From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 6026 invoked by alias); 11 Mar 2013 06:29:36 -0000 Received: (qmail 5950 invoked by uid 48); 11 Mar 2013 06:29:14 -0000 From: "siddhesh at redhat dot com" To: glibc-bugs@sourceware.org Subject: [Bug math/13932] x86_64 pow unexpectedly slow for some inputs Date: Mon, 11 Mar 2013 06:29:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: glibc X-Bugzilla-Component: math X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: siddhesh at redhat dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: siddhesh at redhat dot com X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 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: 2013-03/txt/msg00044.txt.bz2 http://sourceware.org/bugzilla/show_bug.cgi?id=13932 --- Comment #5 from Siddhesh Poyarekar 2013-03-11 06:29:10 UTC --- If we did, we wouldn't have had to do all those iterations at different precision levels and the result would have been much faster :) Nevertheless, I've added patches to master that ought to improve performance by at least 4x in the worst case, bringing it close to mpfr performance (still about 2x slower though). There's still scope to make it faster, which is why I haven't closed this bug yet. The man pages are not part of glibc, they're a separate project by themselves. There could be a case for adding a note explaining the multiprecision fallback (why it's there, overview, impact, etc.) in the glibc manual though. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.