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Subject: Re: 64 Bit Programs

Author: Bo Persson

Date: 02:01:54 07/04/03

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On July 03, 2003 at 19:20:04, Robert Hyatt wrote:

>
>
>The "instruction width" on the X86 is pretty much irrelevant.  One byte up
>for instructions.  I have no idea what the longest instruction is on the X86
>as I don't count the bytes although I'm sure I could find out.

Theoretically there is no limit, because you can have multiple redundant prefix
bytes (lock, segment override, operand size override, address size override,
:-). You will get a bad-instruction interrupt if the decoder hasn't got a
completed instruction after 10 bytes.


Bo Persson
bop2@telia.com



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