[vectorIntrinsics] RFR: 8282389: Add new vector operations to count leading and trailing zeros.

[Swati Sharma]

Hi All,

Added support for new vector operations CLZ (count number of leading zeros) and CTZ (could number of trailing zeros) for all the integral vector types(Byte/Short/Integer/Long).
Added validation and performance tests corresponding the these operations in existing VectorAPI JTREG/JMH suite.

Kindly review and share your feedback.

Thanks and Regards,
Swati Sharma
Intel

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

Commit messages:
 - 8282389: Add new vector operations to count leading and trailing zeros.

Changes: https://git.openjdk.java.net/panama-vector/pull/176/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=176&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282389
  Stats: 3937 lines in 80 files changed: 3926 ins; 11 del; 0 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/176.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/176/head:pull/176

PR: https://git.openjdk.java.net/panama-vector/pull/176