High precision numerical type, implementing Q64.64 fixed precision. More...

#include "int64x64-128.h"

Collaboration diagram for ns3::int64x64_t:

Public Types
enum	impl_type { int128_impl, cairo_impl, ld_impl, int128_impl, cairo_impl, ld_impl, int128_impl, cairo_impl, ld_impl }
	Type tag for the underlying implementation. More...

enum	impl_type { int128_impl, cairo_impl, ld_impl, int128_impl, cairo_impl, ld_impl, int128_impl, cairo_impl, ld_impl }
	Type tag for the underlying implementation. More...

enum	impl_type { int128_impl, cairo_impl, ld_impl, int128_impl, cairo_impl, ld_impl, int128_impl, cairo_impl, ld_impl }
	Type tag for the underlying implementation. More...

Public Member Functions

int64x64_t ()

Default constructor. More...

int64x64_t ()

Default constructor. More...

int64x64_t ()

Default constructor. More...

int64x64_t (const int64_t hi, const uint64_t lo)

Construct from explicit high and low values. More...

int64x64_t (const int64_t hi, const uint64_t lo)

Construct from explicit high and low values. More...

int64x64_t (const int64x64_t &o)

Copy constructor. More...

int64x64_t (const int64x64_t &o)

Copy constructor. More...

int64x64_t (const int64x64_t &o)

Copy constructor. More...

int64x64_t (int64_t hi, uint64_t lo)

Construct from explicit high and low values. More...

double GetDouble (void) const

Get this value as a double. More...

double GetDouble (void) const

Get this value as a double. More...

double GetDouble (void) const

Get this value as a double. More...

int64_t GetHigh (void) const

Get the integer portion. More...

int64_t GetHigh (void) const

Get the integer portion. More...

int64_t GetHigh (void) const

Get the integer portion. More...

int64_t GetInt (void) const

Truncate to an integer. More...

int64_t GetInt (void) const

Truncate to an integer. More...

int64_t GetInt (void) const

Truncate to an integer. More...

uint64_t GetLow (void) const

Get the fractional portion of this value, unscaled. More...

uint64_t GetLow (void) const

Get the fractional portion of this value, unscaled. More...

uint64_t GetLow (void) const

Get the fractional portion of this value, unscaled. More...

void MulByInvert (const int64x64_t &o)

Multiply this value by a Q0.128 value, presumably representing an inverse, completing a division operation. More...

void MulByInvert (const int64x64_t &o)

Multiply this value by a Q0.128 value, presumably representing an inverse, completing a division operation. More...

void MulByInvert (const int64x64_t &o)

Multiply this value by a Q0.128 value, presumably representing an inverse, completing a division operation. More...

int64x64_t & operator= (const int64x64_t &o)

Assignment. More...

int64x64_t & operator= (const int64x64_t &o)

Assignment. More...

int64x64_t & operator= (const int64x64_t &o)

Assignment. More...

int64_t Round (void) const

Round to the nearest int. More...

int64_t Round (void) const

Round to the nearest int. More...

int64_t Round (void) const

Round to the nearest int. More...

Construct from a floating point value.

Parameters

[in] value Floating value to represent.

int64x64_t (const double value)

int64x64_t (const long double value)

Construct from an integral type.

Parameters

[in] v Integer value to represent.

int64x64_t (const int v)

int64x64_t (const long int v)

int64x64_t (const long long int v)

int64x64_t (const unsigned int v)

int64x64_t (const unsigned long int v)

int64x64_t (const unsigned long long int v)

int64x64_t (const double value)

Construct from a floating point value. More...

int64x64_t (const long double value)

Construct from a floating point value. More...

int64x64_t (const int v)

Construct from an integral type. More...

int64x64_t (const long int v)

Construct from an integral type. More...

int64x64_t (const long long int v)

Construct from an integral type. More...

int64x64_t (const unsigned int v)

Construct from an integral type. More...

int64x64_t (const unsigned long int v)

Construct from an integral type. More...

int64x64_t (const unsigned long long int v)

Construct from an integral type. More...

int64x64_t (double v)

Construct from a floating point value. More...

int64x64_t (long double v)

Construct from a floating point value. More...

int64x64_t (int v)

Construct from an integral type. More...

int64x64_t (long int v)

Construct from an integral type. More...

int64x64_t (long long int v)

Construct from an integral type. More...

int64x64_t (unsigned int v)

Construct from an integral type. More...

int64x64_t (unsigned long int v)

Construct from an integral type. More...

int64x64_t (unsigned long long int v)

Construct from an integral type. More...

Static Public Member Functions
static int64x64_t	Invert (const uint64_t v)
	Compute the inverse of an integer value. More...

static int64x64_t	Invert (const uint64_t v)
	Compute the inverse of an integer value. More...

static int64x64_t	Invert (uint64_t v)
	Compute the inverse of an integer value. More...

Static Public Attributes
static enum impl_type	implementation = int128_impl
	Type tag for this implementation. More...

