RFR: 8331126: [s390x] secondary_super_cache does not scale well [v6]

[Amit Kumar]

On Sat, 29 Jun 2024 10:04:49 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> There are instructions which don't kill the src operand. E.g. ngrk or slrg.
>
> Ok. I assume that CPUs which don't support `z_srlk` are no longer supported.

Yes those are not supported. 

To answer your question, `Distinct-operands facility` needs to be installed for `z_srlk`, which is there from `z11` onwards. We are planning to drop the support for `z10 and below versions` for sure, and will remove the checks. I'll file a RFE soon, after discussion with management.

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PR Review Comment: https://git.openjdk.org/jdk/pull/19544#discussion_r1659806376