summaryrefslogtreecommitdiff
path: root/insns.def
blob: c6b50647945051d90dbbe0ab2e7ba26c706ec822 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
/* -*- mode:c; style:ruby; coding: utf-8 -*-
  insns.def - YARV instruction definitions

  $Author: $
  created at: 04/01/01 01:17:55 JST

  Copyright (C) 2004-2007 Koichi Sasada
  Massive rewrite by @shyouhei in 2017.
 */

/* Some comments about this file's contents:

   - The new format aims to be editable by C editor of your choice;
     your mileage might vary of course.

   - Each instructions are in following format:

     DEFINE_INSN
     instruction_name
     (type operand, type operand, ..)
     (pop_values, ..)
     (return values ..)
     // attr type name contents..
     {
       .. // insn body
     }

   - Unlike the old format which was line-oriented, you can now place
     newlines and comments at liberal positions.

   - `DEFINE_INSN` is a keyword.

   - An instruction name must be a valid C identifier.

   - Operands, pop values, return values are series of either variable
     declarations, keyword `void`, or keyword `...`.  They are much
     like C function declarations.

   - Attribute pragmas are optional, and can include arbitrary C
     expressions.  You can write anything there but as of writing,
     supported attributes are:

       * sp_inc: Used to dynamically calculate sp increase in
         `insn_stack_increase`.

       * handles_sp: If it is true, VM deals with sp in the insn.

       * leaf: indicates that the instruction is "leaf" i.e. it does
         not introduce new stack frame on top of it.  Default true.

   - Attributes can access operands, but not stack (push/pop) variables.

   - An instruction's body is a pure C block, copied verbatimly into
     the generated C source code.
 */

/* nop */
DEFINE_INSN
nop
()
()
()
{
    /* none */
}

/**********************************************************/
/* deal with variables                                    */
/**********************************************************/

/* Get local variable (pointed by `idx' and `level').
     'level' indicates the nesting depth from the current block.
 */
DEFINE_INSN
getlocal
(lindex_t idx, rb_num_t level)
()
(VALUE val)
{
    val = *(vm_get_ep(GET_EP(), level) - idx);
    RB_DEBUG_COUNTER_INC(lvar_get);
    (void)RB_DEBUG_COUNTER_INC_IF(lvar_get_dynamic, level > 0);
}

/* Set a local variable (pointed to by 'idx') as val.
     'level' indicates the nesting depth from the current block.
 */
DEFINE_INSN
setlocal
(lindex_t idx, rb_num_t level)
(VALUE val)
()
{
    vm_env_write(vm_get_ep(GET_EP(), level), -(int)idx, val);
    RB_DEBUG_COUNTER_INC(lvar_set);
    (void)RB_DEBUG_COUNTER_INC_IF(lvar_set_dynamic, level > 0);
}

/* Get a block parameter. */
DEFINE_INSN
getblockparam
(lindex_t idx, rb_num_t level)
()
(VALUE val)
{
    const VALUE *ep = vm_get_ep(GET_EP(), level);
    VM_ASSERT(VM_ENV_LOCAL_P(ep));

    if (!VM_ENV_FLAGS(ep, VM_FRAME_FLAG_MODIFIED_BLOCK_PARAM)) {
	val = rb_vm_bh_to_procval(ec, VM_ENV_BLOCK_HANDLER(ep));
	vm_env_write(ep, -(int)idx, val);
	VM_ENV_FLAGS_SET(ep, VM_FRAME_FLAG_MODIFIED_BLOCK_PARAM);
    }
    else {
	val = *(ep - idx);
	RB_DEBUG_COUNTER_INC(lvar_get);
	(void)RB_DEBUG_COUNTER_INC_IF(lvar_get_dynamic, level > 0);
    }
}

/* Set block parameter. */
DEFINE_INSN
setblockparam
(lindex_t idx, rb_num_t level)
(VALUE val)
()
{
    const VALUE *ep = vm_get_ep(GET_EP(), level);
    VM_ASSERT(VM_ENV_LOCAL_P(ep));

    vm_env_write(ep, -(int)idx, val);
    RB_DEBUG_COUNTER_INC(lvar_set);
    (void)RB_DEBUG_COUNTER_INC_IF(lvar_set_dynamic, level > 0);

