[Fakelowp] Open source fake fp16 FC ops (#37923)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37923
ATT. Previously we missed this one.
Test Plan: unittests
Reviewed By: hyuen
Differential Revision: D21426190
fbshipit-source-id: de85892a50a4b4820386e0f0d6adc34d12b33788
