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Posted to dev@arrow.apache.org by "Praveen Krishna (JIRA)" <ji...@apache.org> on 2018/10/01 10:35:00 UTC

[jira] [Created] (ARROW-3377) [C++] Remove If statement from bit map set function

Praveen Krishna created ARROW-3377:
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             Summary: [C++] Remove If statement from bit map set function
                 Key: ARROW-3377
                 URL: https://issues.apache.org/jira/browse/ARROW-3377
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Gandiva
            Reporter: Praveen Krishna


Hello,

For setting a bit in bit map (which is used in gandiva) we have a branch statement which can be replaced by bit operations like this
{code:java}
bmap[byteIdx] ^= (-value ^ bmap[byteIdx]) & (1UL << bitIdx);
{code}
 which performs the same operation and we have avoid the branching.



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