    VM_ENV_FLAGS_SET(ep, VM_FRAME_FLAG_MODIFIED_BLOCK_PARAM);
}

/* Get special proxy object which only responds to `call` method if the block parameter
     represents a iseq/ifunc block. Otherwise, same as `getblockparam`.
 */
DEFINE_INSN
getblockparamproxy
(lindex_t idx, rb_num_t level)
()
(VALUE val)
{
    const VALUE *ep = vm_get_ep(GET_EP(), level);
    VM_ASSERT(VM_ENV_LOCAL_P(ep));

    if (!VM_ENV_FLAGS(ep, VM_FRAME_FLAG_MODIFIED_BLOCK_PARAM)) {
	VALUE block_handler = VM_ENV_BLOCK_HANDLER(ep);

	if (block_handler) {
	    switch (vm_block_handler_type(block_handler)) {
	      case block_handler_type_iseq:
	      case block_handler_type_ifunc:
		val = rb_block_param_proxy;
		break;
	      case block_handler_type_symbol:
		val = rb_sym_to_proc(VM_BH_TO_SYMBOL(block_handler));
		goto INSN_LABEL(set);
	      case block_handler_type_proc:
		val = VM_BH_TO_PROC(block_handler);
		goto INSN_LABEL(set);
	      default:
		VM_UNREACHABLE(getblockparamproxy);
	    }
	}
	else {
	    val = Qnil;
	  INSN_LABEL(set):
	    vm_env_write(ep, -(int)idx, val);
	    VM_ENV_FLAGS_SET(ep, VM_FRAME_FLAG_MODIFIED_BLOCK_PARAM);
	}
    }
    else {
	val = *(ep - idx);
	RB_DEBUG_COUNTER_INC(lvar_get);
	(void)RB_DEBUG_COUNTER_INC_IF(lvar_get_dynamic, level > 0);
    }
}

/* Get value of special local variable ($~, $_, ..). */
DEFINE_INSN
getspecial
(rb_num_t key, rb_num_t type)
()
(VALUE val)
{
    val = vm_getspecial(ec, GET_LEP(), key, type);
}

/* Set value of special local variable ($~, $_, ...) to obj. */
DEFINE_INSN
setspecial
(rb_num_t key)
(VALUE obj)
()
{
    lep_svar_set(ec, GET_LEP(), key, obj);
}

/* Get value of instance variable id of self. */
DEFINE_INSN
getinstancevariable
(ID id, IC ic)
()
(VALUE val)
/* "instance variable not initialized" warning can be hooked. */
// attr bool leaf = false; /* has rb_warning() */
{
    val = vm_getinstancevariable(GET_SELF(), id, ic);
}

/* Set value of instance variable id of self to val. */
DEFINE_INSN
setinstancevariable
(ID id, IC ic)
(VALUE val)
()
{
    vm_setinstancevariable(GET_SELF(), id, val, ic);
}

/* Get value of class variable id of klass as val. */
DEFINE_INSN
getclassvariable
(ID id)
()
(VALUE val)
/* "class variable access from toplevel" warning can be hooked. */
// attr bool leaf = false; /* has rb_warning() */
{
    val = rb_cvar_get(vm_get_cvar_base(rb_vm_get_cref(GET_EP()), GET_CFP()), id);
}

/* Set value of class variable id of klass as val. */
DEFINE_INSN
setclassvariable
(ID id)
(VALUE val)
()
/* "class variable access from toplevel" warning can be hooked. */
// attr bool leaf = false; /* has rb_warning() */
{
    vm_ensure_not_refinement_module(GET_SELF());
    rb_cvar_set(vm_get_cvar_base(rb_vm_get_cref(GET_EP()), GET_CFP()), id, val);
}

/* Get constant variable id. If klass is Qnil, constants
   are searched in the current scope. Otherwise, get constant under klass
   class or module.
 */
DEFINE_INSN
getconstant
(ID id)
(VALUE klass)
(VALUE val)
/* getconstant can kick autoload */
// attr bool leaf = false; /* has rb_autoload_load() */
{
    val = vm_get_ev_const(ec, klass, id, 0);
}

/* Set constant variable id under cbase class or module.
 */
DEFINE_INSN
setconstant
(ID id)
(VALUE val, VALUE cbase)
()
/* Assigning an object to a constant is basically a leaf operation.
 * The problem is, assigning a Module instance to a constant _names_
 * that module.  Naming involves string manipulations, which are
 * method calls. */
// attr bool leaf = false; /* has StringValue() */
{
    vm_check_if_namespace(cbase);
    vm_ensure_not_refinement_module(GET_SELF());
    rb_const_set(cbase, id, val);
}

