forked from nonakap/xnp2
-
Notifications
You must be signed in to change notification settings - Fork 4
/
Copy pathi286x.cpp
5308 lines (4613 loc) · 99.6 KB
/
i286x.cpp
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
#include "compiler.h"
#include "cpucore.h"
#include "i286x.h"
#include "i286xadr.h"
#include "i286xs.h"
#include "i286xrep.h"
#include "i286xcts.h"
#include "pccore.h"
#include "iocore.h"
#include "i286x.mcr"
#include "i286xea.mcr"
#include "v30patch.h"
#include "bios/bios.h"
#include "dmax86.h"
#if defined(ENABLE_TRAP)
#include "trap/inttrap.h"
#include "trap/steptrap.h"
#endif
I286CORE i286core;
const UINT8 iflags[256] = { // Z_FLAG, S_FLAG, P_FLAG
0x44, 0x00, 0x00, 0x04, 0x00, 0x04, 0x04, 0x00,
0x00, 0x04, 0x04, 0x00, 0x04, 0x00, 0x00, 0x04,
0x00, 0x04, 0x04, 0x00, 0x04, 0x00, 0x00, 0x04,
0x04, 0x00, 0x00, 0x04, 0x00, 0x04, 0x04, 0x00,
0x00, 0x04, 0x04, 0x00, 0x04, 0x00, 0x00, 0x04,
0x04, 0x00, 0x00, 0x04, 0x00, 0x04, 0x04, 0x00,
0x04, 0x00, 0x00, 0x04, 0x00, 0x04, 0x04, 0x00,
0x00, 0x04, 0x04, 0x00, 0x04, 0x00, 0x00, 0x04,
0x00, 0x04, 0x04, 0x00, 0x04, 0x00, 0x00, 0x04,
0x04, 0x00, 0x00, 0x04, 0x00, 0x04, 0x04, 0x00,
0x04, 0x00, 0x00, 0x04, 0x00, 0x04, 0x04, 0x00,
0x00, 0x04, 0x04, 0x00, 0x04, 0x00, 0x00, 0x04,
0x04, 0x00, 0x00, 0x04, 0x00, 0x04, 0x04, 0x00,
0x00, 0x04, 0x04, 0x00, 0x04, 0x00, 0x00, 0x04,
0x00, 0x04, 0x04, 0x00, 0x04, 0x00, 0x00, 0x04,
0x04, 0x00, 0x00, 0x04, 0x00, 0x04, 0x04, 0x00,
0x80, 0x84, 0x84, 0x80, 0x84, 0x80, 0x80, 0x84,
0x84, 0x80, 0x80, 0x84, 0x80, 0x84, 0x84, 0x80,
0x84, 0x80, 0x80, 0x84, 0x80, 0x84, 0x84, 0x80,
0x80, 0x84, 0x84, 0x80, 0x84, 0x80, 0x80, 0x84,
0x84, 0x80, 0x80, 0x84, 0x80, 0x84, 0x84, 0x80,
0x80, 0x84, 0x84, 0x80, 0x84, 0x80, 0x80, 0x84,
0x80, 0x84, 0x84, 0x80, 0x84, 0x80, 0x80, 0x84,
0x84, 0x80, 0x80, 0x84, 0x80, 0x84, 0x84, 0x80,
0x84, 0x80, 0x80, 0x84, 0x80, 0x84, 0x84, 0x80,
0x80, 0x84, 0x84, 0x80, 0x84, 0x80, 0x80, 0x84,
0x80, 0x84, 0x84, 0x80, 0x84, 0x80, 0x80, 0x84,
0x84, 0x80, 0x80, 0x84, 0x80, 0x84, 0x84, 0x80,
0x80, 0x84, 0x84, 0x80, 0x84, 0x80, 0x80, 0x84,
0x84, 0x80, 0x80, 0x84, 0x80, 0x84, 0x84, 0x80,
0x84, 0x80, 0x80, 0x84, 0x80, 0x84, 0x84, 0x80,
0x80, 0x84, 0x84, 0x80, 0x84, 0x80, 0x80, 0x84};
void i286x_initialize(void) {
i286xadr_init();
v30xinit();
}
void i286x_deinitialize(void) {
if (CPU_EXTMEM) {
_MFREE(CPU_EXTMEM);
CPU_EXTMEM = NULL;
CPU_EXTMEMSIZE = 0;
}
}
static void i286x_initreg(void) {
I286_CS = 0xf000;
CS_BASE = 0xf0000;
I286_IP = 0xfff0;
i286core.s.adrsmask = 0xfffff;
i286x_resetprefetch();
