[jira] [Created] (ARROW-7469) [C++] Improve division related bit operations

[Liya Fan (Jira)]

Liya Fan created ARROW-7469:
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             Summary: [C++] Improve division related bit operations
                 Key: ARROW-7469
                 URL: https://issues.apache.org/jira/browse/ARROW-7469
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Liya Fan
            Assignee: Liya Fan


Improve some operations in bit_util:

1. Eliminate one division for CeilDiv
2. Avoid overflow for RoundUp
3. Add a utility for CeilDiv(value, 8)



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