mirror of
https://github.com/ROCm/composable_kernel.git
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634 lines
26 KiB
C++
634 lines
26 KiB
C++
// SPDX-License-Identifier: MIT
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// Copyright (c) 2018-2025, Advanced Micro Devices, Inc. All rights reserved.
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#pragma once
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#include <iostream>
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#include <string>
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#include "ck_tile/core.hpp"
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#include "ck_tile/ops/common.hpp"
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#include "ck_tile/ops/gemm/pipeline/gemm_pipeline_ag_bg_cr_scheduler.hpp"
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namespace ck_tile {
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template <index_t NumDTensor = 0>
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struct FlatmmHostArgs
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{
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CK_TILE_HOST FlatmmHostArgs() = default;
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CK_TILE_HOST FlatmmHostArgs(const void* a_ptr_,
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const void* b_ptr_,
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const std::array<const void*, NumDTensor>& ds_ptr_,
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void* e_ptr_,
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index_t k_batch_,
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index_t M_,
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index_t N_,
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index_t K_,
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index_t stride_A_,
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index_t stride_B_,
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const std::array<index_t, NumDTensor>& stride_Ds_,
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index_t stride_E_)
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: a_ptr(a_ptr_),
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b_ptr(b_ptr_),
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ds_ptr(ds_ptr_),
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e_ptr(e_ptr_),
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M(M_),
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N(N_),
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K(K_),
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stride_A(stride_A_),
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stride_B(stride_B_),
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stride_Ds(stride_Ds_),
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stride_E(stride_E_),
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k_batch(k_batch_)
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{
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}
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const void* a_ptr;
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const void* b_ptr;
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const std::array<const void*, NumDTensor> ds_ptr;
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union
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{
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void* e_ptr;
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void* c_ptr;
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};
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index_t M;
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index_t N;
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index_t K;
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index_t stride_A;
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index_t stride_B;
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const std::array<index_t, NumDTensor> stride_Ds;
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union
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{
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index_t stride_E;
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index_t stride_C;
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};
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index_t k_batch;
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};
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template <index_t NumDTensor = 0>
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struct FlatmmKernelArgs
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{
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const void* a_ptr;
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// const void* b_shuffle_ptr;
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const void* b_ptr;
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const std::array<const void*, NumDTensor> ds_ptr;
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void* e_ptr;
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index_t M;
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index_t N;
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index_t K;
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index_t stride_A;
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index_t stride_B;
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std::array<index_t, NumDTensor> stride_Ds;
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index_t stride_E;
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index_t k_batch;
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};
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template <typename TilePartitioner_, typename FlatmmPipeline_, typename EpiloguePipeline_>
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struct FlatmmKernel
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{
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using TilePartitioner = remove_cvref_t<TilePartitioner_>;
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using FlatmmPipeline = remove_cvref_t<FlatmmPipeline_>;
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using BlockGemmShape =
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remove_cvref_t<typename FlatmmPipeline::BlockGemmShape>; // TileFlatmmShape
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using EpiloguePipeline = remove_cvref_t<EpiloguePipeline_>;
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using ALayout = remove_cvref_t<typename FlatmmPipeline::ALayout>;
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using BLayout = remove_cvref_t<typename FlatmmPipeline::BLayout>;
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using ELayout = remove_cvref_t<typename FlatmmPipeline::CLayout>;
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using DsLayout = remove_cvref_t<typename EpiloguePipeline::DsLayout>;
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using DsDataType = remove_cvref_t<typename EpiloguePipeline::DsDataType>;
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static constexpr index_t kBlockSize = FlatmmPipeline::BlockSize;
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using ADataType = remove_cvref_t<typename FlatmmPipeline::ADataType>;
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using BDataType = remove_cvref_t<typename FlatmmPipeline::BDataType>;
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// Below type is actually accumulation data type - the output of block GEMM.