Private Member Functions
	int64x64_t (const int128_t v)
	Construct from an integral type. More...

void	Div (const int64x64_t &o)
	Implement `/=`. More...

void	Div (const int64x64_t &o)
	Implement `/=`. More...

std::pair< int64_t, uint64_t >	GetHighLow (void) const
	Get the high and low portions of this value. More...

void	Mul (const int64x64_t &o)
	Implement `*=`. More...

void	Mul (const int64x64_t &o)
	Implement `*=`. More...

Static Private Member Functions
static cairo_uint128_t	Udiv (const cairo_uint128_t a, const cairo_uint128_t b)
	Unsigned division of Q64.64 values. More...

static uint128_t	Udiv (const uint128_t a, const uint128_t b)
	Unsigned division of Q64.64 values. More...

static cairo_uint128_t	Umul (const cairo_uint128_t a, const cairo_uint128_t b)
	Unsigned multiplication of Q64.64 values. More...

static uint128_t	Umul (const uint128_t a, const uint128_t b)
	Unsigned multiplication of Q64.64 values. More...

static cairo_uint128_t	UmulByInvert (const cairo_uint128_t a, const cairo_uint128_t b)
	Unsigned multiplication of Q64.64 and Q0.128 values. More...

static uint128_t	UmulByInvert (const uint128_t a, const uint128_t b)
	Unsigned multiplication of Q64.64 and Q0.128 values. More...

Private Attributes
int128_t	_v
	The Q64.64 value. More...

cairo_int128_t	_v
	The Q64.64 value. More...

long double	_v
	The Q64.64 value. More...

Static Private Attributes
static const uint128_t	HP128_MASK_HI_BIT = (((int128_t)1) << 127)
	uint128_t high bit (sign bit). More...

static const uint64_t	HP_MASK_HI = ~HP_MASK_LO
	Mask for sign + integer part. More...

static const uint64_t	HP_MASK_LO = 0xffffffffffffffffULL
	Mask for fraction part. More...

static const uint64_t	HPCAIRO_MASK_HI_BIT = (((uint64_t)1) << 63)
	High bit of fractional part. More...

Friends
Arithmetic Operators
Arithmetic operators for int64x64_t.
bool	operator== (const int64x64_t &lhs, const int64x64_t &rhs)
	Arithmetic operator. More...

bool	operator< (const int64x64_t &lhs, const int64x64_t &rhs)
	Less than operator. More...

bool	operator> (const int64x64_t &lhs, const int64x64_t &rhs)
	Greater operator. More...

int64x64_t &	operator+= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound addition operator. More...

int64x64_t &	operator-= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound subtraction operator. More...

int64x64_t &	operator*= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound multiplication operator. More...

int64x64_t &	operator/= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound division operator. More...

bool	operator== (const int64x64_t &lhs, const int64x64_t &rhs)
	Arithmetic operator. More...

bool	operator< (const int64x64_t &lhs, const int64x64_t &rhs)
	Less than operator. More...

bool	operator> (const int64x64_t &lhs, const int64x64_t &rhs)
	Greater operator. More...

int64x64_t &	operator+= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound addition operator. More...

int64x64_t &	operator-= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound subtraction operator. More...

int64x64_t &	operator*= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound multiplication operator. More...

int64x64_t &	operator/= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound division operator. More...

bool	operator== (const int64x64_t &lhs, const int64x64_t &rhs)
	Arithmetic operator. More...

bool	operator< (const int64x64_t &lhs, const int64x64_t &rhs)
	Less than operator. More...

bool	operator> (const int64x64_t &lhs, const int64x64_t &rhs)
	Greater operator. More...

int64x64_t &	operator+= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound addition operator. More...

int64x64_t &	operator-= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound subtraction operator. More...

int64x64_t &	operator*= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound multiplication operator. More...

int64x64_t &	operator/= (int64x64_t &lhs, const int64x64_t &rhs)
	Compound division operator. More...

Unary Operators
Unary operators for int64x64_t.
int64x64_t	operator- (const int64x64_t &lhs)
	Unary operator. More...

int64x64_t	operator! (const int64x64_t &lhs)
	Logical not operator. More...

int64x64_t	operator- (const int64x64_t &lhs)
	Unary operator. More...

int64x64_t	operator! (const int64x64_t &lhs)
	Logical not operator. More...

int64x64_t	operator- (const int64x64_t &lhs)
	Unary operator. More...

int64x64_t	operator! (const int64x64_t &lhs)
	Logical not operator. More...

Detailed Description

High precision numerical type, implementing Q64.64 fixed precision.

Internal:: The implementation documented here is based on native 128-bit integers.

Internal:: The implementation documented here uses cairo 128-bit integers.

Internal:: The implementation documented here uses native long double.

Definition at line 45 of file int64x64-128.h.

Member Enumeration Documentation

◆ impl_type [1/3]

enum ns3::int64x64_t::impl_type

Type tag for the underlying implementation.

A few testcases are are sensitive to implementation, specifically the double implementation. To handle this, we expose the underlying implementation type here.

Enumerator
int128_impl	Native `int128_t` implementation. Native int128_t implementation.
cairo_impl	Cairo wideint implementation. cairo wideint implementation
ld_impl	`long double` implementation. long double implementation
int128_impl	Native `int128_t` implementation. Native int128_t implementation.
cairo_impl	Cairo wideint implementation. cairo wideint implementation
ld_impl	`long double` implementation. long double implementation
int128_impl	Native `int128_t` implementation. Native int128_t implementation.
cairo_impl	Cairo wideint implementation. cairo wideint implementation
ld_impl	`long double` implementation. long double implementation

Definition at line 76 of file int64x64-128.h.

◆ impl_type [2/3]

enum ns3::int64x64_t::impl_type

Type tag for the underlying implementation.

A few testcases are sensitive to implementation, specifically the double implementation. To handle this, we expose the underlying implementation type here.

Enumerator
int128_impl	Native `int128_t` implementation. Native int128_t implementation.
cairo_impl	Cairo wideint implementation. cairo wideint implementation
ld_impl	`long double` implementation. long double implementation
int128_impl	Native `int128_t` implementation. Native int128_t implementation.
cairo_impl	Cairo wideint implementation. cairo wideint implementation
ld_impl	`long double` implementation. long double implementation
int128_impl	Native `int128_t` implementation. Native int128_t implementation.
cairo_impl	Cairo wideint implementation. cairo wideint implementation
ld_impl	`long double` implementation. long double implementation

Definition at line 68 of file int64x64-cairo.h.

◆ impl_type [3/3]

enum ns3::int64x64_t::impl_type

Type tag for the underlying implementation.

A few testcases are are sensitive to implementation, specifically the double implementation. To handle this, we expose the underlying implementation type here.

Enumerator
int128_impl	Native `int128_t` implementation. Native int128_t implementation.
cairo_impl	Cairo wideint implementation. cairo wideint implementation
ld_impl	`long double` implementation. long double implementation
int128_impl	Native `int128_t` implementation. Native int128_t implementation.
cairo_impl	Cairo wideint implementation. cairo wideint implementation
ld_impl	`long double` implementation. long double implementation
int128_impl	Native `int128_t` implementation. Native int128_t implementation.
cairo_impl	Cairo wideint implementation. cairo wideint implementation
ld_impl	`long double` implementation. long double implementation

Definition at line 67 of file int64x64-double.h.

Constructor & Destructor Documentation

◆ int64x64_t() [1/34]

ns3::int64x64_t::int64x64_t ( )

inline

Default constructor.

Definition at line 87 of file int64x64-128.h.

Referenced by Invert().

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◆ int64x64_t() [2/34]

ns3::int64x64_t::int64x64_t ( const double value )

inline

Definition at line 96 of file int64x64-128.h.

References _v.

◆ int64x64_t() [3/34]

ns3::int64x64_t::int64x64_t ( const long double value )

inline

Definition at line 101 of file int64x64-128.h.

References _v, and HP_MAX_64.

◆ int64x64_t() [4/34]

ns3::int64x64_t::int64x64_t ( const int v )

inline

Definition at line 137 of file int64x64-128.h.

References _v.

◆ int64x64_t() [5/34]

ns3::int64x64_t::int64x64_t ( const long int v )

inline

Definition at line 142 of file int64x64-128.h.

References _v.

◆ int64x64_t() [6/34]

ns3::int64x64_t::int64x64_t ( const long long int v )

inline

Definition at line 147 of file int64x64-128.h.

References _v.

◆ int64x64_t() [7/34]

ns3::int64x64_t::int64x64_t ( const unsigned int v )

inline

Definition at line 152 of file int64x64-128.h.

References _v.

◆ int64x64_t() [8/34]

ns3::int64x64_t::int64x64_t ( const unsigned long int v )

inline

Definition at line 157 of file int64x64-128.h.

References _v.

◆ int64x64_t() [9/34]

ns3::int64x64_t::int64x64_t ( const unsigned long long int v )

inline

Definition at line 162 of file int64x64-128.h.

References _v.

◆ int64x64_t() [10/34]

ns3::int64x64_t::int64x64_t	(	const int64_t	hi,
		const uint64_t	lo
	)

inlineexplicit

Construct from explicit high and low values.

Parameters

[in]	hi	Integer portion.
[in]	lo	Fractional portion, already scaled to HP_MAX_64.

Definition at line 175 of file int64x64-128.h.

References _v.

◆ int64x64_t() [11/34]

ns3::int64x64_t::int64x64_t ( const int64x64_t & o )

inline

Copy constructor.

Parameters

[in] o Value to copy.

Definition at line 186 of file int64x64-128.h.

◆ int64x64_t() [12/34]

ns3::int64x64_t::int64x64_t ( const int128_t v )

inlineprivate

Construct from an integral type.

Parameters

[in] v Integer value to represent.

Definition at line 393 of file int64x64-128.h.

◆ int64x64_t() [13/34]

ns3::int64x64_t::int64x64_t ( )

inline

Default constructor.

