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composable_kernel/example/ck_tile/37_transpose/batched_transpose_kernel.hpp
2025-06-18 09:15:28 +00:00

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C++

// SPDX-License-Identifier: MIT
// Copyright (c) 2018-2025, Advanced Micro Devices, Inc. All rights reserved.
#pragma once
#include "ck_tile/core.hpp"
#include "ck_tile/ops/common.hpp"
#include "ck_tile/ops/elementwise.hpp"
#include "ck_tile/host/hip_check_error.hpp"
#include <string>
#include <type_traits>
namespace ck_tile {
struct BatchedTransposeHostArgs
{
const void* p_input;
void* p_output;
index_t batch;
index_t height;
index_t width;
// index_t dim_blocks;
index_t dim_stride;
index_t dim_block_h;
index_t dim_block_w;
};
template <typename Pipeline_>
struct BatchedTransposeKernel
{
using Pipeline = remove_cvref_t<Pipeline_>;
using Problem = remove_cvref_t<typename Pipeline::Problem>;
using Type = typename Problem::DataType;
struct BatchedTransposeKargs
{
const void* p_input;
void* p_output;
index_t batch;
index_t height;
index_t width;
index_t dim_stride;
};
using Kargs = BatchedTransposeKargs;
using Hargs = BatchedTransposeHostArgs;
CK_TILE_HOST static constexpr auto GridSize(const Hargs& h)
{
size_t grid_size_x = h.dim_block_w;
size_t grid_size_y = h.dim_block_h;
size_t grid_size_z = h.batch;
return dim3(grid_size_x, grid_size_y, grid_size_z);
}
CK_TILE_HOST static constexpr auto MakeKargs(const Hargs& h)
{
Kargs k;
k.p_input = h.p_input;
k.p_output = h.p_output;
k.batch = h.batch;
k.height = h.height;
k.width = h.width;
k.dim_stride = h.dim_stride;
return k;
}
CK_TILE_HOST_DEVICE static constexpr auto BlockSize() { return Problem::kBlockSize; }
CK_TILE_DEVICE void operator()(Kargs kargs) const
{
__shared__ char smem[Pipeline::GetSmemSize()];
static constexpr ck_tile::index_t kMPerBlock = Problem::kSecondSizePerBlock;
static constexpr ck_tile::index_t kNPerBlock = Problem::kLeadSizePerBlock;
const auto iDim = blockIdx.z;
const auto x_m_n = [&]() {
const auto x_dram_naive = make_naive_tensor_view<address_space_enum::global>(
static_cast<const Type*>(kargs.p_input) + iDim * kargs.dim_stride,
make_tuple(kargs.height, kargs.width),
make_tuple(kargs.width, 1),
number<Pipeline::GetVectorSize()>{},
number<1>{});
return pad_tensor_view(x_dram_naive,
make_tuple(number<kMPerBlock>{}, number<kNPerBlock>{}),
sequence<false, false>{});
}();
const auto iM = __builtin_amdgcn_readfirstlane(blockIdx.y * kMPerBlock);
const auto iN = __builtin_amdgcn_readfirstlane(blockIdx.x * kNPerBlock);
const auto y_n_m = [&]() {
const auto y_dram_naive = make_naive_tensor_view<address_space_enum::global>(
static_cast<Type*>(kargs.p_output) + iDim * kargs.dim_stride,
make_tuple(kargs.width, kargs.height),
make_tuple(kargs.height, 1),
number<Pipeline::GetVectorSize()>{},
number<1>{});
return pad_tensor_view(y_dram_naive,
make_tuple(number<kNPerBlock>{}, number<kMPerBlock>{}),
sequence<false, false>{});
}();
auto x_block_window = make_tile_window(
x_m_n,
make_tuple(number<kMPerBlock>{}, number<kNPerBlock>{}),
{static_cast<ck_tile::index_t>(iM), static_cast<ck_tile::index_t>(iN)});
auto y_block_window = make_tile_window(
y_n_m,
make_tuple(number<kNPerBlock>{}, number<kMPerBlock>{}),
{static_cast<ck_tile::index_t>(iN), static_cast<ck_tile::index_t>(iM)});
Pipeline{}(x_block_window, y_block_window, smem);
}
};
} // namespace ck_tile