Commit | Line | Data |
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8f5cfc81 | 1 | /* Copyright (C) 2001 Free Software Foundation, Inc. |
a98cef7e KN |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, | |
16 | * Boston, MA 02111-1307 USA | |
17 | * | |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
40 | * If you do not wish that, delete this exception notice. */ | |
41 | ||
42 | /* This file is included in vm_engine.c */ | |
43 | ||
a98cef7e KN |
44 | \f |
45 | /* | |
46 | * Basic operations | |
47 | */ | |
48 | ||
17e90c5e | 49 | /* This must be the first instruction! */ |
46cd9a34 | 50 | VM_DEFINE_INSTRUCTION (nop, "nop", 0, 0, 0) |
a98cef7e KN |
51 | { |
52 | NEXT; | |
53 | } | |
54 | ||
46cd9a34 | 55 | VM_DEFINE_INSTRUCTION (halt, "halt", 0, 0, 0) |
a98cef7e | 56 | { |
a6df585a | 57 | SCM ret; |
3d5ee0cd | 58 | vp->time += scm_c_get_internal_run_time () - start_time; |
17e90c5e | 59 | HALT_HOOK (); |
a222b0fa | 60 | nvalues = SCM_I_INUM (*sp--); |
11ea1aba | 61 | NULLSTACK (1); |
a222b0fa AW |
62 | if (nvalues == 1) |
63 | POP (ret); | |
64 | else | |
65 | { | |
66 | POP_LIST (nvalues); | |
67 | POP (ret); | |
877ffa3f | 68 | SYNC_REGISTER (); |
a222b0fa AW |
69 | ret = scm_values (ret); |
70 | } | |
71 | ||
1dc8f851 | 72 | { |
11ea1aba AW |
73 | ASSERT (sp == stack_base); |
74 | ASSERT (stack_base == SCM_FRAME_UPPER_ADDRESS (fp) - 1); | |
1dc8f851 AW |
75 | |
76 | /* Restore registers */ | |
77 | sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1; | |
78 | ip = NULL; | |
79 | fp = SCM_FRAME_DYNAMIC_LINK (fp); | |
11ea1aba | 80 | NULLSTACK (stack_base - sp); |
1dc8f851 | 81 | } |
17e90c5e | 82 | SYNC_ALL (); |
17d1b4bf | 83 | scm_dynwind_end (); |
17e90c5e | 84 | return ret; |
a98cef7e KN |
85 | } |
86 | ||
7a0d0cee KN |
87 | VM_DEFINE_INSTRUCTION (break, "break", 0, 0, 0) |
88 | { | |
89 | BREAK_HOOK (); | |
90 | NEXT; | |
91 | } | |
92 | ||
499a4c07 | 93 | VM_DEFINE_INSTRUCTION (drop, "drop", 0, 0, 0) |
a98cef7e | 94 | { |
17e90c5e | 95 | DROP (); |
a98cef7e KN |
96 | NEXT; |
97 | } | |
98 | ||
cb4cca12 KN |
99 | VM_DEFINE_INSTRUCTION (mark, "mark", 0, 0, 1) |
100 | { | |
101 | PUSH (SCM_UNDEFINED); | |
102 | NEXT; | |
103 | } | |
104 | ||
46cd9a34 | 105 | VM_DEFINE_INSTRUCTION (dup, "dup", 0, 0, 1) |
26403690 | 106 | { |
f349065e KN |
107 | SCM x = *sp; |
108 | PUSH (x); | |
26403690 KN |
109 | NEXT; |
110 | } | |
111 | ||
17e90c5e KN |
112 | \f |
113 | /* | |
114 | * Object creation | |
115 | */ | |
a98cef7e | 116 | |
46cd9a34 | 117 | VM_DEFINE_INSTRUCTION (void, "void", 0, 0, 1) |
a98cef7e | 118 | { |
17e90c5e | 119 | PUSH (SCM_UNSPECIFIED); |
a98cef7e KN |
120 | NEXT; |
121 | } | |
122 | ||
46cd9a34 | 123 | VM_DEFINE_INSTRUCTION (make_true, "make-true", 0, 0, 1) |
a98cef7e | 124 | { |
17e90c5e | 125 | PUSH (SCM_BOOL_T); |
a98cef7e KN |
126 | NEXT; |
127 | } | |
128 | ||
46cd9a34 | 129 | VM_DEFINE_INSTRUCTION (make_false, "make-false", 0, 0, 1) |
a98cef7e | 130 | { |
17e90c5e | 131 | PUSH (SCM_BOOL_F); |
a98cef7e KN |
132 | NEXT; |
133 | } | |
134 | ||
46cd9a34 | 135 | VM_DEFINE_INSTRUCTION (make_eol, "make-eol", 0, 0, 1) |
a98cef7e | 136 | { |
17e90c5e | 137 | PUSH (SCM_EOL); |
a98cef7e KN |
138 | NEXT; |
139 | } | |
140 | ||
46cd9a34 | 141 | VM_DEFINE_INSTRUCTION (make_int8, "make-int8", 1, 0, 1) |
a98cef7e | 142 | { |
2d80426a | 143 | PUSH (SCM_I_MAKINUM ((signed char) FETCH ())); |
a98cef7e KN |
144 | NEXT; |
145 | } | |
146 | ||
46cd9a34 | 147 | VM_DEFINE_INSTRUCTION (make_int8_0, "make-int8:0", 0, 0, 1) |
a98cef7e | 148 | { |
238e7a11 | 149 | PUSH (SCM_INUM0); |
a98cef7e KN |
150 | NEXT; |
151 | } | |
152 | ||
46cd9a34 | 153 | VM_DEFINE_INSTRUCTION (make_int8_1, "make-int8:1", 0, 0, 1) |
a98cef7e | 154 | { |
238e7a11 | 155 | PUSH (SCM_I_MAKINUM (1)); |
a98cef7e KN |
156 | NEXT; |
157 | } | |
158 | ||
46cd9a34 | 159 | VM_DEFINE_INSTRUCTION (make_int16, "make-int16", 2, 0, 1) |
a98cef7e | 160 | { |
ea9b4b29 KN |
161 | int h = FETCH (); |
162 | int l = FETCH (); | |
2d80426a | 163 | PUSH (SCM_I_MAKINUM ((signed short) (h << 8) + l)); |
a98cef7e KN |
164 | NEXT; |
165 | } | |
166 | ||
46cd9a34 | 167 | VM_DEFINE_INSTRUCTION (make_char8, "make-char8", 1, 0, 1) |
