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  1. JDK
  2. JDK-8280511

AArch64: Combine shift and negate to a single instruction

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    • b18
    • aarch64
    • generic

    Backports

      Description

        In AArch64,

        asr x10, x1, #31
        neg x0, x10

        can be optimized to:

        neg x0, x1, asr #31

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8294873 AArch64: Combine shift and negate to a single instruction

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

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8294897 AArch64: Combine shift and negate to a single instruction

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

            Commit Commit openjdk/jdk17u-dev/0657a3ab

            Commit Commit openjdk/jdk/e572a525

            Review Review openjdk/jdk17u-dev/754

            Review Review openjdk/jdk/7471

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                fgao Fei Gao (Inactive)
                fgao Fei Gao (Inactive)
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                  Created:
                  Updated:
                  Resolved: