From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 7497 invoked by alias); 8 Oct 2011 08:46:14 -0000 Received: (qmail 7483 invoked by uid 22791); 8 Oct 2011 08:46:13 -0000 X-SWARE-Spam-Status: No, hits=-2.5 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,SARE_SUB_IMPROVE X-Spam-Check-By: sourceware.org Received: from localhost (HELO sourceware.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sat, 08 Oct 2011 08:46:02 +0000 From: "drepper.fsp at gmail dot com" To: glibc-bugs@sources.redhat.com Subject: [Bug math/6406] Improve performance of libm wrapper functions. Date: Sat, 08 Oct 2011 08:46:00 -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: enhancement X-Bugzilla-Who: drepper.fsp at gmail dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: drepper.fsp at gmail 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: 2011-10/txt/msg00044.txt.bz2 http://sourceware.org/bugzilla/show_bug.cgi?id=6406 --- Comment #7 from Ulrich Drepper 2011-10-08 08:45:27 UTC --- This is horrible. Provide optimized inline versions of the standard functions and then fix the compiler to reuse the result of function calls which convert the floating-point numbers to the bitmasks. If the inlined conversion function is marked 'const' then the compiler should be able to determine that subsequent calls to bits = float2bits(floatvar); return exactly the same result and should reuse it (given that floatvar hasn't changed). -- 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.