RE: [patch]K6-2/K-III compile option

Jones D (djones2@glam.ac.uk)
Fri, 1 Oct 1999 17:23:32 +0100

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> > I think there is still room for improvement. '-march=k6'
> > should be a win on all K6's. Also, CONFIG_X86_USE_3DNOW
> > is new and not necessarily mature.
>
> Its the same speed of copy and costs the save overhead. The
> K6 you want to use unrolled integer loops with prefetch and
> prefetchw

Does the original K6 have the 'prefetch' instruction?
When I tried it on mine, it segfaulted.
Or is it a ring0 instruction?

regards,

Dave.

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