[dpdk-dev] [PATCH v6 2/7] hash: add assembly implementation of CRC32 intrinsics

[Yerden Zhumabekov]

02.02.2015 11:15, Liang, Cunming пишет:
>
>> +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: 
http://dpdk.org/ml/archives/dev/2014-November/008353.html

-- 
Sincerely,

Yerden Zhumabekov
State Technical Service
Astana, KZ