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); | |
1f40459f | 217 | PUSH_LIST (l); |
cb4cca12 KN |
218 | NEXT; |
219 | } | |
220 | ||
a98cef7e KN |
221 | \f |
222 | /* | |
17e90c5e | 223 | * Variable access |
a98cef7e KN |
224 | */ |
225 | ||
17e90c5e KN |
226 | #define OBJECT_REF(i) objects[i] |
227 | #define OBJECT_SET(i,o) objects[i] = o | |
a98cef7e | 228 | |
af988bbf KN |
229 | #define LOCAL_REF(i) SCM_FRAME_VARIABLE (fp, i) |
230 | #define LOCAL_SET(i,o) SCM_FRAME_VARIABLE (fp, i) = o | |
a98cef7e | 231 | |
2d80426a LC |
232 | /* For the variable operations, we _must_ obviously avoid function calls to |
233 | `scm_variable_ref ()', `scm_variable_bound_p ()' and friends which do | |
234 | nothing more than the corresponding macros. */ | |
235 | #define VARIABLE_REF(v) SCM_VARIABLE_REF (v) | |
236 | #define VARIABLE_SET(v,o) SCM_VARIABLE_SET (v, o) | |
237 | #define VARIABLE_BOUNDP(v) (VARIABLE_REF (v) != SCM_UNDEFINED) | |
a98cef7e | 238 | |
17e90c5e | 239 | /* ref */ |
a98cef7e | 240 | |
46cd9a34 | 241 | VM_DEFINE_INSTRUCTION (object_ref, "object-ref", 1, 0, 1) |
a98cef7e | 242 | { |
a52b2d3d | 243 | register unsigned objnum = FETCH (); |
0b5f0e49 LC |
244 | CHECK_OBJECT (objnum); |
245 | PUSH (OBJECT_REF (objnum)); | |
17e90c5e | 246 | NEXT; |
a98cef7e KN |
247 | } |
248 | ||
46cd9a34 | 249 | VM_DEFINE_INSTRUCTION (local_ref, "local-ref", 1, 0, 1) |
a98cef7e | 250 | { |
17e90c5e KN |
251 | PUSH (LOCAL_REF (FETCH ())); |
252 | NEXT; | |
a98cef7e KN |
253 | } |
254 | ||
46cd9a34 | 255 | VM_DEFINE_INSTRUCTION (external_ref, "external-ref", 1, 0, 1) |
a98cef7e | 256 | { |
17e90c5e KN |
257 | unsigned int i; |
258 | SCM e = external; | |
259 | for (i = FETCH (); i; i--) | |
2a63758b KN |
260 | { |
261 | CHECK_EXTERNAL(e); | |
262 | e = SCM_CDR (e); | |
263 | } | |
264 | CHECK_EXTERNAL(e); | |
17e90c5e | 265 | PUSH (SCM_CAR (e)); |
a98cef7e KN |
266 | NEXT; |
267 | } | |
268 | ||
46cd9a34 | 269 | VM_DEFINE_INSTRUCTION (variable_ref, "variable-ref", 0, 0, 1) |
a98cef7e | 270 | { |
17e90c5e | 271 | SCM x = *sp; |
238e7a11 | 272 | |
2d80426a | 273 | if (!VARIABLE_BOUNDP (x)) |
17e90c5e | 274 | { |
238e7a11 LC |
275 | err_args = SCM_LIST1 (x); |
276 | /* Was: err_args = SCM_LIST1 (SCM_CAR (x)); */ | |
17e90c5e KN |
277 | goto vm_error_unbound; |
278 | } | |
238e7a11 LC |
279 | else |
280 | { | |
2d80426a | 281 | SCM o = VARIABLE_REF (x); |
238e7a11 LC |
282 | *sp = o; |
283 | } | |
284 | ||
a98cef7e KN |
285 | NEXT; |
286 | } | |
287 | ||
9cc649b8 AW |
288 | VM_DEFINE_INSTRUCTION (late_variable_ref, "late-variable-ref", 1, 0, 1) |
289 | { | |
6297d229 | 290 | unsigned objnum = FETCH (); |
fd358575 | 291 | SCM what; |
9cc649b8 | 292 | CHECK_OBJECT (objnum); |
fd358575 | 293 | what = OBJECT_REF (objnum); |
9cc649b8 | 294 | |
fd358575 | 295 | if (!SCM_VARIABLEP (what)) |
9cc649b8 | 296 | { |
d0168f3d | 297 | SYNC_REGISTER (); |
fd358575 | 298 | if (SCM_LIKELY (SCM_SYMBOLP (what))) |
3aabb7b7 | 299 | { |
fd358575 AW |
300 | if (SCM_LIKELY (scm_module_system_booted_p |
301 | && scm_is_true (bp->module))) | |
302 | /* might longjmp */ | |
303 | what = scm_module_lookup (bp->module, what); | |
304 | else | |
305 | what = scm_sym2var (what, SCM_BOOL_F, SCM_BOOL_F); | |
3aabb7b7 AW |
306 | } |
307 | else | |
308 | { | |
fd358575 AW |
309 | SCM mod; |
310 | /* compilation of @ or @@ | |
311 | `what' is a three-element list: (MODNAME SYM INTERFACE?) | |
312 | INTERFACE? is #t if we compiled @ or #f if we compiled @@ | |
313 | */ | |
314 | mod = scm_resolve_module (SCM_CAR (what)); | |
315 | if (scm_is_true (SCM_CADDR (what))) | |
316 | mod = scm_module_public_interface (mod); | |
317 | if (SCM_FALSEP (mod)) | |
318 | { | |
319 | err_args = SCM_LIST1 (mod); | |
320 | goto vm_error_no_such_module; | |
321 | } | |
322 | /* might longjmp */ | |
323 | what = scm_module_lookup (mod, SCM_CADR (what)); | |
3aabb7b7 AW |
324 | } |
325 | ||
fd358575 | 326 | if (!VARIABLE_BOUNDP (what)) |
9cc649b8 | 327 | { |
fd358575 | 328 | err_args = SCM_LIST1 (what); |
9cc649b8 AW |
329 | goto vm_error_unbound; |
330 | } | |
3aabb7b7 | 331 | |
fd358575 | 332 | OBJECT_SET (objnum, what); |
9cc649b8 AW |
333 | } |
334 | ||
fd358575 | 335 | PUSH (VARIABLE_REF (what)); |
9cc649b8 AW |
336 | NEXT; |
337 | } | |
338 | ||
17e90c5e KN |
339 | /* set */ |
340 | ||
46cd9a34 | 341 | VM_DEFINE_INSTRUCTION (local_set, "local-set", 1, 1, 0) |
a98cef7e | 342 | { |
17e90c5e KN |
343 | LOCAL_SET (FETCH (), *sp); |
344 | DROP (); | |
a98cef7e KN |
345 | NEXT; |
346 | } | |
347 | ||
46cd9a34 | 348 | VM_DEFINE_INSTRUCTION (external_set, "external-set", 1, 1, 0) |
a98cef7e | 349 | { |
17e90c5e KN |
350 | unsigned int i; |
351 | SCM e = external; | |
352 | for (i = FETCH (); i; i--) | |
ac02b386 KN |
353 | { |
354 | CHECK_EXTERNAL(e); | |
355 | e = SCM_CDR (e); | |
356 | } | |
357 | CHECK_EXTERNAL(e); | |
17e90c5e KN |
358 | SCM_SETCAR (e, *sp); |
359 | DROP (); | |
a98cef7e KN |
360 | NEXT; |
361 | } | |
362 | ||
46cd9a34 | 363 | VM_DEFINE_INSTRUCTION (variable_set, "variable-set", 0, 1, 0) |
a98cef7e | 364 | { |
2d80426a | 365 | VARIABLE_SET (sp[0], sp[-1]); |
11ea1aba | 366 | DROPN (2); |
a98cef7e KN |
367 | NEXT; |
368 | } | |
369 | ||
9cc649b8 AW |
370 | VM_DEFINE_INSTRUCTION (late_variable_set, "late-variable-set", 1, 1, 0) |
371 | { | |
6297d229 | 372 | unsigned objnum = FETCH (); |
fd358575 | 373 | SCM what; |
9cc649b8 | 374 | CHECK_OBJECT (objnum); |
fd358575 | 375 | what = OBJECT_REF (objnum); |
9cc649b8 | 376 | |
fd358575 | 377 | if (!SCM_VARIABLEP (what)) |
9cc649b8 | 378 | { |
6287726a | 379 | SYNC_BEFORE_GC (); |
fd358575 | 380 | if (SCM_LIKELY (SCM_SYMBOLP (what))) |
3aabb7b7 | 381 | { |
fd358575 AW |
382 | if (SCM_LIKELY (scm_module_system_booted_p |
383 | && scm_is_true (bp->module))) | |
384 | /* might longjmp */ | |
385 | what = scm_module_lookup (bp->module, what); | |
386 | else | |
387 | what = scm_sym2var (what, SCM_BOOL_F, SCM_BOOL_F); | |
3aabb7b7 AW |
388 | } |
389 | else | |
390 | { | |
fd358575 AW |
391 | SCM mod; |
392 | /* compilation of @ or @@ | |
393 | `what' is a three-element list: (MODNAME SYM INTERFACE?) | |
394 | INTERFACE? is #t if we compiled @ or #f if we compiled @@ | |
395 | */ | |
396 | mod = scm_resolve_module (SCM_CAR (what)); | |
397 | if (scm_is_true (SCM_CADDR (what))) | |
398 | mod = scm_module_public_interface (mod); | |
399 | if (SCM_FALSEP (mod)) | |
400 | { | |
401 | err_args = SCM_LIST1 (what); | |
402 | goto vm_error_no_such_module; | |
403 | } | |
404 | /* might longjmp */ | |
405 | what = scm_module_lookup (mod, SCM_CADR (what)); | |
3aabb7b7 AW |
406 | } |
407 | ||
fd358575 | 408 | OBJECT_SET (objnum, what); |
9cc649b8 AW |
409 | } |
410 | ||
fd358575 | 411 | VARIABLE_SET (what, *sp); |
9cc649b8 AW |
412 | DROP (); |
413 | NEXT; | |
414 | } | |
415 | ||
3de80ed5 AW |
416 | VM_DEFINE_INSTRUCTION (externals, "externals", 0, 0, 1) |
417 | { | |
418 | PUSH (external); | |
419 | NEXT; | |
420 | } | |
421 | ||
a98cef7e KN |
422 | \f |
423 | /* | |
424 | * branch and jump | |
425 | */ | |
