Commit | Line | Data |
---|---|---|
53e28ed9 | 1 | /* Copyright (C) 2001,2008,2009 Free Software Foundation, Inc. |
a98cef7e | 2 | * |
53e28ed9 AW |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
a98cef7e | 7 | * |
53e28ed9 AW |
8 | * This library 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 GNU | |
11 | * Lesser General Public License for more details. | |
a98cef7e | 12 | * |
53e28ed9 AW |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
a98cef7e KN |
18 | |
19 | /* This file is included in vm_engine.c */ | |
20 | ||
a98cef7e KN |
21 | \f |
22 | /* | |
23 | * Basic operations | |
24 | */ | |
25 | ||
53e28ed9 | 26 | VM_DEFINE_INSTRUCTION (0, nop, "nop", 0, 0, 0) |
a98cef7e KN |
27 | { |
28 | NEXT; | |
29 | } | |
30 | ||
53e28ed9 | 31 | VM_DEFINE_INSTRUCTION (1, halt, "halt", 0, 0, 0) |
a98cef7e | 32 | { |
a6df585a | 33 | SCM ret; |
3d5ee0cd | 34 | vp->time += scm_c_get_internal_run_time () - start_time; |
17e90c5e | 35 | HALT_HOOK (); |
a222b0fa | 36 | nvalues = SCM_I_INUM (*sp--); |
11ea1aba | 37 | NULLSTACK (1); |
a222b0fa AW |
38 | if (nvalues == 1) |
39 | POP (ret); | |
40 | else | |
41 | { | |
42 | POP_LIST (nvalues); | |
43 | POP (ret); | |
877ffa3f | 44 | SYNC_REGISTER (); |
a222b0fa AW |
45 | ret = scm_values (ret); |
46 | } | |
47 | ||
1dc8f851 | 48 | { |
11ea1aba AW |
49 | ASSERT (sp == stack_base); |
50 | ASSERT (stack_base == SCM_FRAME_UPPER_ADDRESS (fp) - 1); | |
1dc8f851 AW |
51 | |
52 | /* Restore registers */ | |
53 | sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1; | |
54 | ip = NULL; | |
55 | fp = SCM_FRAME_DYNAMIC_LINK (fp); | |
11ea1aba | 56 | NULLSTACK (stack_base - sp); |
1dc8f851 | 57 | } |
17e90c5e KN |
58 | SYNC_ALL (); |
59 | return ret; | |
a98cef7e KN |
60 | } |
61 | ||
53e28ed9 | 62 | VM_DEFINE_INSTRUCTION (2, break, "break", 0, 0, 0) |
7a0d0cee KN |
63 | { |
64 | BREAK_HOOK (); | |
65 | NEXT; | |
66 | } | |
67 | ||
53e28ed9 | 68 | VM_DEFINE_INSTRUCTION (3, drop, "drop", 0, 0, 0) |
a98cef7e | 69 | { |
17e90c5e | 70 | DROP (); |
a98cef7e KN |
71 | NEXT; |
72 | } | |
73 | ||
53e28ed9 | 74 | VM_DEFINE_INSTRUCTION (4, mark, "mark", 0, 0, 1) |
cb4cca12 KN |
75 | { |
76 | PUSH (SCM_UNDEFINED); | |
77 | NEXT; | |
78 | } | |
79 | ||
53e28ed9 | 80 | VM_DEFINE_INSTRUCTION (5, dup, "dup", 0, 0, 1) |
26403690 | 81 | { |
f349065e KN |
82 | SCM x = *sp; |
83 | PUSH (x); | |
26403690 KN |
84 | NEXT; |
85 | } | |
86 | ||
17e90c5e KN |
87 | \f |
88 | /* | |
89 | * Object creation | |
90 | */ | |
a98cef7e | 91 | |
53e28ed9 | 92 | VM_DEFINE_INSTRUCTION (6, void, "void", 0, 0, 1) |
a98cef7e | 93 | { |
17e90c5e | 94 | PUSH (SCM_UNSPECIFIED); |
a98cef7e KN |
95 | NEXT; |
96 | } | |
97 | ||
53e28ed9 | 98 | VM_DEFINE_INSTRUCTION (7, make_true, "make-true", 0, 0, 1) |
a98cef7e | 99 | { |
17e90c5e | 100 | PUSH (SCM_BOOL_T); |
a98cef7e KN |
101 | NEXT; |
102 | } | |
103 | ||
53e28ed9 | 104 | VM_DEFINE_INSTRUCTION (8, make_false, "make-false", 0, 0, 1) |
a98cef7e | 105 | { |
17e90c5e | 106 | PUSH (SCM_BOOL_F); |
a98cef7e KN |
107 | NEXT; |
108 | } | |
109 | ||
53e28ed9 | 110 | VM_DEFINE_INSTRUCTION (9, make_eol, "make-eol", 0, 0, 1) |
a98cef7e | 111 | { |
17e90c5e | 112 | PUSH (SCM_EOL); |
a98cef7e KN |
113 | NEXT; |
114 | } | |
115 | ||
53e28ed9 | 116 | VM_DEFINE_INSTRUCTION (10, make_int8, "make-int8", 1, 0, 1) |
a98cef7e | 117 | { |
2d80426a | 118 | PUSH (SCM_I_MAKINUM ((signed char) FETCH ())); |
a98cef7e KN |
119 | NEXT; |
120 | } | |
121 | ||
53e28ed9 | 122 | VM_DEFINE_INSTRUCTION (11, make_int8_0, "make-int8:0", 0, 0, 1) |
a98cef7e | 123 | { |
238e7a11 | 124 | PUSH (SCM_INUM0); |
a98cef7e KN |
125 | NEXT; |
126 | } | |
127 | ||
53e28ed9 | 128 | VM_DEFINE_INSTRUCTION (12, make_int8_1, "make-int8:1", 0, 0, 1) |
a98cef7e | 129 | { |
238e7a11 | 130 | PUSH (SCM_I_MAKINUM (1)); |
a98cef7e KN |
131 | NEXT; |
132 | } | |
133 | ||
53e28ed9 | 134 | VM_DEFINE_INSTRUCTION (13, make_int16, "make-int16", 2, 0, 1) |
a98cef7e | 135 | { |
ea9b4b29 KN |
136 | int h = FETCH (); |
137 | int l = FETCH (); | |
2d80426a | 138 | PUSH (SCM_I_MAKINUM ((signed short) (h << 8) + l)); |
a98cef7e KN |
139 | NEXT; |
140 | } | |
141 | ||
53e28ed9 | 142 | VM_DEFINE_INSTRUCTION (14, make_char8, "make-char8", 1, 0, 1) |
a98cef7e | 143 | { |
17e90c5e | 144 | PUSH (SCM_MAKE_CHAR (FETCH ())); |
a98cef7e KN |
145 | NEXT; |
146 | } | |
147 | ||
53e28ed9 | 148 | VM_DEFINE_INSTRUCTION (15, list, "list", 2, -1, 1) |
cb4cca12 | 149 | { |
23b587b0 LC |
150 | unsigned h = FETCH (); |
151 | unsigned l = FETCH (); | |
