[jdk18] RFR: 8278796: Incorrect behavior of FloatVector.withLane on X86

[Jatin Bhateja]

- Incorrect operand is being passed to insertps instruction which causes incorrectness issues in FloatVector.withLane operation.
 - Existing JTREG test cases have been modified appropriately with a non-zero insertion index.

Kindly review and share your comments.
Best Regards,
Jatin

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Commit messages:
 - 8278796: Incorrect behavior of FloatVector.withLane on X86

Changes: https://git.openjdk.java.net/jdk18/pull/28/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18&pr=28&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278796
  Stats: 66 lines in 33 files changed: 1 ins; 0 del; 65 mod
  Patch: https://git.openjdk.java.net/jdk18/pull/28.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18 pull/28/head:pull/28

PR: https://git.openjdk.java.net/jdk18/pull/28