From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Thu, 29 Sep 2005 14:31:46 +0100 (BST) Received: from nevyn.them.org ([66.93.172.17]:32747 "EHLO nevyn.them.org") by ftp.linux-mips.org with ESMTP id S8133437AbVI2Nba (ORCPT ); Thu, 29 Sep 2005 14:31:30 +0100 Received: from drow by nevyn.them.org with local (Exim 4.52) id 1EKyVR-0001s8-D1; Thu, 29 Sep 2005 09:31:25 -0400 Date: Thu, 29 Sep 2005 09:31:25 -0400 From: Daniel Jacobowitz To: Nigel Stephens Cc: Matej Kupljen , Ulrich Eckhardt , linux-mips@linux-mips.org Subject: Re: Floating point performance Message-ID: <20050929133124.GA7135@nevyn.them.org> References: <6EC3F44BE5E6B742BE3EBC3465525944096814@emea-exchange3.emea.dps.local> <1127992600.10179.19.camel@localhost.localdomain> <433BD1AA.9060404@mips.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <433BD1AA.9060404@mips.com> User-Agent: Mutt/1.5.8i Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 9080 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: dan@debian.org Precedence: bulk X-list: linux-mips On Thu, Sep 29, 2005 at 12:36:10PM +0100, Nigel Stephens wrote: > > > Matej Kupljen wrote: > > >I thought that SF *should* be relatively fast, because I have > >experience with it on ARM, where Nicolas Pitre wrote amazing > >SF support for the glibc. > >How can we speed-up SF on MIPS? > >Does anybody have some suggestions? > > > > > > Maybe someone should volunteer to port Nicolas's "amazing SF support" > from ARM to MIPS. Hint hint. Unless you've got a spare ASE lying around with conditional execution and a barrel shifter, I don't think this is in the cards. Which isn't to say that someone couldn't write a good MIPS-specific implementation, if they were a sufficiently good FP guru. But my feeling is that ARM is more prone than MIPS to clever tricks that are hard for a compiler to generate. -- Daniel Jacobowitz CodeSourcery, LLC