From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754097AbXGUXDT (ORCPT ); Sat, 21 Jul 2007 19:03:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750909AbXGUXDI (ORCPT ); Sat, 21 Jul 2007 19:03:08 -0400 Received: from barikada.upol.cz ([158.194.242.200]:56369 "EHLO barikada.upol.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750855AbXGUXDH (ORCPT ); Sat, 21 Jul 2007 19:03:07 -0400 To: Andi Kleen Cc: jh@suse.cz, patches@x86-64.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] [9/58] x86_64: Always use builtin memcpy on gcc 4.3 In-Reply-To: <20070719095453.5434214E04@wotan.suse.de> References: <200707191154.642492000@suse.de> <20070719095453.5434214E04@wotan.suse.de> Date: Sun, 22 Jul 2007 01:16:42 +0200 Message-Id: From: Oleg Verych Organization: Palacky University in Olomouc, experimental physics department X-OS: x86_64-pc-linux-glibc-debian Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * From: Andi Kleen * Date: Thu, 19 Jul 2007 11:54:53 +0200 (CEST) > > Jan asked to always use the builtin memcpy on gcc 4.3 mainline because > it should generate better code than the old macro. Let's try it. Unfortunately such info is hard to find. The discuss@x86-64 list is empty. So, let me ask how this memcpy relates to recently submitted for glibc one [0]? [0] Also you are enabling rep. string operations for 10h family. Yet manual says, that while they were improved, there are still various other preferred optimization cases Thanks. > Cc: jh@suse.cz > > Signed-off-by: Andi Kleen > > --- > include/asm-x86_64/string.h | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) ____