ONNX Export Support for Celu (#38243)
Summary:
Add ONNX export support for torch.nn.CELU
Pull Request resolved: https://github.com/pytorch/pytorch/pull/38243
Differential Revision: D21562188
Pulled By: houseroad
fbshipit-source-id: a7056b3127c88e4a96a551ae906440ed8a153e42
