RFR: 8312425: [vectorapi] AArch64: Optimize vector math operations with SLEEF [v2]

[Hamlin Li]

On Wed, 10 Apr 2024 09:24:09 GMT, Hamlin Li <mli at openjdk.org> wrote:

> > Thank you for the update and for working on this in general.
> > I've started working on JDK-8329816, preparing the change for the SLEEF specific part of the change. Specifically, I'm currently planning on including the three SLEEF header files, the README and a legal/sleef.md file in that change. Let me know if you have any thoughts/concerns.
> 
> Thanks a lot, that's a great news. Please go ahead to integrate the files via JDK-8329816. :) Besides of the performance issue currently found out, I have no other concerns.

I found the root cause of the performance regression, and have a draft solution for it, I'm running a thorough benchmark to see if it works for all sleef functions we use in jdk.
So, basically this solution is good.

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PR Comment: https://git.openjdk.org/jdk/pull/18605#issuecomment-2048217671