GitLab

Take-over of #1097

* Add fast CUDA focal loss implementation.

* Enable fast math for CUDA focal loss.

* Correct typo.

* replace deprecated macros

* Add fast CUDA focal loss implementation.

* Enable fast math for CUDA focal loss.

* Correct typo.

* replace deprecated macros

* TORCH_CUDA_CHECK -> AT_CUDA_CHECK

The former is defined in torch/csrc/profiler/cuda.cpp so it's not available usually.
The latter however is defined in ATen/cuda/Exceptions.h as an alias of C10_CUDA_CHECK.

* add test

* clean up

* guard for torchvision
Co-authored-by: Wil Kong <alpha0422@gmail.com>