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/***************************************************************************************************

 * Copyright (c) 2017 - 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.

 * SPDX-License-Identifier: BSD-3-Clause

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice, this

 * list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 * this list of conditions and the following disclaimer in the documentation

 * and/or other materials provided with the distribution.

 *

 * 3. Neither the name of the copyright holder nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*

**************************************************************************************************/
/*! \file

\brief unit tests for tensor layout

*/

#include "../common/cutlass_unit_test.h"

#include "cutlass/layout/tensor.h"
#include "cutlass/tensor_coord.h"



/////////////////////////////////////////////////////////////////////////////////////////////////

namespace test {

namespace layout {

  void test_NHWC_layout(int n_size, int h_size, int w_size, int c_size) {

    int ldc = c_size + 1;
    int ldw = ldc * (w_size + 2);

    int ldh = ldw * (h_size + 3);


    cutlass::layout::TensorNHWC::Stride tensor_stride({ ldc, ldw, ldh });


    cutlass::layout::TensorNHWC tensor_nhwc(tensor_stride);


    // test pointer offset

    for (int n_idx = 0; n_idx < n_size; n_idx++) {

      for (int h_idx = 0; h_idx < h_size; h_idx++) {

        for (int w_idx = 0; w_idx < w_size; w_idx++) {

          for (int c_idx = 0; c_idx < c_size; c_idx++) {

            cutlass::Tensor4DCoord tensor_coord(n_idx, h_idx, w_idx, c_idx);

            auto ptr_offset = tensor_nhwc(tensor_coord);

            decltype(ptr_offset) reference_offset = c_idx +

              w_idx * ldc +

              h_idx * ldw +

              n_idx * ldh;

            EXPECT_EQ(ptr_offset, reference_offset);

          }

        }

      }

    }


    // test stride

    auto stride = tensor_nhwc.stride();

    EXPECT_EQ(stride, tensor_stride);


    // test capacity

    auto capacity = tensor_nhwc.capacity(cutlass::Tensor4DCoord(n_size, h_size, w_size, c_size));

    decltype(capacity) referece_capacity = ldh * n_size;

    EXPECT_EQ(capacity, referece_capacity);


    // test packed

    auto packed_tensor_layout = tensor_nhwc.packed(cutlass::Tensor4DCoord(n_size, h_size, w_size, c_size));

    auto packed_stride = packed_tensor_layout.stride();

    EXPECT_EQ(packed_stride, cutlass::layout::TensorNHWC::Stride({ c_size, w_size * c_size, h_size * w_size * c_size }));

  }



  void test_NCHW_layout(int n_size, int c_size, int h_size, int w_size) {
    int ldw = w_size + 1;

    int ldh = ldw * (h_size + 2);

    int ldc = ldh * (c_size + 1);


    cutlass::layout::TensorNCHW::Stride tensor_stride({ ldw, ldh, ldc });


    cutlass::layout::TensorNCHW tensor_nchw(tensor_stride);


    // test pointer offset

    for (int n_idx = 0; n_idx < n_size; n_idx++) {

      for (int c_idx = 0; c_idx < c_size; c_idx++) {

        for (int h_idx = 0; h_idx < w_size; h_idx++) {

          for (int w_idx = 0; w_idx < c_size; w_idx++) {

            // tensor4DCoord is always created in nhwc order

            cutlass::Tensor4DCoord tensor_coord(n_idx, h_idx, w_idx, c_idx);

            auto ptr_offset = tensor_nchw(tensor_coord);

            decltype(ptr_offset) reference_offset = w_idx +

              h_idx * ldw +

              c_idx * ldh +

              n_idx * ldc;

            EXPECT_EQ(ptr_offset, reference_offset);

          }

        }

      }

    }


    // test stride

    auto stride = tensor_nchw.stride();

    EXPECT_EQ(stride, tensor_stride);


    // test capacity

    auto capacity = tensor_nchw.capacity(cutlass::Tensor4DCoord(n_size, h_size, w_size, c_size));

    decltype(capacity) referece_capacity = ldc * n_size;

    EXPECT_EQ(capacity, referece_capacity);


    // test packed

    auto packed_tensor_layout = tensor_nchw.packed(cutlass::Tensor4DCoord(n_size, h_size, w_size, c_size));

    auto packed_stride = packed_tensor_layout.stride();

    EXPECT_EQ(packed_stride, cutlass::layout::TensorNHWC::Stride({ w_size, w_size * h_size, w_size * h_size * c_size }));

  }

} // namespace layout

} // namespace test


/////////////////////////////////////////////////////////////////////////////////////////////////

TEST(Layout_Tensor, NHWC_32_12_10_14) {

  int n_size = 32;
  int h_size = 12;

  int w_size = 10;
  int c_size = 14;

  test::layout::test_NHWC_layout(n_size, h_size, w_size, c_size);



}





/////////////////////////////////////////////////////////////////////////////////////////////////



TEST(Layout_Tensor, NCHW_32_12_10_14) {
  int n_size = 32;

  int c_size = 12;
  int h_size = 10;

  int w_size = 14;
  test::layout::test_NCHW_layout(n_size, c_size, h_size, w_size);

}

/////////////////////////////////////////////////////////////////////////////////////////////////