a98cef7e | 168 | { |
17e90c5e | 169 | PUSH (SCM_MAKE_CHAR (FETCH ())); |
a98cef7e KN |
170 | NEXT; |
171 | } | |
172 | ||
23b587b0 | 173 | VM_DEFINE_INSTRUCTION (list, "list", 2, -1, 1) |
cb4cca12 | 174 | { |
23b587b0 LC |
175 | unsigned h = FETCH (); |
176 | unsigned l = FETCH (); | |
177 | unsigned len = ((h << 8) + l); | |
178 | POP_LIST (len); | |
cb4cca12 KN |
179 | NEXT; |
180 | } | |
181 | ||
23b587b0 | 182 | VM_DEFINE_INSTRUCTION (vector, "vector", 2, -1, 1) |
cb4cca12 | 183 | { |
23b587b0 LC |
184 | unsigned h = FETCH (); |
185 | unsigned l = FETCH (); | |
186 | unsigned len = ((h << 8) + l); | |
187 | POP_LIST (len); | |
877ffa3f | 188 | SYNC_REGISTER (); |
cb4cca12 KN |
189 | *sp = scm_vector (*sp); |
190 | NEXT; | |
191 | } | |
192 | ||
193 | VM_DEFINE_INSTRUCTION (list_mark, "list-mark", 0, 0, 0) | |
194 | { | |
195 | POP_LIST_MARK (); | |
196 | NEXT; | |
197 | } | |
198 | ||
2bd859c8 AW |
199 | VM_DEFINE_INSTRUCTION (cons_mark, "cons-mark", 0, 0, 0) |
200 | { | |
201 | POP_CONS_MARK (); | |
202 | NEXT; | |
203 | } | |
204 | ||
cb4cca12 KN |
205 | VM_DEFINE_INSTRUCTION (vector_mark, "vector-mark", 0, 0, 0) |
206 | { | |
207 | POP_LIST_MARK (); | |
877ffa3f | 208 | SYNC_REGISTER (); |
cb4cca12 KN |
209 | *sp = scm_vector (*sp); |
210 | NEXT; | |
211 | } | |
212 | ||
213 | VM_DEFINE_INSTRUCTION (list_break, "list-break", 0, 0, 0) | |
214 | { | |
215 | SCM l; | |
216 | POP (l); | |
217 | for (; !SCM_NULLP (l); l = SCM_CDR (l)) | |
218 | PUSH (SCM_CAR (l)); | |
219 | NEXT; | |
220 | } | |
221 | ||
a98cef7e KN |
222 | \f |
223 | /* | |
17e90c5e | 224 | * Variable access |
a98cef7e KN |
225 | */ |
226 | ||
17e90c5e KN |
227 | #define OBJECT_REF(i) objects[i] |
228 | #define OBJECT_SET(i,o) objects[i] = o | |
a98cef7e | 229 | |
af988bbf KN |
230 | #define LOCAL_REF(i) SCM_FRAME_VARIABLE (fp, i) |
231 | #define LOCAL_SET(i,o) SCM_FRAME_VARIABLE (fp, i) = o | |
a98cef7e | 232 | |
2d80426a LC |
233 | /* For the variable operations, we _must_ obviously avoid function calls to |
234 | `scm_variable_ref ()', `scm_variable_bound_p ()' and friends which do | |
235 | nothing more than the corresponding macros. */ | |
236 | #define VARIABLE_REF(v) SCM_VARIABLE_REF (v) | |
237 | #define VARIABLE_SET(v,o) SCM_VARIABLE_SET (v, o) | |
238 | #define VARIABLE_BOUNDP(v) (VARIABLE_REF (v) != SCM_UNDEFINED) | |
a98cef7e | 239 | |
17e90c5e | 240 | /* ref */ |
a98cef7e | 241 | |
46cd9a34 | 242 | VM_DEFINE_INSTRUCTION (object_ref, "object-ref", 1, 0, 1) |
a98cef7e | 243 | { |
a52b2d3d | 244 | register unsigned objnum = FETCH (); |
0b5f0e49 LC |
245 | CHECK_OBJECT (objnum); |
246 | PUSH (OBJECT_REF (objnum)); | |
17e90c5e | 247 | NEXT; |
a98cef7e KN |
248 | } |
249 | ||
46cd9a34 | 250 | VM_DEFINE_INSTRUCTION (local_ref, "local-ref", 1, 0, 1) |
a98cef7e | 251 | { |
17e90c5e KN |
252 | PUSH (LOCAL_REF (FETCH ())); |
253 | NEXT; | |
a98cef7e KN |
254 | } |
255 | ||
46cd9a34 | 256 | VM_DEFINE_INSTRUCTION (external_ref, "external-ref", 1, 0, 1) |
a98cef7e | 257 | { |
17e90c5e KN |
258 | unsigned int i; |
259 | SCM e = external; | |
260 | for (i = FETCH (); i; i--) | |
2a63758b KN |
261 | { |
262 | CHECK_EXTERNAL(e); | |
263 | e = SCM_CDR (e); | |
264 | } | |
265 | CHECK_EXTERNAL(e); | |
17e90c5e | 266 | PUSH (SCM_CAR (e)); |
a98cef7e KN |
267 | NEXT; |
268 | } | |
269 | ||
46cd9a34 | 270 | VM_DEFINE_INSTRUCTION (variable_ref, "variable-ref", 0, 0, 1) |
a98cef7e | 271 | { |
17e90c5e | 272 | SCM x = *sp; |
238e7a11 | 273 | |
2d80426a | 274 | if (!VARIABLE_BOUNDP (x)) |
17e90c5e | 275 | { |
238e7a11 LC |
276 | err_args = SCM_LIST1 (x); |
277 | /* Was: err_args = SCM_LIST1 (SCM_CAR (x)); */ | |
17e90c5e KN |
278 | goto vm_error_unbound; |
279 | } | |
238e7a11 LC |
280 | else |
281 | { | |
2d80426a | 282 | SCM o = VARIABLE_REF (x); |
238e7a11 LC |
283 | *sp = o; |
284 | } | |
285 | ||
a98cef7e KN |
286 | NEXT; |
287 | } | |
288 | ||
9cc649b8 AW |
289 | VM_DEFINE_INSTRUCTION (late_variable_ref, "late-variable-ref", 1, 0, 1) |
290 | { | |
6297d229 | 291 | unsigned objnum = FETCH (); |
fd358575 | 292 | SCM what; |
9cc649b8 | 293 | CHECK_OBJECT (objnum); |
