//===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef _LIBCPP___BIT_ROTATE_H #define _LIBCPP___BIT_ROTATE_H #include <__concepts/arithmetic.h> #include <__config> #include <__type_traits/is_unsigned_integer.h> #include <limits> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # pragma GCC system_header #endif _LIBCPP_BEGIN_NAMESPACE_STD template<class _Tp> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Tp __rotr(_Tp __t, unsigned int __cnt) _NOEXCEPT { static_assert(__libcpp_is_unsigned_integer<_Tp>::value, "__rotr requires an unsigned integer type"); const unsigned int __dig = numeric_limits<_Tp>::digits; if ((__cnt % __dig) == 0) return __t; return (__t >> (__cnt % __dig)) | (__t << (__dig - (__cnt % __dig))); } #if _LIBCPP_STD_VER >= 20 template <__libcpp_unsigned_integer _Tp> _LIBCPP_HIDE_FROM_ABI constexpr _Tp rotl(_Tp __t, unsigned int __cnt) noexcept { const unsigned int __dig = numeric_limits<_Tp>::digits; if ((__cnt % __dig) == 0) return __t; return (__t << (__cnt % __dig)) | (__t >> (__dig - (__cnt % __dig))); } template <__libcpp_unsigned_integer _Tp> _LIBCPP_HIDE_FROM_ABI constexpr _Tp rotr(_Tp __t, unsigned int __cnt) noexcept { return std::__rotr(__t, __cnt); } #endif // _LIBCPP_STD_VER >= 20 _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP___BIT_ROTATE_H