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
|
/** @file
* IPRT - Assembly Functions, x86 16-bit Watcom C/C++ pragma aux.
*/
/*
* Copyright (C) 2006-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
#ifndef IPRT_INCLUDED_asm_watcom_x86_16_h
#define IPRT_INCLUDED_asm_watcom_x86_16_h
/* no pragma once */
#ifndef IPRT_INCLUDED_asm_h
# error "Don't include this header directly."
#endif
/*
* Turns out we cannot use 'ds' for segment stuff here because the compiler
* seems to insists on loading the DGROUP segment into 'ds' before calling
* stuff when using -ecc. Using 'es' instead as this seems to work fine.
*
* Note! The #undef that preceds the #pragma aux statements is for undoing
* the mangling, because the symbol in #pragma aux [symbol] statements
* doesn't get subjected to preprocessing. This is also why we include
* the watcom header at both the top and the bottom of asm.h file.
*/
#undef ASMCompilerBarrier
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if 0 /* overkill version. */
# pragma aux ASMCompilerBarrier = \
"nop" \
parm [] \
modify exact [ax bx cx dx es ds];
# else
# pragma aux ASMCompilerBarrier = \
"" \
parm [] \
modify exact [];
# endif
#endif
#undef ASMNopPause
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMNopPause = \
".686p" \
".xmm2" \
"pause" \
parm [] nomemory \
modify exact [] nomemory;
#endif
#undef ASMAtomicXchgU8
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicXchgU8 = \
"xchg es:[bx], al" \
parm [es bx] [al] \
value [al] \
modify exact [al];
#endif
#undef ASMAtomicXchgU16
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicXchgU16 = \
"xchg es:[bx], ax" \
parm [es bx] [ax] \
value [ax] \
modify exact [ax];
#endif
#undef ASMAtomicXchgU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicXchgU32 = \
".386" \
"shl ecx, 16" \
"mov cx, ax" \
"xchg es:[bx], ecx" \
"mov eax, ecx" \
"shr ecx, 16" \
parm [es bx] [ax cx] \
value [ax cx] \
modify exact [ax cx];
#endif
#undef ASMAtomicXchgU64
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicXchgU64 = \
".586" \
"shl eax, 16" \
"mov ax, bx" /* eax = high dword */ \
"shl ecx, 16" \
"mov cx, dx" /* ecx = low dword */ \
"mov ebx, ecx" /* ebx = low */ \
"mov ecx, eax" /* ecx = high */ \
"try_again:" \
"lock cmpxchg8b es:[si]" \
"jnz try_again" \
"xchg eax, edx" \
"mov ebx, eax" \
"shr eax, 16" \
"mov ecx, edx" \
"shr ecx, 16" \
parm [es si] [dx cx bx ax] \
value [dx cx bx ax] \
modify exact [dx cx bx ax];
#endif
#undef ASMAtomicCmpXchgU8
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicCmpXchgU8 = \
".486" \
"lock cmpxchg es:[bx], cl" \
"setz al" \
parm [es bx] [cl] [al] \
value [al] \
modify exact [al];
#endif
#undef ASMAtomicCmpXchgU16
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicCmpXchgU16 = \
".486" \
"lock cmpxchg es:[bx], cx" \
"setz al" \
parm [es bx] [cx] [ax] \
value [al] \
modify exact [ax];
#endif
#undef ASMAtomicCmpXchgU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicCmpXchgU32 = \
".486" \
"shl ecx, 16" \
"mov cx, dx" \
"shl eax, 16" \
"mov ax, di" \
"rol eax, 16" \
"lock cmpxchg es:[bx], ecx" \
"setz al" \
parm [es bx] [cx dx] [ax di] \
value [al] \
modify exact [ax cx];
#endif
/* ASMAtomicCmpXchgU64: External assembly implementation, too few registers for parameters. */
/* ASMAtomicCmpXchgExU32: External assembly implementation, too few registers for parameters. */
/* ASMAtomicCmpXchgExU64: External assembly implementation, too few registers for parameters. */
#undef ASMSerializeInstructionCpuId
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMSerializeInstructionCpuId = \
".586" \
"xor eax, eax" \
"cpuid" \
parm [] \
modify exact [ax bx cx dx];
#endif
#undef ASMSerializeInstructionIRet
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMSerializeInstructionIRet = \
"pushf" \
"push cs" \
"call foo" /* 'push offset done' doesn't work */ \
"jmp done" \
"foo:" \
"iret" \
"done:" \
parm [] \
modify exact [];
#endif
#undef ASMSerializeInstructionRdTscp
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMSerializeInstructionRdTscp = \
0x0f 0x01 0xf9 \
parm [] \
modify exact [ax dx cx];
#endif
#undef ASMAtomicReadU64
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicReadU64 = \
".586" \
"xor eax, eax" \
"xor edx, edx" \
"xor ebx, ebx" \
"xor ecx, ecx" \
"lock cmpxchg8b es:[si]" \
"xchg eax, edx" \
"mov ebx, eax" \
"shr eax, 16" \
"mov ecx, edx" \
"shr ecx, 16" \
parm [es si] \
value [dx cx bx ax] \
modify exact [dx cx bx ax];
#endif
#undef ASMAtomicUoReadU64
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicUoReadU64 = \
".586" \
"xor eax, eax" \
"xor edx, edx" \
"xor ebx, ebx" \
"xor ecx, ecx" \
"lock cmpxchg8b es:[si]" \
"xchg eax, edx" \
"mov ebx, eax" \
"shr eax, 16" \
"mov ecx, edx" \
"shr ecx, 16" \
parm [es si] \
value [dx cx bx ax] \
modify exact [dx cx bx ax];
#endif
#undef ASMAtomicAddU16
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicAddU16 = \
".486" \
"lock xadd es:[bx], ax" \
parm [es bx] [ax] \
value [ax] \
modify exact [ax];
#endif
#undef ASMAtomicAddU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicAddU32 = \
".486" \
"shl edx, 16" \
"mov dx, ax" \
"lock xadd es:[bx], edx" \
"mov ax, dx" \
"shr edx, 16" \
parm [es bx] [ax dx] \
value [ax dx] \
modify exact [ax dx];
#endif
#undef ASMAtomicIncU16
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicIncU16 = \
".486" \
"mov ax, 1" \
"lock xadd es:[bx], ax" \
"inc ax" \
parm [es bx] \
value [ax] \
modify exact [ax];
#endif
#undef ASMAtomicIncU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicIncU32 = \
".486" \
"mov edx, 1" \
"lock xadd es:[bx], edx" \
"inc edx" \
"mov ax, dx" \
"shr edx, 16" \
parm [es bx] \
value [ax dx] \
modify exact [ax dx];
#endif
/* ASMAtomicIncU64: Should be done by C inline or in external file. */
#undef ASMAtomicDecU16
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicDecU16 = \
".486" \
"mov ax, 0ffffh" \
"lock xadd es:[bx], ax" \
"dec ax" \
parm [es bx] \
value [ax] \
modify exact [ax];
#endif
#undef ASMAtomicDecU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicDecU32 = \
".486" \
"mov edx, 0ffffffffh" \
"lock xadd es:[bx], edx" \
"dec edx" \
"mov ax, dx" \
"shr edx, 16" \
parm [es bx] \
value [ax dx] \
modify exact [ax dx];
#endif
/* ASMAtomicDecU64: Should be done by C inline or in external file. */
#undef ASMAtomicOrU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicOrU32 = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"lock or es:[bx], edx" \
parm [es bx] [ax dx] \
modify exact [dx];
#endif
/* ASMAtomicOrU64: Should be done by C inline or in external file. */
#undef ASMAtomicAndU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicAndU32 = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"lock and es:[bx], edx" \
parm [es bx] [ax dx] \
modify exact [dx];
#endif
/* ASMAtomicAndU64: Should be done by C inline or in external file. */
#undef ASMAtomicUoOrU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicUoOrU32 = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"or es:[bx], edx" \
parm [es bx] [ax dx] \
modify exact [dx];
#endif
/* ASMAtomicUoOrU64: Should be done by C inline or in external file. */
#undef ASMAtomicUoAndU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicUoAndU32 = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"and es:[bx], edx" \
parm [es bx] [ax dx] \
modify exact [dx];
#endif
/* ASMAtomicUoAndU64: Should be done by C inline or in external file. */
#undef ASMAtomicUoIncU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicUoIncU32 = \
".486" \
"mov edx, 1" \
"xadd es:[bx], edx" \
"inc edx" \
"mov ax, dx" \
"shr edx, 16" \
parm [es bx] \
value [ax dx] \
modify exact [ax dx];
#endif
#undef ASMAtomicUoDecU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicUoDecU32 = \
".486" \
"mov edx, 0ffffffffh" \
"xadd es:[bx], edx" \
"dec edx" \
"mov ax, dx" \
"shr edx, 16" \
parm [es bx] \
value [ax dx] \
modify exact [ax dx];
#endif
#undef ASMMemZeroPage
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
# pragma aux ASMMemZeroPage = \
"mov cx, 2048" \
"xor ax, ax" \
"rep stosw" \
parm [es di] \
modify exact [ax cx di];
# else
# pragma aux ASMMemZeroPage = \
"mov ecx, 1024" \
"xor eax, eax" \
"rep stosd" \
parm [es di] \
modify exact [ax cx di];
# endif
#endif
#undef ASMMemZero32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
# pragma aux ASMMemZero32 = \
"xor ax, ax" \
"shr cx, 1" \
"shr cx, 1" \
"rep stosw" \
parm [es di] [cx] \
modify exact [ax dx cx di];
# else
# pragma aux ASMMemZero32 = \
"and ecx, 0ffffh" /* probably not necessary, lazy bird should check... */ \
"shr ecx, 2" \
"xor eax, eax" \
"rep stosd" \
parm [es di] [cx] \
modify exact [ax cx di];
# endif
#endif
#undef ASMMemFill32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
# pragma aux ASMMemFill32 = \
" shr cx, 1" \
" shr cx, 1" \
" jz done" \
"again:" \
" stosw" \
" xchg ax, dx" \
" stosw" \
" xchg ax, dx" \
" dec cx" \
" jnz again" \
"done:" \
parm [es di] [cx] [ax dx]\
modify exact [cx di];
# else
# pragma aux ASMMemFill32 = \
"and ecx, 0ffffh" /* probably not necessary, lazy bird should check... */ \
"shr ecx, 2" \
"shl eax, 16" \
"mov ax, dx" \
"rol eax, 16" \
"rep stosd" \
parm [es di] [cx] [ax dx]\
modify exact [ax cx di];
# endif
#endif
#undef ASMProbeReadByte
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMProbeReadByte = \
"mov al, es:[bx]" \
parm [es bx] \
value [al] \
modify exact [al];
#endif
#undef ASMBitSet
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
# pragma aux ASMBitSet = \
" mov ch, cl" /* Only the three lowest bits are relevant due to 64KB segments */ \
" mov cl, 5" \
" shl ch, cl" \
" add bh, ch" /* Adjust the pointer. */ \
" mov cl, al" \
" shr ax, 1" /* convert to byte offset */ \
" shr ax, 1" \
" shr ax, 1" \
" add bx, ax" /* adjust pointer again */\
" and cl, 7" \
" mov al, 1" \
" shl al, cl" /* al=bitmask */ \
" or es:[bx], al" \
parm [es bx] [ax cx] \
modify exact [ax bx cx];
# else
# pragma aux ASMBitSet = \
"shl edx, 16" \
"mov dx, ax" \
"bts es:[bx], edx" \
parm [es bx] [ax dx] \
modify exact [dx];
# endif
#endif
#undef ASMAtomicBitSet
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicBitSet = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"lock bts es:[bx], edx" \
parm [es bx] [ax dx] \
modify exact [dx];
#endif
#undef ASMBitClear
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
# pragma aux ASMBitClear = \
" mov ch, cl" /* Only the three lowest bits are relevant due to 64KB segments */ \
" mov cl, 5" \
" shl ch, cl" \
" add bh, ch" /* Adjust the pointer. */ \
" mov cl, al" \
" shr ax, 1" /* convert to byte offset */ \
" shr ax, 1" \
" shr ax, 1" \
" add bx, ax" /* adjust pointer again */\
" and cl, 7" \
" mov al, 1" \
" shl al, cl" \
" not al" /* al=bitmask */ \
" and es:[bx], al" \
parm [es bx] [ax cx] \
modify exact [ax bx cx];
# else
# pragma aux ASMBitClear = \
"shl edx, 16" \
"mov dx, ax" \
"btr es:[bx], edx" \
parm [es bx] [ax dx] \
modify exact [dx];
# endif
#endif
#undef ASMAtomicBitClear
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicBitClear = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"lock btr es:[bx], edx" \
parm [es bx] [ax dx] \
modify exact [dx];
#endif
#undef ASMBitToggle
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
# pragma aux ASMBitToggle = \
" mov ch, cl" /* Only the three lowest bits are relevant due to 64KB segments */ \
" mov cl, 5" \
" shl ch, cl" \
" add bh, ch" /* Adjust the pointer. */ \
" mov cl, al" \
" shr ax, 1" /* convert to byte offset */ \
" shr ax, 1" \
" shr ax, 1" \
" add bx, ax" /* adjust pointer again */\
" and cl, 7" \
" mov al, 1" \
" shl al, cl" /* al=bitmask */ \
" xor es:[bx], al" \
parm [es bx] [ax cx] \
modify exact [ax bx cx];
# else
# pragma aux ASMBitToggle = \
"shl edx, 16" \
"mov dx, ax" \
"btc es:[bx], edx" \
parm [es bx] [ax dx] \
modify exact [dx];
# endif
#endif
#undef ASMAtomicBitToggle
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicBitToggle = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"lock btc es:[bx], edx" \
parm [es bx] [ax dx] \
modify exact [dx];
#endif
#undef ASMBitTestAndSet
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
# pragma aux ASMBitTestAndSet = \
" mov ch, cl" /* Only the three lowest bits are relevant due to 64KB segments */ \
" mov cl, 5" \
" shl ch, cl" \
" add bh, ch" /* Adjust the pointer. */ \
" mov cl, al" \
" shr ax, 1" /* convert to byte offset */ \
" shr ax, 1" \
" shr ax, 1" \
" add bx, ax" /* adjust pointer again */\
" and cl, 7" /* cl=byte shift count */ \
" mov ah, 1" \
" shl ah, cl" /* ah=bitmask */ \
" mov al, es:[bx]" \
" or ah, al" \
" mov es:[bx], ah" \
" shr al, cl" \
" and al, 1" \
parm [es bx] [ax cx] \
value [al] \
modify exact [ax bx cx];
# else
# pragma aux ASMBitTestAndSet = \
"shl edx, 16" \
"mov dx, ax" \
"bts es:[bx], edx" \
"setc al" \
parm [es bx] [ax dx] \
value [al] \
modify exact [ax dx];
# endif
#endif
#undef ASMAtomicBitTestAndSet
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicBitTestAndSet = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"lock bts es:[bx], edx" \
"setc al" \
parm [es bx] [ax dx] \
value [al] \
modify exact [ax dx];
#endif
#undef ASMBitTestAndClear
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
# pragma aux ASMBitTestAndClear = \
" mov ch, cl" /* Only the three lowest bits are relevant due to 64KB segments */ \
" mov cl, 5" \
" shl ch, cl" \
" add bh, ch" /* Adjust the pointer. */ \
" mov cl, al" \
" shr ax, 1" /* convert to byte offset */ \
" shr ax, 1" \
" shr ax, 1" \
" add bx, ax" /* adjust pointer again */\
" and cl, 7" /* cl=byte shift count */ \
" mov ah, 1" \
" shl ah, cl" \
" not ah" /* ah=bitmask */ \
" mov al, es:[bx]" \
" and ah, al" \
" mov es:[bx], ah" \
" shr al, cl" \
" and al, 1" \
parm [es bx] [ax cx] \
value [al] \
modify exact [ax bx cx];
# else
# pragma aux ASMBitTestAndClear = \
"shl edx, 16" \
"mov dx, ax" \
"btr es:[bx], edx" \
"setc al" \
parm [es bx] [ax dx] \
value [al] \
modify exact [ax dx];
# endif
#endif
#undef ASMAtomicBitTestAndClear
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicBitTestAndClear = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"lock btr es:[bx], edx" \
"setc al" \
parm [es bx] [ax dx] \
value [al] \
modify exact [ax dx];
#endif
#undef ASMBitTestAndToggle
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
# pragma aux ASMBitTestAndToggle = \
" mov ch, cl" /* Only the three lowest bits are relevant due to 64KB segments */ \
" mov cl, 5" \
" shl ch, cl" \
" add bh, ch" /* Adjust the pointer. */ \
" mov cl, al" \
" shr ax, 1" /* convert to byte offset */ \
" shr ax, 1" \
" shr ax, 1" \
" add bx, ax" /* adjust pointer again */\
" and cl, 7" /* cl=byte shift count */ \
" mov ah, 1" \
" shl ah, cl" /* ah=bitmask */ \
" mov al, es:[bx]" \
" xor ah, al" \
" mov es:[bx], ah" \
" shr al, cl" \
" and al, 1" \
parm [es bx] [ax cx] \
value [al] \
modify exact [ax bx cx];
# else
# pragma aux ASMBitTestAndToggle = \
"shl edx, 16" \
"mov dx, ax" \
"btc es:[bx], edx" \
"setc al" \
parm [es bx] [ax dx] \
value [al] \
modify exact [ax dx];
# endif
#endif
#undef ASMAtomicBitTestAndToggle
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMAtomicBitTestAndToggle = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"lock btc es:[bx], edx" \
"setc al" \
parm [es bx] [ax dx] \
value [al] \
modify exact [ax dx];
#endif
#undef ASMBitTest
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
# pragma aux ASMBitTest = \
" mov ch, cl" /* Only the three lowest bits are relevant due to 64KB segments */ \
" mov cl, 5" \
" shl ch, cl" \
" add bh, ch" /* Adjust the pointer. */ \
" mov cl, al" \
" shr ax, 1" /* convert to byte offset */ \
" shr ax, 1" \
" shr ax, 1" \
" add bx, ax" /* adjust pointer again */\
" and cl, 7" \
" mov al, es:[bx]" \
" shr al, cl" \
" and al, 1" \
parm [es bx] [ax cx] \
value [al] \
modify exact [ax bx cx];
# else
# pragma aux ASMBitTest = \
"shl edx, 16" \
"mov dx, ax" \
"bt es:[bx], edx" \
"setc al" \
parm [es bx] [ax dx] nomemory \
value [al] \
modify exact [ax dx] nomemory;
# endif
#endif
/* ASMBitFirstClear: External file. */
/* ASMBitNextClear: External file. */
/* ASMBitFirstSet: External file. */
/* ASMBitNextSet: External file. */
#if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
/* ASMBitFirstSetU32: External file. */
#else
# undef ASMBitFirstSetU32
# ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# pragma aux ASMBitFirstSetU32 = \
"shl edx, 16" \
"mov dx, ax" \
"bsf eax, edx" \
"jz not_found" \
"inc ax" \
"jmp done" \
"not_found:" \
"xor ax, ax" \
"done:" \
parm [ax dx] nomemory \
value [ax] \
modify exact [ax dx] nomemory;
# endif
#endif
#if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
/* ASMBitFirstSetU64: External file. */
#else
# undef ASMBitFirstSetU64
# ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# pragma aux ASMBitFirstSetU64 = \
".386" \
"shl ecx, 16" \
"mov cx, dx" \
"bsf ecx, ecx" \
"jz not_found_low" \
"mov ax, cx" \
"inc ax" \
"jmp done" \
\
"not_found_low:" \
"shr eax, 16" \
"mov ax, bx" \
"bsf eax, eax" \
"jz not_found_high" \
"add ax, 33" \
"jmp done" \
\
"not_found_high:" \
"xor ax, ax" \
"done:" \
parm [dx cx bx ax] nomemory \
value [ax] \
modify exact [ax cx] nomemory;
# endif
#endif
#if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
/* ASMBitFirstSetU16: External file. */
#else
# undef ASMBitFirstSetU16
# ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# pragma aux ASMBitFirstSetU16 = \
"bsf ax, ax" \
"jz not_found" \
"inc ax" \
"jmp done" \
"not_found:" \
"xor ax, ax" \
"done:" \
parm [ax] nomemory \
value [ax] \
modify exact [ax] nomemory;
# endif
#endif
#if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
/* ASMBitLastSetU32: External file. */
#else
# undef ASMBitLastSetU32
# ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# pragma aux ASMBitLastSetU32 = \
"shl edx, 16" \
"mov dx, ax" \
"bsr eax, edx" \
"jz not_found" \
"inc ax" \
"jmp done" \
"not_found:" \
"xor ax, ax" \
"done:" \
parm [ax dx] nomemory \
value [ax] \
modify exact [ax dx] nomemory;
# endif
#endif
#if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
/* ASMBitLastSetU64: External file. */
#else
# undef ASMBitLastSetU64
# ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# pragma aux ASMBitLastSetU64 = \
".386" \
"shl ecx, 16" \
"mov cx, dx" \
"bsf ecx, ecx" \
"jz not_found_low" \
"mov ax, cx" \
"inc ax" \
"jmp done" \
\
"not_found_low:" \
"shr eax, 16" \
"mov ax, bx" \
"bsf eax, eax" \
"jz not_found_high" \
"add ax, 33" \
"jmp done" \
\
"not_found_high:" \
"xor ax, ax" \
"done:" \
parm [dx cx bx ax] nomemory \
value [ax] \
modify exact [ax cx] nomemory;
# endif
#endif
#if defined(__SW_0) || defined(__SW_1) || defined(__SW_2)
/* ASMBitLastSetU16: External file. */
#else
# undef ASMBitLastSetU16
# ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
# pragma aux ASMBitLastSetU16 = \
"bsr ax, ax" \
"jz not_found" \
"inc ax" \
"jmp done" \
"not_found:" \
"xor ax, ax" \
"done:" \
parm [ax] nomemory \
value [ax] \
modify exact [ax] nomemory;
# endif
#endif
#undef ASMByteSwapU16
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMByteSwapU16 = \
"xchg al, ah" \
parm [ax] nomemory \
value [ax] \
modify exact [ax] nomemory;
#endif
#undef ASMByteSwapU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMByteSwapU32 = \
"xchg dh, al" \
"xchg dl, ah" \
parm [ax dx] nomemory \
value [ax dx] \
modify exact [ax dx] nomemory;
#endif
#undef ASMRotateLeftU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMRotateLeftU32 = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"rol edx, cl" \
"mov eax, edx" \
"shr edx, 16" \
parm [ax dx] [cx] nomemory \
value [ax dx] \
modify exact [ax dx] nomemory;
#endif
#undef ASMRotateRightU32
#ifdef IPRT_ASM_WATCOM_X86_16_WITH_PRAGMAS
#pragma aux ASMRotateRightU32 = \
".386" \
"shl edx, 16" \
"mov dx, ax" \
"ror edx, cl" \
"mov eax, edx" \
"shr edx, 16" \
parm [ax dx] [cx] nomemory \
value [ax dx] \
modify exact [ax dx] nomemory;
#endif
#endif /* !IPRT_INCLUDED_asm_watcom_x86_16_h */
|
