RFR: 8371820: Further AES performance improvements for key schedule generation

[Martin Doerr]

On Thu, 13 Nov 2025 16:48:28 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.

@smemery: I've seen your recent improvements and performance measurements. It would be great if you could take a look at this proposal and check the performance results in your environment.

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

PR Comment: https://git.openjdk.org/jdk/pull/28299#issuecomment-3528746436