ("atan", Fatan, Satan, 1, 2, 0, |
236 | doc: /* Return the inverse tangent of the arguments. | |
237 | If only one argument Y is given, return the inverse tangent of Y. | |
238 | If two arguments Y and X are given, return the inverse tangent of Y | |
239 | divided by X, i.e. the angle in radians between the vector (X, Y) | |
240 | and the x-axis. */) | |
241 | (y, x) | |
242 | register Lisp_Object y, x; | |
b70021f4 | 243 | { |
250ffca6 EZ |
244 | double d = extract_float (y); |
245 | ||
246 | if (NILP (x)) | |
247 | IN_FLOAT (d = atan (d), "atan", y); | |
248 | else | |
249 | { | |
250 | double d2 = extract_float (x); | |
251 | ||
252 | IN_FLOAT2 (d = atan2 (d, d2), "atan", y, x); | |
253 | } | |
b70021f4 MR |
254 | return make_float (d); |
255 | } | |
256 | ||
c2d4ea74 | 257 | DEFUN ("cos", Fcos, Scos, 1, 1, 0, |
335c5470 PJ |
258 | doc: /* Return the cosine of ARG. */) |
259 | (arg) | |
4b6baf5f | 260 | register Lisp_Object arg; |
b70021f4 | 261 | { |
4b6baf5f RS |
262 | double d = extract_float (arg); |
263 | IN_FLOAT (d = cos (d), "cos", arg); | |
b70021f4 MR |
264 | return make_float (d); |
265 | } | |
266 | ||
c2d4ea74 | 267 | DEFUN ("sin", Fsin, Ssin, 1, 1, 0, |
335c5470 PJ |
268 | doc: /* Return the sine of ARG. */) |
269 | (arg) | |
4b6baf5f | 270 | register Lisp_Object arg; |
b70021f4 | 271 | { |
4b6baf5f RS |
272 | double d = extract_float (arg); |
273 | IN_FLOAT (d = sin (d), "sin", arg); | |
b70021f4 MR |
274 | return make_float (d); |
275 | } | |
276 | ||
c2d4ea74 | 277 | DEFUN ("tan", Ftan, Stan, 1, 1, 0, |
335c5470 PJ |
278 | doc: /* Return the tangent of ARG. */) |
279 | (arg) | |
4b6baf5f RS |
280 | register Lisp_Object arg; |
281 | { | |
282 | double d = extract_float (arg); | |
283 | double c = cos (d); | |
284 | #ifdef FLOAT_CHECK_DOMAIN | |
285 | if (c == 0.0) | |
286 | domain_error ("tan", arg); | |
287 | #endif | |
288 | IN_FLOAT (d = sin (d) / c, "tan", arg); | |
b70021f4 MR |
289 | return make_float (d); |
290 | } | |
291 | \f | |
c2d4ea74 RS |
292 | #if 0 /* Leave these out unless we find there's a reason for them. */ |
293 | ||
b70021f4 | 294 | DEFUN ("bessel-j0", Fbessel_j0, Sbessel_j0, 1, 1, 0, |
335c5470 PJ |
295 | doc: /* Return the bessel function j0 of ARG. */) |
296 | (arg) | |
4b6baf5f | 297 | register Lisp_Object arg; |
b70021f4 | 298 | { |
4b6baf5f RS |
299 | double d = extract_float (arg); |
300 | IN_FLOAT (d = j0 (d), "bessel-j0", arg); | |
b70021f4 MR |
301 | return make_float (d); |
302 | } | |
303 | ||
304 | DEFUN ("bessel-j1", Fbessel_j1, Sbessel_j1, 1, 1, 0, | |
335c5470 PJ |
305 | doc: /* Return the bessel function j1 of ARG. */) |
306 | (arg) | |
4b6baf5f | 307 | register Lisp_Object arg; |
b70021f4 | 308 | { |
4b6baf5f RS |
309 | double d = extract_float (arg); |
310 | IN_FLOAT (d = j1 (d), "bessel-j1", arg); | |
b70021f4 MR |
311 | return make_float (d); |
312 | } | |
313 | ||
314 | DEFUN ("bessel-jn", Fbessel_jn, Sbessel_jn, 2, 2, 0, | |
335c5470 PJ |
315 | doc: /* Return the order N bessel function output jn of ARG. |
316 | The first arg (the order) is truncated to an integer. */) | |
317 | (n, arg) | |
3e670702 | 318 | register Lisp_Object n, arg; |
b70021f4 | 319 | { |
3e670702 EN |
320 | int i1 = extract_float (n); |
321 | double f2 = extract_float (arg); | |
b70021f4 | 322 | |
3e670702 | 323 | IN_FLOAT (f2 = jn (i1, f2), "bessel-jn", n); |
b70021f4 MR |
324 | return make_float (f2); |
325 | } | |
326 | ||
327 | DEFUN ("bessel-y0", Fbessel_y0, Sbessel_y0, 1, 1, 0, | |
335c5470 PJ |
328 | doc: /* Return the bessel function y0 of ARG. */) |
329 | (arg) | |
4b6baf5f | 330 | register Lisp_Object arg; |
b70021f4 | 331 | { |
4b6baf5f RS |
332 | double d = extract_float (arg); |
333 | IN_FLOAT (d = y0 (d), "bessel-y0", arg); | |
