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  1. JDK
  2. JDK-8324874

AArch64: crypto pmull based CRC32/CRC32C intrinsics clobber V8-V15 registers

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    • b09
    • aarch64

    Backports

      Description

        JDK-8302113 and JDK-8302783 enhanced CRC32/CRC32C intrinsics with crypto pmull which is enabled for Neoverse V1 and V2. The intrinsics use `kernel_crc32_common_fold_using_crypto_pmull` which uses V8-V15 registers and potentially clobbers them if they are not saved.

        According to the latest “ABI for the Arm 64-bit Architecture with SVE support”: https://github.com/ARM-software/abi-aa/blob/main/aapcs64/aapcs64.rst

        "Registers v8-v15 must be preserved by a callee across subroutine calls; the remaining registers (v0-v7, v16-v31) do not need to be preserved (or should be preserved by the caller)."

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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-8326217 AArch64: crypto pmull based CRC32/CRC32C intrinsics clobber V8-V15 registers

            • 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-8329158 AArch64: crypto pmull based CRC32/CRC32C intrinsics clobber V8-V15 registers

            • 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-8330779 AArch64: crypto pmull based CRC32/CRC32C intrinsics clobber V8-V15 registers

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

            Enhancement - null JDK-8302113 Improve CRC32 intrinsic with crypto pmull on AArch64

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

            Enhancement - null JDK-8302783 Improve CRC32C intrinsic with crypto pmull on AArch64

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

            Commit Commit openjdk/jdk21u-dev/a9792a84

            Commit Commit openjdk/jdk22u/52b43e99

            Commit Commit openjdk/jdk/4cd31875

            Review Review openjdk/jdk21u-dev/246

            Review Review openjdk/jdk21u/436

            Review Review openjdk/jdk22u/138

            Review Review openjdk/jdk/17701

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                eastigeevich Evgeny Astigeevich
                eastigeevich Evgeny Astigeevich
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                  Updated:
                  Resolved: