From: Keir Fraser <keir@xensource.com>
To: Jan Beulich <jbeulich@novell.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: [PATCH] x86_emulate adjustments
Date: Fri, 05 Jan 2007 15:04:53 +0000 [thread overview]
Message-ID: <C1C41995.7285%keir@xensource.com> (raw)
In-Reply-To: <459E73C8.76E4.0078.0@novell.com>
On 5/1/07 14:50, "Jan Beulich" <jbeulich@novell.com> 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
prev parent reply other threads:[~2007-01-05 15:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-05 10:03 [PATCH] x86_emulate adjustments Jan Beulich
2007-01-05 11:25 ` Keir Fraser
2007-01-05 11:57 ` Jan Beulich
2007-01-05 12:05 ` Keir Fraser
2007-01-05 14:34 ` Keir Fraser
2007-01-05 14:50 ` Jan Beulich
2007-01-05 15:04 ` Keir Fraser [this message]
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