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using EDataType = remove_cvref_t<typename EpiloguePipeline::ODataType>;
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static constexpr index_t NumDTensor = DsDataType::size();
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static constexpr auto I0 = number<0>();
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static constexpr auto I1 = number<1>();
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static constexpr auto I2 = number<2>();
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static constexpr auto I3 = number<3>();
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static_assert(DsLayout::size() == DsDataType::size(),
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"The size of DsLayout and DsDataType should be the same");
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using KernelArgs = FlatmmKernelArgs<DsLayout::size()>;
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[[nodiscard]] CK_TILE_HOST static const std::string GetName()
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{
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// clang-format off
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return concat('_', "gemm", gemm_prec_str<ADataType, BDataType>, FlatmmPipeline::GetName());
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// clang-format on
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}
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CK_TILE_HOST static constexpr auto GridSize(index_t M, index_t N, index_t KBatch)
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{
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return dim3(TilePartitioner::GridSize(M, N), 1, KBatch);
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}
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CK_TILE_HOST static constexpr auto BlockSize()
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{
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return is_wave32() ? dim3(kBlockSize / 2) : dim3(kBlockSize);
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}
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CK_TILE_HOST static constexpr KernelArgs
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MakeKernelArgs(const FlatmmHostArgs<NumDTensor>& hostArgs)
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{
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return KernelArgs{hostArgs.a_ptr,
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hostArgs.b_ptr,
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hostArgs.ds_ptr,
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hostArgs.e_ptr,
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hostArgs.M,
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hostArgs.N,
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hostArgs.K,
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hostArgs.stride_A,
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hostArgs.stride_B,
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hostArgs.stride_Ds,
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hostArgs.stride_E,
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hostArgs.k_batch};
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}
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CK_TILE_HOST_DEVICE static constexpr index_t GetSmemSize()
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{
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return max(FlatmmPipeline::GetSmemSize(), EpiloguePipeline::GetSmemSize());
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}
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struct SplitKBatchOffset
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{
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__device__ SplitKBatchOffset(const KernelArgs& kargs, const std::size_t k_id = blockIdx.z)
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{
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constexpr auto K1 = TilePartitioner::BlockGemmShape::WarpTile::at(number<2>{});
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const index_t K_t = kargs.k_batch * K1;
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const index_t KRead = (kargs.K + K_t - 1) / K_t * K1;
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if constexpr(std::is_same_v<tensor_layout::gemm::RowMajor, ALayout>)
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{
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a_k_split_offset = k_id * KRead;
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}
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else if constexpr(std::is_same_v<tensor_layout::gemm::ColumnMajor, ALayout>)
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{
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a_k_split_offset = k_id * KRead * kargs.stride_A;
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}
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if constexpr(std::is_same_v<tensor_layout::gemm::RowMajor, BLayout>)
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{
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b_k_split_offset = k_id * KRead * kargs.stride_B;
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}
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else if constexpr(std::is_same_v<tensor_layout::gemm::ColumnMajor, BLayout>)
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{
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b_k_split_offset = k_id * KRead;
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}
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if(k_id < static_cast<uint32_t>(kargs.k_batch - 1))
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{
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splitted_k = KRead;
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}
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else
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{
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splitted_k = kargs.K - KRead * (kargs.k_batch - 1);
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}
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}
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index_t a_k_split_offset;
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index_t b_k_split_offset;
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index_t splitted_k;
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};
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CK_TILE_HOST static bool IsSupportedArgument(const KernelArgs& kargs)
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{
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if constexpr(EpiloguePipeline::GetVectorSizeC() % 2 != 0 &&
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is_any_of<EDataType, fp16_t, bf16_t>::value)
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{
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if(kargs.k_batch != 1)
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{
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std::cerr << "Conditions not met for Kbatch >1 !" << std::endl;
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return false;
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}
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}
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if constexpr(std::is_same_v<ALayout, tensor_layout::gemm::RowMajor>)
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{
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if(kargs.K % TilePartitioner::KPerBlock != 0 && FlatmmPipeline::kPadK == false)
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{
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std::cerr << "Can't support K that is not a multiple of KPerBlock"
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" without padding!"
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<< std::endl;
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return false;
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}
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if(kargs.K % FlatmmPipeline::GetVectorSizeA() != 0)
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{
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std::cerr << "K is not a multiple of vector load size for A tensor!" << std::endl;
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return false;
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}
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}
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else
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{
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if(kargs.M % TilePartitioner::MPerBlock != 0 && FlatmmPipeline::kPadM == false)
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{
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std::cerr << "Can't support M that is not a multiple of MPerBlock"
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" without padding!"
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<< std::endl;
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return false;
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}
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if(kargs.M % FlatmmPipeline::GetVectorSizeA() != 0)
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{
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std::cerr << "M is not a multiple of vector load size for A tensor!" << std::endl;
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return false;
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}
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}
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if constexpr(std::is_same_v<BLayout, tensor_layout::gemm::RowMajor>)
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{
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if(kargs.N % TilePartitioner::NPerBlock != 0 && FlatmmPipeline::kPadN == false)
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{
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std::cerr << "Can't support N that is not a multiple of NPerBlock"
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" without padding!"
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<< std::endl;
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return false;
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}
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if(kargs.N % FlatmmPipeline::GetVectorSizeB() != 0)
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{
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std::cerr << "N is not a multiple of vector load size for B tensor!" << std::endl;
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return false;
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}
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}
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else
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{
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if(kargs.K % TilePartitioner::KPerBlock != 0 && FlatmmPipeline::kPadK == false)
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{
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std::cerr << "Can't support K that is not a multiple of KPerBlock"
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" without padding!"
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<< std::endl;
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return false;
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}
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if(kargs.K % FlatmmPipeline::GetVectorSizeB() != 0)
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{
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std::cerr << "K is not a multiple of vector load size for B tensor!" << std::endl;
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return false;
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}
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}
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bool DTesnorIsValid = {true};
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static_for<0, NumDTensor, 1>{}([&](auto index) {
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using DiLayout = remove_cvref_t<std::tuple_element_t<index.value, DsLayout>>;
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if(std::is_same_v<DiLayout, ELayout> == false)
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{
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DTesnorIsValid = false;
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}
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if constexpr(std::is_same_v<DiLayout, tensor_layout::gemm::RowMajor>)
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{
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if(kargs.N % TilePartitioner::NPerBlock != 0 && FlatmmPipeline::kPadN == false)
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{
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CK_TILE_ERROR("Can't support N for tensor D that is not a multiple of "
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"NPerBlock without padding!");
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DTesnorIsValid = false;
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}
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if(kargs.N % EpiloguePipeline::GetVectorSizeD(index) != 0)
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{
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CK_TILE_ERROR("N is not a multiple of vector load size for D tensor!");
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DTesnorIsValid = false;
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}
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}
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else
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{
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if(kargs.M % TilePartitioner::MPerBlock != 0 && FlatmmPipeline::kPadM == false)
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{
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CK_TILE_ERROR("Can't support M for tensor D that is not a multiple of "
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"MPerBlock without padding!");
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DTesnorIsValid = false;
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}
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if(kargs.M % EpiloguePipeline::GetVectorSizeD(index) != 0)
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{
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CK_TILE_ERROR("M is not a multiple of vector load size for D tensor!");
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DTesnorIsValid = false;
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}
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}
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});
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if constexpr(std::is_same_v<ELayout, tensor_layout::gemm::RowMajor>)
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{
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if(kargs.N % TilePartitioner::NPerBlock != 0 && FlatmmPipeline::kPadN == false)
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{
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std::cerr << "Can't support N that is not a multiple of NPerBlock"
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" without padding!"
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<< std::endl;
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return false;
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}
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if(kargs.N % EpiloguePipeline::GetVectorSizeC() != 0)
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{
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std::cerr << "N is not a multiple of vector load size for C tensor!" << std::endl;
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return false;
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}
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}
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else
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{
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if(kargs.M % TilePartitioner::MPerBlock != 0 && FlatmmPipeline::kPadM == false)
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{
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std::cerr << "Can't support M that is not a multiple of MPerBlock"
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" without padding!"
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<< std::endl;
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return false;
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}
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if(kargs.M % EpiloguePipeline::GetVectorSizeC() != 0)
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{
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std::cerr << "M is not a multiple of vector load size for C tensor!" << std::endl;
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return false;
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}
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}
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return DTesnorIsValid;
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}
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template <memory_operation_enum DstInMemOp = memory_operation_enum::set>
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CK_TILE_DEVICE static auto
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MakeGemmTensorViews(const ADataType* a_ptr,
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const BDataType* b_flat_ptr,
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const std::array<const void*, NumDTensor>& ds_ptr,
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EDataType* e_ptr,
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const KernelArgs& kargs,
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const SplitKBatchOffset& splitk_batch_offset)
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{
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const auto& a_tensor_view = [&]() {
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if constexpr(std::is_same_v<ALayout, tensor_layout::gemm::RowMajor>)
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{
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return make_naive_tensor_view<address_space_enum::global>(
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a_ptr,
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make_tuple(kargs.M, splitk_batch_offset.splitted_k),
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make_tuple(kargs.stride_A, 1),
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number<FlatmmPipeline::GetVectorSizeA()>{},
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number<1>{});
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}
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else
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{
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return make_naive_tensor_view<address_space_enum::global>(
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a_ptr,
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make_tuple(splitk_batch_offset.splitted_k, kargs.M),
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make_tuple(kargs.stride_A, 1),
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number<FlatmmPipeline::GetVectorSizeA()>{},
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number<1>{});
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}
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}();
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index_t kFlatK = FlatmmPipeline::flatKPerWarp * (splitk_batch_offset.splitted_k /
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BlockGemmShape::WarpTile::at(number<2>{}));
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index_t kFlatN = kargs.N * kargs.K / kFlatK;
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const auto& b_flat_tensor_view = [&]() {
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return make_naive_tensor_view<address_space_enum::global>(
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b_flat_ptr,
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make_tuple(kFlatN, kFlatK),
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make_tuple(kFlatK, 1),
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number<FlatmmPipeline::GetVectorSizeB()>{},
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number<1>{});
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}();
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const auto& ds_tensor_view = generate_tuple(
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[&](auto i) {
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using DiLayout = remove_cvref_t<std::tuple_element_t<i.value, DsLayout>>;
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using DDataType_ = remove_cvref_t<std::tuple_element_t<i.value, DsDataType>>;
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if constexpr(std::is_same_v<DiLayout, tensor_layout::gemm::RowMajor>)
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{
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return make_naive_tensor_view<address_space_enum::global>(
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static_cast<const DDataType_*>(ds_ptr[i]),
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make_tuple(kargs.M, kargs.N),
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make_tuple(kargs.stride_Ds[i], 1),
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number<EpiloguePipeline::GetVectorSizeD(i)>{},
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number<1>{});
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}
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else
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{
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return make_naive_tensor_view<address_space_enum::global>(
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static_cast<const DDataType_*>(ds_ptr[i]),
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make_tuple(kargs.N, kargs.M),
