RFR: JDK-8210858: AArch64: remove Math.log intrinsic [v2]

[Andrew Haley]

On Mon, 22 Jan 2024 12:33:53 GMT, Tobias Holenstein <tholenstein at openjdk.org> wrote:

> > > Separately, I do wonder if [JDK-8301202](https://bugs.openjdk.org/browse/JDK-8301202) gives us a reason to avoid even calling to runtime, and instead just stay in Java completely.
> > 
> > 
> > Yes, would be nice to stay in Java. We had a similar discussion in #13606 where I benchmarked the intrinsics on different platforms. But, they still gave up to 

"up to" isn't very interesting here. I think we care more about averages.

40% performance improvement vs. staying in java. I don't think much has changed performance wise since then..
> 
> @jddarcy any thoughts on that?
> 
> Perhaps I should re-run the benchmarks from May 2023..

That would be good. Significant performance deficits on purely numeric code demand explanation.

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PR Comment: https://git.openjdk.org/jdk/pull/17480#issuecomment-1905668165