From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-4.1 required=3.0 tests=AWL,BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 11C4720248 for ; Thu, 14 Mar 2019 13:52:42 +0000 (UTC) DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:from:to:cc:subject:date:message-id :content-type:content-transfer-encoding:mime-version; q=dns; s= default; b=A+8GXLVTOpmSWCDTxyrjztgttRsWT8eGTIQ4wyM0pDkgbJf5sk6hw 03zWD4vTBH/Wc9gy512IFACyN0PZr8boVaQsn9ZWQkt85GQGgZikCUhTLAfnPjSN wdaXB4CIaNuLdLOXL/IjGPZlWyi2jvmdHv3j/LqJtYsNvg2/oes1rw= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:from:to:cc:subject:date:message-id :content-type:content-transfer-encoding:mime-version; s=default; bh=+LJEqHepyWyQ74fBSvAqyNtDve0=; b=FgGW/uGqoujZmHTVsFwgBkUQF8kA grycKTrY1+ISc0mvVaZF6D2q9GmMDr2n/LpjWlx9+f1uqlKyhtBefsSfUMjrDLRY R51kNOydxhWtqZlHMF3t0YLWfds5mc5vgCWJl5z86bjA9DemWcnVamYY/ALALhWq H4WwpddymXCj5sc= Received: (qmail 25755 invoked by alias); 14 Mar 2019 13:52:35 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Received: (qmail 25707 invoked by uid 89); 14 Mar 2019 13:52:34 -0000 Authentication-Results: sourceware.org; auth=none X-HELO: EUR03-AM5-obe.outbound.protection.outlook.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector1-arm-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=9hoF1oBySg/dZQ0Q7Lo73fjWj918wWd1QgUNilK3Lr8=; b=P7ojiJ+8w3ovSO8N2/YWSa57/K+irOUFh/0XbRJb4xu1h6YZYDBv4IGaBH1AsOupIBQbAxAJoKb+pIlTVlNdMG7mq8uClgPZzuJ13e7OUmC8eHmn+nZsu3izLcs1BVCuhTvDaKYavWJc2byRS1SNTduJ+7HH79472xNHukYIIjk= From: Wilco Dijkstra To: Szabolcs Nagy , Joseph Myers , "Ellcey, Steve" , "libc-alpha@sourceware.org" CC: nd Subject: Re: RFC: Patch to avoid using _finite calls in some cases (including in libmvec names) Date: Thu, 14 Mar 2019 13:52:29 +0000 Message-ID: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Wilco.Dijkstra@arm.com; received-spf: None (protection.outlook.com: arm.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED Hi, Clearly the best solution is to remove all finite renaming. Over the past y= ears we've removed a lot of unnecessary inlines, redirects and other nasty hacks from GLIBC. GCC now sees the original functions and as a result can optimiz= e far better. This is just one of the last few remaining header hacks. We use no veneers in the new optimized math functions and as a result they = are significantly faster, so there is no argument that the finite variants are = useful or improve performance. It is better to handle special cases in the main code = rather than=A0do them in a veneer=A0and thus need to check them twice... So I believe we should be bold and go ahead with disabling the header compl= etely. Wilco