1// -*- C++ -*- 2//===-- algorithm_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_ALGORITHM_IMPL_H 11#define _PSTL_ALGORITHM_IMPL_H 12 13#include <iterator> 14#include <type_traits> 15#include <utility> 16#include <functional> 17#include <algorithm> 18 19#include "execution_impl.h" 20#include "memory_impl.h" 21#include "parallel_backend_utils.h" 22#include "parallel_backend.h" 23#include "parallel_impl.h" 24#include "unseq_backend_simd.h" 25 26 27namespace __pstl 28{ 29namespace __internal 30{ 31 32//------------------------------------------------------------------------ 33// any_of 34//------------------------------------------------------------------------ 35 36template <class _ForwardIterator, class _Pred> 37bool 38__brick_any_of(const _ForwardIterator __first, const _ForwardIterator __last, _Pred __pred, 39 /*__is_vector=*/std::false_type) noexcept 40{ 41 return std::any_of(__first, __last, __pred); 42}; 43 44template <class _ForwardIterator, class _Pred> 45bool 46__brick_any_of(const _ForwardIterator __first, const _ForwardIterator __last, _Pred __pred, 47 /*__is_vector=*/std::true_type) noexcept 48{ 49 return __unseq_backend::__simd_or(__first, __last - __first, __pred); 50}; 51 52template <class _ExecutionPolicy, class _ForwardIterator, class _Pred, class _IsVector> 53bool 54__pattern_any_of(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Pred __pred, 55 _IsVector __is_vector, /*parallel=*/std::false_type) noexcept 56{ 57 return __internal::__brick_any_of(__first, __last, __pred, __is_vector); 58} 59 60template <class _ExecutionPolicy, class _ForwardIterator, class _Pred, class _IsVector> 61bool 62__pattern_any_of(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Pred __pred, 63 _IsVector __is_vector, /*parallel=*/std::true_type) 64{ 65 return __internal::__except_handler([&]() { 66 return __internal::__parallel_or(std::forward<_ExecutionPolicy>(__exec), __first, __last, 67 [__pred, __is_vector](_ForwardIterator __i, _ForwardIterator __j) { 68 return __internal::__brick_any_of(__i, __j, __pred, __is_vector); 69 }); 70 }); 71} 72 73// [alg.foreach] 74// for_each_n with no policy 75 76template <class _ForwardIterator, class _Size, class _Function> 77_ForwardIterator 78__for_each_n_it_serial(_ForwardIterator __first, _Size __n, _Function __f) 79{ 80 for (; __n > 0; ++__first, --__n) 81 __f(__first); 82 return __first; 83} 84 85//------------------------------------------------------------------------ 86// walk1 (pseudo) 87// 88// walk1 evaluates f(x) for each dereferenced value x drawn from [first,last) 89//------------------------------------------------------------------------ 90template <class _ForwardIterator, class _Function> 91void 92__brick_walk1(_ForwardIterator __first, _ForwardIterator __last, _Function __f, /*vector=*/std::false_type) noexcept 93{ 94 std::for_each(__first, __last, __f); 95} 96 97template <class _RandomAccessIterator, class _Function> 98void 99__brick_walk1(_RandomAccessIterator __first, _RandomAccessIterator __last, _Function __f, 100 /*vector=*/std::true_type) noexcept 101{ 102 __unseq_backend::__simd_walk_1(__first, __last - __first, __f); 103} 104 105template <class _ExecutionPolicy, class _ForwardIterator, class _Function, class _IsVector> 106void 107__pattern_walk1(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Function __f, 108 _IsVector __is_vector, 109 /*parallel=*/std::false_type) noexcept 110{ 111 __internal::__brick_walk1(__first, __last, __f, __is_vector); 112} 113 114template <class _ExecutionPolicy, class _ForwardIterator, class _Function, class _IsVector> 115void 116__pattern_walk1(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Function __f, 117 _IsVector __is_vector, 118 /*parallel=*/std::true_type) 119{ 120 __internal::__except_handler([&]() { 121 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __first, __last, 122 [__f, __is_vector](_ForwardIterator __i, _ForwardIterator __j) { 123 __internal::__brick_walk1(__i, __j, __f, __is_vector); 124 }); 125 }); 126} 127 128template <class _ExecutionPolicy, class _ForwardIterator, class _Brick> 129void 130__pattern_walk_brick(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Brick __brick, 131 /*parallel=*/std::false_type) noexcept 132{ 133 __brick(__first, __last); 134} 135 136template <class _ExecutionPolicy, class _ForwardIterator, class _Brick> 137void 138__pattern_walk_brick(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Brick __brick, 139 /*parallel=*/std::true_type) 140{ 141 __internal::__except_handler([&]() { 142 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __first, __last, 143 [__brick](_ForwardIterator __i, _ForwardIterator __j) { __brick(__i, __j); }); 144 }); 145} 146 147//------------------------------------------------------------------------ 148// walk1_n 149//------------------------------------------------------------------------ 150template <class _ForwardIterator, class _Size, class _Function> 151_ForwardIterator 152__brick_walk1_n(_ForwardIterator __first, _Size __n, _Function __f, /*_IsVectorTag=*/std::false_type) 153{ 154 return __internal::__for_each_n_it_serial(__first, __n, 155 [&__f](_ForwardIterator __it) { __f(*__it); }); // calling serial version 156} 157 158template <class _RandomAccessIterator, class _DifferenceType, class _Function> 159_RandomAccessIterator 160__brick_walk1_n(_RandomAccessIterator __first, _DifferenceType __n, _Function __f, 161 /*vectorTag=*/std::true_type) noexcept 162{ 163 return __unseq_backend::__simd_walk_1(__first, __n, __f); 164} 165 166template <class _ExecutionPolicy, class _ForwardIterator, class _Size, class _Function, class _IsVector> 167_ForwardIterator 168__pattern_walk1_n(_ExecutionPolicy&&, _ForwardIterator __first, _Size __n, _Function __f, _IsVector __is_vector, 169 /*is_parallel=*/std::false_type) noexcept 170{ 171 return __internal::__brick_walk1_n(__first, __n, __f, __is_vector); 172} 173 174template <class _ExecutionPolicy, class _RandomAccessIterator, class _Size, class _Function, class _IsVector> 175_RandomAccessIterator 176__pattern_walk1_n(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _Size __n, _Function __f, 177 _IsVector __is_vector, 178 /*is_parallel=*/std::true_type) 179{ 180 __internal::__pattern_walk1(std::forward<_ExecutionPolicy>(__exec), __first, __first + __n, __f, __is_vector, 181 std::true_type()); 182 return __first + __n; 183} 184 185template <class _ExecutionPolicy, class _ForwardIterator, class _Size, class _Brick> 186_ForwardIterator 187__pattern_walk_brick_n(_ExecutionPolicy&&, _ForwardIterator __first, _Size __n, _Brick __brick, 188 /*is_parallel=*/std::false_type) noexcept 189{ 190 return __brick(__first, __n); 191} 192 193template <class _ExecutionPolicy, class _RandomAccessIterator, class _Size, class _Brick> 194_RandomAccessIterator 195__pattern_walk_brick_n(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _Size __n, _Brick __brick, 196 /*is_parallel=*/std::true_type) 197{ 198 return __internal::__except_handler([&]() { 199 __par_backend::__parallel_for( 200 std::forward<_ExecutionPolicy>(__exec), __first, __first + __n, 201 [__brick](_RandomAccessIterator __i, _RandomAccessIterator __j) { __brick(__i, __j - __i); }); 202 return __first + __n; 203 }); 204} 205 206//------------------------------------------------------------------------ 207// walk2 (pseudo) 208// 209// walk2 evaluates f(x,y) for deferenced values (x,y) drawn from [first1,last1) and [first2,...) 210//------------------------------------------------------------------------ 211template <class _ForwardIterator1, class _ForwardIterator2, class _Function> 212_ForwardIterator2 213__brick_walk2(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _Function __f, 214 /*vector=*/std::false_type) noexcept 215{ 216 for (; __first1 != __last1; ++__first1, ++__first2) 217 __f(*__first1, *__first2); 218 return __first2; 219} 220 221template <class _ForwardIterator1, class _ForwardIterator2, class _Function> 222_ForwardIterator2 223__brick_walk2(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _Function __f, 224 /*vector=*/std::true_type) noexcept 225{ 226 return __unseq_backend::__simd_walk_2(__first1, __last1 - __first1, __first2, __f); 227} 228 229template <class _ForwardIterator1, class _Size, class _ForwardIterator2, class _Function> 230_ForwardIterator2 231__brick_walk2_n(_ForwardIterator1 __first1, _Size __n, _ForwardIterator2 __first2, _Function __f, 232 /*vector=*/std::false_type) noexcept 233{ 234 for (; __n > 0; --__n, ++__first1, ++__first2) 235 __f(*__first1, *__first2); 236 return __first2; 237} 238 239template <class _ForwardIterator1, class _Size, class _ForwardIterator2, class _Function> 240_ForwardIterator2 241__brick_walk2_n(_ForwardIterator1 __first1, _Size __n, _ForwardIterator2 __first2, _Function __f, 242 /*vector=*/std::true_type) noexcept 243{ 244 return __unseq_backend::__simd_walk_2(__first1, __n, __first2, __f); 245} 246 247template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Function, class _IsVector> 248_ForwardIterator2 249__pattern_walk2(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 250 _Function __f, _IsVector __is_vector, /*parallel=*/std::false_type) noexcept 251{ 252 return __internal::__brick_walk2(__first1, __last1, __first2, __f, __is_vector); 253} 254 255template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Function, class _IsVector> 256_ForwardIterator2 257__pattern_walk2(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 258 _ForwardIterator2 __first2, _Function __f, _IsVector __is_vector, /*parallel=*/std::true_type) 259{ 260 return __internal::__except_handler([&]() { 261 __par_backend::__parallel_for( 262 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, 263 [__f, __first1, __first2, __is_vector](_ForwardIterator1 __i, _ForwardIterator1 __j) { 264 __internal::__brick_walk2(__i, __j, __first2 + (__i - __first1), __f, __is_vector); 265 }); 266 return __first2 + (__last1 - __first1); 267 }); 268} 269 270template <class _ExecutionPolicy, class _ForwardIterator1, class _Size, class _ForwardIterator2, class _Function, 271 class _IsVector> 272_ForwardIterator2 273__pattern_walk2_n(_ExecutionPolicy&&, _ForwardIterator1 __first1, _Size __n, _ForwardIterator2 __first2, _Function __f, 274 _IsVector __is_vector, /*parallel=*/std::false_type) noexcept 275{ 276 return __internal::__brick_walk2_n(__first1, __n, __first2, __f, __is_vector); 277} 278 279template <class _ExecutionPolicy, class _RandomAccessIterator1, class _Size, class _RandomAccessIterator2, 280 class _Function, class _IsVector> 281_RandomAccessIterator2 282__pattern_walk2_n(_ExecutionPolicy&& __exec, _RandomAccessIterator1 __first1, _Size __n, _RandomAccessIterator2 __first2, 283 _Function __f, _IsVector __is_vector, /*parallel=*/std::true_type) 284{ 285 return __internal::__pattern_walk2(std::forward<_ExecutionPolicy>(__exec), __first1, __first1 + __n, __first2, __f, 286 __is_vector, std::true_type()); 287} 288 289template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Brick> 290_ForwardIterator2 291__pattern_walk2_brick(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 292 _ForwardIterator2 __first2, _Brick __brick, /*parallel=*/std::false_type) noexcept 293{ 294 return __brick(__first1, __last1, __first2); 295} 296 297template <class _ExecutionPolicy, class _RandomAccessIterator1, class _RandomAccessIterator2, class _Brick> 298_RandomAccessIterator2 299__pattern_walk2_brick(_ExecutionPolicy&& __exec, _RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 300 _RandomAccessIterator2 __first2, _Brick __brick, /*parallel=*/std::true_type) 301{ 302 return __internal::__except_handler([&]() { 303 __par_backend::__parallel_for( 304 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, 305 [__first1, __first2, __brick](_RandomAccessIterator1 __i, _RandomAccessIterator1 __j) { 306 __brick(__i, __j, __first2 + (__i - __first1)); 307 }); 308 return __first2 + (__last1 - __first1); 309 }); 310} 311 312template <class _ExecutionPolicy, class _RandomAccessIterator1, class _Size, class _RandomAccessIterator2, class _Brick> 313_RandomAccessIterator2 314__pattern_walk2_brick_n(_ExecutionPolicy&& __exec, _RandomAccessIterator1 __first1, _Size __n, 315 _RandomAccessIterator2 __first2, _Brick __brick, /*parallel=*/std::true_type) 316{ 317 return __internal::__except_handler([&]() { 318 __par_backend::__parallel_for( 319 std::forward<_ExecutionPolicy>(__exec), __first1, __first1 + __n, 320 [__first1, __first2, __brick](_RandomAccessIterator1 __i, _RandomAccessIterator1 __j) { 321 __brick(__i, __j - __i, __first2 + (__i - __first1)); 322 }); 323 return __first2 + __n; 324 }); 325} 326 327template <class _ExecutionPolicy, class _ForwardIterator1, class _Size, class _ForwardIterator2, class _Brick> 328_ForwardIterator2 329__pattern_walk2_brick_n(_ExecutionPolicy&&, _ForwardIterator1 __first1, _Size __n, _ForwardIterator2 __first2, 330 _Brick __brick, /*parallel=*/std::false_type) noexcept 331{ 332 return __brick(__first1, __n, __first2); 333} 334 335//------------------------------------------------------------------------ 336// walk3 (pseudo) 337// 338// walk3 evaluates f(x,y,z) for (x,y,z) drawn from [first1,last1), [first2,...), [first3,...) 339//------------------------------------------------------------------------ 340template <class _ForwardIterator1, class _ForwardIterator2, class _ForwardIterator3, class _Function> 341_ForwardIterator3 342__brick_walk3(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 343 _ForwardIterator3 __first3, _Function __f, /*vector=*/std::false_type) noexcept 344{ 345 for (; __first1 != __last1; ++__first1, ++__first2, ++__first3) 346 __f(*__first1, *__first2, *__first3); 347 return __first3; 348} 349 350template <class _RandomAccessIterator1, class _RandomAccessIterator2, class _RandomAccessIterator3, class _Function> 351_RandomAccessIterator3 352__brick_walk3(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, _RandomAccessIterator2 __first2, 353 _RandomAccessIterator3 __first3, _Function __f, /*vector=*/std::true_type) noexcept 354{ 355 return __unseq_backend::__simd_walk_3(__first1, __last1 - __first1, __first2, __first3, __f); 356} 357 358template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _ForwardIterator3, 359 class _Function, class _IsVector> 360_ForwardIterator3 361__pattern_walk3(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 362 _ForwardIterator3 __first3, _Function __f, _IsVector __is_vector, /*parallel=*/std::false_type) noexcept 363{ 364 return __internal::__brick_walk3(__first1, __last1, __first2, __first3, __f, __is_vector); 365} 366 367template <class _ExecutionPolicy, class _RandomAccessIterator1, class _RandomAccessIterator2, 368 class _RandomAccessIterator3, class _Function, class _IsVector> 369_RandomAccessIterator3 370__pattern_walk3(_ExecutionPolicy&& __exec, _RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 371 _RandomAccessIterator2 __first2, _RandomAccessIterator3 __first3, _Function __f, _IsVector __is_vector, 372 /*parallel=*/std::true_type) 373{ 374 return __internal::__except_handler([&]() { 375 __par_backend::__parallel_for( 376 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, 377 [__f, __first1, __first2, __first3, __is_vector](_RandomAccessIterator1 __i, _RandomAccessIterator1 __j) { 378 __internal::__brick_walk3(__i, __j, __first2 + (__i - __first1), __first3 + (__i - __first1), __f, 379 __is_vector); 380 }); 381 return __first3 + (__last1 - __first1); 382 }); 383} 384 385//------------------------------------------------------------------------ 386// equal 387//------------------------------------------------------------------------ 388 389template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 390bool 391__brick_equal(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 392 _ForwardIterator2 __last2, _BinaryPredicate __p, /* IsVector = */ std::false_type) noexcept 393{ 394 return std::equal(__first1, __last1, __first2, __last2, __p); 395} 396 397template <class _RandomAccessIterator1, class _RandomAccessIterator2, class _BinaryPredicate> 398bool 399__brick_equal(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, _RandomAccessIterator2 __first2, 400 _RandomAccessIterator2 __last2, _BinaryPredicate __p, /* is_vector = */ std::true_type) noexcept 401{ 402 if (__last1 - __first1 != __last2 - __first2) 403 return false; 404 405 return __unseq_backend::__simd_first(__first1, __last1 - __first1, __first2, std::not_fn(__p)).first == __last1; 406} 407 408template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate, 409 class _IsVector> 410bool 411__pattern_equal(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 412 _ForwardIterator2 __last2, _BinaryPredicate __p, _IsVector __is_vector, /* is_parallel = */ 413 std::false_type) noexcept 414{ 415 return __internal::__brick_equal(__first1, __last1, __first2, __last2, __p, __is_vector); 416} 417 418template <class _ExecutionPolicy, class _RandomAccessIterator1, class _RandomAccessIterator2, class _BinaryPredicate, 419 class _IsVector> 420bool 421__pattern_equal(_ExecutionPolicy&& __exec, _RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 422 _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __p, 423 _IsVector __is_vector, /*is_parallel=*/std::true_type) 424{ 425 if (__last1 - __first1 != __last2 - __first2) 426 return false; 427 428 return __internal::__except_handler([&]() { 429 return !__internal::__parallel_or( 430 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, 431 [__first1, __first2, __p, __is_vector](_RandomAccessIterator1 __i, _RandomAccessIterator1 __j) { 432 return !__internal::__brick_equal(__i, __j, __first2 + (__i - __first1), __first2 + (__j - __first1), 433 __p, __is_vector); 434 }); 435 }); 436} 437 438//------------------------------------------------------------------------ 439// equal version for sequences with equal length 440//------------------------------------------------------------------------ 441 442template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 443bool 444__brick_equal(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _BinaryPredicate __p, 445 /* IsVector = */ std::false_type) noexcept 446{ 447 return std::equal(__first1, __last1, __first2, __p); 448} 449 450template <class _RandomAccessIterator1, class _RandomAccessIterator2, class _BinaryPredicate> 451bool 452__brick_equal(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, _RandomAccessIterator2 __first2, 453 _BinaryPredicate __p, /* is_vector = */ std::true_type) noexcept 454{ 455 return __unseq_backend::__simd_first(__first1, __last1 - __first1, __first2, std::not_fn(__p)).first == __last1; 456} 457 458template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate, 459 class _IsVector> 460bool 461__pattern_equal(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 462 _BinaryPredicate __p, _IsVector __is_vector, /* is_parallel = */ std::false_type) noexcept 463{ 464 return __internal::__brick_equal(__first1, __last1, __first2, __p, __is_vector); 465} 466 467template <class _ExecutionPolicy, class _RandomAccessIterator1, class _RandomAccessIterator2, class _BinaryPredicate, 468 class _IsVector> 469bool 470__pattern_equal(_ExecutionPolicy&& __exec, _RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 471 _RandomAccessIterator2 __first2, _BinaryPredicate __p, _IsVector __is_vector, 472 /*is_parallel=*/std::true_type) 473{ 474 return __internal::__except_handler([&]() { 475 return !__internal::__parallel_or( 476 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, 477 [__first1, __first2, __p, __is_vector](_RandomAccessIterator1 __i, _RandomAccessIterator1 __j) { 478 return !__internal::__brick_equal(__i, __j, __first2 + (__i - __first1), __p, __is_vector); 479 }); 480 }); 481} 482 483//------------------------------------------------------------------------ 484// find_if 485//------------------------------------------------------------------------ 486template <class _ForwardIterator, class _Predicate> 487_ForwardIterator 488__brick_find_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 489 /*is_vector=*/std::false_type) noexcept 490{ 491 return std::find_if(__first, __last, __pred); 492} 493 494template <class _RandomAccessIterator, class _Predicate> 495_RandomAccessIterator 496__brick_find_if(_RandomAccessIterator __first, _RandomAccessIterator __last, _Predicate __pred, 497 /*is_vector=*/std::true_type) noexcept 498{ 499 typedef typename std::iterator_traits<_RandomAccessIterator>::difference_type _SizeType; 500 return __unseq_backend::__simd_first( 501 __first, _SizeType(0), __last - __first, 502 [&__pred](_RandomAccessIterator __it, _SizeType __i) { return __pred(__it[__i]); }); 503} 504 505template <class _ExecutionPolicy, class _ForwardIterator, class _Predicate, class _IsVector> 506_ForwardIterator 507__pattern_find_if(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 508 _IsVector __is_vector, 509 /*is_parallel=*/std::false_type) noexcept 510{ 511 return __internal::__brick_find_if(__first, __last, __pred, __is_vector); 512} 513 514template <class _ExecutionPolicy, class _ForwardIterator, class _Predicate, class _IsVector> 515_ForwardIterator 516__pattern_find_if(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 517 _IsVector __is_vector, 518 /*is_parallel=*/std::true_type) 519{ 520 return __internal::__except_handler([&]() { 521 return __internal::__parallel_find( 522 std::forward<_ExecutionPolicy>(__exec), __first, __last, 523 [__pred, __is_vector](_ForwardIterator __i, _ForwardIterator __j) { 524 return __internal::__brick_find_if(__i, __j, __pred, __is_vector); 525 }, 526 std::less<typename std::iterator_traits<_ForwardIterator>::difference_type>(), 527 /*is_first=*/true); 528 }); 529} 530 531//------------------------------------------------------------------------ 532// find_end 533//------------------------------------------------------------------------ 534 535// find the first occurrence of the subsequence [s_first, s_last) 536// or the last occurrence of the subsequence in the range [first, last) 537// b_first determines what occurrence we want to find (first or last) 538template <class _RandomAccessIterator1, class _RandomAccessIterator2, class _BinaryPredicate, class _IsVector> 539_RandomAccessIterator1 540__find_subrange(_RandomAccessIterator1 __first, _RandomAccessIterator1 __last, _RandomAccessIterator1 __global_last, 541 _RandomAccessIterator2 __s_first, _RandomAccessIterator2 __s_last, _BinaryPredicate __pred, 542 bool __b_first, _IsVector __is_vector) noexcept 543{ 544 typedef typename std::iterator_traits<_RandomAccessIterator2>::value_type _ValueType; 545 auto __n2 = __s_last - __s_first; 546 if (__n2 < 1) 547 { 548 return __b_first ? __first : __last; 549 } 550 551 auto __n1 = __global_last - __first; 552 if (__n1 < __n2) 553 { 554 return __last; 555 } 556 557 auto __cur = __last; 558 while (__first != __last && (__global_last - __first >= __n2)) 559 { 560 // find position of *s_first in [first, last) (it can be start of subsequence) 561 __first = __internal::__brick_find_if( 562 __first, __last, __equal_value_by_pred<_ValueType, _BinaryPredicate>(*__s_first, __pred), __is_vector); 563 564 // if position that was found previously is the start of subsequence 565 // then we can exit the loop (b_first == true) or keep the position 566 // (b_first == false) 567 if (__first != __last && (__global_last - __first >= __n2) && 568 __internal::__brick_equal(__s_first + 1, __s_last, __first + 1, __pred, __is_vector)) 569 { 570 if (__b_first) 571 { 572 return __first; 573 } 574 else 575 { 576 __cur = __first; 577 } 578 } 579 else if (__first == __last) 580 { 581 break; 582 } 583 else 584 { 585 } 586 587 // in case of b_first == false we try to find new start position 588 // for the next subsequence 589 ++__first; 590 } 591 return __cur; 592} 593 594template <class _RandomAccessIterator, class _Size, class _Tp, class _BinaryPredicate, class _IsVector> 595_RandomAccessIterator 596__find_subrange(_RandomAccessIterator __first, _RandomAccessIterator __last, _RandomAccessIterator __global_last, 597 _Size __count, const _Tp& __value, _BinaryPredicate __pred, _IsVector __is_vector) noexcept 598{ 599 if (static_cast<_Size>(__global_last - __first) < __count || __count < 1) 600 { 601 return __last; // According to the standard last shall be returned when count < 1 602 } 603 604 auto __unary_pred = __equal_value_by_pred<_Tp, _BinaryPredicate>(__value, __pred); 605 while (__first != __last && (static_cast<_Size>(__global_last - __first) >= __count)) 606 { 607 __first = __internal::__brick_find_if(__first, __last, __unary_pred, __is_vector); 608 609 // check that all of elements in [first+1, first+count) equal to value 610 if (__first != __last && (static_cast<_Size>(__global_last - __first) >= __count) && 611 !__internal::__brick_any_of(__first + 1, __first + __count, std::not_fn(__unary_pred), __is_vector)) 612 { 613 return __first; 614 } 615 else if (__first == __last) 616 { 617 break; 618 } 619 else 620 { 621 ++__first; 622 } 623 } 624 return __last; 625} 626 627template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 628_ForwardIterator1 629__brick_find_end(_ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __s_first, 630 _ForwardIterator2 __s_last, _BinaryPredicate __pred, /*__is_vector=*/std::false_type) noexcept 631{ 632 return std::find_end(__first, __last, __s_first, __s_last, __pred); 633} 634 635template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 636_ForwardIterator1 637__brick_find_end(_ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __s_first, 638 _ForwardIterator2 __s_last, _BinaryPredicate __pred, /*__is_vector=*/std::true_type) noexcept 639{ 640 return __find_subrange(__first, __last, __last, __s_first, __s_last, __pred, false, std::true_type()); 641} 642 643template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate, 644 class _IsVector> 645_ForwardIterator1 646__pattern_find_end(_ExecutionPolicy&&, _ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __s_first, 647 _ForwardIterator2 __s_last, _BinaryPredicate __pred, _IsVector __is_vector, 648 /*is_parallel=*/std::false_type) noexcept 649{ 650 return __internal::__brick_find_end(__first, __last, __s_first, __s_last, __pred, __is_vector); 651} 652 653template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate, 654 class _IsVector> 655_ForwardIterator1 656__pattern_find_end(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 657 _ForwardIterator2 __s_first, _ForwardIterator2 __s_last, _BinaryPredicate __pred, 658 _IsVector __is_vector, /*is_parallel=*/std::true_type) noexcept 659{ 660 if (__last - __first == __s_last - __s_first) 661 { 662 const bool __res = __internal::__pattern_equal(std::forward<_ExecutionPolicy>(__exec), __first, __last, 663 __s_first, __pred, __is_vector, std::true_type()); 664 return __res ? __first : __last; 665 } 666 else 667 { 668 return __internal::__except_handler([&]() { 669 return __internal::__parallel_find( 670 std::forward<_ExecutionPolicy>(__exec), __first, __last, 671 [__last, __s_first, __s_last, __pred, __is_vector](_ForwardIterator1 __i, _ForwardIterator1 __j) { 672 return __internal::__find_subrange(__i, __j, __last, __s_first, __s_last, __pred, false, 673 __is_vector); 674 }, 675 std::greater<typename std::iterator_traits<_ForwardIterator1>::difference_type>(), /*is_first=*/false); 676 }); 677 } 678} 679 680//------------------------------------------------------------------------ 681// find_first_of 682//------------------------------------------------------------------------ 683template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 684_ForwardIterator1 685__brick_find_first_of(_ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __s_first, 686 _ForwardIterator2 __s_last, _BinaryPredicate __pred, /*__is_vector=*/std::false_type) noexcept 687{ 688 return std::find_first_of(__first, __last, __s_first, __s_last, __pred); 689} 690 691template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 692_ForwardIterator1 693__brick_find_first_of(_ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __s_first, 694 _ForwardIterator2 __s_last, _BinaryPredicate __pred, /*__is_vector=*/std::true_type) noexcept 695{ 696 return __unseq_backend::__simd_find_first_of(__first, __last, __s_first, __s_last, __pred); 697} 698 699template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate, 700 class _IsVector> 701_ForwardIterator1 702__pattern_find_first_of(_ExecutionPolicy&&, _ForwardIterator1 __first, _ForwardIterator1 __last, 703 _ForwardIterator2 __s_first, _ForwardIterator2 __s_last, _BinaryPredicate __pred, 704 _IsVector __is_vector, /*is_parallel=*/std::false_type) noexcept 705{ 706 return __internal::__brick_find_first_of(__first, __last, __s_first, __s_last, __pred, __is_vector); 707} 708 709template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate, 710 class _IsVector> 711_ForwardIterator1 712__pattern_find_first_of(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 713 _ForwardIterator2 __s_first, _ForwardIterator2 __s_last, _BinaryPredicate __pred, 714 _IsVector __is_vector, /*is_parallel=*/std::true_type) noexcept 715{ 716 return __internal::__except_handler([&]() { 717 return __internal::__parallel_find( 718 std::forward<_ExecutionPolicy>(__exec), __first, __last, 719 [__s_first, __s_last, __pred, __is_vector](_ForwardIterator1 __i, _ForwardIterator1 __j) { 720 return __internal::__brick_find_first_of(__i, __j, __s_first, __s_last, __pred, __is_vector); 721 }, 722 std::less<typename std::iterator_traits<_ForwardIterator1>::difference_type>(), /*is_first=*/true); 723 }); 724} 725 726//------------------------------------------------------------------------ 727// search 728//------------------------------------------------------------------------ 729template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 730_ForwardIterator1 731__brick_search(_ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __s_first, 732 _ForwardIterator2 __s_last, _BinaryPredicate __pred, /*vector=*/std::false_type) noexcept 733{ 734 return std::search(__first, __last, __s_first, __s_last, __pred); 735} 736 737template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 738_ForwardIterator1 739__brick_search(_ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __s_first, 740 _ForwardIterator2 __s_last, _BinaryPredicate __pred, /*vector=*/std::true_type) noexcept 741{ 742 return __internal::__find_subrange(__first, __last, __last, __s_first, __s_last, __pred, true, std::true_type()); 743} 744 745template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate, 746 class _IsVector> 747_ForwardIterator1 748__pattern_search(_ExecutionPolicy&&, _ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __s_first, 749 _ForwardIterator2 __s_last, _BinaryPredicate __pred, _IsVector __is_vector, 750 /*is_parallel=*/std::false_type) noexcept 751{ 752 return __internal::__brick_search(__first, __last, __s_first, __s_last, __pred, __is_vector); 753} 754 755template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate, 756 class _IsVector> 757_ForwardIterator1 758__pattern_search(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, 759 _ForwardIterator2 __s_first, _ForwardIterator2 __s_last, _BinaryPredicate __pred, 760 _IsVector __is_vector, 761 /*is_parallel=*/std::true_type) noexcept 762{ 763 if (__last - __first == __s_last - __s_first) 764 { 765 const bool __res = __internal::__pattern_equal(std::forward<_ExecutionPolicy>(__exec), __first, __last, 766 __s_first, __pred, __is_vector, std::true_type()); 767 return __res ? __first : __last; 768 } 769 else 770 { 771 return __internal::__except_handler([&]() { 772 return __internal::__parallel_find( 773 std::forward<_ExecutionPolicy>(__exec), __first, __last, 774 [__last, __s_first, __s_last, __pred, __is_vector](_ForwardIterator1 __i, _ForwardIterator1 __j) { 775 return __internal::__find_subrange(__i, __j, __last, __s_first, __s_last, __pred, true, 776 __is_vector); 777 }, 778 std::less<typename std::iterator_traits<_ForwardIterator1>::difference_type>(), /*is_first=*/true); 779 }); 780 } 781} 782 783//------------------------------------------------------------------------ 784// search_n 785//------------------------------------------------------------------------ 786template <class _ForwardIterator, class _Size, class _Tp, class _BinaryPredicate> 787_ForwardIterator 788__brick_search_n(_ForwardIterator __first, _ForwardIterator __last, _Size __count, const _Tp& __value, 789 _BinaryPredicate __pred, /*vector=*/std::false_type) noexcept 790{ 791 return std::search_n(__first, __last, __count, __value, __pred); 792} 793 794template <class _ForwardIterator, class _Size, class _Tp, class _BinaryPredicate> 795_ForwardIterator 796__brick_search_n(_ForwardIterator __first, _ForwardIterator __last, _Size __count, const _Tp& __value, 797 _BinaryPredicate __pred, /*vector=*/std::true_type) noexcept 798{ 799 return __internal::__find_subrange(__first, __last, __last, __count, __value, __pred, std::true_type()); 800} 801 802template <class _ExecutionPolicy, class _ForwardIterator, class _Size, class _Tp, class _BinaryPredicate, 803 class _IsVector> 804_ForwardIterator 805__pattern_search_n(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Size __count, 806 const _Tp& __value, _BinaryPredicate __pred, _IsVector __is_vector, 807 /*is_parallel=*/std::false_type) noexcept 808{ 809 return __internal::__brick_search_n(__first, __last, __count, __value, __pred, __is_vector); 810} 811 812template <class _ExecutionPolicy, class _RandomAccessIterator, class _Size, class _Tp, class _BinaryPredicate, 813 class _IsVector> 814_RandomAccessIterator 815__pattern_search_n(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, 816 _Size __count, const _Tp& __value, _BinaryPredicate __pred, _IsVector __is_vector, 817 /*is_parallel=*/std::true_type) noexcept 818{ 819 if (static_cast<_Size>(__last - __first) == __count) 820 { 821 const bool __result = !__internal::__pattern_any_of( 822 std::forward<_ExecutionPolicy>(__exec), __first, __last, 823 [&__value, &__pred](const _Tp& __val) { return !__pred(__val, __value); }, __is_vector, 824 /*is_parallel*/ std::true_type()); 825 return __result ? __first : __last; 826 } 827 else 828 { 829 return __internal::__except_handler([&__exec, __first, __last, __count, &__value, __pred, __is_vector]() { 830 return __internal::__parallel_find( 831 std::forward<_ExecutionPolicy>(__exec), __first, __last, 832 [__last, __count, &__value, __pred, __is_vector](_RandomAccessIterator __i, _RandomAccessIterator __j) { 833 return __internal::__find_subrange(__i, __j, __last, __count, __value, __pred, __is_vector); 834 }, 835 std::less<typename std::iterator_traits<_RandomAccessIterator>::difference_type>(), /*is_first=*/true); 836 }); 837 } 838} 839 840//------------------------------------------------------------------------ 841// copy_n 842//------------------------------------------------------------------------ 843 844template <class _ForwardIterator, class _Size, class _OutputIterator> 845_OutputIterator 846__brick_copy_n(_ForwardIterator __first, _Size __n, _OutputIterator __result, /*vector=*/std::false_type) noexcept 847{ 848 return std::copy_n(__first, __n, __result); 849} 850 851template <class _ForwardIterator, class _Size, class _OutputIterator> 852_OutputIterator 853__brick_copy_n(_ForwardIterator __first, _Size __n, _OutputIterator __result, /*vector=*/std::true_type) noexcept 854{ 855 return __unseq_backend::__simd_assign( 856 __first, __n, __result, [](_ForwardIterator __first, _OutputIterator __result) { *__result = *__first; }); 857} 858 859//------------------------------------------------------------------------ 860// copy 861//------------------------------------------------------------------------ 862template <class _ForwardIterator, class _OutputIterator> 863_OutputIterator 864__brick_copy(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, 865 /*vector=*/std::false_type) noexcept 866{ 867 return std::copy(__first, __last, __result); 868} 869 870template <class _RandomAccessIterator, class _OutputIterator> 871_OutputIterator 872__brick_copy(_RandomAccessIterator __first, _RandomAccessIterator __last, _OutputIterator __result, 873 /*vector=*/std::true_type) noexcept 874{ 875 return __unseq_backend::__simd_assign( 876 __first, __last - __first, __result, 877 [](_RandomAccessIterator __first, _OutputIterator __result) { *__result = *__first; }); 878} 879 880//------------------------------------------------------------------------ 881// move 882//------------------------------------------------------------------------ 883template <class _ForwardIterator, class _OutputIterator> 884_OutputIterator 885__brick_move(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, 886 /*vector=*/std::false_type) noexcept 887{ 888 return std::move(__first, __last, __result); 889} 890 891template <class _RandomAccessIterator, class _OutputIterator> 892_OutputIterator 893__brick_move(_RandomAccessIterator __first, _RandomAccessIterator __last, _OutputIterator __result, 894 /*vector=*/std::true_type) noexcept 895{ 896 return __unseq_backend::__simd_assign( 897 __first, __last - __first, __result, 898 [](_RandomAccessIterator __first, _OutputIterator __result) { *__result = std::move(*__first); }); 899} 900 901struct __brick_move_destroy 902{ 903 template <typename _Iterator, typename _OutputIterator> 904 _OutputIterator 905 operator()(_Iterator __first, _Iterator __last, _OutputIterator __result, /*vec*/ std::true_type) const 906 { 907 using _IteratorValueType = typename std::iterator_traits<_Iterator>::value_type; 908 909 return __unseq_backend::__simd_assign(__first, __last - __first, __result, 910 [](_Iterator __first, _OutputIterator __result) { 911 *__result = std::move(*__first); 912 (*__first).~_IteratorValueType(); 913 }); 914 } 915 916 template <typename _Iterator, typename _OutputIterator> 917 _OutputIterator 918 operator()(_Iterator __first, _Iterator __last, _OutputIterator __result, /*vec*/ std::false_type) const 919 { 920 using _IteratorValueType = typename std::iterator_traits<_Iterator>::value_type; 921 922 for (; __first != __last; ++__first, ++__result) 923 { 924 *__result = std::move(*__first); 925 (*__first).