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  1. JDK
  2. JDK-8248830

C2: Optimize Rotate API on x86

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    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 16
    • Fix Version/s: 16
    • Component/s: hotspot
    • Subcomponent:
    • Resolved In Build:
      b11
    • CPU:
      x86

      Description

      - Currently rotate operation is inferred through pattern matching over a sequence of shift left/right followed by logic OR operation. Extend this approach to infer vector rotation operations.
      - AVX512 added new vector rotate instructions VPRO[RL][V][QD] which can be exploited by either extending SLP or post SLP pattern matching.

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              Assignee:
              jbhateja Jatin Bhateja
              Reporter:
              jbhateja Jatin Bhateja
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                Updated:
                Resolved: