RFR: 8327652: S390x: Implements SLP support [v12]

[Amit Kumar]

On Mon, 14 Oct 2024 09:07:53 GMT, Sidraya Jayagond <sjayagond at openjdk.org> wrote:

>> This PR Adds SIMD support on s390x.
>
> Sidraya Jayagond has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Disable vector instructions from string intrinsics
>   
>   Address Lutz's comments.
>   Disable vector instructions from string intrinsics will be
>   enabled once PR to JDK-8336356 gets integrates.

I ran [tests again](https://github.com/offamitkumar/OpenJDK-s390x-Reports/commit/9a7c2a7405a54ee3f049ad6a4ccf2133cb8b12b3#diff-8dbf1c6ef429df6da64729101a6f4a0c573712068bd9e79cf755ec6ab0aab5ca) and no regression I have seen. Also intrinsics are disabled now. Looks good.

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Marked as reviewed by amitkumar (Committer).

PR Review: https://git.openjdk.org/jdk/pull/18162#pullrequestreview-2435098533