RFR: JDK-8216437 : PPC64: Add intrinsic for GHASH algorithm [v9]

[Martin Doerr]

On Wed, 22 Jan 2025 11:57:58 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> Suchismith Roy has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 37 commits:
>> 
>>  - spaces
>>  - Merge branch 'master' into ghash_processblocks
>>  - spaces
>>  - update references
>>  - Comments and vsx check
>>  - restore
>>  -  assertion for blocks
>>  -  assertion for blocks
>>  -  clearing bits
>>  -  clearing bits
>>  - ... and 27 more: https://git.openjdk.org/jdk/compare/d777218f...b04b6924
>
> src/hotspot/cpu/ppc/vm_version_ppc.cpp line 314:
> 
>> 312:   else if (UseGHASHIntrinsics) {
>> 313:     FLAG_SET_DEFAULT(UseGHASHIntrinsics, true);
>> 314:   }
> 
> This looks broken. Please take a look how it is implemented for `UseAES`.

hotspot uses 2 spaces indentation. Otherwise, it looks good. We'll test it. Reviewing the algorithm will need some more time.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20235#discussion_r1926726175