Re: [Xen-devel] [PATCH] x86_emulate adjustments

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 5/1/07 14:50, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> Okay, I view this differently - if CPUs always behaved a certain way (i.e.
> REPNE
> and REPE being interchangeable as long as the instruction doesn't involve a
> comparison) or if behavior is clearly defined (REX followed by non-REX prefix,
> where the REX then simply has no effect), the decoder should behave as real
> hardware would.

Okay, I didn't realise the latter was defined behaviour but it does indeed
appear to be. And the REPE/REPNE thing makes sense.

 Thanks,
 Keir


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