fd358575 | 294 | what = OBJECT_REF (objnum); |
9cc649b8 | 295 | |
fd358575 | 296 | if (!SCM_VARIABLEP (what)) |
9cc649b8 | 297 | { |
d0168f3d | 298 | SYNC_REGISTER (); |
fd358575 | 299 | if (SCM_LIKELY (SCM_SYMBOLP (what))) |
3aabb7b7 | 300 | { |
fd358575 AW |
301 | if (SCM_LIKELY (scm_module_system_booted_p |
302 | && scm_is_true (bp->module))) | |
303 | /* might longjmp */ | |
304 | what = scm_module_lookup (bp->module, what); | |
305 | else | |
306 | what = scm_sym2var (what, SCM_BOOL_F, SCM_BOOL_F); | |
3aabb7b7 AW |
307 | } |
308 | else | |
309 | { | |
fd358575 AW |
310 | SCM mod; |
311 | /* compilation of @ or @@ | |
312 | `what' is a three-element list: (MODNAME SYM INTERFACE?) | |
313 | INTERFACE? is #t if we compiled @ or #f if we compiled @@ | |
314 | */ | |
315 | mod = scm_resolve_module (SCM_CAR (what)); | |
316 | if (scm_is_true (SCM_CADDR (what))) | |
317 | mod = scm_module_public_interface (mod); | |
318 | if (SCM_FALSEP (mod)) | |
319 | { | |
320 | err_args = SCM_LIST1 (mod); | |
321 | goto vm_error_no_such_module; | |
322 | } | |
323 | /* might longjmp */ | |
324 | what = scm_module_lookup (mod, SCM_CADR (what)); | |
3aabb7b7 AW |
325 | } |
326 | ||
fd358575 | 327 | if (!VARIABLE_BOUNDP (what)) |
9cc649b8 | 328 | { |
fd358575 | 329 | err_args = SCM_LIST1 (what); |
9cc649b8 AW |
330 | goto vm_error_unbound; |
331 | } | |
3aabb7b7 | 332 | |
fd358575 | 333 | OBJECT_SET (objnum, what); |
9cc649b8 AW |
334 | } |
335 | ||
fd358575 | 336 | PUSH (VARIABLE_REF (what)); |
9cc649b8 AW |
337 | NEXT; |
338 | } | |
339 | ||
17e90c5e KN |
340 | /* set */ |
341 | ||
46cd9a34 | 342 | VM_DEFINE_INSTRUCTION (local_set, "local-set", 1, 1, 0) |
a98cef7e | 343 | { |
17e90c5e KN |
344 | LOCAL_SET (FETCH (), *sp); |
345 | DROP (); | |
a98cef7e KN |
346 | NEXT; |
347 | } | |
348 | ||
46cd9a34 | 349 | VM_DEFINE_INSTRUCTION (external_set, "external-set", 1, 1, 0) |
a98cef7e | 350 | { |
17e90c5e KN |
351 | unsigned int i; |
352 | SCM e = external; | |
353 | for (i = FETCH (); i; i--) | |
ac02b386 KN |
354 | { |
355 | CHECK_EXTERNAL(e); | |
356 | e = SCM_CDR (e); | |
357 | } | |
358 | CHECK_EXTERNAL(e); | |
17e90c5e KN |
359 | SCM_SETCAR (e, *sp); |
360 | DROP (); | |
a98cef7e KN |
361 | NEXT; |
362 | } | |
363 | ||
46cd9a34 | 364 | VM_DEFINE_INSTRUCTION (variable_set, "variable-set", 0, 1, 0) |
a98cef7e | 365 | { |
2d80426a | 366 | VARIABLE_SET (sp[0], sp[-1]); |
11ea1aba | 367 | DROPN (2); |
a98cef7e KN |
368 | NEXT; |
369 | } | |
370 | ||
9cc649b8 AW |
371 | VM_DEFINE_INSTRUCTION (late_variable_set, "late-variable-set", 1, 1, 0) |
372 | { | |
6297d229 | 373 | unsigned objnum = FETCH (); |
fd358575 | 374 | SCM what; |
9cc649b8 | 375 | CHECK_OBJECT (objnum); |
fd358575 | 376 | what = OBJECT_REF (objnum); |
9cc649b8 | 377 | |
fd358575 | 378 | if (!SCM_VARIABLEP (what)) |
9cc649b8 | 379 | { |
6287726a | 380 | SYNC_BEFORE_GC (); |
fd358575 | 381 | if (SCM_LIKELY (SCM_SYMBOLP (what))) |
3aabb7b7 | 382 | { |
fd358575 AW |
383 | if (SCM_LIKELY (scm_module_system_booted_p |
384 | && scm_is_true (bp->module))) | |
385 | /* might longjmp */ | |
386 | what = scm_module_lookup (bp->module, what); | |
387 | else | |
388 | what = scm_sym2var (what, SCM_BOOL_F, SCM_BOOL_F); | |
3aabb7b7 AW |
389 | } |
390 | else | |
391 | { | |
fd358575 AW |
392 | SCM mod; |
393 | /* compilation of @ or @@ | |
394 | `what' is a three-element list: (MODNAME SYM INTERFACE?) | |
395 | INTERFACE? is #t if we compiled @ or #f if we compiled @@ | |
396 | */ | |
397 | mod = scm_resolve_module (SCM_CAR (what)); | |
398 | if (scm_is_true (SCM_CADDR (what))) | |
399 | mod = scm_module_public_interface (mod); | |
400 | if (SCM_FALSEP (mod)) | |
401 | { | |
402 | err_args = SCM_LIST1 (what); | |
403 | goto vm_error_no_such_module; | |
404 | } | |
405 | /* might longjmp */ | |
406 | what = scm_module_lookup (mod, SCM_CADR (what)); | |
3aabb7b7 AW |
407 | } |
408 | ||
fd358575 | 409 | OBJECT_SET (objnum, what); |
9cc649b8 AW |
410 | } |
411 | ||
fd358575 | 412 | VARIABLE_SET (what, *sp); |
9cc649b8 AW |
413 | DROP (); |
414 | NEXT; | |
415 | } | |
416 | ||
a98cef7e KN |
417 | \f |
418 | /* | |
419 | * branch and jump | |
420 | */ | |
421 | ||
