RFR: 8325991: Accelerate Poly1305 on x86_64 using AVX2 instructions [v5]

[Srinivas Vamsi Parasa]

> 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)

Srinivas Vamsi Parasa has updated the pull request incrementally with one additional commit since the last revision:

  removed unused merge, faster and, redundant mov

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Changes:
  - all: https://git.openjdk.org/jdk/pull/17881/files
  - new: https://git.openjdk.org/jdk/pull/17881/files/f1b18567..a981c1dd

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17881&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17881&range=03-04

  Stats: 24 lines in 3 files changed: 0 ins; 23 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17881.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17881/head:pull/17881

PR: https://git.openjdk.org/jdk/pull/17881