RFR: 8279508: Auto-vectorize Math.round API [v9]

[Joe Darcy]

On Tue, 1 Mar 2022 06:17:06 GMT, Joe Darcy <darcy at openjdk.org> wrote:

>> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   8279508: Adding descriptive comments.
>
> test/jdk/java/lang/Math/RoundTests.java line 32:
> 
>> 30:     public static void main(String... args) {
>> 31:         int failures = 0;
>> 32:         for (int i = 0; i < 100000; i++) {
> 
> Is there an idiom to trigger the auto-vectorization, perhaps using command line arguments, that doesn't bloat the running time of this test?

IMO RoundTests should have a explicit @run tag without any VM options as well.

Do the added VM options run on all platforms in question? What is the approximate time to run the test run compared to before?

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PR: https://git.openjdk.java.net/jdk/pull/7094