Definition at line 79 of file int64x64-cairo.h.

References _v.

◆ int64x64_t() [14/34]

ns3::int64x64_t::int64x64_t ( const double value )

inline

Construct from a floating point value.

Parameters

[in] value floating value to represent

Definition at line 90 of file int64x64-cairo.h.

References _v.

◆ int64x64_t() [15/34]

ns3::int64x64_t::int64x64_t ( const long double value )

inline

Construct from a floating point value.

Parameters

[in] value floating value to represent

Definition at line 95 of file int64x64-cairo.h.

References _cairo_int128_negate, _v, and HP_MAX_64.

◆ int64x64_t() [16/34]

ns3::int64x64_t::int64x64_t ( const int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 131 of file int64x64-cairo.h.

References _v.

◆ int64x64_t() [17/34]

ns3::int64x64_t::int64x64_t ( const long int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 136 of file int64x64-cairo.h.

References _v.

◆ int64x64_t() [18/34]

ns3::int64x64_t::int64x64_t ( const long long int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 141 of file int64x64-cairo.h.

References _v.

◆ int64x64_t() [19/34]

ns3::int64x64_t::int64x64_t ( const unsigned int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 146 of file int64x64-cairo.h.

References _v.

◆ int64x64_t() [20/34]

ns3::int64x64_t::int64x64_t ( const unsigned long int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 151 of file int64x64-cairo.h.

References _v.

◆ int64x64_t() [21/34]

ns3::int64x64_t::int64x64_t ( const unsigned long long int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 156 of file int64x64-cairo.h.

References _v.

◆ int64x64_t() [22/34]

ns3::int64x64_t::int64x64_t	(	const int64_t	hi,
		const uint64_t	lo
	)

inlineexplicit

Construct from explicit high and low values.

Parameters

[in]	hi	Integer portion.
[in]	lo	Fractional portion, already scaled to HP_MAX_64.

Definition at line 168 of file int64x64-cairo.h.

References _v.

◆ int64x64_t() [23/34]

ns3::int64x64_t::int64x64_t ( const int64x64_t & o )

inline

Copy constructor.

Parameters

[in] o Value to copy.

Definition at line 179 of file int64x64-cairo.h.

◆ int64x64_t() [24/34]

ns3::int64x64_t::int64x64_t ( )

inline

Default constructor.

Definition at line 78 of file int64x64-double.h.

◆ int64x64_t() [25/34]

ns3::int64x64_t::int64x64_t ( double v )

inline

Construct from a floating point value.

Parameters

[in] v Floating value to represent

Definition at line 87 of file int64x64-double.h.

◆ int64x64_t() [26/34]

ns3::int64x64_t::int64x64_t ( long double v )

inline

Construct from a floating point value.

Parameters

[in] v Floating value to represent

Definition at line 90 of file int64x64-double.h.

◆ int64x64_t() [27/34]

ns3::int64x64_t::int64x64_t ( int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 101 of file int64x64-double.h.

◆ int64x64_t() [28/34]

ns3::int64x64_t::int64x64_t ( long int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 104 of file int64x64-double.h.

◆ int64x64_t() [29/34]

ns3::int64x64_t::int64x64_t ( long long int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 107 of file int64x64-double.h.

◆ int64x64_t() [30/34]

ns3::int64x64_t::int64x64_t ( unsigned int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 110 of file int64x64-double.h.

◆ int64x64_t() [31/34]

ns3::int64x64_t::int64x64_t ( unsigned long int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 113 of file int64x64-double.h.

◆ int64x64_t() [32/34]

ns3::int64x64_t::int64x64_t ( unsigned long long int v )

inline

Construct from an integral type.

Parameters

[in] v Integer value to represent

Definition at line 116 of file int64x64-double.h.

◆ int64x64_t() [33/34]

ns3::int64x64_t::int64x64_t	(	int64_t	hi,
		uint64_t	lo
	)

inlineexplicit

Construct from explicit high and low values.

Parameters

[in]	hi	Integer portion.
[in]	lo	Fractional portion, already scaled to HP_MAX_64.

Definition at line 126 of file int64x64-double.h.

References _v, and HP_MAX_64.

◆ int64x64_t() [34/34]

ns3::int64x64_t::int64x64_t ( const int64x64_t & o )

inline

Copy constructor.

Parameters

[in] o Value to copy.

Definition at line 142 of file int64x64-double.h.

Member Function Documentation

◆ Div() [1/2]

void ns3::int64x64_t::Div ( const int64x64_t & o )

private

Implement /=.

Parameters

[in] o The divisor.

Definition at line 113 of file int64x64-128.cc.

References _v, ns3::output_sign(), and Udiv().

Referenced by ns3::operator/=().

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◆ Div() [2/2]

void ns3::int64x64_t::Div ( const int64x64_t & o )

private

Implement /=.

Parameters

[in] o The divisor.

◆ GetDouble() [1/3]

double ns3::int64x64_t::GetDouble ( void ) const

inline

Get this value as a double.

