RFR: 8260501: [Vector API] Improve register usage for shift operations on x86 [v2]

[Jie Fu]

On Thu, 28 Jan 2021 16:30:40 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Looks fine to me.
> @iwanowww please submit mach5 testing for this change before integration.

Thanks @vnkozlov for your review.

@iwanowww , please let me know if it's OK on mach5.
Thanks.

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PR: https://git.openjdk.java.net/jdk/pull/2257