// SPDX-License-Identifier: MIT
// Copyright (c) 2024-2025, Advanced Micro Devices, Inc. All rights reserved.

#pragma once

#include "ck_tile/core.hpp"
#include "ck_tile/ops/gemm/warp/warp_gemm_dispatcher.hpp"
#include "ck_tile/ops/common/tensor_layout.hpp"

namespace ck_tile {

template <typename Derived>
struct UniversalGemmBasePolicy
{
    static constexpr auto I0 = number<0>{};
    static constexpr auto I1 = number<1>{};
    static constexpr auto I2 = number<2>{};

    static constexpr auto ATileAccessPattern = tile_distribution_pattern::thread_raked;
    static constexpr auto BTileAccessPattern = tile_distribution_pattern::thread_raked;

    /**
     * @brief Get the maximum global memory vector load size.
     *
     * @tparam Problem      The UniversalGemmPipelineProblem object.
     * @tparam DataType     The tensor data type we're considering.
     * @tparam MNPerBlock   The MPerBlock or NPerBlock value depending on tensor (A/B).
     * @tparam XPerTile     The contiguous Tile dimension size.
     * @return Maximum DRAM vector load size.
     */
    template <typename Problem, typename DataType, index_t MNPerBlock, index_t XPerTile>
    CK_TILE_HOST_DEVICE static constexpr auto GetGlobalVectorLoadSize()
    {
        constexpr index_t BlockSize           = Problem::kBlockSize;
        constexpr index_t KPerBlock           = Problem::BlockGemmShape::kK;
        constexpr index_t elements_per_thread = MNPerBlock * KPerBlock / BlockSize;
        constexpr index_t PackedSize =
            ck_tile::numeric_traits<remove_cvref_t<DataType>>::PackedSize;

        // Assume DataType is even!
        if constexpr(XPerTile % (PackedSize * 32 / sizeof(DataType)) == 0 &&
                     elements_per_thread % (PackedSize * 32 / sizeof(DataType)) == 0 &&
                     PackedSize == 2)
        {
            return (PackedSize * 32 / sizeof(DataType));
        }
        else if constexpr(XPerTile % (PackedSize * 16 / sizeof(DataType)) == 0 &&
                          elements_per_thread % (PackedSize * 16 / sizeof(DataType)) == 0)
        {
            return (PackedSize * 16 / sizeof(DataType));
        }
        else if constexpr(XPerTile % (PackedSize * 8 / sizeof(DataType)) == 0 &&
                          elements_per_thread % (PackedSize * 8 / sizeof(DataType)) == 0)
        {
            return (PackedSize * 8 / sizeof(DataType));
        }
        else if constexpr(sizeof(DataType) >= PackedSize * 4 &&
                          XPerTile % (PackedSize * 4 / sizeof(DataType)) == 0 &&
                          elements_per_thread % (PackedSize * 4 / sizeof(DataType)) == 0)
        {
            return (PackedSize * 4 / sizeof(DataType));
        }
        else if constexpr(sizeof(DataType) >= PackedSize * 2 &&
                          XPerTile % (PackedSize * 2 / sizeof(DataType)) == 0 &&
                          elements_per_thread % (PackedSize * 2 / sizeof(DataType)) == 0)
        {
            return (PackedSize * 2 / sizeof(DataType));
        }
        else
        {
            return PackedSize;
        }
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto GetVectorSizeA()
    {
        using ALayout               = remove_cvref_t<typename Problem::ALayout>;
        using ADataType             = remove_cvref_t<typename Problem::ADataType>;
        constexpr index_t MPerBlock = Problem::BlockGemmShape::kM;
        constexpr index_t KPerBlock = Problem::BlockGemmShape::kK;

