Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261505AbUKCKHp (ORCPT ); Wed, 3 Nov 2004 05:07:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261509AbUKCKHp (ORCPT ); Wed, 3 Nov 2004 05:07:45 -0500 Received: from deliver.epitech.net ([163.5.0.25]:63066 "HELO ideliver.epitech.net") by vger.kernel.org with SMTP id S261505AbUKCKHl (ORCPT ); Wed, 3 Nov 2004 05:07:41 -0500 Date: Wed, 3 Nov 2004 11:07:29 +0100 From: Marc Bevand To: dean gaudet Cc: Denis Vlasenko , linux-kernel@vger.kernel.org Subject: Re: [rc4-amd64] RC4 optimized for AMD64 Message-ID: <20041103100729.GA4664@iah.epita.fr> References: <200411020854.21629.vda@port.imtp.ilyichevsk.odessa.ua> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 789 Lines: 21 dean gaudet wrote: | | [...] | you're asking about spending one byte? one byte extra for code which | could perform better on more CPUs? Guys, this does not matter _for now_, because AFAIK nobody has benchmarked this code on an EM64T P4 CPU. Obviously, if 'sub $1,X' is proved to be faster than 'dec' on the Intel CPU, then I will change the code (since both instructions are equivalent on AMD CPUs). -- Marc Bevand http://www.epita.fr/~bevand_m Computer Science School EPITA - System, Network and Security Dept. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/