426 | ||
efbd5892 AW |
427 | /* offset must be a signed short!!! */ |
428 | #define FETCH_OFFSET(offset) \ | |
17e90c5e | 429 | { \ |
41f248a8 KN |
430 | int h = FETCH (); \ |
431 | int l = FETCH (); \ | |
efbd5892 AW |
432 | offset = (h << 8) + l; \ |
433 | } | |
434 | ||
435 | #define BR(p) \ | |
436 | { \ | |
437 | signed short offset; \ | |
438 | FETCH_OFFSET (offset); \ | |
17e90c5e KN |
439 | if (p) \ |
440 | ip += offset; \ | |
11ea1aba | 441 | NULLSTACK (1); \ |
17e90c5e KN |
442 | DROP (); \ |
443 | NEXT; \ | |
444 | } | |
445 | ||
41f248a8 KN |
446 | VM_DEFINE_INSTRUCTION (br, "br", 2, 0, 0) |
447 | { | |
448 | int h = FETCH (); | |
449 | int l = FETCH (); | |
450 | ip += (signed short) (h << 8) + l; | |
451 | NEXT; | |
452 | } | |
453 | ||
454 | VM_DEFINE_INSTRUCTION (br_if, "br-if", 2, 0, 0) | |
a98cef7e | 455 | { |
17e90c5e | 456 | BR (!SCM_FALSEP (*sp)); |
a98cef7e KN |
457 | } |
458 | ||
41f248a8 | 459 | VM_DEFINE_INSTRUCTION (br_if_not, "br-if-not", 2, 0, 0) |
a98cef7e | 460 | { |
17e90c5e | 461 | BR (SCM_FALSEP (*sp)); |
a98cef7e KN |
462 | } |
463 | ||
41f248a8 | 464 | VM_DEFINE_INSTRUCTION (br_if_eq, "br-if-eq", 2, 0, 0) |
a98cef7e | 465 | { |
17e90c5e | 466 | BR (SCM_EQ_P (sp[0], sp--[1])); |
a98cef7e KN |
467 | } |
468 | ||
41f248a8 | 469 | VM_DEFINE_INSTRUCTION (br_if_not_eq, "br-if-not-eq", 2, 0, 0) |
a98cef7e | 470 | { |
17e90c5e KN |
471 | BR (!SCM_EQ_P (sp[0], sp--[1])); |
472 | } | |
473 | ||
41f248a8 | 474 | VM_DEFINE_INSTRUCTION (br_if_null, "br-if-null", 2, 0, 0) |
17e90c5e KN |
475 | { |
476 | BR (SCM_NULLP (*sp)); | |
477 | } | |
478 | ||
41f248a8 | 479 | VM_DEFINE_INSTRUCTION (br_if_not_null, "br-if-not-null", 2, 0, 0) |
17e90c5e KN |
480 | { |
481 | BR (!SCM_NULLP (*sp)); | |
a98cef7e KN |
482 | } |
483 | ||
a98cef7e KN |
484 | \f |
485 | /* | |
486 | * Subprogram call | |
487 | */ | |
488 | ||
46cd9a34 | 489 | VM_DEFINE_INSTRUCTION (make_closure, "make-closure", 0, 1, 1) |
a98cef7e | 490 | { |
3d5ee0cd KN |
491 | SYNC_BEFORE_GC (); |
492 | *sp = scm_c_make_closure (*sp, external); | |
17e90c5e | 493 | NEXT; |
a98cef7e KN |
494 | } |
495 | ||
46cd9a34 | 496 | VM_DEFINE_INSTRUCTION (call, "call", 1, -1, 1) |
a98cef7e | 497 | { |
3616e9e9 | 498 | SCM x; |
17e90c5e | 499 | nargs = FETCH (); |
a98cef7e KN |
500 | |
501 | vm_call: | |
c8b9df71 KN |
502 | x = sp[-nargs]; |
503 | ||
a98cef7e KN |
504 | /* |
505 | * Subprogram call | |
506 | */ | |
3616e9e9 | 507 | if (SCM_PROGRAM_P (x)) |
a98cef7e | 508 | { |
3616e9e9 | 509 | program = x; |
499a4c07 | 510 | CACHE_PROGRAM (); |
17e90c5e KN |
511 | INIT_ARGS (); |
512 | NEW_FRAME (); | |
17e90c5e KN |
513 | ENTER_HOOK (); |
514 | APPLY_HOOK (); | |
a98cef7e KN |
515 | NEXT; |
516 | } | |
d507b25f AW |
517 | #ifdef ENABLE_TRAMPOLINE |
518 | /* Seems to slow down the fibo test, dunno why */ | |
a98cef7e | 519 | /* |
659b4611 AW |
520 | * Subr call |
521 | */ | |
522 | switch (nargs) | |
523 | { | |
524 | case 0: | |
525 | { | |
526 | scm_t_trampoline_0 call = scm_trampoline_0 (x); | |
527 | if (call) | |
528 | { | |
529 | SYNC_ALL (); | |
530 | *sp = call (x); | |
531 | NEXT; | |
532 | } | |
533 | break; | |
534 | } | |
535 | case 1: | |
536 | { | |
537 | scm_t_trampoline_1 call = scm_trampoline_1 (x); | |
538 | if (call) | |
539 | { | |
540 | SCM arg1; | |
541 | POP (arg1); | |
542 | SYNC_ALL (); | |
543 | *sp = call (x, arg1); | |
544 | NEXT; | |
545 | } | |
546 | break; | |
547 | } | |
548 | case 2: | |
549 | { | |
550 | scm_t_trampoline_2 call = scm_trampoline_2 (x); | |
551 | if (call) | |
552 | { | |
553 | SCM arg1, arg2; | |
554 | POP (arg2); | |
555 | POP (arg1); | |
556 | SYNC_ALL (); | |
557 | *sp = call (x, arg1, arg2); | |
558 | NEXT; | |
559 | } | |
560 | break; | |
561 | } | |
562 | } | |
d507b25f | 563 | #endif |
659b4611 AW |
564 | /* |
565 | * Other interpreted or compiled call | |
a98cef7e | 566 | */ |
3616e9e9 | 567 | if (!SCM_FALSEP (scm_procedure_p (x))) |
a98cef7e | 568 | { |
f41cb00c LC |
569 | /* At this point, the stack contains the procedure and each one of its |
570 | arguments. */ | |
17e90c5e | 571 | POP_LIST (nargs); |
1865ad56 | 572 | SYNC_REGISTER (); |
887ce75a AW |
573 | /* keep args on stack so they are marked */ |
574 | sp[-1] = scm_apply (x, sp[0], SCM_EOL); | |
66db076a | 575 | NULLSTACK_FOR_NONLOCAL_EXIT (); |
76282387 | 576 | /* FIXME what if SCM_VALUESP(*sp) */ |
887ce75a | 577 | DROP (); |
17e90c5e | 578 | NEXT; |
a98cef7e KN |
579 | } |
580 | /* | |
581 | * Continuation call | |
582 | */ | |
3616e9e9 | 583 | if (SCM_VM_CONT_P (x)) |
a98cef7e | 584 | { |
fcd4901b | 585 | program = x; |
f03c31db | 586 | vm_call_continuation: |
a98cef7e | 587 | /* Check the number of arguments */ |
f03c31db | 588 | /* FIXME multiple args */ |
382693fe | 589 | if (nargs != 1) |
fcd4901b | 590 | scm_wrong_num_args (program); |
a98cef7e KN |
591 | |
592 | /* Reinstate the continuation */ | |
17e90c5e | 593 | EXIT_HOOK (); |
fcd4901b | 594 | reinstate_vm_cont (vp, program); |
3d5ee0cd | 595 | CACHE_REGISTER (); |
af988bbf | 596 | program = SCM_FRAME_PROGRAM (fp); |
3616e9e9 | 597 | CACHE_PROGRAM (); |
a98cef7e KN |
598 | NEXT; |
599 | } | |
600 | ||
66292535 | 601 | program = x; |
17e90c5e | 602 | goto vm_error_wrong_type_apply; |
a98cef7e KN |
603 | } |
604 | ||
f03c31db | 605 | VM_DEFINE_INSTRUCTION (goto_args, "goto/args", 1, -1, 1) |
a98cef7e | 606 | { |
f41cb00c | 607 | register SCM x; |
17e90c5e | 608 | nargs = FETCH (); |
f03c31db | 609 | vm_goto_args: |
3616e9e9 | 610 | x = sp[-nargs]; |
17e90c5e | 611 | |
28a2f57b | 612 | SYNC_REGISTER (); |
17e90c5e | 613 | SCM_TICK; /* allow interrupt here */ |
a98cef7e KN |
614 | |
615 | /* | |
17e90c5e | 616 | * Tail recursive call |
a98cef7e | 617 | */ |
17e90c5e | 618 | if (SCM_EQ_P (x, program)) |
a98cef7e | 619 | { |
f21dfea6 | 620 | int i; |
17e90c5e KN |
621 | |
622 | /* Move arguments */ | |
f21dfea6 KN |
623 | INIT_ARGS (); |
624 | sp -= bp->nargs - 1; | |
625 | for (i = 0; i < bp->nargs; i++) | |
626 | LOCAL_SET (i, sp[i]); | |
f41cb00c LC |
627 | |
628 | /* Drop the first argument and the program itself. */ | |
629 | sp -= 2; | |
5e390de6 AW |
630 | NULLSTACK (bp->nargs + 1); |
631 | ||
632 | /* Freshen the externals */ | |
633 | external = bp->external; | |
634 | for (i = 0; i < bp->nexts; i++) | |
635 | CONS (external, SCM_UNDEFINED, external); | |
636 | SCM_FRAME_DATA_ADDRESS (fp)[0] = external; | |
a98cef7e | 637 | |
f21dfea6 | 638 | /* Call itself */ |
17e90c5e | 639 | ip = bp->base; |
17e90c5e | 640 | APPLY_HOOK (); |
a98cef7e KN |
641 | NEXT; |
642 | } | |
28106f54 | 643 | |
17e90c5e | 644 | /* |
28106f54 | 645 | * Tail call, but not to self -- reuse the frame, keeping the ra and dl |
17e90c5e | 646 | */ |
3616e9e9 | 647 | if (SCM_PROGRAM_P (x)) |
17e90c5e | 648 | { |
28106f54 AW |
649 | SCM *data, *tail_args, *dl; |
650 | int i; | |
da320011 | 651 | scm_byte_t *ra, *mvra; |
11ea1aba AW |
652 | #ifdef VM_ENABLE_STACK_NULLING |
653 | SCM *old_sp; | |
654 | #endif | |
28106f54 | 655 | |
17e90c5e | 656 | EXIT_HOOK (); |
28106f54 AW |
