linux-kernel - Re: i686 quirk for AMD Geode

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Message-ID: <4AF886D4.1080108@zytor.com>
Date:	Mon, 09 Nov 2009 13:17:08 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>
CC:	Matteo Croce <technoboy85@...il.com>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org
Subject: Re: i686 quirk for AMD Geode

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
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