b70021f4 MR |
334 | return make_float (d); |
335 | } | |
336 | ||
337 | DEFUN ("bessel-y1", Fbessel_y1, Sbessel_y1, 1, 1, 0, | |
335c5470 PJ |
338 | doc: /* Return the bessel function y1 of ARG. */) |
339 | (arg) | |
4b6baf5f | 340 | register Lisp_Object arg; |
b70021f4 | 341 | { |
4b6baf5f RS |
342 | double d = extract_float (arg); |
343 | IN_FLOAT (d = y1 (d), "bessel-y0", arg); | |
b70021f4 MR |
344 | return make_float (d); |
345 | } | |
346 | ||
347 | DEFUN ("bessel-yn", Fbessel_yn, Sbessel_yn, 2, 2, 0, | |
335c5470 PJ |
348 | doc: /* Return the order N bessel function output yn of ARG. |
349 | The first arg (the order) is truncated to an integer. */) | |
350 | (n, arg) | |
3e670702 | 351 | register Lisp_Object n, arg; |
b70021f4 | 352 | { |
3e670702 EN |
353 | int i1 = extract_float (n); |
354 | double f2 = extract_float (arg); | |
b70021f4 | 355 | |
3e670702 | 356 | IN_FLOAT (f2 = yn (i1, f2), "bessel-yn", n); |
b70021f4 MR |
357 | return make_float (f2); |
358 | } | |
b70021f4 | 359 | |
c2d4ea74 RS |
360 | #endif |
361 | \f | |
362 | #if 0 /* Leave these out unless we see they are worth having. */ | |
b70021f4 MR |
363 | |
364 | DEFUN ("erf", Ferf, Serf, 1, 1, 0, | |
335c5470 PJ |
365 | doc: /* Return the mathematical error function of ARG. */) |
366 | (arg) | |
4b6baf5f | 367 | register Lisp_Object arg; |
b70021f4 | 368 | { |
4b6baf5f RS |
369 | double d = extract_float (arg); |
370 | IN_FLOAT (d = erf (d), "erf", arg); | |
b70021f4 MR |
371 | return make_float (d); |
372 | } | |
373 | ||
374 | DEFUN ("erfc", Ferfc, Serfc, 1, 1, 0, | |
335c5470 PJ |
375 | doc: /* Return the complementary error function of ARG. */) |
376 | (arg) | |
4b6baf5f | 377 | register Lisp_Object arg; |
b70021f4 | 378 | { |
4b6baf5f RS |
379 | double d = extract_float (arg); |
380 | IN_FLOAT (d = erfc (d), "erfc", arg); | |
b70021f4 MR |
381 | return make_float (d); |
382 | } | |
383 | ||
b70021f4 | 384 | DEFUN ("log-gamma", Flog_gamma, Slog_gamma, 1, 1, 0, |
335c5470 PJ |
385 | doc: /* Return the log gamma of ARG. */) |
386 | (arg) | |
4b6baf5f | 387 | register Lisp_Object arg; |
b70021f4 | 388 | { |
4b6baf5f RS |
389 | double d = extract_float (arg); |
390 | IN_FLOAT (d = lgamma (d), "log-gamma", arg); | |
b70021f4 MR |
391 | return make_float (d); |
392 | } | |
393 | ||
4b6baf5f | 394 | DEFUN ("cube-root", Fcube_root, Scube_root, 1, 1, 0, |
335c5470 PJ |
395 | doc: /* Return the cube root of ARG. */) |
396 | (arg) | |
4b6baf5f | 397 | register Lisp_Object arg; |
b70021f4 | 398 | { |
4b6baf5f RS |
399 | double d = extract_float (arg); |
400 | #ifdef HAVE_CBRT | |
401 | IN_FLOAT (d = cbrt (d), "cube-root", arg); | |
402 | #else | |
403 | if (d >= 0.0) | |
404 | IN_FLOAT (d = pow (d, 1.0/3.0), "cube-root", arg); | |
405 | else | |
406 | IN_FLOAT (d = -pow (-d, 1.0/3.0), "cube-root", arg); | |
407 | #endif | |
b70021f4 MR |
408 | return make_float (d); |
409 | } | |
410 | ||
706ac90d RS |
411 | #endif |
412 | \f | |
c2d4ea74 | 413 | DEFUN ("exp", Fexp, Sexp, 1, 1, 0, |
335c5470 PJ |
414 | doc: /* Return the exponential base e of ARG. */) |
415 | (arg) | |
4b6baf5f RS |
416 | register Lisp_Object arg; |
417 | { | |
418 | double d = extract_float (arg); | |
419 | #ifdef FLOAT_CHECK_DOMAIN | |
420 | if (d > 709.7827) /* Assume IEEE doubles here */ | |
421 | range_error ("exp", arg); | |
422 | else if (d < -709.0) | |
423 | return make_float (0.0); | |
424 | else | |
425 | #endif | |
426 | IN_FLOAT (d = exp (d), "exp", arg); | |
b70021f4 MR |
427 | return make_float (d); |
428 | } | |
429 | ||
b70021f4 | 430 | DEFUN ("expt", Fexpt, Sexpt, 2, 2, 0, |
335c5470 PJ |
431 | doc: /* Return the exponential ARG1 ** ARG2. */) |
432 | (arg1, arg2) | |