152 | unsigned len = ((h << 8) + l); | |
153 | POP_LIST (len); | |
cb4cca12 KN |
154 | NEXT; |
155 | } | |
156 | ||
53e28ed9 | 157 | VM_DEFINE_INSTRUCTION (16, vector, "vector", 2, -1, 1) |
cb4cca12 | 158 | { |
23b587b0 LC |
159 | unsigned h = FETCH (); |
160 | unsigned l = FETCH (); | |
161 | unsigned len = ((h << 8) + l); | |
5338b62b AW |
162 | SCM vect; |
163 | ||
877ffa3f | 164 | SYNC_REGISTER (); |
5338b62b AW |
165 | sp++; sp -= len; |
166 | CHECK_UNDERFLOW (); | |
167 | vect = scm_make_vector (scm_from_uint (len), SCM_BOOL_F); | |
168 | memcpy (SCM_I_VECTOR_WELTS(vect), sp, sizeof(SCM) * len); | |
169 | NULLSTACK (len); | |
170 | *sp = vect; | |
171 | ||
cb4cca12 KN |
172 | NEXT; |
173 | } | |
174 | ||
53e28ed9 | 175 | VM_DEFINE_INSTRUCTION (17, list_mark, "list-mark", 0, 0, 0) |
cb4cca12 KN |
176 | { |
177 | POP_LIST_MARK (); | |
178 | NEXT; | |
179 | } | |
180 | ||
53e28ed9 | 181 | VM_DEFINE_INSTRUCTION (18, cons_mark, "cons-mark", 0, 0, 0) |
2bd859c8 AW |
182 | { |
183 | POP_CONS_MARK (); | |
184 | NEXT; | |
185 | } | |
186 | ||
53e28ed9 | 187 | VM_DEFINE_INSTRUCTION (19, vector_mark, "vector-mark", 0, 0, 0) |
cb4cca12 KN |
188 | { |
189 | POP_LIST_MARK (); | |
877ffa3f | 190 | SYNC_REGISTER (); |
cb4cca12 KN |
191 | *sp = scm_vector (*sp); |
192 | NEXT; | |
193 | } | |
194 | ||
53e28ed9 | 195 | VM_DEFINE_INSTRUCTION (20, list_break, "list-break", 0, 0, 0) |
cb4cca12 KN |
196 | { |
197 | SCM l; | |
198 | POP (l); | |
fb10a008 | 199 | PUSH_LIST (l, SCM_NULLP); |
cb4cca12 KN |
200 | NEXT; |
201 | } | |
202 | ||
a98cef7e KN |
203 | \f |
204 | /* | |
17e90c5e | 205 | * Variable access |
a98cef7e KN |
206 | */ |
207 | ||
17e90c5e KN |
208 | #define OBJECT_REF(i) objects[i] |
209 | #define OBJECT_SET(i,o) objects[i] = o | |
a98cef7e | 210 | |
af988bbf KN |
211 | #define LOCAL_REF(i) SCM_FRAME_VARIABLE (fp, i) |
212 | #define LOCAL_SET(i,o) SCM_FRAME_VARIABLE (fp, i) = o | |
a98cef7e | 213 | |
2d80426a LC |
214 | /* For the variable operations, we _must_ obviously avoid function calls to |
215 | `scm_variable_ref ()', `scm_variable_bound_p ()' and friends which do | |
216 | nothing more than the corresponding macros. */ | |
217 | #define VARIABLE_REF(v) SCM_VARIABLE_REF (v) | |
218 | #define VARIABLE_SET(v,o) SCM_VARIABLE_SET (v, o) | |
219 | #define VARIABLE_BOUNDP(v) (VARIABLE_REF (v) != SCM_UNDEFINED) | |
a98cef7e | 220 | |
17e90c5e | 221 | /* ref */ |
a98cef7e | 222 | |
53e28ed9 | 223 | VM_DEFINE_INSTRUCTION (21, object_ref, "object-ref", 1, 0, 1) |
a98cef7e | 224 | { |
a52b2d3d | 225 | register unsigned objnum = FETCH (); |
0b5f0e49 LC |
226 | CHECK_OBJECT (objnum); |
227 | PUSH (OBJECT_REF (objnum)); | |
17e90c5e | 228 | NEXT; |
a98cef7e KN |
229 | } |
230 | ||
53e28ed9 | 231 | VM_DEFINE_INSTRUCTION (22, local_ref, "local-ref", 1, 0, 1) |
a98cef7e | 232 | { |
17e90c5e KN |
233 | PUSH (LOCAL_REF (FETCH ())); |
234 | NEXT; | |
a98cef7e KN |
235 | } |
236 | ||
53e28ed9 | 237 | VM_DEFINE_INSTRUCTION (23, external_ref, "external-ref", 1, 0, 1) |
a98cef7e | 238 | { |
17e90c5e KN |
239 | unsigned int i; |
240 | SCM e = external; | |
241 | for (i = FETCH (); i; i--) | |
2a63758b KN |
242 | { |
243 | CHECK_EXTERNAL(e); | |
244 | e = SCM_CDR (e); | |
245 | } | |
246 | CHECK_EXTERNAL(e); | |
17e90c5e | 247 | PUSH (SCM_CAR (e)); |
a98cef7e KN |
248 | NEXT; |
249 | } | |
250 | ||
53e28ed9 | 251 | VM_DEFINE_INSTRUCTION (24, variable_ref, "variable-ref", 0, 0, 1) |
a98cef7e | 252 | { |
17e90c5e | 253 | SCM x = *sp; |
238e7a11 | 254 | |
2d80426a | 255 | if (!VARIABLE_BOUNDP (x)) |
17e90c5e | 256 | { |
238e7a11 LC |
257 | err_args = SCM_LIST1 (x); |
258 | /* Was: err_args = SCM_LIST1 (SCM_CAR (x)); */ | |
17e90c5e KN |
259 | goto vm_error_unbound; |
260 | } | |
238e7a11 LC |
261 | else |
262 | { | |
2d80426a | 263 | SCM o = VARIABLE_REF (x); |
238e7a11 LC |
264 | *sp = o; |
265 | } | |
266 | ||
a98cef7e KN |
267 | NEXT; |
268 | } | |
269 | ||
53e28ed9 | 270 | VM_DEFINE_INSTRUCTION (25, toplevel_ref, "toplevel-ref", 1, 0, 1) |
9cc649b8 | 271 | { |
6297d229 | 272 | unsigned objnum = FETCH (); |
fd358575 | 273 | SCM what; |
9cc649b8 | 274 | CHECK_OBJECT (objnum); |
fd358575 | 275 | what = OBJECT_REF (objnum); |
9cc649b8 | 276 | |
fd358575 | 277 | if (!SCM_VARIABLEP (what)) |
9cc649b8 | 278 | { |
d0168f3d | 279 | SYNC_REGISTER (); |
fd358575 | 280 | if (SCM_LIKELY (SCM_SYMBOLP (what))) |
3aabb7b7 | 281 | { |
2fda0242 | 282 | SCM mod; |
fd358575 | 283 | if (SCM_LIKELY (scm_module_system_booted_p |
2fda0242 | 284 | && scm_is_true ((mod = scm_program_module (program))))) |
fd358575 | 285 | /* might longjmp */ |
2fda0242 | 286 | what = scm_module_lookup (mod, what); |
fd358575 AW |
287 | else |
288 | what = scm_sym2var (what, SCM_BOOL_F, SCM_BOOL_F); | |
3aabb7b7 AW |
289 | } |
290 | else | |
291 | { | |
fd358575 AW |
292 | SCM mod; |
293 | /* compilation of @ or @@ | |
294 | `what' is a three-element list: (MODNAME SYM INTERFACE?) | |
295 | INTERFACE? is #t if we compiled @ or #f if we compiled @@ | |
296 | */ | |
297 | mod = scm_resolve_module (SCM_CAR (what)); | |
298 | if (scm_is_true (SCM_CADDR (what))) | |
299 | mod = scm_module_public_interface (mod); | |
300 | if (SCM_FALSEP (mod)) | |
301 | { | |
302 | err_args = SCM_LIST1 (mod); | |
303 | goto vm_error_no_such_module; | |
304 | } | |
305 | /* might longjmp */ | |
306 | what = scm_module_lookup (mod, SCM_CADR (what)); | |
3aabb7b7 AW |
307 | } |
308 | ||
fd358575 | 309 | if (!VARIABLE_BOUNDP (what)) |
9cc649b8 | 310 | { |
fd358575 | 311 | err_args = SCM_LIST1 (what); |
9cc649b8 AW |
312 | goto vm_error_unbound; |
313 | } | |
3aabb7b7 | 314 | |
fd358575 | 315 | OBJECT_SET (objnum, what); |
9cc649b8 AW |
316 | } |
317 | ||
fd358575 | 318 | PUSH (VARIABLE_REF (what)); |
9cc649b8 AW |
319 | NEXT; |
320 | } | |
321 | ||
17e90c5e KN |
322 | /* set */ |
323 | ||
53e28ed9 | 324 | VM_DEFINE_INSTRUCTION (26, local_set, "local-set", 1, 1, 0) |
a98cef7e | 325 | { |
17e90c5e KN |
326 | LOCAL_SET (FETCH (), *sp); |
327 | DROP (); | |
a98cef7e KN |
328 | NEXT; |
329 | } | |
330 | ||
53e28ed9 | 331 | VM_DEFINE_INSTRUCTION (27, external_set, "external-set", 1, 1, 0) |
a98cef7e | 332 | { |
17e90c5e KN |
333 | unsigned int i; |
334 | SCM e = external; | |
335 | for (i = FETCH (); i; i--) | |
ac02b386 KN |
336 | { |
337 | CHECK_EXTERNAL(e); | |
338 | e = SCM_CDR (e); | |
339 | } | |
340 | CHECK_EXTERNAL(e); | |
17e90c5e KN |
341 | SCM_SETCAR (e, *sp); |
342 | DROP (); | |
a98cef7e KN |
343 | NEXT; |
344 | } | |
345 | ||
53e28ed9 | 346 | VM_DEFINE_INSTRUCTION (28, variable_set, "variable-set", 0, 1, 0) |
a98cef7e | 347 | { |
2d80426a | 348 | VARIABLE_SET (sp[0], sp[-1]); |
11ea1aba | 349 | DROPN (2); |
a98cef7e KN |
350 | NEXT; |
351 | } | |
352 | ||
53e28ed9 | 353 | VM_DEFINE_INSTRUCTION (29, toplevel_set, "toplevel-set", 1, 1, 0) |
9cc649b8 | 354 | { |
6297d229 | 355 | unsigned objnum = FETCH (); |
fd358575 | 356 | SCM what; |
9cc649b8 | 357 | CHECK_OBJECT (objnum); |
fd358575 | 358 | what = OBJECT_REF (objnum); |
9cc649b8 | 359 | |
fd358575 | 360 | if (!SCM_VARIABLEP (what)) |
9cc649b8 | 361 | { |
6287726a | 362 | SYNC_BEFORE_GC (); |
fd358575 | 363 | if (SCM_LIKELY (SCM_SYMBOLP (what))) |
3aabb7b7 | 364 | { |
2fda0242 | 365 | SCM mod; |
fd358575 | 366 | if (SCM_LIKELY (scm_module_system_booted_p |
2fda0242 | 367 | && scm_is_true ((mod = scm_program_module (program))))) |
fd358575 | 368 | /* might longjmp */ |
2fda0242 | 369 | what = scm_module_lookup (mod, what); |
fd358575 AW |
370 | else |
371 | what = scm_sym2var (what, SCM_BOOL_F, SCM_BOOL_F); | |
3aabb7b7 AW |
372 | } |
373 | else | |
374 | { | |
fd358575 AW |
375 | SCM mod; |
376 | /* compilation of @ or @@ | |
377 | `what' is a three-element list: (MODNAME SYM INTERFACE?) | |
378 | INTERFACE? is #t if we compiled @ or #f if we compiled @@ | |
379 | */ | |
380 | mod = scm_resolve_module (SCM_CAR (what)); | |
381 | if (scm_is_true (SCM_CADDR (what))) | |
382 | mod = scm_module_public_interface (mod); | |
383 | if (SCM_FALSEP (mod)) | |
384 | { | |
385 | err_args = SCM_LIST1 (what); | |
386 | goto vm_error_no_such_module; | |
387 | } | |
388 | /* might longjmp */ | |
389 | what = scm_module_lookup (mod, SCM_CADR (what)); | |
3aabb7b7 AW |
390 | } |
391 | ||
fd358575 | 392 | OBJECT_SET (objnum, what); |
9cc649b8 AW |
393 | } |
394 | ||
fd358575 | 395 | VARIABLE_SET (what, *sp); |
9cc649b8 AW |
396 | DROP (); |
397 | NEXT; | |
398 | } | |
399 | ||
53e28ed9 | 400 | VM_DEFINE_INSTRUCTION (30, externals, "externals", 0, 0, 1) |
3de80ed5 AW |
401 | { |
402 | PUSH (external); | |
403 | NEXT; | |
404 | } | |
405 | ||
a98cef7e KN |
406 | \f |
407 | /* | |
408 | * branch and jump | |
409 | */ | |
410 | ||
efbd5892 AW |
411 | /* offset must be a signed short!!! */ |
412 | #define FETCH_OFFSET(offset) \ | |
17e90c5e | 413 | { \ |
41f248a8 KN |
414 | int h = FETCH (); \ |
415 | int l = FETCH (); \ | |
efbd5892 AW |
416 | offset = (h << 8) + l; \ |
417 | } | |
418 | ||
419 | #define BR(p) \ | |
420 | { \ | |
421 | signed short offset; \ | |
422 | FETCH_OFFSET (offset); \ | |
17e90c5e KN |
423 | if (p) \ |
424 | ip += offset; \ | |
11ea1aba | 425 | NULLSTACK (1); \ |
17e90c5e KN |
426 | DROP (); \ |
427 | NEXT; \ | |
428 | } | |
429 | ||
53e28ed9 | 430 | VM_DEFINE_INSTRUCTION (31, br, "br", 2, 0, 0) |
41f248a8 KN |
431 | { |
432 | int h = FETCH (); | |
433 | int l = FETCH (); | |
434 | ip += (signed short) (h << 8) + l; | |
435 | NEXT; | |
436 | } | |
437 | ||
53e28ed9 | 438 | VM_DEFINE_INSTRUCTION (32, br_if, "br-if", 2, 0, 0) |
a98cef7e | 439 | { |
17e90c5e | 440 | BR (!SCM_FALSEP (*sp)); |
a98cef7e KN |
441 | } |
442 | ||
53e28ed9 | 443 | VM_DEFINE_INSTRUCTION (33, br_if_not, "br-if-not", 2, 0, 0) |
a98cef7e | 444 | { |
17e90c5e | 445 | BR (SCM_FALSEP (*sp)); |
a98cef7e KN |
446 | } |
447 | ||
53e28ed9 | 448 | VM_DEFINE_INSTRUCTION (34, br_if_eq, "br-if-eq", 2, 0, 0) |
a98cef7e | 449 | { |
17e90c5e | 450 | BR (SCM_EQ_P (sp[0], sp--[1])); |
a98cef7e KN |
451 | } |
452 | ||
53e28ed9 | 453 | VM_DEFINE_INSTRUCTION (35, br_if_not_eq, "br-if-not-eq", 2, 0, 0) |
a98cef7e | 454 | { |
17e90c5e KN |
455 | BR (!SCM_EQ_P (sp[0], sp--[1])); |
456 | } | |
457 | ||
53e28ed9 | 458 | VM_DEFINE_INSTRUCTION (36, br_if_null, "br-if-null", 2, 0, 0) |
17e90c5e KN |
459 | { |
460 | BR (SCM_NULLP (*sp)); | |
461 | } | |
462 | ||
53e28ed9 | 463 | VM_DEFINE_INSTRUCTION (37, br_if_not_null, "br-if-not-null", 2, 0, 0) |
17e90c5e KN |
464 | { |
465 | BR (!SCM_NULLP (*sp)); | |
a98cef7e KN |
466 | } |
467 | ||
a98cef7e KN |
468 | \f |
469 | /* | |
470 | * Subprogram call | |
471 | */ | |
472 | ||
53e28ed9 | 473 | VM_DEFINE_INSTRUCTION (38, make_closure, "make-closure", 0, 1, 1) |
a98cef7e | 474 | { |
3d5ee0cd | 475 | SYNC_BEFORE_GC (); |
53e28ed9 AW |
476 | *sp = scm_make_program (SCM_PROGRAM_OBJCODE (*sp), |
477 | SCM_PROGRAM_OBJTABLE (*sp), | |
478 | external); | |
17e90c5e | 479 | NEXT; |
a98cef7e KN |
480 | } |
481 | ||
53e28ed9 | 482 | VM_DEFINE_INSTRUCTION (39, call, "call", 1, -1, 1) |
a98cef7e | 483 | { |
3616e9e9 | 484 | SCM x; |
17e90c5e | 485 | nargs = FETCH (); |
a98cef7e KN |
486 | |
487 | vm_call: | |
c8b9df71 KN |
488 | x = sp[-nargs]; |
489 | ||
e311f5fa AW |
490 | SYNC_REGISTER (); |
491 | SCM_TICK; /* allow interrupt here */ | |
492 | ||
a98cef7e KN |
493 | /* |
494 | * Subprogram call | |
495 | */ | |
3616e9e9 | 496 | if (SCM_PROGRAM_P (x)) |
a98cef7e | 497 | { |
3616e9e9 | 498 | program = x; |
499a4c07 | 499 | CACHE_PROGRAM (); |
17e90c5e KN |
500 | INIT_ARGS (); |
501 | NEW_FRAME (); | |
17e90c5e KN |
502 | ENTER_HOOK (); |
503 | APPLY_HOOK (); | |
a98cef7e KN |
504 | NEXT; |
505 | } | |
d507b25f AW |
506 | #ifdef ENABLE_TRAMPOLINE |
507 | /* Seems to slow down the fibo test, dunno why */ | |
a98cef7e | 508 | /* |
659b4611 AW |
509 | * Subr call |
510 | */ | |
511 | switch (nargs) | |
512 | { | |
513 | case 0: | |
514 | { | |
515 | scm_t_trampoline_0 call = scm_trampoline_0 (x); | |
516 | if (call) | |
517 | { | |
518 | SYNC_ALL (); | |
519 | *sp = call (x); | |
520 | NEXT; | |
521 | } | |
522 | break; | |
523 | } | |
524 | case 1: | |
525 | { | |
526 | scm_t_trampoline_1 call = scm_trampoline_1 (x); | |
527 | if (call) | |
528 | { | |
529 | SCM arg1; | |
530 | POP (arg1); | |
531 | SYNC_ALL (); | |
532 | *sp = call (x, arg1); | |
533 | NEXT; | |
534 | } | |
535 | break; | |
536 | } | |
537 | case 2: | |
538 | { | |
539 | scm_t_trampoline_2 call = scm_trampoline_2 (x); | |
540 | if (call) | |
541 | { | |
542 | SCM arg1, arg2; | |
543 | POP (arg2); | |
544 | POP (arg1); | |
545 | SYNC_ALL (); | |
546 | *sp = call (x, arg1, arg2); | |
547 | NEXT; | |
548 | } | |
549 | break; | |
550 | } | |
551 | } | |
d507b25f | 552 | #endif |
659b4611 AW |
553 | /* |
554 | * Other interpreted or compiled call | |
a98cef7e | 555 | */ |
3616e9e9 | 556 | if (!SCM_FALSEP (scm_procedure_p (x))) |
a98cef7e | 557 | { |
f41cb00c LC |
558 | /* At this point, the stack contains the procedure and each one of its |
559 | arguments. */ | |
17e90c5e | 560 | POP_LIST (nargs); |
1865ad56 | 561 | SYNC_REGISTER (); |
887ce75a AW |
562 | /* keep args on stack so they are marked */ |
563 | sp[-1] = scm_apply (x, sp[0], SCM_EOL); | |
66db076a | 564 | NULLSTACK_FOR_NONLOCAL_EXIT (); |
887ce75a | 565 | DROP (); |
42906d74 AW |
566 | if (SCM_UNLIKELY (SCM_VALUESP (*sp))) |
567 | { | |
568 | /* truncate values */ | |
569 | SCM values; | |
570 | POP (values); | |
571 | values = scm_struct_ref (values, SCM_INUM0); | |
572 | if (scm_is_null (values)) | |
573 | goto vm_error_not_enough_values; | |
574 | PUSH (SCM_CAR (values)); | |
575 | } | |
