RFR: 8281375: Accelerate bitCount operation for AVX2 and AVX512 target. [v8]

[Paul Sandoz]

On Tue, 8 Mar 2022 01:33:17 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Tests pass.
>
>> Tests pass.
> 
> Thanks @PaulSandoz. X86 backend changes have been reviewed by @sviswa7, do we need second approval on this.

@jatin-bhateja yes, need another HS reviewer.

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PR: https://git.openjdk.java.net/jdk/pull/7373