Received: by 2002:ac0:a5a7:0:0:0:0:0 with SMTP id m36-v6csp3209189imm; Mon, 13 Aug 2018 07:49:22 -0700 (PDT) X-Google-Smtp-Source: AA+uWPwmxup1EGdZSIElMrzol8IaG5X0CUWLyIiLd0Fh3VBDSzqMpb0EPq4xQRDDRO/se//2HqfF X-Received: by 2002:a63:7a0a:: with SMTP id v10-v6mr17180110pgc.444.1534171762516; Mon, 13 Aug 2018 07:49:22 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1534171762; cv=none; d=google.com; s=arc-20160816; b=v1snk4aoIBHU2hje/gUZpDeJtctB4oeCBVSWX6E8C8125c/sfmz9etdiqHsg3vRj0o oQic25gdlMhaL7MTdDRibehxJVX+x/bHlSakOY6EXHwCR0jbpqcdbqrpVqYF3eIl6Q4q sbDW55vYa8y6tRhWHsfveI4ZVKbKUMeMcxHPLbSoW4Ahwn8Uu8jw4cSDSNPolO4y/gwg p5AoGG0AhD4nz8Iy1sndjzte+rr7P6niyc+QiHIT6emp9iQTVCOGZe9gkRp90XQmiQ7c dBTfnxoQ5FF2ArZqkjj+67vdEKL1Je0osnvBV0p9vujzEo6NqFviGZ21IwtLPX1PnYXv Y4/A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :content-language:accept-language:in-reply-to:references:message-id :date:thread-index:thread-topic:subject:cc:to:from :arc-authentication-results; bh=Cw1OeV47OFXQ8UpQAzVFUcr5TsHl76jgpT0Sj2DE/iE=; b=o1+sCNBd8CUcbsI/N7IfCej+IOHAjQ6IXkvQVBbGR/ZoQup7rUEvJ1eXtwD5CNKu17 tkjgT/QdFTQ94CNS/ZfH3fJVZ9zSlqjBKKgU5yF/z69ci5wo4YySJYktLNUTLeqNdEa0 +lFSb5aO6w8gC9s02nreNRxbaygy26/krcX4rCvFR1bwZckRxDroUx0P9gR0ylbOuSjt ZBXNQqJgItuS12wxFOiEadWTUyK4LPcSR4FVE5LROpcI8W31hAW9pf1GmV1nWpmHUQQy 4pYLOtMqZBGWDpzwsq9JARz5nTbudGEcDXmDv9eQfEH+Y4DRPx/1SBXXwxd94wb1V3SJ UJvQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 140-v6si17403797pgd.19.2018.08.13.07.49.07; Mon, 13 Aug 2018 07:49:22 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729596AbeHMQbh convert rfc822-to-8bit (ORCPT + 99 others); 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)