}
void i286x_reset(void) {
ZeroMemory(&i286core.s, sizeof(i286core.s));
i286x_initreg();
}
void i286x_shut(void) {
ZeroMemory(&i286core.s, offsetof(I286STAT, cpu_type));
i286x_initreg();
}
void i286x_setextsize(UINT32 size) {
if (CPU_EXTMEMSIZE != size) {
if (CPU_EXTMEM) {
_MFREE(CPU_EXTMEM);
CPU_EXTMEM = NULL;
}
if (size) {
CPU_EXTMEM = (UINT8 *)_MALLOC(size + 16, "EXTMEM");
if (CPU_EXTMEM == NULL) {
size = 0;
}
}
CPU_EXTMEMSIZE = size;
}
i286core.e.ems[0] = mem + 0xc0000;
i286core.e.ems[1] = mem + 0xc4000;
i286core.e.ems[2] = mem + 0xc8000;
i286core.e.ems[3] = mem + 0xcc000;
}
void i286x_setemm(UINT frame, UINT32 addr) {
UINT8 *ptr;
frame &= 3;
if (addr < USE_HIMEM) {
ptr = mem + addr;
}
else if ((addr - 0x100000 + 0x4000) <= CPU_EXTMEMSIZE) {
ptr = CPU_EXTMEM + (addr - 0x100000);
}
else {
ptr = mem + 0xc0000 + (frame << 14);
}
i286core.e.ems[frame] = ptr;
}
LABEL void i286x_resetprefetch(void) {
__asm {
pushad
movzx esi, I286_IP
RESET_XPREFETCH
mov dword ptr (i286core.s.prefetchque), ebx
popad
ret
}
}
LABEL void __fastcall i286x_interrupt(UINT8 vect) {
__asm {
pushad
push ecx
movzx ebx, I286_SP
sub bx, 2
// hlt..
cmp byte ptr (i286core.s.prefetchque), 0f4h // hlt
jne short nonhlt
inc I286_IP
nonhlt: mov edi, SS_BASE
lea ecx, [edi + ebx]
sub bx, 2
mov dx, I286_FLAG
and dh, 0fh
and I286_FLAG, not (T_FLAG or I_FLAG)
mov I286_TRAP, 0
call i286_memorywrite_w
lea ecx, [edi + ebx]
sub bx, 2
mov dx, I286_CS
call i286_memorywrite_w
mov I286_SP, bx
lea ecx, [edi + ebx]
mov dx, I286_IP
call i286_memorywrite_w
pop ecx
xor eax, eax
mov al, cl
mov eax, dword ptr I286_MEM[eax*4]
mov I286_IP, ax
movzx esi, ax
shr eax, 16
mov I286_CS, ax
shl eax, 4 // make segreg
mov CS_BASE, eax
RESET_XPREFETCH
mov dword ptr (i286core.s.prefetchque), ebx
popad
ret
}
}
// I286xルーチンのローカルからの割り込み
LABEL void __fastcall i286x_localint(void) {
__asm {
push ecx
movzx ebx, I286_SP
sub bx, 2
mov edi, SS_BASE
lea ecx, [edi + ebx]
sub bx, 2
mov dx, I286_FLAG
and dh, 0fh
and I286_FLAG, not (T_FLAG or I_FLAG)
mov I286_TRAP, 0
call i286_memorywrite_w
lea ecx, [edi + ebx]
sub bx, 2
mov dx, I286_CS
call i286_memorywrite_w
mov I286_SP, bx
lea ecx, [edi + ebx]
mov dx, si // I286_IP
call i286_memorywrite_w
pop ecx
mov eax, dword ptr I286_MEM[ecx*4]
mov si, ax
shr eax, 16
mov I286_CS, ax
shl eax, 4 // make segreg
mov CS_BASE, eax
RESET_XPREFETCH
ret
}
}
// プロテクトモードのセレクタ(in ax / ret eax)
LABEL void __fastcall i286x_selector(void) {
__asm {
mov ecx, dword ptr (I286_GDTR.base)
test eax, 4
je short ixsl_1
mov ecx, dword ptr (I286_LDTRC.base)