17e90c5e | 576 | NEXT; |
a98cef7e KN |
577 | } |
578 | /* | |
579 | * Continuation call | |
580 | */ | |
3616e9e9 | 581 | if (SCM_VM_CONT_P (x)) |
a98cef7e | 582 | { |
fcd4901b | 583 | program = x; |
f03c31db | 584 | vm_call_continuation: |
a98cef7e | 585 | /* Check the number of arguments */ |
f03c31db | 586 | /* FIXME multiple args */ |
382693fe | 587 | if (nargs != 1) |
fcd4901b | 588 | scm_wrong_num_args (program); |
a98cef7e KN |
589 | |
590 | /* Reinstate the continuation */ | |
17e90c5e | 591 | EXIT_HOOK (); |
fcd4901b | 592 | reinstate_vm_cont (vp, program); |
3d5ee0cd | 593 | CACHE_REGISTER (); |
af988bbf | 594 | program = SCM_FRAME_PROGRAM (fp); |
3616e9e9 | 595 | CACHE_PROGRAM (); |
a98cef7e KN |
596 | NEXT; |
597 | } | |
598 | ||
66292535 | 599 | program = x; |
17e90c5e | 600 | goto vm_error_wrong_type_apply; |
a98cef7e KN |
601 | } |
602 | ||
53e28ed9 | 603 | VM_DEFINE_INSTRUCTION (40, goto_args, "goto/args", 1, -1, 1) |
a98cef7e | 604 | { |
f41cb00c | 605 | register SCM x; |
17e90c5e | 606 | nargs = FETCH (); |
f03c31db | 607 | vm_goto_args: |
3616e9e9 | 608 | x = sp[-nargs]; |
17e90c5e | 609 | |
28a2f57b | 610 | SYNC_REGISTER (); |
17e90c5e | 611 | SCM_TICK; /* allow interrupt here */ |
a98cef7e KN |
612 | |
613 | /* | |
17e90c5e | 614 | * Tail recursive call |
a98cef7e | 615 | */ |
17e90c5e | 616 | if (SCM_EQ_P (x, program)) |
a98cef7e | 617 | { |
f21dfea6 | 618 | int i; |
17e90c5e KN |
619 | |
620 | /* Move arguments */ | |
f21dfea6 KN |
621 | INIT_ARGS (); |
622 | sp -= bp->nargs - 1; | |
623 | for (i = 0; i < bp->nargs; i++) | |
624 | LOCAL_SET (i, sp[i]); | |
f41cb00c LC |
625 | |
626 | /* Drop the first argument and the program itself. */ | |
627 | sp -= 2; | |
5e390de6 AW |
628 | NULLSTACK (bp->nargs + 1); |
629 | ||
630 | /* Freshen the externals */ | |
53e28ed9 | 631 | external = SCM_PROGRAM_EXTERNALS (x); |
5e390de6 AW |
632 | for (i = 0; i < bp->nexts; i++) |
633 | CONS (external, SCM_UNDEFINED, external); | |
634 | SCM_FRAME_DATA_ADDRESS (fp)[0] = external; | |
a98cef7e | 635 | |
f21dfea6 | 636 | /* Call itself */ |
17e90c5e | 637 | ip = bp->base; |
17e90c5e | 638 | APPLY_HOOK (); |
a98cef7e KN |
639 | NEXT; |
640 | } | |
28106f54 | 641 | |
17e90c5e | 642 | /* |
28106f54 | 643 | * Tail call, but not to self -- reuse the frame, keeping the ra and dl |
17e90c5e | 644 | */ |
3616e9e9 | 645 | if (SCM_PROGRAM_P (x)) |
17e90c5e | 646 | { |
28106f54 AW |
647 | SCM *data, *tail_args, *dl; |
648 | int i; | |
da320011 | 649 | scm_byte_t *ra, *mvra; |
11ea1aba AW |
650 | #ifdef VM_ENABLE_STACK_NULLING |
651 | SCM *old_sp; | |
652 | #endif | |
28106f54 | 653 | |
17e90c5e | 654 | EXIT_HOOK (); |
28106f54 AW |
655 | |
656 | /* save registers */ | |
657 | tail_args = stack_base + 2; | |
658 | ra = SCM_FRAME_RETURN_ADDRESS (fp); | |
da320011 | 659 | mvra = SCM_FRAME_MV_RETURN_ADDRESS (fp); |
28106f54 AW |
660 | dl = SCM_FRAME_DYNAMIC_LINK (fp); |
661 | ||
662 | /* switch programs */ | |
11ea1aba | 663 | program = x; |
28106f54 AW |
664 | CACHE_PROGRAM (); |
665 | INIT_ARGS (); | |
11ea1aba AW |
666 | /* delay updating the frame so that if INIT_ARGS has to cons up a rest |
667 | arg, going into GC, the stack still makes sense */ | |
668 | fp[-1] = program; | |
28106f54 AW |
669 | nargs = bp->nargs; |
670 | ||
11ea1aba AW |
671 | #ifdef VM_ENABLE_STACK_NULLING |
672 | old_sp = sp; | |
673 | CHECK_STACK_LEAK (); | |
674 | #endif | |
675 | ||
28106f54 AW |
676 | /* new registers -- logically this would be better later, but let's make |
677 | sure we have space for the locals now */ | |
678 | data = SCM_FRAME_DATA_ADDRESS (fp); | |
679 | ip = bp->base; | |
b1b942b7 | 680 | stack_base = data + 3; |
28106f54 AW |
681 | sp = stack_base; |
682 | CHECK_OVERFLOW (); | |
683 | ||
684 | /* copy args, bottom-up */ | |
685 | for (i = 0; i < nargs; i++) | |
686 | fp[i] = tail_args[i]; | |
687 | ||
11ea1aba AW |
688 | NULLSTACK (old_sp - sp); |
689 | ||
28106f54 AW |
690 | /* init locals */ |
691 | for (i = bp->nlocs; i; i--) | |
692 | data[-i] = SCM_UNDEFINED; | |
693 | ||
28106f54 | 694 | /* Set frame data */ |
b1b942b7 AW |
695 | data[3] = (SCM)ra; |
696 | data[2] = (SCM)mvra; | |
697 | data[1] = (SCM)dl; | |
11ea1aba AW |
698 | |
699 | /* Postpone initializing external vars, because if the CONS causes a GC, | |
700 | we want the stack marker to see the data array formatted as expected. */ | |
701 | data[0] = SCM_UNDEFINED; | |
53e28ed9 | 702 | external = SCM_PROGRAM_EXTERNALS (fp[-1]); |
11ea1aba AW |
