220 37631 <6eb497fe-8297-48b0-9ee9-112b6ce94580@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: Bengt Gustafsson Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Why do we need `volatile` in C++? Date: Tue, 3 Apr 2018 21:50:51 -0700 (PDT) Lines: 23 Approved: news@gmane.org Message-ID: <6eb497fe-8297-48b0-9ee9-112b6ce94580@isocpp.org> References: <044dfdd3-2313-4ce3-a5e2-3a23c1c0d678@isocpp.org> <9bc32039-04fe-42cd-abc4-49040cf3a6dc@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_24953_2110069976.1522817451418" X-Trace: blaine.gmane.org 1522817328 2568 195.159.176.226 (4 Apr 2018 04:48:48 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 4 Apr 2018 04:48:48 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCRIRSPDTQIRBLFTSHLAKGQEWIBJ66A@isocpp.org Wed Apr 04 06:48:44 2018 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ua0-f200.google.com ([209.85.217.200]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1f3aLk-0000Ze-Dk for gclcip-std-proposals@m.gmane.org; Wed, 04 Apr 2018 06:48:44 +0200 Original-Received: by mail-ua0-f200.google.com with SMTP id y5sf15792013uaa.15 for ; Tue, 03 Apr 2018 21:50:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=/n/XIgLADjf1k5KJ9rgb9Up1wDgdn/xJ1ZdH/cprGDc=; b=urC1+3bYXMemecRr0T/Rzl0eTOQdcfeAfLeNMIolyeu+eWECwnurf4w3xaTWuwm2JL 7UhnqdwizbruLbb037G4JYGmqvzQ/+eeAy3XJPPUhf598ZB61LCEz1K4SZfTPRagWN12 yB0XduCeEsajOc0Ijb6yd/bIrcca7J9Nyorwk8B2tQ6XmIDDbc/f3pDqo7WJYIFaTT6V yl4HSV6yyXLnrDlnmSf551iv0WDQEI7LhqxhEg5PdWL6Ow2kC7zW3j5axAfGjqqnr38w dmh04+1buR7wTxcE05b4L2J/TdDX9iu4MJLk7Ia3DRkq7W8AcvKKojnDFh8WjEQQT7nB WwKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:x-original-sender:reply-to:precedence :mailing-list:list-id:x-spam-checked-in-group:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=/n/XIgLADjf1k5KJ9rgb9Up1wDgdn/xJ1ZdH/cprGDc=; b=sZIzqzENt7yNWbkPBmT30j6yYTuGt2XZg1mhstnOcdhdhJWRO18b2M8uXA6gib0cU1 Clq6nTXcsDij2bLIXlpq43V+8eW+C6DVBFHla61i36D6I7BTVAL7/6zVWtequ/bpHGNu gDNfDuqJQKAu4GwpDtrzv2ytstbFNwPr3MW7KFDVt3578S7/d1hRwOrxQ/fHaxCXnMbL 8LxhxnTBP58sgp7yRuYbA1zX5D65hfM2MwkvjU56l/rnPEP8GNNk4441st0oAFTuWCue 1k5Oan6xmqPiAntZcu6P1muT42+epDeh/SOTFp1meoMdszkOkSfO+ugeR3CyNM0pPbNB hCFg== X-Gm-Message-State: ALQs6tBscM8UXo3pvFLWRz/s+gTIr6l3/e/4MpDueSETtXDsk1jQmMlo xBVFz8exZ0W+5uW7dQnKvx3BWQ== X-Google-Smtp-Source: AIpwx4/W5E70/o1ZfrbR7JeLoOODyxJGnogpb0srdpZlyE1BJAHyTFdaelVmA2JmsHPFBaYNdIhzsQ== X-Received: by 10.31.2.71 with SMTP id 68mr1726237vkc.109.1522817453760; Tue, 03 Apr 2018 21:50:53 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.31.196.71 with SMTP id u68ls1116286vkf.4.gmail; Tue, 03 Apr 2018 21:50:52 -0700 (PDT) X-Received: by 10.31.193.140 with SMTP id r134mr2053258vkf.6.1522817451921; Tue, 03 Apr 2018 21:50:51 -0700 (PDT) In-Reply-To: X-Original-Sender: bengt.gustafsson@beamways.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:37631 Archived-At: ------=_Part_24953_2110069976.1522817451418 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable @Hyman: My intention was that the library function would be an indication t= o the compiler that the extended precision has to be truncated. Otherwise i= t would only be a nop. Implementation could be a few assembly instructions = or, better, integrated into the compiler to affect code generation to achie= ve the desired result. On architectures without extra precision it would be= correct for it to be a nop though. --=20 You received this message because you are subscribed to the Google Groups "= ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. To view this discussion on the web visit https://groups.google.com/a/isocpp= ..org/d/msgid/std-proposals/6eb497fe-8297-48b0-9ee9-112b6ce94580%40isocpp.or= g. ------=_Part_24953_2110069976.1522817451418-- .