[jira] [Commented] (ARROW-8227) [C++] Propose refining SIMD code framework

["Yibo Cai (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-8227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17067558#comment-17067558 ] 

Yibo Cai commented on ARROW-8227:
---------------------------------

Would start with a smaller scope. First to refine defining simd feature macros.

> [C++] Propose refining SIMD code framework
> ------------------------------------------
>
>                 Key: ARROW-8227
>                 URL: https://issues.apache.org/jira/browse/ARROW-8227
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Yibo Cai
>            Assignee: Yibo Cai
>            Priority: Major
>
> Arrow supports wide range of hardware(x86,arm,ppc?) + os(linux,windows,macos,others?) + compiler(gcc,clang,msvc,others?). Managing platform dependent code is non-trivial. This Jira aims to refine(or mess up) simd related code framework.
> Some goals: Move simd feature definition into one place, possibly in cmake, and reduce compiler based ifdef is source code. Manage simd code in one place, but leave non-simd default implementations where they are. Shouldn't introduce any performance penalty, prefer direct inline to runtime dispatcher. Code should be easy to maintain, expand, and hard to make mistakes.



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