Re: i686 quirk for AMD Geode

H. Peter Anvin
2009-11-09T21:17:13Z

On 11/09/2009 12:16 PM, Lennart Sorensen wrote:
>
> The Geode LX is what is being discussed which is in fact mostly a K6 as
> far as I understand things. It seems to like i686 code, other than
> apparently those NOP instructions. I wonder if the K6 has those noop
> instructions and if not, perhaps gcc 4.4's -march=k6-3 would be the
> right choice. I have always suspected the LX was really a K6-3 based
> design (the cache sizes are a bit different, but clock speeds and
> instruction sets seem to match).
>
> The Geode NX (which no one has mentioned yet) is an Athlon derived chip.
>

*As far as I know* K6 didn't have NOPL, whereas K7 does.

Someone who has access to these chips could run that as an experiment.

-hpa