From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 14257 invoked by alias); 19 Oct 2015 23:51:42 -0000 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 Received: (qmail 14222 invoked by uid 89); 19 Oct 2015 23:51:42 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-0.9 required=5.0 tests=AWL,BAYES_50,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 X-HELO: mail-lb0-f177.google.com Received: from mail-lb0-f177.google.com (HELO mail-lb0-f177.google.com) (209.85.217.177) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-GCM-SHA256 encrypted) ESMTPS; Mon, 19 Oct 2015 23:51:41 +0000 Received: by lbbpp2 with SMTP id pp2so1119392lbb.0 for ; Mon, 19 Oct 2015 16:51:37 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.112.32.72 with SMTP id g8mr75003lbi.22.1445298697660; Mon, 19 Oct 2015 16:51:37 -0700 (PDT) Received: by 10.25.160.73 with HTTP; Mon, 19 Oct 2015 16:51:37 -0700 (PDT) In-Reply-To: <56257F53.2000905@samsung.com> References: <56257F53.2000905@samsung.com> Date: Mon, 19 Oct 2015 23:52:00 -0000 Message-ID: Subject: Re: [PATCH][AArch64] Replace insn to zero up DF register From: Andrew Pinski To: Evandro Menezes Cc: GCC Patches , Marcus Shawcroft , Kyrill Tkachov Content-Type: text/plain; charset=UTF-8 X-IsSubscribed: yes X-SW-Source: 2015-10/txt/msg01810.txt.bz2 On Tue, Oct 20, 2015 at 7:40 AM, Evandro Menezes wrote: > In the existing targets, it seems that it's always faster to zero up a DF > register with "movi %d0, #0" instead of "fmov %d0, xzr". I think for ThunderX 1, this change will not make a difference. So I am neutral on this change. Thanks, Andrew > > This patch modifies the respective pattern. > > Please, commit if it's alright. > > Thank you, > > -- > Evandro Menezes >