From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9018 invoked by alias); 15 Nov 2011 11:54:15 -0000 Received: (qmail 8997 invoked by uid 22791); 15 Nov 2011 11:54:13 -0000 X-SWARE-Spam-Status: No, hits=-2.2 required=5.0 tests=AWL,BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,TW_ZJ X-Spam-Check-By: sourceware.org Received: from mail-iy0-f175.google.com (HELO mail-iy0-f175.google.com) (209.85.210.175) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 15 Nov 2011 11:53:52 +0000 Received: by iahk25 with SMTP id k25so8055584iah.20 for ; Tue, 15 Nov 2011 03:53:51 -0800 (PST) MIME-Version: 1.0 Received: by 10.231.69.146 with SMTP id z18mr6200506ibi.79.1321358031705; Tue, 15 Nov 2011 03:53:51 -0800 (PST) Received: by 10.231.200.131 with HTTP; Tue, 15 Nov 2011 03:53:51 -0800 (PST) In-Reply-To: References: Date: Tue, 15 Nov 2011 15:28:00 -0000 Message-ID: Subject: Re: GCC 4.7.0 Status Report (2011-10-27), Stage 1 will end Nov 7th From: Michael Zolotukhin To: Uros Bizjak Cc: GCC Development , Richard Guenther , Jan Hubicka , gcc-patches@gcc.gnu.org, Jakub Jelinek , "Joseph S. Myers" Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org X-SW-Source: 2011-11/txt/msg01722.txt.bz2 Hello! x86-specific part of this patch was committed to the trunk recently. There is also target-independent part, which covers memset/memcopy for the smallest sizes (from 1 to ~256 bytes). In contrast to existing implementation, it has a cost model to choose the fastest move-mode (which could be a vector move-mode). This helps to increase the performance on small sizes - these cases are especially important, because libcalls can't be efficiently used here due to call overheads. Could anyone from middle-end maintainers review it, when I updated it to the latest changes? Thanks! On 27 October 2011 17:24, Uros Bizjak wrote: > Hello! > >> The GCC trunk is still in stage1. =A0Stage1 will last until >> Nov 7th (including, use your timezone to your advantage) after >> which we will have been in stage1 for nearth 8 months. >> In stage3 the trunk will be open for general bugfixing, no >> new features will be accepted. > > There is a patch that implements usage of vector instructions in > memmov/memset expanding [1]. The patch was not reviewed for quite some > time, but IIRC, we said that patches that were submitted before Stage > 1 closes are still eligible for later stages (after a review of > course). > > I think that this feature certainly improves gcc (also taking into > account recent glibc changes in this area), and IMO implements an > important feature for recent processors. I would like to motivate > middle-end and target maintainers to consider the patch for a review > before stage 1 closes, and ultimately ask Release Managers to decide > how to proceed with this patch. > > [1] http://gcc.gnu.org/ml/gcc-patches/2011-10/msg02392.html > > Thanks, > Uros. > --=20 --- Best regards, Michael V. Zolotukhin, Software Engineer Intel Corporation.