703 | for (i = 0; i < bp->nexts; i++) |
704 | CONS (external, SCM_UNDEFINED, external); | |
28106f54 | 705 | data[0] = external; |
11ea1aba | 706 | |
28106f54 AW |
707 | ENTER_HOOK (); |
708 | APPLY_HOOK (); | |
709 | NEXT; | |
17e90c5e | 710 | } |
d507b25f AW |
711 | #ifdef ENABLE_TRAMPOLINE |
712 | /* This seems to actually slow down the fibo test -- dunno why */ | |
a98cef7e | 713 | /* |
659b4611 AW |
714 | * Subr call |
715 | */ | |
716 | switch (nargs) | |
717 | { | |
718 | case 0: | |
719 | { | |
720 | scm_t_trampoline_0 call = scm_trampoline_0 (x); | |
721 | if (call) | |
722 | { | |
723 | SYNC_ALL (); | |
724 | *sp = call (x); | |
725 | goto vm_return; | |
726 | } | |
727 | break; | |
728 | } | |
729 | case 1: | |
730 | { | |
731 | scm_t_trampoline_1 call = scm_trampoline_1 (x); | |
732 | if (call) | |
733 | { | |
734 | SCM arg1; | |
735 | POP (arg1); | |
736 | SYNC_ALL (); | |
737 | *sp = call (x, arg1); | |
738 | goto vm_return; | |
739 | } | |
740 | break; | |
741 | } | |
742 | case 2: | |
743 | { | |
744 | scm_t_trampoline_2 call = scm_trampoline_2 (x); | |
745 | if (call) | |
746 | { | |
747 | SCM arg1, arg2; | |
748 | POP (arg2); | |
749 | POP (arg1); | |
750 | SYNC_ALL (); | |
751 | *sp = call (x, arg1, arg2); | |
752 | goto vm_return; | |
753 | } | |
754 | break; | |
755 | } | |
756 | } | |
d507b25f | 757 | #endif |
659b4611 AW |
758 | |
759 | /* | |
760 | * Other interpreted or compiled call | |
a98cef7e | 761 | */ |
3616e9e9 | 762 | if (!SCM_FALSEP (scm_procedure_p (x))) |
a98cef7e | 763 | { |
17e90c5e | 764 | POP_LIST (nargs); |
1865ad56 | 765 | SYNC_REGISTER (); |
887ce75a | 766 | sp[-1] = scm_apply (x, sp[0], SCM_EOL); |
66db076a | 767 | NULLSTACK_FOR_NONLOCAL_EXIT (); |
887ce75a | 768 | DROP (); |
42906d74 AW |
769 | if (SCM_UNLIKELY (SCM_VALUESP (*sp))) |
770 | { | |
771 | /* multiple values returned to continuation */ | |
772 | SCM values; | |
773 | POP (values); | |
774 | values = scm_struct_ref (values, SCM_INUM0); | |
775 | nvalues = scm_ilength (values); | |
fb10a008 | 776 | PUSH_LIST (values, SCM_NULLP); |
42906d74 AW |
777 | goto vm_return_values; |
778 | } | |
a98cef7e KN |
779 | goto vm_return; |
780 | } | |
fcd4901b AW |
781 | |
782 | program = x; | |
783 | ||
a98cef7e KN |
784 | /* |
785 | * Continuation call | |
786 | */ | |
fcd4901b | 787 | if (SCM_VM_CONT_P (program)) |
f03c31db | 788 | goto vm_call_continuation; |
a98cef7e | 789 | |
17e90c5e KN |
790 | goto vm_error_wrong_type_apply; |
791 | } | |
792 | ||
53e28ed9 | 793 | VM_DEFINE_INSTRUCTION (41, goto_nargs, "goto/nargs", 0, 0, 1) |
efbd5892 AW |
794 | { |
795 | SCM x; | |
796 | POP (x); | |
797 | nargs = scm_to_int (x); | |
d51406fe | 798 | /* FIXME: should truncate values? */ |
efbd5892 AW |
799 | goto vm_goto_args; |
800 | } | |
801 | ||
53e28ed9 | 802 | VM_DEFINE_INSTRUCTION (42, call_nargs, "call/nargs", 0, 0, 1) |
efbd5892 AW |
803 | { |
804 | SCM x; | |
805 | POP (x); | |
806 | nargs = scm_to_int (x); | |
d51406fe | 807 | /* FIXME: should truncate values? */ |
efbd5892 AW |
808 | goto vm_call; |
809 | } | |
810 | ||
53e28ed9 | 811 | VM_DEFINE_INSTRUCTION (43, mv_call, "mv-call", 3, -1, 1) |
a222b0fa AW |
812 | { |
813 | SCM x; | |
efbd5892 | 814 | signed short offset; |
a222b0fa AW |
815 | |
816 | nargs = FETCH (); | |
efbd5892 | 817 | FETCH_OFFSET (offset); |
a222b0fa AW |
818 | |
819 | x = sp[-nargs]; | |
820 | ||
821 | /* | |
822 | * Subprogram call | |
823 | */ | |
824 | if (SCM_PROGRAM_P (x)) | |
825 | { | |
826 | program = x; | |
827 | CACHE_PROGRAM (); | |
828 | INIT_ARGS (); | |
829 | NEW_FRAME (); | |
b1b942b7 | 830 | SCM_FRAME_DATA_ADDRESS (fp)[2] = (SCM)(SCM_FRAME_RETURN_ADDRESS (fp) + offset); |
a222b0fa AW |
831 | ENTER_HOOK (); |
832 | APPLY_HOOK (); | |
833 | NEXT; | |
834 | } | |
835 | /* | |
836 | * Other interpreted or compiled call | |
837 | */ | |
838 | if (!SCM_FALSEP (scm_procedure_p (x))) | |
839 | { | |
840 | /* At this point, the stack contains the procedure and each one of its | |
841 | arguments. */ | |
a222b0fa | 842 | POP_LIST (nargs); |
a222b0fa | 843 | SYNC_REGISTER (); |
887ce75a | 844 | sp[-1] = scm_apply (x, sp[0], SCM_EOL); |
66db076a | 845 | NULLSTACK_FOR_NONLOCAL_EXIT (); |
887ce75a | 846 | DROP (); |
a222b0fa AW |
847 | if (SCM_VALUESP (*sp)) |
848 | { | |
849 | SCM values, len; | |
850 | POP (values); | |
851 | values = scm_struct_ref (values, SCM_INUM0); | |
852 | len = scm_length (values); | |
fb10a008 | 853 | PUSH_LIST (values, SCM_NULLP); |
a222b0fa AW |
854 | PUSH (len); |
855 | ip += offset; | |
