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  1. JDK
  2. JDK-8183570

Rework is_aligned_ to avoid multiple evaluation of the size expression

    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 10
    • Fix Version/s: 10
    • Component/s: hotspot
    • Labels:
      None
    • Subcomponent:
      gc
    • Resolved In Build:
      b21

      Description

      Kim suggests that we replace:
      #define is_aligned_(size, alignment) ((size) == (align_up_((size), (alignment))))

      with:
      #define is_aligned_(size, alignment) (((size) & align_mask(alignment)) == 0)

      to make the expression "simpler, faster, and avoid multiple evaluation of the size expression"

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            • Assignee:
              stefank Stefan Karlsson
              Reporter:
              stefank Stefan Karlsson
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              • Created:
                Updated:
                Resolved: