RFR: 8327652: S390x: Implements SLP support [v9]

[Martin Doerr]

On Mon, 26 Aug 2024 05:17:47 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:
> 
>   Add rebase changes from jdk master

Please don't revert it. The old code wasn't good. The problem should be understood and fixed. Otherwise, this PR should not get integrated. It's a high risk to integrate buggy vector code. We had tons of crashes on PPC64 with the initial version. Also see https://bugs.openjdk.org/browse/JDK-8188802. Does the CPU you were building on support the vector instructions (SuperwordUseVX and UseSFPV)?

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PR Comment: https://git.openjdk.org/jdk/pull/18162#issuecomment-2309941494