        if constexpr(std::is_same_v<ALayout, ck_tile::tensor_layout::gemm::RowMajor>)
        {
            return GetGlobalVectorLoadSize<Problem, ADataType, MPerBlock, KPerBlock>();
        }
        else
        {
            return GetGlobalVectorLoadSize<Problem, ADataType, MPerBlock, MPerBlock>();
        }
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto GetVectorSizeB()
    {
        using BLayout               = remove_cvref_t<typename Problem::BLayout>;
        using BDataType             = remove_cvref_t<typename Problem::BDataType>;
        constexpr index_t NPerBlock = Problem::BlockGemmShape::kN;
        constexpr index_t KPerBlock = Problem::BlockGemmShape::kK;

        if constexpr(std::is_same_v<BLayout, ck_tile::tensor_layout::gemm::RowMajor>)
        {
            return GetGlobalVectorLoadSize<Problem, BDataType, NPerBlock, NPerBlock>();
        }
        else
        {
            return GetGlobalVectorLoadSize<Problem, BDataType, NPerBlock, KPerBlock>();
        }
    }

    /**
     * @brief Get the vector store size for C tensor.
     *
     * @tparam Problem - Gemm pipeline problem class.
     *
     * @note The vector store size for output C tensor would depend on multiple factors
     *       like its data layout and warp gemm C transposition. In general it would
     *       be the number of consecutive elements in contiguous C dimension hold by
     *       single thread.
     *
     * @return The vector store size for C tensor.
     */
    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto GetVectorSizeC()
    {
        using BlockGemm = remove_cvref_t<decltype(Derived::template GetBlockGemm<Problem>())>;
        using WG        = typename BlockGemm::WarpGemm;

        constexpr bool TransposeC = Problem::TransposeC;
        using CLayout             = typename Problem::CLayout;
        using CWarpDstr           = typename WG::CWarpDstr;

        // N is contiguous dimension
        if constexpr(std::is_same_v<CLayout, tensor_layout::gemm::RowMajor>)
        {
            if constexpr(TransposeC)
            {
                // In this case each thread has multiple consecutive elements in
                // N dimension, however consecutive threads' elements have stride.
                constexpr index_t NDimY = CWarpDstr::NDimY;
                constexpr auto c_warp_y_lengths =
                    CWarpDstr{}.get_ys_to_d_descriptor().get_lengths();
                static_assert(WG::WarpGemmAttribute::Impl::kCM1PerLane ==
                              c_warp_y_lengths.get(number<NDimY - 1>{}));
                return c_warp_y_lengths.get(number<NDimY - 1>{});
            }
            else
            {
                // In this case each thread has just a single item in Ndim
                return WG::WarpGemmAttribute::Impl::kCNLane / WG::kN;
            }
        }
        // M is contiguous dimension
        else if constexpr(std::is_same_v<CLayout, tensor_layout::gemm::ColumnMajor>)
        {
            if constexpr(TransposeC)
            {
                // In this case each thread has just a single item in Mdim
                return WG::WarpGemmAttribute::Impl::kCNLane / WG::kN;
            }
            else
            {
                // In this case each thread has multiple consecutive elements in
                // M dimension, however consecutive threads' elements have stride.
                constexpr index_t NDimY = CWarpDstr::NDimY;
                constexpr auto c_warp_y_lengths =
                    CWarpDstr{}.get_ys_to_d_descriptor().get_lengths();
                static_assert(WG::WarpGemmAttribute::Impl::kCM1PerLane ==
                              c_warp_y_lengths.get(number<NDimY - 1>{}));
                return c_warp_y_lengths.get(number<NDimY - 1>{});
            }
        }
        else
        {
            static_assert(false, "Unsupported CLayout!");
        }
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto IsTransposeC()
    {
        return Problem::TransposeC;
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto MakeADramTileDistribution()
    {
        using ALayout = remove_cvref_t<typename Problem::ALayout>;

        constexpr index_t BlockSize   = Problem::kBlockSize;
        constexpr index_t MPerBlock   = Problem::BlockGemmShape::kM;
        constexpr index_t KPerBlock   = Problem::BlockGemmShape::kK;
        constexpr index_t VecLoadSize = GetVectorSizeA<Problem>();

