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https://issues.apache.org/jira/browse/ARROW-12768?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou resolved ARROW-12768.
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Resolution: Fixed
Issue resolved by pull request 11940
[https://github.com/apache/arrow/pull/11940]
> [C++] Add sign bit checks to floating-point arithmetic kernels tests
> --------------------------------------------------------------------
>
> Key: ARROW-12768
> URL: https://issues.apache.org/jira/browse/ARROW-12768
> Project: Apache Arrow
> Issue Type: Test
> Components: C++
> Reporter: Eduardo Ponce
> Assignee: Antoine Pitrou
> Priority: Minor
> Labels: pull-request-available
> Fix For: 7.0.0
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> There are special cases in arithmetic kernels with floating-point arguments
> that can result in signed values which are equivalent to their unsigned
> counterpart when compared with the equality operator. To make the comparisons
> correct, one needs to also compare the sign bit. For example, *-0.0 == 0.0*
> is true while *std::signbit(-0.0) == std::signbit(0.0)* is false. This issue
> also applies to *Inf* and *NaN* values.
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