RFR: 8334999: RISC-V: implement AES single block encryption/decryption intrinsics [v9]

[Yanhong Zhu]

On Mon, 21 Oct 2024 14:41:57 GMT, Arseny Bochkarev <duke at openjdk.org> wrote:

>> Hello everyone! Please review this port of vector AES single block encryption/decryption intrinsics. On my QEMU with `Zvkned` extension enabled the `test/hotspot/jtreg/compiler/codegen/aes/TestAESMain.java` test is OK. I know that currently hardware implementing this extension is not available on the market but I suppose this PR can be a good starting point on supporting AES intrinsics for RISC-V in OpenJDK.
>
> Arseny Bochkarev has updated the pull request incrementally with four additional commits since the last revision:
> 
>  - Use RISCV64 instead of RISCV
>  - Fixed comment line
>  - Rename reg_number -> rounds in aes_loadkeys
>  - Fix typo

Thanks for the update. Do you mind several more minor cleanups? Looks good to me otherwise. Thanks.
[addon-cleanup.diff.txt](https://github.com/user-attachments/files/17470674/addon-cleanup.diff.txt)

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PR Comment: https://git.openjdk.org/jdk/pull/19960#issuecomment-2428306715