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  1. JDK
  2. JDK-8339063

[aarch64] Skip verify_sve_vector_length after native calls if SVE supports 128 bits VL only

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    • Icon: Enhancement Enhancement
    • Resolution: Fixed
    • Icon: P4 P4
    • 24
    • 24
    • hotspot
    • b14
    • aarch64
    • linux

      The maximum SVE vector length "VLmax" is determined by the hardware: 16 <= VLmax <= 256.
      The value of VL can be configured at runtime: 16 <= VL <= VLmax, where VL must be a multiple of 16.

      Once we find CPU's VLMax is 16 bytes only, the verification "verify_sve_vector_length()" after native calls is not required - in other words, VL cannot be set to a value other than 16.

            jzhu Joshua Zhu
            jzhu Joshua Zhu
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