657 | |
658 | /* save registers */ | |
659 | tail_args = stack_base + 2; | |
660 | ra = SCM_FRAME_RETURN_ADDRESS (fp); | |
da320011 | 661 | mvra = SCM_FRAME_MV_RETURN_ADDRESS (fp); |
28106f54 AW |
662 | dl = SCM_FRAME_DYNAMIC_LINK (fp); |
663 | ||
664 | /* switch programs */ | |
11ea1aba | 665 | program = x; |
28106f54 AW |
666 | CACHE_PROGRAM (); |
667 | INIT_ARGS (); | |
11ea1aba AW |
668 | /* delay updating the frame so that if INIT_ARGS has to cons up a rest |
669 | arg, going into GC, the stack still makes sense */ | |
670 | fp[-1] = program; | |
28106f54 AW |
671 | nargs = bp->nargs; |
672 | ||
11ea1aba AW |
673 | #ifdef VM_ENABLE_STACK_NULLING |
674 | old_sp = sp; | |
675 | CHECK_STACK_LEAK (); | |
676 | #endif | |
677 | ||
28106f54 AW |
678 | /* new registers -- logically this would be better later, but let's make |
679 | sure we have space for the locals now */ | |
680 | data = SCM_FRAME_DATA_ADDRESS (fp); | |
681 | ip = bp->base; | |
da320011 | 682 | stack_base = data + 4; |
28106f54 AW |
683 | sp = stack_base; |
684 | CHECK_OVERFLOW (); | |
685 | ||
686 | /* copy args, bottom-up */ | |
687 | for (i = 0; i < nargs; i++) | |
688 | fp[i] = tail_args[i]; | |
689 | ||
11ea1aba AW |
690 | NULLSTACK (old_sp - sp); |
691 | ||
28106f54 AW |
692 | /* init locals */ |
693 | for (i = bp->nlocs; i; i--) | |
694 | data[-i] = SCM_UNDEFINED; | |
695 | ||
28106f54 | 696 | /* Set frame data */ |
da320011 AW |
697 | data[4] = (SCM)ra; |
698 | data[3] = (SCM)mvra; | |
28106f54 AW |
699 | data[2] = (SCM)dl; |
700 | data[1] = SCM_BOOL_F; | |
11ea1aba AW |
701 | |
702 | /* Postpone initializing external vars, because if the CONS causes a GC, | |
703 | we want the stack marker to see the data array formatted as expected. */ | |
704 | data[0] = SCM_UNDEFINED; | |
705 | external = bp->external; | |
706 | for (i = 0; i < bp->nexts; i++) | |
707 | CONS (external, SCM_UNDEFINED, external); | |
28106f54 | 708 | data[0] = external; |
11ea1aba | 709 | |
28106f54 AW |
710 | ENTER_HOOK (); |
711 | APPLY_HOOK (); | |
712 | NEXT; | |
17e90c5e | 713 | } |
d507b25f AW |
714 | #ifdef ENABLE_TRAMPOLINE |
715 | /* This seems to actually slow down the fibo test -- dunno why */ | |
a98cef7e | 716 | /* |
659b4611 AW |
717 | * Subr call |
718 | */ | |
719 | switch (nargs) | |
720 | { | |
721 | case 0: | |
722 | { | |
723 | scm_t_trampoline_0 call = scm_trampoline_0 (x); | |
724 | if (call) | |
725 | { | |
726 | SYNC_ALL (); | |
727 | *sp = call (x); | |
728 | goto vm_return; | |
729 | } | |
730 | break; | |
731 | } | |
732 | case 1: | |
733 | { | |
734 | scm_t_trampoline_1 call = scm_trampoline_1 (x); | |
735 | if (call) | |
736 | { | |
737 | SCM arg1; | |
738 | POP (arg1); | |
739 | SYNC_ALL (); | |
740 | *sp = call (x, arg1); | |
741 | goto vm_return; | |
742 | } | |
743 | break; | |
744 | } | |
745 | case 2: | |
746 | { | |
747 | scm_t_trampoline_2 call = scm_trampoline_2 (x); | |
748 | if (call) | |
749 | { | |
750 | SCM arg1, arg2; | |
751 | POP (arg2); | |
752 | POP (arg1); | |
753 | SYNC_ALL (); | |
754 | *sp = call (x, arg1, arg2); | |
755 | goto vm_return; | |
756 | } | |
757 | break; | |
758 | } | |
759 | } | |
d507b25f | 760 | #endif |
659b4611 AW |
761 | |
762 | /* | |
763 | * Other interpreted or compiled call | |
a98cef7e | 764 | */ |
3616e9e9 | 765 | if (!SCM_FALSEP (scm_procedure_p (x))) |
a98cef7e | 766 | { |
17e90c5e | 767 | POP_LIST (nargs); |
1865ad56 | 768 | SYNC_REGISTER (); |
887ce75a | 769 | sp[-1] = scm_apply (x, sp[0], SCM_EOL); |
66db076a | 770 | NULLSTACK_FOR_NONLOCAL_EXIT (); |
887ce75a | 771 | DROP (); |
76282387 | 772 | /* FIXME what if SCM_VALUESP(*sp) */ |
a98cef7e KN |
773 | goto vm_return; |
774 | } | |
fcd4901b AW |
775 | |
776 | program = x; | |
777 | ||
a98cef7e KN |
778 | /* |
779 | * Continuation call | |
780 | */ | |
fcd4901b | 781 | if (SCM_VM_CONT_P (program)) |
f03c31db | 782 | goto vm_call_continuation; |
a98cef7e | 783 | |
17e90c5e KN |
784 | goto vm_error_wrong_type_apply; |
785 | } | |
786 | ||
efbd5892 AW |
787 | VM_DEFINE_INSTRUCTION (goto_nargs, "goto/nargs", 0, 0, 1) |
788 | { | |
789 | SCM x; | |
790 | POP (x); | |
791 | nargs = scm_to_int (x); | |
d51406fe | 792 | /* FIXME: should truncate values? */ |
efbd5892 AW |
793 | goto vm_goto_args; |
794 | } | |
795 | ||
796 | VM_DEFINE_INSTRUCTION (call_nargs, "call/nargs", 0, 0, 1) | |
797 | { | |
798 | SCM x; | |
799 | POP (x); | |
800 | nargs = scm_to_int (x); | |
d51406fe | 801 | /* FIXME: should truncate values? */ |
efbd5892 AW |
802 | goto vm_call; |
803 | } | |
804 | ||
805 | VM_DEFINE_INSTRUCTION (mv_call, "mv-call", 3, -1, 1) | |
a222b0fa AW |
806 | { |
807 | SCM x; | |
efbd5892 | 808 | signed short offset; |
a222b0fa AW |
809 | |
810 | nargs = FETCH (); | |
efbd5892 | 811 | FETCH_OFFSET (offset); |
a222b0fa AW |
812 | |
813 | x = sp[-nargs]; | |
814 | ||
815 | /* | |
816 | * Subprogram call | |
817 | */ | |
818 | if (SCM_PROGRAM_P (x)) | |
819 | { | |
820 | program = x; | |
821 | CACHE_PROGRAM (); | |
822 | INIT_ARGS (); | |
823 | NEW_FRAME (); | |
824 | SCM_FRAME_DATA_ADDRESS (fp)[3] = (SCM)(SCM_FRAME_RETURN_ADDRESS (fp) + offset); | |
825 | ENTER_HOOK (); | |
826 | APPLY_HOOK (); | |
827 | NEXT; | |
828 | } | |
829 | /* | |
830 | * Other interpreted or compiled call | |
831 | */ | |
832 | if (!SCM_FALSEP (scm_procedure_p (x))) | |
833 | { | |
834 | /* At this point, the stack contains the procedure and each one of its | |
835 | arguments. */ | |
a222b0fa | 836 | POP_LIST (nargs); |
a222b0fa | 837 | SYNC_REGISTER (); |
887ce75a | 838 | sp[-1] = scm_apply (x, sp[0], SCM_EOL); |
66db076a | 839 | NULLSTACK_FOR_NONLOCAL_EXIT (); |
887ce75a | 840 | DROP (); |
a222b0fa AW |
841 | if (SCM_VALUESP (*sp)) |
842 | { | |
843 | SCM values, len; | |
844 | POP (values); | |
845 | values = scm_struct_ref (values, SCM_INUM0); | |
846 | len = scm_length (values); | |
1f40459f | 847 | PUSH_LIST (values); |
a222b0fa AW |
848 | PUSH (len); |
849 | ip += offset; | |
850 | } | |
851 | NEXT; | |
852 | } | |
853 | /* | |
854 | * Continuation call | |
855 | */ | |
856 | if (SCM_VM_CONT_P (x)) | |
857 | { | |
858 | program = x; | |
859 | goto vm_call_continuation; | |
860 | } | |
861 | ||
862 | program = x; | |
863 | goto vm_error_wrong_type_apply; | |
864 | } | |
865 | ||
3616e9e9 KN |
866 | VM_DEFINE_INSTRUCTION (apply, "apply", 1, -1, 1) |
867 | { | |
c8b9df71 KN |
868 | int len; |
869 | SCM ls; | |
870 | POP (ls); | |
871 | ||
872 | nargs = FETCH (); | |
9a8cc8e7 | 873 | ASSERT (nargs >= 2); |
c8b9df71 KN |
874 | |
875 | len = scm_ilength (ls); | |
876 | if (len < 0) | |
877 | goto vm_error_wrong_type_arg; | |
878 | ||
1f40459f | 879 | PUSH_LIST (ls); |
c8b9df71 KN |
880 | |
881 | nargs += len - 2; | |
882 | goto vm_call; | |
3616e9e9 KN |
883 | } |
884 | ||
f03c31db AW |
885 | VM_DEFINE_INSTRUCTION (goto_apply, "goto/apply", 1, -1, 1) |
886 | { | |
887 | int len; | |
888 | SCM ls; | |
889 | POP (ls); | |
890 | ||
891 | nargs = FETCH (); | |
9a8cc8e7 | 892 | ASSERT (nargs >= 2); |
f03c31db AW |
893 | |
894 | len = scm_ilength (ls); | |
