RFR: 8269725: AArch64: Add VectorMask query implementation for NEON [v5]

[Xiaohong Gong]

On Wed, 14 Jul 2021 12:47:07 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> Since this change will touch the x86 codes, do you think it's better to create a followed-up patch to remove the shared methods?
>
> Yes, let's do it later. But let's not forget.

Sure, will do it after this patch is merged. Thanks!

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PR: https://git.openjdk.java.net/jdk/pull/4699