From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2134 invoked by alias); 29 Feb 2012 19:57:47 -0000 Received: (qmail 2125 invoked by uid 22791); 29 Feb 2012 19:57:46 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_JS X-Spam-Check-By: sourceware.org Received: from localhost (HELO sourceware.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 29 Feb 2012 19:57:34 +0000 From: "jsm28 at gcc dot gnu.org" To: glibc-bugs@sources.redhat.com Subject: [Bug math/5159] Inaccuracies in tgammaf Date: Wed, 29 Feb 2012 19:57:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: glibc X-Bugzilla-Component: math X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jsm28 at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: AssignedTo Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact glibc-bugs-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: glibc-bugs-owner@sourceware.org X-SW-Source: 2012-02/txt/msg00569.txt.bz2 http://sourceware.org/bugzilla/show_bug.cgi?id=5159 Joseph Myers changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|aj at suse dot de |unassigned at sourceware | |dot org --- Comment #3 from Joseph Myers 2012-02-29 19:57:17 UTC --- You didn't mention what architecture this was on. Anyway, confirmed with current sources on x86, and with more and greater errors on x86_64 (I suppose excess precision is helping a bit on x86). Presumably the same cause as other tgamma bugs - all five versions (flt-32, dbl-64, ldbl-96, ldbl-128, ldbl-128ibm) follow the same approach of exp (lgamma) which is problematic for results with large (positive or negative) exponent and needs better implementations for all five cases. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.