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

Sat Sep 7 02:11:45 UTC 2024

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

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Commit messages:
 - x86 andw/orw/xorw encoding missing 0x66 prefix

Changes: https://git.openjdk.org/jdk/pull/20901/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20901&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339698
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/20901.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20901/head:pull/20901

PR: https://git.openjdk.org/jdk/pull/20901