RFR: 8261649: AArch64: Optimize LSE atomics in C++ code [v4]

[Andrew Haley]

On Thu, 18 Feb 2021 16:43:29 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Andrew Haley has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Switch statement layout.
>
> src/hotspot/cpu/aarch64/vm_version_aarch64.cpp line 192:
> 
>> 190:   if (_cpu == CPU_ARM && (_model == 0xd07 || _model2 == 0xd07)) _features |= CPU_STXR_PREFETCH;
>> 191: 
>> 192:   _features |= CPU_STXR_PREFETCH;
> 
> This looks weird. The line above it adds `CPU_STXR_PREFETCH` conditionally. Which one is correct?

It was a mistake. Gone now.

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PR: https://git.openjdk.java.net/jdk/pull/2611