[vectorIntrinsics] RFR: Merge panama-vector:master [v2]

[Jatin Bhateja]

> Rebasing vectorIntrinsics to latest mainline.
> 
> Thanks,
> Jatin

Jatin Bhateja has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 801 commits:

 - Merge branch 'master' of http://github.com/openjdk/panama-vector into merge_master
 - 8281562:[vectorapi] Add support for popcount operation
   
   Reviewed-by: sviswanathan, psandoz
 - 8278468: AArch64: [vectorapi] SVE backend support for CompressM and CompressV(B/H)
   
   Reviewed-by: njian
 - Merge panama-vector:master
   
   Reviewed-by: jbhateja
 - Merge panama-vector:master
   
   Reviewed-by: njian
 - Update asmtest.out.h due to incorrect merge
   
   Reviewed-by: eliu
 - Merge panama-vector:vectorIntrinsics+compress
   
   Reviewed-by: jbhateja
 - Compress JavaDoc.
   
   Reviewed-by: sviswanathan
 - Merge panama-vector:vectorIntrinsics
   
   Reviewed-by: eliu
 - 8276083: Incremental patch to further optimize new compress/expand APIs over X86
   
   Reviewed-by: psandoz
 - ... and 791 more: https://git.openjdk.java.net/panama-vector/compare/7dc7184c...356b868d

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

Changes: https://git.openjdk.java.net/panama-vector/pull/174/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=174&range=01
  Stats: 78282 lines in 198 files changed: 78221 ins; 33 del; 28 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/174.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/174/head:pull/174

PR: https://git.openjdk.java.net/panama-vector/pull/174