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Re: [Xen-devel] [PATCH v6 09/16] x86/hvm: limit reps to avoid the need to handle retry

>>> On 09.07.15 at 16:00, <Paul.Durrant@xxxxxxxxxx> wrote:
> So, the only significant difference I can see is that using a signed value 
> causes an extra cltq instruction to be used. Or maybe I need some specific 
> level of optimization for there to be a big difference?

No, this is the difference I'm trying to point out (and if the index
register wasn't %rax, it would be a movslq or whatever its AT&T
name is).


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