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| 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 | // TODO: __builtin_popcountg is available since Clang 19 and GCC 14. When support for older versions is dropped, we can |
| 10 | // refactor this code to exclusively use __builtin_popcountg. |
| 11 | |
| 12 | #ifndef _LIBCPP___CXX03___BIT_POPCOUNT_H |
| 13 | #define _LIBCPP___CXX03___BIT_POPCOUNT_H |
| 14 | |
| 15 | #include <__cxx03/__bit/rotate.h> |
| 16 | #include <__cxx03/__config> |
| 17 | #include <__cxx03/limits> |
| 18 | |
| 19 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 20 | # pragma GCC system_header |
| 21 | #endif |
| 22 | |
| 23 | _LIBCPP_PUSH_MACROS |
| 24 | #include <__cxx03/__undef_macros> |
| 25 | |
| 26 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 27 | |
| 28 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_popcount(unsigned __x) _NOEXCEPT { return __builtin_popcount(__x); } |
| 29 | |
| 30 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_popcount(unsigned long __x) _NOEXCEPT { return __builtin_popcountl(__x); } |
| 31 | |
| 32 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_popcount(unsigned long long __x) _NOEXCEPT { |
| 33 | return __builtin_popcountll(__x); |
| 34 | } |
| 35 | |
| 36 | _LIBCPP_END_NAMESPACE_STD |
| 37 | |
| 38 | _LIBCPP_POP_MACROS |
| 39 | |
| 40 | #endif // _LIBCPP___CXX03___BIT_POPCOUNT_H |
| 41 |
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