22:
345:
157:
This flag is used to determine the direction ('forward' or 'backward') in which several bytes of data will be copied from one place in the
338:
105:
161:, to another. The direction is important mainly when the original data position in memory and the target data position overlap.
39:
386:
177:
86:
43:
58:
331:
65:
32:
567:
442:
135:
72:
541:
411:
371:
214:
166:
536:
54:
460:
401:
311:
436:
531:
448:
366:
189:
79:
526:
454:
381:
516:
499:
484:
419:
396:
253:
173:
139:
561:
504:
430:
151:
391:
376:
300:
185:
21:
489:
479:
123:
509:
203:) — the string is processed from highest to lowest address. This is called
172:) — it means that string is processed beginning from lowest to highest
323:
521:
199:
In case it is set to 1 (using the set-direction-flag instruction
424:
315:
327:
546:
158:
147:
143:
15:
470:
410:
359:
301:
3.8.1 Carry and
Direction Flag Control Instructions
46:. Unsourced material may be challenged and removed.
165:If it is set to 0 (using the clear-direction-flag
339:
8:
346:
332:
324:
106:Learn how and when to remove this message
210:
293:
7:
44:adding citations to reliable sources
14:
20:
31:needs additional citations for
387:Low-level programming language
1:
584:
274:highest-to-lowest address
138:processing, stored in the
443:Microsoft Macro Assembler
224:
221:
218:
213:
372:Comparison of assemblers
461:Open Watcom Assembler
402:x86 assembly language
246:clear direction flag
232:of string processing
196:) will increase them;
542:Instruction listings
40:improve this article
537:Calling conventions
437:High Level Assembly
354:x86 assembly topics
268:set direction flag
532:Processor register
258:auto-incrementing
252:lowest-to-highest
126:that controls the
555:
554:
449:Netwide Assembler
367:Assembly language
285:
284:
205:auto-decrementing
190:destination index
182:auto-incrementing
116:
115:
108:
90:
575:
568:X86 architecture
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171:
111:
104:
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89:
55:"Direction flag"
48:
24:
16:
583:
582:
578:
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572:
558:
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551:
527:Program counter
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466:
455:Turbo Assembler
406:
382:Instruction set
355:
352:
322:
321:
310:
306:
299:
295:
290:
263:
241:
215:x86-instruction
200:
193:
184:mode. Both the
180:mode is called
169:
112:
101:
95:
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49:
47:
37:
25:
12:
11:
5:
581:
579:
571:
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550:
549:
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539:
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529:
524:
519:
517:Memory address
514:
513:
512:
507:
502:
500:Interrupt flag
497:
495:Direction flag
492:
482:
476:
474:
468:
467:
465:
464:
458:
452:
446:
440:
434:
428:
425:Flat Assembler
422:
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408:
407:
405:
404:
399:
397:Microassembler
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389:
384:
379:
374:
369:
363:
361:
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351:
350:
343:
336:
328:
320:
319:
312:Direction Flag
304:
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282:
275:
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269:
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256:
250:
247:
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238:
237:
234:
227:
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223:
220:
217:
209:
208:
197:
140:FLAGS register
120:direction flag
114:
113:
28:
26:
19:
13:
10:
9:
6:
4:
3:
2:
580:
569:
566:
565:
563:
548:
545:
543:
540:
538:
535:
533:
530:
528:
525:
523:
520:
518:
515:
511:
508:
506:
505:Overflow flag
503:
501:
498:
496:
493:
491:
488:
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486:
483:
481:
478:
477:
475:
469:
462:
459:
456:
453:
450:
447:
444:
441:
438:
435:
432:
431:GNU Assembler
429:
426:
423:
421:
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417:
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403:
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390:
388:
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365:
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358:
349:
344:
342:
337:
335:
330:
329:
326:
317:
313:
308:
305:
302:
297:
294:
287:
281:decrementing
280:
276:
273:
270:
267:
262:
261:
257:
255:
251:
248:
245:
240:
239:
235:
233:
229:
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216:
212:
206:
198:
191:
187:
183:
179:
175:
168:
164:
163:
162:
160:
155:
153:
149:
145:
141:
137:
134:direction of
133:
132:right-to-left
129:
128:left-to-right
125:
121:
110:
107:
99:
96:December 2018
88:
85:
81:
78:
74:
71:
67:
64:
60:
57: –
56:
52:
51:Find sources:
45:
41:
35:
34:
29:This article
27:
23:
18:
17:
494:
392:Machine code
377:Disassembler
307:
296:
278:
231:
204:
186:source index
181:
178:instructions
156:
146:-compatible
131:
127:
119:
117:
102:
93:
83:
76:
69:
62:
50:
38:Please help
33:verification
30:
471:Programming
236:Mode title
167:instruction
490:Carry flag
480:Call stack
412:Assemblers
288:References
230:Direction
152:bit number
66:newspapers
547:Registers
510:Zero flag
150:. It is
562:Category
420:A86/A386
219:Meaning
254:address
176:; such
174:address
142:on all
80:scholar
522:Opcode
473:issues
463:(WASM)
457:(TASM)
451:(NASM)
445:(MASM)
427:(FASM)
360:Topics
225:Notes
192:(like
159:memory
136:string
82:
75:
68:
61:
53:
485:Flags
439:(HLA)
433:(GAS)
222:Flag
207:mode.
122:is a
87:JSTOR
73:books
316:MSDN
277:auto
194:MOVS
188:and
154:10.
148:CPUs
124:flag
118:The
59:news
314:at
264:STD
242:CLD
201:STD
170:CLD
144:x86
130:or
42:by
564::
271:1
249:0
347:e
340:t
333:v
279:-
109:)
103:(
98:)
94:(
84:·
77:·
70:·
63:·
36:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
