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https://issues.apache.org/jira/browse/HIVE-11533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14946033#comment-14946033
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Teddy Choi commented on HIVE-11533:
-----------------------------------
I created a review request on https://reviews.apache.org/r/39066/ Thank you.
> 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, HIVE-11533.2.patch,
> HIVE-11533.3.patch, HIVE-11533.4.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
> - LongColNotEqualLongColumn
> - LongColGreaterLongColumn
> - LongColGreaterEqualLongColumn
> - LongColLessLongColumn
> - LongColLessEqualLongColumn
> - LongScalarEqualLongColumn
> - LongScalarNotEqualLongColumn
> - LongScalarGreaterLongColumn
> - LongScalarGreaterEqualLongColumn
> - LongScalarLessLongColumn
> - LongScalarLessEqualLongColumn
> - LongColEqualLongScalar
> - LongColNotEqualLongScalar
> - LongColGreaterLongScalar
> - LongColGreaterEqualLongScalar
> - LongColLessLongScalar
> - LongColLessEqualLongScalar
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