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  1. JDK
  2. JDK-8269879

[PPC64] C2: Math.rint intrinsic uses wrong rounding mode

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    • b31
    • ppc

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        The test api/java_lang/Math/rintround is failing on PPC64 platforms when running with -Xcomp -XX:-TieredCompilation.
        C2 uses frin and xvrdpi instructions which don't use the required rounding mode. Rounding mode "RoundToDPIntegerNearEven" needs to be used. See
        https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#rint-double-

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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-8270052 [PPC64] C2: Math.rint intrinsic uses wrong rounding mode

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8270728 [PPC64] C2: Math.rint intrinsic uses wrong rounding mode

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved
            relates to

            Enhancement - null JDK-8231649 PPC64: Intrinsics for Math.ceil, floor, rint on Power

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

            Commit Commit openjdk/jdk17/1f2bf1d1

            Review Review openjdk/jdk17/215

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                mdoerr Martin Doerr
                mdoerr Martin Doerr
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