Returns: This value in floating form.

Definition at line 206 of file int64x64-128.h.

References _v, HP_MASK_LO, and HP_MAX_64.

Referenced by ns3::int64x64::test::Int64x64Bug455TestCase::DoRun(), ns3::int64x64::test::Int64x64Bug863TestCase::DoRun(), ns3::ShowProgress::GiveFeedback(), and ns3::Time::ToDouble().

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◆ GetDouble() [2/3]

double ns3::int64x64_t::GetDouble ( void ) const

inline

Get this value as a double.

Returns: This value in floating form.

Definition at line 199 of file int64x64-cairo.h.

References _cairo_int128_negate, _cairo_int128_negative, _v, cairo_int128_t::hi, HP_MAX_64, and cairo_int128_t::lo.

◆ GetDouble() [3/3]

double ns3::int64x64_t::GetDouble ( void ) const

inline

Get this value as a double.

Returns: This value in floating form.

Definition at line 162 of file int64x64-double.h.

References _v.

◆ GetHigh() [1/3]

int64_t ns3::int64x64_t::GetHigh ( void ) const

inline

Get the integer portion.

Returns: The integer portion of this value.

Definition at line 222 of file int64x64-128.h.

References _v.

Referenced by ns3::OnOffApplication::CancelEvents(), ns3::int64x64::test::Int64x64HiLoTestCase::Check(), anonymous_namespace{sample-show-progress.cc}::Hold::Event(), Invert(), ns3::operator<<(), and Round().

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◆ GetHigh() [2/3]

int64_t ns3::int64x64_t::GetHigh ( void ) const

inline

Get the integer portion.

Returns: The integer portion of this value.

Definition at line 215 of file int64x64-cairo.h.

References _v.

◆ GetHigh() [3/3]

int64_t ns3::int64x64_t::GetHigh ( void ) const

inline

Get the integer portion.

Returns: The integer portion of this value.

Definition at line 215 of file int64x64-double.h.

References GetHighLow().

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◆ GetHighLow()

std::pair<int64_t, uint64_t> ns3::int64x64_t::GetHighLow ( void ) const

inlineprivate

Get the high and low portions of this value.

Returns: A pair of the high and low words

Definition at line 173 of file int64x64-double.h.

References _v, and HP_MAX_64.

Referenced by GetHigh(), and GetLow().

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◆ GetInt() [1/3]

int64_t ns3::int64x64_t::GetInt ( void ) const

inline

Truncate to an integer.

Truncation is always toward zero,

Returns: The value truncated toward zero.

Definition at line 243 of file int64x64-128.h.

References _v.

Referenced by ns3::int64x64::test::Int64x64IntRoundTestCase::Check().

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◆ GetInt() [2/3]

int64_t ns3::int64x64_t::GetInt ( void ) const

inline

Truncate to an integer.

Truncation is always toward zero,

Returns: The value truncated toward zero.

Definition at line 234 of file int64x64-cairo.h.

References _cairo_int128_negate, _cairo_int128_negative, _v, and cairo_int128_t::hi.

◆ GetInt() [3/3]

int64_t ns3::int64x64_t::GetInt ( void ) const

inline

Truncate to an integer.

Truncation is always toward zero,

Returns: The value truncated toward zero.

Definition at line 234 of file int64x64-double.h.

References _v.

◆ GetLow() [1/3]

uint64_t ns3::int64x64_t::GetLow ( void ) const

inline

Get the fractional portion of this value, unscaled.

Returns: The fractional portion, unscaled, as an integer.

Definition at line 232 of file int64x64-128.h.

References _v, and HP_MASK_LO.

Referenced by ns3::int64x64::test::Int64x64HiLoTestCase::Check(), ns3::int64x64::test::Int64x64InputTestCase::Check(), ns3::operator<<(), and ns3::ReadLoDigits().

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◆ GetLow() [2/3]

uint64_t ns3::int64x64_t::GetLow ( void ) const

inline

Get the fractional portion of this value, unscaled.

Returns: The fractional portion, unscaled, as an integer.

Definition at line 224 of file int64x64-cairo.h.

References _v.

◆ GetLow() [3/3]

uint64_t ns3::int64x64_t::GetLow ( void ) const

inline

Get the fractional portion of this value, unscaled.

Returns: The fractional portion, unscaled, as an integer.

Definition at line 224 of file int64x64-double.h.

References GetHighLow().

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◆ Invert() [1/3]

int64x64_t ns3::int64x64_t::Invert ( const uint64_t v )

static

Compute the inverse of an integer value.

Ordinary division by an integer would be limited to 64 bits of precision. Instead, we multiply by the 128-bit inverse of the divisor. This function computes the inverse to 128-bit precision. MulByInvert() then completes the division.

(Really this should be a separate type representing Q0.128.)

Parameters

[in] v The value to compute the inverse of.

Returns: A Q0.128 representation of the inverse.

Definition at line 217 of file int64x64-128.cc.

References int64x64_t(), _v, GetHigh(), MulByInvert(), NS_ASSERT, and Udiv().

Referenced by ns3::int64x64::test::Int64x64InvertTestCase::Check(), and ns3::Time::SetResolution().

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◆ Invert() [2/3]

static int64x64_t ns3::int64x64_t::Invert ( const uint64_t v )

static

Compute the inverse of an integer value.

Ordinary division by an integer would be limited to 64 bits of precsion. Instead, we multiply by the 128-bit inverse of the divisor. This function computes the inverse to 128-bit precision. MulByInvert() then completes the division.

(Really this should be a separate type representing Q0.128.)

Parameters

[in] v The value to compute the inverse of.

Returns: A Q0.128 representation of the inverse.

◆ Invert() [3/3]

static int64x64_t ns3::int64x64_t::Invert ( uint64_t v )

inlinestatic

Compute the inverse of an integer value.

Parameters

[in] v The value to compute the inverse of.

Returns: The inverse.

Definition at line 272 of file int64x64-double.h.

◆ Mul() [1/2]

void ns3::int64x64_t::Mul ( const int64x64_t & o )

private

Implement *=.

Parameters

[in] o The other factor.

Definition at line 64 of file int64x64-128.cc.

References _v, ns3::output_sign(), and Umul().

Referenced by ns3::operator*=().

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◆ Mul() [2/2]

void ns3::int64x64_t::Mul ( const int64x64_t & o )

private

Implement *=.

Parameters

[in] o The other factor.

◆ MulByInvert() [1/3]

void ns3::int64x64_t::MulByInvert ( const int64x64_t & o )

Multiply this value by a Q0.128 value, presumably representing an inverse, completing a division operation.

Parameters

[in] o The inverse operand.

See also: Invert()

Definition at line 191 of file int64x64-128.cc.

References _v, and UmulByInvert().

Referenced by ns3::int64x64::test::Int64x64InvertTestCase::Check(), ns3::Time::From(), Invert(), and ns3::Time::To().

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◆ MulByInvert() [2/3]

void ns3::int64x64_t::MulByInvert ( const int64x64_t & o )

Multiply this value by a Q0.128 value, presumably representing an inverse, completing a division operation.

Parameters

[in] o The inverse operand.

See also: Invert

◆ MulByInvert() [3/3]

void ns3::int64x64_t::MulByInvert ( const int64x64_t & o )

inline

Multiply this value by a Q0.128 value, presumably representing an inverse, completing a division operation.

Parameters

[in] o The inverse operand.

Note: There is no difference between Q64.64 and Q0.128 in this implementation, so this function is a simple multiply.

Definition at line 261 of file int64x64-double.h.

References _v.

◆ operator=() [1/3]

int64x64_t& ns3::int64x64_t::operator= ( const int64x64_t & o )

inline

Assignment.

Parameters

[in] o Value to assign to this int64x64_t.

Returns: This int64x64_t.

Definition at line 195 of file int64x64-128.h.

References _v.

◆ operator=() [2/3]

int64x64_t& ns3::int64x64_t::operator= ( const int64x64_t & o )

inline

Assignment.

Parameters

[in] o Value to assign to this int64x64_t.

Returns: a copy of o

Definition at line 188 of file int64x64-cairo.h.

References _v.

◆ operator=() [3/3]

int64x64_t& ns3::int64x64_t::operator= ( const int64x64_t & o )

inline

Assignment.

Parameters

[in] o Value to assign to this int64x64_t.

Returns: a copy of o

Definition at line 151 of file int64x64-double.h.

References _v.

◆ Round() [1/3]

int64_t ns3::int64x64_t::Round ( void ) const

inline

Round to the nearest int.

Similar to std::round this rounds halfway cases away from zero, regardless of the current (floating) rounding mode.

Returns: The value rounded to the nearest int.

Definition at line 258 of file int64x64-128.h.

References _v, and GetHigh().

Referenced by ns3::int64x64::test::Int64x64IntRoundTestCase::Check().

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◆ Round() [2/3]

int64_t ns3::int64x64_t::Round ( void ) const

inline

Round to the nearest int.

Similar to std::round this rounds halfway cases away from zero, regardless of the current (floating) rounding mode.

Returns: The value rounded to the nearest int.

Definition at line 249 of file int64x64-cairo.h.

References _cairo_int128_negate, _cairo_int128_negative, _cairo_uint128_add(), and _v.

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◆ Round() [3/3]

int64_t ns3::int64x64_t::Round ( void ) const

inline

Round to the nearest int.

Similar to std::round this rounds halfway cases away from zero, regardless of the current (floating) rounding mode.

Returns: The value rounded to the nearest int.

Definition at line 246 of file int64x64-double.h.

References _v.

◆ Udiv() [1/2]

cairo_uint128_t ns3::int64x64_t::Udiv	(	const cairo_uint128_t	a,
		const cairo_uint128_t	b
	)

staticprivate

Unsigned division of Q64.64 values.

Parameters

[in]	a	Numerator.
[in]	b	Denominator.

Returns: The Q64.64 representation of a / b

Definition at line 128 of file int64x64-cairo.cc.

