// Copyright (c) 2023 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 "paddle/phi/core/kernel_registry.h"
#include "paddle/phi/kernels/softmax_grad_kernel.h"

namespace phi {
namespace fusion {

template <typename T, typename Context>
void FusedSoftmaxMaskGradKernel(const Context& dev_ctx,
                                const DenseTensor& out,
                                const DenseTensor& out_grad,
                                DenseTensor* x_grad) {
  dev_ctx.template Alloc<T>(x_grad);
  SoftmaxGradKernel<T, Context>(
      dev_ctx, out, out_grad, 3, x_grad);  // axis for softmax
}

}  // namespace fusion
}  // namespace phi

PD_REGISTER_KERNEL(fused_softmax_mask_grad,
                   CPU,
                   ALL_LAYOUT,
                   phi::fusion::FusedSoftmaxMaskGradKernel,
                   float,
                   double) {}