/* get global variable id. */
DEFINE_INSN
getglobal
(GENTRY entry)
()
(VALUE val)
// attr bool leaf = leafness_of_getglobal(entry);
{
    val = GET_GLOBAL((VALUE)entry);
}

/* set global variable id as val. */
DEFINE_INSN
setglobal
(GENTRY entry)
(VALUE val)
()
// attr bool leaf = leafness_of_setglobal(entry);
{
    SET_GLOBAL((VALUE)entry, val);
}

/**********************************************************/
/* deal with values                                       */
/**********************************************************/

/* put nil to stack. */
DEFINE_INSN
putnil
()
()
(VALUE val)
{
    val = Qnil;
}

/* put self. */
DEFINE_INSN
putself
()
()
(VALUE val)
{
    val = GET_SELF();
}

/* put some object.
     i.e. Fixnum, true, false, nil, and so on.
 */
DEFINE_INSN
putobject
(VALUE val)
()
(VALUE val)
{
    /* */
}

/* put special object.  "value_type" is for expansion. */
DEFINE_INSN
putspecialobject
(rb_num_t value_type)
()
(VALUE val)
{
    enum vm_special_object_type type;

    type = (enum vm_special_object_type)value_type;
    val = vm_get_special_object(GET_EP(), type);
}

/* put iseq value. */
DEFINE_INSN
putiseq
(ISEQ iseq)
()
(VALUE ret)
// attr bool leaf = true; /* yes it is */
{
    ret = (VALUE)iseq;
}

/* put string val. string will be copied. */
DEFINE_INSN
putstring
(VALUE str)
()
(VALUE val)
{
    val = rb_str_resurrect(str);
}

/* put concatenate strings */
DEFINE_INSN
concatstrings
(rb_num_t num)
(...)
(VALUE val)
// attr rb_snum_t sp_inc = 1 - num;
{
    val = rb_str_concat_literals(num, STACK_ADDR_FROM_TOP(num));
}

/* push the result of to_s. */
DEFINE_INSN
tostring
()
(VALUE val, VALUE str)
(VALUE val)
{
    val = rb_obj_as_string_result(str, val);
}

/* Freeze (dynamically) created strings. if debug_info is given, set it. */
DEFINE_INSN
freezestring
(VALUE debug_info)
(VALUE str)
(VALUE str)
{
    vm_freezestring(str, debug_info);
}

/* compile str to Regexp and push it.
     opt is the option for the Regexp.
 */
DEFINE_INSN
toregexp
(rb_num_t opt, rb_num_t cnt)
(...)
(VALUE val)
/* This instruction has StringValue(), which is a method call.  But it
 * seems that path is never covered. */
// attr bool leaf = true; /* yes it is */
// attr rb_snum_t sp_inc = 1 - cnt;
{
    const VALUE ary = rb_ary_tmp_new_from_values(0, cnt, STACK_ADDR_FROM_TOP(cnt));
    val = rb_reg_new_ary(ary, (int)opt);
    rb_ary_clear(ary);
}

/* intern str to Symbol and push it. */
DEFINE_INSN
intern
()
(VALUE str)
(VALUE sym)
{
    sym = rb_str_intern(str);
}

/* put new array initialized with num values on the stack. */
DEFINE_INSN
newarray
(rb_num_t num)
(...)
(VALUE val)
// attr rb_snum_t sp_inc = 1 - num;
{
    val = rb_ary_new4(num, STACK_ADDR_FROM_TOP(num));
}

/* dup array */
DEFINE_INSN
duparray
(VALUE ary)
()
(VALUE val)
{
    val = rb_ary_resurrect(ary);
}

/* if TOS is an array expand, expand it to num objects.
     if the number of the array is less than num, push nils to fill.
     if it is greater than num, exceeding elements are dropped.
     unless TOS is an array, push num - 1 nils.
     if flags is non-zero, push the array of the rest elements.
     flag: 0x01 - rest args array
     flag: 0x02 - for postarg
     flag: 0x04 - reverse?
 */
DEFINE_INSN
expandarray
(rb_num_t num, rb_num_t flag)
(..., VALUE ary)
(...)
// attr bool leaf = false; /* has rb_check_array_type() */
// attr rb_snum_t sp_inc = num - 1 + (flag & 1 ? 1 : 0);
{
    vm_expandarray(GET_SP(), ary, num, (int)flag);
}

