Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760461AbXLLTcT (ORCPT ); Wed, 12 Dec 2007 14:32:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752440AbXLLTcK (ORCPT ); Wed, 12 Dec 2007 14:32:10 -0500 Received: from one.firstfloor.org ([213.235.205.2]:40502 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751160AbXLLTcJ (ORCPT ); Wed, 12 Dec 2007 14:32:09 -0500 Date: Wed, 12 Dec 2007 20:32:13 +0100 From: Andi Kleen To: "H. Peter Anvin" Cc: Kyle McMartin , Rene Herman , Linux Kernel , dpreed@reed.com, Alan Cox , pavel@ucw.cz, andi@firstfloor.org, rol@as2917.net, Krzysztof Halasa , david@davidnewall.com, john@stoffel.org, linux-os@analogic.com Subject: Re: [RFT] Port 0x80 I/O speed Message-ID: <20071212193213.GF21864@one.firstfloor.org> References: <475F1DC6.5090403@keyaccess.nl> <20071212052304.GB20883@fattire.cabal.ca> <476035C0.1040708@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <476035C0.1040708@zytor.com> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 554 Lines: 13 > "=A" works on 32-bit systems (only), obviously, and gcc will generally > produce slightly better code as a result (gcc could really use a > register renaming/copy propagation step *after* multi-register entities I believe gcc 4.3 (or maybe 4.2) does that already -- it splits them much earlier. -Andi -- 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/