// 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/kernels/activation_kernel.h"

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

namespace phi {
template <typename T, typename Context>
void AtanKernel(const Context& dev_ctx,
                const DenseTensor& x,
                DenseTensor* out) {
  using XPUType = typename XPUTypeTrait<T>::Type;
  if (x.numel() == 0) return;
  const T* x_ptr = x.data<T>();
  T* out_ptr = dev_ctx.template Alloc<T>(out);

  int r = xpu::arctan(dev_ctx.x_context(),
                      reinterpret_cast<const XPUType*>(x_ptr),
                      reinterpret_cast<XPUType*>(out_ptr),
                      x.numel());
  PADDLE_ENFORCE_XDNN_SUCCESS(r, "arctan");
}
}  // namespace phi

PD_REGISTER_KERNEL(
    atan, XPU, ALL_LAYOUT, phi::AtanKernel, float, phi::float16) {}