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From "Teddy Choi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-11529) Loop optimization for SIMD in IfExprLong*Long*
Date Sun, 05 Feb 2017 15:47:41 GMT

     [ https://issues.apache.org/jira/browse/HIVE-11529?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Teddy Choi updated HIVE-11529:
------------------------------
    Status: Patch Available  (was: Open)

> Loop optimization for SIMD in IfExprLong*Long*
> ----------------------------------------------
>
>                 Key: HIVE-11529
>                 URL: https://issues.apache.org/jira/browse/HIVE-11529
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Vectorization
>            Reporter: Teddy Choi
>            Assignee: Teddy Choi
>            Priority: Minor
>         Attachments: HIVE-11529.2.patch, HIVE-11529.3.patch, HIVE-11529.patch
>
>
> HIVE-10238 showed that ?: operator can be optimized with bitwise operators when it only
handles LongColumnVectors. There are more similar cases as following.
> IfExprLongColumnLongScalar: {code}outputVector[i] = (vector1[i] == 1 ? vector2[i] : arg3Scalar);{code}
> IfExprLongScalarLongColumn: {code}outputVector[i] = (vector1[i] == 1 ? arg2Scalar : vector3[i]);{code}
> IfExprLongScalarLongScalar: {code}outputVector[i] = (vector1[i] == 1 ? arg2Scalar : arg3Scalar);{code}



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