From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/3777 Path: news.gmane.org!not-for-mail From: Szabolcs Nagy Newsgroups: gmane.linux.lib.musl.general Subject: Re: Conformance issues to address after 0.9.12 release Date: Tue, 30 Jul 2013 04:26:21 +0200 Message-ID: <20130730022621.GF25714@port70.net> References: <20130729063456.GA31564@brightrain.aerifal.cx> <20130729160046.GC25714@port70.net> <20130729210448.GG4284@brightrain.aerifal.cx> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1375151201 8736 80.91.229.3 (30 Jul 2013 02:26:41 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 30 Jul 2013 02:26:41 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-3781-gllmg-musl=m.gmane.org@lists.openwall.com Tue Jul 30 04:26:44 2013 Return-path: Envelope-to: gllmg-musl@plane.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 1V3ze7-0000EH-Vw for gllmg-musl@plane.gmane.org; Tue, 30 Jul 2013 04:26:44 +0200 Original-Received: (qmail 30516 invoked by uid 550); 30 Jul 2013 02:26:43 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Original-Received: (qmail 30506 invoked from network); 30 Jul 2013 02:26:42 -0000 Content-Disposition: inline In-Reply-To: <20130729210448.GG4284@brightrain.aerifal.cx> User-Agent: Mutt/1.5.21 (2010-09-15) Xref: news.gmane.org gmane.linux.lib.musl.general:3777 Archived-At: * Rich Felker [2013-07-29 17:04:48 -0400]: > On Mon, Jul 29, 2013 at 06:00:46PM +0200, Szabolcs Nagy wrote: > > * Rich Felker [2013-07-29 02:34:56 -0400]: > > > - i387 math asm does not truncate excess precision. Whether or not > > > this omission is conforming in terms of the return value, it results > > > in lost underflow exceptions, as demonstrated by nsz's math tests. > > > > the underflow problem is not i387 or excess precision related: > > many (odd) math functions are almost the identity function > > around x==0 (sin,asin,tan,atan,sinh,atanh,..) > > In the case of asin, etc it _is_ the excess precision. > ah yes functions with x87 asm are different but the c code for asin has the issues i described so it should fail to raise underflow on arm as well