[jdk21u-dev] RFR: 8216437: PPC64: Add intrinsic for GHASH algorithm

[Suchismith Roy]

On Thu, 15 May 2025 15:30:00 GMT, Suchismith Roy <sroy at openjdk.org> wrote:

>> Hi all,
>> 
>> This pull request contains a backport of commit [cdad6d78](https://github.com/openjdk/jdk/commit/cdad6d788de4785c8dbf2710a86fdacb8d070565) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
>> 
>> The commit being backported was authored by Suchismith Roy on 2 May 2025 and was reviewed by Martin Doerr and Amit Kumar.
>> 
>> Thanks!
>
> Need to adapt code for jdk21 repo. Looking into it

> Hi @suchismith1993 please give a fix request comment that gives the necessary details. The change is definitely not needed for 21, probably a nice-to-have performance optimization.
> 
> This has not been tested in any released JVM yet, do you really want to bring it to 21 now?

It has been tested on the headstream, but not sure which release it would be a part of. 21 is LTS and used by many customers, so the optimisation should be a good addition. 
@TheRealMDoerr  Your thoughts ?

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/1789#issuecomment-3045521715