efbd5892 AW |
422 | /* offset must be a signed short!!! */ |
423 | #define FETCH_OFFSET(offset) \ | |
17e90c5e | 424 | { \ |
41f248a8 KN |
425 | int h = FETCH (); \ |
426 | int l = FETCH (); \ | |
efbd5892 AW |
427 | offset = (h << 8) + l; \ |
428 | } | |
429 | ||
430 | #define BR(p) \ | |
431 | { \ | |
432 | signed short offset; \ | |
433 | FETCH_OFFSET (offset); \ | |
17e90c5e KN |
434 | if (p) \ |
435 | ip += offset; \ | |
11ea1aba | 436 | NULLSTACK (1); \ |
17e90c5e KN |
437 | DROP (); \ |
438 | NEXT; \ | |
439 | } | |
440 | ||
41f248a8 KN |
441 | VM_DEFINE_INSTRUCTION (br, "br", 2, 0, 0) |
442 | { | |
443 | int h = FETCH (); | |
444 | int l = FETCH (); | |
445 | ip += (signed short) (h << 8) + l; | |
446 | NEXT; | |
447 | } | |
448 | ||
449 | VM_DEFINE_INSTRUCTION (br_if, "br-if", 2, 0, 0) | |
a98cef7e | 450 | { |
17e90c5e | 451 | BR (!SCM_FALSEP (*sp)); |
a98cef7e KN |
452 | } |
453 | ||
41f248a8 | 454 | VM_DEFINE_INSTRUCTION (br_if_not, "br-if-not", 2, 0, 0) |
a98cef7e | 455 | { |
17e90c5e | 456 | BR (SCM_FALSEP (*sp)); |
a98cef7e KN |
457 | } |
458 | ||
41f248a8 | 459 | VM_DEFINE_INSTRUCTION (br_if_eq, "br-if-eq", 2, 0, 0) |
a98cef7e | 460 | { |
17e90c5e | 461 | BR (SCM_EQ_P (sp[0], sp--[1])); |
a98cef7e KN |
462 | } |
463 | ||
41f248a8 | 464 | VM_DEFINE_INSTRUCTION (br_if_not_eq, "br-if-not-eq", 2, 0, 0) |
a98cef7e | 465 | { |
17e90c5e KN |
466 | BR (!SCM_EQ_P (sp[0], sp--[1])); |
467 | } | |
468 | ||
41f248a8 | 469 | VM_DEFINE_INSTRUCTION (br_if_null, "br-if-null", 2, 0, 0) |
17e90c5e KN |
470 | { |
471 | BR (SCM_NULLP (*sp)); | |
472 | } | |
473 | ||
41f248a8 | 474 | VM_DEFINE_INSTRUCTION (br_if_not_null, "br-if-not-null", 2, 0, 0) |
17e90c5e KN |
475 | { |
476 | BR (!SCM_NULLP (*sp)); | |
a98cef7e KN |
477 | } |
478 | ||
a98cef7e KN |
479 | \f |
480 | /* | |
481 | * Subprogram call | |
482 | */ | |
483 | ||
46cd9a34 | 484 | VM_DEFINE_INSTRUCTION (make_closure, "make-closure", 0, 1, 1) |
a98cef7e | 485 | { |
3d5ee0cd KN |
486 | SYNC_BEFORE_GC (); |
487 | *sp = scm_c_make_closure (*sp, external); | |
17e90c5e | 488 | NEXT; |
a98cef7e KN |
489 | } |
490 | ||
46cd9a34 | 491 | VM_DEFINE_INSTRUCTION (call, "call", 1, -1, 1) |
a98cef7e | 492 | { |
3616e9e9 | 493 | SCM x; |
17e90c5e | 494 | nargs = FETCH (); |
a98cef7e KN |
495 | |
496 | vm_call: | |
c8b9df71 KN |
497 | x = sp[-nargs]; |
498 | ||
a98cef7e KN |
499 | /* |
500 | * Subprogram call | |
501 | */ | |
3616e9e9 | 502 | if (SCM_PROGRAM_P (x)) |
a98cef7e | 503 | { |
3616e9e9 | 504 | program = x; |
499a4c07 | 505 | CACHE_PROGRAM (); |
17e90c5e KN |
506 | INIT_ARGS (); |
507 | NEW_FRAME (); | |
17e90c5e KN |
508 | ENTER_HOOK (); |
509 | APPLY_HOOK (); | |
a98cef7e KN |
510 | NEXT; |
511 | } | |
d507b25f AW |
512 | #ifdef ENABLE_TRAMPOLINE |
513 | /* Seems to slow down the fibo test, dunno why */ | |
a98cef7e | 514 | /* |
659b4611 AW |
515 | * Subr call |
516 | */ | |
517 | switch (nargs) | |
518 | { | |
519 | case 0: | |
520 | { | |
521 | scm_t_trampoline_0 call = scm_trampoline_0 (x); | |
522 | if (call) | |
523 | { | |
524 | SYNC_ALL (); | |
525 | *sp = call (x); | |
526 | NEXT; | |
527 | } | |
528 | break; | |
529 | } | |
530 | case 1: | |
531 | { | |
532 | scm_t_trampoline_1 call = scm_trampoline_1 (x); | |
533 | if (call) | |
534 | { | |
535 | SCM arg1; | |
536 | POP (arg1); | |
537 | SYNC_ALL (); | |
538 | *sp = call (x, arg1); | |
539 | NEXT; | |
540 | } | |
541 | break; | |
542 | } | |
543 | case 2: | |
544 | { | |
545 | scm_t_trampoline_2 call = scm_trampoline_2 (x); | |
546 | if (call) | |
547 | { | |
548 | SCM arg1, arg2; | |
549 | POP (arg2); | |
550 | POP (arg1); | |
551 | SYNC_ALL (); | |
552 | *sp = call (x, arg1, arg2); | |
553 | NEXT; | |
554 | } | |
555 | break; | |
556 | } | |
557 | } | |
d507b25f | 558 | #endif |
659b4611 AW |
559 | /* |
560 | * Other interpreted or compiled call | |
a98cef7e | 561 | */ |
3616e9e9 | 562 | if (!SCM_FALSEP (scm_procedure_p (x))) |
a98cef7e | 563 | { |
f41cb00c LC |
564 | /* At this point, the stack contains the procedure and each one of its |
565 | arguments. */ | |
17e90c5e | 566 | POP_LIST (nargs); |
1865ad56 | 567 | SYNC_REGISTER (); |
887ce75a AW |
