[vectorIntrinsics] RFR: 8264321: Create a separate library for x86 Intel SVML assembly intrinsics

[Paul Sandoz]

On Fri, 26 Mar 2021 21:28:38 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

> Intel Short Vector Math Library (SVML) based intrinsics in native x86 assembly provide optimized implementation for Vector API transcendental and trigonometric methods.
> These methods can be built into a separate library instead of being part of libjvm.so or jvm.dll.
> 
> The following changes are made:
>    The source for these methods is placed in the jdk.incubator.vector module under src/jdk.incubator.vector/linux/native/libsvml and src/jdk.incubator.vector/windows/native/libsvml.
>    The assembly source files are named as “*.S” and include files are named as “*.S.inc”.
>    The corresponding build script is placed at make/modules/jdk.incubator.vector/Lib.gmk.
>    Changes are made to build system to support dependency tracking for assembly files with includes.
>    The built native libraries (libsvml.so/svml.dll) are placed in bin directory of JDK on Windows and lib directory of JDK on Linux.
>    The C2 JIT uses the dll_load and dll_lookup to get the addresses of optimized methods from this library.
> 
> Build system changes and module library build scripts are contributed by Magnus Ihse Bursie (ihse at openjdk.org).

I presume this is partially related to https://github.com/openjdk/jdk/pull/3198 ?

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Marked as reviewed by psandoz (Committer).

PR: https://git.openjdk.java.net/panama-vector/pull/53