Message-ID: <4AF886D4.1080108@zytor.com>
Date: Mon, 09 Nov 2009 13:17:08 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>
CC: Matteo Croce <technoboy85@gmail.com>, Ingo Molnar <mingo@elte.hu>,
       linux-kernel@vger.kernel.org
Subject: Re: i686 quirk for AMD Geode
References: <40101cc30910021912r17b3a08bue1b9412e4fa47d89@mail.gmail.com> <20091003072127.GC21407@elte.hu> <40101cc30911060659k7b3b6428ob1340e476bdbac5b@mail.gmail.com> <4AF4526B.4060101@zytor.com> <40101cc30911081042n93e268bs66b9436a0174a19a@mail.gmail.com> <20091109201608.GD15159@caffeine.csclub.uwaterloo.ca>
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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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