From owner-freebsd-bugs@FreeBSD.ORG Sun Aug 14 18:30:19 2005 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DBF1916A420 for ; Sun, 14 Aug 2005 18:30:19 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9F3B043D55 for ; Sun, 14 Aug 2005 18:30:17 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.3/8.13.3) with ESMTP id j7EIUH5L080818 for ; Sun, 14 Aug 2005 18:30:17 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.3/8.13.1/Submit) id j7EIUHRR080817; Sun, 14 Aug 2005 18:30:17 GMT (envelope-from gnats) Resent-Date: Sun, 14 Aug 2005 18:30:17 GMT Resent-Message-Id: <200508141830.j7EIUHRR080817@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Colin King Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EEC1F16A41F for ; Sun, 14 Aug 2005 18:21:59 +0000 (GMT) (envelope-from cking@m202.net) Received: from ylpvm43.prodigy.net (ylpvm43-ext.prodigy.net [207.115.57.74]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4C7AE43D48 for ; Sun, 14 Aug 2005 18:21:59 +0000 (GMT) (envelope-from cking@m202.net) Received: from pimout2-ext.prodigy.net (pimout2-int.prodigy.net [207.115.4.217]) by ylpvm43.prodigy.net (8.12.10 outbound/8.12.10) with ESMTP id j7EIM5fU005213 for ; Sun, 14 Aug 2005 14:22:05 -0400 Received: from xenon.m202.net (adsl-69-227-134-127.dsl.renocs.nvbell.net [69.227.134.127]) by pimout2-ext.prodigy.net (8.13.4 outbound domainkey aix/8.13.4) with ESMTP id j7EILqlm355562 for ; Sun, 14 Aug 2005 14:21:57 -0400 Received: from mercury.m202.net (mercury.m202.net [10.0.0.1]) by xenon.m202.net (8.13.3/8.13.3) with ESMTP id j7EILnmb051665 for ; Sun, 14 Aug 2005 11:21:49 -0700 (PDT) (envelope-from cking@mercury.m202.net) Received: (from cking@localhost) by mercury.m202.net (8.13.3/8.13.3/Submit) id j7EILm0s036397; Sun, 14 Aug 2005 11:21:48 -0700 (PDT) (envelope-from cking) Message-Id: <200508141821.j7EILm0s036397@mercury.m202.net> Date: Sun, 14 Aug 2005 11:21:48 -0700 (PDT) From: Colin King To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Cc: Subject: misc/84920: math programs reporting incorrect values X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Colin King List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 14 Aug 2005 18:30:20 -0000 >Number: 84920 >Category: misc >Synopsis: math programs reporting incorrect values >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Aug 14 18:30:17 GMT 2005 >Closed-Date: >Last-Modified: >Originator: Colin King >Release: FreeBSD 5.4-RELEASE-p1 i386 >Organization: N/A >Environment: System: FreeBSD mercury 5.4-RELEASE-p1 FreeBSD 5.4-RELEASE-p1 #4: Wed Jun 1 22:07:36 PDT 2005 root@mercury:/usr/src/sys/i386/compile/MERCURY i386 i686 5.4-RELEASE-p1 >Description: Both of these program are giving me incorrect results when subtracting floating-point numbers, so I'm assuming that it is either something wrong with libm, libc, or gcc. >How-To-Repeat: Go to either one of these programs and type an expression that uses at least one floating point number and a subtraction. For example, I used 30.00-29.05 as my expression. In e, the result is 0.949999.... In KDE's kcalc, the result is 0.9500000000000001776356839400250464677811, or 0.9500000000000002 after rounding. >Fix: Not known. xcalc, perl, and openoffice.org do not seem to have this problem. >Release-Note: >Audit-Trail: >Unformatted: