Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932139AbXACWML (ORCPT ); Wed, 3 Jan 2007 17:12:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932150AbXACWML (ORCPT ); Wed, 3 Jan 2007 17:12:11 -0500 Received: from smtp.osdl.org ([65.172.181.25]:54946 "EHLO smtp.osdl.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932139AbXACWMK (ORCPT ); Wed, 3 Jan 2007 17:12:10 -0500 Date: Wed, 3 Jan 2007 14:08:17 -0800 (PST) From: Linus Torvalds To: Thomas Sailer cc: Grzegorz Kulewski , Alan , Mikael Pettersson , s0348365@sms.ed.ac.uk, 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 In-Reply-To: <1167860659.13394.41.camel@unreal> Message-ID: References: <200701030212.l032CDXe015365@harpo.it.uu.se> <20070103102944.09e81786@localhost.localdomain> <1167860659.13394.41.camel@unreal> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 698 Lines: 20 On Wed, 3 Jan 2007, Thomas Sailer wrote: > > IF... Counterexample: Add-Compare-Select in a Viterbi Decoder. Yes. [De]compression stuff tends to be (a) totally unpredictable and (b) a situation where people care about performance. It's fairly rare in many other situations. That said, any real performance these days is about avoiding cache misses. There cmov really can help more, if it results in denser code (fairly big if, though). Linus - 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/