568 | /* keep args on stack so they are marked */ |
569 | sp[-1] = scm_apply (x, sp[0], SCM_EOL); | |
76282387 | 570 | /* FIXME what if SCM_VALUESP(*sp) */ |
887ce75a | 571 | DROP (); |
17e90c5e | 572 | NEXT; |
a98cef7e KN |
573 | } |
574 | /* | |
575 | * Continuation call | |
576 | */ | |
3616e9e9 | 577 | if (SCM_VM_CONT_P (x)) |
a98cef7e | 578 | { |
fcd4901b | 579 | program = x; |
f03c31db | 580 | vm_call_continuation: |
a98cef7e | 581 | /* Check the number of arguments */ |
f03c31db | 582 | /* FIXME multiple args */ |
382693fe | 583 | if (nargs != 1) |
fcd4901b | 584 | scm_wrong_num_args (program); |
a98cef7e KN |
585 | |
586 | /* Reinstate the continuation */ | |
17e90c5e | 587 | EXIT_HOOK (); |
fcd4901b | 588 | reinstate_vm_cont (vp, program); |
3d5ee0cd | 589 | CACHE_REGISTER (); |
af988bbf | 590 | program = SCM_FRAME_PROGRAM (fp); |
3616e9e9 | 591 | CACHE_PROGRAM (); |
a98cef7e KN |
592 | NEXT; |
593 | } | |
594 | ||
66292535 | 595 | program = x; |
17e90c5e | 596 | goto vm_error_wrong_type_apply; |
a98cef7e KN |
597 | } |
598 | ||
f03c31db | 599 | VM_DEFINE_INSTRUCTION (goto_args, "goto/args", 1, -1, 1) |
a98cef7e | 600 | { |
f41cb00c | 601 | register SCM x; |
17e90c5e | 602 | nargs = FETCH (); |
f03c31db | 603 | vm_goto_args: |
3616e9e9 | 604 | x = sp[-nargs]; |
17e90c5e KN |
605 | |
606 | SCM_TICK; /* allow interrupt here */ | |
a98cef7e KN |
607 | |
608 | /* | |
17e90c5e | 609 | * Tail recursive call |
a98cef7e | 610 | */ |
17e90c5e | 611 | if (SCM_EQ_P (x, program)) |
a98cef7e | 612 | { |
f21dfea6 | 613 | int i; |
17e90c5e KN |
614 | |
615 | /* Move arguments */ | |
f21dfea6 KN |
616 | INIT_ARGS (); |
617 | sp -= bp->nargs - 1; | |
618 | for (i = 0; i < bp->nargs; i++) | |
619 | LOCAL_SET (i, sp[i]); | |
f41cb00c LC |
620 | |
621 | /* Drop the first argument and the program itself. */ | |
622 | sp -= 2; | |
11ea1aba | 623 | NULLSTACK (bp->nargs + 1) |
a98cef7e | 624 | |
f21dfea6 | 625 | /* Call itself */ |
17e90c5e | 626 | ip = bp->base; |
17e90c5e | 627 | APPLY_HOOK (); |
a98cef7e KN |
628 | NEXT; |
629 | } | |
28106f54 | 630 | |
17e90c5e | 631 | /* |
28106f54 | 632 | * Tail call, but not to self -- reuse the frame, keeping the ra and dl |
17e90c5e | 633 | */ |
3616e9e9 | 634 | if (SCM_PROGRAM_P (x)) |
17e90c5e | 635 | { |
28106f54 AW |
636 | SCM *data, *tail_args, *dl; |
637 | int i; | |
da320011 | 638 | scm_byte_t *ra, *mvra; |
11ea1aba AW |
639 | #ifdef VM_ENABLE_STACK_NULLING |
640 | SCM *old_sp; | |
641 | #endif | |
28106f54 | 642 | |
17e90c5e | 643 | EXIT_HOOK (); |
28106f54 AW |
644 | |
645 | /* save registers */ | |
646 | tail_args = stack_base + 2; | |
647 | ra = SCM_FRAME_RETURN_ADDRESS (fp); | |
da320011 | 648 | mvra = SCM_FRAME_MV_RETURN_ADDRESS (fp); |
28106f54 AW |
649 | dl = SCM_FRAME_DYNAMIC_LINK (fp); |
650 | ||
651 | /* switch programs */ | |
11ea1aba | 652 | program = x; |
28106f54 AW |
653 | CACHE_PROGRAM (); |
654 | INIT_ARGS (); | |
11ea1aba AW |
655 | /* delay updating the frame so that if INIT_ARGS has to cons up a rest |
656 | arg, going into GC, the stack still makes sense */ | |
657 | fp[-1] = program; | |
28106f54 AW |
658 | nargs = bp->nargs; |
659 | ||
11ea1aba AW |
660 | #ifdef VM_ENABLE_STACK_NULLING |
661 | old_sp = sp; | |
662 | CHECK_STACK_LEAK (); | |
663 | #endif | |
664 | ||
28106f54 AW |
665 | /* new registers -- logically this would be better later, but let's make |
666 | sure we have space for the locals now */ | |
667 | data = SCM_FRAME_DATA_ADDRESS (fp); | |
668 | ip = bp->base; | |
da320011 | 669 | stack_base = data + 4; |
28106f54 AW |
670 | sp = stack_base; |
671 | CHECK_OVERFLOW (); | |
672 | ||
673 | /* copy args, bottom-up */ | |
674 | for (i = 0; i < nargs; i++) | |
675 | fp[i] = tail_args[i]; | |
676 | ||
11ea1aba AW |
677 | NULLSTACK (old_sp - sp); |
678 | ||
28106f54 AW |
679 | /* init locals */ |
680 | for (i = bp->nlocs; i; i--) | |
681 | data[-i] = SCM_UNDEFINED; | |
682 | ||
28106f54 | 683 | /* Set frame data */ |
da320011 AW |
684 | data[4] = (SCM)ra; |
685 | data[3] = (SCM)mvra; | |
28106f54 AW |
686 | data[2] = (SCM)dl; |
687 | data[1] = SCM_BOOL_F; | |
11ea1aba AW |
688 | |
689 | /* Postpone initializing external vars, because if the CONS causes a GC, | |
690 | we want the stack marker to see the data array formatted as expected. */ | |
691 | data[0] = SCM_UNDEFINED; | |
692 | external = bp->external; | |
693 | for (i = 0; i < bp->nexts; i++) | |
694 | CONS (external, SCM_UNDEFINED, external); | |
28106f54 | 695 | data[0] = external; |
11ea1aba | 696 | |
28106f54 AW |
697 | ENTER_HOOK (); |
698 | APPLY_HOOK (); | |
699 | NEXT; | |
17e90c5e | 700 | } |
d507b25f AW |
701 | #ifdef ENABLE_TRAMPOLINE |
702 | /* This seems to actually slow down the fibo test -- dunno why */ | |
a98cef7e | 703 | /* |
659b4611 AW |
704 | * Subr call |
705 | */ | |
706 | switch (nargs) | |
707 | { | |
708 | case 0: | |
709 | { | |
710 | scm_t_trampoline_0 call = scm_trampoline_0 (x); | |
711 | if (call) | |
712 | { | |
713 | SYNC_ALL (); | |
714 | *sp = call (x); | |
715 | goto vm_return; | |
716 | } | |
717 | break; | |
718 | } | |
719 | case 1: | |
720 | { | |
721 | scm_t_trampoline_1 call = scm_trampoline_1 (x); | |
722 | if (call) | |
723 | { | |
724 | SCM arg1; | |
725 | POP (arg1); | |
726 | SYNC_ALL (); | |
727 | *sp = call (x, arg1); | |
728 | goto vm_return; | |
729 | } | |
730 | break; | |
731 | } | |
732 | case 2: | |
733 | { | |
734 | scm_t_trampoline_2 call = scm_trampoline_2 (x); | |
735 | if (call) | |
736 | { | |
737 | SCM arg1, arg2; | |
738 | POP (arg2); | |
739 | POP (arg1); | |
740 | SYNC_ALL (); | |
741 | *sp = call (x, arg1, arg2); | |
742 | goto vm_return; | |
743 | } | |
744 | break; | |
745 | } | |
746 | } | |
d507b25f | 747 | #endif |
659b4611 AW |
748 | |
749 | /* | |
750 | * Other interpreted or compiled call | |
a98cef7e | 751 | */ |
3616e9e9 | 752 | if (!SCM_FALSEP (scm_procedure_p (x))) |
a98cef7e | 753 | { |
17e90c5e | 754 | POP_LIST (nargs); |
1865ad56 | 755 | SYNC_REGISTER (); |
887ce75a AW |
756 | sp[-1] = scm_apply (x, sp[0], SCM_EOL); |
757 | DROP (); | |
76282387 | 758 | /* FIXME what if SCM_VALUESP(*sp) */ |
a98cef7e KN |
759 | goto vm_return; |
760 | } | |
fcd4901b AW |
761 | |
762 | program = x; | |
763 | ||
a98cef7e KN |
764 | /* |
765 | * Continuation call | |
766 | */ | |
fcd4901b | 767 | if (SCM_VM_CONT_P (program)) |
f03c31db | 768 | goto vm_call_continuation; |
a98cef7e | 769 | |
17e90c5e KN |
770 | goto vm_error_wrong_type_apply; |
771 | } | |
772 | ||
efbd5892 AW |
773 | VM_DEFINE_INSTRUCTION (goto_nargs, "goto/nargs", 0, 0, 1) |
774 | { | |
775 | SCM x; | |
776 | POP (x); | |
777 | nargs = scm_to_int (x); | |
d51406fe | 778 | /* FIXME: should truncate values? */ |
efbd5892 AW |
779 | goto vm_goto_args; |
780 | } | |
781 | ||
782 | VM_DEFINE_INSTRUCTION (call_nargs, "call/nargs", 0, 0, 1) | |
783 | { | |
784 | SCM x; | |
785 | POP (x); | |
786 | nargs = scm_to_int (x); | |
d51406fe | 787 | /* FIXME: should truncate values? */ |
efbd5892 AW |
788 | goto vm_call; |
789 | } | |
790 | ||
791 | VM_DEFINE_INSTRUCTION (mv_call, "mv-call", 3, -1, 1) | |
a222b0fa AW |
792 | { |
793 | SCM x; | |
efbd5892 | 794 | signed short offset; |
a222b0fa AW |
795 | |
796 | nargs = FETCH (); | |
efbd5892 | 797 | FETCH_OFFSET (offset); |
a222b0fa AW |
798 | |
799 | x = sp[-nargs]; | |
800 | ||
801 | /* | |
802 | * Subprogram call | |
803 | */ | |
804 | if (SCM_PROGRAM_P (x)) | |
805 | { | |
806 | program = x; | |
807 | CACHE_PROGRAM (); | |
808 | INIT_ARGS (); | |
809 | NEW_FRAME (); | |
810 | SCM_FRAME_DATA_ADDRESS (fp)[3] = (SCM)(SCM_FRAME_RETURN_ADDRESS (fp) + offset); | |
811 | ENTER_HOOK (); | |
812 | APPLY_HOOK (); | |
813 | NEXT; | |
814 | } | |
815 | /* | |
816 | * Other interpreted or compiled call | |
817 | */ | |
818 | if (!SCM_FALSEP (scm_procedure_p (x))) | |
819 | { | |
820 | /* At this point, the stack contains the procedure and each one of its | |
821 | arguments. */ | |
a222b0fa | 822 | POP_LIST (nargs); |
a222b0fa | 823 | SYNC_REGISTER (); |
887ce75a AW |
824 | sp[-1] = scm_apply (x, sp[0], SCM_EOL); |
825 | DROP (); | |
a222b0fa AW |
826 | if (SCM_VALUESP (*sp)) |
827 | { | |
828 | SCM values, len; | |
829 | POP (values); | |
830 | values = scm_struct_ref (values, SCM_INUM0); | |
831 | len = scm_length (values); | |
cd829416 | 832 | for (; !SCM_NULLP (values); values = SCM_CDR (values)) |
