From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20D5AC4646D for ; Mon, 13 Aug 2018 13:49:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D631321749 for ; Mon, 13 Aug 2018 13:49:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D631321749 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ACULAB.COM Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729633AbeHMQbh convert rfc822-to-8bit (ORCPT ); Mon, 13 Aug 2018 12:31:37 -0400 Received: from eu-smtp-delivery-211.mimecast.com ([146.101.78.211]:28209 "EHLO eu-smtp-delivery-211.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729031AbeHMQbg (ORCPT ); Mon, 13 Aug 2018 12:31:36 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by eu-smtp-1.mimecast.com with ESMTP id uk-mta-3-9DGzGHwIPAaxmVITDc-rAQ-1; Mon, 13 Aug 2018 14:49:11 +0100 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Mon, 13 Aug 2018 14:50:50 +0100 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Mon, 13 Aug 2018 14:50:50 +0100 From: David Laight To: David Laight , 'Jeff Lien' , "'linux-kernel@vger.kernel.org'" , "'linux-crypto@vger.kernel.org'" , "'linux-block@vger.kernel.org'" , "'linux-scsi@vger.kernel.org'" CC: "'herbert@gondor.apana.org.au'" , "'tim.c.chen@linux.intel.com'" , "'martin.petersen@oracle.com'" , "'david.darrington@wdc.com'" , "'jeff.furlong@wdc.com'" Subject: RE: [PATCH] Performance Improvement in CRC16 Calculations. Thread-Topic: [PATCH] Performance Improvement in CRC16 Calculations. Thread-Index: AQHUMN5vktn+vtPDWUaxGdn9R1jbpaS9kfkwgAAla0A= Date: Mon, 13 Aug 2018 13:50:50 +0000 Message-ID: <73795193e598470188953bab268e7af6@AcuMS.aculab.com> References: <1533928331-21303-1-git-send-email-jeff.lien@wdc.com> <8508c92d70dc41ffb66557e13c988dca@AcuMS.aculab.com> In-Reply-To: <8508c92d70dc41ffb66557e13c988dca@AcuMS.aculab.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.33] MIME-Version: 1.0 X-MC-Unique: 9DGzGHwIPAaxmVITDc-rAQ-1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > A more interesting version would be to generate the lookup table > for a byte followed by 3 zero bytes. > You could then run four separate register dependency chains using the > same 256 entry lookup table. Not sure that works with a table lookup :-( David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)