4b6baf5f | 433 | register Lisp_Object arg1, arg2; |
b70021f4 | 434 | { |
2742fe30 | 435 | double f1, f2, f3; |
b70021f4 | 436 | |
b7826503 PJ |
437 | CHECK_NUMBER_OR_FLOAT (arg1); |
438 | CHECK_NUMBER_OR_FLOAT (arg2); | |
207a45c1 | 439 | if (INTEGERP (arg1) /* common lisp spec */ |
5a9807a8 TTN |
440 | && INTEGERP (arg2) /* don't promote, if both are ints, and */ |
441 | && 0 <= XINT (arg2)) /* we are sure the result is not fractional */ | |
b70021f4 | 442 | { /* this can be improved by pre-calculating */ |
9a51b24a | 443 | EMACS_INT acc, x, y; /* some binary powers of x then accumulating */ |
4be1d460 RS |
444 | Lisp_Object val; |
445 | ||
4b6baf5f RS |
446 | x = XINT (arg1); |
447 | y = XINT (arg2); | |
b70021f4 | 448 | acc = 1; |
177c0ea7 | 449 | |
b70021f4 MR |
450 | if (y < 0) |
451 | { | |
4b6baf5f RS |
452 | if (x == 1) |
453 | acc = 1; | |
454 | else if (x == -1) | |
455 | acc = (y & 1) ? -1 : 1; | |
456 | else | |
457 | acc = 0; | |
b70021f4 MR |
458 | } |
459 | else | |
460 | { | |
4b6baf5f RS |
461 | while (y > 0) |
462 | { | |
463 | if (y & 1) | |
464 | acc *= x; | |
465 | x *= x; | |
466 | y = (unsigned)y >> 1; | |
467 | } | |
b70021f4 | 468 | } |
e0cb2a68 | 469 | XSETINT (val, acc); |
4be1d460 | 470 | return val; |
b70021f4 | 471 | } |
70949dac KR |
472 | f1 = FLOATP (arg1) ? XFLOAT_DATA (arg1) : XINT (arg1); |
473 | f2 = FLOATP (arg2) ? XFLOAT_DATA (arg2) : XINT (arg2); | |
4b6baf5f RS |
474 | /* Really should check for overflow, too */ |
475 | if (f1 == 0.0 && f2 == 0.0) | |
476 | f1 = 1.0; | |
477 | #ifdef FLOAT_CHECK_DOMAIN | |
478 | else if ((f1 == 0.0 && f2 < 0.0) || (f1 < 0 && f2 != floor(f2))) | |
479 | domain_error2 ("expt", arg1, arg2); | |
480 | #endif | |
2742fe30 MC |
481 | IN_FLOAT2 (f3 = pow (f1, f2), "expt", arg1, arg2); |
482 | /* Check for overflow in the result. */ | |
483 | if (f1 != 0.0 && f3 == 0.0) | |
484 | range_error ("expt", arg1); | |
485 | return make_float (f3); | |
b70021f4 | 486 | } |
c2d4ea74 | 487 | |
56abb480 | 488 | DEFUN ("log", Flog, Slog, 1, 2, 0, |
335c5470 | 489 | doc: /* Return the natural logarithm of ARG. |
356e6d8d | 490 | If the optional argument BASE is given, return log ARG using that base. */) |
335c5470 | 491 | (arg, base) |
4b6baf5f | 492 | register Lisp_Object arg, base; |
b70021f4 | 493 | { |
4b6baf5f | 494 | double d = extract_float (arg); |
56abb480 | 495 | |
4b6baf5f RS |
496 | #ifdef FLOAT_CHECK_DOMAIN |
497 | if (d <= 0.0) | |
498 | domain_error2 ("log", arg, base); | |
499 | #endif | |
56abb480 | 500 | if (NILP (base)) |
4b6baf5f | 501 | IN_FLOAT (d = log (d), "log", arg); |
56abb480 JB |
502 | else |
503 | { | |
504 | double b = extract_float (base); | |
505 | ||
4b6baf5f RS |
506 | #ifdef FLOAT_CHECK_DOMAIN |
507 | if (b <= 0.0 || b == 1.0) | |
508 | domain_error2 ("log", arg, base); | |
509 | #endif | |
510 | if (b == 10.0) | |
511 | IN_FLOAT2 (d = log10 (d), "log", arg, base); | |
512 | else | |
f8131ed2 | 513 | IN_FLOAT2 (d = log (d) / log (b), "log", arg, base); |
56abb480 | 514 | } |
b70021f4 MR |
515 | return make_float (d); |
516 | } | |
517 | ||
c2d4ea74 | 518 | DEFUN ("log10", Flog10, Slog10, 1, 1, 0, |
335c5470 PJ |
519 | doc: /* Return the logarithm base 10 of ARG. */) |
520 | (arg) | |
4b6baf5f | 521 | register Lisp_Object arg; |
b70021f4 | 522 | { |
4b6baf5f RS |
523 | double d = extract_float (arg); |
524 | #ifdef FLOAT_CHECK_DOMAIN | |
525 | if (d <= 0.0) | |
526 | domain_error ("log10", arg); | |
527 | #endif | |
528 | IN_FLOAT (d = log10 (d), "log10", arg); | |
c2d4ea74 RS |
529 | return make_float (d); |
530 | } | |
531 | ||
b70021f4 | 532 | DEFUN ("sqrt", Fsqrt, Ssqrt, 1, 1, 0, |
335c5470 PJ |
533 | doc: /* Return the square root of ARG. */) |
534 | (arg) | |
4b6baf5f | 535 | register Lisp_Object arg; |
