in some source, i see any jump or call use like this :

cmp xxx, xxx
jmp @ -----> tell me about it

cmp xxx, xxx
je @@b ----> tell me about it

or
call @

any could tell me !!!
thanks
Posted on 2003-03-20 21:27:06 by irwan
The @F and @B are used to reference an anonymous label, an anonymous label is identified by @@:. In some parts of your code it can be cumbersome to have named labels for simple forward or backward jmp commands, @F references the next occurance of @@: and @B references the previous one:

jmp @F ; jumps ahead to the next @@: label

nop
nop

@@: ; both of the jmp calls end up here

nop
nop

jmp @B ; jumps back to the previous @@: label
Posted on 2003-03-20 22:15:19 by donkey
Exactly right.
jmp @F will jump FORWARDS to the FIRST INSTANCE of a @@: label.
jmp @B will jump BACKWARDS to the FIRST INSTANCE of a @@: label.

therefore you may wish to think of them as
jmp @F= jmp to NEXT @@:
jmp @B=jmp to PREV @@:
Posted on 2003-03-20 23:02:57 by Homer
@@:
....
....
....
@@:
......
......
jmp @B
jmp @B


how can i do this one using @@ @F @B ???? (i means nested loops)
Posted on 2003-03-21 16:50:25 by AceEmbler
Afternoon, AceEmbler.

You can't.

Usually, you'd use @f to jump *out* of a loop, and @b to loop *back*.

Cheers,
Scronty
Posted on 2003-03-21 18:19:12 by Scronty