Gentoo Archives: gentoo-user

From: "J. Roeleveld" <joost@××××××××.org>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Re: i486
Date: Wed, 24 Nov 2010 10:29:17
Message-Id: 201011241129.00745.joost@antarean.org
In Reply to: Re: [gentoo-user] Re: i486 by Neil Bothwick
1 On Wednesday 24 November 2010 11:23:48 Neil Bothwick wrote:
2 > On Tue, 23 Nov 2010 22:53:02 +0000, David W Noon wrote:
3 > > >Apparently it's not quite a full i686. The research I did at the time
4 > > >indicated that using anything higher than i486 was asking for
5 > > >problems.
6 > >
7 > > I am a little surprised by that. I ran a couple of K6-3 boxes for some
8 > > few years using i586. As near as I could tell, those processors only
9 > > lacked CMOV instructions when compared with i686. I find it hard to
10 > > envisage the Geode lacking any i586 feature, given that it has MMX
11 > > instructions, CMOV instructions, the CMPXCHG8B instruction and a TSC
12 > > register -- all of those are way beyond i486.
13 >
14 > AFAIR is does implement the full i586 set, but some of it badly, so i486
15 > gives better performance... but don't ask me to do an emerge -e world on
16 > that box to check it out b:(
17
18 Tempting.... but.... no, I won't make you do it ;)
19
20 --
21 Joost