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  1. JDK
  2. JDK-8268231

Aarch64: Use Ldp in intrinsics for String.compareTo

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    • b19
    • aarch64
    • generic

    Backports

      Description

        We can use `ldp` instructions to improve the perfomance of C2_MacroAssembler::string_compare which is an intrinsic for String.compareTo. Let's do that.

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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-8282634 Aarch64: Use Ldp in intrinsics for String.compareTo

            • 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-8282781 Aarch64: Use Ldp in intrinsics for String.compareTo

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

            Enhancement - null JDK-8279560 AArch64: generate_compare_long_string_same_encoding and LARGE_LOOP_PREFETCH alignment

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

            Commit Commit openjdk/jdk17u-dev/dd83c4e7

            Commit Commit openjdk/jdk/6d1d4d52

            Review Review openjdk/jdk17u-dev/91

            Review Review openjdk/jdk/4722

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                whuang Wang Huang
                whuang Wang Huang
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                  Updated:
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