RFR: 8325991: Accelerate Poly1305 on x86_64 using AVX2 instructions [v10]

[Sandhya Viswanathan]

On Tue, 27 Feb 2024 21:13:07 GMT, Srinivas Vamsi Parasa <duke at openjdk.org> wrote:

>> The goal of this PR is to accelerate the Poly1305 algorithm using AVX2 instructions (including IFMA) for x86_64 CPUs.
>> 
>> This implementation is directly based on the AVX2 Poly1305 hash computation as implemented in Intel(R) Multi-Buffer Crypto for IPsec Library (url: https://github.com/intel/intel-ipsec-mb/blob/main/lib/avx2_t3/poly_fma_avx2.asm)
>> 
>> This PR shows upto 19x speedup on buffer sizes of 1MB.
>
> Srinivas Vamsi Parasa has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update description of Poly1305 algo

@TobiHartmann @vnkozlov Could you please run this through your testing? Also if you have any feedback on the PR please let us know. We are hoping to integrate this by next week.

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PR Comment: https://git.openjdk.org/jdk/pull/17881#issuecomment-1972008414