From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/13693 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Alexander Monakov Newsgroups: gmane.linux.lib.musl.general Subject: Re: Possible Mistype in exp.c Date: Wed, 30 Jan 2019 15:44:23 +0300 (MSK) Message-ID: References: <20190129110135.GC21289@port70.net> <20190129114308.GD21289@port70.net> <20190130093738.GE21289@port70.net> <20190130121947.GF21289@port70.net> Reply-To: musl@lists.openwall.com Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="245855"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Alpine 2.20.13 (LNX 116 2015-12-14) To: musl@lists.openwall.com Original-X-From: musl-return-13709-gllmg-musl=m.gmane.org@lists.openwall.com Wed Jan 30 13:45:18 2019 Return-path: Envelope-to: gllmg-musl@m.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by blaine.gmane.org with smtp (Exim 4.89) (envelope-from ) id 1gopEz-0011q9-4X for gllmg-musl@m.gmane.org; Wed, 30 Jan 2019 13:45:17 +0100 Original-Received: (qmail 22324 invoked by uid 550); 30 Jan 2019 12:45:14 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Original-Received: (qmail 22302 invoked from network); 30 Jan 2019 12:45:14 -0000 In-Reply-To: <20190130121947.GF21289@port70.net> Xref: news.gmane.org gmane.linux.lib.musl.general:13693 Archived-At: On Wed, 30 Jan 2019, Szabolcs Nagy wrote: > for < 1 ulp the main trick is computing the result as x+y where x is > exact and y is inexact but much smaller than x in magnitude. (this is > the only way to get worst case error < 1 ulp with an fp operation that > does a rounding and at least one of the inputs is inexact.) As I recall this was covered in your GNU Cauldron presentation. Can you upload the slides of that talk to the GCC wiki? (I can help with adding your account to EditorGroup if needed or upload the slides on your behalf if you send me the pdf) Thanks. Alexander