You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@arrow.apache.org by "Praveen Krishna (JIRA)" <ji...@apache.org> on 2018/10/01 10:45:00 UTC

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

     [ https://issues.apache.org/jira/browse/ARROW-3377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Praveen Krishna updated ARROW-3377:
-----------------------------------
    Summary: [Gandiva][C++] Remove If statement from bit map set function  (was: [C++] Remove If statement from bit map set function)

> [Gandiva][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: C++, Gandiva
>            Reporter: Praveen Krishna
>            Priority: Major
>             Fix For: 0.12.0
>
>
> 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.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)