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From "Teddy Choi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-11533) Loop optimization for SIMD in Long*CompareLong*
Date Mon, 05 Oct 2015 15:13:27 GMT

     [ https://issues.apache.org/jira/browse/HIVE-11533?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Teddy Choi updated HIVE-11533:
------------------------------
    Attachment:     (was: HIVE-11533.2.patch)

> Loop optimization for SIMD in Long*CompareLong*
> -----------------------------------------------
>
>                 Key: HIVE-11533
>                 URL: https://issues.apache.org/jira/browse/HIVE-11533
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Vectorization
>            Reporter: Teddy Choi
>            Assignee: Teddy Choi
>            Priority: Minor
>         Attachments: HIVE-11533.1.patch
>
>
> Long*CompareLong* classes can be optimized with subtraction and bitwise operators for
better SIMD optimization.
> {code}
> for(int i = 0; i != n; i++) {
>   outputVector[i] = vector1[0] > vector2[i] ? 1 : 0;
> }
> {code}
> This issue will cover following classes;
> - LongColEqualLongColumn
> - LongColGreaterLongColumn
> - LongColGreaterEqualLongColumn
> - LongColLessLongColumn
> - LongColLessEqualLongColumn
> - LongScalarEqualLongColumn
> - LongScalarGreaterLongColumn
> - LongScalarGreaterEqualLongColumn
> - LongScalarLessLongColumn
> - LongScalarLessEqualLongColumn
> - LongColEqualLongScalar
> - LongColGreaterLongScalar
> - LongColGreaterEqualLongScalar
> - LongColLessLongScalar
> - LongColLessEqualLongScalar
> - LongScalarEqualLongScalar
> - LongScalarGreaterLongScalar
> - LongScalarGreaterEqualLongScalar
> - LongScalarLessLongScalar
> - LongScalarLessEqualLongScalar



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