RFR: 8188044: We need Math.unsignedMultiplyHigh [v4]

[Andrew Haley]

On Fri, 2 Jul 2021 16:37:21 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Please consider this proposal to add a method `unsignedMultiplyHigh(long,long)` to each of `java.lang.Math` and `java.lang.StrictMath`.
>
> Brian Burkhalter has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
> 
>   8188044: Use multiplyHigh() to leverage the intrinsic

Marked as reviewed by aph (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/4644