// Copyright (c) 2022 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/kernels/reduce_mean_kernel.h"

#include "paddle/phi/backends/xpu/enforce_xpu.h"
#include "paddle/phi/backends/xpu/xpu_context.h"
#include "paddle/phi/core/kernel_registry.h"
#include "paddle/phi/kernels/xpu/reduce.h"

namespace phi {

template <typename T, typename Context>
void MeanRawKernel(const Context& dev_ctx,
                   const DenseTensor& x,
                   const IntArray& dims,
                   bool keep_dim,
                   bool reduce_all,
                   DenseTensor* out) {
  reduce_all = recompute_reduce_all(x, dims, reduce_all);
  using XPUType = typename XPUTypeTrait<T>::Type;
  auto f = [](xpu::Context* ctx,
              const T* x,
              T* y,
              const std::vector<int>& xdims,
              const std::vector<int>& reduce_dims) {
#ifndef PADDLE_WITH_XPU_PLUGIN
    return xpu::reduce_mean<XPUType>(ctx,
                                     reinterpret_cast<const XPUType*>(x),
                                     reinterpret_cast<XPUType*>(y),
                                     xdims,
                                     reduce_dims);
#else
    return xpu::plugin::fast_reduce_mean<XPUType>(
        ctx,
        reinterpret_cast<const XPUType*>(x),
        reinterpret_cast<XPUType*>(y),
        xdims,
        reduce_dims);
#endif
  };

  int r = XPUReduce<Context, T>(
      dev_ctx, x, dims.GetData(), keep_dim, reduce_all, out, f);

  PADDLE_ENFORCE_XDNN_SUCCESS(r, "reduce_mean");
}

}  // namespace phi

PD_REGISTER_KERNEL(
    mean_raw, XPU, ALL_LAYOUT, phi::MeanRawKernel, float, phi::dtype::float16) {
}
