RFR: 8312425: [vectorapi] AArch64: Optimize vector math operations with SLEEF [v11]

[Hamlin Li]

> Hi,
> Can you help to review the patch?
> This pr is based on previous work and discussion in [pr 16234](https://github.com/openjdk/jdk/pull/16234), [pr 18294](https://github.com/openjdk/jdk/pull/18294).
> * NOTE: This pr depends on https://github.com/openjdk/jdk/pull/19185, which includes a README, a script to generate sleef inline headers and generated sleef inline headers.
> 
> Compared with previous prs, the major change in this pr is to integrate the source of sleef (for the steps, please check `src/jdk.incubator.vector/linux/native/libvectormath/README`), rather than depends on external sleef things (header or lib) at build or run time.
> Besides of this change, also modify the previous changes accordingly, e.g. remove some uncessary files or changes especially in make dir of jdk.
> 
> Besides of the code changes, one important task is to handle the legal process.
> 
> Thanks!
> 
> ## Test
> tests:
> * test/jdk/jdk/incubator/vector/
> * test/hotspot/jtreg/compiler/vectorapi/
> 
> options:
> * -XX:UseSVE=1 -XX:+EnableVectorSupport -XX:+UseVectorStubs
> * -XX:UseSVE=0 -XX:+EnableVectorSupport -XX:+UseVectorStubs
> * -XX:+EnableVectorSupport -XX:-UseVectorStubs
> 
> ## Performance
> 
> ### Options
> * +intrinsic: 'FORK=1;ITER=10;WARMUP_ITER=10;JAVA_OPTIONS=-XX:+UnlockExperimentalVMOptions -XX:+EnableVectorSupport -XX:+UseVectorStubs'
> * -intrinsic: 'FORK=1;ITER=10;WARMUP_ITER=10;JAVA_OPTIONS=-XX:+UnlockExperimentalVMOptions -XX:+EnableVectorSupport -XX:-UseVectorStubs'
> 
> ### Float
> data
> <google-sheets-html-origin style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">
> Benchmark | (size) | Mode | Cnt | Error | Units | Score +intrinsic (UseSVE=1) | Score -intrinsic | Improvement(UseSVE=1) | Score +intrinsic (UseSVE=0) | Score -intrinsic | Improvement (UseSVE=0)
> -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
> Float128Vector.ACOS | 1024 | thrpt | 10 | 0.015 | ops/ms | 245.439 | 101.483 | 2.419 | 245.733 | 102.033 | 2.408
> Float128Vector.ASIN | 1024 | thrpt | 10 | 0.013 | ops/ms | 296.702 | 103.559 | 2.865 | 296.741 | 103.18 | 2.876
> Float128Vector.ATAN | 1024 | thrpt | 10 | 0.004 | ops/ms | 196.862 | 49.627 | 3.967 | 195.891 | 49.771 | 3.936
> Float128Vector.ATAN2 | 1024 | thrpt | 10 | 0.021 | ops/ms | 135.088 | 32.449 | 4.163 | 135.72...

Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:

  skip TANH

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18605/files
  - new: https://git.openjdk.org/jdk/pull/18605/files/da65cfa5..6061c25d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18605&range=10
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18605&range=09-10

  Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/18605.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18605/head:pull/18605

PR: https://git.openjdk.org/jdk/pull/18605