alias_free_cuda/anti_alias_activation.cpp

/* coding=utf-8
 * Copyright (c) 2024, NVIDIA CORPORATION.  All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <cuda_fp16.h>
#include <torch/extension.h>
#include <vector>

namespace anti_alias_activation {

torch::Tensor fwd_cuda(torch::Tensor const& input,
                       torch::Tensor const& filter,
                       torch::Tensor const& alpha,
		       torch::Tensor const& beta
		       );

torch::Tensor fwd(torch::Tensor const& input,
                  torch::Tensor const& filter,
                  torch::Tensor const& alpha,
		  torch::Tensor const& beta
		  ) {
  AT_ASSERTM(input.dim() == 3, "expected 3D tensor");
  //AT_ASSERTM((input.scalar_type() == at::ScalarType::Half) ||
  //	     (input.scalar_type() == at::ScalarType::BFloat16),
  //    "Only fp16 and bf16 are supported");

  return fwd_cuda(input, filter, alpha, beta);
}

} // end namespace anti_alias_activation

PYBIND11_MODULE(TORCH_EXTENSION_NAME, m) {
  m.def("forward",
        &anti_alias_activation::fwd,
	"Anti Alias Activation -- Forward.");
}