// 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.

#pragma once

// CUDA and HIP use same api
#if defined(PADDLE_WITH_CUDA) || defined(PADDLE_WITH_HIP)

#include "paddle/pten/core/dense_tensor.h"

// See Note [ Why still include the fluid headers? ]
#include "paddle/fluid/platform/device_context.h"

namespace pten {

using CUDAContext = paddle::platform::CUDADeviceContext;

template <typename T>
void Flatten(const CUDAContext& dev_ctx,
             const DenseTensor& x,
             int start_axis,
             int stop_axis,
             DenseTensor* out);

template <typename T>
void Cast(const CUDAContext& dev_ctx,
          const DenseTensor& x,
          DataType out_dtype,
          DataType in_dtype,
          DenseTensor* out);

void ReshapeFromDT(const CUDAContext& dev_ctx,
                   const DenseTensor& x,
                   const DenseTensor& shape,
                   DenseTensor* out);

void ReshapeFromVectorVal(const CUDAContext& dev_ctx,
                          const DenseTensor& x,
                          const std::vector<int64_t>& shape,
                          DenseTensor* out);

void ReshapeFromVectorDT(const CUDAContext& dev_ctx,
                         const DenseTensor& x,
                         const std::vector<DenseTensor>& shape,
                         DenseTensor* out);

void ReshapeFromDTWithXShape(const CUDAContext& dev_ctx,
                             const DenseTensor& x,
                             const DenseTensor& shape,
                             DenseTensor* xshape,
                             DenseTensor* out);

void ReshapeFromVectorValWithXShape(const CUDAContext& dev_ctx,
                                    const DenseTensor& x,
                                    const std::vector<int64_t>& shape,
                                    DenseTensor* xshape,
                                    DenseTensor* out);

void ReshapeFromVectorDTWithXShape(const CUDAContext& dev_ctx,
                                   const DenseTensor& x,
                                   const std::vector<DenseTensor>& shape,
                                   DenseTensor* xshape,
                                   DenseTensor* out);

}  // namespace pten

#endif