856 | } | |
857 | NEXT; | |
858 | } | |
859 | /* | |
860 | * Continuation call | |
861 | */ | |
862 | if (SCM_VM_CONT_P (x)) | |
863 | { | |
864 | program = x; | |
865 | goto vm_call_continuation; | |
866 | } | |
867 | ||
868 | program = x; | |
869 | goto vm_error_wrong_type_apply; | |
870 | } | |
871 | ||
53e28ed9 | 872 | VM_DEFINE_INSTRUCTION (44, apply, "apply", 1, -1, 1) |
3616e9e9 | 873 | { |
c8b9df71 KN |
874 | int len; |
875 | SCM ls; | |
876 | POP (ls); | |
877 | ||
878 | nargs = FETCH (); | |
9a8cc8e7 | 879 | ASSERT (nargs >= 2); |
c8b9df71 KN |
880 | |
881 | len = scm_ilength (ls); | |
882 | if (len < 0) | |
883 | goto vm_error_wrong_type_arg; | |
884 | ||
fb10a008 | 885 | PUSH_LIST (ls, SCM_NULL_OR_NIL_P); |
c8b9df71 KN |
886 | |
887 | nargs += len - 2; | |
888 | goto vm_call; | |
3616e9e9 KN |
889 | } |
890 | ||
53e28ed9 | 891 | VM_DEFINE_INSTRUCTION (45, goto_apply, "goto/apply", 1, -1, 1) |
f03c31db AW |
892 | { |
893 | int len; | |
894 | SCM ls; | |
895 | POP (ls); | |
896 | ||
897 | nargs = FETCH (); | |
9a8cc8e7 | 898 | ASSERT (nargs >= 2); |
f03c31db AW |
899 | |
900 | len = scm_ilength (ls); | |
901 | if (len < 0) | |
902 | goto vm_error_wrong_type_arg; | |
903 | ||
fb10a008 | 904 | PUSH_LIST (ls, SCM_NULL_OR_NIL_P); |
f03c31db AW |
905 | |
906 | nargs += len - 2; | |
907 | goto vm_goto_args; | |
908 | } | |
909 | ||
53e28ed9 | 910 | VM_DEFINE_INSTRUCTION (46, call_cc, "call/cc", 0, 1, 1) |
17e90c5e | 911 | { |
76282387 AW |
912 | int first; |
913 | SCM proc, cont; | |
914 | POP (proc); | |
915 | SYNC_ALL (); | |
916 | cont = scm_make_continuation (&first); | |
917 | if (first) | |
918 | { | |
919 | PUSH (proc); | |
920 | PUSH (cont); | |
921 | nargs = 1; | |
922 | goto vm_call; | |
923 | } | |
11ea1aba AW |
924 | ASSERT (sp == vp->sp); |
925 | ASSERT (fp == vp->fp); | |
76282387 AW |
926 | else if (SCM_VALUESP (cont)) |
927 | { | |
928 | /* multiple values returned to continuation */ | |
929 | SCM values; | |
930 | values = scm_struct_ref (cont, SCM_INUM0); | |
931 | if (SCM_NULLP (values)) | |
9a8cc8e7 | 932 | goto vm_error_no_values; |
76282387 AW |
933 | /* non-tail context does not accept multiple values? */ |
934 | PUSH (SCM_CAR (values)); | |
935 | NEXT; | |
936 | } | |
937 | else | |
938 | { | |
939 | PUSH (cont); | |
940 | NEXT; | |
941 | } | |
a98cef7e KN |
942 | } |
943 | ||
53e28ed9 | 944 | VM_DEFINE_INSTRUCTION (47, goto_cc, "goto/cc", 0, 1, 1) |
f03c31db | 945 | { |
76282387 AW |
946 | int first; |
947 | SCM proc, cont; | |
948 | POP (proc); | |
949 | SYNC_ALL (); | |
950 | cont = scm_make_continuation (&first); | |
66db076a AW |
951 | ASSERT (sp == vp->sp); |
952 | ASSERT (fp == vp->fp); | |
76282387 AW |
953 | if (first) |
954 | { | |
955 | PUSH (proc); | |
956 | PUSH (cont); | |
957 | nargs = 1; | |
958 | goto vm_goto_args; | |
959 | } | |
960 | else if (SCM_VALUESP (cont)) | |
961 | { | |
962 | /* multiple values returned to continuation */ | |
963 | SCM values; | |
964 | values = scm_struct_ref (cont, SCM_INUM0); | |
965 | nvalues = scm_ilength (values); | |
fb10a008 | 966 | PUSH_LIST (values, SCM_NULLP); |
76282387 AW |
967 | goto vm_return_values; |
968 | } | |
969 | else | |
970 | { | |
971 | PUSH (cont); | |
972 | goto vm_return; | |
973 | } | |
f03c31db AW |
974 | } |
975 | ||
53e28ed9 | 976 | VM_DEFINE_INSTRUCTION (48, return, "return", 0, 0, 1) |
a98cef7e | 977 | { |
a98cef7e | 978 | vm_return: |
17e90c5e KN |
979 | EXIT_HOOK (); |
980 | RETURN_HOOK (); | |
ef7e1868 AW |
981 | SYNC_REGISTER (); |
982 | SCM_TICK; /* allow interrupt here */ | |
f13c269b AW |
983 | { |
984 | SCM ret, *data; | |
985 | data = SCM_FRAME_DATA_ADDRESS (fp); | |
986 | ||
987 | POP (ret); | |
11ea1aba | 988 | ASSERT (sp == stack_base); |
b1b942b7 | 989 | ASSERT (stack_base == data + 3); |
f13c269b AW |
990 | |
991 | /* Restore registers */ | |
992 | sp = SCM_FRAME_LOWER_ADDRESS (fp); | |
b1b942b7 AW |
993 | ip = SCM_FRAME_BYTE_CAST (data[3]); |
994 | fp = SCM_FRAME_STACK_CAST (data[1]); | |
11ea1aba AW |
995 | { |
996 | #ifdef VM_ENABLE_STACK_NULLING | |
997 | int nullcount = stack_base - sp; | |
998 | #endif | |
999 | stack_base = SCM_FRAME_UPPER_ADDRESS (fp) - 1; | |
1000 | NULLSTACK (nullcount); | |
1001 | } | |
f13c269b AW |
1002 | |
1003 | /* Set return value (sp is already pushed) */ | |
1004 | *sp = ret; | |
1005 | } | |
17e90c5e | 1006 | |
15df3447 | 1007 | /* Restore the last program */ |
af988bbf | 1008 | program = SCM_FRAME_PROGRAM (fp); |
499a4c07 | 1009 | CACHE_PROGRAM (); |
