RFR: 8186670: Implement _onSpinWait() intrinsic for AArch64 [v2]

Tue Sep 21 22:22:51 UTC 2021

On Tue, 21 Sep 2021 15:14:09 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> This results no instructions implementing `onspinwait` in OptoAssembly output. Why do we want to hide the details?
>
> It's not useful as a verification that the correct instructions were generated: you need a disassembly for that. OptoAssembly is usually a somewhat briefer format.

Done

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PR: https://git.openjdk.java.net/jdk/pull/5562