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make_tuple(kargs.stride_Ds[i], 1),
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number<EpiloguePipeline::GetVectorSizeD(i)>{},
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number<1>{});
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}
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},
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number<NumDTensor>{});
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// TODO: enable vector write for C in ColMajor
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const auto& e_tensor_view = [&]() {
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if constexpr(std::is_same_v<ELayout, tensor_layout::gemm::RowMajor>)
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{
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return make_naive_tensor_view<address_space_enum::global>(
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e_ptr,
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make_tuple(kargs.M, kargs.N),
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make_tuple(kargs.stride_E, 1),
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number<EpiloguePipeline::GetVectorSizeC()>{},
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number<1>{});
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}
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else
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{
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return make_naive_tensor_view<address_space_enum::global>(
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e_ptr,
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make_tuple(kargs.N, kargs.M),
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make_tuple(kargs.stride_E, 1),
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number<1>{},
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number<1>{});
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}
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}();
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return make_tuple(a_tensor_view, b_flat_tensor_view, ds_tensor_view, e_tensor_view);
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}
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template <typename TensorView>
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CK_TILE_DEVICE static auto MakeGemmPadViews(const TensorView& views)
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{
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const auto& a_pad_view = [&]() {
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const auto& a_tensor_view = views.at(I0);
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if constexpr(std::is_same_v<ALayout, tensor_layout::gemm::RowMajor>)
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{
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return pad_tensor_view(a_tensor_view,
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make_tuple(number<TilePartitioner::MPerBlock>{},
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number<TilePartitioner::KPerBlock>{}),
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sequence<false, FlatmmPipeline::kPadK>{});
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}
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else
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{
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return pad_tensor_view(a_tensor_view,
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make_tuple(number<TilePartitioner::KPerBlock>{},
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number<TilePartitioner::MPerBlock>{}),
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sequence<false, FlatmmPipeline::kPadM>{});
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}
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}();
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const auto& b_flat_tensor_view = views.at(I1);
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const auto& ds_pad_view = generate_tuple(
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[&](auto i) {
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const auto& d_tensor_view = views.at(I2);
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using DiLayout = remove_cvref_t<std::tuple_element_t<i.value, DsLayout>>;
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if constexpr(std::is_same_v<DiLayout, tensor_layout::gemm::RowMajor>)
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{
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return pad_tensor_view(d_tensor_view[i],
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make_tuple(number<TilePartitioner::MPerBlock>{},
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number<TilePartitioner::NPerBlock>{}),
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sequence<false, FlatmmPipeline::kPadN>{});
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}
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else
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{
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return pad_tensor_view(d_tensor_view[i],
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make_tuple(number<TilePartitioner::NPerBlock>{},
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number<TilePartitioner::MPerBlock>{}),
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sequence<false, FlatmmPipeline::kPadM>{});
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}
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},
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number<NumDTensor>{});
