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 // SPDX-License-Identifier: MIT
 // Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
  
 #pragma once
  
 #include "ck_tile/core/config.hpp"
 #include "ck_tile/core/numeric/integer.hpp"
 #include "ck_tile/core/numeric/integral_constant.hpp"
 #include "ck_tile/core/utility/functional.hpp"
 #include "ck_tile/core/algorithm/coordinate_transform.hpp"
 #include "ck_tile/core/container/container_helper.hpp"
 #include "ck_tile/core/numeric/math.hpp"
 #include "ck_tile/core/tensor/tile_window.hpp"
 #include "ck_tile/core/utility/type_traits.hpp"
  
 namespace ck_tile {
  
 template <typename BottomTensorView_,
           typename WindowLengths_,
           index_t... SliceBegins,
           index_t... SliceEnds>
 CK_TILE_DEVICE constexpr auto
 get_slice_tile(const tile_window_with_static_lengths<BottomTensorView_, WindowLengths_>& tile,
                sequence<SliceBegins...> slice_begins,
                sequence<SliceEnds...> slice_ends)
 {
     using TileWindow = tile_window_with_static_lengths<BottomTensorView_, WindowLengths_>;
     // NOTE: This API will override the origin of the tile window!
     static_assert(sizeof...(SliceBegins) == sizeof...(SliceEnds));
     static_assert(sizeof...(SliceBegins) == TileWindow::get_num_of_dimension());
  
     constexpr auto slice_lengths = slice_ends - slice_begins;
  
     return make_tile_window(tile.get_bottom_tensor_view(),
                             sequence_to_tuple_of_number(slice_lengths),
                             to_multi_index(slice_begins));
 }
  
 template <typename DataType_,
           typename StaticTileDistribution_,
           index_t... SliceBegins,
           index_t... SliceEnds>
 CK_TILE_DEVICE constexpr auto
 get_slice_tile(const static_distributed_tensor<DataType_, StaticTileDistribution_>& tile,
                sequence<SliceBegins...> slice_begins,
                sequence<SliceEnds...> slice_ends)
 {
     using DataType     = remove_cvref_t<DataType_>;
     using Distribution = remove_cvref_t<StaticTileDistribution_>;
  
     constexpr auto sliced_dstr_yidx_ylen =
         detail::slice_distribution_from_x(Distribution{}, slice_begins, slice_ends);
  
     constexpr auto sliced_dstr      = sliced_dstr_yidx_ylen.template at<0>();
     constexpr auto sliced_y_origins = sliced_dstr_yidx_ylen.template at<1>();
     constexpr auto sliced_y_lengths = sliced_dstr_yidx_ylen.template at<2>();
  
     auto sliced_tensor = make_static_distributed_tensor<DataType>(sliced_dstr);
  
     sliced_tensor.get_thread_buffer() =
         tile.get_y_sliced_thread_data(sliced_y_origins, sliced_y_lengths);
  
     return sliced_tensor;
 }
  
 template <typename DstDataType_,
           typename DstStaticTileDistribution_,
           typename SrcDataType_,
           typename SrcStaticTileDistribution_,
           index_t... SliceBegins,
           index_t... SliceEnds>
 CK_TILE_DEVICE constexpr auto
 set_slice_tile(static_distributed_tensor<DstDataType_, DstStaticTileDistribution_>& dst_tile,
                const static_distributed_tensor<SrcDataType_, SrcStaticTileDistribution_>& src_tile,
                sequence<SliceBegins...> slice_begins,
                sequence<SliceEnds...> slice_ends)
 {
     using DstDistribution = remove_cvref_t<DstStaticTileDistribution_>;
  
     constexpr auto sliced_dstr_yidx_ylen =
         detail::slice_distribution_from_x(DstDistribution{}, slice_begins, slice_ends);
  
     constexpr auto sliced_dstr      = sliced_dstr_yidx_ylen.template at<0>();
     constexpr auto sliced_y_origins = sliced_dstr_yidx_ylen.template at<1>();
     constexpr auto sliced_y_lengths = sliced_dstr_yidx_ylen.template at<2>();
  
     static_assert(std::is_same_v<decltype(sliced_dstr), DstDistribution>, "wrong!");
  
     dst_tile.SetSlicedThreadData(sliced_y_origins, sliced_y_lengths, src_tile.get_thread_buffer());
 }
  
 } // namespace ck_tile