RFR: 8351034: Add AVX-512 intrinsics for ML-DSA [v2]

[Jatin Bhateja]

On Mon, 3 Mar 2025 19:00:59 GMT, Ferenc Rakoczi <duke at openjdk.org> wrote:

>> By using the AVX-512 vector registers the speed of the computation of the ML-DSA algorithms (key generation, document signing, signature verification) can be approximately doubled.
>
> Ferenc Rakoczi has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added comments, removed debugging printfs

src/hotspot/cpu/x86/stubGenerator_x86_64_sha3.cpp line 420:

> 418:   __ movptr(constant2use, round_consts);
> 419: 
> 420:   __ BIND(rounds24_loop);

For Icache alignment, please use __ align64() before the loop entry.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23860#discussion_r1978822704