a222b0fa AW |
833 | PUSH (SCM_CAR (values)); |
834 | PUSH (len); | |
835 | ip += offset; | |
836 | } | |
837 | NEXT; | |
838 | } | |
839 | /* | |
840 | * Continuation call | |
841 | */ | |
842 | if (SCM_VM_CONT_P (x)) | |
843 | { | |
844 | program = x; | |
845 | goto vm_call_continuation; | |
846 | } | |
847 | ||
848 | program = x; | |
849 | goto vm_error_wrong_type_apply; | |
850 | } | |
851 | ||
3616e9e9 KN |
852 | VM_DEFINE_INSTRUCTION (apply, "apply", 1, -1, 1) |
853 | { | |
c8b9df71 KN |
854 | int len; |
855 | SCM ls; | |
856 | POP (ls); | |
857 | ||
858 | nargs = FETCH (); | |
9a8cc8e7 | 859 | ASSERT (nargs >= 2); |
c8b9df71 KN |
860 | |
861 | len = scm_ilength (ls); | |
862 | if (len < 0) | |
863 | goto vm_error_wrong_type_arg; | |
864 | ||
865 | for (; !SCM_NULLP (ls); ls = SCM_CDR (ls)) | |
866 | PUSH (SCM_CAR (ls)); | |
867 | ||
868 | nargs += len - 2; | |
869 | goto vm_call; | |
3616e9e9 KN |
870 | } |
871 | ||
f03c31db AW |
872 | VM_DEFINE_INSTRUCTION (goto_apply, "goto/apply", 1, -1, 1) |
873 | { | |
874 | int len; | |
875 | SCM ls; | |
876 | POP (ls); | |
877 | ||
878 | nargs = FETCH (); | |
9a8cc8e7 | 879 | ASSERT (nargs >= 2); |
f03c31db AW |
880 | |
881 | len = scm_ilength (ls); | |
882 | if (len < 0) | |
883 | goto vm_error_wrong_type_arg; | |
884 | ||
885 | for (; !SCM_NULLP (ls); ls = SCM_CDR (ls)) | |
886 | PUSH (SCM_CAR (ls)); | |
887 | ||
888 | nargs += len - 2; | |
889 | goto vm_goto_args; | |
890 | } | |
891 | ||
76282387 | 892 | VM_DEFINE_INSTRUCTION (call_cc, "call/cc", 0, 1, 1) |
17e90c5e | 893 | { |
76282387 AW |
894 | int first; |
895 | SCM proc, cont; | |
896 | POP (proc); | |
897 | SYNC_ALL (); | |
898 | cont = scm_make_continuation (&first); | |
899 | if (first) | |
900 | { | |
901 | PUSH (proc); | |
902 | PUSH (cont); | |
903 | nargs = 1; | |
904 | goto vm_call; | |
905 | } | |
11ea1aba AW |
906 | ASSERT (sp == vp->sp); |
907 | ASSERT (fp == vp->fp); | |
908 | ASSERT (ip == vp->ip); | |
76282387 AW |
909 | else if (SCM_VALUESP (cont)) |
910 | { | |
911 | /* multiple values returned to continuation */ | |
912 | SCM values; | |
913 | values = scm_struct_ref (cont, SCM_INUM0); | |
914 | if (SCM_NULLP (values)) | |
9a8cc8e7 | 915 | goto vm_error_no_values; |
76282387 AW |
916 | /* non-tail context does not accept multiple values? */ |
917 | PUSH (SCM_CAR (values)); | |
918 | NEXT; | |
919 | } | |
920 | else | |
921 | { | |
922 | PUSH (cont); | |
923 | NEXT; | |
924 | } | |
a98cef7e KN |
925 | } |
926 | ||
76282387 | 927 | VM_DEFINE_INSTRUCTION (goto_cc, "goto/cc", 0, 1, 1) |
f03c31db | 928 | { |
76282387 AW |
929 | int first; |
930 | SCM proc, cont; | |
931 | POP (proc); | |
932 | SYNC_ALL (); | |
933 | cont = scm_make_continuation (&first); | |
934 | if (first) | |
935 | { | |
936 | PUSH (proc); | |
937 | PUSH (cont); | |
938 | nargs = 1; | |
939 | goto vm_goto_args; | |
940 | } | |
941 | else if (SCM_VALUESP (cont)) | |
942 | { | |
943 | /* multiple values returned to continuation */ | |
944 | SCM values; | |
945 | values = scm_struct_ref (cont, SCM_INUM0); | |
946 | nvalues = scm_ilength (values); | |
cd829416 | 947 | for (; !SCM_NULLP (values); values = SCM_CDR (values)) |
76282387 AW |
948 | PUSH (SCM_CAR (values)); |
949 | goto vm_return_values; | |
950 | } | |
951 | else | |
952 | { | |
953 | PUSH (cont); | |
954 | goto vm_return; | |
955 | } | |
f03c31db AW |
956 | } |
957 | ||
46cd9a34 | 958 | VM_DEFINE_INSTRUCTION (return, "return", 0, 0, 1) |
a98cef7e | 959 | { |
a98cef7e | 960 | vm_return: |
17e90c5e KN |
961 | EXIT_HOOK (); |
962 | RETURN_HOOK (); | |
f13c269b AW |
963 | { |
964 | SCM ret, *data; | |
965 | data = SCM_FRAME_DATA_ADDRESS (fp); | |
966 | ||
967 | POP (ret); | |
11ea1aba AW |
968 | ASSERT (sp == stack_base); |
969 | ASSERT (stack_base == data + 4); | |
f13c269b AW |
970 | |
971 | /* Restore registers */ | |
972 | sp = SCM_FRAME_LOWER_ADDRESS (fp); | |
da320011 | 973 | ip = SCM_FRAME_BYTE_CAST (data[4]); |
f13c269b | 974 | fp = SCM_FRAME_STACK_CAST (data[2]); |
11ea1aba AW |
975 | { |
976 | #ifdef VM_ENABLE_STACK_NULLING | |
977 | int nullcount = stack_base - sp; | |
978 | #endif | |