References _cairo_int128_lsl, _cairo_uint128_add(), _cairo_uint128_divrem(), _cairo_uint128_eq(), _cairo_uint128_lsl(), _cairo_uint128_lt(), _cairo_uint128_rsl(), _cairo_uint32_to_uint128(), HPCAIRO_MASK_HI_BIT, NS_ASSERT_MSG, cairo_uquorem128_t::quo, and cairo_uquorem128_t::rem.

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◆ Udiv() [2/2]

uint128_t ns3::int64x64_t::Udiv	(	const uint128_t	a,
		const uint128_t	b
	)

staticprivate

Unsigned division of Q64.64 values.

Parameters

[in]	a	Numerator.
[in]	b	Denominator.

Returns: The Q64.64 representation of a / b.

Definition at line 122 of file int64x64-128.cc.

References HP128_MASK_HI_BIT, and NS_ASSERT_MSG.

Referenced by Div(), and Invert().

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◆ Umul() [1/2]

cairo_uint128_t ns3::int64x64_t::Umul	(	const cairo_uint128_t	a,
		const cairo_uint128_t	b
	)

staticprivate

Unsigned multiplication of Q64.64 values.

Mathematically this should produce a Q128.128 value; we keep the central 128 bits, representing the Q64.64 result. We assert on integer overflow beyond the 64-bit integer portion.

Parameters

[in]	a	First factor.
[in]	b	Second factor.

Returns: The Q64.64 product.

Internal:

It might be tempting to just use a * b and be done with it, but it's not that simple. With a and b as 128-bit integers, a * b mathematically produces a 256-bit result, which the computer truncates to the lowest 128 bits. In our case, where a and b are interpreted as Q64.64 fixed point numbers, the multiplication mathematically produces a Q128.128 fixed point number. We want the middle 128 bits from the result, truncating both the high and low 64 bits. To achieve this, we carry out the multiplication explicitly with 64-bit operands and 128-bit intermediate results.

Definition at line 83 of file int64x64-cairo.cc.

References _cairo_uint128_add(), _cairo_uint128_lsl(), _cairo_uint64_to_uint128(), _cairo_uint64x64_128_mul(), and NS_ABORT_MSG_IF.

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◆ Umul() [2/2]

uint128_t ns3::int64x64_t::Umul	(	const uint128_t	a,
		const uint128_t	b
	)

staticprivate

Unsigned multiplication of Q64.64 values.

Mathematically this should produce a Q128.128 value; we keep the central 128 bits, representing the Q64.64 result. We assert on integer overflow beyond the 64-bit integer portion.

Parameters

[in]	a	First factor.
[in]	b	Second factor.

Returns: The Q64.64 product.

Internal:

It might be tempting to just use a * b and be done with it, but it's not that simple. With a and b as 128-bit integers, a * b mathematically produces a 256-bit result, which the computer truncates to the lowest 128 bits. In our case, where a and b are interpreted as Q64.64 fixed point numbers, the multiplication mathematically produces a Q128.128 fixed point number. We want the middle 128 bits from the result, truncating both the high and low 64 bits. To achieve this, we carry out the multiplication explicitly with 64-bit operands and 128-bit intermediate results.

Definition at line 73 of file int64x64-128.cc.

References HP_MASK_HI, HP_MASK_LO, and NS_ABORT_MSG_IF.

Referenced by Mul().

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◆ UmulByInvert() [1/2]

cairo_uint128_t ns3::int64x64_t::UmulByInvert	(	const cairo_uint128_t	a,
		const cairo_uint128_t	b
	)

staticprivate

Unsigned multiplication of Q64.64 and Q0.128 values.

Parameters

[in]	a	The numerator, a Q64.64 value.
[in]	b	The inverse of the denominator, a Q0.128 value

Returns: The product a * b, representing the ration a / b^-1

See also: Invert

Definition at line 204 of file int64x64-cairo.cc.

References _cairo_uint128_add(), and _cairo_uint64x64_128_mul().

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◆ UmulByInvert() [2/2]

uint128_t ns3::int64x64_t::UmulByInvert	(	const uint128_t	a,
		const uint128_t	b
	)

staticprivate

Unsigned multiplication of Q64.64 and Q0.128 values.

Parameters

[in]	a	The numerator, a Q64.64 value.
[in]	b	The inverse of the denominator, a Q0.128 value

Returns: The product a * b, representing the ration a / b^-1.

See also: Invert()

Definition at line 201 of file int64x64-128.cc.

References HP_MASK_LO.

Referenced by MulByInvert().

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Friends And Related Function Documentation

◆ operator! [1/3]

int64x64_t operator! ( const int64x64_t & lhs )

friend

Logical not operator.

Parameters

[in] lhs Left hand argument

Returns: The result of the operator.

Definition at line 511 of file int64x64-128.h.

◆ operator! [2/3]

int64x64_t operator! ( const int64x64_t & lhs )

friend

Logical not operator.

Parameters

[in] lhs Left hand argument

Returns: The result of the operator.