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// TODO vector write in for C in ColMajor
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const auto& e_pad_view = [&]() {
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const auto& e_tensor_view = views.at(I3);
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if constexpr(std::is_same_v<ELayout, tensor_layout::gemm::RowMajor>)
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{
|
|
return pad_tensor_view(e_tensor_view,
|
|
make_tuple(number<TilePartitioner::MPerBlock>{},
|
|
number<TilePartitioner::NPerBlock>{}),
|
|
sequence<false, FlatmmPipeline::kPadN>{});
|
|
}
|
|
else
|
|
{
|
|
return pad_tensor_view(e_tensor_view,
|
|
make_tuple(number<TilePartitioner::MPerBlock>{},
|
|
number<TilePartitioner::NPerBlock>{}),
|
|
sequence<FlatmmPipeline::kPadM, false>{});
|
|
}
|
|
}();
|
|
|
|
return make_tuple(a_pad_view, b_flat_tensor_view, ds_pad_view, e_pad_view);
|
|
}
|
|
|
|
template <typename PadView>
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|
CK_TILE_DEVICE static auto
|
|
MakeGemmTileWindows(const PadView& views, const index_t i_m, const index_t i_n)
|
|
{
|
|
const auto& a_pad_view = views.at(I0);
|
|
const auto& b_flat_pad_view = views.at(I1);
|
|
const auto& ds_pad_view = views.at(I2);
|
|
const auto& e_pad_view = views.at(I3);
|
|
|
|
const auto& a_block_window = [&]() {
|
|
if constexpr(std::is_same_v<ALayout, tensor_layout::gemm::RowMajor>)
|
|
{
|
|
return make_tile_window(a_pad_view,
|
|
make_tuple(number<TilePartitioner::MPerBlock>{},
|
|
number<TilePartitioner::KPerBlock>{}),
|
|
{i_m, 0});
|
|
}
|
|
else
|
|
{
|
|
return make_tile_window(a_pad_view,
|
|
make_tuple(number<TilePartitioner::KPerBlock>{},
|
|
number<TilePartitioner::MPerBlock>{}),
|
|
{0, i_m});
|
|
}
|
|
}();
|
|
|
|
const auto& b_flat_block_window =
|
|
make_tile_window(b_flat_pad_view,
|
|
make_tuple(number<FlatmmPipeline::flatNPerWarp>{},
|
|
number<FlatmmPipeline::flatKPerWarp>{}),
|
|
{static_cast<int>(i_n / BlockGemmShape::WarpTile::at(I1)), 0});
|
|
|
|
const auto ds_block_window = generate_tuple(
|
|
[&](auto i) {
|
|
using DiLayout = remove_cvref_t<std::tuple_element_t<i.value, DsLayout>>;
|
|
if constexpr(std::is_same_v<DiLayout, tensor_layout::gemm::RowMajor>)
|
|
{
|
|
return make_tile_window(ds_pad_view[i],
|
|
make_tuple(number<TilePartitioner::MPerBlock>{},
|
|
number<TilePartitioner::NPerBlock>{}),
|
|
{i_m, i_n});
|
|
}
|
|
else
|
|
{
|
|
return make_tile_window(ds_pad_view[i],
|
|
make_tuple(number<TilePartitioner::NPerBlock>{},
|
|
number<TilePartitioner::MPerBlock>{}),
|
|
{i_n, i_m});
|
|
}
|
|
},
|
|
number<NumDTensor>{});
|
|
|
|
auto e_block_window = make_tile_window(
|
|
e_pad_view,
|
|
make_tuple(number<TilePartitioner::MPerBlock>{}, number<TilePartitioner::NPerBlock>{}),
|
|
{i_m, i_n});
|
|
|
|
return make_tuple(a_block_window, b_flat_block_window, ds_block_window, e_block_window);
|
|
}
|
|
|
|
template <bool UseDefaultScheduler = true>
|
|
CK_TILE_DEVICE static void RunFlatmm(const ADataType* a_ptr,
|
|
const BDataType* b_flat_ptr,
|
|
const std::array<const void*, NumDTensor>& ds_ptr,
|
|
EDataType* e_ptr,
|
|
void* smem_ptr,
|
|
const KernelArgs& kargs,
|
|
const SplitKBatchOffset& splitk_batch_offset,
|
|
const index_t block_idx_m,
|
|
const index_t block_idx_n)
|
|
{
|
|
// Create Gemm tensor views, pad views and tile windows
|
|
const auto& gemm_tensor_views_tuple =
|
|
MakeGemmTensorViews<EpiloguePipeline::MemoryOperation>(
|
|
a_ptr, b_flat_ptr, ds_ptr, e_ptr, kargs, splitk_batch_offset);
|
|
const auto& gemm_pad_views = MakeGemmPadViews(gemm_tensor_views_tuple);
|
|
auto gemm_tile_windows = MakeGemmTileWindows(gemm_pad_views, block_idx_m, block_idx_n);
|
|
|
|
const index_t num_loop = TilePartitioner::GetLoopNum(splitk_batch_offset.splitted_k);
|
|
|
|
// Run GEMM cooperatively by whole workgroup.
|
|
const auto& a_block_window = gemm_tile_windows.at(I0);
|
|
const auto& b_flat_block_window = gemm_tile_windows.at(I1);
|
|
const auto& d_block_window = gemm_tile_windows.at(I2);
|
|
const auto& c_block_tile = FlatmmPipeline{}.template operator()(
|
|
a_block_window, b_flat_block_window, num_loop, smem_ptr);
|
|
if(UseDefaultScheduler || (get_warp_id() == 0))
|
|
{
|
|
// Run Epilogue Pipeline
|
|
auto& c_block_window = gemm_tile_windows.at(I3);
|
|
|
|
EpiloguePipeline{}.template
|
|
operator()<decltype(c_block_window), decltype(c_block_tile), decltype(d_block_window)>(
|
|
c_block_window, c_block_tile, d_block_window, smem_ptr);
|
|
}
|
|
}
|
|
|
|
CK_TILE_DEVICE void operator()(KernelArgs kargs) const
|
|
{
|
|
const auto [iM, iN] = TilePartitioner{kargs.M, kargs.N}.GetOutputTileIndex(blockIdx.x);
|
|
const index_t i_m = __builtin_amdgcn_readfirstlane(iM * TilePartitioner::MPerBlock);
|
|
const index_t i_n = __builtin_amdgcn_readfirstlane(iN * TilePartitioner::NPerBlock);
|
|
|
|
const SplitKBatchOffset splitk_batch_offset(kargs);
|
|
// options
|
|
const ADataType* a_ptr =
|
|
static_cast<const ADataType*>(kargs.a_ptr) + splitk_batch_offset.a_k_split_offset;
|
|
const BDataType* b_flat_ptr =
|
|
static_cast<const BDataType*>(kargs.b_ptr) + splitk_batch_offset.b_k_split_offset;
|
|
EDataType* e_ptr = static_cast<EDataType*>(kargs.e_ptr);
|
|
|
|
// allocate LDS
|
|
__shared__ char smem_ptr[GetSmemSize()];
|
|
|
|
if constexpr(!(EpiloguePipeline::MemoryOperation == memory_operation_enum::atomic_add &&
|
|
EpiloguePipeline::GetVectorSizeC() % 2 != 0 &&
|
|
is_any_of<EDataType, fp16_t, bf16_t>::value))
|
|
{
|
|
constexpr auto scheduler_type = (FlatmmPipeline::NumWaveGroups == 1);
|
|
RunFlatmm<scheduler_type>(a_ptr,
|
|
b_flat_ptr,
|
|
kargs.ds_ptr,
|
|
e_ptr,
|
|
smem_ptr,
|
|
kargs,
|
|
splitk_batch_offset,
|
|
i_m,
|
|
i_n);
|
|
}
|
|
}
|
|
};
|
|
|
|
} // namespace ck_tile
|