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

[Andrew Haley]

On Mon, 26 Aug 2024 20:57:02 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> Ok, so on PPC64 we only have one VMReg per VectorRegister. Seems to work. I don't know why s390 needs the individual ones, but that may be better. Except in terms of resource usage and register allocation performance I guess.

Sure, I've wondered many times how PPC64 works. It's odd, and it's certainly not how the register allocator was ever intended to work, but it certainly seems to. maybe one day I'll dig in to it, but not today.

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PR Comment: https://git.openjdk.org/jdk/pull/18162#issuecomment-2311862042