From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264044AbTDOT1w (for ); Tue, 15 Apr 2003 15:27:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264045AbTDOT1w (for ); Tue, 15 Apr 2003 15:27:52 -0400 Received: from hermes.fachschaften.tu-muenchen.de ([129.187.202.12]:8915 "HELO hermes.fachschaften.tu-muenchen.de") by vger.kernel.org with SMTP id S264044AbTDOT1u (for ); Tue, 15 Apr 2003 15:27:50 -0400 Date: Tue, 15 Apr 2003 21:39:32 +0200 From: Adrian Bunk To: Robert Love Cc: linux-kernel@vger.kernel.org Subject: Re: [RFC][2.5 patch] K6-II/K6-II: enable X86_USE_3DNOW Message-ID: <20030415193931.GS9640@fs.tum.de> References: <20030414222110.GK9640@fs.tum.de> <1050359780.3664.114.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1050359780.3664.114.camel@localhost> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 14, 2003 at 06:36:20PM -0400, Robert Love wrote: > On Mon, 2003-04-14 at 18:21, Adrian Bunk wrote: > > > If my patch is wrong and this is a RTFM please give me a hint where to > > find the "M". > > Patch looks right... > > > Questions: > > Is it really correct to enable CONFIG_X86_USE_3DNOW? > > If you are right that the K6-2 and K6-3D support 3DNow!, then yes. At > least its "correct" but it may not be optimal: I seem to recall 3DNow > memory copies were not worthwhile on anything before an Athlon. Double > check that, though. It does, but Alan already explained why it doesn't make a difference. > > Is the -march=k6-2 correct? > > Yes. Even if the above is true, splitting the K6 out like this is > useful for the extra -march here. It certainly does not hurt (picking > the original K6 will give proper support for the whole family, in > needed). >>From a quick look of the gcc-3.2.2 sources it seems that except for the 3DNow! support gcc doesn't differenciate between K6 and K6-II, so this change alone doesn't seem to make it worth adding a new processor type. > Robert Love cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed