cub/thread/thread_sort.cuh
File members: cub/thread/thread_sort.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 <cuda/std/type_traits>
CUB_NAMESPACE_BEGIN
template <typename T>
_CCCL_DEVICE _CCCL_FORCEINLINE void Swap(T& lhs, T& rhs)
{
T temp = lhs;
lhs = rhs;
rhs = temp;
}
template <typename KeyT, typename ValueT, typename CompareOp, int ITEMS_PER_THREAD>
_CCCL_DEVICE _CCCL_FORCEINLINE void
StableOddEvenSort(KeyT (&keys)[ITEMS_PER_THREAD], ValueT (&items)[ITEMS_PER_THREAD], CompareOp compare_op)
{
constexpr bool KEYS_ONLY = ::cuda::std::is_same<ValueT, NullType>::value;
#pragma unroll
for (int i = 0; i < ITEMS_PER_THREAD; ++i)
{
#pragma unroll
for (int j = 1 & i; j < ITEMS_PER_THREAD - 1; j += 2)
{
if (compare_op(keys[j + 1], keys[j]))
{
Swap(keys[j], keys[j + 1]);
if (!KEYS_ONLY)
{
Swap(items[j], items[j + 1]);
}
}
} // inner loop
} // outer loop
}
CUB_NAMESPACE_END