linux-kernel - Re: [PATCH v3] arm64: v8.4: Support for new floating point multiplication instructions

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Message-ID: <b3431080-4689-e66e-ae0f-d0e263cdd47d@huawei.com>
Date:   Fri, 5 Jan 2018 16:22:24 +0800
From:   gengdongjiu <gengdongjiu@...wei.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     Suzuki K Poulose <Suzuki.Poulose@....com>,
        <catalin.marinas@....com>, <will.deacon@....com>, <corbet@....net>,
        <mark.rutland@....com>, <Dave.Martin@....com>,
        <robin.murphy@....com>, <arvind.yadav.cs@...il.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <huangshaoyu@...wei.com>,
        <guohanjun@...wei.com>, <zhanghaibin7@...wei.com>,
        <zhihui.gao@...wei.com>
Subject: Re: [PATCH v3] arm64: v8.4: Support for new floating point
 multiplication instructions

On 2018/1/5 15:57, Greg KH wrote:
> On Fri, Jan 05, 2018 at 09:22:54AM +0800, gengdongjiu wrote:
>> Hi will/catalin
>>
>> On 2017/12/13 18:09, Suzuki K Poulose wrote:
>>> 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@....com>
>>>> Cc: Suzuki K Poulose <suzuki.poulose@....com>
>>>> Signed-off-by: Dongjiu Geng <gengdongjiu@...wei.com>
>>>> Reviewed-by: Dave Martin <Dave.Martin@....com>
>>>
>>> Looks good to me.
>>>
>>> Reviewed-by: Suzuki K Poulose <suzuki.poulose@....com>
>>
>>  sorry to disturb you. Reminder, hope this patch can be applied to Linux 4.15-rc7.
> 
> New features should not be going into 4.15-rc, that should be a 4.16-rc1
> thing, right?

It is also great if it can be applied to 4.16-rc1. Thanks a lot!


> 
> thanks,
> 
> greg k-h
> 
> .
>