Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750735AbXACMh2 (ORCPT ); Wed, 3 Jan 2007 07:37:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750738AbXACMh2 (ORCPT ); Wed, 3 Jan 2007 07:37:28 -0500 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:35293 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1750735AbXACMh1 (ORCPT ); Wed, 3 Jan 2007 07:37:27 -0500 Date: Wed, 3 Jan 2007 12:44:10 +0000 From: Alan To: Grzegorz Kulewski Cc: Mikael Pettersson , s0348365@sms.ed.ac.uk, torvalds@osdl.org, 76306.1226@compuserve.com, akpm@osdl.org, bunk@stusta.de, greg@kroah.com, linux-kernel@vger.kernel.org, yanmin_zhang@linux.intel.com Subject: Re: kernel + gcc 4.1 = several problems Message-ID: <20070103124410.4cb191dd@localhost.localdomain> In-Reply-To: References: <200701030212.l032CDXe015365@harpo.it.uu.se> <20070103102944.09e81786@localhost.localdomain> X-Mailer: Sylpheed-Claws 2.6.0 (GTK+ 2.10.4; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 677 Lines: 18 > > fixed. At that point an i686 kernel would contain i686 instructions and > > actually run on all i686 processors ending all the i586 pain for most > > users and distributions. > > Could you explain why CMOV is pointless now? Are there any benchmarks > proving that? Take a look at the recent ffmpeg bits on the mplayer list for one example I have to hand - P4 cmov is pretty slow. The crypto folks find the same things. Alan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/