RFR: 8339698: x86 andw/orw/xorw encoding missing 0x66 prefix

Sun Sep 8 17:29:05 UTC 2024

On Sat, 7 Sep 2024 02:00:49 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

> x86 andw/orw/xorw encoding is missing 0x66 prefix. This bug was discovered as part of the x86 instruction encoding test generation tool and gtest ([JDK-8339507](https://bugs.openjdk.org/browse/JDK-8339507)). This fix is a precursor to the PR for JDK-8339507 (https://github.com/openjdk/jdk/pull/20857).
> 
> Best Regards,
> Sandhya

May I ask what are these instructions used for, and can we simply replace them with the dword version?

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PR Comment: https://git.openjdk.org/jdk/pull/20901#issuecomment-2336762556