/home/runner/work/cccl/cccl/cub/cub/device/device_run_length_encode.cuh
File members: /home/runner/work/cccl/cccl/cub/cub/device/device_run_length_encode.cuh
/******************************************************************************
* Copyright (c) 2011, Duane Merrill. All rights reserved.
* Copyright (c) 2011-2022, NVIDIA CORPORATION. All rights reserved.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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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/detail/nvtx.cuh>
#include <cub/device/dispatch/dispatch_reduce_by_key.cuh>
#include <cub/device/dispatch/dispatch_rle.cuh>
#include <cub/device/dispatch/tuning/tuning_run_length_encode.cuh>
#include <cub/util_deprecated.cuh>
#include <iterator>
#include <stdio.h>
CUB_NAMESPACE_BEGIN
struct DeviceRunLengthEncode
{
template <typename InputIteratorT,
typename UniqueOutputIteratorT,
typename LengthsOutputIteratorT,
typename NumRunsOutputIteratorT>
CUB_RUNTIME_FUNCTION _CCCL_FORCEINLINE static cudaError_t Encode(
void* d_temp_storage,
size_t& temp_storage_bytes,
InputIteratorT d_in,
UniqueOutputIteratorT d_unique_out,
LengthsOutputIteratorT d_counts_out,
NumRunsOutputIteratorT d_num_runs_out,
int num_items,
cudaStream_t stream = 0)
{
CUB_DETAIL_NVTX_RANGE_SCOPE_IF(d_temp_storage, "cub::DeviceRunLengthEncode::Encode");
using offset_t = int; // Signed integer type for global offsets
using equality_op = Equality; // Default == operator
using reduction_op = cub::Sum; // Value reduction operator
// The lengths output value type
using length_t = cub::detail::non_void_value_t<LengthsOutputIteratorT, offset_t>;
// Generator type for providing 1s values for run-length reduction
using lengths_input_iterator_t = ConstantInputIterator<length_t, offset_t>;
using accum_t = detail::accumulator_t<reduction_op, length_t, length_t>;
using key_t = cub::detail::non_void_value_t<UniqueOutputIteratorT, cub::detail::value_t<InputIteratorT>>;
using policy_t = detail::device_run_length_encode_policy_hub<accum_t, key_t>;
return DispatchReduceByKey<
InputIteratorT,
UniqueOutputIteratorT,
lengths_input_iterator_t,
LengthsOutputIteratorT,
NumRunsOutputIteratorT,
equality_op,
reduction_op,
offset_t,
accum_t,
policy_t>::Dispatch(d_temp_storage,
temp_storage_bytes,
d_in,
d_unique_out,
lengths_input_iterator_t((length_t) 1),
d_counts_out,
d_num_runs_out,
equality_op(),
reduction_op(),
num_items,
stream);
}
template <typename InputIteratorT,
typename UniqueOutputIteratorT,
typename LengthsOutputIteratorT,
typename NumRunsOutputIteratorT>
CUB_DETAIL_RUNTIME_DEBUG_SYNC_IS_NOT_SUPPORTED CUB_RUNTIME_FUNCTION _CCCL_FORCEINLINE static cudaError_t Encode(
void* d_temp_storage,
size_t& temp_storage_bytes,
InputIteratorT d_in,
UniqueOutputIteratorT d_unique_out,
LengthsOutputIteratorT d_counts_out,
NumRunsOutputIteratorT d_num_runs_out,
int num_items,
cudaStream_t stream,
bool debug_synchronous)
{
CUB_DETAIL_RUNTIME_DEBUG_SYNC_USAGE_LOG
return Encode<InputIteratorT, UniqueOutputIteratorT, LengthsOutputIteratorT, NumRunsOutputIteratorT>(
d_temp_storage, temp_storage_bytes, d_in, d_unique_out, d_counts_out, d_num_runs_out, num_items, stream);
}
template <typename InputIteratorT,
typename OffsetsOutputIteratorT,
typename LengthsOutputIteratorT,
typename NumRunsOutputIteratorT>
CUB_RUNTIME_FUNCTION _CCCL_FORCEINLINE static cudaError_t NonTrivialRuns(
void* d_temp_storage,
size_t& temp_storage_bytes,
InputIteratorT d_in,
OffsetsOutputIteratorT d_offsets_out,
LengthsOutputIteratorT d_lengths_out,
NumRunsOutputIteratorT d_num_runs_out,
int num_items,
cudaStream_t stream = 0)
{
CUB_DETAIL_NVTX_RANGE_SCOPE_IF(d_temp_storage, "cub::DeviceRunLengthEncode::NonTrivialRuns");
using OffsetT = int; // Signed integer type for global offsets
using EqualityOp = Equality; // Default == operator
return DeviceRleDispatch<
InputIteratorT,
OffsetsOutputIteratorT,
LengthsOutputIteratorT,
NumRunsOutputIteratorT,
EqualityOp,
OffsetT>::Dispatch(d_temp_storage,
temp_storage_bytes,
d_in,
d_offsets_out,
d_lengths_out,
d_num_runs_out,
EqualityOp(),
num_items,
stream);
}
template <typename InputIteratorT,
typename OffsetsOutputIteratorT,
typename LengthsOutputIteratorT,
typename NumRunsOutputIteratorT>
CUB_DETAIL_RUNTIME_DEBUG_SYNC_IS_NOT_SUPPORTED CUB_RUNTIME_FUNCTION _CCCL_FORCEINLINE static cudaError_t
NonTrivialRuns(
void* d_temp_storage,
size_t& temp_storage_bytes,
InputIteratorT d_in,
OffsetsOutputIteratorT d_offsets_out,
LengthsOutputIteratorT d_lengths_out,
NumRunsOutputIteratorT d_num_runs_out,
int num_items,
cudaStream_t stream,
bool debug_synchronous)
{
CUB_DETAIL_RUNTIME_DEBUG_SYNC_USAGE_LOG
return NonTrivialRuns<InputIteratorT, OffsetsOutputIteratorT, LengthsOutputIteratorT, NumRunsOutputIteratorT>(
d_temp_storage, temp_storage_bytes, d_in, d_offsets_out, d_lengths_out, d_num_runs_out, num_items, stream);
}
};
CUB_NAMESPACE_END