RFR: 8360934: Add AVX-512 intrinsics for ML-KEM - enhancement on AVX512_VBMI [v4]

[Jatin Bhateja]

On Sat, 10 Jan 2026 03:18:56 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Shawn M Emery has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 10 additional commits since the last revision:
>> 
>>  - Merge with mainline
>>  - 8360934: Add AVX-512 intrinsics for ML-KEM - enhancement on AVX512_VBMI
>>    Change Swap to Dup named function/variable
>>    Check for only VBMI support (not VBMI2)
>>  - Update copyright year
>>  - Merge with mainline
>>  - Swap parameter operation with source
>>  - Remove wrong mask from evpsrlvw
>>  - Reverse ordering for vpermb and vpsrlvw instructions
>>  - Switch from vpshldvw to vpsrlvw
>>  - Fix whitespaces
>>  - 8360934: Add AVX-512 intrinsics for ML-KEM - enhancement on AVX512_VBMI and AVX512_VBMI2
>
> src/hotspot/cpu/x86/stubGenerator_x86_64_kyber.cpp line 876:
> 
>> 874:     __ evmovdquq(xmm22, Address(perms), Assembler::AVX_512bit);
>> 875: 
>> 876:     __ BIND(VBMILoop);
> 
> Better to align loop sarting address to OptoLoopAlignment

I will run the micro benchmark on AMD Turin and report by back early next week.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/28815#discussion_r2678273572