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  1. JDK
  2. JDK-8256973

Intrinsic creation for VectorMask query (lastTrue,firstTrue,trueCount) APIs

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    • b23
    • x86

    Description

      Currently VectorMask.trueCount/firstTrue/lastTrue() implementation iterates over underlined boolean array to count/ascertain the position of true bits.
      To create intrinsics for these APIs and emit efficient jit sequence for X86 target.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8267357 build breaks with -Werror option on micro benchmark added for JDK-8256973

          • P1 - Blocks development and/or testing work, production could not run.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8269568 JVM crashes when running VectorMask query tests

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8267364 Remove mask.incr which is introduced by JDK-8256973

          • P5 - Cosmetic problem like misspelt words or misaligned text.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8267370 [Vector API] Fix several crashes after JDK-8256973

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Enhancement - null JDK-8269725 AArch64: Add VectorMask query implementation for NEON

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

          Commit Commit openjdk/jdk/7aa65685

          Review Review openjdk/jdk/3916

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              jbhateja Jatin Bhateja
              luhenry Ludovic Henry
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                Created:
                Updated:
                Resolved: