bit.hpp 文件参考

位操作函数 更多...

#include "NeForce/core/typeinfo/types.hpp"

bit.hpp 的引用(Include)关系图:

浏览该文件的源代码.

函数
constexpr int	neforce::popcount64 (uint64_t x) noexcept
	计算64位整数中1的个数
constexpr int	neforce::clz64 (uint64_t x) noexcept
	计算64位整数前导零的个数
constexpr int	neforce::popcount32 (const uint32_t x) noexcept
	计算32位整数中1的个数
constexpr int	neforce::clz32 (uint32_t x) noexcept
	计算32位整数前导零的个数
constexpr int	neforce::popcount (const uintptr_t x) noexcept
	计算整数中1的个数
constexpr int	neforce::countl_zero (const uintptr_t x) noexcept
	计算整数前导零的个数
constexpr int	neforce::countl_one (const uintptr_t x) noexcept
	计算整数前导1的个数
constexpr int	neforce::countr_zero (const uintptr_t x) noexcept
	计算整数尾随零的个数
constexpr int	neforce::countr_one (const uintptr_t x) noexcept
	计算整数尾随1的个数
constexpr int	neforce::lowest_set_bit_pos (const intptr_t x) noexcept
	获取最低设置位的位置，从0开始
constexpr int	neforce::highest_set_bit_pos (const intptr_t x) noexcept
	获取最高设置位的位置
constexpr bool	neforce::parity32 (uint32_t x) noexcept
	计算32位整数的奇偶性
constexpr bool	neforce::parity64 (uint64_t x) noexcept
	计算64位整数的奇偶性
constexpr bool	neforce::parity (const uintptr_t x) noexcept
	计算整数的奇偶性
constexpr int	neforce::bit_width (const uintptr_t x) noexcept
	计算表示整数所需的最小位宽
constexpr uintptr_t	neforce::bit_floor (const uintptr_t x) noexcept
	获取不大于x的最大2的幂
constexpr uint64_t	neforce::bit_ceil (const uintptr_t x) noexcept
	获取不小于x的最小2的幂
constexpr bool	neforce::has_single_bit (const uintptr_t x) noexcept
	检查整数是否为2的幂
constexpr uint32_t	neforce::rotate_l32 (const uint32_t x, const int s) noexcept
	32位整数循环左移
constexpr uint32_t	neforce::rotate_r32 (const uint32_t x, const int s) noexcept
	32位整数循环右移
constexpr uint64_t	neforce::rotate_l64 (const uint64_t x, const int s) noexcept
	64位整数循环左移
constexpr uint64_t	neforce::rotate_r64 (const uint64_t x, const int s) noexcept
	64位整数循环右移
constexpr uintptr_t	neforce::rotate_l (const uintptr_t x, const int s) noexcept
	整数循环左移
constexpr uintptr_t	neforce::rotate_r (const uintptr_t x, const int s) noexcept
	整数循环右移
constexpr uintptr_t	neforce::bit_extract (const uintptr_t x, const int pos, const int len) noexcept
	从整数中提取指定位段
constexpr uintptr_t	neforce::bit_insert (const uintptr_t x, const uintptr_t bits, const int pos, const int len) noexcept
	向整数中插入指定位段
constexpr uint32_t	neforce::reverse_bits32 (uint32_t x) noexcept
	反转32位整数的位顺序
constexpr uint64_t	neforce::reverse_bits64 (uint64_t x) noexcept
	反转64位整数的位顺序
constexpr uintptr_t	neforce::reverse_bits (const uintptr_t x) noexcept
	反转整数的位顺序
constexpr uintptr_t	neforce::mask_from_to (const int from, const int to) noexcept
	生成从from到to的位掩码

详细描述

位操作函数

此文件提供了各种位操作函数的实现，包括位计数、前导零计数、位旋转、位反转等。

在文件 bit.hpp 中定义.