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From: 胡海 <hhtracer@gmail.com>
To: "huanglingyan (A)" <huanglingyan2@huawei.com>
Cc: Zhangshaokun <zhangshaokun@hisilicon.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	linux-arm-kernel@lists.infradead.org, ard.biesheuvel@linaro.org
Subject: Re: [PATCH v3] arm64: lib: accelerate do_csum with NEON instruction
Date: Thu, 10 Jan 2019 12:08:46 +0800
Message-ID: <CAAq-RfT_Kjd8hbm=BaRg5a6uvTGLzZipt91wpSPXCW51hGTnNQ@mail.gmail.com> (raw)
In-Reply-To: <cd5bb83e-bb0e-b348-5365-095c5fcd9648@huawei.com>

hi, huanglingyan

Have you verified the correctness of do_csum?
I validated it on FT2000+ and do_csum got the wrong result.

You can test it by increasing the input length to more than 60000 and
setting all buffs to 0xff.
I think it's possible that vpadalq_u16 will overflow, and the code
doesn't take this into account.

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Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-06  1:55 Lingyan Huang
2019-01-06  8:26 ` Ard Biesheuvel
     [not found]   ` <9129b882-60f3-8046-0cb9-e0b2452a118d@huawei.com>
2019-01-08 13:54     ` Will Deacon
2019-01-09  2:03       ` huanglingyan (A)
2019-01-10  4:08         ` 胡海 [this message]
2019-01-10  8:14           ` huanglingyan (A)
2019-01-16 16:46         ` Will Deacon
2019-01-18  1:07           ` huanglingyan (A)
2019-01-18 11:14             ` Ard Biesheuvel
2019-02-12  2:26               ` huanglingyan (A)
2019-02-12  7:07                 ` Ard Biesheuvel
2019-02-13  8:42                   ` huanglingyan (A)
2019-02-13  9:15                     ` Ard Biesheuvel
2019-02-13 17:55                       ` Ard Biesheuvel
2019-02-14  9:57                         ` huanglingyan (A)
2019-02-18  8:49                           ` huanglingyan (A)
2019-02-18  9:03                             ` Ard Biesheuvel
2019-01-09 14:58 ` Dave Martin
2019-01-10  8:03   ` huanglingyan (A)
2019-01-10 13:53     ` Dave Martin
     [not found] <1f065749-6676-6489-14ae-fdcfeeb3389c@huawei.com>
2019-01-07  6:11 ` huanglingyan (A)

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