af988bbf | 1010 | CACHE_EXTERNAL (); |
7e4760e4 | 1011 | CHECK_IP (); |
a98cef7e KN |
1012 | NEXT; |
1013 | } | |
17e90c5e | 1014 | |
53e28ed9 | 1015 | VM_DEFINE_INSTRUCTION (49, return_values, "return/values", 1, -1, -1) |
a222b0fa | 1016 | { |
ef24c01b AW |
1017 | /* nvalues declared at top level, because for some reason gcc seems to think |
1018 | that perhaps it might be used without declaration. Fooey to that, I say. */ | |
1019 | SCM *data; | |
1020 | ||
1021 | nvalues = FETCH (); | |
1022 | vm_return_values: | |
a222b0fa AW |
1023 | EXIT_HOOK (); |
1024 | RETURN_HOOK (); | |
ef24c01b AW |
1025 | |
1026 | data = SCM_FRAME_DATA_ADDRESS (fp); | |
b1b942b7 | 1027 | ASSERT (stack_base == data + 3); |
a222b0fa | 1028 | |
b1b942b7 AW |
1029 | /* data[2] is the mv return address */ |
1030 | if (nvalues != 1 && data[2]) | |
ef24c01b AW |
1031 | { |
1032 | int i; | |
1033 | /* Restore registers */ | |
1034 | sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1; | |
b1b942b7 AW |
1035 | ip = SCM_FRAME_BYTE_CAST (data[2]); /* multiple value ra */ |
1036 | fp = SCM_FRAME_STACK_CAST (data[1]); | |
a222b0fa | 1037 | |
ef24c01b AW |
1038 | /* Push return values, and the number of values */ |
1039 | for (i = 0; i < nvalues; i++) | |
1040 | *++sp = stack_base[1+i]; | |
1041 | *++sp = SCM_I_MAKINUM (nvalues); | |
a222b0fa | 1042 | |
ef24c01b | 1043 | /* Finally set new stack_base */ |
11ea1aba | 1044 | NULLSTACK (stack_base - sp + nvalues + 1); |
ef24c01b AW |
1045 | stack_base = SCM_FRAME_UPPER_ADDRESS (fp) - 1; |
1046 | } | |
1047 | else if (nvalues >= 1) | |
1048 | { | |
1049 | /* Multiple values for a single-valued continuation -- here's where I | |
1050 | break with guile tradition and try and do something sensible. (Also, | |
1051 | this block handles the single-valued return to an mv | |
1052 | continuation.) */ | |
1053 | /* Restore registers */ | |
1054 | sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1; | |
b1b942b7 AW |
1055 | ip = SCM_FRAME_BYTE_CAST (data[3]); /* single value ra */ |
1056 | fp = SCM_FRAME_STACK_CAST (data[1]); | |
a222b0fa | 1057 | |
ef24c01b AW |
1058 | /* Push first value */ |
1059 | *++sp = stack_base[1]; | |
a222b0fa | 1060 | |
ef24c01b | 1061 | /* Finally set new stack_base */ |
9b10d0bc | 1062 | NULLSTACK (stack_base - sp + nvalues + 1); |
ef24c01b AW |
1063 | stack_base = SCM_FRAME_UPPER_ADDRESS (fp) - 1; |
1064 | } | |
1065 | else | |
1066 | goto vm_error_no_values; | |
a222b0fa AW |
1067 | |
1068 | /* Restore the last program */ | |
1069 | program = SCM_FRAME_PROGRAM (fp); | |
1070 | CACHE_PROGRAM (); | |
1071 | CACHE_EXTERNAL (); | |
1072 | CHECK_IP (); | |
1073 | NEXT; | |
1074 | } | |
1075 | ||
53e28ed9 | 1076 | VM_DEFINE_INSTRUCTION (50, return_values_star, "return/values*", 1, -1, -1) |
ef24c01b AW |
1077 | { |
1078 | SCM l; | |
1079 | ||
1080 | nvalues = FETCH (); | |
11ea1aba | 1081 | ASSERT (nvalues >= 1); |
ef24c01b AW |
1082 | |
1083 | nvalues--; | |
1084 | POP (l); | |
1085 | while (SCM_CONSP (l)) | |
1086 | { | |
1087 | PUSH (SCM_CAR (l)); | |
1088 | l = SCM_CDR (l); | |
1089 | nvalues++; | |
1090 | } | |
fb10a008 AW |
1091 | if (SCM_UNLIKELY (!SCM_NULL_OR_NIL_P (l))) { |
1092 | err_args = scm_list_1 (l); | |
1093 | goto vm_error_improper_list; | |
1094 | } | |
ef24c01b AW |
1095 | |
1096 | goto vm_return_values; | |
1097 | } | |
1098 | ||
53e28ed9 | 1099 | VM_DEFINE_INSTRUCTION (51, truncate_values, "truncate-values", 2, -1, -1) |
d51406fe AW |
1100 | { |
1101 | SCM x; | |
1102 | int nbinds, rest; | |
1103 | POP (x); | |
1104 | nvalues = scm_to_int (x); | |
1105 | nbinds = FETCH (); | |
1106 | rest = FETCH (); | |
1107 | ||
1108 | if (rest) | |
1109 | nbinds--; | |
1110 | ||
1111 | if (nvalues < nbinds) | |
1112 | goto vm_error_not_enough_values; | |
1113 | ||
1114 | if (rest) | |
1115 | POP_LIST (nvalues - nbinds); | |
1116 | else | |
1117 | DROPN (nvalues - nbinds); | |
1118 | ||
1119 | NEXT; | |
1120 | } | |
1121 | ||
53e28ed9 AW |
1122 | /* |
1123 | (defun renumber-ops () | |
1124 | "start from top of buffer and renumber 'VM_DEFINE_FOO (\n' sequences" | |
1125 | (interactive "") | |
1126 | (save-excursion | |
1127 | (let ((counter -1)) (goto-char (point-min)) | |
1128 | (while (re-search-forward "^VM_DEFINE_[^ ]+ (\\([^,]+\\)," (point-max) t) | |
1129 | (replace-match | |
1130 | (number-to-string (setq counter (1+ counter))) | |
1131 | t t nil 1))))) | |
1132 | */ | |
17e90c5e KN |
1133 | /* |
1134 | Local Variables: | |
1135 | c-file-style: "gnu" | |
1136 | End: | |
1137 | */ |