~_IteratorValueType(); 926 } 927 return __result; 928 } 929}; 930 931//------------------------------------------------------------------------ 932// swap_ranges 933//------------------------------------------------------------------------ 934template <class _ForwardIterator, class _OutputIterator> 935_OutputIterator 936__brick_swap_ranges(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, 937 /*vector=*/std::false_type) noexcept 938{ 939 return std::swap_ranges(__first, __last, __result); 940} 941 942template <class _ForwardIterator, class _OutputIterator> 943_OutputIterator 944__brick_swap_ranges(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, 945 /*vector=*/std::true_type) noexcept 946{ 947 using std::iter_swap; 948 return __unseq_backend::__simd_assign(__first, __last - __first, __result, 949 iter_swap<_ForwardIterator, _OutputIterator>); 950} 951 952//------------------------------------------------------------------------ 953// copy_if 954//------------------------------------------------------------------------ 955template <class _ForwardIterator, class _OutputIterator, class _UnaryPredicate> 956_OutputIterator 957__brick_copy_if(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, _UnaryPredicate __pred, 958 /*vector=*/std::false_type) noexcept 959{ 960 return std::copy_if(__first, __last, __result, __pred); 961} 962 963template <class _ForwardIterator, class _OutputIterator, class _UnaryPredicate> 964_OutputIterator 965__brick_copy_if(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, _UnaryPredicate __pred, 966 /*vector=*/std::true_type) noexcept 967{ 968#if (_PSTL_MONOTONIC_PRESENT) 969 return __unseq_backend::__simd_copy_if(__first, __last - __first, __result, __pred); 970#else 971 return std::copy_if(__first, __last, __result, __pred); 972#endif 973} 974 975// TODO: Try to use transform_reduce for combining __brick_copy_if_phase1 on IsVector. 976template <class _DifferenceType, class _ForwardIterator, class _UnaryPredicate> 977std::pair<_DifferenceType, _DifferenceType> 978__brick_calc_mask_1(_ForwardIterator __first, _ForwardIterator __last, bool* __restrict __mask, _UnaryPredicate __pred, 979 /*vector=*/std::false_type) noexcept 980{ 981 auto __count_true = _DifferenceType(0); 982 auto __size = __last - __first; 983 984 static_assert(__is_random_access_iterator<_ForwardIterator>::value, 985 "Pattern-brick error. Should be a random access iterator."); 986 987 for (; __first != __last; ++__first, ++__mask) 988 { 989 *__mask = __pred(*__first); 990 if (*__mask) 991 { 992 ++__count_true; 993 } 994 } 995 return std::make_pair(__count_true, __size - __count_true); 996} 997 998template <class _DifferenceType, class _RandomAccessIterator, class _UnaryPredicate> 999std::pair<_DifferenceType, _DifferenceType> 1000__brick_calc_mask_1(_RandomAccessIterator __first, _RandomAccessIterator __last, bool* __mask, _UnaryPredicate __pred, 1001 /*vector=*/std::true_type) noexcept 1002{ 1003 auto __result = __unseq_backend::__simd_calc_mask_1(__first, __last - __first, __mask, __pred); 1004 return std::make_pair(__result, (__last - __first) - __result); 1005} 1006 1007template <class _ForwardIterator, class _OutputIterator, class _Assigner> 1008void 1009__brick_copy_by_mask(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, bool* __mask, 1010 _Assigner __assigner, /*vector=*/std::false_type) noexcept 1011{ 1012 for (; __first != __last; ++__first, ++__mask) 1013 { 1014 if (*__mask) 1015 { 1016 __assigner(__first, __result); 1017 ++__result; 1018 } 1019 } 1020} 1021 1022template <class _ForwardIterator, class _OutputIterator, class _Assigner> 1023void 1024__brick_copy_by_mask(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, 1025 bool* __restrict __mask, _Assigner __assigner, /*vector=*/std::true_type) noexcept 1026{ 1027#if (_PSTL_MONOTONIC_PRESENT) 1028 __unseq_backend::__simd_copy_by_mask(__first, __last - __first, __result, __mask, __assigner); 1029#else 1030 __internal::__brick_copy_by_mask(__first, __last, __result, __mask, __assigner, std::false_type()); 1031#endif 1032} 1033 1034template <class _ForwardIterator, class _OutputIterator1, class _OutputIterator2> 1035void 1036__brick_partition_by_mask(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator1 __out_true, 1037 _OutputIterator2 __out_false, bool* __mask, /*vector=*/std::false_type) noexcept 1038{ 1039 for (; __first != __last; ++__first, ++__mask) 1040 { 1041 if (*__mask) 1042 { 1043 *__out_true = *__first; 1044 ++__out_true; 1045 } 1046 else 1047 { 1048 *__out_false = *__first; 1049 ++__out_false; 1050 } 1051 } 1052} 1053 1054template <class _RandomAccessIterator, class _OutputIterator1, class _OutputIterator2> 1055void 1056__brick_partition_by_mask(_RandomAccessIterator __first, _RandomAccessIterator __last, _OutputIterator1 __out_true, 1057 _OutputIterator2 __out_false, bool* __mask, /*vector=*/std::true_type) noexcept 1058{ 1059#if (_PSTL_MONOTONIC_PRESENT) 1060 __unseq_backend::__simd_partition_by_mask(__first, __last - __first, __out_true, __out_false, __mask); 1061#else 1062 __internal::__brick_partition_by_mask(__first, __last, __out_true, __out_false, __mask, std::false_type()); 1063#endif 1064} 1065 1066template <class _ExecutionPolicy, class _ForwardIterator, class _OutputIterator, class _UnaryPredicate, class _IsVector> 1067_OutputIterator 1068__pattern_copy_if(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, 1069 _UnaryPredicate __pred, _IsVector __is_vector, /*parallel=*/std::false_type) noexcept 1070{ 1071 return __internal::__brick_copy_if(__first, __last, __result, __pred, __is_vector); 1072} 1073 1074template <class _ExecutionPolicy, class _RandomAccessIterator, class _OutputIterator, class _UnaryPredicate, 1075 class _IsVector> 1076_OutputIterator 1077__pattern_copy_if(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, 1078 _OutputIterator __result, _UnaryPredicate __pred, _IsVector __is_vector, /*parallel=*/std::true_type) 1079{ 1080 typedef typename std::iterator_traits<_RandomAccessIterator>::difference_type _DifferenceType; 1081 const _DifferenceType __n = __last - __first; 1082 if (_DifferenceType(1) < __n) 1083 { 1084 __par_backend::__buffer<bool> __mask_buf(__n); 1085 return __internal::__except_handler([&__exec, __n, __first, __result, __is_vector, __pred, &__mask_buf]() { 1086 bool* __mask = __mask_buf.get(); 1087 _DifferenceType __m{}; 1088 __par_backend::__parallel_strict_scan( 1089 std::forward<_ExecutionPolicy>(__exec), __n, _DifferenceType(0), 1090 [=](_DifferenceType __i, _DifferenceType __len) { // Reduce 1091 return __internal::__brick_calc_mask_1<_DifferenceType>(__first + __i, __first + (__i + __len), 1092 __mask + __i, __pred, __is_vector) 1093 .first; 1094 }, 1095 std::plus<_DifferenceType>(), // Combine 1096 [=](_DifferenceType __i, _DifferenceType __len, _DifferenceType __initial) { // Scan 1097 __internal::__brick_copy_by_mask( 1098 __first + __i, __first + (__i + __len), __result + __initial, __mask + __i, 1099 [](_RandomAccessIterator __x, _OutputIterator __z) { *__z = *__x; }, __is_vector); 1100 }, 1101 [&__m](_DifferenceType __total) { __m = __total; }); 1102 return __result + __m; 1103 }); 1104 } 1105 // trivial sequence - use serial algorithm 1106 return __internal::__brick_copy_if(__first, __last, __result, __pred, __is_vector); 1107} 1108 1109//------------------------------------------------------------------------ 1110// count 1111//------------------------------------------------------------------------ 1112template <class _ForwardIterator, class _Predicate> 1113typename std::iterator_traits<_ForwardIterator>::difference_type 1114__brick_count(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 1115 /* is_vector = */ std::true_type) noexcept 1116{ 1117 return __unseq_backend::__simd_count(__first, __last - __first, __pred); 1118} 1119 1120template <class _ForwardIterator, class _Predicate> 1121typename std::iterator_traits<_ForwardIterator>::difference_type 1122__brick_count(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 1123 /* is_vector = */ std::false_type) noexcept 1124{ 1125 return std::count_if(__first, __last, __pred); 1126} 1127 1128template <class _ExecutionPolicy, class _ForwardIterator, class _Predicate, class _IsVector> 1129typename std::iterator_traits<_ForwardIterator>::difference_type 1130__pattern_count(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 1131 /* is_parallel */ std::false_type, _IsVector __is_vector) noexcept 1132{ 1133 return __internal::__brick_count(__first, __last, __pred, __is_vector); 1134} 1135 1136template <class _ExecutionPolicy, class _ForwardIterator, class _Predicate, class _IsVector> 1137typename std::iterator_traits<_ForwardIterator>::difference_type 1138__pattern_count(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 1139 /* is_parallel */ std::true_type, _IsVector __is_vector) 1140{ 1141 typedef typename std::iterator_traits<_ForwardIterator>::difference_type _SizeType; 1142 return __internal::__except_handler([&]() { 1143 return __par_backend::__parallel_reduce( 1144 std::forward<_ExecutionPolicy>(__exec), __first, __last, _SizeType(0), 1145 [__pred, __is_vector](_ForwardIterator __begin, _ForwardIterator __end, _SizeType __value) -> _SizeType { 1146 return __value + __internal::__brick_count(__begin, __end, __pred, __is_vector); 1147 }, 1148 std::plus<_SizeType>()); 1149 }); 1150} 1151 1152//------------------------------------------------------------------------ 1153// unique 1154//------------------------------------------------------------------------ 1155 1156template <class _ForwardIterator, class _BinaryPredicate> 1157_ForwardIterator 1158__brick_unique(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred, 1159 /*is_vector=*/std::false_type) noexcept 1160{ 1161 return std::unique(__first, __last, __pred); 1162} 1163 1164template <class _ForwardIterator, class _BinaryPredicate> 1165_ForwardIterator 1166__brick_unique(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred, 1167 /*is_vector=*/std::true_type) noexcept 1168{ 1169 _PSTL_PRAGMA_MESSAGE("Vectorized algorithm unimplemented, redirected to serial"); 1170 return std::unique(__first, __last, __pred); 1171} 1172 1173template <class _ExecutionPolicy, class _ForwardIterator, class _BinaryPredicate, class _IsVector> 1174_ForwardIterator 1175__pattern_unique(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred, 1176 _IsVector __is_vector, /*is_parallel=*/std::false_type) noexcept 1177{ 1178 return __internal::__brick_unique(__first, __last, __pred, __is_vector); 1179} 1180 1181// That function is shared between two algorithms - remove_if (__pattern_remove_if) and unique (pattern unique). But a mask calculation is different. 1182// So, a caller passes _CalcMask brick into remove_elements. 1183template <class _ExecutionPolicy, class _ForwardIterator, class _CalcMask, class _IsVector> 1184_ForwardIterator 1185__remove_elements(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _CalcMask __calc_mask, 1186 _IsVector __is_vector) 1187{ 1188 typedef typename std::iterator_traits<_ForwardIterator>::difference_type _DifferenceType; 1189 typedef typename std::iterator_traits<_ForwardIterator>::value_type _Tp; 1190 _DifferenceType __n = __last - __first; 1191 __par_backend::__buffer<bool> __mask_buf(__n); 1192 // 1. find a first iterator that should be removed 1193 return __internal::__except_handler([&]() { 1194 bool* __mask = __mask_buf.get(); 1195 _DifferenceType __min = __par_backend::__parallel_reduce( 1196 std::forward<_ExecutionPolicy>(__exec), _DifferenceType(0), __n, __n, 1197 [__first, __mask, &__calc_mask, __is_vector](_DifferenceType __i, _DifferenceType __j, 1198 _DifferenceType __local_min) -> _DifferenceType { 1199 // Create mask 1200 __calc_mask(__mask + __i, __mask + __j, __first + __i); 1201 1202 // if minimum was found in a previous range we shouldn't do anymore 1203 if (__local_min < __i) 1204 { 1205 return __local_min; 1206 } 1207 // find first iterator that should be removed 1208 bool* __result = __internal::__brick_find_if(__mask + __i, __mask + __j, 1209 [](bool __val) { return !__val; }, __is_vector); 1210 if (__result - __mask == __j) 1211 { 1212 return __local_min; 1213 } 1214 return std::min(__local_min, _DifferenceType(__result - __mask)); 1215 }, 1216 [](_DifferenceType __local_min1, _DifferenceType __local_min2) -> _DifferenceType { 1217 return std::min(__local_min1, __local_min2); 1218 }); 1219 1220 // No elements to remove - exit 1221 if (__min == __n) 1222 { 1223 return __last; 1224 } 1225 __n -= __min; 1226 __first += __min; 1227 1228 __par_backend::__buffer<_Tp> __buf(__n); 1229 _Tp* __result = __buf.get(); 1230 __mask += __min; 1231 _DifferenceType __m{}; 1232 // 2. Elements that doesn't satisfy pred are moved to result 1233 __par_backend::__parallel_strict_scan( 1234 std::forward<_ExecutionPolicy>(__exec), __n, _DifferenceType(0), 1235 [__mask, __is_vector](_DifferenceType __i, _DifferenceType __len) { 1236 return __internal::__brick_count(__mask + __i, __mask + __i + __len, [](bool __val) { return __val; }, 1237 __is_vector); 1238 }, 1239 std::plus<_DifferenceType>(), 1240 [=](_DifferenceType __i, _DifferenceType __len, _DifferenceType __initial) { 1241 __internal::__brick_copy_by_mask( 1242 __first + __i, __first + __i + __len, __result + __initial, __mask + __i, 1243 [](_ForwardIterator __x, _Tp* __z) { 1244 __internal::__invoke_if_else(std::is_trivial<_Tp>(), [&]() { *__z = std::move(*__x); }, 1245 [&]() { ::new (std::addressof(*__z)) _Tp(std::move(*__x)); }); 1246 }, 1247 __is_vector); 1248 }, 1249 [&__m](_DifferenceType __total) { __m = __total; }); 1250 1251 // 3. Elements from result are moved to [first, last) 1252 __par_backend::__parallel_for( 1253 std::forward<_ExecutionPolicy>(__exec), __result, __result + __m, 1254 [__result, __first, __is_vector](_Tp* __i, _Tp* __j) { 1255 __invoke_if_else( 1256 std::is_trivial<_Tp>(), 1257 [&]() { __brick_move(__i, __j, __first + (__i - __result), __is_vector); }, 1258 [&]() { 1259 __brick_move_destroy()(__i, __j, __first + (__i - __result), __is_vector); 1260 }); 1261 }); 1262 return __first + __m; 1263 }); 1264} 1265 1266template <class _ExecutionPolicy, class _ForwardIterator, class _BinaryPredicate, class _IsVector> 1267_ForwardIterator 1268__pattern_unique(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred, 1269 _IsVector __is_vector, /*is_parallel=*/std::true_type) noexcept 1270{ 1271 typedef typename std::iterator_traits<_ForwardIterator>::reference _ReferenceType; 1272 1273 if (__first == __last) 1274 { 1275 return __last; 1276 } 1277 if (__first + 1 == __last || __first + 2 == __last) 1278 { 1279 // Trivial sequence - use serial algorithm 1280 return __internal::__brick_unique(__first, __last, __pred, __is_vector); 1281 } 1282 return __internal::__remove_elements( 1283 std::forward<_ExecutionPolicy>(__exec), ++__first, __last, 1284 [&__pred, __is_vector](bool* __b, bool* __e, _ForwardIterator __it) { 1285 __internal::__brick_walk3( 1286 __b, __e, __it - 1, __it, 1287 [&__pred](bool& __x, _ReferenceType __y, _ReferenceType __z) { __x = !__pred(__y, __z); }, __is_vector); 1288 }, 1289 __is_vector); 1290} 1291 1292//------------------------------------------------------------------------ 1293// unique_copy 1294//------------------------------------------------------------------------ 1295 1296template <class _ForwardIterator, class OutputIterator, class _BinaryPredicate> 1297OutputIterator 1298__brick_unique_copy(_ForwardIterator __first, _ForwardIterator __last, OutputIterator __result, _BinaryPredicate __pred, 1299 /*vector=*/std::false_type) noexcept 1300{ 1301 return std::unique_copy(__first, __last, __result, __pred); 1302} 1303 1304template <class _RandomAccessIterator, class OutputIterator, class _BinaryPredicate> 1305OutputIterator 1306__brick_unique_copy(_RandomAccessIterator __first, _RandomAccessIterator __last, OutputIterator __result, 1307 _BinaryPredicate __pred, /*vector=*/std::true_type) noexcept 1308{ 1309#if (_PSTL_MONOTONIC_PRESENT) 1310 return __unseq_backend::__simd_unique_copy(__first, __last - __first, __result, __pred); 1311#else 1312 return std::unique_copy(__first, __last, __result, __pred); 1313#endif 1314} 1315 1316template <class _ExecutionPolicy, class _ForwardIterator, class _OutputIterator, class _BinaryPredicate, 1317 class _IsVector> 1318_OutputIterator 1319__pattern_unique_copy(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, 1320 _BinaryPredicate __pred, _IsVector __is_vector, /*parallel=*/std::false_type) noexcept 1321{ 1322 return __internal::__brick_unique_copy(__first, __last, __result, __pred, __is_vector); 1323} 1324 1325template <class _DifferenceType, class _RandomAccessIterator, class _BinaryPredicate> 1326_DifferenceType 1327__brick_calc_mask_2(_RandomAccessIterator __first, _RandomAccessIterator __last, bool* __restrict __mask, 1328 _BinaryPredicate __pred, /*vector=*/std::false_type) noexcept 1329{ 1330 _DifferenceType __count = 0; 1331 for (; __first != __last; ++__first, ++__mask) 1332 { 1333 *__mask = !__pred(*__first, *(__first - 1)); 1334 __count += *__mask; 1335 } 1336 return __count; 1337} 1338 1339template <class _DifferenceType, class _RandomAccessIterator, class _BinaryPredicate> 1340_DifferenceType 1341__brick_calc_mask_2(_RandomAccessIterator __first, _RandomAccessIterator __last, bool* __restrict __mask, 1342 _BinaryPredicate __pred, /*vector=*/std::true_type) noexcept 1343{ 1344 return __unseq_backend::__simd_calc_mask_2(__first, __last - __first, __mask, __pred); 1345} 1346 1347template <class _ExecutionPolicy, class _RandomAccessIterator, class _OutputIterator, class _BinaryPredicate, 1348 class _IsVector> 1349_OutputIterator 1350__pattern_unique_copy(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, 1351 _OutputIterator __result, _BinaryPredicate __pred, _IsVector __is_vector, 1352 /*parallel=*/std::true_type) 1353{ 1354 typedef typename std::iterator_traits<_RandomAccessIterator>::difference_type _DifferenceType; 1355 const _DifferenceType __n = __last - __first; 1356 if (_DifferenceType(2) < __n) 1357 { 1358 __par_backend::__buffer<bool> __mask_buf(__n); 1359 if (_DifferenceType(2) < __n) 1360 { 1361 return __internal::__except_handler([&__exec, __n, __first, __result, __pred, __is_vector, &__mask_buf]() { 1362 bool* __mask = __mask_buf.get(); 1363 _DifferenceType __m{}; 1364 __par_backend::__parallel_strict_scan( 1365 std::forward<_ExecutionPolicy>(__exec), __n, _DifferenceType(0), 1366 [=](_DifferenceType __i, _DifferenceType __len) -> _DifferenceType { // Reduce 1367 _DifferenceType __extra = 0; 1368 if (__i == 0) 1369 { 1370 // Special boundary case 1371 __mask[__i] = true; 1372 if (--__len == 0) 1373 return 1; 1374 ++__i; 1375 ++__extra; 1376 } 1377 return __internal::__brick_calc_mask_2<_DifferenceType>(__first + __i, __first + (__i + __len), 1378 __mask + __i, __pred, __is_vector) + 1379 __extra; 1380 }, 1381 std::plus<_DifferenceType>(), // Combine 1382 [=](_DifferenceType __i, _DifferenceType __len, _DifferenceType __initial) { // Scan 1383 // Phase 2 is same as for __pattern_copy_if 1384 __internal::__brick_copy_by_mask( 1385 __first + __i, __first + (__i + __len), __result + __initial, __mask + __i, 1386 [](_RandomAccessIterator __x, _OutputIterator __z) { *__z = *__x; }, __is_vector); 1387 }, 1388 [&__m](_DifferenceType __total) { __m = __total; }); 1389 return __result + __m; 1390 }); 1391 } 1392 } 1393 // trivial sequence - use serial algorithm 1394 return __internal::__brick_unique_copy(__first, __last, __result, __pred, __is_vector); 1395} 1396 1397//------------------------------------------------------------------------ 1398// reverse 1399//------------------------------------------------------------------------ 1400template <class _BidirectionalIterator> 1401void 1402__brick_reverse(_BidirectionalIterator __first, _BidirectionalIterator __last, /*__is_vector=*/std::false_type) noexcept 1403{ 1404 std::reverse(__first, __last); 1405} 1406 1407template <class _BidirectionalIterator> 1408void 1409__brick_reverse(_BidirectionalIterator __first, _BidirectionalIterator __last, /*__is_vector=*/std::true_type) noexcept 1410{ 1411 typedef typename std::iterator_traits<_BidirectionalIterator>::reference _ReferenceType; 1412 1413 const auto __n = (__last - __first) / 2; 1414 __unseq_backend::__simd_walk_2(__first, __n, std::reverse_iterator<_BidirectionalIterator>(__last), 1415 [](_ReferenceType __x, _ReferenceType __y) { 1416 using std::swap; 1417 swap(__x, __y); 1418 }); 1419} 1420 1421// this brick is called in parallel version, so we can use iterator arithmetic 1422template <class _BidirectionalIterator> 1423void 1424__brick_reverse(_BidirectionalIterator __first, _BidirectionalIterator __last, _BidirectionalIterator __d_last, 1425 /*is_vector=*/std::false_type) noexcept 1426{ 1427 for (--__d_last; __first != __last; ++__first, --__d_last) 1428 { 1429 using std::iter_swap; 1430 iter_swap(__first, __d_last); 1431 } 1432} 1433 1434// this brick is called in parallel version, so we can use iterator arithmetic 1435template <class _BidirectionalIterator> 1436void 1437__brick_reverse(_BidirectionalIterator __first, _BidirectionalIterator __last, _BidirectionalIterator __d_last, 1438 /*is_vector=*/std::true_type) noexcept 1439{ 1440 typedef typename std::iterator_traits<_BidirectionalIterator>::reference _ReferenceType; 1441 1442 __unseq_backend::__simd_walk_2(__first, __last - __first, std::reverse_iterator<_BidirectionalIterator>(__d_last), 1443 [](_ReferenceType __x, _ReferenceType __y) { 1444 using std::swap; 1445 swap(__x, __y); 1446 }); 1447} 1448 1449template <class _ExecutionPolicy, class _BidirectionalIterator, class _IsVector> 1450void 1451__pattern_reverse(_ExecutionPolicy&&, _BidirectionalIterator __first, _BidirectionalIterator __last, 1452 _IsVector _is_vector, 1453 /*is_parallel=*/std::false_type) noexcept 1454{ 1455 __internal::__brick_reverse(__first, __last, _is_vector); 1456} 1457 1458template <class _ExecutionPolicy, class _BidirectionalIterator, class _IsVector> 1459void 1460__pattern_reverse(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __last, 1461 _IsVector __is_vector, /*is_parallel=*/std::true_type) 1462{ 1463 __par_backend::__parallel_for( 1464 std::forward<_ExecutionPolicy>(__exec), __first, __first + (__last - __first) / 2, 1465 [__is_vector, __first, __last](_BidirectionalIterator __inner_first, _BidirectionalIterator __inner_last) { 1466 __internal::__brick_reverse(__inner_first, __inner_last, __last - (__inner_first - __first), __is_vector); 1467 }); 1468} 1469 1470//------------------------------------------------------------------------ 1471// reverse_copy 1472//------------------------------------------------------------------------ 1473 1474template <class _BidirectionalIterator, class _OutputIterator> 1475_OutputIterator 1476__brick_reverse_copy(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __d_first, 1477 /*is_vector=*/std::false_type) noexcept 1478{ 1479 return std::reverse_copy(__first, __last, __d_first); 1480} 1481 1482template <class _BidirectionalIterator, class _OutputIterator> 1483_OutputIterator 1484__brick_reverse_copy(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __d_first, 1485 /*is_vector=*/std::true_type) noexcept 1486{ 1487 typedef typename std::iterator_traits<_BidirectionalIterator>::reference _ReferenceType1; 1488 typedef typename std::iterator_traits<_OutputIterator>::reference _ReferenceType2; 1489 1490 return __unseq_backend::__simd_walk_2(std::reverse_iterator<_BidirectionalIterator>(__last), __last - __first, 1491 __d_first, [](_ReferenceType1 __x, _ReferenceType2 __y) { __y = __x; }); 1492} 1493 1494template <class _ExecutionPolicy, class _BidirectionalIterator, class _OutputIterator, class _IsVector> 1495_OutputIterator 1496__pattern_reverse_copy(_ExecutionPolicy&&, _BidirectionalIterator __first, _BidirectionalIterator __last, 1497 _OutputIterator __d_first, _IsVector __is_vector, /*is_parallel=*/std::false_type) noexcept 1498{ 1499 return __internal::__brick_reverse_copy(__first, __last, __d_first, __is_vector); 1500} 1501 1502template <class _ExecutionPolicy, class _BidirectionalIterator, class _OutputIterator, class _IsVector> 1503_OutputIterator 1504__pattern_reverse_copy(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __last, 1505 _OutputIterator __d_first, _IsVector __is_vector, /*is_parallel=*/std::true_type) 1506{ 1507 auto __len = __last - __first; 1508 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __first, __last, 1509 [__is_vector, __first, __len, __d_first](_BidirectionalIterator __inner_first, 1510 _BidirectionalIterator __inner_last) { 1511 __internal::__brick_reverse_copy(__inner_first, __inner_last, 1512 __d_first + (__len - (__inner_last - __first)), 1513 __is_vector); 1514 }); 1515 return __d_first + __len; 1516} 1517 1518//------------------------------------------------------------------------ 1519// rotate 1520//------------------------------------------------------------------------ 1521template <class _ForwardIterator> 1522_ForwardIterator 1523__brick_rotate(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, 1524 /*is_vector=*/std::false_type) noexcept 1525{ 1526#if _PSTL_CPP11_STD_ROTATE_BROKEN 1527 std::rotate(__first, __middle, __last); 1528 return std::next(__first, std::distance(__middle, __last)); 1529#else 1530 return std::rotate(__first, __middle, __last); 1531#endif 1532} 1533 1534template <class _ForwardIterator> 1535_ForwardIterator 1536__brick_rotate(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, 1537 /*is_vector=*/std::true_type) noexcept 1538{ 1539 auto __n = __last - __first; 1540 auto __m = __middle - __first; 1541 const _ForwardIterator __ret = __first + (__last - __middle); 1542 1543 bool __is_left = (__m <= __n / 2); 1544 if (!__is_left) 1545 __m = __n - __m; 1546 1547 while (__n > 1 && __m > 0) 1548 { 1549 using std::iter_swap; 1550 const auto __m_2 = __m * 2; 1551 if (__is_left) 1552 { 1553 for (; __last - __first >= __m_2; __first += __m) 1554 { 1555 __unseq_backend::__simd_assign(__first, __m, __first + __m, 1556 iter_swap<_ForwardIterator, _ForwardIterator>); 1557 } 1558 } 1559 else 1560 { 1561 for (; __last - __first >= __m_2; __last -= __m) 1562 { 1563 __unseq_backend::__simd_assign(__last - __m, __m, __last - __m_2, 1564 iter_swap<_ForwardIterator, _ForwardIterator>); 1565 } 1566 } 1567 __is_left = !__is_left; 1568 __m = __n % __m; 1569 __n = __last - __first; 1570 } 1571 1572 return __ret; 1573} 1574 1575template <class _ExecutionPolicy, class _ForwardIterator, class _IsVector> 1576_ForwardIterator 1577__pattern_rotate(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, 1578 _IsVector __is_vector, /*is_parallel=*/std::false_type) noexcept 1579{ 1580 return __internal::__brick_rotate(__first, __middle, __last, __is_vector); 1581} 1582 1583template <class _ExecutionPolicy, class _ForwardIterator, class _IsVector> 1584_ForwardIterator 1585__pattern_rotate(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __middle, 1586 _ForwardIterator __last, _IsVector __is_vector, /*is_parallel=*/std::true_type) 1587{ 1588 typedef typename std::iterator_traits<_ForwardIterator>::value_type _Tp; 1589 auto __n = __last - __first; 1590 auto __m = __middle - __first; 1591 if (__m <= __n / 2) 1592 { 1593 __par_backend::__buffer<_Tp> __buf(__n - __m); 1594 return __internal::__except_handler([&__exec, __n, __m, __first, __middle, __last, __is_vector, &__buf]() { 1595 _Tp* __result = __buf.get(); 1596 __par_backend::__parallel_for( 1597 std::forward<_ExecutionPolicy>(__exec), __middle, __last, 1598 [__middle, __result, __is_vector](_ForwardIterator __b, _ForwardIterator __e) { 1599 __internal::__brick_uninitialized_move(__b, __e, __result + (__b - __middle), __is_vector); 1600 }); 1601 1602 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __first, __middle, 1603 [__last, __middle, __is_vector](_ForwardIterator __b, _ForwardIterator __e) { 1604 __internal::__brick_move(__b, __e, __b + (__last - __middle), 1605 __is_vector); 1606 }); 1607 1608 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __result, __result + (__n - __m), 1609 [__first, __result, __is_vector](_Tp* __b, _Tp* __e) { 1610 __brick_move_destroy()( 1611 __b, __e, __first + (__b - __result), __is_vector); 1612 }); 1613 1614 return __first + (__last - __middle); 1615 }); 1616 } 1617 else 1618 { 1619 __par_backend::__buffer<_Tp> __buf(__m); 1620 return __internal::__except_handler([&__exec, __n, __m, __first, __middle, __last, __is_vector, &__buf]() { 1621 _Tp* __result = __buf.get(); 1622 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __first, __middle, 1623 [__first, __result, __is_vector](_ForwardIterator __b, _ForwardIterator __e) { 1624 __internal::__brick_uninitialized_move( 1625 __b, __e, __result + (__b - __first), __is_vector); 1626 }); 1627 1628 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __middle, __last, 1629 [__first, __middle, __is_vector](_ForwardIterator __b, _ForwardIterator __e) { 1630 __internal::__brick_move(__b, __e, __first + (__b - __middle), 1631 __is_vector); 1632 }); 1633 1634 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __result, __result + __m, 1635 [__n, __m, __first, __result, __is_vector](_Tp* __b, _Tp* __e) { 1636 __brick_move_destroy()( 1637 __b, __e, __first + ((__n - __m) + (__b - __result)), __is_vector); 1638 }); 1639 1640 return __first + (__last - __middle); 1641 }); 1642 } 1643} 1644 1645//------------------------------------------------------------------------ 1646// rotate_copy 1647//------------------------------------------------------------------------ 1648 1649template <class _ForwardIterator, class _OutputIterator> 1650_OutputIterator 1651__brick_rotate_copy(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, 1652 _OutputIterator __result, /*__is_vector=*/std::false_type) noexcept 1653{ 1654 return std::rotate_copy(__first, __middle, __last, __result); 1655} 1656 1657template <class _ForwardIterator, class _OutputIterator> 1658_OutputIterator 1659__brick_rotate_copy(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, 1660 _OutputIterator __result, /*__is_vector=*/std::true_type) noexcept 1661{ 1662 _OutputIterator __res = __internal::__brick_copy(__middle, __last, __result, std::true_type()); 1663 return __internal::__brick_copy(__first, __middle, __res, std::true_type()); 1664} 1665 1666template <class _ExecutionPolicy, class _ForwardIterator, class _OutputIterator, class _IsVector> 1667_OutputIterator 1668__pattern_rotate_copy(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, 1669 _OutputIterator __result, _IsVector __is_vector, /*is_parallel=*/std::false_type) noexcept 1670{ 1671 return __internal::__brick_rotate_copy(__first, __middle, __last, __result, __is_vector); 1672} 1673 1674template <class _ExecutionPolicy, class _ForwardIterator, class _OutputIterator, class _IsVector> 1675_OutputIterator 1676__pattern_rotate_copy(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __middle, 1677 _ForwardIterator __last, _OutputIterator __result, _IsVector __is_vector, 1678 /*is_parallel=*/std::true_type) 1679{ 1680 __par_backend::__parallel_for( 1681 std::forward<_ExecutionPolicy>(__exec), __first, __last, 1682 [__first, __last, __middle, __result, __is_vector](_ForwardIterator __b, _ForwardIterator __e) { 1683 if (__b > __middle) 1684 { 1685 __internal::__brick_copy(__b, __e, __result + (__b - __middle), __is_vector); 1686 } 1687 else 1688 { 1689 _OutputIterator __new_result = __result + ((__last - __middle) + (__b - __first)); 1690 if (__e < __middle) 1691 { 1692 __internal::__brick_copy(__b, __e, __new_result, __is_vector); 1693 } 1694 else 1695 { 1696 __internal::__brick_copy(__b, __middle, __new_result, __is_vector); 1697 __internal::__brick_copy(__middle, __e, __result, __is_vector); 1698 } 1699 } 1700 }); 1701 return __result + (__last - __first); 1702} 1703 1704//------------------------------------------------------------------------ 1705// is_partitioned 1706//------------------------------------------------------------------------ 1707 1708template <class _ForwardIterator, class _UnaryPredicate> 1709bool 1710__brick_is_partitioned(_ForwardIterator __first, _ForwardIterator __last, _UnaryPredicate __pred, 1711 /*is_vector=*/std::false_type) noexcept 1712{ 1713 return std::is_partitioned(__first, __last, __pred); 1714} 1715 1716template <class _ForwardIterator, class _UnaryPredicate> 1717bool 1718__brick_is_partitioned(_ForwardIterator __first, _ForwardIterator __last, _UnaryPredicate __pred, 1719 /*is_vector=*/std::true_type) noexcept 1720{ 1721 typedef typename std::iterator_traits<_ForwardIterator>::difference_type _SizeType; 1722 if (__first == __last) 1723 { 1724 return true; 1725 } 1726 else 1727 { 1728 _ForwardIterator __result = __unseq_backend::__simd_first( 1729 __first, _SizeType(0), __last - __first, 1730 [&__pred](_ForwardIterator __it, _SizeType __i) { return !__pred(__it[__i]); }); 1731 if (__result == __last) 1732 { 1733 return true; 1734 } 1735 else 1736 { 1737 ++__result; 1738 return !__unseq_backend::__simd_or(__result, __last - __result, __pred); 1739 } 1740 } 1741} 1742 1743template <class _ExecutionPolicy, class _ForwardIterator, class _UnaryPredicate, class _IsVector> 1744bool 1745__pattern_is_partitioned(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _UnaryPredicate __pred, 1746 _IsVector __is_vector, /*is_parallel=*/std::false_type) noexcept 1747{ 1748 return __internal::__brick_is_partitioned(__first, __last, __pred, __is_vector); 1749} 1750 1751template <class _ExecutionPolicy, class _ForwardIterator, class _UnaryPredicate, class _IsVector> 1752bool 1753__pattern_is_partitioned(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, 1754 _UnaryPredicate __pred, _IsVector __is_vector, /*is_parallel=*/std::true_type) 1755{ 1756 if (__first == __last) 1757 { 1758 return true; 1759 } 1760 else 1761 { 1762 return __internal::__except_handler([&]() { 1763 // State of current range: 1764 // broken - current range is not partitioned by pred 1765 // all_true - all elements in current range satisfy pred 1766 // all_false - all elements in current range don't satisfy pred 1767 // true_false - elements satisfy pred are placed before elements that don't satisfy pred 1768 enum _ReduceType 1769 { 1770 __not_init = -1, 1771 __broken, 1772 __all_true, 1773 __all_false, 1774 __true_false 1775 }; 1776 _ReduceType __init = __not_init; 1777 1778 // Array with states that we'll have when state from the left branch is merged with state from the right branch. 1779 // State is calculated by formula: new_state = table[left_state * 4 + right_state] 1780 _ReduceType __table[] = {__broken, __broken, __broken, __broken, __broken, __all_true, 1781 __true_false, __true_false, __broken, __broken, __all_false, __broken, 1782 __broken, __broken, __true_false, __broken}; 1783 1784 __init = __par_backend::__parallel_reduce( 1785 std::forward<_ExecutionPolicy>(__exec), __first, __last, __init, 1786 [&__pred, &__table, __is_vector](_ForwardIterator __i, _ForwardIterator __j, 1787 _ReduceType __value) -> _ReduceType { 1788 if (__value == __broken) 1789 { 1790 return __broken; 1791 } 1792 _ReduceType __res = __not_init; 1793 // if first element satisfy pred 1794 if (__pred(*__i)) 1795 { 1796 // find first element that don't satisfy pred 1797 _ForwardIterator __x = 1798 __internal::__brick_find_if(__i + 1, __j, std::not_fn(__pred), __is_vector); 1799 if (__x != __j) 1800 { 1801 // find first element after "x" that satisfy pred 1802 _ForwardIterator __y = __internal::__brick_find_if(__x + 1, __j, __pred, __is_vector); 1803 // if it was found then range isn't partitioned by pred 1804 if (__y != __j) 1805 { 1806 return __broken; 1807 } 1808 else 1809 { 1810 __res = __true_false; 1811 } 1812 } 1813 else 1814 { 1815 __res = __all_true; 1816 } 1817 } 1818 else 1819 { // if first element doesn't satisfy pred 1820 // then we should find the first element that satisfy pred. 1821 // If we found it then range isn't partitioned by pred 1822 if (__internal::__brick_find_if(__i + 1, __j, __pred, __is_vector) != __j) 1823 { 1824 return __broken; 1825 } 1826 else 1827 { 1828 __res = __all_false; 1829 } 1830 } 1831 // if we have value from left range then we should calculate the result 1832 return (__value == -1) ? __res : __table[__value * 4 + __res]; 1833 }, 1834 1835 [&__table](_ReduceType __val1, _ReduceType __val2) -> _ReduceType { 1836 if (__val1 == __broken || __val2 == __broken) 1837 { 1838 return __broken; 1839 } 1840 // calculate the result for new big range 1841 return __table[__val1 * 4 + __val2]; 1842 }); 1843 return __init != __broken; 1844 }); 1845 } 1846} 1847 1848//------------------------------------------------------------------------ 1849// partition 1850//------------------------------------------------------------------------ 1851 1852template <class _ForwardIterator, class _UnaryPredicate> 1853_ForwardIterator 1854__brick_partition(_ForwardIterator __first, _ForwardIterator __last, _UnaryPredicate __pred, 1855 /*is_vector=*/std::false_type) noexcept 1856{ 1857 return std::partition(__first, __last, __pred); 1858} 1859 1860template <class _ForwardIterator, class _UnaryPredicate> 1861_ForwardIterator 1862__brick_partition(_ForwardIterator __first, _ForwardIterator __last, _UnaryPredicate __pred, 1863 /*is_vector=*/std::true_type) noexcept 1864{ 1865 _PSTL_PRAGMA_MESSAGE("Vectorized algorithm unimplemented, redirected to serial"); 1866 return std::partition(__first, __last, __pred); 1867} 1868 1869template <class _ExecutionPolicy, class _ForwardIterator, class _UnaryPredicate, class _IsVector> 1870_ForwardIterator 1871__pattern_partition(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _UnaryPredicate __pred, 1872 _IsVector __is_vector, /*is_parallel=*/std::false_type) noexcept 1873{ 1874 return __internal::__brick_partition(__first, __last, __pred, __is_vector); 1875} 1876 1877template <class _ExecutionPolicy, class _ForwardIterator, class _UnaryPredicate, class _IsVector> 1878_ForwardIterator 1879__pattern_partition(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, 1880 _UnaryPredicate __pred, _IsVector __is_vector, /*is_parallel=*/std::true_type) 1881{ 1882 1883 // partitioned range: elements before pivot satisfy pred (true part), 1884 // elements after pivot don't satisfy pred (false part) 1885 struct _PartitionRange 1886 { 1887 _ForwardIterator __begin; 1888 _ForwardIterator __pivot; 1889 _ForwardIterator __end; 1890 }; 1891 1892 return __internal::__except_handler([&]() { 1893 _PartitionRange __init{__last, __last, __last}; 1894 1895 // lambda for merging two partitioned ranges to one partitioned range 1896 auto __reductor = [&__exec, __is_vector](_PartitionRange __val1, _PartitionRange __val2) -> _PartitionRange { 1897 auto __size1 = __val1.__end - __val1.__pivot; 1898 auto __size2 = __val2.__pivot - __val2.__begin; 1899 auto __new_begin = __val2.__begin - (__val1.__end - __val1.__begin); 1900 1901 // if all elements in left range satisfy pred then we can move new pivot to pivot of right range 1902 if (__val1.__end == __val1.__pivot) 1903 { 1904 return {__new_begin, __val2.__pivot, __val2.__end}; 1905 } 1906 // if true part of right range greater than false part of left range 1907 // then we should swap the false part of left range and last part of true part of right range 1908 else if (__size2 > __size1) 1909 { 1910 __par_backend::__parallel_for( 1911 std::forward<_ExecutionPolicy>(__exec), __val1.__pivot, __val1.