ixsl_1: and eax, not 7
and ecx, 0ffffffh
lea ecx, [ecx + eax + 2]
call i286_memoryread_w
push eax
add ecx, 2
call i286_memoryread
pop ecx
and eax, 0ffh
movzx ecx, cx
shl eax, 16
add eax, ecx
ret
}
}
LABEL void i286x(void) {
__asm {
pushad
mov ebx, dword ptr (i286core.s.prefetchque)
movzx esi, I286_IP
cmp I286_TRAP, 0
jne short i286_trapping
cmp dmac.working, 0
jne short i286_dma_mnlp
i286_mnlp:
#if defined(ENABLE_TRAP)
mov edx, esi
movzx ecx, I286_CS
call steptrap
#endif
movzx eax, bl
call i286op[eax*4]
cmp I286_REMCLOCK, 0
jg i286_mnlp
mov dword ptr (i286core.s.prefetchque), ebx
mov I286_IP, si
popad
ret
align 16
i286_dma_mnlp:
#if defined(ENABLE_TRAP)
mov edx, esi
movzx ecx, I286_CS
call steptrap
#endif
movzx eax, bl
call i286op[eax*4]
call dmax86
cmp I286_REMCLOCK, 0
jg i286_dma_mnlp
mov dword ptr (i286core.s.prefetchque), ebx
mov I286_IP, si
popad
ret
align 16
i286_trapping:
#if defined(ENABLE_TRAP)
mov edx, esi
movzx ecx, I286_CS
call steptrap
#endif
movzx eax, bl
call i286op[eax*4]
cmp I286_TRAP, 0
je i286notrap
mov ecx, 1
call i286x_localint
i286notrap: mov dword ptr (i286core.s.prefetchque), ebx
mov I286_IP, si
popad
ret
}
}
LABEL void i286x_step(void) {
__asm {
pushad
mov ebx, dword ptr (i286core.s.prefetchque)
movzx esi, I286_IP
#if defined(ENABLE_TRAP)
mov edx, esi
movzx ecx, I286_CS
call steptrap
#endif
movzx eax, bl
call i286op[eax*4]
cmp I286_TRAP, 0
je short nexts
mov ecx, 1
call i286x_localint
nexts:
mov dword ptr (i286core.s.prefetchque), ebx
mov I286_IP, si
call dmax86
popad
ret
}
}
LABEL void removeprefix(void) {
__asm {
mov i286core.s.prefix, 0
mov eax, DS_BASE
mov DS_FIX, eax
mov eax, SS_BASE
mov SS_FIX, eax
ret
}
}
I286 _reserved(void) {
__asm {
// inc si // 01/08/31
INT_NUM(6)
}
}
// ----
I286 add_ea_r8(void) { // 00: add EA, REG8
__asm {
PREPART_EA_REG8(2)
add byte ptr I286_REG[eax], dl
FLAG_STORE_OF
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG8(7)
add byte ptr I286_MEM[ecx], dl
FLAG_STORE_OF
ret
EXTMEM_EA_REG8
add al, byte ptr I286_REG[ebp]
mov dl, al
FLAG_STORE_OF
jmp i286_memorywrite
}
}
I286 add_ea_r16(void) { // 01: add EA, REG16
__asm {
PREPART_EA_REG16(2)
add word ptr I286_REG[eax*2], dx
FLAG_STORE_OF
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG16(7)
add word ptr I286_MEM[ecx], dx
FLAG_STORE_OF
ret
EXTMEM_EA_REG16
add ax, word ptr I286_REG[ebp]
mov dx, ax
FLAG_STORE_OF
jmp i286_memorywrite_w
}
}
I286 add_r8_ea(void) { // 02: add REG8, EA
__asm {
PREPART_REG8_EA(2, 7)
add I286_REG[ebp], al
FLAG_STORE_OF
ret
}
}
I286 add_r16_ea(void) { // 03: add REG16, EA
__asm {
PREPART_REG16_EA(2, 7)
add I286_REG[ebp], ax
FLAG_STORE_OF
ret
}
}
I286 add_al_data8(void) { // 04: add al, DATA8
__asm {
I286CLOCK(3)
add I286_AL, bh
FLAG_STORE_OF
GET_NEXTPRE2
ret
}
}
I286 add_ax_data16(void) { // 05: add ax, DATA16
__asm {
I286CLOCK(3)
GET_NEXTPRE3a
add I286_AX, bx
FLAG_STORE_OF
GET_NEXTPRE3b
ret
}
}
I286 push_es(void) { // 06: push es
__asm {
GET_NEXTPRE1
I286CLOCK(3)
REGPUSH1(I286_ES)
}
}
I286 pop_es(void) { // 07: pop es
__asm {
I286CLOCK(5)
REGPOP(I286_ES)
movzx eax, ax
test byte ptr (I286_MSW), MSW_PE
jne short pop_es_pe
shl eax, 4 // make segreg
pop_es_base: mov ES_BASE, eax
GET_NEXTPRE1
ret
pop_es_pe: push offset pop_es_base
jmp i286x_selector
}
}
I286 or_ea_r8(void) { // 08: or EA, REG8
__asm {
PREPART_EA_REG8(2)
or byte ptr I286_REG[eax], dl
FLAG_STORE0
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG8(7)
or byte ptr I286_MEM[ecx], dl
FLAG_STORE0
ret
EXTMEM_EA_REG8
or al, byte ptr I286_REG[ebp]
mov dl, al
FLAG_STORE0
jmp i286_memorywrite
}
}
I286 or_ea_r16(void) { // 09: or EA, REG16
__asm {
PREPART_EA_REG16(2)
or word ptr I286_REG[eax*2], dx
FLAG_STORE0
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG16(7)
or word ptr I286_MEM[ecx], dx
FLAG_STORE0
ret
EXTMEM_EA_REG16
or ax, word ptr I286_REG[ebp]
mov dx, ax
FLAG_STORE0
jmp i286_memorywrite_w
}
}
I286 or_r8_ea(void) { // 0A: or REG8, EA
__asm {
PREPART_REG8_EA(2, 7)
or I286_REG[ebp], al
FLAG_STORE0
ret
}
}
I286 or_r16_ea(void) { // 0B: or REG16, EA
__asm {
PREPART_REG16_EA(2, 7)
or I286_REG[ebp], ax
FLAG_STORE0
ret
}
}
I286 or_al_data8(void) { // 0C: or al, DATA8
__asm {
I286CLOCK(3)
or I286_AL, bh
FLAG_STORE0
GET_NEXTPRE2
ret
}
}
I286 or_ax_data16(void) { // 0D: or ax, DATA16
__asm {
I286CLOCK(3)
GET_NEXTPRE3a
or I286_AX, bx
FLAG_STORE0
GET_NEXTPRE3b
ret
}
}
I286 push_cs(void) { // 0E: push es
__asm {
GET_NEXTPRE1
I286CLOCK(3)
REGPUSH1(I286_CS)
}
}
I286 adc_ea_r8(void) { // 10: adc EA, REG8
__asm {
PREPART_EA_REG8(2)
CFLAG_LOAD
adc byte ptr I286_REG[eax], dl
FLAG_STORE_OF
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG8(7)
CFLAG_LOAD
adc byte ptr I286_MEM[ecx], dl
FLAG_STORE_OF
ret
EXTMEM_EA_REG8
CFLAG_LOAD
adc al, byte ptr I286_REG[ebp]
mov dl, al
FLAG_STORE_OF
jmp i286_memorywrite
}
}
I286 adc_ea_r16(void) { // 11: adc EA, REG16
__asm {
PREPART_EA_REG16(2)
CFLAG_LOAD
adc word ptr I286_REG[eax*2], dx
FLAG_STORE_OF
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG16(7)
CFLAG_LOAD
adc word ptr I286_MEM[ecx], dx
FLAG_STORE_OF
ret