895 | if (len < 0) | |
896 | goto vm_error_wrong_type_arg; | |
897 | ||
1f40459f | 898 | PUSH_LIST (ls); |
f03c31db AW |
899 | |
900 | nargs += len - 2; | |
901 | goto vm_goto_args; | |
902 | } | |
903 | ||
76282387 | 904 | VM_DEFINE_INSTRUCTION (call_cc, "call/cc", 0, 1, 1) |
17e90c5e | 905 | { |
76282387 AW |
906 | int first; |
907 | SCM proc, cont; | |
908 | POP (proc); | |
909 | SYNC_ALL (); | |
910 | cont = scm_make_continuation (&first); | |
911 | if (first) | |
912 | { | |
913 | PUSH (proc); | |
914 | PUSH (cont); | |
915 | nargs = 1; | |
916 | goto vm_call; | |
917 | } | |
11ea1aba AW |
918 | ASSERT (sp == vp->sp); |
919 | ASSERT (fp == vp->fp); | |
76282387 AW |
920 | else if (SCM_VALUESP (cont)) |
921 | { | |
922 | /* multiple values returned to continuation */ | |
923 | SCM values; | |
924 | values = scm_struct_ref (cont, SCM_INUM0); | |
925 | if (SCM_NULLP (values)) | |
9a8cc8e7 | 926 | goto vm_error_no_values; |
76282387 AW |
927 | /* non-tail context does not accept multiple values? */ |
928 | PUSH (SCM_CAR (values)); | |
929 | NEXT; | |
930 | } | |
931 | else | |
932 | { | |
933 | PUSH (cont); | |
934 | NEXT; | |
935 | } | |
a98cef7e KN |
936 | } |
937 | ||
76282387 | 938 | VM_DEFINE_INSTRUCTION (goto_cc, "goto/cc", 0, 1, 1) |
f03c31db | 939 | { |
76282387 AW |
940 | int first; |
941 | SCM proc, cont; | |
942 | POP (proc); | |
943 | SYNC_ALL (); | |
944 | cont = scm_make_continuation (&first); | |
66db076a AW |
945 | ASSERT (sp == vp->sp); |
946 | ASSERT (fp == vp->fp); | |
76282387 AW |
947 | if (first) |
948 | { | |
949 | PUSH (proc); | |
950 | PUSH (cont); | |
951 | nargs = 1; | |
952 | goto vm_goto_args; | |
953 | } | |
954 | else if (SCM_VALUESP (cont)) | |
955 | { | |
956 | /* multiple values returned to continuation */ | |
957 | SCM values; | |
958 | values = scm_struct_ref (cont, SCM_INUM0); | |
959 | nvalues = scm_ilength (values); | |
1f40459f | 960 | PUSH_LIST (values); |
76282387 AW |
961 | goto vm_return_values; |
962 | } | |
963 | else | |
964 | { | |
965 | PUSH (cont); | |
966 | goto vm_return; | |
967 | } | |
f03c31db AW |
968 | } |
969 | ||
46cd9a34 | 970 | VM_DEFINE_INSTRUCTION (return, "return", 0, 0, 1) |
a98cef7e | 971 | { |
a98cef7e | 972 | vm_return: |
17e90c5e KN |
973 | EXIT_HOOK (); |
974 | RETURN_HOOK (); | |
f13c269b AW |
975 | { |
976 | SCM ret, *data; | |
977 | data = SCM_FRAME_DATA_ADDRESS (fp); | |
978 | ||
979 | POP (ret); | |
11ea1aba AW |
980 | ASSERT (sp == stack_base); |
981 | ASSERT (stack_base == data + 4); | |
f13c269b AW |
982 | |
983 | /* Restore registers */ | |
984 | sp = SCM_FRAME_LOWER_ADDRESS (fp); | |
da320011 | 985 | ip = SCM_FRAME_BYTE_CAST (data[4]); |
f13c269b | 986 | fp = SCM_FRAME_STACK_CAST (data[2]); |
11ea1aba AW |
987 | { |
988 | #ifdef VM_ENABLE_STACK_NULLING | |
989 | int nullcount = stack_base - sp; | |
990 | #endif | |
991 | stack_base = SCM_FRAME_UPPER_ADDRESS (fp) - 1; | |
992 | NULLSTACK (nullcount); | |
993 | } | |
f13c269b AW |
994 | |
995 | /* Set return value (sp is already pushed) */ | |
996 | *sp = ret; | |
997 | } | |
17e90c5e | 998 | |
15df3447 | 999 | /* Restore the last program */ |
af988bbf | 1000 | program = SCM_FRAME_PROGRAM (fp); |
499a4c07 | 1001 | CACHE_PROGRAM (); |
af988bbf | 1002 | CACHE_EXTERNAL (); |
7e4760e4 | 1003 | CHECK_IP (); |
a98cef7e KN |
1004 | NEXT; |
1005 | } | |
17e90c5e | 1006 | |
a222b0fa AW |
1007 | VM_DEFINE_INSTRUCTION (return_values, "return/values", 1, -1, -1) |
1008 | { | |
ef24c01b AW |
