pytorch

48256f3c - Reference implementations for rot90, roll, atleast_1d,2d,3d (#78080)

Reference implementations for rot90, roll, atleast_1d,2d,3d (#78080) This PR adds the following references: - `rot90` - `roll` - `atleast_1d` - `atleast_2d` - `atleast_3d` Pull Request resolved: https://github.com/pytorch/pytorch/pull/78080 Approved by: https://github.com/mruberry