assembly - Difference between long and short jump (x86) -

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i've read short jumps used when the relative jump less 124 in address, , long jumps should used otherwise.

what difference in terms of operations performed in cpu / performance between 2 types of jumps on x86?

there 3 types of jmp instructions; short, near , far (long).

a short jmp relative jmp refer to. encoded 2 bytes; actual jmp , number of bytes +/- relative current ip.

a near jump allows jump within current "segment" (using real mode terms) or within selected memory area in cs selector.

a long or far jmp additionally includes selector (or segment in real mode)

you can timings yourself. biggest difference related time caused different numbers of bytes must read accomplish jmp.


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