979 | stack_base = SCM_FRAME_UPPER_ADDRESS (fp) - 1; | |
980 | NULLSTACK (nullcount); | |
981 | } | |
f13c269b AW |
982 | |
983 | /* Set return value (sp is already pushed) */ | |
984 | *sp = ret; | |
985 | } | |
17e90c5e | 986 | |
15df3447 | 987 | /* Restore the last program */ |
af988bbf | 988 | program = SCM_FRAME_PROGRAM (fp); |
499a4c07 | 989 | CACHE_PROGRAM (); |
af988bbf | 990 | CACHE_EXTERNAL (); |
7e4760e4 | 991 | CHECK_IP (); |
a98cef7e KN |
992 | NEXT; |
993 | } | |
17e90c5e | 994 | |
a222b0fa AW |
995 | VM_DEFINE_INSTRUCTION (return_values, "return/values", 1, -1, -1) |
996 | { | |
ef24c01b AW |
997 | /* nvalues declared at top level, because for some reason gcc seems to think |
998 | that perhaps it might be used without declaration. Fooey to that, I say. */ | |
999 | SCM *data; | |
1000 | ||
1001 | nvalues = FETCH (); | |
1002 | vm_return_values: | |
a222b0fa AW |
1003 | EXIT_HOOK (); |
1004 | RETURN_HOOK (); | |
ef24c01b AW |
1005 | |
1006 | data = SCM_FRAME_DATA_ADDRESS (fp); | |
11ea1aba | 1007 | ASSERT (stack_base == data + 4); |
a222b0fa | 1008 | |
ef24c01b AW |
1009 | /* data[3] is the mv return address */ |
1010 | if (nvalues != 1 && data[3]) | |
1011 | { | |
1012 | int i; | |
1013 | /* Restore registers */ | |
1014 | sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1; | |
1015 | ip = SCM_FRAME_BYTE_CAST (data[3]); /* multiple value ra */ | |
1016 | fp = SCM_FRAME_STACK_CAST (data[2]); | |
a222b0fa | 1017 | |
ef24c01b AW |
1018 | /* Push return values, and the number of values */ |
1019 | for (i = 0; i < nvalues; i++) | |
1020 | *++sp = stack_base[1+i]; | |
1021 | *++sp = SCM_I_MAKINUM (nvalues); | |
a222b0fa | 1022 | |
ef24c01b | 1023 | /* Finally set new stack_base */ |
11ea1aba | 1024 | NULLSTACK (stack_base - sp + nvalues + 1); |
ef24c01b AW |
1025 | stack_base = SCM_FRAME_UPPER_ADDRESS (fp) - 1; |
1026 | } | |
1027 | else if (nvalues >= 1) | |
1028 | { | |
1029 | /* Multiple values for a single-valued continuation -- here's where I | |
1030 | break with guile tradition and try and do something sensible. (Also, | |
1031 | this block handles the single-valued return to an mv | |
1032 | continuation.) */ | |
1033 | /* Restore registers */ | |
1034 | sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1; | |
1035 | ip = SCM_FRAME_BYTE_CAST (data[4]); /* single value ra */ | |
1036 | fp = SCM_FRAME_STACK_CAST (data[2]); | |
a222b0fa | 1037 | |
ef24c01b AW |
1038 | /* Push first value */ |
1039 | *++sp = stack_base[1]; | |
a222b0fa | 1040 | |
ef24c01b | 1041 | /* Finally set new stack_base */ |
11ea1aba | 1042 | NULLSTACK (stack_base - sp); |
ef24c01b AW |
1043 | stack_base = SCM_FRAME_UPPER_ADDRESS (fp) - 1; |
1044 | } | |
1045 | else | |
1046 | goto vm_error_no_values; | |
a222b0fa AW |
1047 | |
1048 | /* Restore the last program */ | |
1049 | program = SCM_FRAME_PROGRAM (fp); | |
1050 | CACHE_PROGRAM (); | |
1051 | CACHE_EXTERNAL (); | |
1052 | CHECK_IP (); | |
1053 | NEXT; | |
1054 | } | |
1055 | ||
ef24c01b AW |
1056 | VM_DEFINE_INSTRUCTION (return_values_star, "return/values*", 1, -1, -1) |
1057 | { | |
1058 | SCM l; | |
1059 | ||
1060 | nvalues = FETCH (); | |
11ea1aba | 1061 | ASSERT (nvalues >= 1); |
ef24c01b AW |
1062 | |
1063 | nvalues--; | |
1064 | POP (l); | |
1065 | while (SCM_CONSP (l)) | |
1066 | { | |
1067 | PUSH (SCM_CAR (l)); | |
1068 | l = SCM_CDR (l); | |
1069 | nvalues++; | |
1070 | } | |
1071 | ||
1072 | goto vm_return_values; | |
1073 | } | |
1074 | ||
d51406fe AW |
1075 | VM_DEFINE_INSTRUCTION (truncate_values, "truncate-values", 2, -1, -1) |
1076 | { | |
1077 | SCM x; | |
1078 | int nbinds, rest; | |
1079 | POP (x); | |
1080 | nvalues = scm_to_int (x); | |
1081 | nbinds = FETCH (); | |
1082 | rest = FETCH (); | |
1083 | ||
1084 | if (rest) | |
1085 | nbinds--; | |
1086 | ||
1087 | if (nvalues < nbinds) | |
1088 | goto vm_error_not_enough_values; | |
1089 | ||
1090 | if (rest) | |
1091 | POP_LIST (nvalues - nbinds); | |
1092 | else | |
1093 | DROPN (nvalues - nbinds); | |
1094 | ||
1095 | NEXT; | |
1096 | } | |
1097 | ||
17e90c5e KN |
1098 | /* |
1099 | Local Variables: | |
1100 | c-file-style: "gnu" | |
1101 | End: | |
1102 | */ |