RFR: JDK-8216437 : PPC64: Add intrinsic for GHASH algorithm [v28]

[Suchismith Roy]

On Wed, 19 Mar 2025 08:59:32 GMT, Suchismith Roy <sroy at openjdk.org> wrote:

>> @TheRealMDoerr  
>> https://www.researchgate.net/publication/285612706_Implementing_GCM_on_ARMv8
>> 
>> I think the same algorithm used for polynomial reduction -Section 4.3
>
> Hi @theRealAph Do you see a scope to reduce these swaps in the algorithm , for the above mentioned instructions. 
> I feel there is a similar set of instructions used to perform reduction in 
> https://www.researchgate.net/publication/285612706_Implementing_GCM_on_ARMv8

Hi @theRealAph   Let me know if you need any additional context or if there’s anything I can do to help with the review.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20235#discussion_r2027025476