b70021f4 | 536 | { |
4b6baf5f RS |
537 | double d = extract_float (arg); |
538 | #ifdef FLOAT_CHECK_DOMAIN | |
539 | if (d < 0.0) | |
540 | domain_error ("sqrt", arg); | |
541 | #endif | |
542 | IN_FLOAT (d = sqrt (d), "sqrt", arg); | |
b70021f4 MR |
543 | return make_float (d); |
544 | } | |
c2d4ea74 | 545 | \f |
706ac90d | 546 | #if 0 /* Not clearly worth adding. */ |
b70021f4 | 547 | |
c2d4ea74 | 548 | DEFUN ("acosh", Facosh, Sacosh, 1, 1, 0, |
335c5470 PJ |
549 | doc: /* Return the inverse hyperbolic cosine of ARG. */) |
550 | (arg) | |
4b6baf5f | 551 | register Lisp_Object arg; |
b70021f4 | 552 | { |
4b6baf5f RS |
553 | double d = extract_float (arg); |
554 | #ifdef FLOAT_CHECK_DOMAIN | |
555 | if (d < 1.0) | |
556 | domain_error ("acosh", arg); | |
557 | #endif | |
558 | #ifdef HAVE_INVERSE_HYPERBOLIC | |
559 | IN_FLOAT (d = acosh (d), "acosh", arg); | |
560 | #else | |
561 | IN_FLOAT (d = log (d + sqrt (d*d - 1.0)), "acosh", arg); | |
562 | #endif | |
c2d4ea74 RS |
563 | return make_float (d); |
564 | } | |
565 | ||
566 | DEFUN ("asinh", Fasinh, Sasinh, 1, 1, 0, | |
335c5470 PJ |
567 | doc: /* Return the inverse hyperbolic sine of ARG. */) |
568 | (arg) | |
4b6baf5f | 569 | register Lisp_Object arg; |
c2d4ea74 | 570 | { |
4b6baf5f RS |
571 | double d = extract_float (arg); |
572 | #ifdef HAVE_INVERSE_HYPERBOLIC | |
573 | IN_FLOAT (d = asinh (d), "asinh", arg); | |
574 | #else | |
575 | IN_FLOAT (d = log (d + sqrt (d*d + 1.0)), "asinh", arg); | |
576 | #endif | |
c2d4ea74 RS |
577 | return make_float (d); |
578 | } | |
579 | ||
580 | DEFUN ("atanh", Fatanh, Satanh, 1, 1, 0, | |
335c5470 PJ |
581 | doc: /* Return the inverse hyperbolic tangent of ARG. */) |
582 | (arg) | |
4b6baf5f | 583 | register Lisp_Object arg; |
c2d4ea74 | 584 | { |
4b6baf5f RS |
585 | double d = extract_float (arg); |
586 | #ifdef FLOAT_CHECK_DOMAIN | |
587 | if (d >= 1.0 || d <= -1.0) | |
588 | domain_error ("atanh", arg); | |
589 | #endif | |
590 | #ifdef HAVE_INVERSE_HYPERBOLIC | |
591 | IN_FLOAT (d = atanh (d), "atanh", arg); | |
592 | #else | |
593 | IN_FLOAT (d = 0.5 * log ((1.0 + d) / (1.0 - d)), "atanh", arg); | |
594 | #endif | |
c2d4ea74 RS |
595 | return make_float (d); |
596 | } | |
597 | ||
598 | DEFUN ("cosh", Fcosh, Scosh, 1, 1, 0, | |
335c5470 PJ |
599 | doc: /* Return the hyperbolic cosine of ARG. */) |
600 | (arg) | |
4b6baf5f | 601 | register Lisp_Object arg; |
c2d4ea74 | 602 | { |
4b6baf5f RS |
603 | double d = extract_float (arg); |
604 | #ifdef FLOAT_CHECK_DOMAIN | |
605 | if (d > 710.0 || d < -710.0) | |
606 | range_error ("cosh", arg); | |
607 | #endif | |
608 | IN_FLOAT (d = cosh (d), "cosh", arg); | |
c2d4ea74 RS |
609 | return make_float (d); |
610 | } | |
611 | ||
612 | DEFUN ("sinh", Fsinh, Ssinh, 1, 1, 0, | |
335c5470 PJ |
613 | doc: /* Return the hyperbolic sine of ARG. */) |
614 | (arg) | |
4b6baf5f | 615 | register Lisp_Object arg; |
c2d4ea74 | 616 | { |
4b6baf5f RS |
617 | double d = extract_float (arg); |
618 | #ifdef FLOAT_CHECK_DOMAIN | |
619 | if (d > 710.0 || d < -710.0) | |
620 | range_error ("sinh", arg); | |
621 | #endif | |
622 | IN_FLOAT (d = sinh (d), "sinh", arg); | |
b70021f4 MR |
623 | return make_float (d); |
624 | } | |
625 | ||
626 | DEFUN ("tanh", Ftanh, Stanh, 1, 1, 0, | |
335c5470 PJ |
627 | doc: /* Return the hyperbolic tangent of ARG. */) |
628 | (arg) | |
4b6baf5f | 629 | register Lisp_Object arg; |
b70021f4 | 630 | { |
4b6baf5f RS |
631 | double d = extract_float (arg); |
632 | IN_FLOAT (d = tanh (d), "tanh", arg); | |
b70021f4 MR |
633 | return make_float (d); |
634 | } | |
c2d4ea74 | 635 | #endif |
b70021f4 MR |
636 | \f |
637 | DEFUN ("abs", Fabs, Sabs, 1, 1, 0, | |
335c5470 PJ |
