220 40478 <2c65de99-b905-4253-b02c-5b78d0238643@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: Niall Douglas Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Optional fixed point arithmetic was standardised into C in 2008. Why doesn't C++ adopt it? Date: Wed, 10 Oct 2018 10:40:14 -0700 (PDT) Lines: 74 Approved: news@gmane.org Message-ID: <2c65de99-b905-4253-b02c-5b78d0238643@isocpp.org> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_2700_709589725.1539193214218" X-Trace: blaine.gmane.org 1539193090 4094 195.159.176.226 (10 Oct 2018 17:38:10 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 10 Oct 2018 17:38:10 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDGKFT5YZADRB77S7DOQKGQEU2BKZTQ@isocpp.org Wed Oct 10 19:38:06 2018 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-yb1-f199.google.com ([209.85.219.199]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gAIQw-0000wE-0o for gclcip-std-proposals@m.gmane.org; Wed, 10 Oct 2018 19:38:06 +0200 Original-Received: by mail-yb1-f199.google.com with SMTP id n8-v6sf2040896yba.13 for ; Wed, 10 Oct 2018 10:40:16 -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=Z27ihU+JBPDHjM3on6N2V5hSOYTOL9hf3D3OWz0NH78=; b=KDmM3MFVLsCe0YbecjkDvsd7LZP8oeBCXCSvJYeXqv4cCLkHxPGyotzZJ3XsCCioak X2RRmHo3yNKnnL5PtiXXq16VOFOXC+yl33iRvjVqIF19ZiLdc0pxBjVFa83/bOfx9cHq H9ykYqZiHQKLlYJx2vgiKTO2ChXZMqim9+jXfGI5TuI0IgKL4llFx0J74bNVeWRQc+NK wJg210RzfKDBPEyo6F1JBpzx14ngU6+LlMGbNWx6WtQ654KgoAOUCRSR0FpdFSJrnhaS wX0GoPRyap2HttdI8mSSQmbHPRQADZS+sYFeAFHxZyQ/d71QFHIxSzay5zA5xSUjn2Qz Eu8w== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; 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=Z27ihU+JBPDHjM3on6N2V5hSOYTOL9hf3D3OWz0NH78=; b=C79JRdaaBPhO4S2k1l8lrUunXbynBdjUaQBaaDX8acwPrzSEKcsXE1iLY1VxN9Wr5s MT9WXdk2u5ZrzDaZTrCAc2dT/M2rAkdX/v9k1aC5cxT6QlS+XYfyR1VqBQACTWE4BEl7 eidy8FxieBcj1GSN9TPQcH+q02unDVXoOeQGIpmJqH4qYNC4vBogCqvyfTV0YabXb7Z4 doQZ89vuDggEqzd+JqqXaNV8oaU/U06z2LNZzjWsWDRUA72PHhX/MSIiCE7xZEYV3uNK xW5UMt2I23MpDxlhRGw08/iHzjRGacwrKIp3HQVB7ceMRY9Ic/7nAqpuTHkSqhpGOvE+ manA== 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=Z27ihU+JBPDHjM3on6N2V5hSOYTOL9hf3D3OWz0NH78=; b=dDg2qmQ6mK+sJwedXn9JQocMoMteA7hwfq5Ay+IAZe/AEqH/aUANeLWOxO5Ixs9rau zcVi0bCPkD2atV9WpvMO0KytBmtjf95AfSMqmb/xm06yKp2SB3KGHc2FsXEH7VQKaNHQ 8N+XuSR0ozDv4s1fKvuqORvCI06CzSX8AE//DtTPUGgPFvhTuGY2Q3WE0sSOR8Q6R1XM IuVvntg0v2GoiuNGos6YzN027YqMs9E8bXizEoWLLHJQPMd7v96x4CI1S6ZZ3YLkmyoq QxwQ5EzXobIFg0WNXs5jsW55lBqbSVHAvEmiw1isX8XXteSuvGXnfAtEGAlJ4ngACHHO R0Sg== X-Gm-Message-State: ABuFfogtYVlzx1iNt39oFj+esARCDy+gA7zeSiFVCqiMGEVbn0dF8Y54 A4ggEfzdNE7/ITV6n2N2xinU0g== X-Google-Smtp-Source: ACcGV60Sh3xkRUFPBMJnNptnDuWBMidJS0uABTABaWwKdFHzyBJNxXdAxr423yB8+RVcLRAwqw94Bg== X-Received: by 2002:a25:d788:: with SMTP id o130-v6mr18628522ybg.82.1539193216344; Wed, 10 Oct 2018 10:40:16 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 2002:a81:2347:: with SMTP id j68-v6ls2682042ywj.1.gmail; Wed, 10 Oct 2018 10:40:15 -0700 (PDT) X-Received: by 2002:a81:1a07:: with SMTP id a7-v6mr374901ywa.1.1539193214945; Wed, 10 Oct 2018 10:40:14 -0700 (PDT) In-Reply-To: X-Original-Sender: nialldouglas14@gmail.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:40478 Archived-At: ------=_Part_2700_709589725.1539193214218 Content-Type: multipart/alternative; boundary="----=_Part_2701_1485068716.1539193214218" ------=_Part_2701_1485068716.1539193214218 Content-Type: text/plain; charset="UTF-8" > > > I only know of one compiler that has some implementation of this TR's > fixed point types - that is gcc, which implements it on some targets. I > have tried it, and the code generated is hopeless despite the target > processor having support for some fixed point formats. It is basically > a matter of a gcc developer in the past having implemented the front-end > parts and very basic code generation, presumably with the intention that > others would pick up the ball and turn it into more optimal code now > that the process had been started. However, it has seen no interest > (AFAIK) from either compiler developers or users. > > Useful to learn, thanks. Niall -- 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 email 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/2c65de99-b905-4253-b02c-5b78d0238643%40isocpp.org. ------=_Part_2701_1485068716.1539193214218 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

I only kn= ow of one compiler that has some implementation of this TR's
fixed point types - that is gcc, which implements it on some targets. = =C2=A0I
have tried it, and the code generated is hopeless despite the target
processor having support for some fixed point formats. =C2=A0It is basi= cally
a matter of a gcc developer in the past having implemented the front-en= d
parts and very basic code generation, presumably with the intention tha= t
others would pick up the ball and turn it into more optimal code now
that the process had been started. =C2=A0However, it has seen no intere= st
(AFAIK) from either compiler developers or users.

Useful to learn, thanks.

Nia= ll=C2=A0

--
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