pytorch

c47c78d0 - Revert D19597036: More code fakefp16 mapping unification

Revert D19597036: More code fakefp16 mapping unification Test Plan: revert-hammer Differential Revision: D19597036 Original commit changeset: deed61945884 fbshipit-source-id: c057e57810a99464aefb00b645613ecd6a7c5533