RFR: 8349582: APX NDD code generation for OpenJDK [v16]

[Srinivas Vamsi Parasa]

> The goal of this PR is to generate x86 code using Intel Advanced Performance Extensions (APX) instructions which doubles the number of general-purpose registers, from 16 to 32. Intel APX adds nondestructive destination (NDD) and no flags (NF) flavor for the scalar instructions through EVEX encoding.
> 
> For more information about APX, see https://www.intel.com/content/www/us/en/developer/articles/technical/advanced-performance-extensions-apx.html.

Srinivas Vamsi Parasa has updated the pull request incrementally with one additional commit since the last revision:

  Update copyright years in test/hotspot/gtest/x86/x86-asmtest.py
  
  Co-authored-by: Emanuel Peter <emanuel.peter at oracle.com>

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/23501/files
  - new: https://git.openjdk.org/jdk/pull/23501/files/87d08a08..06c52ce3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23501&range=15
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23501&range=14-15

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23501.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23501/head:pull/23501

PR: https://git.openjdk.org/jdk/pull/23501