/* concat two arrays */
DEFINE_INSN
concatarray
()
(VALUE ary1, VALUE ary2)
(VALUE ary)
// attr bool leaf = false; /* has rb_check_array_type() */
{
    ary = vm_concat_array(ary1, ary2);
}

/* call to_a on array ary to splat */
DEFINE_INSN
splatarray
(VALUE flag)
(VALUE ary)
(VALUE obj)
// attr bool leaf = false; /* has rb_check_array_type() */
{
    obj = vm_splat_array(flag, ary);
}

/* put new Hash from n elements. n must be an even number. */
DEFINE_INSN
newhash
(rb_num_t num)
(...)
(VALUE val)
// attr bool leaf = false; /* has rb_hash_key_str() */
// attr rb_snum_t sp_inc = 1 - num;
{
    RUBY_DTRACE_CREATE_HOOK(HASH, num);

    val = rb_hash_new_with_size(num / 2);

    if (num) {
        rb_hash_bulk_insert(num, STACK_ADDR_FROM_TOP(num), val);
    }
}

/* make new Hash object from (frozen) Array object */
DEFINE_INSN
newhashfromarray
(rb_num_t num, VALUE ary)
()
(VALUE hash)
{
    VM_ASSERT(num * 2 == RARRAY_LEN(ary));
    hash = rb_hash_new_with_size(num);
    rb_hash_bulk_insert(num * 2, RARRAY_CONST_PTR(ary), hash);
}

/* put new Range object.(Range.new(low, high, flag)) */
DEFINE_INSN
newrange
(rb_num_t flag)
(VALUE low, VALUE high)
(VALUE val)
/* rb_range_new() exercises "bad value for range" check. */
// attr bool leaf = false; /* see also: range.c:range_init() */
{
    val = rb_range_new(low, high, (int)flag);
}

/**********************************************************/
/* deal with stack operation                              */
/**********************************************************/

/* pop from stack. */
DEFINE_INSN
pop
()
(VALUE val)
()
{
    (void)val;
    /* none */
}

/* duplicate stack top. */
DEFINE_INSN
dup
()
(VALUE val)
(VALUE val1, VALUE val2)
{
    val1 = val2 = val;
}

/* duplicate stack top n elements */
DEFINE_INSN
dupn
(rb_num_t n)
(...)
(...)
// attr rb_snum_t sp_inc = n;
{
    void *dst = GET_SP();
    void *src = STACK_ADDR_FROM_TOP(n);

    MEMCPY(dst, src, VALUE, n);
}

/* swap top 2 vals */
DEFINE_INSN
swap
()
(VALUE val, VALUE obj)
(VALUE obj, VALUE val)
{
    /* none */
}

/* reverse stack top N order. */
DEFINE_INSN
reverse
(rb_num_t n)
(...)
(...)
// attr rb_snum_t sp_inc = 0;
{
    rb_num_t i;
    VALUE *sp = STACK_ADDR_FROM_TOP(n);

    for (i=0; i<n/2; i++) {
	VALUE v0 = sp[i];
	VALUE v1 = TOPN(i);
	sp[i] = v1;
	TOPN(i) = v0;
    }
}

/* for stack caching. */
DEFINE_INSN
reput
()
(..., VALUE val)
(VALUE val)
// attr rb_snum_t sp_inc = 0;
{
    /* none */
}

/* get nth stack value from stack top */
DEFINE_INSN
topn
(rb_num_t n)
(...)
(VALUE val)
// attr rb_snum_t sp_inc = 1;
{
    val = TOPN(n);
}

/* set Nth stack entry to stack top */
DEFINE_INSN
setn
(rb_num_t n)
(..., VALUE val)
(VALUE val)
// attr rb_snum_t sp_inc = 0;
{
    TOPN(n) = val;
}

/* empty current stack */
DEFINE_INSN
adjuststack
(rb_num_t n)
(...)
(...)
// attr rb_snum_t sp_inc = -(rb_snum_t)n;
{
    /* none */
}

/**********************************************************/
/* deal with setting                                      */
/**********************************************************/

/* defined? */
DEFINE_INSN
defined
(rb_num_t op_type, VALUE obj, VALUE needstr)
(VALUE v)
(VALUE val)
// attr bool leaf = leafness_of_defined(op_type);
{
    val = vm_defined(ec, GET_CFP(), op_type, obj, needstr, v);
}

/* check `target' matches `pattern'.
     `flag & VM_CHECKMATCH_TYPE_MASK' describe how to check pattern.
      VM_CHECKMATCH_TYPE_WHEN: ignore target and check pattern is truthy.
      VM_CHECKMATCH_TYPE_CASE: check `patten === target'.
      VM_CHECKMATCH_TYPE_RESCUE: check `pattern.kind_op?(Module) && pattern === target'.
     if `flag & VM_CHECKMATCH_ARRAY' is not 0, then `patten' is array of patterns.
 */
DEFINE_INSN
checkmatch
(rb_num_t flag)
(VALUE target, VALUE pattern)
(VALUE result)
// attr bool leaf = leafness_of_checkmatch(flag);
{
    result = vm_check_match(ec, target, pattern, flag);
}

/* check keywords are specified or not. */
DEFINE_INSN
checkkeyword
(lindex_t kw_bits_index, lindex_t keyword_index)
()
(VALUE ret)
{
    ret = vm_check_keyword(kw_bits_index, keyword_index, GET_EP());
}

/* check if val is type. */
DEFINE_INSN
checktype
(rb_num_t type)
(VALUE val)
(VALUE ret)
{
    ret = (TYPE(val) == (int)type) ? Qtrue : Qfalse;
}

/**********************************************************/
/* deal with control flow 1: class/module                 */
/**********************************************************/

/* enter class definition scope. if super is Qfalse, and class
   "klass" is defined, it's redefine. otherwise, define "klass" class.
 */
DEFINE_INSN
defineclass
(ID id, ISEQ class_iseq, rb_num_t flags)
(VALUE cbase, VALUE super)
(VALUE val)
// attr bool handles_sp = true;
{
    VALUE klass = vm_find_or_create_class_by_id(id, flags, cbase, super);

    rb_iseq_check(class_iseq);

    /* enter scope */
    vm_push_frame(ec, class_iseq, VM_FRAME_MAGIC_CLASS | VM_ENV_FLAG_LOCAL, klass,
		  GET_BLOCK_HANDLER(),
		  (VALUE)vm_cref_push(ec, klass, NULL, FALSE),
		  class_iseq->body->iseq_encoded, GET_SP(),
		  class_iseq->body->local_table_size,
		  class_iseq->body->stack_max);
    RESTORE_REGS();
    NEXT_INSN();
}

/**********************************************************/
/* deal with control flow 2: method/iterator              */
/**********************************************************/

/* invoke method. */
DEFINE_INSN
send
(CALL_INFO ci, CALL_CACHE cc, ISEQ blockiseq)
(...)
(VALUE val)
// attr bool handles_sp = true;
// attr rb_snum_t sp_inc = - (int)(ci->orig_argc + ((ci->flag & VM_CALL_ARGS_BLOCKARG) ? 1 : 0));
{
    struct rb_calling_info calling;

    calling.block_handler = vm_caller_setup_arg_block(ec, reg_cfp, ci, blockiseq, FALSE);
    calling.recv = TOPN(calling.argc = ci->orig_argc);
    vm_search_method(ci, cc, calling.recv);
    CALL_METHOD(&calling, ci, cc);
}

/* Invoke method without block */
DEFINE_INSN
opt_send_without_block
(CALL_INFO ci, CALL_CACHE cc)
(...)
(VALUE val)
// attr bool leaf = false; /* Of course it isn't. */
// attr bool handles_sp = true;
// attr rb_snum_t sp_inc = -ci->orig_argc;
{
    struct rb_calling_info calling;
    calling.block_handler = VM_BLOCK_HANDLER_NONE;
    vm_search_method(ci, cc, calling.recv = TOPN(calling.argc = ci->orig_argc));
    CALL_METHOD(&calling, ci, cc);
}

DEFINE_INSN
opt_str_freeze
(VALUE str, CALL_INFO ci, CALL_CACHE cc)
()
(VALUE val)
{
    val = vm_opt_str_freeze(str, BOP_FREEZE, idFreeze);

    if (val == Qundef) {
        PUSH(rb_str_resurrect(str));
        CALL_SIMPLE_METHOD();
    }
}

