From: kloeri@gentoo.org
To: gentoo-alpha@lists.gentoo.org
Subject: Re: [gentoo-alpha] ev6, ev67 or ev68?
Date: Mon, 19 Sep 2005 21:35:17 +0200 [thread overview]
Message-ID: <20050919193517.GA1968@kloeri> (raw)
In-Reply-To: <8CAF9929-E3FA-485D-915C-5CF681FD6E9A@gmail.com>
On Mon, Sep 19, 2005 at 08:38:04PM +0200, Davide Cittaro wrote:
> On a DS25, with ev68 CPU, I cannot set -mcpu=ev68 as CFLAGS, because
> that option is not supported. Should I set it to ev6 or to ev67 then?
> Which is the main difference in that?
> If I set no -mcpu option I have problems since the g++ compiler seems
> to work not properly.
>
> Thanks
>
Using -mcpu=ev67 is fine. ev68 doesn't support any new instructions
afaik and scheduling is similar as well. If you decide to use -mcpu=ev6
you're going to miss the CIX instruction set and probably suffer
(somewhat) lower performance.
Regards,
Bryan Østergaard
--
gentoo-alpha@gentoo.org mailing list
prev parent reply other threads:[~2005-09-19 19:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-19 18:38 [gentoo-alpha] ev6, ev67 or ev68? Davide Cittaro
2005-09-19 19:35 ` kloeri [this message]
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