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  1. IMPALA
  2. IMPALA-6357

Use faster carries in decimal arithmetic

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    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • Perf Investigation
    • ghx-label-9

    Description

      Recent x86-64 machines often include instructions for faster additions and multiplications with different carry flag behavior, which can increase performance of 128-bit and 256-bit arithmetic. See

      https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/ia-large-integer-arithmetic-paper.pdf

      Impala could take advantage of this via Intel intrinsics (https://software.intel.com/sites/landingpage/IntrinsicsGuide/#othertechs=ADX,BMI2) or perhaps via codegen

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          Improvement - An improvement or enhancement to an existing feature or task. IMPALA-6344 Optimize decimal multiplication

          • Major - Major loss of function.
          • Resolved

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              jbapple Jim Apple
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                Created:
                Updated: