.
. .
, : ecx/cx zf:
rep (REPeat). , - , movs stos.
rep , ecx/cx 0.
, , ecx/cx . , , ;
repe repz (REPeat while Equal or Zero). .
, ecx/cx zf 1.
, . zf, cmps scas .
repne repnz (REPeat while Not Equal or Zero). . repe/repz. repne/repnz , ecx/cx zf .
.
cmps scas, .
, , _ _.
-, _, , ds.
-, _, , es.
, ( ) ds, es .
- .
- esi/si (Source Index register ).
- edi/di (Destination Index register - ).
, :
_ ds:esi/si;
_ es:edi/di.
, , , -, .
, .
, . .
, . , , , , .
, , . , , .
|
|
, , . :
, ;
, .
, , , . , , . df (Direction Flag) eflags/flags:
df = 0, esi/si edi/di ( ) , ;
df = 1, esi/si edi/di ( ) , .
df , :
cld (Clear Direction Flag) . df 0.
std (Set Direction Flag) . df 1.
, . - , . . , , .