1009 | /* nvalues declared at top level, because for some reason gcc seems to think |
1010 | that perhaps it might be used without declaration. Fooey to that, I say. */ | |
1011 | SCM *data; | |
1012 | ||
1013 | nvalues = FETCH (); | |
1014 | vm_return_values: | |
a222b0fa AW |
1015 | EXIT_HOOK (); |
1016 | RETURN_HOOK (); | |
ef24c01b AW |
1017 | |
1018 | data = SCM_FRAME_DATA_ADDRESS (fp); | |
11ea1aba | 1019 | ASSERT (stack_base == data + 4); |
a222b0fa | 1020 | |
ef24c01b AW |
1021 | /* data[3] is the mv return address */ |
1022 | if (nvalues != 1 && data[3]) | |
1023 | { | |
1024 | int i; | |
1025 | /* Restore registers */ | |
1026 | sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1; | |
1027 | ip = SCM_FRAME_BYTE_CAST (data[3]); /* multiple value ra */ | |
1028 | fp = SCM_FRAME_STACK_CAST (data[2]); | |
a222b0fa | 1029 | |
ef24c01b AW |
1030 | /* Push return values, and the number of values */ |
1031 | for (i = 0; i < nvalues; i++) | |
1032 | *++sp = stack_base[1+i]; | |
1033 | *++sp = SCM_I_MAKINUM (nvalues); | |
a222b0fa | 1034 | |
ef24c01b | 1035 | /* Finally set new stack_base */ |
11ea1aba | 1036 | NULLSTACK (stack_base - sp + nvalues + 1); |
ef24c01b AW |
1037 | stack_base = SCM_FRAME_UPPER_ADDRESS (fp) - 1; |
1038 | } | |
1039 | else if (nvalues >= 1) | |
1040 | { | |
1041 | /* Multiple values for a single-valued continuation -- here's where I | |
1042 | break with guile tradition and try and do something sensible. (Also, | |
1043 | this block handles the single-valued return to an mv | |
1044 | continuation.) */ | |
1045 | /* Restore registers */ | |
1046 | sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1; | |
1047 | ip = SCM_FRAME_BYTE_CAST (data[4]); /* single value ra */ | |
1048 | fp = SCM_FRAME_STACK_CAST (data[2]); | |
a222b0fa | 1049 | |
ef24c01b AW |
1050 | /* Push first value */ |
1051 | *++sp = stack_base[1]; | |
a222b0fa | 1052 | |
ef24c01b | 1053 | /* Finally set new stack_base */ |
11ea1aba | 1054 | NULLSTACK (stack_base - sp); |
ef24c01b AW |
1055 | stack_base = SCM_FRAME_UPPER_ADDRESS (fp) - 1; |
1056 | } | |
1057 | else | |
1058 | goto vm_error_no_values; | |
a222b0fa AW |
1059 | |
1060 | /* Restore the last program */ | |
1061 | program = SCM_FRAME_PROGRAM (fp); | |
1062 | CACHE_PROGRAM (); | |
1063 | CACHE_EXTERNAL (); | |
1064 | CHECK_IP (); | |
1065 | NEXT; | |
1066 | } | |
1067 | ||
ef24c01b AW |
1068 | VM_DEFINE_INSTRUCTION (return_values_star, "return/values*", 1, -1, -1) |
1069 | { | |
1070 | SCM l; | |
1071 | ||
1072 | nvalues = FETCH (); | |
11ea1aba | 1073 | ASSERT (nvalues >= 1); |
ef24c01b AW |
1074 | |
1075 | nvalues--; | |
1076 | POP (l); | |
1077 | while (SCM_CONSP (l)) | |
1078 | { | |
1079 | PUSH (SCM_CAR (l)); | |
1080 | l = SCM_CDR (l); | |
1081 | nvalues++; | |
1082 | } | |
1083 | ||
1084 | goto vm_return_values; | |
1085 | } | |
1086 | ||
d51406fe AW |
1087 | VM_DEFINE_INSTRUCTION (truncate_values, "truncate-values", 2, -1, -1) |
1088 | { | |
1089 | SCM x; | |
1090 | int nbinds, rest; | |
1091 | POP (x); | |
1092 | nvalues = scm_to_int (x); | |
1093 | nbinds = FETCH (); | |
1094 | rest = FETCH (); | |
1095 | ||
1096 | if (rest) | |
1097 | nbinds--; | |
1098 | ||
1099 | if (nvalues < nbinds) | |
1100 | goto vm_error_not_enough_values; | |
1101 | ||
1102 | if (rest) | |
1103 | POP_LIST (nvalues - nbinds); | |
1104 | else | |
1105 | DROPN (nvalues - nbinds); | |
1106 | ||
1107 | NEXT; | |
1108 | } | |
1109 | ||
17e90c5e KN |
1110 | /* |
1111 | Local Variables: | |
1112 | c-file-style: "gnu" | |
1113 | End: | |
1114 | */ |