638 | doc: /* Return the absolute value of ARG. */) |
639 | (arg) | |
4b6baf5f | 640 | register Lisp_Object arg; |
b70021f4 | 641 | { |
b7826503 | 642 | CHECK_NUMBER_OR_FLOAT (arg); |
b70021f4 | 643 | |
207a45c1 | 644 | if (FLOATP (arg)) |
70949dac | 645 | IN_FLOAT (arg = make_float (fabs (XFLOAT_DATA (arg))), "abs", arg); |
4b6baf5f | 646 | else if (XINT (arg) < 0) |
db37cb37 | 647 | XSETINT (arg, - XINT (arg)); |
b70021f4 | 648 | |
4b6baf5f | 649 | return arg; |
b70021f4 MR |
650 | } |
651 | ||
652 | DEFUN ("float", Ffloat, Sfloat, 1, 1, 0, | |
335c5470 PJ |
653 | doc: /* Return the floating point number equal to ARG. */) |
654 | (arg) | |
4b6baf5f | 655 | register Lisp_Object arg; |
b70021f4 | 656 | { |
b7826503 | 657 | CHECK_NUMBER_OR_FLOAT (arg); |
b70021f4 | 658 | |
207a45c1 | 659 | if (INTEGERP (arg)) |
4b6baf5f | 660 | return make_float ((double) XINT (arg)); |
b70021f4 | 661 | else /* give 'em the same float back */ |
4b6baf5f | 662 | return arg; |
b70021f4 MR |
663 | } |
664 | ||
665 | DEFUN ("logb", Flogb, Slogb, 1, 1, 0, | |
335c5470 PJ |
666 | doc: /* Returns largest integer <= the base 2 log of the magnitude of ARG. |
667 | This is the same as the exponent of a float. */) | |
4b6baf5f RS |
668 | (arg) |
669 | Lisp_Object arg; | |
b70021f4 | 670 | { |
340176df | 671 | Lisp_Object val; |
a7bf3c54 | 672 | EMACS_INT value; |
5bf54166 | 673 | double f = extract_float (arg); |
340176df | 674 | |
6694b327 | 675 | if (f == 0.0) |
b916d672 | 676 | value = MOST_NEGATIVE_FIXNUM; |
6694b327 KH |
677 | else |
678 | { | |
6d3c6adb | 679 | #ifdef HAVE_LOGB |
6694b327 | 680 | IN_FLOAT (value = logb (f), "logb", arg); |
6d3c6adb JB |
681 | #else |
682 | #ifdef HAVE_FREXP | |
c8bf6cf3 KH |
683 | int ivalue; |
684 | IN_FLOAT (frexp (f, &ivalue), "logb", arg); | |
685 | value = ivalue - 1; | |
c26406fe | 686 | #else |
6694b327 KH |
687 | int i; |
688 | double d; | |
689 | if (f < 0.0) | |
690 | f = -f; | |
691 | value = -1; | |
692 | while (f < 0.5) | |
693 | { | |
694 | for (i = 1, d = 0.5; d * d >= f; i += i) | |
695 | d *= d; | |
696 | f /= d; | |
697 | value -= i; | |
698 | } | |
699 | while (f >= 1.0) | |
700 | { | |
701 | for (i = 1, d = 2.0; d * d <= f; i += i) | |
702 | d *= d; | |
703 | f /= d; | |
704 | value += i; | |
705 | } | |
6d3c6adb | 706 | #endif |
340176df | 707 | #endif |
6694b327 | 708 | } |
e0cb2a68 | 709 | XSETINT (val, value); |
c26406fe | 710 | return val; |
b70021f4 MR |
711 | } |
712 | ||
fc2157cb | 713 | |
acbbacbe PE |
714 | /* the rounding functions */ |
715 | ||
716 | static Lisp_Object | |
717 | rounding_driver (arg, divisor, double_round, int_round2, name) | |
fc2157cb | 718 | register Lisp_Object arg, divisor; |
acbbacbe PE |
719 | double (*double_round) (); |
720 | EMACS_INT (*int_round2) (); | |
721 | char *name; | |
b70021f4 | 722 | { |
b7826503 | 723 | CHECK_NUMBER_OR_FLOAT (arg); |
b70021f4 | 724 | |
fc2157cb PE |
725 | if (! NILP (divisor)) |
726 | { | |
9a51b24a | 727 | EMACS_INT i1, i2; |
fc2157cb | 728 | |
b7826503 | 729 | CHECK_NUMBER_OR_FLOAT (divisor); |
fc2157cb | 730 | |
207a45c1 | 731 | if (FLOATP (arg) || FLOATP (divisor)) |
fc2157cb PE |
732 | { |
733 | double f1, f2; | |
734 | ||
70949dac KR |
735 | f1 = FLOATP (arg) ? XFLOAT_DATA (arg) : XINT (arg); |
736 | f2 = (FLOATP (divisor) ? XFLOAT_DATA (divisor) : XINT (divisor)); | |
d137ae2f | 737 | if (! IEEE_FLOATING_POINT && f2 == 0) |
edef1631 | 738 | xsignal0 (Qarith_error); |
fc2157cb | 739 | |
acbbacbe PE |
740 | IN_FLOAT2 (f1 = (*double_round) (f1 / f2), name, arg, divisor); |
741 | FLOAT_TO_INT2 (f1, arg, name, arg, divisor); | |
fc2157cb PE |
742 | return arg; |
743 | } | |
fc2157cb PE |
744 | |
745 | i1 = XINT (arg); | |
746 | i2 = XINT (divisor); | |
747 | ||
748 | if (i2 == 0) | |
