[dpdk-dev] [PATCH v2 3/4] hash: add fallback to software CRC32 implementation
Yerden Zhumabekov
e_zhumabekov at sts.kz
Mon Nov 17 13:41:51 CET 2014
17.11.2014 18:34, Ananyev, Konstantin пишет:
> Hi Yerden,
>
>> +static inline void
>> +rte_hash_crc_set_alg(enum crc32_alg_t alg)
>> +{
>> + int sse42_supp = rte_cpu_get_flag_enabled(RTE_CPUFLAG_SSE4_2);
>> + enum crc32_alg_t alg_supp = sse42_supp ? CRC32_SSE42 : CRC32_SW;
>> +
>> + if (alg == CRC32_SSE42)
>> + crc32_alg = alg_supp;
>> + else
>> + crc32_alg = CRC32_SW;
>> +}
>> +
> Wonder can we define that function with __attribute__((constructor))?
> Then, I suppose we can remove CRC32_AUTODETECT, and remove:
> if (unlikely(crc32_alg == CRC32_AUTODETECT))
> rte_hash_crc_set_alg(CRC32_SSE42);
> from rte_hash_crc_*byte().
Nice feature I was unfamiliar with :)
Since I'm going to revise the patch series anyway, I'll apply it and
test. Thank you.
--
Sincerely,
Yerden Zhumabekov
State Technical Service
Astana, KZ
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