RFR: 8371820: Further AES performance improvements for key schedule generation [v7]

[Martin Doerr]

On Mon, 1 Dec 2025 10:27:36 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> This fix simplifies the hotspot intrinsics for some platforms and optimizes the key computation for encryption. We can save the `genInvRoundKeys` computation when we only do encryption.
>> 
>> The micro:org.openjdk.bench.javax.crypto.AESReinit benchmark results are improved by 17% for ppc64 and 26% for x86_64.
>
> Martin Doerr 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 nine additional commits since the last revision:
> 
>  - Minor simplification.
>  - Merge remote-tracking branch 'origin' into 8371820_AES_Crypt
>  - Fix missing whitespace.
>  - Address review comments.
>  - Merge remote-tracking branch 'origin' into 8371820_AES_Crypt
>  - Remove K from AES_Crypt
>  - More minor cleanup.
>  - Improve comment and minor cleanup.
>  - 8371820: Further AES performance improvements for key schedule generation

Thanks for the review!

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PR Comment: https://git.openjdk.org/jdk/pull/28299#issuecomment-3602426006