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 * Copyright (c) 2022-2024 Ali Hassani.
 **************************************************************************************************/
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 *reserved. SPDX-License-Identifier: BSD-3-Clause
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#pragma once

#include <cutlass/cutlass.h>
#include <cutlass/fast_math.h>
#include <cutlass/layout/matrix.h>
#include <cutlass/layout/tensor.h>

#include "natten/cuda/gemm/na2d_problem_size.cuh"
#include "natten/cuda/gemm/neighborhood_attention.cuh"

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

namespace natten {
namespace cuda {
namespace gemm {
namespace threadblock {

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

template <typename Layout_ = cutlass::layout::TensorNDHWC>
struct NA2dAnalyticParams {
  using Layout = Layout_;

  Layout layout;

  //
  // Methods
  //

  CUTLASS_HOST_DEVICE
  NA2dAnalyticParams() {}

  CUTLASS_HOST_DEVICE
  NA2dAnalyticParams(
      NA2dProblemSize const&, // unused; placeholder to match other Params
                              // interfaces.
      Layout const& layout)
      : layout(layout) {}
};

template <typename NAShape_, typename Layout_ = cutlass::layout::TensorNDHWC>
struct NA2dOptimizedParams {
  using NAShape = NAShape_;
  using Layout = Layout_;

  Layout layout;

  cutlass::FastDivmod stride_divmod;
  cutlass::FastDivmod tile_divmod;

  //
  // Methods
  //

  CUTLASS_HOST_DEVICE
  NA2dOptimizedParams()
      : stride_divmod(NAShape::kStride), tile_divmod(NAShape::kTile) {}

  CUTLASS_HOST_DEVICE
  NA2dOptimizedParams(
      NA2dProblemSize const&, // unused; placeholder to match other Params
                              // interfaces.
      Layout const& layout)
      : layout(layout),
        stride_divmod(NAShape::kStride),
        tile_divmod(NAShape::kTile) {}
};

} // namespace threadblock
} // namespace gemm
} // namespace cuda
} // namespace natten

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