Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262451AbVC3WS7 (ORCPT ); Wed, 30 Mar 2005 17:18:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262457AbVC3WS7 (ORCPT ); Wed, 30 Mar 2005 17:18:59 -0500 Received: from 17.red-62-57-106.user.auna.net ([62.57.106.17]:30906 "EHLO pau.newtral.org") by vger.kernel.org with ESMTP id S262451AbVC3WS5 (ORCPT ); Wed, 30 Mar 2005 17:18:57 -0500 Date: Thu, 31 Mar 2005 00:18:55 +0200 (CEST) From: Pau Aliagas X-X-Sender: pau@pau.intranet.ct To: Andi Kleen , linux kernel Cc: binutils@sources.redhat.com Subject: Re: i386/x86_64 segment register issuses (Re: PATCH: Fix x86 segment register access) In-Reply-To: <20050330210801.GA15384@lucon.org> Message-ID: References: <20050326020506.GA8068@lucon.org> <20050327222406.GA6435@lucon.org> <20050330015312.GA27309@lucon.org> <20050330040017.GA29523@lucon.org> <20050330210801.GA15384@lucon.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 890 Lines: 27 On Wed, 30 Mar 2005, H. J. Lu wrote: > On Wed, Mar 30, 2005 at 07:57:28AM -0800, Linus Torvalds wrote: >>> There is no such an instruction of "movl %ds,(%eax)". The old assembler >>> accepts it and turns it into "movw %ds,(%eax)". >> >> I disagree. Violently. As does the old assembler, which does not turn >> "mov" into "movw" as you say. AT ALL. > > I should have made myself clear. By "movw %ds,(%eax)", I meant: > > 8c 18 movw %ds,(%eax) > > That is what the assembler generates, and should have generated, for > "movw %ds,(%eax)" since Nov. 4, 2004. Could this be the reason for the reported slowdown in the last six months? -- Pau - 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/