Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261190AbUKBVqy (ORCPT ); Tue, 2 Nov 2004 16:46:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261929AbUKBVqx (ORCPT ); Tue, 2 Nov 2004 16:46:53 -0500 Received: from 168.imtp.Ilyichevsk.Odessa.UA ([195.66.192.168]:45837 "HELO port.imtp.ilyichevsk.odessa.ua") by vger.kernel.org with SMTP id S262094AbUKBVpt (ORCPT ); Tue, 2 Nov 2004 16:45:49 -0500 From: Denis Vlasenko To: dean gaudet Subject: Re: [rc4-amd64] RC4 optimized for AMD64 Date: Tue, 2 Nov 2004 23:45:38 +0200 User-Agent: KMail/1.5.4 Cc: Marc Bevand , linux-kernel@vger.kernel.org References: <200411020854.21629.vda@port.imtp.ilyichevsk.odessa.ua> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="koi8-r" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200411022345.38122.vda@port.imtp.ilyichevsk.odessa.ua> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 834 Lines: 24 On Tuesday 02 November 2004 20:52, dean gaudet wrote: > On Tue, 2 Nov 2004, Denis Vlasenko wrote: > > > On Monday 01 November 2004 22:44, dean gaudet wrote: > > > note that > > > p4 would prefer "sub $1, %r11b" here instead of dec... but the difference > > > is likely minimal. > > > > p4 is not the only x86 CPU on the planet. Why should I use > > longer instruction then? > > you're asking about spending one byte? one byte extra for code which > could perform better on more CPUs? You're asking about speedup by 1 cycle on a CPU which will be outdated 6 months from now? -- vda - 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/