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[198.84.214.74]) by smtp.gmail.com with ESMTPSA id p75sm10940149qka.72.2021.01.18.07.30.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 18 Jan 2021 07:30:48 -0800 (PST) Subject: Re: New math test failures on Fedora/33 To: Wilco Dijkstra , Andreas Schwab , Wilco Dijkstra via Libc-alpha References: <877doal3be.fsf@igel.home> Organization: Red Hat Message-ID: <849638e1-6bc2-7653-1205-897c07cc283e@redhat.com> Date: Mon, 18 Jan 2021 10:30:47 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Carlos O'Donell via Libc-alpha Reply-To: Carlos O'Donell Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" On 1/18/21 10:20 AM, Wilco Dijkstra wrote: > Hi Andreas, > >>> On the subject of ULPs, how about centralizing the ULP files into a single >>> generic file and only adding entries to target ULP files for special cases? >> >> How about ditching the ULP files altogether?  Why can't we just >> generally accept the maximum valid ULP everywhere? > > Yes that is possible, and that should remove all the annoying ULP file maintenance. > I think the maximum is 10 ULP currently, so if we accepted that for all math functions > then ULP testing would be almost useless. However we could set a target for each > function using a generic ULP file. Then the ULP checker would give a warning if the ULP > is larger (so each target generates a short list of cases that could be improved). If ULP is > larger than some maximum (which could be set per math function) you would get the > existing error. The maximum is higher than 10 ULP on a per-architecture basis e.g. ppc64le long double. -- Cheers, Carlos.