RFR: 8353217: Build libsleef on macos-aarch64 [v2]

[Erik Joelsson]

On Tue, 1 Apr 2025 19:59:20 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Build and use SLEEF library as a backend implementation for Vector API trigonometric functions on macosx-aarch64 platform.
>> 
>> It improves raw throughput and eliminates GC overhead of non-intrinsified Vector API operation.
>> 
>> PR includes build changes and libsleef sources relocation from `src/jdk.incubator.vector/linux/native/` to `src/jdk.incubator.vector/share/native/`.
>> 
>> Once libsleef library is present, existing code in `stubGenerator_aarch64.cpp` successfully links at JVM startup. 
>> 
>> Testing: hs-tier1 - hs-tier4, microbenchmarks
>
> Vladimir Ivanov has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Build changes
>  - share/native -> unix/native

src/jdk.incubator.vector/unix/native/libsleef/README.md line 13:

> 11: 
> 12: The upstream original source code is available in
> 13: `src/jdk.incubator.vector/share/native/libsleef/upstream`. However, this code is

share -> unix

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PR Review Comment: https://git.openjdk.org/jdk/pull/24306#discussion_r2023742031