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  1. JDK
  2. JDK-8284459

Add x86 back-end implementation for LEADING and TRAILING ZEROS COUNT operations

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    Description

      - Extend SLP vectorizer to auto-vectorize following Java SE APIs.
           1) Integer.numberOfLeadingZeros()
           2) Long.numberOfLeadingZeros()
           3) Integer.numberOfTrailingZeros()
           4) Long.numberOfTrailingZeros()

      - Add optimized X86 backend implementation for VectorOperations.LEADING_ZERO_COUNT and VectorOperations.TRAILING_ZEROS_COUNT
        for AVX512 and legacy targets.

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          relates to

          Enhancement - null JDK-8284502 X86: Backend support for all the newly proposed VectorOperations (Incubation4)

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Sub-task - The sub-task of the issue JDK-8285036 [x86] Add back-end implementation for LEADING and TRAILING ZEROS COUNT operations

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed
          links to

          Commit Commit openjdk/panama-vector/f0b78ab2

          Review Review openjdk/panama-vector/189

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              jbhateja Jatin Bhateja
              jbhateja Jatin Bhateja
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