Clang and GCC provide _Float16 and there are numerous polyfills which can emulate a 16 bit float for other platforms. This would fill a hole in the kernels and other code which don't currently support HALF_FLOAT.

Reporter: Ben Kietzman / @bkietz
Watchers: Rok Mihevc / @rok

Related issues:

• [C++] Cast to/from halffloat not implemented (is depended upon by)

_{Note: This issue was originally created as ARROW-6436. Please see the migration documentation for further details.}