DEFINE_INSN
opt_str_uminus
(VALUE str, CALL_INFO ci, CALL_CACHE cc)
()
(VALUE val)
{
    val = vm_opt_str_freeze(str, BOP_UMINUS, idUMinus);

    if (val == Qundef) {
        PUSH(rb_str_resurrect(str));
        CALL_SIMPLE_METHOD();
    }
}

DEFINE_INSN
opt_newarray_max
(rb_num_t num)
(...)
(VALUE val)
/* This instruction typically has no funcalls.  But it compares array
 * contents each other by nature.  That part could call methods when
 * necessary.  No way to detect such method calls beforehand.  We
 * cannot but mark it being not leaf. */
// attr bool leaf = false; /* has rb_funcall() */
// attr rb_snum_t sp_inc = 1 - num;
{
    val = vm_opt_newarray_max(num, STACK_ADDR_FROM_TOP(num));
}

DEFINE_INSN
opt_newarray_min
(rb_num_t num)
(...)
(VALUE val)
/* Same discussion as opt_newarray_max. */
// attr bool leaf = false; /* has rb_funcall() */
// attr rb_snum_t sp_inc = 1 - num;
{
    val = vm_opt_newarray_min(num, STACK_ADDR_FROM_TOP(num));
}

/* super(args) # args.size => num */
DEFINE_INSN
invokesuper
(CALL_INFO ci, CALL_CACHE cc, ISEQ blockiseq)
(...)
(VALUE val)
// attr bool handles_sp = true;
// attr rb_snum_t sp_inc = - (int)(ci->orig_argc + ((ci->flag & VM_CALL_ARGS_BLOCKARG) ? 1 : 0));
{
    struct rb_calling_info calling;

    calling.block_handler = vm_caller_setup_arg_block(ec, reg_cfp, ci, blockiseq, TRUE);
    calling.recv = TOPN(calling.argc = ci->orig_argc);
    vm_search_super_method(ec, GET_CFP(), &calling, ci, cc);
    CALL_METHOD(&calling, ci, cc);
}

/* yield(args) */
DEFINE_INSN
invokeblock
(CALL_INFO ci)
(...)
(VALUE val)
// attr bool leaf = false; /* Of course it isn't. */
// attr bool handles_sp = true;
// attr rb_snum_t sp_inc = 1 - ci->orig_argc;
{
    struct rb_calling_info calling;
    VALUE block_handler;

    calling.argc = ci->orig_argc;
    calling.block_handler = VM_BLOCK_HANDLER_NONE;
    calling.recv = Qundef; /* should not be used */

    block_handler = VM_CF_BLOCK_HANDLER(GET_CFP());
    if (block_handler == VM_BLOCK_HANDLER_NONE) {
	rb_vm_localjump_error("no block given (yield)", Qnil, 0);
    }

    val = vm_invoke_block(ec, GET_CFP(), &calling, ci, block_handler);
    if (val == Qundef) {
        EXEC_EC_CFP(val);
    }
}

/* return from this scope. */
DEFINE_INSN
leave
()
(VALUE val)
(VALUE val)
/* This is super surprising but when leaving from a frame, we check
 * for interrupts.  If any, that should be executed on top of the
 * current execution context.  This is a method call. */
// attr bool leaf = false; /* has rb_threadptr_execute_interrupts() */
// attr bool handles_sp = true;
{
    if (OPT_CHECKED_RUN) {
	const VALUE *const bp = vm_base_ptr(reg_cfp);
	if (reg_cfp->sp != bp) {
	    vm_stack_consistency_error(ec, reg_cfp, bp);
	}
    }

    RUBY_VM_CHECK_INTS(ec);

    if (vm_pop_frame(ec, GET_CFP(), GET_EP())) {
#if OPT_CALL_THREADED_CODE
	rb_ec_thread_ptr(ec)->retval = val;
	return 0;
#else
	return val;
#endif
    }
    else {
	RESTORE_REGS();
    }
}

/**********************************************************/
/* deal with control flow 3: exception                    */
/**********************************************************/

