Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp3714738pxj; Tue, 15 Jun 2021 07:10:35 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwZT0D+7unNvoZAfjVfXLvtxnWkIOpF1xcE0iZbDlgdhZ27+RbEKdwbQH/YCAIOX1pSKyji X-Received: by 2002:a17:907:2709:: with SMTP id w9mr20961123ejk.118.1623766223841; Tue, 15 Jun 2021 07:10:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1623766223; cv=none; d=google.com; s=arc-20160816; b=geHj2cDooY5w6V/looZP2Y+XXaQNkCqLCdHooDytdFg5o+X/pLZyvs7AFQgX+t8LRR HTOcUvnreXZ/2mj4yA2rLsxEEHLSTo0DE1j5BnuB3ptJP9XncgptnWUqgoiq2LvmmiDR kQz8tulmK7RCVic9s0cL8uHdO8u/pFINA9UbYffIMHEixPqME3Rwr8JTA1uGSj6lOIFn KIek1bNQcXkWmWCoOOlE/RDAkgPSfyy8kxxW0HZgbsJlf9n/ziKW/LjuUbnwG8VQkfBT rzPu9PCpQulanvXGVN6IO3UXvx1gs5y75DYi8cR5c+nwugU5vM11llYGWF/t88ZVFWr9 Q+Ww== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :mime-version:accept-language:in-reply-to:references:message-id:date :thread-index:thread-topic:subject:cc:to:from; bh=jgoio0sUtaDCv0PsjnJJ56q3MNZ1Vjnd/kXD3zgkGf0=; b=nkPQ+N/AOyw5lzekE3bBY3n3USV59sgSbeujDfsrLfYQ7RAewQB6EB7dKtmza7SIX/ yjLMh5iOpEd57Ar3A+twXT1pG7SYEXS8D8eLwCDn79GbfKS4lSD90YrCIQhPI/Wa5Xbu VdHHN9tnZQpk6JxXmwzUuFW3FJi82ZJtS7dwrG2BYlruyMS4X0fr9F6cs8Vv6BRPWcTj t6N7zeTgCrx4KmbpQx6yFrHS1eMKpwNnPTxy5LMk1LxeaJKNNU2JVIjjANVotX1udh6O XeQI3CVx/UjXuRXg/stXu9Cal90XUu6soeMCmCDbsz6LqUfNoi5Ag5/ujiO2YEo3gEKp IqMw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=aculab.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id m5si14751662edr.557.2021.06.15.07.09.59; Tue, 15 Jun 2021 07:10:23 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=aculab.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230218AbhFOOKg (ORCPT + 99 others); Tue, 15 Jun 2021 10:10:36 -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=