cub/warp/warp_exchange.cuh
File members: cub/warp/warp_exchange.cuh
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#pragma once
#include <cub/config.cuh>
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
#include <cub/util_ptx.cuh>
#include <cub/util_type.cuh>
#include <cub/warp/specializations/warp_exchange_shfl.cuh>
#include <cub/warp/specializations/warp_exchange_smem.cuh>
#include <cuda/std/type_traits>
CUB_NAMESPACE_BEGIN
enum WarpExchangeAlgorithm
{
WARP_EXCHANGE_SMEM,
WARP_EXCHANGE_SHUFFLE,
};
namespace detail
{
template <typename InputT, int ITEMS_PER_THREAD, int LOGICAL_WARP_THREADS, WarpExchangeAlgorithm WARP_EXCHANGE_ALGORITHM>
using InternalWarpExchangeImpl =
::cuda::std::_If<WARP_EXCHANGE_ALGORITHM == WARP_EXCHANGE_SMEM,
WarpExchangeSmem<InputT, ITEMS_PER_THREAD, LOGICAL_WARP_THREADS>,
WarpExchangeShfl<InputT, ITEMS_PER_THREAD, LOGICAL_WARP_THREADS>>;
} // namespace detail
template <typename InputT,
int ITEMS_PER_THREAD,
int LOGICAL_WARP_THREADS = CUB_PTX_WARP_THREADS,
int LEGACY_PTX_ARCH = 0,
WarpExchangeAlgorithm WARP_EXCHANGE_ALGORITHM = WARP_EXCHANGE_SMEM>
class WarpExchange
: private detail::InternalWarpExchangeImpl<InputT, ITEMS_PER_THREAD, LOGICAL_WARP_THREADS, WARP_EXCHANGE_ALGORITHM>
{
using InternalWarpExchange =
detail::InternalWarpExchangeImpl<InputT, ITEMS_PER_THREAD, LOGICAL_WARP_THREADS, WARP_EXCHANGE_ALGORITHM>;
public:
using TempStorage = typename InternalWarpExchange::TempStorage;
WarpExchange() = delete;
explicit _CCCL_DEVICE _CCCL_FORCEINLINE WarpExchange(TempStorage& temp_storage)
: InternalWarpExchange(temp_storage)
{}
template <typename OutputT>
_CCCL_DEVICE _CCCL_FORCEINLINE void
BlockedToStriped(const InputT (&input_items)[ITEMS_PER_THREAD], OutputT (&output_items)[ITEMS_PER_THREAD])
{
InternalWarpExchange::BlockedToStriped(input_items, output_items);
}
template <typename OutputT>
_CCCL_DEVICE _CCCL_FORCEINLINE void
StripedToBlocked(const InputT (&input_items)[ITEMS_PER_THREAD], OutputT (&output_items)[ITEMS_PER_THREAD])
{
InternalWarpExchange::StripedToBlocked(input_items, output_items);
}
template <typename OffsetT>
_CCCL_DEVICE _CCCL_FORCEINLINE void
ScatterToStriped(InputT (&items)[ITEMS_PER_THREAD], OffsetT (&ranks)[ITEMS_PER_THREAD])
{
InternalWarpExchange::ScatterToStriped(items, ranks);
}
template <typename OutputT, typename OffsetT>
_CCCL_DEVICE _CCCL_FORCEINLINE void ScatterToStriped(
const InputT (&input_items)[ITEMS_PER_THREAD],
OutputT (&output_items)[ITEMS_PER_THREAD],
OffsetT (&ranks)[ITEMS_PER_THREAD])
{
InternalWarpExchange::ScatterToStriped(input_items, output_items, ranks);
}
};
CUB_NAMESPACE_END