// Copyright (c) 2023 Huawei Technologies Co., Ltd
// All rights reserved.
//
// Licensed under the BSD 3-Clause License  (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://opensource.org/licenses/BSD-3-Clause
//
// 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 "op_plugin/AclOpsInterface.h"
#include "op_plugin/utils/OpAdapter.h"

namespace acl_op {
using npu_preparation = at_npu::native::OpPreparation;

namespace {

at::Tensor& silu_backward_out_nocheck(
    at::Tensor& grad_input,
    const at::Tensor& grad_output,
    const at::Tensor& self)
{
    at_npu::native::OpCommand cmd;
    cmd.Name("SiluGrad")
      .Input(grad_output)
      .Input(self)
      .Output(grad_input)
      .Run();
    return grad_input;
}
}

at::Tensor& silu_backward_out(const at::Tensor& grad_output,
                              const at::Tensor& self,
                              at::Tensor& grad_input)
{
    npu_preparation::CheckOut({grad_output, self}, grad_input, grad_output);
    silu_backward_out_nocheck(grad_input, grad_output, self);
    return grad_input;
}

at::Tensor silu_backward(const at::Tensor& grad_output, const at::Tensor& self)
{
    at::Tensor grad_input = npu_preparation::apply_tensor(grad_output);
    silu_backward_out_nocheck(grad_input, grad_output, self);
    return grad_input;
}

} // namespace acl_op