RFR: 8188046: java.lang.Math.mutliplyHigh does not run in constant time

[Brian Burkhalter]

On Thu, 1 Jul 2021 23:46:00 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> Please consider this proposal to remove the fast path in `java.lang.Math.multiplyHigh()` the small performance improvement of which is eclipsed by the branch penalty.

Please refer to the issue for a benchmark and sample output from it.

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PR: https://git.openjdk.java.net/jdk/pull/4660