From owner-sc22wg14+sc22wg14-domo2=www.open-std.org@open-std.org Sun Aug 30 18:54:57 2015 Return-Path: X-Original-To: sc22wg14-domo2 Delivered-To: sc22wg14-domo2@www.open-std.org Received: by www.open-std.org (Postfix, from userid 521) id 57F8E3582F1; Sun, 30 Aug 2015 18:54:57 +0200 (CEST) Delivered-To: sc22wg14@open-std.org Received: from mail-ob0-f169.google.com (mail-ob0-f169.google.com [209.85.214.169]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by www.open-std.org (Postfix) with ESMTP id 929213572EE for ; Sun, 30 Aug 2015 18:54:56 +0200 (CEST) Received: by obcid8 with SMTP id id8so27198802obc.0 for ; Sun, 30 Aug 2015 09:54:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=PJYWtuHKdUYg81mhy9Avbr3H92aHv6mgN+aY3ISVKUQ=; b=FTckAHgFd9A3mLSE7QqCs4rDASaSoKHhhzCrA+x4U9hYwv/cYdPpMhMu13PKocb6q1 91zWkBCEO0HBdtpP3OiKILFuscmyCI8emaWCkoe4Ak0HMKqjxH8ZKvI30zciWv6EzzZt pT8aC14mx7fGrHkk0n/L1qNLLNu67wRIbVAZNktPhqmB8upezDNr35UbPty05ZoHg9GA 7RcPXICJeGfthsAnlq+cUjaQVLpsquEpABYG9LhKkUc0/xGOjrnKQRirO0ux7eWiqFRU 3hY4behhDMQunEQ/80rI2p0igKsaiA91/HJKqrGSlYHm6rmqUFKOZ3eCkBru6Wcx7SiN 1TDg== MIME-Version: 1.0 X-Received: by 10.182.158.164 with SMTP id wv4mr11916999obb.78.1440953694461; Sun, 30 Aug 2015 09:54:54 -0700 (PDT) Received: by 10.202.172.5 with HTTP; Sun, 30 Aug 2015 09:54:54 -0700 (PDT) Received: by 10.202.172.5 with HTTP; Sun, 30 Aug 2015 09:54:54 -0700 (PDT) In-Reply-To: <20150830164516.F01353572EE@www.open-std.org> References: <20150830164516.F01353572EE@www.open-std.org> Date: Sun, 30 Aug 2015 12:54:54 -0400 Message-ID: Subject: Re: (SC22WG14.13763) LDBL_MAX From: Robert Seacord To: "Fred J. Tydeman" Cc: "sc22wg14@open-std. org" Content-Type: multipart/alternative; boundary=089e0149c47618c656051e8a2dd6 Sender: owner-sc22wg14@open-std.org Precedence: bulk --089e0149c47618c656051e8a2dd6 Content-Type: text/plain; charset=UTF-8 Maximum representable because it would be surprising behavior for any value to test greater than LDBL_MAX or for a LDBL_MAX minus a positive value to produce a negative result. On Aug 30, 2015 12:45 PM, "Fred J. Tydeman" wrote: > For most floating-point systems, the maximum representable finite > floating-point > number and the maximum normalized finite floating-point number are the > same. > But, there is at least one implementation where they are not the same. > For such > systems, is it better for LDBL_MAX to be the: > maximum representable finite floating-point number > maximum normalized finite floating-point number > and why? > > > --- > Fred J. Tydeman Tydeman Consulting > tydeman@tybor.com Testing, numerics, programming > +1 (775) 287-5904 Vice-chair of PL22.11 (ANSI "C") > Sample C99+FPCE tests: http://www.tybor.com > Savers sleep well, investors eat well, spenders work forever. > --089e0149c47618c656051e8a2dd6 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Maximum representable because it would be surprising behavio= r for any value to test greater than LDBL_MAX or for a LDBL_MAX minus a pos= itive value to produce a negative result.

On Aug 30, 2015 12:45 PM, "Fred J. Tydeman&= quot; <tydeman@tybor.com> wr= ote:
For most floati= ng-point systems, the maximum representable finite floating-point
number and the maximum normalized finite floating-point number are the same= .
But, there is at least one implementation where they are not the same.=C2= =A0 For such
systems, is it better for LDBL_MAX to be the:
=C2=A0 maximum representable finite floating-point number
=C2=A0 maximum normalized finite floating-point number
and why?


---
Fred J. Tydeman=C2=A0 =C2=A0 =C2=A0 =C2=A0 Tydeman Consulting
tydeman@tybor.com=C2=A0 =C2=A0 =C2= =A0 Testing, numerics, programming
+1 (775)= 287-5904=C2=A0 =C2=A0 =C2=A0 Vice-chair of PL22.11 (ANSI "C"= )
Sample C99+FPCE tests: http://www.tybor.com
Savers sleep well, investors eat well, spenders work forever.
--089e0149c47618c656051e8a2dd6--