bkietz commented on issue #22806:
URL: https://github.com/apache/arrow/issues/22806#issuecomment-1513370288
I think if available software implementations are unsatisfactory, it'd be
preferable to write a very minimal version of our own and handle any operations
by first converting to 32 bit float. This should be sufficient since we'd be
able to use a native type most of the time. In that case, we'd only need to
maintain:
- The cmake logic/flags necessary to enable native IEEE 754-2008 half
precision floats when available
- The conversions `soft 16 bit float <=> 32 bit float`
- Including bitwise equivalence to native 16 bit floats when available
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