From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 4452 invoked by alias); 16 Sep 2013 15:25:00 -0000 Mailing-List: contact libc-ports-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: libc-ports-owner@sourceware.org Received: (qmail 4441 invoked by uid 89); 16 Sep 2013 15:25:00 -0000 Received: from relay1.mentorg.com (HELO relay1.mentorg.com) (192.94.38.131) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 16 Sep 2013 15:25:00 +0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.7 required=5.0 tests=AWL,BAYES_00,KHOP_THREADED,RDNS_NONE,SPF_HELO_FAIL autolearn=no version=3.3.2 X-HELO: relay1.mentorg.com Received: from svr-orw-fem-01.mgc.mentorg.com ([147.34.98.93]) by relay1.mentorg.com with esmtp id 1VLafX-0002wx-Bo from joseph_myers@mentor.com ; Mon, 16 Sep 2013 08:24:55 -0700 Received: from SVR-IES-FEM-01.mgc.mentorg.com ([137.202.0.104]) by svr-orw-fem-01.mgc.mentorg.com over TLS secured channel with Microsoft SMTPSVC(6.0.3790.4675); Mon, 16 Sep 2013 08:24:54 -0700 Received: from digraph.polyomino.org.uk (137.202.0.76) by SVR-IES-FEM-01.mgc.mentorg.com (137.202.0.104) with Microsoft SMTP Server id 14.2.247.3; Mon, 16 Sep 2013 16:24:52 +0100 Received: from jsm28 (helo=localhost) by digraph.polyomino.org.uk with local-esmtp (Exim 4.76) (envelope-from ) id 1VLafT-0006SO-NB; Mon, 16 Sep 2013 15:24:51 +0000 Date: Mon, 16 Sep 2013 15:25:00 -0000 From: "Joseph S. Myers" To: Will Newton CC: , Subject: Re: [PATCH v4] ARM: Improve armv7 memcpy performance. In-Reply-To: <5236C33A.7080802@linaro.org> Message-ID: References: <5236C33A.7080802@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-SW-Source: 2013-09/txt/msg00095.txt.bz2 On Mon, 16 Sep 2013, Will Newton wrote: > Only enter the aligned copy loop with buffers that can be 8-byte > aligned. This improves performance slightly on Cortex-A9 and > Cortex-A15 cores for large copies with buffers that are 4-byte > aligned but not 8-byte aligned. > > ports/ChangeLog.arm: > > 2013-08-30 Will Newton > > * sysdeps/arm/armv7/multiarch/memcpy_impl.S: Tighten check > on entry to aligned copy loop to improve performance. OK. -- Joseph S. Myers joseph@codesourcery.com