From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keir Fraser Subject: Re: [PATCH] x86_emulate adjustments Date: Fri, 05 Jan 2007 15:04:53 +0000 Message-ID: References: <459E73C8.76E4.0078.0@novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <459E73C8.76E4.0078.0@novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Jan Beulich Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On 5/1/07 14:50, "Jan Beulich" 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