/* longjump */
DEFINE_INSN
throw
(rb_num_t throw_state)
(VALUE throwobj)
(VALUE val)
/* Same discussion as leave. */
// attr bool leaf = false; /* has rb_threadptr_execute_interrupts() */
{
    RUBY_VM_CHECK_INTS(ec);
    val = vm_throw(ec, GET_CFP(), throw_state, throwobj);
    THROW_EXCEPTION(val);
    /* unreachable */
}

/**********************************************************/
/* deal with control flow 4: local jump                   */
/**********************************************************/

/* set PC to (PC + dst). */
DEFINE_INSN
jump
(OFFSET dst)
()
()
/* Same discussion as leave. */
// attr bool leaf = false; /* has rb_threadptr_execute_interrupts() */
{
    RUBY_VM_CHECK_INTS(ec);
    JUMP(dst);
}

/* if val is not false or nil, set PC to (PC + dst). */
DEFINE_INSN
branchif
(OFFSET dst)
(VALUE val)
()
/* Same discussion as jump. */
// attr bool leaf = false; /* has rb_threadptr_execute_interrupts() */
{
    if (RTEST(val)) {
	RUBY_VM_CHECK_INTS(ec);
	JUMP(dst);
    }
}

/* if val is false or nil, set PC to (PC + dst). */
DEFINE_INSN
branchunless
(OFFSET dst)
(VALUE val)
()
/* Same discussion as jump. */
// attr bool leaf = false; /* has rb_threadptr_execute_interrupts() */
{
    if (!RTEST(val)) {
	RUBY_VM_CHECK_INTS(ec);
	JUMP(dst);
    }
}

/* if val is nil, set PC to (PC + dst). */
DEFINE_INSN
branchnil
(OFFSET dst)
(VALUE val)
()
/* Same discussion as jump. */
// attr bool leaf = false; /* has rb_threadptr_execute_interrupts() */
{
    if (NIL_P(val)) {
	RUBY_VM_CHECK_INTS(ec);
	JUMP(dst);
    }
}

/**********************************************************/
/* for optimize                                           */
/**********************************************************/

/* push inline-cached value and go to dst if it is valid */
DEFINE_INSN
getinlinecache
(OFFSET dst, IC ic)
()
(VALUE val)
{
    if (vm_ic_hit_p(ic, GET_EP())) {
	val = ic->ic_value.value;
	JUMP(dst);
    }
    else {
	val = Qnil;
    }
}

/* set inline cache */
DEFINE_INSN
setinlinecache
(IC ic)
(VALUE val)
(VALUE val)
{
    vm_ic_update(ic, val, GET_EP());
}

/* run iseq only once */
DEFINE_INSN
once
(ISEQ iseq, ISE ise)
()
(VALUE val)
{
    val = vm_once_dispatch(ec, iseq, ise);
}

/* case dispatcher, jump by table if possible */
DEFINE_INSN
opt_case_dispatch
(CDHASH hash, OFFSET else_offset)
(..., VALUE key)
()
// attr rb_snum_t sp_inc = -1;
{
    OFFSET dst = vm_case_dispatch(hash, else_offset, key);

