Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756985AbXIRWpH (ORCPT ); Tue, 18 Sep 2007 18:45:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759857AbXIRWov (ORCPT ); Tue, 18 Sep 2007 18:44:51 -0400 Received: from one.firstfloor.org ([213.235.205.2]:38927 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759540AbXIRWot (ORCPT ); Tue, 18 Sep 2007 18:44:49 -0400 Date: Wed, 19 Sep 2007 00:44:44 +0200 From: Andi Kleen To: Jeremy Fitzhardinge Cc: Andi Kleen , Mathieu Desnoyers , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, "H. Peter Anvin" , Chuck Ebbert , Christoph Hellwig Subject: Re: [patch 4/7] Immediate Values - i386 Optimization Message-ID: <20070918224444.GC5773@one.firstfloor.org> References: <20070918210747.828804366@polymtl.ca> <20070918210853.588573678@polymtl.ca> <46F04856.3010808@goop.org> <46F0515E.2010608@goop.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46F0515E.2010608@goop.org> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 794 Lines: 22 On Tue, Sep 18, 2007 at 03:29:50PM -0700, Jeremy Fitzhardinge wrote: > Andi Kleen wrote: > > Jeremy Fitzhardinge writes: > > > >> It's a pity that gas seems to generate plain 0x90 nops rather than > >> long-nop forms here. I thought it could do that. > >> > > > > .p2align does it > > Just .p2align? Not align, balign, org or skip? Seems... strange. The problem is that you cannot always safely jump into the middle of the longer form nops. So I suppose they didn't risk breakage on older code relying on this. -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/