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  1. JDK
  2. JDK-8270340

Base64 decodeBlock intrinsic for Power64 needs cleanup

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    • Icon: Enhancement Enhancement
    • Resolution: Fixed
    • Icon: P5 P5
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    • 16
    • b07
    • ppc
    • linux

      The following things need to be done:

      * The Power10+ pextd "optimization" needs to be removed because although it has fewer instructions, it causes a performance hit on actual hardware
      * Use a constant block to initialize vector registers. This will reduce the overhead of each call to the intrinsic
      * Introduce the xxpermx instruction so that it can be used in a Power10+ optimized decodeBlock table-based lookup
      * Implement the xxpermx table-based lookup for Power10+

            cashford Corey Ashford (Inactive)
            cashford Corey Ashford (Inactive)
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