        // Tile: MPerBlock X KPerBlock
        if constexpr(std::is_same_v<ALayout, ck_tile::tensor_layout::gemm::RowMajor>)
        {
            using TileEncodingPattern = TileDistributionEncodingPattern2D<BlockSize,
                                                                          MPerBlock,
                                                                          KPerBlock,
                                                                          VecLoadSize,
                                                                          ATileAccessPattern>;
            return TileEncodingPattern::Make2DStaticTileDistribution();
        }
        // Tile: KPerBlock X MPerBlock
        else
        {
            using TileEncodingPattern = TileDistributionEncodingPattern2D<BlockSize,
                                                                          KPerBlock,
                                                                          MPerBlock,
                                                                          VecLoadSize,
                                                                          ATileAccessPattern>;
            return TileEncodingPattern::Make2DStaticTileDistribution();
        }
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto MakeBDramTileDistribution()
    {
        using BLayout = remove_cvref_t<typename Problem::BLayout>;

        constexpr index_t BlockSize   = Problem::kBlockSize;
        constexpr index_t NPerBlock   = Problem::BlockGemmShape::kN;
        constexpr index_t KPerBlock   = Problem::BlockGemmShape::kK;
        constexpr index_t VecLoadSize = GetVectorSizeB<Problem>();

        // Tile: KPerBlock X NPerBlock
        if constexpr(std::is_same_v<BLayout, ck_tile::tensor_layout::gemm::RowMajor>)
        {
            using TileEncodingPattern = TileDistributionEncodingPattern2D<BlockSize,
                                                                          KPerBlock,
                                                                          NPerBlock,
                                                                          VecLoadSize,
                                                                          BTileAccessPattern>;
            return TileEncodingPattern::Make2DStaticTileDistribution();
        }
        // Tile: NPerBlock X KPerBlock
        else
        {
            using TileEncodingPattern = TileDistributionEncodingPattern2D<BlockSize,
                                                                          NPerBlock,
                                                                          KPerBlock,
                                                                          VecLoadSize,
                                                                          BTileAccessPattern>;
            return TileEncodingPattern::Make2DStaticTileDistribution();
        }
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto MakeShuffledARegTileDistribution()
    {
        using ALayout = remove_cvref_t<typename Problem::ALayout>;
        static_assert(std::is_same_v<ALayout, ck_tile::tensor_layout::gemm::ColumnMajor>);
        constexpr index_t BlockSize   = Problem::kBlockSize;
        constexpr index_t MPerBlock   = Problem::BlockGemmShape::kN;
        constexpr index_t KPerBlock   = Problem::BlockGemmShape::kK;
        constexpr index_t VecLoadSize = GetVectorSizeA<Problem>();

        using TileEncodingPattern = TileDistributionEncodingPattern2D<BlockSize,
                                                                      KPerBlock,
                                                                      MPerBlock,
                                                                      VecLoadSize,
                                                                      ATileAccessPattern>;
        return TileEncodingPattern::MakeShuffled2DStaticTileDistribution();
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto MakeShuffledBRegTileDistribution()
    {
        using BLayout = remove_cvref_t<typename Problem::BLayout>;
        static_assert(std::is_same_v<BLayout, ck_tile::tensor_layout::gemm::RowMajor>);
        constexpr index_t BlockSize   = Problem::kBlockSize;
        constexpr index_t NPerBlock   = Problem::BlockGemmShape::kN;
        constexpr index_t KPerBlock   = Problem::BlockGemmShape::kK;
        constexpr index_t VecLoadSize = GetVectorSizeB<Problem>();

        using TileEncodingPattern = TileDistributionEncodingPattern2D<BlockSize,
                                                                      KPerBlock,
                                                                      NPerBlock,
                                                                      VecLoadSize,
                                                                      BTileAccessPattern>;
        return TileEncodingPattern::MakeShuffled2DStaticTileDistribution();
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto GetSmemPackA()
    {
        using BlockGemm = remove_cvref_t<decltype(Derived::template GetBlockGemm<Problem>())>;
        constexpr index_t KPack = BlockGemm::Traits::KPack;
        return KPack;
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto GetSmemPackB()
    {
        using BlockGemm = remove_cvref_t<decltype(Derived::template GetBlockGemm<Problem>())>;
        constexpr index_t KPack = BlockGemm::Traits::KPack;
        return KPack;
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr index_t GetSmemSizeA()
    {
        constexpr auto a_lds_desc     = Derived::template MakeALdsBlockDescriptor<Problem>();
        constexpr index_t smem_size_a = integer_least_multiple(
            sizeof(typename Problem::ADataType) * a_lds_desc.get_element_space_size(), 16);
        return smem_size_a;
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr index_t GetSmemSizeB()
    {
        constexpr auto b_lds_desc     = Derived::template MakeBLdsBlockDescriptor<Problem>();
        constexpr index_t smem_size_b = integer_least_multiple(
            sizeof(typename Problem::BDataType) * b_lds_desc.get_element_space_size(), 16);
        return smem_size_b;
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr index_t GetSmemSize()
    {
        constexpr index_t smem_size_a = GetSmemSizeA<Problem>();
        constexpr index_t smem_size_b = GetSmemSizeB<Problem>();

        return smem_size_a + smem_size_b;
    }
};

// UniversalGemm Policy
struct UniversalGemmPipelineAgBgCrPolicy
    : public UniversalGemmBasePolicy<UniversalGemmPipelineAgBgCrPolicy>
{
    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto MakeALdsBlockDescriptor()
    {
        using ADataType = remove_cvref_t<typename Problem::ADataType>;

        constexpr index_t MPerBlock = Problem::BlockGemmShape::kM;
        constexpr index_t KPerBlock = Problem::BlockGemmShape::kK;
        constexpr index_t KPack     = GetSmemPackA<Problem>();

        constexpr auto DataTypeSize = sizeof(ADataType);
        constexpr auto MLdsLayer =
            (32 * 4 / KPerBlock / DataTypeSize) < 1 ? 1 : (32 * 4 / KPerBlock / DataTypeSize);

        constexpr auto a_lds_block_desc_0 = make_naive_tensor_descriptor(
            make_tuple(number<KPerBlock / KPack * MLdsLayer>{},
                       number<MPerBlock / MLdsLayer>{},
                       number<KPack>{}),
            make_tuple(number<KPack>{}, number<KPerBlock * MLdsLayer>{}, number<1>{}),
            number<KPack>{},
            number<1>{});

        constexpr auto a_lds_block_desc_permuted = transform_tensor_descriptor(
            a_lds_block_desc_0,
            make_tuple(make_xor_transform(make_tuple(number<MPerBlock / MLdsLayer>{},
                                                     number<KPerBlock / KPack * MLdsLayer>{})),
                       make_pass_through_transform(number<KPack>{})),
            make_tuple(sequence<1, 0>{}, sequence<2>{}),
            make_tuple(sequence<1, 0>{}, sequence<2>{}));

        constexpr auto a_lds_block_desc_xk0_mnldslayer_mn_xk1 = transform_tensor_descriptor(
            a_lds_block_desc_permuted,
            make_tuple(make_unmerge_transform(
                           make_tuple(number<KPerBlock / KPack>{}, number<MLdsLayer>{})),
                       make_pass_through_transform(number<MPerBlock / MLdsLayer>{}),
                       make_pass_through_transform(number<KPack>{})),
            make_tuple(sequence<0>{}, sequence<1>{}, sequence<2>{}),
            make_tuple(sequence<0, 2>{}, sequence<1>{}, sequence<3>{}));

        constexpr auto a_lds_block_desc = transform_tensor_descriptor(
            a_lds_block_desc_xk0_mnldslayer_mn_xk1,
            make_tuple(make_merge_transform_v3_division_mod(
                           make_tuple(number<MPerBlock / MLdsLayer>{}, number<MLdsLayer>{})),
                       make_merge_transform_v3_division_mod(
                           make_tuple(number<KPerBlock / KPack>{}, number<KPack>{}))),
            make_tuple(sequence<1, 2>{}, sequence<0, 3>{}),
            make_tuple(sequence<0>{}, sequence<1>{}));

        return a_lds_block_desc;
    }

    /**
     * @brief Create LDS block descriptor for B tensor.
     *
     * @tparam Problem  Gemm pipeline problem.
     * @return B tensor LDS block descriptor.
     */
    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto MakeBLdsBlockDescriptor()
    {
        // using BLayout   = remove_cvref_t<typename Problem::BLayout>;
        using BDataType = remove_cvref_t<typename Problem::BDataType>;

        constexpr index_t NPerBlock = Problem::BlockGemmShape::kN;
        constexpr index_t KPerBlock = Problem::BlockGemmShape::kK;

#if 1
        // if constexpr(std::is_same_v<BLayout, ck_tile::tensor_layout::gemm::ColumnMajor>)
        {
            constexpr index_t KPack     = GetSmemPackB<Problem>();
            constexpr auto BK0          = number<KPerBlock / KPack>{};
            constexpr auto DataTypeSize = sizeof(BDataType);
            constexpr auto NLdsLayer =
                (32 * 4 / KPerBlock / DataTypeSize) < 1 ? 1 : (32 * 4 / KPerBlock / DataTypeSize);

            constexpr auto b_lds_block_desc_0 = make_naive_tensor_descriptor(
                make_tuple(
                    BK0 * number<NLdsLayer>{}, number<NPerBlock / NLdsLayer>{}, number<KPack>{}),
                make_tuple(number<KPack>{}, number<KPerBlock * NLdsLayer>{}, number<1>{}),
                number<KPack>{},
                number<1>{});

            constexpr auto b_lds_block_desc_permuted = transform_tensor_descriptor(
                b_lds_block_desc_0,
                make_tuple(make_xor_transform(make_tuple(number<NPerBlock / NLdsLayer>{},
                                                         BK0 * number<NLdsLayer>{})),
                           make_pass_through_transform(number<KPack>{})),
                make_tuple(sequence<1, 0>{}, sequence<2>{}),
                make_tuple(sequence<1, 0>{}, sequence<2>{}));

            constexpr auto b_lds_block_desc_bk0_nldslayer_n_bk1 = transform_tensor_descriptor(
                b_lds_block_desc_permuted,
                make_tuple(make_unmerge_transform(make_tuple(BK0, number<NLdsLayer>{})),
                           make_pass_through_transform(number<NPerBlock / NLdsLayer>{}),
                           make_pass_through_transform(number<KPack>{})),
                make_tuple(sequence<0>{}, sequence<1>{}, sequence<2>{}),
                make_tuple(sequence<0, 2>{}, sequence<1>{}, sequence<3>{}));

            constexpr auto b_lds_block_desc = transform_tensor_descriptor(
                b_lds_block_desc_bk0_nldslayer_n_bk1,
                make_tuple(make_merge_transform_v3_division_mod(
                               make_tuple(number<NPerBlock / NLdsLayer>{}, number<NLdsLayer>{})),
                           make_merge_transform_v3_division_mod(make_tuple(BK0, number<KPack>{}))),
                make_tuple(sequence<1, 2>{}, sequence<0, 3>{}),
                make_tuple(sequence<0>{}, sequence<1>{}));
            return b_lds_block_desc;
        }
#else
        else // B is Row Major
        {
            constexpr index_t BlockSize   = Problem::kBlockSize;
            constexpr index_t VecLoadSize = GetVectorSizeB<Problem>();
            using TileEncodingPattern     = TileDistributionEncodingPattern2D<BlockSize,
                                                                          KPerBlock,
                                                                          NPerBlock,
                                                                          VecLoadSize,
                                                                          BTileAccessPattern>;