__pivot + __size1, 1912 [__val1, __val2, __size1, __is_vector](_ForwardIterator __i, _ForwardIterator __j) { 1913 __internal::__brick_swap_ranges(__i, __j, (__val2.__pivot - __size1) + (__i - __val1.__pivot), 1914 __is_vector); 1915 }); 1916 return {__new_begin, __val2.__pivot - __size1, __val2.__end}; 1917 } 1918 // else we should swap the first part of false part of left range and true part of right range 1919 else 1920 { 1921 __par_backend::__parallel_for( 1922 std::forward<_ExecutionPolicy>(__exec), __val1.__pivot, __val1.__pivot + __size2, 1923 [__val1, __val2, __is_vector](_ForwardIterator __i, _ForwardIterator __j) { 1924 __internal::__brick_swap_ranges(__i, __j, __val2.__begin + (__i - __val1.__pivot), __is_vector); 1925 }); 1926 return {__new_begin, __val1.__pivot + __size2, __val2.__end}; 1927 } 1928 }; 1929 1930 _PartitionRange __result = __par_backend::__parallel_reduce( 1931 std::forward<_ExecutionPolicy>(__exec), __first, __last, __init, 1932 [__pred, __is_vector, __reductor](_ForwardIterator __i, _ForwardIterator __j, 1933 _PartitionRange __value) -> _PartitionRange { 1934 //1. serial partition 1935 _ForwardIterator __pivot = __internal::__brick_partition(__i, __j, __pred, __is_vector); 1936 1937 // 2. merging of two ranges (left and right respectively) 1938 return __reductor(__value, {__i, __pivot, __j}); 1939 }, 1940 __reductor); 1941 return __result.__pivot; 1942 }); 1943} 1944 1945//------------------------------------------------------------------------ 1946// stable_partition 1947//------------------------------------------------------------------------ 1948 1949template <class _BidirectionalIterator, class _UnaryPredicate> 1950_BidirectionalIterator 1951__brick_stable_partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _UnaryPredicate __pred, 1952 /*__is_vector=*/std::false_type) noexcept 1953{ 1954 return std::stable_partition(__first, __last, __pred); 1955} 1956 1957template <class _BidirectionalIterator, class _UnaryPredicate> 1958_BidirectionalIterator 1959__brick_stable_partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _UnaryPredicate __pred, 1960 /*__is_vector=*/std::true_type) noexcept 1961{ 1962 _PSTL_PRAGMA_MESSAGE("Vectorized algorithm unimplemented, redirected to serial"); 1963 return std::stable_partition(__first, __last, __pred); 1964} 1965 1966template <class _ExecutionPolicy, class _BidirectionalIterator, class _UnaryPredicate, class _IsVector> 1967_BidirectionalIterator 1968__pattern_stable_partition(_ExecutionPolicy&&, _BidirectionalIterator __first, _BidirectionalIterator __last, 1969 _UnaryPredicate __pred, _IsVector __is_vector, 1970 /*is_parallelization=*/std::false_type) noexcept 1971{ 1972 return __internal::__brick_stable_partition(__first, __last, __pred, __is_vector); 1973} 1974 1975template <class _ExecutionPolicy, class _BidirectionalIterator, class _UnaryPredicate, class _IsVector> 1976_BidirectionalIterator 1977__pattern_stable_partition(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __last, 1978 _UnaryPredicate __pred, _IsVector __is_vector, 1979 /*is_parallelization=*/std::true_type) noexcept 1980{ 1981 // partitioned range: elements before pivot satisfy pred (true part), 1982 // elements after pivot don't satisfy pred (false part) 1983 struct _PartitionRange 1984 { 1985 _BidirectionalIterator __begin; 1986 _BidirectionalIterator __pivot; 1987 _BidirectionalIterator __end; 1988 }; 1989 1990 return __internal::__except_handler([&]() { 1991 _PartitionRange __init{__last, __last, __last}; 1992 1993 // lambda for merging two partitioned ranges to one partitioned range 1994 auto __reductor = [__is_vector](_PartitionRange __val1, _PartitionRange __val2) -> _PartitionRange { 1995 auto __size1 = __val1.__end - __val1.__pivot; 1996 auto __new_begin = __val2.__begin - (__val1.__end - __val1.__begin); 1997 1998 // if all elements in left range satisfy pred then we can move new pivot to pivot of right range 1999 if (__val1.__end == __val1.__pivot) 2000 { 2001 return {__new_begin, __val2.__pivot, __val2.__end}; 2002 } 2003 // if true part of right range greater than false part of left range 2004 // then we should swap the false part of left range and last part of true part of right range 2005 else 2006 { 2007 __internal::__brick_rotate(__val1.__pivot, __val2.__begin, __val2.__pivot, __is_vector); 2008 return {__new_begin, __val2.__pivot - __size1, __val2.__end}; 2009 } 2010 }; 2011 2012 _PartitionRange __result = __par_backend::__parallel_reduce( 2013 std::forward<_ExecutionPolicy>(__exec), __first, __last, __init, 2014 [&__pred, __is_vector, __reductor](_BidirectionalIterator __i, _BidirectionalIterator __j, 2015 _PartitionRange __value) -> _PartitionRange { 2016 //1. serial stable_partition 2017 _BidirectionalIterator __pivot = __internal::__brick_stable_partition(__i, __j, __pred, __is_vector); 2018 2019 // 2. merging of two ranges (left and right respectively) 2020 return __reductor(__value, {__i, __pivot, __j}); 2021 }, 2022 __reductor); 2023 return __result.__pivot; 2024 }); 2025} 2026 2027//------------------------------------------------------------------------ 2028// partition_copy 2029//------------------------------------------------------------------------ 2030 2031template <class _ForwardIterator, class _OutputIterator1, class _OutputIterator2, class _UnaryPredicate> 2032std::pair<_OutputIterator1, _OutputIterator2> 2033__brick_partition_copy(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator1 __out_true, 2034 _OutputIterator2 __out_false, _UnaryPredicate __pred, /*is_vector=*/std::false_type) noexcept 2035{ 2036 return std::partition_copy(__first, __last, __out_true, __out_false, __pred); 2037} 2038 2039template <class _ForwardIterator, class _OutputIterator1, class _OutputIterator2, class _UnaryPredicate> 2040std::pair<_OutputIterator1, _OutputIterator2> 2041__brick_partition_copy(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator1 __out_true, 2042 _OutputIterator2 __out_false, _UnaryPredicate __pred, /*is_vector=*/std::true_type) noexcept 2043{ 2044#if (_PSTL_MONOTONIC_PRESENT) 2045 return __unseq_backend::__simd_partition_copy(__first, __last - __first, __out_true, __out_false, __pred); 2046#else 2047 return std::partition_copy(__first, __last, __out_true, __out_false, __pred); 2048#endif 2049} 2050 2051template <class _ExecutionPolicy, class _ForwardIterator, class _OutputIterator1, class _OutputIterator2, 2052 class _UnaryPredicate, class _IsVector> 2053std::pair<_OutputIterator1, _OutputIterator2> 2054__pattern_partition_copy(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, 2055 _OutputIterator1 __out_true, _OutputIterator2 __out_false, _UnaryPredicate __pred, 2056 _IsVector __is_vector, /*is_parallelization=*/std::false_type) noexcept 2057{ 2058 return __internal::__brick_partition_copy(__first, __last, __out_true, __out_false, __pred, __is_vector); 2059} 2060 2061template <class _ExecutionPolicy, class _RandomAccessIterator, class _OutputIterator1, class _OutputIterator2, 2062 class _UnaryPredicate, class _IsVector> 2063std::pair<_OutputIterator1, _OutputIterator2> 2064__pattern_partition_copy(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, 2065 _OutputIterator1 __out_true, _OutputIterator2 __out_false, _UnaryPredicate __pred, 2066 _IsVector __is_vector, /*is_parallelization=*/std::true_type) 2067{ 2068 typedef typename std::iterator_traits<_RandomAccessIterator>::difference_type _DifferenceType; 2069 typedef std::pair<_DifferenceType, _DifferenceType> _ReturnType; 2070 const _DifferenceType __n = __last - __first; 2071 if (_DifferenceType(1) < __n) 2072 { 2073 __par_backend::__buffer<bool> __mask_buf(__n); 2074 return __internal::__except_handler([&__exec, __n, __first, __out_true, __out_false, __is_vector, __pred, 2075 &__mask_buf]() { 2076 bool* __mask = __mask_buf.get(); 2077 _ReturnType __m{}; 2078 __par_backend::__parallel_strict_scan( 2079 std::forward<_ExecutionPolicy>(__exec), __n, std::make_pair(_DifferenceType(0), _DifferenceType(0)), 2080 [=](_DifferenceType __i, _DifferenceType __len) { // Reduce 2081 return __internal::__brick_calc_mask_1<_DifferenceType>(__first + __i, __first + (__i + __len), 2082 __mask + __i, __pred, __is_vector); 2083 }, 2084 [](const _ReturnType& __x, const _ReturnType& __y) -> _ReturnType { 2085 return std::make_pair(__x.first + __y.first, __x.second + __y.second); 2086 }, // Combine 2087 [=](_DifferenceType __i, _DifferenceType __len, _ReturnType __initial) { // Scan 2088 __internal::__brick_partition_by_mask(__first + __i, __first + (__i + __len), 2089 __out_true + __initial.first, __out_false + __initial.second, 2090 __mask + __i, __is_vector); 2091 }, 2092 [&__m](_ReturnType __total) { __m = __total; }); 2093 return std::make_pair(__out_true + __m.first, __out_false + __m.second); 2094 }); 2095 } 2096 // trivial sequence - use serial algorithm 2097 return __internal::__brick_partition_copy(__first, __last, __out_true, __out_false, __pred, __is_vector); 2098} 2099 2100//------------------------------------------------------------------------ 2101// sort 2102//------------------------------------------------------------------------ 2103 2104template <class _ExecutionPolicy, class _RandomAccessIterator, class _Compare, class _IsVector, 2105 class _IsMoveConstructible> 2106void 2107__pattern_sort(_ExecutionPolicy&&, _RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 2108 _IsVector /*is_vector*/, /*is_parallel=*/std::false_type, _IsMoveConstructible) noexcept 2109{ 2110 std::sort(__first, __last, __comp); 2111} 2112 2113template <class _ExecutionPolicy, class _RandomAccessIterator, class _Compare, class _IsVector> 2114void 2115__pattern_sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 2116 _IsVector /*is_vector*/, /*is_parallel=*/std::true_type, /*is_move_constructible=*/std::true_type) 2117{ 2118 __internal::__except_handler([&]() { 2119 __par_backend::__parallel_stable_sort(std::forward<_ExecutionPolicy>(__exec), __first, __last, __comp, 2120 [](_RandomAccessIterator __first, _RandomAccessIterator __last, 2121 _Compare __comp) { std::sort(__first, __last, __comp); }); 2122 }); 2123} 2124 2125//------------------------------------------------------------------------ 2126// stable_sort 2127//------------------------------------------------------------------------ 2128 2129template <class _ExecutionPolicy, class _RandomAccessIterator, class _Compare, class _IsVector> 2130void 2131__pattern_stable_sort(_ExecutionPolicy&&, _RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 2132 _IsVector /*is_vector*/, /*is_parallel=*/std::false_type) noexcept 2133{ 2134 std::stable_sort(__first, __last, __comp); 2135} 2136 2137template <class _ExecutionPolicy, class _RandomAccessIterator, class _Compare, class _IsVector> 2138void 2139__pattern_stable_sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, 2140 _Compare __comp, _IsVector /*is_vector*/, /*is_parallel=*/std::true_type) 2141{ 2142 __internal::__except_handler([&]() { 2143 __par_backend::__parallel_stable_sort(std::forward<_ExecutionPolicy>(__exec), __first, __last, __comp, 2144 [](_RandomAccessIterator __first, _RandomAccessIterator __last, 2145 _Compare __comp) { std::stable_sort(__first, __last, __comp); }); 2146 }); 2147} 2148 2149//------------------------------------------------------------------------ 2150// partial_sort 2151//------------------------------------------------------------------------ 2152 2153template <class _ExecutionPolicy, class _RandomAccessIterator, class _Compare, class _IsVector> 2154void 2155__pattern_partial_sort(_ExecutionPolicy&&, _RandomAccessIterator __first, _RandomAccessIterator __middle, 2156 _RandomAccessIterator __last, _Compare __comp, _IsVector, 2157 /*is_parallel=*/std::false_type) noexcept 2158{ 2159 std::partial_sort(__first, __middle, __last, __comp); 2160} 2161 2162template <class _ExecutionPolicy, class _RandomAccessIterator, class _Compare, class _IsVector> 2163void 2164__pattern_partial_sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __middle, 2165 _RandomAccessIterator __last, _Compare __comp, _IsVector, /*is_parallel=*/std::true_type) 2166{ 2167 const auto __n = __middle - __first; 2168 if (__n == 0) 2169 return; 2170 2171 __internal::__except_handler([&]() { 2172 __par_backend::__parallel_stable_sort( 2173 std::forward<_ExecutionPolicy>(__exec), __first, __last, __comp, 2174 [__n](_RandomAccessIterator __begin, _RandomAccessIterator __end, _Compare __comp) { 2175 if (__n < __end - __begin) 2176 std::partial_sort(__begin, __begin + __n, __end, __comp); 2177 else 2178 std::sort(__begin, __end, __comp); 2179 }, 2180 __n); 2181 }); 2182} 2183 2184//------------------------------------------------------------------------ 2185// partial_sort_copy 2186//------------------------------------------------------------------------ 2187 2188template <class _ExecutionPolicy, class _ForwardIterator, class _RandomAccessIterator, class _Compare, class _IsVector> 2189_RandomAccessIterator 2190__pattern_partial_sort_copy(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, 2191 _RandomAccessIterator __d_first, _RandomAccessIterator __d_last, _Compare __comp, _IsVector, 2192 /*is_parallel=*/std::false_type) noexcept 2193{ 2194 return std::partial_sort_copy(__first, __last, __d_first, __d_last, __comp); 2195} 2196 2197template <class _ExecutionPolicy, class _ForwardIterator, class _RandomAccessIterator, class _Compare, class _IsVector> 2198_RandomAccessIterator 2199__pattern_partial_sort_copy(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, 2200 _RandomAccessIterator __d_first, _RandomAccessIterator __d_last, _Compare __comp, 2201 _IsVector __is_vector, /*is_parallel=*/std::true_type) 2202{ 2203 if (__last == __first || __d_last == __d_first) 2204 { 2205 return __d_first; 2206 } 2207 auto __n1 = __last - __first; 2208 auto __n2 = __d_last - __d_first; 2209 return __internal::__except_handler([&]() { 2210 if (__n2 >= __n1) 2211 { 2212 __par_backend::__parallel_stable_sort( 2213 std::forward<_ExecutionPolicy>(__exec), __d_first, __d_first + __n1, __comp, 2214 [__first, __d_first, __is_vector](_RandomAccessIterator __i, _RandomAccessIterator __j, 2215 _Compare __comp) { 2216 _ForwardIterator __i1 = __first + (__i - __d_first); 2217 _ForwardIterator __j1 = __first + (__j - __d_first); 2218 2219 // 1. Copy elements from input to output 2220# if !_PSTL_ICC_18_OMP_SIMD_BROKEN 2221 __internal::__brick_copy(__i1, __j1, __i, __is_vector); 2222# else 2223 std::copy(__i1, __j1, __i); 2224# endif 2225 // 2. Sort elements in output sequence 2226 std::sort(__i, __j, __comp); 2227 }, 2228 __n1); 2229 return __d_first + __n1; 2230 } 2231 else 2232 { 2233 typedef typename std::iterator_traits<_ForwardIterator>::value_type _T1; 2234 typedef typename std::iterator_traits<_RandomAccessIterator>::value_type _T2; 2235 __par_backend::__buffer<_T1> __buf(__n1); 2236 _T1* __r = __buf.get(); 2237 2238 __par_backend::__parallel_stable_sort(std::forward<_ExecutionPolicy>(__exec), __r, __r + __n1, __comp, 2239 [__n2, __first, __r](_T1* __i, _T1* __j, _Compare __comp) { 2240 _ForwardIterator __it = __first + (__i - __r); 2241 2242 // 1. Copy elements from input to raw memory 2243 for (_T1* __k = __i; __k != __j; ++__k, ++__it) 2244 { 2245 ::new (__k) _T2(*__it); 2246 } 2247 2248 // 2. Sort elements in temporary __buffer 2249 if (__n2 < __j - __i) 2250 std::partial_sort(__i, __i + __n2, __j, __comp); 2251 else 2252 std::sort(__i, __j, __comp); 2253 }, 2254 __n2); 2255 2256 // 3. Move elements from temporary __buffer to output 2257 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __r, __r + __n2, 2258 [__r, __d_first, __is_vector](_T1* __i, _T1* __j) { 2259 __brick_move_destroy()( 2260 __i, __j, __d_first + (__i - __r), __is_vector); 2261 }); 2262 __par_backend::__parallel_for( 2263 std::forward<_ExecutionPolicy>(__exec), __r + __n2, __r + __n1, 2264 [__is_vector](_T1* __i, _T1* __j) { __brick_destroy(__i, __j, __is_vector); }); 2265 2266 return __d_first + __n2; 2267 } 2268 }); 2269} 2270 2271//------------------------------------------------------------------------ 2272// adjacent_find 2273//------------------------------------------------------------------------ 2274template <class _ForwardIterator, class _BinaryPredicate> 2275_ForwardIterator 2276__brick_adjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred, 2277 /* IsVector = */ std::true_type, bool __or_semantic) noexcept 2278{ 2279 return __unseq_backend::__simd_adjacent_find(__first, __last, __pred, __or_semantic); 2280} 2281 2282template <class _ForwardIterator, class _BinaryPredicate> 2283_ForwardIterator 2284__brick_adjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred, 2285 /* IsVector = */ std::false_type, bool) noexcept 2286{ 2287 return std::adjacent_find(__first, __last, __pred); 2288} 2289 2290template <class _ExecutionPolicy, class _ForwardIterator, class _BinaryPredicate, class _IsVector> 2291_ForwardIterator 2292__pattern_adjacent_find(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred, 2293 /* is_parallel */ std::false_type, _IsVector __is_vector, bool __or_semantic) noexcept 2294{ 2295 return __internal::__brick_adjacent_find(__first, __last, __pred, __is_vector, __or_semantic); 2296} 2297 2298template <class _ExecutionPolicy, class _RandomAccessIterator, class _BinaryPredicate, class _IsVector> 2299_RandomAccessIterator 2300__pattern_adjacent_find(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, 2301 _BinaryPredicate __pred, /* is_parallel */ std::true_type, _IsVector __is_vector, 2302 bool __or_semantic) 2303{ 2304 if (__last - __first < 2) 2305 return __last; 2306 2307 return __internal::__except_handler([&]() { 2308 return __par_backend::__parallel_reduce( 2309 std::forward<_ExecutionPolicy>(__exec), __first, __last, __last, 2310 [__last, __pred, __is_vector, __or_semantic](_RandomAccessIterator __begin, _RandomAccessIterator __end, 2311 _RandomAccessIterator __value) -> _RandomAccessIterator { 2312 // TODO: investigate performance benefits from the use of shared variable for the result, 2313 // checking (compare_and_swap idiom) its __value at __first. 