From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Original-To: caml-list@yquem.inria.fr Delivered-To: caml-list@yquem.inria.fr Received: from concorde.inria.fr (concorde.inria.fr [192.93.2.39]) by yquem.inria.fr (Postfix) with ESMTP id 234D0BB81 for ; Fri, 18 Nov 2005 20:22:49 +0100 (CET) Received: from smtp01.isp.itmonitor.net (smtp01.isp.itmonitor.net [207.158.33.182]) by concorde.inria.fr (8.13.0/8.13.0) with ESMTP id jAIJMmrv030298 for ; Fri, 18 Nov 2005 20:22:48 +0100 Received: from [192.168.1.4] (o1-dialup-66-81-195-93.rev.o1.com [66.81.195.93]) by smtp01.isp.itmonitor.net (Postfix) with ESMTP id 4FBC0A5C60B; Fri, 18 Nov 2005 11:22:48 -0800 (PST) Message-ID: <437E2A06.4020608@tfb.com> Date: Fri, 18 Nov 2005 11:22:46 -0800 From: Ken Rose Reply-To: rose@acm.org User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.7.12) Gecko/20051005 X-Accept-Language: en-us, en MIME-Version: 1.0 To: caml-list@yquem.inria.fr Subject: Re: [Caml-list] doing MMX through ocaml References: <20051118104926.3d9ffdc0.ocaml-erikd@mega-nerd.com> In-Reply-To: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Miltered: at concorde with ID 437E2A08.000 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Spam: no; 0.00; caml-list:01 ocaml:01 fft:01 iirc:01 wrote:01 transform:02 brian:04 bits:04 mmx:04 mmx:04 core:06 function:08 i'm:08 thus:09 actually:10 X-Spam-Checker-Version: SpamAssassin 3.0.3 (2005-04-27) on yquem.inria.fr X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=disabled version=3.0.3 Brian Hurt wrote: > I'm pretty sure you need at least SSE for MPEG. The core function is an > 8x8 2D FFT. You *might* be able to do in fixed point (and thus in MMX), > but the SSE version would be a lot easier to get right. It's actually an 8x8 Discrete Cosine Transform. It can be done in fixed point. IIRC, you need 18 bits. - ken