            constexpr auto BK0 = number<TileEncodingPattern::X1>{};
            constexpr auto BK1 = number<TileEncodingPattern::Y0>{};
            // constexpr auto N0 = BBlockTransferThreadClusterLengths_BK0_N_BK1{}.At(I1);
            constexpr auto N0 = TileEncodingPattern::X0;
            constexpr auto N1 = NPerBlock / N0;

            using WarpTile         = typename Problem::BlockGemmShape::WarpTile;
            constexpr auto NPerXdl = number<WarpTile::at(I1)>{};

            // constexpr auto KThreadWrite     =
            // BBlockTransferThreadClusterLengths_BK0_N_BK1{}.At(I0);
            constexpr auto KThreadWrite     = TileEncodingPattern::Y2;
            constexpr auto K0PerThreadWrite = BK0 / KThreadWrite;
            constexpr auto KThreadRead      = 64 / NPerXdl;
            constexpr auto K0PerThreadRead  = BK0 / KThreadRead;

            constexpr auto kfold =
                (BK1 * N0 * sizeof(BDataType) > 128) ? 1 : 128 / (BK1 * N0 * sizeof(BDataType));
            constexpr auto KThreadReadPerm =
                (kfold * K0PerThreadWrite / K0PerThreadRead) > 1
                    ? KThreadRead / (kfold * K0PerThreadWrite / K0PerThreadRead)
                    : KThreadRead;

            // 1<=npair<=n0
            constexpr auto npair = (BK1 * NPerXdl * sizeof(BDataType) > 128)
                                       ? 1
                                       : ((128 / (BK1 * NPerXdl * sizeof(BDataType))) > N0
                                              ? N0
                                              : 128 / (BK1 * NPerXdl * sizeof(BDataType)));

            constexpr auto b_lds_block_desc = make_naive_tensor_descriptor_packed(
                make_tuple(number<KThreadWrite / kfold / KThreadReadPerm>{},
                           number<K0PerThreadWrite>{},
                           number<KThreadReadPerm * N1>{},
                           number<kfold * N0 / npair>{},
                           number<npair>{},
                           BK1));

            constexpr auto b_lds_block_desc_permuted = transform_tensor_descriptor(
                b_lds_block_desc,
                make_tuple(
                    make_pass_through_transform(number<KThreadWrite / kfold / KThreadReadPerm>{}),
                    make_pass_through_transform(number<K0PerThreadWrite>{}),
                    make_xor_transform(
                        make_tuple(number<KThreadReadPerm * N1>{}, number<kfold * N0 / npair>{})),
                    make_pass_through_transform(number<npair>{}),
                    make_pass_through_transform(BK1)),
                make_tuple(
                    sequence<0>{}, sequence<1>{}, sequence<2, 3>{}, sequence<4>{}, sequence<5>{}),
                make_tuple(
                    sequence<0>{}, sequence<1>{}, sequence<2, 3>{}, sequence<4>{}, sequence<5>{}));

            constexpr auto b_lds_block_desc_unmerged = transform_tensor_descriptor(
                b_lds_block_desc_permuted,
                make_tuple(
                    make_pass_through_transform(number<KThreadWrite / kfold / KThreadReadPerm>{}),
                    make_pass_through_transform(number<K0PerThreadWrite>{}),
                    make_unmerge_transform(make_tuple(number<KThreadReadPerm>{}, number<N1>{})),
                    make_unmerge_transform(make_tuple(number<kfold>{}, number<N0 / npair>{})),
                    make_pass_through_transform(number<npair>{}),
                    make_pass_through_transform(BK1)),
                make_tuple(sequence<0>{},
                           sequence<1>{},
                           sequence<2>{},
                           sequence<3>{},
                           sequence<4>{},
                           sequence<5>{}),
                make_tuple(sequence<1>{},
                           sequence<2>{},
                           sequence<0, 3>{},
                           sequence<4, 5>{},
                           sequence<6>{},
                           sequence<7>{}));

