pytorch

ebc0aacf - [nnc] Fix half2float conversion and re-enable float16 (#64199)

[nnc] Fix half2float conversion and re-enable float16 (#64199) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/64199 Test Plan: Imported from OSS Reviewed By: ZolotukhinM Differential Revision: D30643865 Pulled By: bertmaher fbshipit-source-id: 9de6adca53bd08839328cbaf6364f7de9550264b