RFR: 8353217: Build libsleef on macos-aarch64

[Aleksey Shipilev]

On Sat, 29 Mar 2025 00:58:59 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

make/modules/jdk.incubator.vector/Lib.gmk line 85:

> 83:       DISABLED_WARNINGS_gcc := unused-function sign-compare tautological-compare ignored-qualifiers, \
> 84:       DISABLED_WARNINGS_clang := unused-function sign-compare tautological-compare ignored-qualifiers, \
> 85:       CFLAGS := $(NEON_CFLAGS), \

Is this supposed to match configs for linux-aarch64? I see we add `NEON_CFLAGS` here, and do _not_ add `vector_math_sve.c_CFLAGS` here. I would have thought those two are applicable to macos-aarch64 as well?

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PR Review Comment: https://git.openjdk.org/jdk/pull/24306#discussion_r2020647457