RFR: 8277617: Optimize array copy and clear on x86_64

Tue Nov 23 05:28:06 UTC 2021

On Tue, 23 Nov 2021 04:50:42 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> @dholmes-ora The Intel platforms that supports this ISA has improved implementation of 64-byte load/stores. I could not find any other better way to check in the absence of cupid bit.
>> If it helps, I could further restrict it to (is_intel_family_core() && supports_serialize()). Also, I can add a comment towards this to the avx3_threshold() method.
>
> @sviswa7 that further restriction and an explanatory comment would be appreciated. Thanks.

@dholmes-ora I have implemented your review comments.

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