2314 if (__or_semantic && __value < __last) 2315 { //found 2316 __par_backend::__cancel_execution(); 2317 return __value; 2318 } 2319 2320 if (__value > __begin) 2321 { 2322 // modify __end to check the predicate on the boundary __values; 2323 // TODO: to use a custom range with boundaries overlapping 2324 // TODO: investigate what if we remove "if" below and run algorithm on range [__first, __last-1) 2325 // then check the pair [__last-1, __last) 2326 if (__end != __last) 2327 ++__end; 2328 2329 //correct the global result iterator if the "brick" returns a local "__last" 2330 const _RandomAccessIterator __res = 2331 __internal::__brick_adjacent_find(__begin, __end, __pred, __is_vector, __or_semantic); 2332 if (__res < __end) 2333 __value = __res; 2334 } 2335 return __value; 2336 }, 2337 [](_RandomAccessIterator __x, _RandomAccessIterator __y) -> _RandomAccessIterator { 2338 return __x < __y ? __x : __y; 2339 } //reduce a __value 2340 ); 2341 }); 2342} 2343 2344//------------------------------------------------------------------------ 2345// nth_element 2346//------------------------------------------------------------------------ 2347 2348template <class _ExecutionPolicy, class _RandomAccessIterator, class _Compare, class _IsVector> 2349void 2350__pattern_nth_element(_ExecutionPolicy&&, _RandomAccessIterator __first, _RandomAccessIterator __nth, 2351 _RandomAccessIterator __last, _Compare __comp, _IsVector, 2352 /*is_parallel=*/std::false_type) noexcept 2353{ 2354 std::nth_element(__first, __nth, __last, __comp); 2355} 2356 2357template <class _ExecutionPolicy, class _RandomAccessIterator, class _Compare, class _IsVector> 2358void 2359__pattern_nth_element(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __nth, 2360 _RandomAccessIterator __last, _Compare __comp, _IsVector __is_vector, 2361 /*is_parallel=*/std::true_type) noexcept 2362{ 2363 if (__first == __last || __nth == __last) 2364 { 2365 return; 2366 } 2367 2368 using std::iter_swap; 2369 typedef typename std::iterator_traits<_RandomAccessIterator>::value_type _Tp; 2370 _RandomAccessIterator __x; 2371 do 2372 { 2373 __x = __internal::__pattern_partition(std::forward<_ExecutionPolicy>(__exec), __first + 1, __last, 2374 [&__comp, __first](const _Tp& __x) { return __comp(__x, *__first); }, 2375 __is_vector, 2376 /*is_parallel=*/std::true_type()); 2377 --__x; 2378 if (__x != __first) 2379 { 2380 iter_swap(__first, __x); 2381 } 2382 // if x > nth then our new range for partition is [first, x) 2383 if (__x - __nth > 0) 2384 { 2385 __last = __x; 2386 } 2387 // if x < nth then our new range for partition is [x, last) 2388 else if (__x - __nth < 0) 2389 { 2390 // if *x == *nth then we can start new partition with x+1 2391 if (!__comp(*__nth, *__x) && !__comp(*__x, *__nth)) 2392 { 2393 ++__x; 2394 } 2395 else 2396 { 2397 iter_swap(__nth, __x); 2398 } 2399 __first = __x; 2400 } 2401 } while (__x != __nth); 2402} 2403 2404//------------------------------------------------------------------------ 2405// fill, fill_n 2406//------------------------------------------------------------------------ 2407template <class _ForwardIterator, class _Tp> 2408void 2409__brick_fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, 2410 /* __is_vector = */ std::true_type) noexcept 2411{ 2412 __unseq_backend::__simd_fill_n(__first, __last - __first, __value); 2413} 2414 2415template <class _ForwardIterator, class _Tp> 2416void 2417__brick_fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, 2418 /* __is_vector = */ std::false_type) noexcept 2419{ 2420 std::fill(__first, __last, __value); 2421} 2422 2423template <class _ExecutionPolicy, class _ForwardIterator, class _Tp, class _IsVector> 2424void 2425__pattern_fill(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, 2426 /*is_parallel=*/std::false_type, _IsVector __is_vector) noexcept 2427{ 2428 __internal::__brick_fill(__first, __last, __value, __is_vector); 2429} 2430 2431template <class _ExecutionPolicy, class _ForwardIterator, class _Tp, class _IsVector> 2432_ForwardIterator 2433__pattern_fill(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, 2434 /*is_parallel=*/std::true_type, _IsVector __is_vector) 2435{ 2436 return __internal::__except_handler([&__exec, __first, __last, &__value, __is_vector]() { 2437 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __first, __last, 2438 [&__value, __is_vector](_ForwardIterator __begin, _ForwardIterator __end) { 2439 __internal::__brick_fill(__begin, __end, __value, __is_vector); 2440 }); 2441 return __last; 2442 }); 2443} 2444 2445template <class _OutputIterator, class _Size, class _Tp> 2446_OutputIterator 2447__brick_fill_n(_OutputIterator __first, _Size __count, const _Tp& __value, /* __is_vector = */ std::true_type) noexcept 2448{ 2449 return __unseq_backend::__simd_fill_n(__first, __count, __value); 2450} 2451 2452template <class _OutputIterator, class _Size, class _Tp> 2453_OutputIterator 2454__brick_fill_n(_OutputIterator __first, _Size __count, const _Tp& __value, /* __is_vector = */ std::false_type) noexcept 2455{ 2456 return std::fill_n(__first, __count, __value); 2457} 2458 2459template <class _ExecutionPolicy, class _OutputIterator, class _Size, class _Tp, class _IsVector> 2460_OutputIterator 2461__pattern_fill_n(_ExecutionPolicy&&, _OutputIterator __first, _Size __count, const _Tp& __value, 2462 /*is_parallel=*/std::false_type, _IsVector __is_vector) noexcept 2463{ 2464 return __internal::__brick_fill_n(__first, __count, __value, __is_vector); 2465} 2466 2467template <class _ExecutionPolicy, class _OutputIterator, class _Size, class _Tp, class _IsVector> 2468_OutputIterator 2469__pattern_fill_n(_ExecutionPolicy&& __exec, _OutputIterator __first, _Size __count, const _Tp& __value, 2470 /*is_parallel=*/std::true_type, _IsVector __is_vector) 2471{ 2472 return __internal::__pattern_fill(std::forward<_ExecutionPolicy>(__exec), __first, __first + __count, __value, 2473 std::true_type(), __is_vector); 2474} 2475 2476//------------------------------------------------------------------------ 2477// generate, generate_n 2478//------------------------------------------------------------------------ 2479template <class _RandomAccessIterator, class _Generator> 2480void 2481__brick_generate(_RandomAccessIterator __first, _RandomAccessIterator __last, _Generator __g, 2482 /* is_vector = */ std::true_type) noexcept 2483{ 2484 __unseq_backend::__simd_generate_n(__first, __last - __first, __g); 2485} 2486 2487template <class _ForwardIterator, class _Generator> 2488void 2489__brick_generate(_ForwardIterator __first, _ForwardIterator __last, _Generator __g, 2490 /* is_vector = */ std::false_type) noexcept 2491{ 2492 std::generate(__first, __last, __g); 2493} 2494 2495template <class _ExecutionPolicy, class _ForwardIterator, class _Generator, class _IsVector> 2496void 2497__pattern_generate(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Generator __g, 2498 /*is_parallel=*/std::false_type, _IsVector __is_vector) noexcept 2499{ 2500 __internal::__brick_generate(__first, __last, __g, __is_vector); 2501} 2502 2503template <class _ExecutionPolicy, class _ForwardIterator, class _Generator, class _IsVector> 2504_ForwardIterator 2505__pattern_generate(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Generator __g, 2506 /*is_parallel=*/std::true_type, _IsVector __is_vector) 2507{ 2508 return __internal::__except_handler([&]() { 2509 __par_backend::__parallel_for(std::forward<_ExecutionPolicy>(__exec), __first, __last, 2510 [__g, __is_vector](_ForwardIterator __begin, _ForwardIterator __end) { 2511 __internal::__brick_generate(__begin, __end, __g, __is_vector); 2512 }); 2513 return __last; 2514 }); 2515} 2516 2517template <class OutputIterator, class Size, class _Generator> 2518OutputIterator 2519__brick_generate_n(OutputIterator __first, Size __count, _Generator __g, /* is_vector = */ std::true_type) noexcept 2520{ 2521 return __unseq_backend::__simd_generate_n(__first, __count, __g); 2522} 2523 2524template <class OutputIterator, class Size, class _Generator> 2525OutputIterator 2526__brick_generate_n(OutputIterator __first, Size __count, _Generator __g, /* is_vector = */ std::false_type) noexcept 2527{ 2528 return std::generate_n(__first, __count, __g); 2529} 2530 2531template <class _ExecutionPolicy, class _OutputIterator, class _Size, class _Generator, class _IsVector> 2532_OutputIterator 2533__pattern_generate_n(_ExecutionPolicy&&, _OutputIterator __first, _Size __count, _Generator __g, 2534 /*is_parallel=*/std::false_type, _IsVector __is_vector) noexcept 2535{ 2536 return __internal::__brick_generate_n(__first, __count, __g, __is_vector); 2537} 2538 2539template <class _ExecutionPolicy, class _OutputIterator, class _Size, class _Generator, class _IsVector> 2540_OutputIterator 2541__pattern_generate_n(_ExecutionPolicy&& __exec, _OutputIterator __first, _Size __count, _Generator __g, 2542 /*is_parallel=*/std::true_type, _IsVector __is_vector) 2543{ 2544 static_assert(__is_random_access_iterator<_OutputIterator>::value, 2545 "Pattern-brick error. Should be a random access iterator."); 2546 return __internal::__pattern_generate(std::forward<_ExecutionPolicy>(__exec), __first, __first + __count, __g, 2547 std::true_type(), __is_vector); 2548} 2549 2550//------------------------------------------------------------------------ 2551// remove 2552//------------------------------------------------------------------------ 2553 2554template <class _ForwardIterator, class _UnaryPredicate> 2555_ForwardIterator 2556__brick_remove_if(_ForwardIterator __first, _ForwardIterator __last, _UnaryPredicate __pred, 2557 /* __is_vector = */ std::false_type) noexcept 2558{ 2559 return std::remove_if(__first, __last, __pred); 2560} 2561 2562template <class _RandomAccessIterator, class _UnaryPredicate> 2563_RandomAccessIterator 2564__brick_remove_if(_RandomAccessIterator __first, _RandomAccessIterator __last, _UnaryPredicate __pred, 2565 /* __is_vector = */ std::true_type) noexcept 2566{ 2567#if _PSTL_MONOTONIC_PRESENT 2568 return __unseq_backend::__simd_remove_if(__first, __last - __first, __pred); 2569#else 2570 return std::remove_if(__first, __last, __pred); 2571#endif 2572} 2573 2574template <class _ExecutionPolicy, class _ForwardIterator, class _UnaryPredicate, class _IsVector> 2575_ForwardIterator 2576__pattern_remove_if(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _UnaryPredicate __pred, 2577 _IsVector __is_vector, /*is_parallel*/ std::false_type) noexcept 2578{ 2579 return __internal::__brick_remove_if(__first, __last, __pred, __is_vector); 2580} 2581 2582template <class _ExecutionPolicy, class _ForwardIterator, class _UnaryPredicate, class _IsVector> 2583_ForwardIterator 2584__pattern_remove_if(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, 2585 _UnaryPredicate __pred, _IsVector __is_vector, /*is_parallel*/ std::true_type) noexcept 2586{ 2587 typedef typename std::iterator_traits<_ForwardIterator>::reference _ReferenceType; 2588 2589 if (__first == __last || __first + 1 == __last) 2590 { 2591 // Trivial sequence - use serial algorithm 2592 return __internal::__brick_remove_if(__first, __last, __pred, __is_vector); 2593 } 2594 2595 return __internal::__remove_elements( 2596 std::forward<_ExecutionPolicy>(__exec), __first, __last, 2597 [&__pred, __is_vector](bool* __b, bool* __e, _ForwardIterator __it) { 2598 __internal::__brick_walk2(__b, __e, __it, [&__pred](bool& __x, _ReferenceType __y) { __x = !__pred(__y); }, 2599 __is_vector); 2600 }, 2601 __is_vector); 2602} 2603 2604//------------------------------------------------------------------------ 2605// merge 2606//------------------------------------------------------------------------ 2607 2608template <class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, class _Compare> 2609_OutputIterator 2610__brick_merge(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 2611 _ForwardIterator2 __last2, _OutputIterator __d_first, _Compare __comp, 2612 /* __is_vector = */ std::false_type) noexcept 2613{ 2614 return std::merge(__first1, __last1, __first2, __last2, __d_first, __comp); 2615} 2616 2617template <class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, class _Compare> 2618_OutputIterator 2619__brick_merge(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 2620 _ForwardIterator2 __last2, _OutputIterator __d_first, _Compare __comp, 2621 /* __is_vector = */ std::true_type) noexcept 2622{ 2623 _PSTL_PRAGMA_MESSAGE("Vectorized algorithm unimplemented, redirected to serial"); 2624 return std::merge(__first1, __last1, __first2, __last2, __d_first, __comp); 2625} 2626 2627template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 2628 class _Compare, class _IsVector> 2629_OutputIterator 2630__pattern_merge(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 2631 _ForwardIterator2 __last2, _OutputIterator __d_first, _Compare __comp, _IsVector __is_vector, 2632 /* is_parallel = */ std::false_type) noexcept 2633{ 2634 return __internal::__brick_merge(__first1, __last1, __first2, __last2, __d_first, __comp, __is_vector); 2635} 2636 2637template <class _ExecutionPolicy, class _RandomAccessIterator1, class _RandomAccessIterator2, class _OutputIterator, 2638 class _Compare, class _IsVector> 2639_OutputIterator 2640__pattern_merge(_ExecutionPolicy&& __exec, _RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 2641 _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _OutputIterator __d_first, 2642 _Compare __comp, _IsVector __is_vector, /* is_parallel = */ std::true_type) 2643{ 2644 __par_backend::__parallel_merge( 2645 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __first2, __last2, __d_first, __comp, 2646 [__is_vector](_RandomAccessIterator1 __f1, _RandomAccessIterator1 __l1, _RandomAccessIterator2 __f2, 2647 _RandomAccessIterator2 __l2, _OutputIterator __f3, _Compare __comp) { 2648 return __internal::__brick_merge(__f1, __l1, __f2, __l2, __f3, __comp, __is_vector); 2649 }); 2650 return __d_first + (__last1 - __first1) + (__last2 - __first2); 2651} 2652 2653//------------------------------------------------------------------------ 2654// inplace_merge 2655//------------------------------------------------------------------------ 2656template <class _BidirectionalIterator, class _Compare> 2657void 2658__brick_inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, 2659 _Compare __comp, /* __is_vector = */ std::false_type) noexcept 2660{ 2661 std::inplace_merge(__first, __middle, __last, __comp); 2662} 2663 2664template <class _BidirectionalIterator, class _Compare> 2665void 2666__brick_inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, 2667 _Compare __comp, /* __is_vector = */ std::true_type) noexcept 2668{ 2669 _PSTL_PRAGMA_MESSAGE("Vectorized algorithm unimplemented, redirected to serial") 2670 std::inplace_merge(__first, __middle, __last, __comp); 2671} 2672 2673template <class _ExecutionPolicy, class _BidirectionalIterator, class _Compare, class _IsVector> 2674void 2675__pattern_inplace_merge(_ExecutionPolicy&&, _BidirectionalIterator __first, _BidirectionalIterator __middle, 2676 _BidirectionalIterator __last, _Compare __comp, _IsVector __is_vector, 2677 /* is_parallel = */ std::false_type) noexcept 2678{ 2679 __internal::__brick_inplace_merge(__first, __middle, __last, __comp, __is_vector); 2680} 2681 2682template <class _ExecutionPolicy, class _BidirectionalIterator, class _Compare, class _IsVector> 2683void 2684__pattern_inplace_merge(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __middle, 2685 _BidirectionalIterator __last, _Compare __comp, _IsVector __is_vector, 2686 /*is_parallel=*/std::true_type) 2687{ 2688 if (__first == __last || __first == __middle || __middle == __last) 2689 { 2690 return; 2691 } 2692 typedef typename std::iterator_traits<_BidirectionalIterator>::value_type _Tp; 2693 auto __n = __last - __first; 2694 __par_backend::__buffer<_Tp> __buf(__n); 2695 _Tp* __r = __buf.get(); 2696 __internal::__except_handler([&]() { 2697 auto __move_values = [](_BidirectionalIterator __x, _Tp* __z) { 2698 __internal::__invoke_if_else(std::is_trivial<_Tp>(), [&]() { *__z = std::move(*__x); }, 2699 [&]() { ::new (std::addressof(*__z)) _Tp(std::move(*__x)); }); 2700 }; 2701 2702 auto __move_sequences = [](_BidirectionalIterator __first1, _BidirectionalIterator __last1, _Tp* __first2) { 2703 return __internal::__brick_uninitialized_move(__first1, __last1, __first2, _IsVector()); 2704 }; 2705 2706 __par_backend::__parallel_merge( 2707 std::forward<_ExecutionPolicy>(__exec), __first, __middle, __middle, __last, __r, __comp, 2708 [__n, __move_values, __move_sequences](_BidirectionalIterator __f1, _BidirectionalIterator __l1, 2709 _BidirectionalIterator __f2, _BidirectionalIterator __l2, _Tp* __f3, 2710 _Compare __comp) { 2711 (__utils::__serial_move_merge(__n))(__f1, __l1, __f2, __l2, __f3, __comp, __move_values, __move_values, 2712 __move_sequences, __move_sequences); 2713 return __f3 + (__l1 - __f1) + (__l2 - __f2); 2714 }); 2715 __par_backend::__parallel_for( 2716 std::forward<_ExecutionPolicy>(__exec), __r, __r + __n, [__r, __first, __is_vector](_Tp* __i, _Tp* __j) { 2717 __brick_move_destroy()(__i, __j, __first + (__i - __r), __is_vector); 2718 }); 2719 }); 2720} 2721 2722//------------------------------------------------------------------------ 2723// includes 2724//------------------------------------------------------------------------ 2725 2726template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Compare, class _IsVector> 2727bool 2728__pattern_includes(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 2729 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _Compare __comp, _IsVector, 2730 /*is_parallel=*/std::false_type) noexcept 2731{ 2732 return std::includes(__first1, __last1, __first2, __last2, __comp); 2733} 2734 2735template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Compare, class _IsVector> 2736bool 2737__pattern_includes(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 2738 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _Compare __comp, _IsVector, 2739 /*is_parallel=*/std::true_type) 2740{ 2741 if (__first2 >= __last2) 2742 return true; 2743 2744 if (__first1 >= __last1 || __comp(*__first2, *__first1) || __comp(*(__last1 - 1), *(__last2 - 1))) 2745 return false; 2746 2747 __first1 = std::lower_bound(__first1, __last1, *__first2, __comp); 2748 if (__first1 == __last1) 2749 return false; 2750 2751 if (__last2 - __first2 == 1) 2752 return !__comp(*__first1, *__first2) && !__comp(*__first2, *__first1); 2753 2754 return __internal::__except_handler([&]() { 2755 return !__internal::__parallel_or( 2756 std::forward<_ExecutionPolicy>(__exec), __first2, __last2, 2757 [__first1, __last1, __first2, __last2, &__comp](_ForwardIterator2 __i, _ForwardIterator2 __j) { 2758 _PSTL_ASSERT(__j > __i); 2759 //assert(__j - __i > 1); 2760 2761 //1. moving boundaries to "consume" subsequence of equal elements 2762 auto __is_equal = [&__comp](_ForwardIterator2 __a, _ForwardIterator2 __b) -> bool { 2763 return !__comp(*__a, *__b) && !__comp(*__b, *__a); 2764 }; 2765 2766 //1.1 left bound, case "aaa[aaaxyz...]" - searching "x" 2767 if (__i > __first2 && __is_equal(__i, __i - 1)) 2768 { 2769 //whole subrange continues to content equal elements - return "no op" 2770 if (__is_equal(__i, __j - 1)) 2771 return false; 2772 2773 __i = std::upper_bound(__i, __last2, *__i, __comp); 2774 } 2775 2776 //1.2 right bound, case "[...aaa]aaaxyz" - searching "x" 2777 if (__j < __last2 && __is_equal(__j - 1, __j)) 2778 __j = std::upper_bound(__j, __last2, *__j, __comp); 2779 2780 //2. testing is __a subsequence of the second range included into the first range 2781 auto __b = std::lower_bound(__first1, __last1, *__i, __comp); 2782 2783 _PSTL_ASSERT(!__comp(*(__last1 - 1), *__b)); 2784 _PSTL_ASSERT(!__comp(*(__j - 1), *__i)); 2785 return !std::includes(__b, __last1, __i, __j, __comp); 2786 }); 2787 }); 2788} 2789 2790constexpr auto __set_algo_cut_off = 1000; 2791 2792template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 2793 class _Compare, class _IsVector, class _SizeFunction, class _SetOP> 2794_OutputIterator 2795__parallel_set_op(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 2796 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 2797 _SizeFunction __size_func, _SetOP __set_op, _IsVector __is_vector) 2798{ 2799 typedef typename std::iterator_traits<_ForwardIterator1>::difference_type _DifferenceType; 2800 typedef typename std::iterator_traits<_OutputIterator>::value_type _Tp; 2801 2802 struct _SetRange 2803 { 2804 _DifferenceType __pos, __len, __buf_pos; 2805 bool 2806 empty() const 2807 { 2808 return __len == 0; 2809 } 2810 }; 2811 2812 const _DifferenceType __n1 = __last1 - __first1; 2813 const _DifferenceType __n2 = __last2 - __first2; 2814 2815 __par_backend::__buffer<_Tp> __buf(__size_func(__n1, __n2)); 2816 2817 return __internal::__except_handler([&__exec, __n1, __first1, __last1, __first2, __last2, __result, __is_vector, 2818 __comp, __size_func, __set_op, &__buf]() { 2819 auto __buffer = __buf.get(); 2820 _DifferenceType __m{}; 2821 auto __scan = [=](_DifferenceType, _DifferenceType, const _SetRange& __s) { // Scan 2822 if (!__s.empty()) 2823 __brick_move_destroy()(__buffer + __s.__buf_pos, 2824 __buffer + (__s.__buf_pos + __s.__len), __result + __s.__pos, 2825 __is_vector); 2826 }; 2827 __par_backend::__parallel_strict_scan( 2828 std::forward<_ExecutionPolicy>(__exec), __n1, _SetRange{0, 0, 0}, //-1, 0}, 2829 [=](_DifferenceType __i, _DifferenceType __len) { // Reduce 2830 //[__b; __e) - a subrange of the first sequence, to reduce 2831 _ForwardIterator1 __b = __first1 + __i, __e = __first1 + (__i + __len); 2832 2833 //try searching for the first element which not equal to *__b 2834 if (__b != __first1) 2835 __b = std::upper_bound(__b, __last1, *__b, __comp); 2836 2837 //try searching for the first element which not equal to *__e 2838 if (__e != __last1) 2839 __e = std::upper_bound(__e, __last1, *__e, __comp); 2840 2841 //check is [__b; __e) empty 2842 if (__e - __b < 1) 2843 { 2844 _ForwardIterator2 __bb = __last2; 2845 if (__b != __last1) 2846 __bb = std::lower_bound(__first2, __last2, *__b, __comp); 2847 2848 const _DifferenceType __buf_pos = __size_func((__b - __first1), (__bb - __first2)); 2849 return _SetRange{0, 0, __buf_pos}; 2850 } 2851 2852 //try searching for "corresponding" subrange [__bb; __ee) in the second sequence 2853 _ForwardIterator2 __bb = __first2; 2854 if (__b != __first1) 2855 __bb = std::lower_bound(__first2, __last2, *__b, __comp); 2856 2857 _ForwardIterator2 __ee = __last2; 2858 if (__e != __last1) 2859 __ee = std::lower_bound(__bb, __last2, *__e, __comp); 2860 2861 const _DifferenceType __buf_pos = __size_func((__b - __first1), (__bb - __first2)); 2862 auto __buffer_b = __buffer + __buf_pos; 2863 auto __res = __set_op(__b, __e, __bb, __ee, __buffer_b, __comp); 2864 2865 return _SetRange{0, __res - __buffer_b, __buf_pos}; 2866 }, 2867 [](const _SetRange& __a, const _SetRange& __b) { // Combine 2868 if (__b.__buf_pos > __a.__buf_pos || ((__b.__buf_pos == __a.__buf_pos) && !__b.empty())) 2869 return _SetRange{__a.__pos + __a.__len + __b.__pos, __b.__len, __b.__buf_pos}; 2870 return _SetRange{__b.__pos + __b.__len + __a.__pos, __a.__len, __a.__buf_pos}; 2871 }, 2872 __scan, // Scan 2873 [&__m, &__scan](const _SetRange& __total) { // Apex 2874 //final scan 2875 __scan(0, 0, __total); 2876 __m = __total.__pos + __total.__len; 2877 }); 2878 return __result + __m; 2879 }); 2880} 2881 2882//a shared parallel pattern for '__pattern_set_union' and '__pattern_set_symmetric_difference' 2883template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 2884 class _Compare, class _SetUnionOp, class _IsVector> 2885_OutputIterator 2886__parallel_set_union_op(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 2887 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _OutputIterator __result, 2888 _Compare __comp, _SetUnionOp __set_union_op, _IsVector __is_vector) 2889{ 2890 typedef typename std::iterator_traits<_ForwardIterator1>::difference_type _DifferenceType; 2891 2892 const auto __n1 = __last1 - __first1; 2893 const auto __n2 = __last2 - __first2; 2894 2895 auto __copy_range1 = [__is_vector](_ForwardIterator1 __begin, _ForwardIterator1 __end, _OutputIterator __res) { 2896 return __internal::__brick_copy(__begin, __end, __res, __is_vector); 2897 }; 2898 auto __copy_range2 = [__is_vector](_ForwardIterator2 __begin, _ForwardIterator2 __end, _OutputIterator __res) { 2899 return __internal::__brick_copy(__begin, __end, __res, __is_vector); 2900 }; 2901 2902 // {1} {}: parallel copying just first sequence 2903 if (__n2 == 0) 2904 return __internal::__pattern_walk2_brick(std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __result, 2905 __copy_range1, std::true_type()); 2906 2907 // {} {2}: parallel copying justmake second sequence 2908 if (__n1 == 0) 2909 return __internal::__pattern_walk2_brick(std::forward<_ExecutionPolicy>(__exec), __first2, __last2, __result, 2910 __copy_range2, std::true_type()); 2911 2912 // testing whether the sequences are intersected 2913 _ForwardIterator1 __left_bound_seq_1 = std::lower_bound(__first1, __last1, *__first2, __comp); 2914 2915 if (__left_bound_seq_1 == __last1) 2916 { 2917 //{1} < {2}: seq2 is wholly greater than seq1, so, do parallel copying seq1 and seq2 2918 __par_backend::__parallel_invoke( 2919 std::forward<_ExecutionPolicy>(__exec), 2920 [=] { 2921 __internal::__pattern_walk2_brick(std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __result, 2922 __copy_range1, std::true_type()); 2923 }, 2924 [=] { 2925 __internal::__pattern_walk2_brick(std::forward<_ExecutionPolicy>(__exec), __first2, __last2, 2926 __result + __n1, __copy_range2, std::true_type()); 2927 }); 2928 return __result + __n1 + __n2; 2929 } 2930 2931 // testing whether the sequences are intersected 2932 _ForwardIterator2 __left_bound_seq_2 = std::lower_bound(__first2, __last2, *__first1, __comp); 2933 2934 if (__left_bound_seq_2 == __last2) 2935 { 2936 //{2} < {1}: seq2 is wholly greater than seq1, so, do parallel copying seq1 and seq2 2937 __par_backend::__parallel_invoke( 2938 std::forward<_ExecutionPolicy>(__exec), 2939 [=] { 2940 __internal::__pattern_walk2_brick(std::forward<_ExecutionPolicy>(__exec), __first2, __last2, __result, 2941 __copy_range2, std::true_type()); 2942 }, 2943 [=] { 2944 __internal::__pattern_walk2_brick(std::forward<_ExecutionPolicy>(__exec), __first1, __last1, 2945 __result + __n2, __copy_range1, std::true_type()); 2946 }); 2947 return __result + __n1 + __n2; 2948 } 2949 2950 const auto __m1 = __left_bound_seq_1 - __first1; 2951 if (__m1 > __set_algo_cut_off) 2952 { 2953 auto __res_or = __result; 2954 __result += __m1; //we know proper offset due to [first1; left_bound_seq_1) < [first2; last2) 2955 __par_backend::__parallel_invoke( 2956 std::forward<_ExecutionPolicy>(__exec), 2957 //do parallel copying of [first1; left_bound_seq_1) 2958 [=] { 2959 __internal::__pattern_walk2_brick(std::forward<_ExecutionPolicy>(__exec), __first1, __left_bound_seq_1, 2960 __res_or, __copy_range1, std::true_type()); 2961 }, 2962 [=, &__result] { 2963 __result = __internal::__parallel_set_op( 2964 std::forward<_ExecutionPolicy>(__exec), __left_bound_seq_1, __last1, __first2, __last2, __result, 2965 __comp, [](_DifferenceType __n, _DifferenceType __m) { return __n + __m; }, __set_union_op, 2966 __is_vector); 2967 }); 2968 return __result; 2969 } 2970 2971 const auto __m2 = __left_bound_seq_2 - __first2; 2972 _PSTL_ASSERT(__m1 == 0 || __m2 == 0); 2973 if (__m2 > __set_algo_cut_off) 2974 { 2975 auto __res_or = __result; 2976 __result += __m2; //we know proper offset due to [first2; left_bound_seq_2) < [first1; last1) 2977 __par_backend::__parallel_invoke( 2978 std::forward<_ExecutionPolicy>(__exec), 2979 //do parallel copying of [first2; left_bound_seq_2) 2980 [=] { 2981 __internal::__pattern_walk2_brick(std::forward<_ExecutionPolicy>(__exec), __first2, __left_bound_seq_2, 2982 __res_or, __copy_range2, std::true_type()); 2983 }, 2984 [=, &__result] { 2985 __result = __internal::__parallel_set_op( 2986 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __left_bound_seq_2, __last2, __result, 2987 __comp, [](_DifferenceType __n, _DifferenceType __m) { return __n + __m; }, __set_union_op, 2988 __is_vector); 2989 }); 2990 return __result; 2991 } 2992 2993 return __internal::__parallel_set_op( 2994 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __first2, __last2, __result, __comp, 2995 [](_DifferenceType __n, _DifferenceType __m) { return __n + __m; }, __set_union_op, __is_vector); 2996} 2997 2998//------------------------------------------------------------------------ 2999// set_union 3000//------------------------------------------------------------------------ 3001 3002template <class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, class _Compare> 3003_OutputIterator 3004__brick_set_union(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3005 _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 3006 /*__is_vector=*/std::false_type) noexcept 3007{ 3008 return std::set_union(__first1, __last1, __first2, __last2, __result, __comp); 3009} 3010 3011template <typename _IsVector> 3012struct __BrickCopyConstruct 3013{ 3014 template <typename _ForwardIterator, typename _OutputIterator> 3015 _OutputIterator 3016 operator()(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result) 3017 { 3018 return __brick_uninitialized_copy(__first, __last, __result, _IsVector()); 3019 } 3020}; 3021 3022template <class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, class _Compare> 3023_OutputIterator 3024__brick_set_union(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3025 _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 3026 /*__is_vector=*/std::true_type) noexcept 3027{ 3028 _PSTL_PRAGMA_MESSAGE("Vectorized algorithm unimplemented, redirected to serial"); 3029 return std::set_union(__first1, __last1, __first2, __last2, __result, __comp); 3030} 3031 3032template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 3033 class _Compare, class _IsVector> 3034_OutputIterator 3035__pattern_set_union(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3036 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 3037 _IsVector __is_vector, 3038 /*is_parallel=*/std::false_type) noexcept 3039{ 3040 return __internal::__brick_set_union(__first1, __last1, __first2, __last2, __result, __comp, __is_vector); 3041} 3042 3043template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 3044 class _Compare, class _IsVector> 3045_OutputIterator 3046__pattern_set_union(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3047 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 3048 _IsVector __is_vector, /*__is_parallel=*/std::true_type) 3049{ 3050 3051 const auto __n1 = __last1 - __first1; 3052 const auto __n2 = __last2 - __first2; 3053 3054 // use serial algorithm 3055 if (__n1 + __n2 <= __set_algo_cut_off) 3056 return std::set_union(__first1, __last1, __first2, __last2, __result, __comp); 3057 3058 typedef typename std::iterator_traits<_OutputIterator>::value_type _Tp; 3059 return __parallel_set_union_op( 3060 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __first2, __last2, __result, __comp, 3061 [](_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _ForwardIterator2 __last2, 3062 _Tp* __result, _Compare __comp) { 3063 return __pstl::__utils::__set_union_construct(__first1, __last1, __first2, __last2, __result, __comp, 3064 __BrickCopyConstruct<_IsVector>()); 3065 }, 3066 __is_vector); 3067} 3068 3069//------------------------------------------------------------------------ 3070// set_intersection 3071//------------------------------------------------------------------------ 3072 3073template <class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, class _Compare> 3074_OutputIterator 3075__brick_set_intersection(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3076 _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 3077 /*__is_vector=*/std::false_type) noexcept 3078{ 3079 return std::set_intersection(__first1, __last1, __first2, __last2, __result, __comp); 3080} 3081 3082template <class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, class _Compare> 3083_OutputIterator 3084__brick_set_intersection(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3085 _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 3086 /*__is_vector=*/std::true_type) noexcept 3087{ 3088 _PSTL_PRAGMA_MESSAGE("Vectorized algorithm unimplemented, redirected to serial"); 3089 return std::set_intersection(__first1, __last1, __first2, __last2, __result, __comp); 3090} 3091 3092template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 3093 class _Compare, class _IsVector> 3094_OutputIterator 3095__pattern_set_intersection(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3096 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _OutputIterator __result, 3097 _Compare __comp, _IsVector __is_vector, /*is_parallel=*/std::false_type) noexcept 3098{ 3099 return __internal::__brick_set_intersection(__first1, __last1, __first2, __last2, __result, __comp, __is_vector); 3100} 3101 3102template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 3103 class _Compare, class _IsVector> 3104_OutputIterator 3105__pattern_set_intersection(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3106 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _OutputIterator __result, 3107 _Compare __comp, _IsVector __is_vector, /*is_parallel=*/std::true_type) 3108{ 3109 typedef typename std::iterator_traits<_OutputIterator>::value_type _Tp; 3110 typedef typename std::iterator_traits<_ForwardIterator1>::difference_type _DifferenceType; 3111 3112 const auto __n1 = __last1 - __first1; 3113 const auto __n2 = __last2 - __first2; 3114 3115 // intersection is empty 3116 if (__n1 == 0 || __n2 == 0) 3117 return __result; 3118 3119 // testing whether the sequences are intersected 3120 _ForwardIterator1 __left_bound_seq_1 = std::lower_bound(__first1, __last1, *__first2, __comp); 3121 //{1} < {2}: seq 2 is wholly greater than seq 1, so, the intersection is empty 3122 if (__left_bound_seq_1 == __last1) 3123 return __result; 3124 3125 // testing whether the sequences are intersected 3126 _ForwardIterator2 __left_bound_seq_2 = std::lower_bound(__first2, __last2, *__first1, __comp); 3127 //{2} < {1}: seq 1 is wholly greater than seq 2, so, the intersection is empty 3128 if (__left_bound_seq_2 == __last2) 3129 return __result; 3130 3131 const auto __m1 = __last1 - __left_bound_seq_1 + __n2; 3132 if (__m1 > __set_algo_cut_off) 3133 { 3134 //we know proper offset due to [first1; left_bound_seq_1) < [first2; last2) 3135 return __internal::__parallel_set_op( 3136 std::forward<_ExecutionPolicy>(__exec), __left_bound_seq_1, __last1, __first2, __last2, __result, __comp, 3137 [](_DifferenceType __n, _DifferenceType __m) { return std::min(__n, __m); }, 3138 [](_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3139 _ForwardIterator2 __last2, _Tp* __result, _Compare __comp) { 3140 return __pstl::__utils::__set_intersection_construct(__first1, __last1, __first2, __last2, __result, 3141 __comp); 3142 }, 3143 __is_vector); 3144 } 3145 3146 const auto __m2 = __last2 - __left_bound_seq_2 + __n1; 3147 if (__m2 > __set_algo_cut_off) 3148 { 3149 //we know proper offset due to [first2; left_bound_seq_2) < [first1; last1) 3150 __result = __internal::__parallel_set_op( 3151 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __left_bound_seq_2, __last2, __result, __comp, 3152 [](_DifferenceType __n, _DifferenceType __m) { return std::min(__n, __m); }, 3153 [](_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3154 _ForwardIterator2 __last2, _Tp* __result, _Compare __comp) { 3155 return __pstl::__utils::__set_intersection_construct(__first2, __last2, __first1, __last1, __result, 3156 __comp); 3157 }, 3158 __is_vector); 3159 return __result; 3160 } 3161 3162 // [left_bound_seq_1; last1) and [left_bound_seq_2; last2) - use serial algorithm 3163 return std::set_intersection(__left_bound_seq_1, __last1, __left_bound_seq_2, __last2, __result, __comp); 3164} 3165 3166//------------------------------------------------------------------------ 3167// set_difference 3168//------------------------------------------------------------------------ 3169 3170template <class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, class _Compare> 3171_OutputIterator 3172__brick_set_difference(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3173 _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 3174 /*__is_vector=*/std::false_type) noexcept 3175{ 3176 return std::set_difference(__first1, __last1, __first2, __last2, __result, __comp); 3177} 3178 3179template <class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, class _Compare> 3180_OutputIterator 3181__brick_set_difference(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3182 _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 3183 /*__is_vector=*/std::true_type) noexcept 3184{ 3185 _PSTL_PRAGMA_MESSAGE("Vectorized algorithm unimplemented, redirected to serial"); 3186 return std::set_difference(__first1, __last1, __first2, __last2, __result, __comp); 3187} 3188 3189template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 3190 class _Compare, class _IsVector> 3191_OutputIterator 3192__pattern_set_difference(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3193 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _OutputIterator __result, 3194 _Compare __comp, _IsVector __is_vector, /*is_parallel=*/std::false_type) noexcept 3195{ 3196 return __internal::__brick_set_difference(__first1, __last1, __first2, __last2, __result, __comp, __is_vector); 3197} 3198 3199template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 3200 class _Compare, class _IsVector> 3201_OutputIterator 3202__pattern_set_difference(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3203 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _OutputIterator __result, 3204 _Compare __comp, _IsVector __is_vector, /*is_parallel=*/std::true_type) 3205{ 3206 typedef typename std::iterator_traits<_OutputIterator>::value_type _Tp; 3207 typedef typename std::iterator_traits<_ForwardIterator1>::difference_type _DifferenceType; 3208 3209 const auto __n1 = __last1 - __first1; 3210 const auto __n2 = __last2 - __first2; 3211 3212 // {} \ {2}: the difference is empty 3213 if (__n1 == 0) 3214 return __result; 3215 3216 // {1} \ {}: parallel copying just first sequence 3217 if (__n2 == 0) 3218 return __internal::__pattern_walk2_brick( 3219 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __result, 3220 [__is_vector](_ForwardIterator1 __begin, _ForwardIterator1 __end, _OutputIterator __res) { 3221 return __internal::__brick_copy(__begin, __end, __res, __is_vector); 3222 }, 3223 std::true_type()); 3224 3225 // testing whether the sequences are intersected 3226 _ForwardIterator1 __left_bound_seq_1 = std::lower_bound(__first1, __last1, *__first2, __comp); 3227 //{1} < {2}: seq 2 is wholly greater than seq 1, so, parallel copying just first sequence 3228 if (__left_bound_seq_1 == __last1) 3229 return __internal::__pattern_walk2_brick( 3230 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __result, 3231 [__is_vector](_ForwardIterator1 __begin, _ForwardIterator1 __end, _OutputIterator __res) { 3232 return __internal::__brick_copy(__begin, __end, __res, __is_vector); 3233 }, 3234 std::true_type()); 3235 3236 // testing whether the sequences are intersected 3237 _ForwardIterator2 __left_bound_seq_2 = std::lower_bound(__first2, __last2, *__first1, __comp); 3238 //{2} < {1}: seq 1 is wholly greater than seq 2, so, parallel copying just first sequence 3239 if (__left_bound_seq_2 == __last2) 3240 return __internal::__pattern_walk2_brick( 3241 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __result, 3242 [__is_vector](_ForwardIterator1 __begin, _ForwardIterator1 __end, _OutputIterator __res) { 3243 return __internal::__brick_copy(__begin, __end, __res, __is_vector); 3244 }, 3245 std::true_type()); 3246 3247 if (__n1 + __n2 > __set_algo_cut_off) 3248 return __parallel_set_op(std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __first2, __last2, __result, 