[vectorIntrinsics] RFR: 8266720: Wrong implementation in LibraryCallKit::inline_vector_shuffle_iota [v2]

[Wang Huang]

> Because JDK-8266317 has not been merged into jdk/jdk. So I fix this bug here.
> * This comparsion should be a unsigned cmp
> *  `x86` is not wrong because `x86` does not have 1024-bits vl here. 
>   ```c++
> 
>     ConINode* pred_node = (ConINode*)gvn().makecon(TypeInt::make(BoolTest::ge)); // should BoolTest::ugt
>     Node * lane_cnt  = gvn().makecon(TypeInt::make(num_elem));
>     Node * bcast_lane_cnt = gvn().transform(VectorNode::scalar2vector(lane_cnt, num_elem, type_bt));
>     // should BoolTest::ugt
>     Node* mask = gvn().transform(new VectorMaskCmpNode(BoolTest::ge, bcast_lane_cnt, res, pred_node, vt));

Wang Huang has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - merge vectorIntrinsics
 - fix format
 - 8266720: Wrong implementation in LibraryCallKit::inline_vector_shuffle_iota

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

Changes: https://git.openjdk.java.net/panama-vector/pull/81/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=81&range=01
  Stats: 101 lines in 6 files changed: 99 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/81.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/81/head:pull/81

PR: https://git.openjdk.java.net/panama-vector/pull/81