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  1. JDK
  2. JDK-8302289

RISC-V: Use bgez instruction in arraycopy_simple_check when possible

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Details

    • Enhancement
    • Resolution: Fixed
    • P4
    • 21
    • 21
    • hotspot
    • b10
    • riscv
    • linux

    Backports

      Description

        Because Klass::_lh_neutral_value is always 0, we can use 'bgez' instead of the combination of 'mv' and 'bge' here for riscv. This could help save one instruction.
        s390 port did similar optimization, refer to src/hotspot/cpu/s390/c1_LIRAssembler_s390.cpp.

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            backported by

            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-8311754 RISC-V: Use bgez instruction in arraycopy_simple_check when possible

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

            Commit Commit openjdk/jdk17u-dev/966fc82d

            Commit Commit openjdk/jdk/99b6c0eb

            Commit Commit openjdk/riscv-port-jdk17u/b324ba6d

            Review Review openjdk/jdk17u-dev/1427

            Review Review openjdk/jdk/12525

            Review Review openjdk/riscv-port-jdk17u/64

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                gcao Gui Cao
                gcao Gui Cao
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                  Created:
                  Updated:
                  Resolved: