RFR: 8349582: APX NDD code generation for OpenJDK [v12]

[Emanuel Peter]

On Thu, 13 Mar 2025 17:53:35 GMT, Srinivas Vamsi Parasa <sparasa at openjdk.org> wrote:

> > I had a quick look over this. It's a bit hard to review for me, because it is basically about specific APX instructions. We probably have to heavily rely on testing. But APX hardware is not yet available, right?
> > How can be best test this? Is there any way to emulate, maybe using SDE? What testing did you run for this?
> 
> The code was tested using the SDE emulator. Apart from small java-based unit tests to check if the correct instruction is being emitted, the APX enabling was also tested on SPECjvm2008 workloads as well.

Ok, I suppose that does not give us great coverage, but it is hard to do much better until we have the actual hardware... thanks 😊

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PR Comment: https://git.openjdk.org/jdk/pull/23501#issuecomment-2742811294