Re: [Xen-devel] Ping: [PATCH 0/4] HVM: produce better binary code

[Tim Deegan <tim@xxxxxxx>]

At 08:52 +0100 on 05 Sep (1378371134), Jan Beulich wrote:
> >>> On 04.09.13 at 18:30, Tim Deegan <tim@xxxxxxx> wrote:
> > I'm not certain, on a modern CPU, whether it's better to issue a series
> > of PUSHes or a series of %rsp-relative MOVs and a SUB.
> 
> When I did the push/pop -> mov conversion for the non-HVM code
> I did some measurements, with the result that the sequence of
> moves was never slower but sometimes (usually on older CPUs)
> faster.

Ah, excellent!

Tim.

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