edef1631 | 749 | xsignal0 (Qarith_error); |
fc2157cb | 750 | |
acbbacbe | 751 | XSETINT (arg, (*int_round2) (i1, i2)); |
fc2157cb PE |
752 | return arg; |
753 | } | |
754 | ||
207a45c1 | 755 | if (FLOATP (arg)) |
81a63ccc KH |
756 | { |
757 | double d; | |
acbbacbe | 758 | |
70949dac | 759 | IN_FLOAT (d = (*double_round) (XFLOAT_DATA (arg)), name, arg); |
acbbacbe | 760 | FLOAT_TO_INT (d, arg, name, arg); |
81a63ccc | 761 | } |
b70021f4 | 762 | |
4b6baf5f | 763 | return arg; |
b70021f4 MR |
764 | } |
765 | ||
acbbacbe PE |
766 | /* With C's /, the result is implementation-defined if either operand |
767 | is negative, so take care with negative operands in the following | |
768 | integer functions. */ | |
769 | ||
770 | static EMACS_INT | |
771 | ceiling2 (i1, i2) | |
772 | EMACS_INT i1, i2; | |
773 | { | |
774 | return (i2 < 0 | |
775 | ? (i1 < 0 ? ((-1 - i1) / -i2) + 1 : - (i1 / -i2)) | |
776 | : (i1 <= 0 ? - (-i1 / i2) : ((i1 - 1) / i2) + 1)); | |
777 | } | |
778 | ||
779 | static EMACS_INT | |
780 | floor2 (i1, i2) | |
781 | EMACS_INT i1, i2; | |
782 | { | |
783 | return (i2 < 0 | |
784 | ? (i1 <= 0 ? -i1 / -i2 : -1 - ((i1 - 1) / -i2)) | |
785 | : (i1 < 0 ? -1 - ((-1 - i1) / i2) : i1 / i2)); | |
786 | } | |
787 | ||
788 | static EMACS_INT | |
789 | truncate2 (i1, i2) | |
790 | EMACS_INT i1, i2; | |
791 | { | |
792 | return (i2 < 0 | |
793 | ? (i1 < 0 ? -i1 / -i2 : - (i1 / -i2)) | |
794 | : (i1 < 0 ? - (-i1 / i2) : i1 / i2)); | |
795 | } | |
796 | ||
797 | static EMACS_INT | |
798 | round2 (i1, i2) | |
799 | EMACS_INT i1, i2; | |
800 | { | |
801 | /* The C language's division operator gives us one remainder R, but | |
802 | we want the remainder R1 on the other side of 0 if R1 is closer | |
803 | to 0 than R is; because we want to round to even, we also want R1 | |
804 | if R and R1 are the same distance from 0 and if C's quotient is | |
805 | odd. */ | |
806 | EMACS_INT q = i1 / i2; | |
807 | EMACS_INT r = i1 % i2; | |
808 | EMACS_INT abs_r = r < 0 ? -r : r; | |
809 | EMACS_INT abs_r1 = (i2 < 0 ? -i2 : i2) - abs_r; | |
810 | return q + (abs_r + (q & 1) <= abs_r1 ? 0 : (i2 ^ r) < 0 ? -1 : 1); | |
811 | } | |
812 | ||
dca6c914 RS |
813 | /* The code uses emacs_rint, so that it works to undefine HAVE_RINT |
814 | if `rint' exists but does not work right. */ | |
815 | #ifdef HAVE_RINT | |
816 | #define emacs_rint rint | |
817 | #else | |
4b5878a8 | 818 | static double |
dca6c914 | 819 | emacs_rint (d) |
4b5878a8 KH |
820 | double d; |
821 | { | |
1b65c684 | 822 | return floor (d + 0.5); |
4b5878a8 KH |
823 | } |
824 | #endif | |
825 | ||
acbbacbe PE |
826 | static double |
827 | double_identity (d) | |
828 | double d; | |
829 | { | |
830 | return d; | |
831 | } | |
832 | ||
833 | DEFUN ("ceiling", Fceiling, Sceiling, 1, 2, 0, | |
1d6ea92f RS |
834 | doc: /* Return the smallest integer no less than ARG. |
835 | This rounds the value towards +inf. | |
335c5470 PJ |
836 | With optional DIVISOR, return the smallest integer no less than ARG/DIVISOR. */) |
837 | (arg, divisor) | |
acbbacbe PE |
838 | Lisp_Object arg, divisor; |
839 | { | |
840 | return rounding_driver (arg, divisor, ceil, ceiling2, "ceiling"); | |
841 | } | |
842 | ||
843 | DEFUN ("floor", Ffloor, Sfloor, 1, 2, 0, | |
1d6ea92f | 844 | doc: /* Return the largest integer no greater than ARG. |
568b6e41 | 845 | This rounds the value towards -inf. |
335c5470 PJ |
846 | With optional DIVISOR, return the largest integer no greater than ARG/DIVISOR. */) |
847 | (arg, divisor) | |
acbbacbe PE |
848 | Lisp_Object arg, divisor; |
849 | { | |
850 | return rounding_driver (arg, divisor, floor, floor2, "floor"); | |
851 | } | |
852 | ||
853 | DEFUN ("round", Fround, Sround, 1, 2, 0, | |
