From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934605AbYETWro (ORCPT ); Tue, 20 May 2008 18:47:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754323AbYETWr2 (ORCPT ); Tue, 20 May 2008 18:47:28 -0400 Received: from cantor2.suse.de ([195.135.220.15]:42997 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761346AbYETWr0 (ORCPT ); Tue, 20 May 2008 18:47:26 -0400 From: Andreas Schwab To: Trent Piepho Cc: linuxppc-dev@ozlabs.org, Scott Wood , linux-kernel@vger.kernel.org Subject: Re: [PATCH] [POWERPC] Improve (in|out)_beXX() asm code References: <1211316025-29069-1-git-send-email-tpiepho@freescale.com> X-Yow: I'd like TRAINED SEALS and a CONVERTIBLE on my doorstep by NOON!! Date: Wed, 21 May 2008 00:47:23 +0200 In-Reply-To: (Trent Piepho's message of "Tue, 20 May 2008 15:11:02 -0700 (PDT)") Message-ID: User-Agent: Gnus/5.110009 (No Gnus v0.9) Emacs/22.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Trent Piepho writes: > It's the _le versions that have a problem, since we can't get gcc to just use > the register indexed mode. It seems like an obvious thing to have a > constraint for, but I guess there weren't enough instructions that only come > in 'x' versions to bother with it. There is a 'Z' constraint, "Memory operand > that is an indexed or indirect from a register", but I tried it and it can use > both "rb,ri" and "disp(rb)" forms. Actually, I'm not sure how 'Z' is any > different than "m"? 'Z' will never emit a non-zero constant displacement. Andreas. -- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."