From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1752523AbdLMKJg (ORCPT <rfc822;w@1wt.eu>);
        Wed, 13 Dec 2017 05:09:36 -0500
Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:55402 "EHLO
        foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1751173AbdLMKJd (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Wed, 13 Dec 2017 05:09:33 -0500
Subject: Re: [PATCH v3] arm64: v8.4: Support for new floating point
 multiplication instructions
To: Dongjiu Geng <gengdongjiu@huawei.com>, catalin.marinas@arm.com,
        will.deacon@arm.com, corbet@lwn.net, mark.rutland@arm.com,
        Dave.Martin@arm.com, robin.murphy@arm.com, gregkh@linuxfoundation.org,
        arvind.yadav.cs@gmail.com, linux-arm-kernel@lists.infradead.org,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linuxarm@huawei.com
Cc: huangshaoyu@huawei.com, guohanjun@huawei.com, zhanghaibin7@huawei.com,
        zhihui.gao@huawei.com
References: <1513160036-41377-1-git-send-email-gengdongjiu@huawei.com>
From: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Message-ID: <73019dea-3e2c-8d03-fe1a-6c54527fa401@arm.com>
Date: Wed, 13 Dec 2017 10:09:22 +0000
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.4.0
MIME-Version: 1.0
In-Reply-To: <1513160036-41377-1-git-send-email-gengdongjiu@huawei.com>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On 13/12/17 10:13, Dongjiu Geng wrote:
> ARM v8.4 extensions add new neon instructions for performing a
> multiplication of each FP16 element of one vector with the corresponding
> FP16 element of a second vector, and to add or subtract this without an
> intermediate rounding to the corresponding FP32 element in a third vector.
> 
> This patch detects this feature and let the userspace know about it via a
> HWCAP bit and MRS emulation.
> 
> Cc: Dave Martin <Dave.Martin@arm.com>
> Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
> Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
> Reviewed-by: Dave Martin <Dave.Martin@arm.com>

Looks good to me.

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>