RFR: 8349582: APX NDD code generation for OpenJDK [v15]

[Emanuel Peter]

On Mon, 24 Mar 2025 15:47:37 GMT, Srinivas Vamsi Parasa <sparasa at openjdk.org> wrote:

>> 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 for x86-asmtest.py

test/hotspot/gtest/x86/x86-asmtest.py line 1:

> 1: # Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.

Suggestion:

# Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.

We update the copyright like this ;)

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PR Review Comment: https://git.openjdk.org/jdk/pull/23501#discussion_r2010467195