RFR: 8279651: [vectorapi] Implement the missing intrinsics for casting from integrals on x64 [v9]

[Quan Anh Mai]

> Hi,
> 
> This patch implements the remaining casts from integral types on x64.
> 
> Thank you very much.

Quan Anh Mai has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 20 additional commits since the last revision:

 - address comments, simplify slow path
 - Merge branch 'master' into vLongToFD
 - fix
 - fix
 - unavailable kortest
 - Merge branch 'vLongToFD' of github.com:MeryKitty/jdk into vLongToFD
 - remove red zone dependency
 - use movmskpd instead of ptest
 - typo
 - copyright year
 - ... and 10 more: https://git.openjdk.java.net/jdk/compare/c7a2bec6...436c9a0d

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7002/files
  - new: https://git.openjdk.java.net/jdk/pull/7002/files/2b5c1e9b..436c9a0d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7002&range=08
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7002&range=07-08

  Stats: 20644 lines in 652 files changed: 13459 ins; 4284 del; 2901 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7002.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7002/head:pull/7002

PR: https://git.openjdk.java.net/jdk/pull/7002