            // constexpr auto b_lds_block_desc_bk0_n_bk1 = transform_tensor_descriptor(
            //     b_lds_block_desc_unmerged,
            //     make_tuple(make_merge_transform_v3_division_mod(
            //                    make_tuple(number<KThreadReadPerm>{},
            //                               number<KThreadWrite / kfold / KThreadReadPerm>{},
            //                               number<kfold>{},
            //                               number<K0PerThreadWrite>{})),
            //                make_merge_transform_v3_division_mod(
            //                    make_tuple(number<N0 / npair>{}, number<npair>{}, number<N1>{})),
            //                make_pass_through_transform(BK1)),
            //     make_tuple(sequence<0, 1, 4, 2>{}, sequence<5, 6, 3>{}, sequence<7>{}),
            //     make_tuple(sequence<0>{}, sequence<1>{}, sequence<2>{}));

            constexpr auto b_lds_block_desc_kn = transform_tensor_descriptor(
                b_lds_block_desc_unmerged,
                make_tuple(make_merge_transform_v3_division_mod(
                               make_tuple(number<KThreadReadPerm>{},
                                          number<KThreadWrite / kfold / KThreadReadPerm>{},
                                          number<kfold>{},
                                          number<K0PerThreadWrite>{},
                                          BK1)),
                           make_merge_transform_v3_division_mod(
                               make_tuple(number<N0 / npair>{}, number<npair>{}, number<N1>{}))),
                make_tuple(sequence<0, 1, 4, 2, 7>{}, sequence<5, 6, 3>{}),
                make_tuple(sequence<1>{}, sequence<0>{}));

            // return b_lds_block_desc_bk0_n_bk1;
            return b_lds_block_desc_kn;

            // constexpr auto b_lds_block_desc_bk0_n_bk1 = make_naive_tensor_descriptor(
            //     make_tuple(BK0, number<NPerBlock>{}, number<KPack>{}),
            //     make_tuple(number<KPack>{}, number<KPerBlock>{}, number<1>{}),
            //     number<KPack>{},
            //     number<1>{});

            // constexpr auto b_lds_block_desc = transform_tensor_descriptor(
            //     b_lds_block_desc_bk0_n_bk1,
            //     make_tuple(make_pass_through_transform(number<NPerBlock>{}),
            //                make_merge_transform_v3_division_mod(make_tuple(BK0,
            //                number<KPack>{}))),
            //     make_tuple(sequence<1>{}, sequence<0, 2>{}),
            //     make_tuple(sequence<0>{}, sequence<1>{}));

            // return b_lds_block_desc;
        }
#endif
    }

    template <typename Problem>
    CK_TILE_HOST_DEVICE static constexpr auto GetBlockGemm()
    {
        using BlockWarps      = typename Problem::BlockGemmShape::BlockWarps;
        using WarpTile        = typename Problem::BlockGemmShape::WarpTile;
        using WarpGemm        = WarpGemmMfmaDispatcher<typename Problem::ComputeDataType,
                                                typename Problem::ComputeDataType,
                                                typename Problem::CDataType,
                                                WarpTile::at(I0),
                                                WarpTile::at(I1),
                                                WarpTile::at(I2),
                                                Problem::TransposeC>;
        using BlockGemmPolicy = BlockGemmASmemBSmemCRegV1CustomPolicy<typename Problem::ADataType,
                                                                      typename Problem::BDataType,
                                                                      typename Problem::CDataType,
                                                                      BlockWarps,
                                                                      WarpGemm>;
        return BlockUniversalGemmAsBsCr<Problem, BlockGemmPolicy>{};
    }
};

} // namespace ck_tile
