RFR: 8277617: Optimize array copy and clear on x86_64

Tue Nov 23 06:52:07 UTC 2021

On Tue, 23 Nov 2021 05:24:41 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

>> @sviswa7 that further restriction and an explanatory comment would be appreciated. Thanks.
>
> @dholmes-ora I have implemented your review comments.

Sorry @sviswa7 but could you explain in the comment why/how `avx3_threshold` reporting zero impacts the use 64-byte load/store - the connection is not at all obvious for anyone not fully conversant with AVX3 and how it is used by the code. Thanks.

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PR: https://git.openjdk.java.net/jdk/pull/6512