Word128 Struct Reference

an unsigned integer of 128 bits, as two words of 64 More...

#include <PBeFS/astar/SlidingTile.h>

Public Member Functions
constexpr	Word128 (void) noexcept=default
constexpr	Word128 (std::uint64_t l) noexcept
	the integer of value l
constexpr	Word128 (std::uint64_t l, std::uint64_t h) noexcept
	the integer of the words l and h
constexpr	operator std::uint64_t (void) const noexcept
	the bits 0 to 63
Word128 &	operator|= (Word128 b) noexcept

Public Attributes
std::uint64_t	lo = 0
	the bits 0 to 63
std::uint64_t	hi = 0
	the bits 64 to 127

Friends
constexpr bool	operator== (const Word128 &a, const Word128 &b) noexcept=default
constexpr Word128	operator& (Word128 a, Word128 b) noexcept
constexpr Word128	operator| (Word128 a, Word128 b) noexcept
constexpr Word128	operator^ (Word128 a, Word128 b) noexcept
constexpr Word128	operator~ (Word128 a) noexcept
constexpr Word128	operator<< (Word128 a, int n) noexcept
	the shift to the left by n bits, \( 0 \leq n < 128 \)
constexpr Word128	operator>> (Word128 a, int n) noexcept
	the shift to the right by n bits, \( 0 \leq n < 128 \)
constexpr int	countr_zero (Word128 a) noexcept
	the number of trailing zero bits, 128 if a is 0

Detailed Description

an unsigned integer of 128 bits, as two words of 64

It has the operations on bits that a packed board needs (and, or, exclusive or, not, the shifts and the count of the trailing zeros), written on two words so that they are the same with every compiler, none of which has to offer an integer of 128 bits; it is trivially copyable, and two of them are equal if their words are.

Constructor & Destructor Documentation

Word128() [1/3]

Word128 ( void )

constexprdefaultnoexcept

Word128() [2/3]

Word128 ( std::uint64_t l )

inlineconstexprnoexcept

the integer of value l

Word128() [3/3]

Word128 ( std::uint64_t l, std::uint64_t h )

inlineconstexprnoexcept

the integer of the words l and h

Member Function Documentation

operator std::uint64_t()

operator std::uint64_t ( void ) const

inlineexplicitconstexprnoexcept

the bits 0 to 63

operator|=()

Word128 & operator|= ( Word128 b )

inlinenoexcept

Friends And Related Symbol Documentation

countr_zero

int countr_zero ( Word128 a )

friend

the number of trailing zero bits, 128 if a is 0

operator&

Word128 operator& ( Word128 a, Word128 b )

friend

operator<<

Word128 operator<< ( Word128 a, int n )

friend

the shift to the left by n bits, \( 0 \leq n < 128 \)

operator==

bool operator== ( const Word128 & a, const Word128 & b )

friend

operator>>

Word128 operator>> ( Word128 a, int n )

friend

the shift to the right by n bits, \( 0 \leq n < 128 \)

operator^

Word128 operator^ ( Word128 a, Word128 b )

friend

operator|

Word128 operator| ( Word128 a, Word128 b )

friend

operator~

Word128 operator~ ( Word128 a )

friend

Member Data Documentation

hi

std::uint64_t hi = 0

the bits 64 to 127

lo

std::uint64_t lo = 0

the bits 0 to 63

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The documentation for this struct was generated from the following file:

• PBeFS/astar/SlidingTile.h