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  1. JDK
  2. JDK-8251525

AARCH64: Faster Math.signum(fp)

    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 16
    • Fix Version/s: 16
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      b15
    • CPU:
      aarch64

      Description

      C2 compiled code for Java implementation contains 2 branch instructions and expensive moves between GPRs and FPRs. From another hand there is a bunch of instructions that can be used to bypass that.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8252779 compiler/graalunit/HotspotTest.java failed after 8251525

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Enhancement - null JDK-8249198 Faster Math.signum(fp) for positive and negative numbers

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

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              • Assignee:
                dchuyko Dmitry Chuyko
                Reporter:
                dchuyko Dmitry Chuyko
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                Dates

                • Created:
                  Updated:
                  Resolved: