pixman with and without SSE2 benchmarks?

Stefan Dirsch sndirsch at suse.de
Mon Sep 29 10:27:01 PDT 2008


On Mon, Sep 29, 2008 at 06:17:53PM +0200, Matthias Hopf wrote:
> On Sep 28, 08 16:53:05 +0200, Roland Scheidegger wrote:
> > On 28.09.2008 11:52, Clemens Eisserer wrote:
> > >> I'd bet against that :-). Core 2 has magnificent SSE performance indeed,
> > >> but that's true for MMX just as well.
> > > Well, Core2 (and AMD K10) got support for 128bit operations per clock,
> > > whereas previous processors only supported 64bit at once, and took 2
> > > cycles for 128 bit operations.
> > > MMX is just 64-bit, so it should't matter much there.
> > Ah yes you're right. Somehow I thought it would execute mmx twice as
> > fast as well - clearly that's not true. Should indeed be much closer on
> > older cpus.
> 
> OTOH pixman w/ SSE does have some severe rendering issues - read
> bugzilla.novell.org, #426370.

bugzilla.novell.com

Best regards,
Stefan

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