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thread_sort.hpp
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28 
29 #ifndef HIPCUB_ROCPRIM_THREAD_SORT_HPP_
30 #define HIPCUB_ROCPRIM_THREAD_SORT_HPP_
31 
32 #include "../../../config.hpp"
33 
34 #include "../util_ptx.hpp"
35 #include "../util_type.hpp"
36 
37 #include <rocprim/functional.hpp>
38 
39 BEGIN_HIPCUB_NAMESPACE
40 
41 
42 template <typename T>
43 HIPCUB_DEVICE __forceinline__ void Swap(T &lhs, T &rhs)
44 {
45  T temp = lhs;
46  lhs = rhs;
47  rhs = temp;
48 }
49 
50 
80 template <typename KeyT,
81  typename ValueT,
82  typename CompareOp,
83  int ITEMS_PER_THREAD>
84 HIPCUB_DEVICE __forceinline__ void
85 StableOddEvenSort(KeyT (&keys)[ITEMS_PER_THREAD],
86  ValueT (&items)[ITEMS_PER_THREAD],
87  CompareOp compare_op)
88 {
89  constexpr bool KEYS_ONLY = ::rocprim::Equals<ValueT, NullType>::VALUE;
90 
91  #pragma unroll
92  for (int i = 0; i < ITEMS_PER_THREAD; ++i)
93  {
94  #pragma unroll
95  for (int j = 1 & i; j < ITEMS_PER_THREAD - 1; j += 2)
96  {
97  if (compare_op(keys[j + 1], keys[j]))
98  {
99  Swap(keys[j], keys[j + 1]);
100  if (!KEYS_ONLY)
101  {
102  Swap(items[j], items[j + 1]);
103  }
104  }
105  } // inner loop
106  } // outer loop
107 }
108 
109 
110 END_HIPCUB_NAMESPACE
111 
112 #endif // HIPCUB_ROCPRIM_THREAD_SORT_HPP_