[GitHub] [arrow] rok commented on issue #22806: [C++] vendor a half precision floating point library

["rok (via GitHub)" <gi...@apache.org>]

rok commented on issue #22806:
URL: https://github.com/apache/arrow/issues/22806#issuecomment-1510507313

   I've looked at some libraries to see what is usually used:
   * [TensorFlow](https://github.com/tensorflow/tensorflow/blob/master/third_party/FP16/workspace.bzl) - uses FP16
   * [Numpy](https://github.com/numpy/numpy/blob/7e86c2aadfc6dcee12274db698407275cede1b63/numpy/core/src/common/half.hpp#L2) seems to implement it's own arithmetic.
   * [PyTorch](https://github.com/pytorch/pytorch/tree/be0b12ece576c86c5f059d15a64dcba0eb886ddd/third_party) - uses FP16
   * [FP16](https://github.com/Maratyszcza/FP16/) - seems to be [composed](https://github.com/Maratyszcza/FP16/tree/master/third-party) mostly of [half](https://half.sourceforge.net/) and few functions taken from other places.
   
   Half [seems pretty complete](https://half.sourceforge.net/namespacehalf__float.html) so I think it or [FP16](https://github.com/Maratyszcza/FP16) would make good candidates.
   
   cc @pitrou @bkietz 


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