From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out30-119.freemail.mail.aliyun.com (out30-119.freemail.mail.aliyun.com [115.124.30.119]) by sourceware.org (Postfix) with ESMTPS id B4CF5388264E for ; Mon, 27 Mar 2023 09:03:38 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org B4CF5388264E Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=linux.alibaba.com X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R171e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046060;MF=zixuan.wu@linux.alibaba.com;NM=1;PH=DS;RN=1;SR=0;TI=SMTPD_---0VelUaEu_1679907812; Received: from smtpclient.apple(mailfrom:zixuan.wu@linux.alibaba.com fp:SMTPD_---0VelUaEu_1679907812) by smtp.aliyun-inc.com; Mon, 27 Mar 2023 17:03:33 +0800 From: Zeson Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.80.82.1.1\)) Subject: Re: Should -ffp-contract=off the default on GCC? Message-Id: <9D6944F8-0B90-468D-A5DB-CE2BEB6030E0@linux.alibaba.com> Date: Mon, 27 Mar 2023 17:03:31 +0800 To: gcc-patches@gcc.gnu.org X-Mailer: Apple Mail (2.3696.80.82.1.1) X-Spam-Status: No, score=-11.8 required=5.0 tests=BAYES_00,ENV_AND_HDR_SPF_MATCH,KAM_DMARC_STATUS,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS,TXREP,UNPARSEABLE_RELAY,USER_IN_DEF_SPF_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Any update on this thread discussion? And the thread was straying to the = document of option and user-friendly stuff. So does the default value of -ffp-contract=3Dfast obey the C/C++ = language standard? But why does clang not obey? Or is it just compiler = implement-dependent which is not specified by standard? Regards, Zeson=