From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 24780 invoked by alias); 21 Feb 2008 17:10:12 -0000 Received: (qmail 24579 invoked by alias); 21 Feb 2008 17:09:30 -0000 Date: Thu, 21 Feb 2008 17:10:00 -0000 Message-ID: <20080221170930.24578.qmail@sourceware.org> From: "joseph at codesourcery dot com" To: glibc-bugs@sources.redhat.com In-Reply-To: <20080221091038.5781.grugh@centrum.cz> References: <20080221091038.5781.grugh@centrum.cz> Reply-To: sourceware-bugzilla@sourceware.org Subject: [Bug math/5781] Slow sine function for special values on AMD64 - second attempt X-Bugzilla-Reason: CC 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 X-SW-Source: 2008-02/txt/msg00095.txt.bz2 ------- Additional Comments From joseph at codesourcery dot com 2008-02-21 17:09 ------- Subject: Re: Slow sine function for special values on AMD64 - second attempt On Thu, 21 Feb 2008, jakub at redhat dot com wrote: > which ensures <= 0.5ulp error. Trigonometric etc. functions are > computed using floating point computations, but if the possible error > from that is too high, it uses slower multiprecision computation to > guarantee ultimate precise result. Guess you just picked some worst-case > values. Note that the crlibm developers were willing to contribute their code, an advantage of which is *much* better worst-case performance. -- http://sourceware.org/bugzilla/show_bug.cgi?id=5781 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.