    if (dst) {
	JUMP(dst);
    }
}

/** simple functions */

/* optimized X+Y. */
DEFINE_INSN
opt_plus
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
/* Array + anything can be handled inside of opt_plus, and that
 * anything is converted into array using #to_ary. */
// attr bool leaf = false; /* has rb_to_array_type() */
{
    val = vm_opt_plus(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X-Y. */
DEFINE_INSN
opt_minus
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_minus(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X*Y. */
DEFINE_INSN
opt_mult
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_mult(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X/Y. */
DEFINE_INSN
opt_div
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_div(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X%Y. */
DEFINE_INSN
opt_mod
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_mod(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X==Y. */
DEFINE_INSN
opt_eq
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
/* This instruction can compare a string with non-string.  This
 * (somewhat) coerces the non-string into a string, via a method
 * call. */
// attr bool leaf = false; /* has rb_str_equal() */
{
    val = opt_eq_func(recv, obj, ci, cc);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X!=Y. */
DEFINE_INSN
opt_neq
(CALL_INFO ci_eq, CALL_CACHE cc_eq, CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
/* Same discussion as opt_eq. */
// attr bool leaf = false; /* has rb_str_equal() */
{
    val = vm_opt_neq(ci, cc, ci_eq, cc_eq, recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X<Y. */
DEFINE_INSN
opt_lt
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_lt(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X<=Y. */
DEFINE_INSN
opt_le
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_le(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X>Y. */
DEFINE_INSN
opt_gt
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_gt(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X>=Y. */
DEFINE_INSN
opt_ge
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_ge(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* << */
DEFINE_INSN
opt_ltlt
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_ltlt(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X&Y. */
DEFINE_INSN
opt_and
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_and(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized X|Y. */
DEFINE_INSN
opt_or
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_or(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* [] */
DEFINE_INSN
opt_aref
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
/* This is complicated.  In case of hash, vm_opt_aref() resorts to
 * rb_hash_aref().  If `recv` has no `obj`, this function then yields
 * default_proc.  This is a method call.  So opt_aref is
 * (surprisingly) not leaf. */
// attr bool leaf = false; /* has rb_funcall() */ /* calls #yield */
{
    val = vm_opt_aref(recv, obj);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* recv[obj] = set */
DEFINE_INSN
opt_aset
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj, VALUE set)
(VALUE val)
/* This is another story than opt_aref.  When vm_opt_aset() resorts
 * to rb_hash_aset(), which should call #hash for `obj`. */
// attr bool leaf = false; /* has rb_funcall() */ /* calls #hash */
{
    val = vm_opt_aset(recv, obj, set);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* recv[str] = set */
DEFINE_INSN
opt_aset_with
(VALUE key, CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE val)
(VALUE val)
/* Same discussion as opt_aset. */
// attr bool leaf = false; /* has rb_funcall() */ /* calls #hash */
{
    VALUE tmp = vm_opt_aset_with(recv, key, val);

    if (tmp != Qundef) {
	val = tmp;
    }
    else {
#ifndef MJIT_HEADER
	TOPN(0) = rb_str_resurrect(key);
	PUSH(val);
#endif
        CALL_SIMPLE_METHOD();
    }
}

/* recv[str] */
DEFINE_INSN
opt_aref_with
(VALUE key, CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
/* Same discussion as opt_aref. */
// attr bool leaf = false; /* has rb_funcall() */ /* calls #yield */
{
    val = vm_opt_aref_with(recv, key);

    if (val == Qundef) {
#ifndef MJIT_HEADER
	PUSH(rb_str_resurrect(key));
#endif
        CALL_SIMPLE_METHOD();
    }
}

/* optimized length */
DEFINE_INSN
opt_length
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_length(recv, BOP_LENGTH);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized size */
DEFINE_INSN
opt_size
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_length(recv, BOP_SIZE);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized empty? */
DEFINE_INSN
opt_empty_p
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_empty_p(recv);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized succ */
DEFINE_INSN
opt_succ
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_succ(recv);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized not */
DEFINE_INSN
opt_not
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_not(ci, cc, recv);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* optimized regexp match */
DEFINE_INSN
opt_regexpmatch1
(VALUE recv)
(VALUE obj)
(VALUE val)
// attr bool leaf = BASIC_OP_UNREDEFINED_P(BOP_MATCH, REGEXP_REDEFINED_OP_FLAG);
{
    val = vm_opt_regexpmatch1(recv, obj);
}

/* optimized regexp match 2 */
DEFINE_INSN
opt_regexpmatch2
(CALL_INFO ci, CALL_CACHE cc)
(VALUE obj2, VALUE obj1)
(VALUE val)
{
    val = vm_opt_regexpmatch2(obj2, obj1);

    if (val == Qundef) {
        CALL_SIMPLE_METHOD();
    }
}

/* call native compiled method */
DEFINE_INSN
opt_call_c_function
(rb_insn_func_t funcptr)
()
()
// attr bool leaf = false; /* anything can happen inside */
// attr bool handles_sp = true;
{
    reg_cfp = (funcptr)(ec, reg_cfp);

    if (reg_cfp == 0) {
	VALUE err = ec->errinfo;
	ec->errinfo = Qnil;
	THROW_EXCEPTION(err);
    }

    RESTORE_REGS();
    NEXT_INSN();
}

/* BLT */
DEFINE_INSN
bitblt
()
()
(VALUE ret)
{
    ret = rb_str_new2("a bit of bacon, lettuce and tomato");
}

/* The Answer to Life, the Universe, and Everything */
DEFINE_INSN
answer
()
()
(VALUE ret)
{
    ret = INT2FIX(42);
}