EXTMEM_EA_REG16
CFLAG_LOAD
adc ax, word ptr I286_REG[ebp]
mov dx, ax
FLAG_STORE_OF
jmp i286_memorywrite_w
}
}
I286 adc_r8_ea(void) { // 12: adc REG8, EA
__asm {
PREPART_REG8_EA(2, 7)
CFLAG_LOAD
adc I286_REG[ebp], al
FLAG_STORE_OF
ret
}
}
I286 adc_r16_ea(void) { // 13: adc REG16, EA
__asm {
PREPART_REG16_EA(2, 7)
CFLAG_LOAD
adc I286_REG[ebp], ax
FLAG_STORE_OF
ret
}
}
I286 adc_al_data8(void) { // 14: adc al, DATA8
__asm {
I286CLOCK(3)
CFLAG_LOAD
adc I286_AL, bh
FLAG_STORE_OF
GET_NEXTPRE2
ret
}
}
I286 adc_ax_data16(void) { // 15: adc ax, DATA16
__asm {
I286CLOCK(3)
GET_NEXTPRE3a
CFLAG_LOAD
adc I286_AX, bx
FLAG_STORE_OF
GET_NEXTPRE3b
ret
}
}
I286 push_ss(void) { // 16: push ss
__asm {
GET_NEXTPRE1
I286CLOCK(3)
REGPUSH1(I286_SS)
}
}
I286 pop_ss(void) { // 17: pop ss
__asm {
I286CLOCK(5)
REGPOP(I286_SS)
movzx eax, ax
test byte ptr (I286_MSW), MSW_PE
jne short pop_ss_pe
shl eax, 4 // make segreg
pop_ss_base: mov SS_BASE, eax
mov SS_FIX, eax
cmp i286core.s.prefix, 0 // 00/06/24
jne prefix_exist
noprefix:
movzx ebp, bh
GET_NEXTPRE1
jmp i286op[ebp*4]
pop_ss_pe: push offset pop_ss_base
jmp i286x_selector
prefix_exist: pop eax // eax<-offset removeprefix
call eax
jmp noprefix
}
}
I286 sbb_ea_r8(void) { // 18: sbb EA, REG8
__asm {
PREPART_EA_REG8(2)
CFLAG_LOAD
sbb byte ptr I286_REG[eax], dl
FLAG_STORE_OF
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG8(7)
CFLAG_LOAD
sbb byte ptr I286_MEM[ecx], dl
FLAG_STORE_OF
ret
EXTMEM_EA_REG8
CFLAG_LOAD
sbb al, byte ptr I286_REG[ebp]
mov dl, al
FLAG_STORE_OF
jmp i286_memorywrite
}
}
I286 sbb_ea_r16(void) { // 19: sbb EA, REG16
__asm {
PREPART_EA_REG16(2)
CFLAG_LOAD
sbb word ptr I286_REG[eax*2], dx
FLAG_STORE_OF
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG16(7)
CFLAG_LOAD
sbb word ptr I286_MEM[ecx], dx
FLAG_STORE_OF
ret
EXTMEM_EA_REG16
CFLAG_LOAD
sbb ax, word ptr I286_REG[ebp]
mov dx, ax
FLAG_STORE_OF
jmp i286_memorywrite_w
}
}
I286 sbb_r8_ea(void) { // 1A: sbb REG8, EA
__asm {
PREPART_REG8_EA(2, 7)
CFLAG_LOAD
sbb I286_REG[ebp], al
FLAG_STORE_OF
ret
}
}
I286 sbb_r16_ea(void) { // 1B: sbb REG16, EA
__asm {
PREPART_REG16_EA(2, 7)
CFLAG_LOAD
sbb I286_REG[ebp], ax
FLAG_STORE_OF
ret
}
}
I286 sbb_al_data8(void) { // 1C: sbb al, DATA8
__asm {
I286CLOCK(3)
CFLAG_LOAD
sbb I286_AL, bh
FLAG_STORE_OF
GET_NEXTPRE2
ret
}
}
I286 sbb_ax_data16(void) { // 1D: sbb ax, DATA16
__asm {
I286CLOCK(3)
GET_NEXTPRE3a
CFLAG_LOAD
sbb I286_AX, bx
FLAG_STORE_OF
GET_NEXTPRE3b
ret
}
}
I286 push_ds(void) { // 1E: push ds
__asm {
GET_NEXTPRE1
I286CLOCK(3)
REGPUSH1(I286_DS)
}
}
I286 pop_ds(void) { // 1F: pop ds
__asm {
I286CLOCK(5)
REGPOP(I286_DS)
movzx eax, ax
test byte ptr (I286_MSW), MSW_PE
jne short pop_ds_pe
shl eax, 4 // make segreg
pop_ds_base: mov DS_BASE, eax
mov DS_FIX, eax
GET_NEXTPRE1
ret
pop_ds_pe: push offset pop_ds_base
jmp i286x_selector
}
}
I286 and_ea_r8(void) { // 20: and EA, REG8
__asm {
PREPART_EA_REG8(2)
and byte ptr I286_REG[eax], dl
FLAG_STORE0
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG8(7)
and byte ptr I286_MEM[ecx], dl
FLAG_STORE0
ret
EXTMEM_EA_REG8
and al, byte ptr I286_REG[ebp]
mov dl, al
FLAG_STORE0
jmp i286_memorywrite
}
}
I286 and_ea_r16(void) { // 21: and EA, REG16
__asm {
PREPART_EA_REG16(2)
and word ptr I286_REG[eax*2], dx
FLAG_STORE0
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG16(7)
and word ptr I286_MEM[ecx], dx
FLAG_STORE0
ret
EXTMEM_EA_REG16
and ax, word ptr I286_REG[ebp]
mov dx, ax
FLAG_STORE0
jmp i286_memorywrite_w
}
}
I286 and_r8_ea(void) { // 22: and REG8, EA
__asm {
PREPART_REG8_EA(2, 7)
and I286_REG[ebp], al
FLAG_STORE0
ret
}
}
I286 and_r16_ea(void) { // 23: and REG16, EA
__asm {
PREPART_REG16_EA(2, 7)
and I286_REG[ebp], ax
FLAG_STORE0
ret
}
}
I286 and_al_data8(void) { // 24: and al, DATA8
__asm {
I286CLOCK(3)
and I286_AL, bh
FLAG_STORE0
GET_NEXTPRE2
ret
}
}
I286 and_ax_data16(void) { // 25: and ax, DATA16
__asm {
I286CLOCK(3)
GET_NEXTPRE3a
and I286_AX, bx
FLAG_STORE0
GET_NEXTPRE3b
ret
}
}
I286 segprefix_es(void) { // 26: es:
__asm {
mov eax, ES_BASE
mov DS_FIX, eax
mov SS_FIX, eax
I286PREFIX(i286op)
}
}
I286 _daa(void) { // 27: daa
__asm {
I286CLOCK(3)
FLAG_LOAD
mov ax, I286_AX
daa
mov I286_AX, ax
FLAG_STORE
GET_NEXTPRE1
ret
}
}
I286 sub_ea_r8(void) { // 28: sub EA, REG8
__asm {
PREPART_EA_REG8(2)
sub byte ptr I286_REG[eax], dl
FLAG_STORE_OF
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG8(7)
sub byte ptr I286_MEM[ecx], dl
FLAG_STORE_OF
ret
EXTMEM_EA_REG8
sub al, byte ptr I286_REG[ebp]
mov dl, al
FLAG_STORE_OF
jmp i286_memorywrite
}
}
I286 sub_ea_r16(void) { // 29: sub EA, REG16
__asm {
PREPART_EA_REG16(2)
sub word ptr I286_REG[eax*2], dx
FLAG_STORE_OF
GET_NEXTPRE2 // ea_regの regregだけ
ret
MEMORY_EA_REG16(7)
sub word ptr I286_MEM[ecx], dx
FLAG_STORE_OF
ret
EXTMEM_EA_REG16
sub ax, word ptr I286_REG[ebp]
mov dx, ax
FLAG_STORE_OF
jmp i286_memorywrite_w
}
}
I286 sub_r8_ea(void) { // 2A: sub REG8, EA
__asm {
PREPART_REG8_EA(2, 7)
sub I286_REG[ebp], al
FLAG_STORE_OF
ret
}
}
I286 sub_r16_ea(void) { // 2B: sub REG16, EA
__asm {
PREPART_REG16_EA(2, 7)
sub I286_REG[ebp], ax
FLAG_STORE_OF
ret
}
}