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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 CC3C6C48BDF for ; Tue, 15 Jun 2021 14:08:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9AED061446 for ; Tue, 15 Jun 2021 14:08:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230305AbhFOOKh (ORCPT ); Tue, 15 Jun 2021 10:10:37 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:50504 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230120AbhFOOKf (ORCPT ); Tue, 15 Jun 2021 10:10:35 -0400 Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-10-0BSCW0PNMeiUs_3ZDkVtBw-1; Tue, 15 Jun 2021 15:08:28 +0100 X-MC-Unique: 0BSCW0PNMeiUs_3ZDkVtBw-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Tue, 15 Jun 2021 15:08:27 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.018; Tue, 15 Jun 2021 15:08:27 +0100 From: David Laight To: 'Bin Meng' , Gary Guo CC: Palmer Dabbelt , Paul Walmsley , "aou@eecs.berkeley.edu" , "nickhu@andestech.com" , "nylon7@andestech.com" , "linux-riscv@lists.infradead.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH] riscv: fix memmove and optimise memcpy when misalign Thread-Topic: [PATCH] riscv: fix memmove and optimise memcpy when misalign Thread-Index: AQHXT3WL0lTofUR6TU66MVYMSFr0J6rxS6gAgCPtaRCAAANAsA== Date: Tue, 15 Jun 2021 14:08:27 +0000 Message-ID: <44e4e70491164ef5b777d06f48b6684f@AcuMS.aculab.com> References: <20210522232256.00003f08@garyguo.net> <17637b10e71b41b89126cbb1b2fa61cf@AcuMS.aculab.com> <20210525153431.0000508d@garyguo.net> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogQmluIE1lbmcNCj4gU2VudDogMTUgSnVuZSAyMDIxIDE0OjQwDQouLi4NCj4gPiBJIHBy ZWZlciBDIHZlcnNpb25zIGFzIHdlbGwsIGFuZCBhY3R1YWxseSBiZWZvcmUgY29tbWl0IDA0MDkx ZDYgd2UgYXJlDQo+ID4gaW5kZWVkIHVzaW5nIHRoZSBnZW5lcmljIEMgdmVyc2lvbi4gVGhlIGlz c3VlIGlzIHRoYXQgMDQwOTFkNg0KPiA+IGludHJvZHVjZXMgYW4gYXNzZW1ibHkgdmVyc2lvbiB0 aGF0J3MgdmVyeSBicm9rZW4uIEl0IGRvZXMgbm90IG9mZmVyDQo+ID4gYW5kIHBlcmZvcm1hbmNl IGltcHJvdmVtZW50IHRvIHRoZSBDIHZlcnNpb24sIGFuZCBicmVha3MgYWxsIHByb2Nlc3NvcnMN Cj4gPiB3aXRob3V0IGhhcmR3YXJlIG1pc2FsaWdubWVudCBzdXBwb3J0DQoNClRoZXJlIG1heSBu ZWVkIHRvIGJlIGEgZmV3IEMgaW1wbGVtZW50YXRpb25zIGZvciBkaWZmZXJlbnQgY3B1DQppbnN0 cnVjdGlvbiBzZXRzLg0KV2hpbGUgdGhlIGNvbXBpbGVyIG1pZ2h0IG1hbmFnZSB0byBEVFJUIChv ciB0aGUgd3JvbmcgdGhpbmcgZ2l2ZW4NCnRoZSByaWdodCBzb3VyY2UpIHVzaW5nIGEgbG9vcCB0 aGF0IG1hdGNoZXMgdGhlIGluc3RydWN0aW9uIHNldA0KaXMgYSBnb29kIGlkZWEuDQoNCkZvciBp bnN0YW5jZSwgeDg2IGNhbiBkbyAqKHJlZ18xICsgcmVnXzIgKiAoMXwyfDR8OCkgKyBjb25zdGFu dCkNCnNvIHlvdSBjYW4gaW5jcmVtZW50IHJlZ18yIGFuZCB1c2UgaXQgZm9yIGJvdGggYnVmZmVy cyB3aGlsZQ0Kc3RpbGwgdW5yb2xsaW5nIGVub3VnaCB0byBoaXQgbWVtb3J5IGJhbmR3aWR0aC4N Cg0KV2l0aCBvbmx5ICoocmVnXzEgKyBjb25zdGFudCkgeW91IG5lZWQgdG8gaW5jcmVtZW50IGJv dGggdGhlDQpzb3VyY2UgYW5kIGRlc3RpbmF0aW9uIGFkZHJlc3Nlcy4NCg0KT1RPSCB5b3UgY2Fu IHNhdmUgYW4gaW5zdHJ1Y3Rpb24gb24geDg2IGJ5IGFkZGluZyB0byAncmVnXzInDQp1bnRpbCBp dCBiZWNvbWVzIHplcm8gKHNvIHlvdSBkb24ndCBuZWVkIGFkZCwgY21wIGFuZCBqbXApLg0KDQpC dXQgYSBtaXBzLWxpa2UgaW5zdHJ1Y3Rpb24gc2V0IChpbmNsdWRlcyByaXNjdiBhbmQgbmlvczIp DQpoYXMgJ2NvbXBhcmUgYW5kIGJyYW5jaCcgc28geW91IG9ubHkgZXZlciBuZWVkIG9uZSBpbnN0 cnVjdGlvbg0KYXQgdGhlIGVuZCBvZiB0aGUgbG9vcC4NCg0KSGF2aW5nIHRvIGhhbmRsZSBtaXNh bGlnbmVkIGNvcGllcyBpcyBhbm90aGVyIGRpc3RpbmN0IGlzc3VlLg0KRm9yIHNvbWUgMzJiaXQg Y3B1IGJ5dGUgY29waWVzIG1heSBiZSBhcyBmYXN0IGFzIGFueSBzaGlmdA0KYW5kIG1hc2sgY29k ZS4NCg0KPiA+ICh5ZXMsIGZpcm13YXJlIGlzIGV4cGVjdGVkIHRvDQo+ID4gdHJhcCBhbmQgaGFu ZGxlIHRoZXNlLCBidXQgdGhleSBhcmUgcGFpbmZ1bGx5IHNsb3cpLg0KDQpZZXMsIHRvIHRoZSBw b2ludCB3aGVyZSB0aGUgc3lzdGVtIHNob3VsZCBqdXN0IHBhbmljIGFuZA0KZm9yY2UgeW91IHRv IGZpeCB0aGUgY29kZS4NCg0KV2hlbiBJIHdlcmUgYSBsYWQgd2UgZm9yY2VkIGV2ZXJ5b25lIHRv IGZpeCB0aGVyZSBjb2RlDQpzbyBpdCB3b3VsZCBydW4gb24gc3BhcmMuDQoNCglEYXZpZA0KDQot DQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFybSwg TWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAoV2Fs ZXMpDQo=