RFR: 8371968: RISC-V: implement AES CBC intrinsics [v3]

[Anjian Wen]

On Mon, 8 Dec 2025 01:17:35 GMT, Fei Yang <fyang at openjdk.org> wrote:

>> Anjian Wen has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:
>> 
>>  - Modify some assert
>>  - RISC-V: implement AES CBC intrinsics
>
> src/hotspot/cpu/riscv/stubGenerator_riscv.cpp line 2786:
> 
>> 2784:       __ mv(x10, input_len);
>> 2785:       __ leave();
>> 2786:       __ ret();
> 
> Since the three cases here duplicate most of the code, seems better to introduce subroutine to simply the code. I think that will be similar as what you do for the CTR AES intrinsic where we have this subroutine `counterMode_AESCrypt` which is called by `generate_counterMode_AESCrypt`.

Thanks, that's a good idea, done!

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PR Review Comment: https://git.openjdk.org/jdk/pull/28320#discussion_r2600830270