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/usr/include/c++/11/pstl/glue_numeric_impl.h
$ cat -n /usr/include/c++/11/pstl/glue_numeric_impl.h 1 // -*- C++ -*- 2 //===-- glue_numeric_impl.h -----------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef _PSTL_GLUE_NUMERIC_IMPL_H 11 #define _PSTL_GLUE_NUMERIC_IMPL_H 12 13 #include <functional> 14 15 #include "utils.h" 16 #include "numeric_fwd.h" 17 18 namespace std 19 { 20 21 // [reduce] 22 23 template <class _ExecutionPolicy, class _ForwardIterator, class _Tp, class _BinaryOperation> 24 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _Tp> 25 reduce(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Tp __init, 26 _BinaryOperation __binary_op) 27 { 28 return transform_reduce(std::forward<_ExecutionPolicy>(__exec), __first, __last, __init, __binary_op, 29 __pstl::__internal::__no_op()); 30 } 31 32 template <class _ExecutionPolicy, class _ForwardIterator, class _Tp> 33 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _Tp> 34 reduce(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Tp __init) 35 { 36 return transform_reduce(std::forward<_ExecutionPolicy>(__exec), __first, __last, __init, std::plus<_Tp>(), 37 __pstl::__internal::__no_op()); 38 } 39 40 template <class _ExecutionPolicy, class _ForwardIterator> 41 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, 42 typename iterator_traits<_ForwardIterator>::value_type> 43 reduce(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last) 44 { 45 typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType; 46 return transform_reduce(std::forward<_ExecutionPolicy>(__exec), __first, __last, _ValueType{}, 47 std::plus<_ValueType>(), __pstl::__internal::__no_op()); 48 } 49 50 // [transform.reduce] 51 52 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Tp> 53 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _Tp> 54 transform_reduce(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 55 _ForwardIterator2 __first2, _Tp __init) 56 { 57 typedef typename iterator_traits<_ForwardIterator1>::value_type _InputType; 58 return __pstl::__internal::__pattern_transform_reduce( 59 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __first2, __init, std::plus<_InputType>(), 60 std::multiplies<_InputType>(), 61 __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>( 62 __exec), 63 __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>( 64 __exec)); 65 } 66 67 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Tp, class _BinaryOperation1, 68 class _BinaryOperation2> 69 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _Tp> 70 transform_reduce(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 71 _ForwardIterator2 __first2, _Tp __init, _BinaryOperation1 __binary_op1, _BinaryOperation2 __binary_op2) 72 { 73 return __pstl::__internal::__pattern_transform_reduce( 74 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __first2, __init, __binary_op1, __binary_op2, 75 __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>( 76 __exec), 77 __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>( 78 __exec)); 79 } 80 81 template <class _ExecutionPolicy, class _ForwardIterator, class _Tp, class _BinaryOperation, class _UnaryOperation> 82 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _Tp> 83 transform_reduce(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Tp __init, 84 _BinaryOperation __binary_op, _UnaryOperation __unary_op) 85 { 86 return __pstl::__internal::__pattern_transform_reduce( 87 std::forward<_ExecutionPolicy>(__exec), __first, __last, __init, __binary_op, __unary_op, 88 __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec), 89 __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator>(__exec)); 90 } 91 92 // [exclusive.scan] 93 94 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Tp> 95 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> 96 exclusive_scan(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 97 _ForwardIterator2 __result, _Tp __init) 98 { 99 using namespace __pstl; 100 return __internal::__pattern_transform_scan( 101 std::forward<_ExecutionPolicy>(__exec), __first, __last, __result, __pstl::__internal::__no_op(), __init, 102 std::plus<_Tp>(), /*inclusive=*/std::false_type(), 103 __internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>(__exec), 104 __internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>(__exec)); 105 } 106 107 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Tp, class _BinaryOperation> 108 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> 109 exclusive_scan(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 110 _ForwardIterator2 __result, _Tp __init, _BinaryOperation __binary_op) 111 { 112 using namespace __pstl; 113 return __internal::__pattern_transform_scan( 114 std::forward<_ExecutionPolicy>(__exec), __first, __last, __result, __pstl::__internal::__no_op(), __init, 115 __binary_op, /*inclusive=*/std::false_type(), 116 __internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>(__exec), 