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  1. JDK
  2. JDK-8262989

Vectorize VectorShuffle checkIndexes, wrapIndexes and laneIsValid methods

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Details

    • Enhancement
    • Resolution: Fixed
    • P4
    • 17
    • None
    • core-libs
    • None
    • b13

    Description

      The hot path of VectorShuffle checkIndexes, wrapIndexes and laneIsValid methods can be implemented using Vector API methods.

      For the attached jmh TestSlice.java, performance improves as below.

      Before:
      Benchmark (size) Mode Cnt Score Error Units
      TestSlice.vectorSliceOrigin 1024 thrpt 5 1224.698 ± 53.825 ops/ms
      TestSlice.vectorSliceUnsliceOrigin 1024 thrpt 5 657.895 ± 31.945 ops/ms

      After:
      Benchmark (size) Mode Cnt Score Error Units
      TestSlice.vectorSliceOrigin 1024 thrpt 5 11221.532 ± 88.616 ops/ms
      TestSlice.vectorSliceUnsliceOrigin 1024 thrpt 5 6509.519 ± 18.102 ops/ms

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              sviswanathan Sandhya Viswanathan
              sviswanathan Sandhya Viswanathan
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                Created:
                Updated:
                Resolved: