1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include <algorithm> 10 #include <bit> 11 12 _LIBCPP_BEGIN_NAMESPACE_STD 13 14 template <class Comp, class RandomAccessIterator> 15 void __sort(RandomAccessIterator first, RandomAccessIterator last, Comp comp) { 16 auto depth_limit = 2 * std::__bit_log2(static_cast<size_t>(last - first)); 17 18 // Only use bitset partitioning for arithmetic types. We should also check 19 // that the default comparator is in use so that we are sure that there are no 20 // branches in the comparator. 21 std::__introsort<_ClassicAlgPolicy, 22 ranges::less, 23 RandomAccessIterator, 24 __use_branchless_sort<ranges::less, RandomAccessIterator>>(first, last, ranges::less{}, depth_limit); 25 } 26 27 // clang-format off 28 template void __sort<__less<char>&, char*>(char*, char*, __less<char>&); 29 #if _LIBCPP_HAS_WIDE_CHARACTERS 30 template void __sort<__less<wchar_t>&, wchar_t*>(wchar_t*, wchar_t*, __less<wchar_t>&); 31 #endif 32 template void __sort<__less<signed char>&, signed char*>(signed char*, signed char*, __less<signed char>&); 33 template void __sort<__less<unsigned char>&, unsigned char*>(unsigned char*, unsigned char*, __less<unsigned char>&); 34 template void __sort<__less<short>&, short*>(short*, short*, __less<short>&); 35 template void __sort<__less<unsigned short>&, unsigned short*>(unsigned short*, unsigned short*, __less<unsigned short>&); 36 template void __sort<__less<int>&, int*>(int*, int*, __less<int>&); 37 template void __sort<__less<unsigned>&, unsigned*>(unsigned*, unsigned*, __less<unsigned>&); 38 template void __sort<__less<long>&, long*>(long*, long*, __less<long>&); 39 template void __sort<__less<unsigned long>&, unsigned long*>(unsigned long*, unsigned long*, __less<unsigned long>&); 40 template void __sort<__less<long long>&, long long*>(long long*, long long*, __less<long long>&); 41 template void __sort<__less<unsigned long long>&, unsigned long long*>(unsigned long long*, unsigned long long*, __less<unsigned long long>&); 42 template void __sort<__less<float>&, float*>(float*, float*, __less<float>&); 43 template void __sort<__less<double>&, double*>(double*, double*, __less<double>&); 44 template void __sort<__less<long double>&, long double*>(long double*, long double*, __less<long double>&); 45 // clang-format on 46 47 _LIBCPP_END_NAMESPACE_STD 48