//   Copyright (c) 2021 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/cast_kernel.h"

#include "paddle/phi/core/kernel_registry.h"
#include "paddle/phi/core/visit_type.h"
#include "paddle/phi/kernels/cpu/cast_impl.h"

namespace phi {

template <typename T, typename Context>
void CastKernel(const Context& dev_ctx,
                const DenseTensor& x,
                DataType out_dtype,
                DenseTensor* out) {
  if (out->IsSharedWith(x)) {
    PD_VISIT_ALL_TYPES(out_dtype, "CastInplaceKernelImpl", ([&] {
                         CastInplaceKernelImpl<T, data_t>(
                             dev_ctx, x, out_dtype, out);
                       }));
  } else {
    PD_VISIT_ALL_TYPES(out_dtype, "CastKernelImpl", ([&] {
                         CastKernelImpl<T, data_t>(dev_ctx, x, out_dtype, out);
                       }));
  }
}

}  // namespace phi

PD_REGISTER_KERNEL(cast,
                   CPU,
                   ALL_LAYOUT,
                   phi::CastKernel,
                   float,
                   double,
                   int,
                   int64_t,
                   int16_t,
                   bool,
                   int8_t,
                   uint8_t,
                   phi::dtype::float16,
                   phi::dtype::bfloat16,
                   phi::dtype::complex<float>,
                   phi::dtype::complex<double>) {
  kernel->OutputAt(0).SetDataType(phi::DataType::UNDEFINED);
}