// Copyright (c) 2020 PaddlePaddle Authors. 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 "lite/kernels/arm/activation_grad_compute.h"
#include "lite/backends/arm/math/funcs.h"

namespace paddle {
namespace lite {
namespace kernels {
namespace arm {

void SquareGradCompute::Run() {
  auto& param = this->Param<param_t>();
  auto& ctx = this->ctx_->template As<ARMContext>();
  auto out_grad_dims = param.Out_grad->dims();
  auto out_grad_data = param.Out_grad->data<float>();

  auto x_data = param.X->data<float>();
  auto x_grad_data = param.X_grad->mutable_data<float>();
  lite::arm::math::act_square_grad<float>(x_data,
                                          out_grad_data,
                                          x_grad_data,
                                          out_grad_dims.production(),
                                          ctx.threads());
}

}  // namespace arm
}  // namespace kernels
}  // namespace lite
}  // namespace paddle

REGISTER_LITE_KERNEL(square_grad,
                     kARM,
                     kFloat,
                     kNCHW,
                     paddle::lite::kernels::arm::SquareGradCompute,
                     def)
    .BindInput("X", {LiteType::GetTensorTy(TARGET(kARM))})
    .BindInput("Out@GRAD", {LiteType::GetTensorTy(TARGET(kARM))})
    .BindOutput("X@GRAD", {LiteType::GetTensorTy(TARGET(kARM))})
    .Finalize();