RFR: 8327652: S390x: Implements SLP support [v7]

[Lutz Schmidt]

On Tue, 26 Mar 2024 15:10:37 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:
> 
>   PopCountVI supported by z14 onwards.

I agree to disable the vector part in the above mentioned emitters. Please do so by enclosing the code in a 

#if 0
 . . . 
#endif

block. And add a comment why the code was disabled. Add the changed file to this PR. I will then review and approve.

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PR Comment: https://git.openjdk.org/jdk/pull/18162#issuecomment-2299076003