From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yerden Zhumabekov <e_zhumabekov-8EHiFRVJVgQ@public.gmane.org>
Subject: Re: [PATCH v6 2/7] hash: add assembly implementation of
 CRC32 intrinsics
Date: Mon, 2 Feb 2015 11:34:01 +0600
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To: "Liang, Cunming" <cunming.liang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, <dev-VfR2kkLFssw@public.gmane.org>
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02.02.2015 11:15, Liang, Cunming =D0=BF=D0=B8=D1=88=D0=B5=D1=82:
>
>> +static inline uint32_t
>> +crc32c_sse42_u64(uint64_t data, uint64_t init_val)
>> +{
>> +    __asm__ volatile(
>> +            "crc32q %[data], %[init_val];"
>> +            : [init_val] "+r" (init_val)
>> +            : [data] "rm" (data));
>> +    return init_val;
>> +}
> [LCM] I'm curious about the benefit of replacing CRC32 intrinsic
> "_mm_crc32_u32/64".

These intrinsics are not available on a platform which has no SSE4.2
support so the build would fail.

See previous suggestion from Neil:=20
http://dpdk.org/ml/archives/dev/2014-November/008353.html

--=20
Sincerely,

Yerden Zhumabekov
State Technical Service
Astana, KZ