From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2363 invoked by alias); 4 Feb 2014 16:04:11 -0000 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 Received: (qmail 2334 invoked by uid 55); 4 Feb 2014 16:04:08 -0000 From: "joseph at codesourcery dot com" To: glibc-bugs@sourceware.org Subject: [Bug math/16447] erfc (0x6.a8p+4) ldbl-128 throws underflow exception Date: Tue, 04 Feb 2014 16:04:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: glibc X-Bugzilla-Component: math X-Bugzilla-Version: 2.19 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: joseph at codesourcery dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-02/txt/msg00042.txt.bz2 http://sourceware.org/bugzilla/show_bug.cgi?id=16447 --- Comment #2 from joseph at codesourcery dot com --- I would say that the calculation of "unsafe" (which determines whether there is a final scaling step) should be adjusted to count a wider range of cases as unsafe - any case where the problem multiplication might underflow. Note that since this has been tracked to a problem with expl, any fix should add a corresponding expl input showing the problem as an exp test in auto-libm-test-in, rather than only testing the problem indirectly through erfc. -- You are receiving this mail because: You are on the CC list for the bug.