335c5470 | 854 | doc: /* Return the nearest integer to ARG. |
6ded2c89 EZ |
855 | With optional DIVISOR, return the nearest integer to ARG/DIVISOR. |
856 | ||
a32a4857 EZ |
857 | Rounding a value equidistant between two integers may choose the |
858 | integer closer to zero, or it may prefer an even integer, depending on | |
859 | your machine. For example, \(round 2.5\) can return 3 on some | |
59fe0cee | 860 | systems, but 2 on others. */) |
335c5470 | 861 | (arg, divisor) |
acbbacbe PE |
862 | Lisp_Object arg, divisor; |
863 | { | |
dca6c914 | 864 | return rounding_driver (arg, divisor, emacs_rint, round2, "round"); |
acbbacbe PE |
865 | } |
866 | ||
867 | DEFUN ("truncate", Ftruncate, Struncate, 1, 2, 0, | |
335c5470 PJ |
868 | doc: /* Truncate a floating point number to an int. |
869 | Rounds ARG toward zero. | |
870 | With optional DIVISOR, truncate ARG/DIVISOR. */) | |
871 | (arg, divisor) | |
acbbacbe PE |
872 | Lisp_Object arg, divisor; |
873 | { | |
874 | return rounding_driver (arg, divisor, double_identity, truncate2, | |
875 | "truncate"); | |
876 | } | |
877 | ||
fc2157cb | 878 | |
d137ae2f PE |
879 | Lisp_Object |
880 | fmod_float (x, y) | |
881 | register Lisp_Object x, y; | |
882 | { | |
883 | double f1, f2; | |
884 | ||
70949dac KR |
885 | f1 = FLOATP (x) ? XFLOAT_DATA (x) : XINT (x); |
886 | f2 = FLOATP (y) ? XFLOAT_DATA (y) : XINT (y); | |
d137ae2f PE |
887 | |
888 | if (! IEEE_FLOATING_POINT && f2 == 0) | |
edef1631 | 889 | xsignal0 (Qarith_error); |
d137ae2f PE |
890 | |
891 | /* If the "remainder" comes out with the wrong sign, fix it. */ | |
892 | IN_FLOAT2 ((f1 = fmod (f1, f2), | |
893 | f1 = (f2 < 0 ? f1 > 0 : f1 < 0) ? f1 + f2 : f1), | |
894 | "mod", x, y); | |
895 | return make_float (f1); | |
896 | } | |
4b6baf5f | 897 | \f |
4b6baf5f RS |
898 | /* It's not clear these are worth adding. */ |
899 | ||
900 | DEFUN ("fceiling", Ffceiling, Sfceiling, 1, 1, 0, | |
335c5470 PJ |
901 | doc: /* Return the smallest integer no less than ARG, as a float. |
902 | \(Round toward +inf.\) */) | |
903 | (arg) | |
4b6baf5f RS |
904 | register Lisp_Object arg; |
905 | { | |
906 | double d = extract_float (arg); | |
907 | IN_FLOAT (d = ceil (d), "fceiling", arg); | |
908 | return make_float (d); | |
909 | } | |
910 | ||
911 | DEFUN ("ffloor", Fffloor, Sffloor, 1, 1, 0, | |
335c5470 PJ |
912 | doc: /* Return the largest integer no greater than ARG, as a float. |
913 | \(Round towards -inf.\) */) | |
914 | (arg) | |
4b6baf5f RS |
915 | register Lisp_Object arg; |
916 | { | |
917 | double d = extract_float (arg); | |
918 | IN_FLOAT (d = floor (d), "ffloor", arg); | |
919 | return make_float (d); | |
920 | } | |
b70021f4 | 921 | |
4b6baf5f | 922 | DEFUN ("fround", Ffround, Sfround, 1, 1, 0, |
335c5470 PJ |
923 | doc: /* Return the nearest integer to ARG, as a float. */) |
924 | (arg) | |
4b6baf5f RS |
925 | register Lisp_Object arg; |
926 | { | |
927 | double d = extract_float (arg); | |
dca6c914 | 928 | IN_FLOAT (d = emacs_rint (d), "fround", arg); |
4b6baf5f RS |
929 | return make_float (d); |
930 | } | |
931 | ||
932 | DEFUN ("ftruncate", Fftruncate, Sftruncate, 1, 1, 0, | |
335c5470 PJ |
933 | doc: /* Truncate a floating point number to an integral float value. |
934 | Rounds the value toward zero. */) | |
935 | (arg) | |
4b6baf5f RS |
936 | register Lisp_Object arg; |
937 | { | |
938 | double d = extract_float (arg); | |
939 | if (d >= 0.0) | |
940 | IN_FLOAT (d = floor (d), "ftruncate", arg); | |
941 | else | |
a3fc5236 | 942 | IN_FLOAT (d = ceil (d), "ftruncate", arg); |
4b6baf5f | 943 | return make_float (d); |
b70021f4 MR |
944 | } |
945 | \f | |
4b6baf5f | 946 | #ifdef FLOAT_CATCH_SIGILL |
4746118a | 947 | static SIGTYPE |
b70021f4 MR |
948 | float_error (signo) |
949 | int signo; | |
950 | { | |
951 | if (! in_float) | |
952 | fatal_error_signal (signo); | |
953 | ||
6df54671 | 954 | #ifdef BSD_SYSTEM |
e065a56e | 955 | sigsetmask (SIGEMPTYMASK); |
265a9e55 JB |
956 | #else |
957 | /* Must reestablish handler each time it is called. */ | |
958 | signal (SIGILL, float_error); | |
6df54671 | 959 | #endif /* BSD_SYSTEM */ |
b70021f4 | 960 | |
333f1b6f | 961 | SIGNAL_THREAD_CHECK (signo); |
b70021f4 MR |
962 | in_float = 0; |
963 | ||
edef1631 | 964 | xsignal1 (Qarith_error, float_error_arg); |
b70021f4 MR |
965 | } |
966 | ||
4b6baf5f RS |
967 | /* Another idea was to replace the library function `infnan' |
968 | where SIGILL is signaled. */ | |
969 | ||
970 | #endif /* FLOAT_CATCH_SIGILL */ | |
971 | ||
972 | #ifdef HAVE_MATHERR | |
177c0ea7 | 973 | int |
4b6baf5f RS |
974 | matherr (x) |
975 | struct exception *x; | |
976 | { | |
977 | Lisp_Object args; | |
978 | if (! in_float) | |
979 | /* Not called from emacs-lisp float routines; do the default thing. */ | |
980 | return 0; | |
981 | if (!strcmp (x->name, "pow")) | |
982 | x->name = "expt"; | |
983 | ||
984 | args | |
985 | = Fcons (build_string (x->name), | |
986 | Fcons (make_float (x->arg1), | |
987 | ((!strcmp (x->name, "log") || !strcmp (x->name, "pow")) | |
988 | ? Fcons (make_float (x->arg2), Qnil) | |
989 | : Qnil))); | |
990 | switch (x->type) | |
991 | { | |
edef1631 KS |
992 | case DOMAIN: xsignal (Qdomain_error, args); break; |
993 | case SING: xsignal (Qsingularity_error, args); break; | |
994 | case OVERFLOW: xsignal (Qoverflow_error, args); break; | |
995 | case UNDERFLOW: xsignal (Qunderflow_error, args); break; | |
996 | default: xsignal (Qarith_error, args); break; | |
4b6baf5f RS |
997 | } |
998 | return (1); /* don't set errno or print a message */ | |
999 | } | |
1000 | #endif /* HAVE_MATHERR */ | |
1001 | ||
dfcf069d | 1002 | void |
b70021f4 MR |
1003 | init_floatfns () |
1004 | { | |
4b6baf5f | 1005 | #ifdef FLOAT_CATCH_SIGILL |
b70021f4 | 1006 | signal (SIGILL, float_error); |
177c0ea7 | 1007 | #endif |
b70021f4 MR |
1008 | in_float = 0; |
1009 | } | |
1010 | ||
dfcf069d | 1011 | void |
b70021f4 MR |
1012 | syms_of_floatfns () |
1013 | { | |
1014 | defsubr (&Sacos); | |
b70021f4 | 1015 | defsubr (&Sasin); |
b70021f4 | 1016 | defsubr (&Satan); |
c2d4ea74 RS |
1017 | defsubr (&Scos); |
1018 | defsubr (&Ssin); | |
1019 | defsubr (&Stan); | |
1020 | #if 0 | |
1021 | defsubr (&Sacosh); | |
1022 | defsubr (&Sasinh); | |
b70021f4 | 1023 | defsubr (&Satanh); |
c2d4ea74 RS |
1024 | defsubr (&Scosh); |
1025 | defsubr (&Ssinh); | |
1026 | defsubr (&Stanh); | |
b70021f4 MR |
1027 | defsubr (&Sbessel_y0); |
1028 | defsubr (&Sbessel_y1); | |
1029 | defsubr (&Sbessel_yn); | |
1030 | defsubr (&Sbessel_j0); | |
1031 | defsubr (&Sbessel_j1); | |
1032 | defsubr (&Sbessel_jn); | |
b70021f4 MR |
1033 | defsubr (&Serf); |
1034 | defsubr (&Serfc); | |
c2d4ea74 | 1035 | defsubr (&Slog_gamma); |
4b6baf5f | 1036 | defsubr (&Scube_root); |
892ed7e0 | 1037 | #endif |
4b6baf5f RS |
1038 | defsubr (&Sfceiling); |
1039 | defsubr (&Sffloor); | |
1040 | defsubr (&Sfround); | |
1041 | defsubr (&Sftruncate); | |
b70021f4 | 1042 | defsubr (&Sexp); |
c2d4ea74 | 1043 | defsubr (&Sexpt); |
b70021f4 MR |
1044 | defsubr (&Slog); |
1045 | defsubr (&Slog10); | |
b70021f4 | 1046 | defsubr (&Ssqrt); |
b70021f4 MR |
1047 | |
1048 | defsubr (&Sabs); | |
1049 | defsubr (&Sfloat); | |
1050 | defsubr (&Slogb); | |
1051 | defsubr (&Sceiling); | |
acbbacbe | 1052 | defsubr (&Sfloor); |
b70021f4 MR |
1053 | defsubr (&Sround); |
1054 | defsubr (&Struncate); | |
1055 | } | |
ab5796a9 MB |
1056 | |
1057 | /* arch-tag: be05bf9d-049e-4e31-91b9-e6153d483ae7 | |
1058 | (do not change this comment) */ |