117 __internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>(__exec)); 118 } 119 120 // [inclusive.scan] 121 122 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2> 123 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> 124 inclusive_scan(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 125 _ForwardIterator2 __result) 126 { 127 typedef typename iterator_traits<_ForwardIterator1>::value_type _InputType; 128 return transform_inclusive_scan(std::forward<_ExecutionPolicy>(__exec), __first, __last, __result, 129 std::plus<_InputType>(), __pstl::__internal::__no_op()); 130 } 131 132 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryOperation> 133 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> 134 inclusive_scan(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 135 _ForwardIterator2 __result, _BinaryOperation __binary_op) 136 { 137 return transform_inclusive_scan(std::forward<_ExecutionPolicy>(__exec), __first, __last, __result, __binary_op, 138 __pstl::__internal::__no_op()); 139 } 140 141 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Tp, class _BinaryOperation> 142 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> 143 inclusive_scan(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 144 _ForwardIterator2 __result, _BinaryOperation __binary_op, _Tp __init) 145 { 146 return transform_inclusive_scan(std::forward<_ExecutionPolicy>(__exec), __first, __last, __result, __binary_op, 147 __pstl::__internal::__no_op(), __init); 148 } 149 150 // [transform.exclusive.scan] 151 152 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Tp, class _BinaryOperation, 153 class _UnaryOperation> 154 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> 155 transform_exclusive_scan(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 156 _ForwardIterator2 __result, _Tp __init, _BinaryOperation __binary_op, 157 _UnaryOperation __unary_op) 158 { 159 return __pstl::__internal::__pattern_transform_scan( 160 std::forward<_ExecutionPolicy>(__exec), __first, __last, __result, __unary_op, __init, __binary_op, 161 /*inclusive=*/std::false_type(), 162 __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>( 163 __exec), 164 __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>( 165 __exec)); 166 } 167 168 // [transform.inclusive.scan] 169 170 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryOperation, 171 class _UnaryOperation, class _Tp> 172 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> 173 transform_inclusive_scan(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 174 _ForwardIterator2 __result, _BinaryOperation __binary_op, _UnaryOperation __unary_op, 175 _Tp __init) 176 { 177 return __pstl::__internal::__pattern_transform_scan( 178 std::forward<_ExecutionPolicy>(__exec), __first, __last, __result, __unary_op, __init, __binary_op, 179 /*inclusive=*/std::true_type(), 180 __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>( 181 __exec), 182 __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>( 183 __exec)); 184 } 185 186 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _UnaryOperation, 187 class _BinaryOperation> 188 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> 189 transform_inclusive_scan(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 190 _ForwardIterator2 __result, _BinaryOperation __binary_op, _UnaryOperation __unary_op) 191 { 192 if (__first != __last) 193 { 194 auto __tmp = __unary_op(*__first); 195 *__result = __tmp; 196 return transform_inclusive_scan(std::forward<_ExecutionPolicy>(__exec), ++__first, __last, ++__result, 197 __binary_op, __unary_op, __tmp); 198 } 199 else 200 { 201 return __result; 202 } 203 } 204 205 // [adjacent.difference] 206 207 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryOperation> 208 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> 209 adjacent_difference(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 210 _ForwardIterator2 __d_first, _BinaryOperation __op) 211 { 212 213 if (__first == __last) 214 return __d_first; 215 216 return __pstl::__internal::__pattern_adjacent_difference( 217 std::forward<_ExecutionPolicy>(__exec), __first, __last, __d_first, __op, 218 __pstl::__internal::__is_vectorization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>( 219 __exec), 220 __pstl::__internal::__is_parallelization_preferred<_ExecutionPolicy, _ForwardIterator1, _ForwardIterator2>( 221 __exec)); 222 } 223 224 template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2> 225 __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> 226 adjacent_difference(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 227 _ForwardIterator2 __d_first) 228 { 229 typedef typename iterator_traits<_ForwardIterator1>::value_type _ValueType; 230 return adjacent_difference(std::forward<_ExecutionPolicy>(__exec), __first, __last, __d_first, 231 std::minus<_ValueType>()); 232 } 233 234 } // namespace std 235 236 #endif /* _PSTL_GLUE_NUMERIC_IMPL_H_ */
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