Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758136AbXLLMgS (ORCPT ); Wed, 12 Dec 2007 07:36:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753216AbXLLMgG (ORCPT ); Wed, 12 Dec 2007 07:36:06 -0500 Received: from aa012msr.fastwebnet.it ([85.18.95.72]:55026 "EHLO aa012msr.fastwebnet.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751411AbXLLMgF (ORCPT ); Wed, 12 Dec 2007 07:36:05 -0500 Date: Wed, 12 Dec 2007 13:35:21 +0100 From: Paolo Ornati To: linux@horizon.com Cc: linux-kernel@vger.kernel.org, rene.herman@gmail.com, linux@horizon.com Subject: Re: [RFT] Port 0x80 I/O speed Message-ID: <20071212133521.2210ca7f@fastwebnet.it> In-Reply-To: <20071212112049.17891.qmail@science.horizon.com> References: <20071212112049.17891.qmail@science.horizon.com> X-Mailer: Claws Mail 3.0.2 (GTK+ 2.12.1; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 664 Lines: 20 On 12 Dec 2007 06:20:49 -0500 linux@horizon.com wrote: > With -O2, the cycle counts come out (before division) as > out: 0xFFFFFFFFFFEA6F4F > in: 0xFFFFFFFFFCE68BB6 > I think the "A" constraint doesn't work quite the same in > 64-bit code. The compiler seems to be using %rdx rather than > %edx:%eax. In another message he says to compile it with "-m32" :) -- Paolo Ornati Linux 2.6.24-rc5-g4af75653 on x86_64 -- 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/