[jdk16] RFR: 8260585: AArch64: Wrong code generated for shifting right and accumulating four unsigned short integers [v2]

[Dong Bo]

On Fri, 29 Jan 2021 20:31:16 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Why didn't the testing for JDK-8255949 catch this?  Do you need to fix the regression test too?
>
> Yes, we need regression test for this fix. Or modify existing one to catch it.

Did not run local tests for small loops in JDK-8255949.
Updated a test for all shift and accumulating operations which can catch this.

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PR: https://git.openjdk.java.net/jdk16/pull/136