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

[Srinivas Vamsi Parasa]

On Thu, 13 Mar 2025 07:10:56 GMT, Emanuel Peter <epeter 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.

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PR Comment: https://git.openjdk.org/jdk/pull/23501#issuecomment-2722243353