From owner-freebsd-numerics@freebsd.org Tue Nov 5 20:44:02 2019 Return-Path: Delivered-To: freebsd-numerics@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 456CA1B4074 for ; Tue, 5 Nov 2019 20:44:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 4771q616DQz41g1 for ; Tue, 5 Nov 2019 20:44:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 25F711B4073; Tue, 5 Nov 2019 20:44:02 +0000 (UTC) Delivered-To: numerics@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 25BA01B4072 for ; Tue, 5 Nov 2019 20:44:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4771q60Ftrz41g0 for ; Tue, 5 Nov 2019 20:44:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id E1CE61A641 for ; Tue, 5 Nov 2019 20:44:01 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id xA5Ki1Es003834 for ; Tue, 5 Nov 2019 20:44:01 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id xA5Ki10W003833 for numerics@FreeBSD.org; Tue, 5 Nov 2019 20:44:01 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: numerics@FreeBSD.org Subject: [Bug 237800] pow(3) returns inaccurate results Date: Tue, 05 Nov 2019 20:44:00 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: misc X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: kargl@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: numerics@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-numerics@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Discussions of high quality implementation of libm functions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Nov 2019 20:44:02 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D237800 Steve Kargl changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kargl@FreeBSD.org --- Comment #12 from Steve Kargl --- (In reply to me from comment #11) > > I've just run into this issue while working on some fp issues in V8. > I'm not skilled enough to improve the algorithm that freebsd uses > here, but if I can help in any other ways let me know. > What do you mean that you ran into this problem? The bugzilla thread indicates that the OP was getting 0.51 ULP error. That is not inaccurate. That is not understanding how floating=20 point math works. --=20 You are receiving this mail because: You are the assignee for the bug.=