RFR: 8277426: Optimize mask reduction operations on x86 [v2]

[Jie Fu]

On Tue, 23 Nov 2021 23:23:46 GMT, Jie Fu <jiefu at openjdk.org> wrote:

> > @DamonFool Could you please review this patch?
> 
> I will do some testing and feedback. Thanks.

All the tests passed.
But I'm not sure whether all avx512 machines support bmi1 and lzcnt features.

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PR: https://git.openjdk.java.net/jdk/pull/6447