RFR: 8186670: Implement _onSpinWait() intrinsic for AArch64 [v3]

[Evgeny Astigeevich]

On Wed, 22 Sep 2021 13:43:02 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> Evgeny Astigeevich has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Move emitting code to MacroAssembler::spin_wait
>>   
>>   Code emitting spin pauses is moved to MacroAssembler::spin_wait.
>>   As OptoAssembly output is changed, tests are updated to parse
>>   PrintAssembly.
>
> It's pretty much expected, yes. The debuginfo isn't all that precise.

Hi @theRealAph @stooart-mon and others,
We have a discussion on CSR request: https://bugs.openjdk.java.net/browse/JDK-8274564.
I appreciate if you share your opinion.

Thanks,
Evgeny

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