pytorch

4ee1c2c6 - add denormal options (ftz and daz)

add denormal options (ftz and daz) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/15423 Reviewed By: yinghai Differential Revision: D13526340 fbshipit-source-id: de2ecc717b4f778f33a8bf940ed144dbb230c7a8