RFR: 8351034: Add AVX-512 intrinsics for ML-DSA [v11]

[Jatin Bhateja]

On Mon, 31 Mar 2025 11:11:54 GMT, Ferenc Rakoczi <duke at openjdk.org> wrote:

>> src/hotspot/cpu/x86/vm_version_x86.cpp line 1252:
>> 
>>> 1250:   // Currently we only have them for AVX512
>>> 1251: #ifdef _LP64
>>> 1252:   if (supports_evex() && supports_avx512bw()) {
>> 
>> supports_evex check looks redundant.
>
> These are checks for two different feature bits: CPU_AVX512F and CPU_AVX512BW. Are you saying that the latter implies the former in every implementation of the spec?

AVX512BW is built on top of AVX512F spec. In assembler and other places we only check BW in assertions which implies EVEX.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23860#discussion_r2021381288