3249 __comp, [](_DifferenceType __n, _DifferenceType) { return __n; }, 3250 [](_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3251 _ForwardIterator2 __last2, _Tp* __result, _Compare __comp) { 3252 return __pstl::__utils::__set_difference_construct( 3253 __first1, __last1, __first2, __last2, __result, __comp, 3254 __BrickCopyConstruct<_IsVector>()); 3255 }, 3256 __is_vector); 3257 3258 // use serial algorithm 3259 return std::set_difference(__first1, __last1, __first2, __last2, __result, __comp); 3260} 3261 3262//------------------------------------------------------------------------ 3263// set_symmetric_difference 3264//------------------------------------------------------------------------ 3265 3266template <class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, class _Compare> 3267_OutputIterator 3268__brick_set_symmetric_difference(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3269 _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 3270 /*__is_vector=*/std::false_type) noexcept 3271{ 3272 return std::set_symmetric_difference(__first1, __last1, __first2, __last2, __result, __comp); 3273} 3274 3275template <class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, class _Compare> 3276_OutputIterator 3277__brick_set_symmetric_difference(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3278 _ForwardIterator2 __last2, _OutputIterator __result, _Compare __comp, 3279 /*__is_vector=*/std::true_type) noexcept 3280{ 3281 _PSTL_PRAGMA_MESSAGE("Vectorized algorithm unimplemented, redirected to serial"); 3282 return std::set_symmetric_difference(__first1, __last1, __first2, __last2, __result, __comp); 3283} 3284 3285template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 3286 class _Compare, class _IsVector> 3287_OutputIterator 3288__pattern_set_symmetric_difference(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3289 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _OutputIterator __result, 3290 _Compare __comp, _IsVector __is_vector, /*is_parallel=*/std::false_type) noexcept 3291{ 3292 return __internal::__brick_set_symmetric_difference(__first1, __last1, __first2, __last2, __result, __comp, 3293 __is_vector); 3294} 3295 3296template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _OutputIterator, 3297 class _Compare, class _IsVector> 3298_OutputIterator 3299__pattern_set_symmetric_difference(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3300 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _OutputIterator __result, 3301 _Compare __comp, _IsVector __is_vector, /*is_parallel=*/std::true_type) 3302{ 3303 3304 const auto __n1 = __last1 - __first1; 3305 const auto __n2 = __last2 - __first2; 3306 3307 // use serial algorithm 3308 if (__n1 + __n2 <= __set_algo_cut_off) 3309 return std::set_symmetric_difference(__first1, __last1, __first2, __last2, __result, __comp); 3310 3311 typedef typename std::iterator_traits<_OutputIterator>::value_type _Tp; 3312 return __internal::__parallel_set_union_op( 3313 std::forward<_ExecutionPolicy>(__exec), __first1, __last1, __first2, __last2, __result, __comp, 3314 [](_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _ForwardIterator2 __last2, 3315 _Tp* __result, _Compare __comp) { 3316 return __pstl::__utils::__set_symmetric_difference_construct(__first1, __last1, __first2, __last2, __result, 3317 __comp, __BrickCopyConstruct<_IsVector>()); 3318 }, 3319 __is_vector); 3320} 3321 3322//------------------------------------------------------------------------ 3323// is_heap_until 3324//------------------------------------------------------------------------ 3325 3326template <class _RandomAccessIterator, class _Compare> 3327_RandomAccessIterator 3328__brick_is_heap_until(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 3329 /* __is_vector = */ std::false_type) noexcept 3330{ 3331 return std::is_heap_until(__first, __last, __comp); 3332} 3333 3334template <class _RandomAccessIterator, class _Compare> 3335_RandomAccessIterator 3336__brick_is_heap_until(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 3337 /* __is_vector = */ std::true_type) noexcept 3338{ 3339 if (__last - __first < 2) 3340 return __last; 3341 typedef typename std::iterator_traits<_RandomAccessIterator>::difference_type _SizeType; 3342 return __unseq_backend::__simd_first( 3343 __first, _SizeType(0), __last - __first, 3344 [&__comp](_RandomAccessIterator __it, _SizeType __i) { return __comp(__it[(__i - 1) / 2], __it[__i]); }); 3345} 3346 3347template <class _ExecutionPolicy, class _RandomAccessIterator, class _Compare, class _IsVector> 3348_RandomAccessIterator 3349__pattern_is_heap_until(_ExecutionPolicy&&, _RandomAccessIterator __first, _RandomAccessIterator __last, 3350 _Compare __comp, _IsVector __is_vector, /* is_parallel = */ std::false_type) noexcept 3351{ 3352 return __internal::__brick_is_heap_until(__first, __last, __comp, __is_vector); 3353} 3354 3355template <class _RandomAccessIterator, class _DifferenceType, class _Compare> 3356_RandomAccessIterator 3357__is_heap_until_local(_RandomAccessIterator __first, _DifferenceType __begin, _DifferenceType __end, _Compare __comp, 3358 /* __is_vector = */ std::false_type) noexcept 3359{ 3360 _DifferenceType __i = __begin; 3361 for (; __i < __end; ++__i) 3362 { 3363 if (__comp(__first[(__i - 1) / 2], __first[__i])) 3364 { 3365 break; 3366 } 3367 } 3368 return __first + __i; 3369} 3370 3371template <class _RandomAccessIterator, class _DifferenceType, class _Compare> 3372_RandomAccessIterator 3373__is_heap_until_local(_RandomAccessIterator __first, _DifferenceType __begin, _DifferenceType __end, _Compare __comp, 3374 /* __is_vector = */ std::true_type) noexcept 3375{ 3376 return __unseq_backend::__simd_first( 3377 __first, __begin, __end, 3378 [&__comp](_RandomAccessIterator __it, _DifferenceType __i) { return __comp(__it[(__i - 1) / 2], __it[__i]); }); 3379} 3380 3381template <class _ExecutionPolicy, class _RandomAccessIterator, class _Compare, class _IsVector> 3382_RandomAccessIterator 3383__pattern_is_heap_until(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, 3384 _Compare __comp, _IsVector __is_vector, /* is_parallel = */ std::true_type) noexcept 3385{ 3386 if (__last - __first < 2) 3387 return __last; 3388 3389 return __internal::__except_handler([&]() { 3390 return __parallel_find( 3391 std::forward<_ExecutionPolicy>(__exec), __first, __last, 3392 [__first, __comp, __is_vector](_RandomAccessIterator __i, _RandomAccessIterator __j) { 3393 return __internal::__is_heap_until_local(__first, __i - __first, __j - __first, __comp, __is_vector); 3394 }, 3395 std::less<typename std::iterator_traits<_RandomAccessIterator>::difference_type>(), /*is_first=*/true); 3396 }); 3397} 3398 3399//------------------------------------------------------------------------ 3400// min_element 3401//------------------------------------------------------------------------ 3402 3403template <typename _ForwardIterator, typename _Compare> 3404_ForwardIterator 3405__brick_min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp, 3406 /* __is_vector = */ std::false_type) noexcept 3407{ 3408 return std::min_element(__first, __last, __comp); 3409} 3410 3411template <typename _ForwardIterator, typename _Compare> 3412_ForwardIterator 3413__brick_min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp, 3414 /* __is_vector = */ std::true_type) noexcept 3415{ 3416#if _PSTL_UDR_PRESENT 3417 return __unseq_backend::__simd_min_element(__first, __last - __first, __comp); 3418#else 3419 return std::min_element(__first, __last, __comp); 3420#endif 3421} 3422 3423template <typename _ExecutionPolicy, typename _ForwardIterator, typename _Compare, typename _IsVector> 3424_ForwardIterator 3425__pattern_min_element(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Compare __comp, 3426 _IsVector __is_vector, /* is_parallel = */ std::false_type) noexcept 3427{ 3428 return __internal::__brick_min_element(__first, __last, __comp, __is_vector); 3429} 3430 3431template <typename _ExecutionPolicy, typename _RandomAccessIterator, typename _Compare, typename _IsVector> 3432_RandomAccessIterator 3433__pattern_min_element(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, 3434 _Compare __comp, _IsVector __is_vector, /* is_parallel = */ std::true_type) 3435{ 3436 if (__first == __last) 3437 return __last; 3438 3439 return __internal::__except_handler([&]() { 3440 return __par_backend::__parallel_reduce( 3441 std::forward<_ExecutionPolicy>(__exec), __first + 1, __last, __first, 3442 [=](_RandomAccessIterator __begin, _RandomAccessIterator __end, 3443 _RandomAccessIterator __init) -> _RandomAccessIterator { 3444 const _RandomAccessIterator subresult = 3445 __internal::__brick_min_element(__begin, __end, __comp, __is_vector); 3446 return __internal::__cmp_iterators_by_values(__init, subresult, __comp); 3447 }, 3448 [=](_RandomAccessIterator __it1, _RandomAccessIterator __it2) -> _RandomAccessIterator { 3449 return __internal::__cmp_iterators_by_values(__it1, __it2, __comp); 3450 }); 3451 }); 3452} 3453 3454//------------------------------------------------------------------------ 3455// minmax_element 3456//------------------------------------------------------------------------ 3457 3458template <typename _ForwardIterator, typename _Compare> 3459std::pair<_ForwardIterator, _ForwardIterator> 3460__brick_minmax_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp, 3461 /* __is_vector = */ std::false_type) noexcept 3462{ 3463 return std::minmax_element(__first, __last, __comp); 3464} 3465 3466template <typename _ForwardIterator, typename _Compare> 3467std::pair<_ForwardIterator, _ForwardIterator> 3468__brick_minmax_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp, 3469 /* __is_vector = */ std::true_type) noexcept 3470{ 3471#if _PSTL_UDR_PRESENT 3472 return __unseq_backend::__simd_minmax_element(__first, __last - __first, __comp); 3473#else 3474 return std::minmax_element(__first, __last, __comp); 3475#endif 3476} 3477 3478template <typename _ExecutionPolicy, typename _ForwardIterator, typename _Compare, typename _IsVector> 3479std::pair<_ForwardIterator, _ForwardIterator> 3480__pattern_minmax_element(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Compare __comp, 3481 _IsVector __is_vector, /* is_parallel = */ std::false_type) noexcept 3482{ 3483 return __internal::__brick_minmax_element(__first, __last, __comp, __is_vector); 3484} 3485 3486template <typename _ExecutionPolicy, typename _ForwardIterator, typename _Compare, typename _IsVector> 3487std::pair<_ForwardIterator, _ForwardIterator> 3488__pattern_minmax_element(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Compare __comp, 3489 _IsVector __is_vector, /* is_parallel = */ std::true_type) 3490{ 3491 if (__first == __last) 3492 return std::make_pair(__first, __first); 3493 3494 return __internal::__except_handler([&]() { 3495 typedef std::pair<_ForwardIterator, _ForwardIterator> _Result; 3496 3497 return __par_backend::__parallel_reduce( 3498 std::forward<_ExecutionPolicy>(__exec), __first + 1, __last, std::make_pair(__first, __first), 3499 [=](_ForwardIterator __begin, _ForwardIterator __end, _Result __init) -> _Result { 3500 const _Result __subresult = __internal::__brick_minmax_element(__begin, __end, __comp, __is_vector); 3501 return std::make_pair( 3502 __internal::__cmp_iterators_by_values(__subresult.first, __init.first, __comp), 3503 __internal::__cmp_iterators_by_values(__init.second, __subresult.second, std::not_fn(__comp))); 3504 }, 3505 [=](_Result __p1, _Result __p2) -> _Result { 3506 return std::make_pair( 3507 __internal::__cmp_iterators_by_values(__p1.first, __p2.first, __comp), 3508 __internal::__cmp_iterators_by_values(__p2.second, __p1.second, std::not_fn(__comp))); 3509 }); 3510 }); 3511} 3512 3513//------------------------------------------------------------------------ 3514// mismatch 3515//------------------------------------------------------------------------ 3516template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 3517std::pair<_ForwardIterator1, _ForwardIterator2> 3518__mismatch_serial(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3519 _ForwardIterator2 __last2, _BinaryPredicate __pred) 3520{ 3521#if _PSTL_CPP14_2RANGE_MISMATCH_EQUAL_PRESENT 3522 return std::mismatch(__first1, __last1, __first2, __last2, __pred); 3523#else 3524 for (; __first1 != __last1 && __first2 != __last2 && __pred(*__first1, *__first2); ++__first1, ++__first2) 3525 { 3526 } 3527 return std::make_pair(__first1, __first2); 3528#endif 3529} 3530 3531template <class _ForwardIterator1, class _ForwardIterator2, class _Predicate> 3532std::pair<_ForwardIterator1, _ForwardIterator2> 3533__brick_mismatch(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3534 _ForwardIterator2 __last2, _Predicate __pred, /* __is_vector = */ std::false_type) noexcept 3535{ 3536 return __mismatch_serial(__first1, __last1, __first2, __last2, __pred); 3537} 3538 3539template <class _ForwardIterator1, class _ForwardIterator2, class _Predicate> 3540std::pair<_ForwardIterator1, _ForwardIterator2> 3541__brick_mismatch(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3542 _ForwardIterator2 __last2, _Predicate __pred, /* __is_vector = */ std::true_type) noexcept 3543{ 3544 auto __n = std::min(__last1 - __first1, __last2 - __first2); 3545 return __unseq_backend::__simd_first(__first1, __n, __first2, std::not_fn(__pred)); 3546} 3547 3548template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Predicate, class _IsVector> 3549std::pair<_ForwardIterator1, _ForwardIterator2> 3550__pattern_mismatch(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3551 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _Predicate __pred, _IsVector __is_vector, 3552 /* is_parallel = */ std::false_type) noexcept 3553{ 3554 return __internal::__brick_mismatch(__first1, __last1, __first2, __last2, __pred, __is_vector); 3555} 3556 3557template <class _ExecutionPolicy, class _RandomAccessIterator1, class _RandomAccessIterator2, class _Predicate, 3558 class _IsVector> 3559std::pair<_RandomAccessIterator1, _RandomAccessIterator2> 3560__pattern_mismatch(_ExecutionPolicy&& __exec, _RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 3561 _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _Predicate __pred, 3562 _IsVector __is_vector, /* is_parallel = */ std::true_type) noexcept 3563{ 3564 return __internal::__except_handler([&]() { 3565 auto __n = std::min(__last1 - __first1, __last2 - __first2); 3566 auto __result = __internal::__parallel_find( 3567 std::forward<_ExecutionPolicy>(__exec), __first1, __first1 + __n, 3568 [__first1, __first2, __pred, __is_vector](_RandomAccessIterator1 __i, _RandomAccessIterator1 __j) { 3569 return __internal::__brick_mismatch(__i, __j, __first2 + (__i - __first1), __first2 + (__j - __first1), 3570 __pred, __is_vector) 3571 .first; 3572 }, 3573 std::less<typename std::iterator_traits<_RandomAccessIterator1>::difference_type>(), /*is_first=*/true); 3574 return std::make_pair(__result, __first2 + (__result - __first1)); 3575 }); 3576} 3577 3578//------------------------------------------------------------------------ 3579// lexicographical_compare 3580//------------------------------------------------------------------------ 3581 3582template <class _ForwardIterator1, class _ForwardIterator2, class _Compare> 3583bool 3584__brick_lexicographical_compare(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3585 _ForwardIterator2 __last2, _Compare __comp, 3586 /* __is_vector = */ std::false_type) noexcept 3587{ 3588 return std::lexicographical_compare(__first1, __last1, __first2, __last2, __comp); 3589} 3590 3591template <class _ForwardIterator1, class _ForwardIterator2, class _Compare> 3592bool 3593__brick_lexicographical_compare(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, 3594 _ForwardIterator2 __last2, _Compare __comp, /* __is_vector = */ std::true_type) noexcept 3595{ 3596 if (__first2 == __last2) 3597 { // if second sequence is empty 3598 return false; 3599 } 3600 else if (__first1 == __last1) 3601 { // if first sequence is empty 3602 return true; 3603 } 3604 else 3605 { 3606 typedef typename std::iterator_traits<_ForwardIterator1>::reference ref_type1; 3607 typedef typename std::iterator_traits<_ForwardIterator2>::reference ref_type2; 3608 --__last1; 3609 --__last2; 3610 auto __n = std::min(__last1 - __first1, __last2 - __first2); 3611 std::pair<_ForwardIterator1, _ForwardIterator2> __result = __unseq_backend::__simd_first( 3612 __first1, __n, __first2, [__comp](const ref_type1 __x, const ref_type2 __y) mutable { 3613 return __comp(__x, __y) || __comp(__y, __x); 3614 }); 3615 3616 if (__result.first == __last1 && __result.second != __last2) 3617 { // if first sequence shorter than second 3618 return !__comp(*__result.second, *__result.first); 3619 } 3620 else 3621 { // if second sequence shorter than first or both have the same number of elements 3622 return __comp(*__result.first, *__result.second); 3623 } 3624 } 3625} 3626 3627template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Compare, class _IsVector> 3628bool 3629__pattern_lexicographical_compare(_ExecutionPolicy&&, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3630 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _Compare __comp, 3631 _IsVector __is_vector, /* is_parallel = */ std::false_type) noexcept 3632{ 3633 return __internal::__brick_lexicographical_compare(__first1, __last1, __first2, __last2, __comp, __is_vector); 3634} 3635 3636template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Compare, class _IsVector> 3637bool 3638__pattern_lexicographical_compare(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, 3639 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _Compare __comp, 3640 _IsVector __is_vector, /* is_parallel = */ std::true_type) noexcept 3641{ 3642 if (__first2 == __last2) 3643 { // if second sequence is empty 3644 return false; 3645 } 3646 else if (__first1 == __last1) 3647 { // if first sequence is empty 3648 return true; 3649 } 3650 else 3651 { 3652 typedef typename std::iterator_traits<_ForwardIterator1>::reference _RefType1; 3653 typedef typename std::iterator_traits<_ForwardIterator2>::reference _RefType2; 3654 --__last1; 3655 --__last2; 3656 auto __n = std::min(__last1 - __first1, __last2 - __first2); 3657 auto __result = __internal::__parallel_find( 3658 std::forward<_ExecutionPolicy>(__exec), __first1, __first1 + __n, 3659 [__first1, __first2, &__comp, __is_vector](_ForwardIterator1 __i, _ForwardIterator1 __j) { 3660 return __internal::__brick_mismatch(__i, __j, __first2 + (__i - __first1), __first2 + (__j - __first1), 3661 [&__comp](const _RefType1 __x, const _RefType2 __y) { 3662 return !__comp(__x, __y) && !__comp(__y, __x); 3663 }, 3664 __is_vector) 3665 .first; 3666 }, 3667 std::less<typename std::iterator_traits<_ForwardIterator1>::difference_type>(), /*is_first=*/true); 3668 3669 if (__result == __last1 && __first2 + (__result - __first1) != __last2) 3670 { // if first sequence shorter than second 3671 return !__comp(*(__first2 + (__result - __first1)), *__result); 3672 } 3673 else 3674 { // if second sequence shorter than first or both have the same number of elements 3675 return __comp(*__result, *(__first2 + (__result - __first1))); 3676 } 3677 } 3678} 3679 3680} // namespace __internal 3681} // namespace __pstl 3682 3683#endif /* _PSTL_ALGORITHM_IMPL_H */ 3684