derek.holloway
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102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===---------------------------------------------------------------------===//
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#ifndef _LIBCPP_BIT
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#define _LIBCPP_BIT
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/*
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bit synopsis
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namespace std {
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// [bit.cast], bit_cast
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template<class To, class From>
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constexpr To bit_cast(const From& from) noexcept; // C++20
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// [bit.byteswap], byteswap
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template<class T>
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constexpr T byteswap(T value) noexcept; // C++23
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// [bit.pow.two], integral powers of 2
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template <class T>
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constexpr bool has_single_bit(T x) noexcept; // C++20
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template <class T>
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constexpr T bit_ceil(T x); // C++20
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template <class T>
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constexpr T bit_floor(T x) noexcept; // C++20
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template <class T>
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constexpr int bit_width(T x) noexcept; // C++20
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// [bit.rotate], rotating
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template<class T>
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constexpr T rotl(T x, int s) noexcept; // C++20
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template<class T>
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constexpr T rotr(T x, int s) noexcept; // C++20
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// [bit.count], counting
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template<class T>
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constexpr int countl_zero(T x) noexcept; // C++20
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template<class T>
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constexpr int countl_one(T x) noexcept; // C++20
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template<class T>
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constexpr int countr_zero(T x) noexcept; // C++20
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template<class T>
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constexpr int countr_one(T x) noexcept; // C++20
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template<class T>
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constexpr int popcount(T x) noexcept; // C++20
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// [bit.endian], endian
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enum class endian {
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little = see below, // C++20
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big = see below, // C++20
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native = see below // C++20
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};
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} // namespace std
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*/
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#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
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# include <__cxx03/__config>
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#else
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# include <__config>
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# if _LIBCPP_STD_VER >= 20
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# include <__bit/bit_cast.h>
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# include <__bit/bit_ceil.h>
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# include <__bit/bit_floor.h>
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# include <__bit/bit_log2.h>
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# include <__bit/bit_width.h>
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# include <__bit/countl.h>
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# include <__bit/countr.h>
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# include <__bit/endian.h>
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# include <__bit/has_single_bit.h>
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# include <__bit/popcount.h>
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# include <__bit/rotate.h>
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# endif
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# if _LIBCPP_STD_VER >= 23
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# include <__bit/byteswap.h>
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# endif
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# include <version>
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# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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# endif
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# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
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# include <cstdlib>
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# include <iosfwd>
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# include <limits>
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# include <type_traits>
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# endif
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#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
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#endif // _LIBCPP_BIT
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