RFR: 8365732: RISC-V: implement AES CTR intrinsics [v29]

[Anjian Wen]

On Tue, 2 Dec 2025 15:14:09 GMT, Hamlin Li <mli at openjdk.org> wrote:

>> Anjian Wen has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   modify label L_EXIT to L_exit
>
> src/hotspot/cpu/riscv/stubGenerator_riscv.cpp line 2636:
> 
>> 2634:   void counterMode_AESCrypt(int round, Register in, Register out, Register key, Register counter,
>> 2635:                             Register input_len,  Register saved_encrypted_ctr, Register used_ptr) {
>> 2636:     // Algorithm:
> 
> This should be my last comment :)
> Where is this "Algorithm" from? Can you put a link here?

Oh sure, when implementing the Algorithm, I mainly referred to the Java code implementation (https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/com/sun/crypto/provider/CounterMode.java#L200-L212). besides, I referred to the aarch64 implementation (https://github.com/openjdk/jdk/blob/master/src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp#L3190), and made some modifications for RISC-V instructions

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

PR Review Comment: https://git.openjdk.org/jdk/pull/25281#discussion_r2583489697