Definition at line 511 of file int64x64-128.h.

◆ operator! [3/3]

int64x64_t operator! ( const int64x64_t & lhs )

friend

Logical not operator.

Parameters

[in] lhs Left hand argument

Returns: The result of the operator.

Definition at line 511 of file int64x64-128.h.

◆ operator*= [1/3]

int64x64_t& operator*=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound multiplication operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 467 of file int64x64-128.h.

◆ operator*= [2/3]

int64x64_t& operator*=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound multiplication operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 467 of file int64x64-128.h.

◆ operator*= [3/3]

int64x64_t& operator*=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound multiplication operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 467 of file int64x64-128.h.

◆ operator+= [1/3]

int64x64_t& operator+=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound addition operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 443 of file int64x64-128.h.

◆ operator+= [2/3]

int64x64_t& operator+=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound addition operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 443 of file int64x64-128.h.

◆ operator+= [3/3]

int64x64_t& operator+=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound addition operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 443 of file int64x64-128.h.

◆ operator- [1/3]

int64x64_t operator- ( const int64x64_t & lhs )

friend

Unary operator.

Parameters

[in] lhs Left hand argument

Returns: The result of the operator.

Unary negation operator (change sign operator)

Parameters

[in] lhs Left hand argument

Returns: The result of the operator.

Definition at line 501 of file int64x64-128.h.

◆ operator- [2/3]

int64x64_t operator- ( const int64x64_t & lhs )

friend

Unary operator.

Parameters

[in] lhs Left hand argument

Returns: The result of the operator.

Unary operator.

Unary negation operator (change sign operator)

Parameters

[in] lhs Left hand argument

Returns: The result of the operator.

Definition at line 501 of file int64x64-128.h.

◆ operator- [3/3]

int64x64_t operator- ( const int64x64_t & lhs )

friend

Unary operator.

Parameters

[in] lhs Left hand argument

Returns: The result of the operator.

Unary operator.

Unary negation operator (change sign operator)

Parameters

[in] lhs Left hand argument

Returns: The result of the operator.

Definition at line 501 of file int64x64-128.h.

◆ operator-= [1/3]

int64x64_t& operator-=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound subtraction operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 455 of file int64x64-128.h.

◆ operator-= [2/3]

int64x64_t& operator-=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound subtraction operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 455 of file int64x64-128.h.

◆ operator-= [3/3]

int64x64_t& operator-=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound subtraction operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 455 of file int64x64-128.h.

◆ operator/= [1/3]

int64x64_t& operator/=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound division operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 479 of file int64x64-128.h.

◆ operator/= [2/3]

int64x64_t& operator/=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound division operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 479 of file int64x64-128.h.

◆ operator/= [3/3]

int64x64_t& operator/=	(	int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Compound division operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 479 of file int64x64-128.h.

◆ operator< [1/3]

bool operator<	(	const int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Less than operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 420 of file int64x64-128.h.

◆ operator< [2/3]

bool operator<	(	const int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Less than operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 420 of file int64x64-128.h.

◆ operator< [3/3]

bool operator<	(	const int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Less than operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 420 of file int64x64-128.h.

◆ operator== [1/3]

bool operator==	(	const int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Arithmetic operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 409 of file int64x64-128.h.

◆ operator== [2/3]

bool operator==	(	const int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Arithmetic operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Arithmetic operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 409 of file int64x64-128.h.

◆ operator== [3/3]

bool operator==	(	const int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Arithmetic operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Arithmetic operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 409 of file int64x64-128.h.

◆ operator> [1/3]

bool operator>	(	const int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Greater operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 431 of file int64x64-128.h.

◆ operator> [2/3]

bool operator>	(	const int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Greater operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 431 of file int64x64-128.h.

◆ operator> [3/3]

bool operator>	(	const int64x64_t &	lhs,
		const int64x64_t &	rhs
	)

friend

Greater operator.

Parameters

[in]	lhs	Left hand argument
[in]	rhs	Right hand argument

Returns: The result of the operator.

Definition at line 431 of file int64x64-128.h.

Member Data Documentation

◆ _v [1/3]

int128_t ns3::int64x64_t::_v

private

The Q64.64 value.

Definition at line 397 of file int64x64-128.h.

Referenced by int64x64_t(), Div(), GetDouble(), GetHigh(), GetHighLow(), GetInt(), GetLow(), Invert(), Mul(), MulByInvert(), ns3::operator!(), ns3::operator+=(), ns3::operator-(), ns3::operator-=(), ns3::operator<(), operator=(), ns3::operator==(), ns3::operator>(), and Round().

◆ _v [2/3]

cairo_int128_t ns3::int64x64_t::_v

private

The Q64.64 value.

Definition at line 379 of file int64x64-cairo.h.

◆ _v [3/3]

long double ns3::int64x64_t::_v

private

The Q64.64 value.

Definition at line 316 of file int64x64-double.h.

◆ HP128_MASK_HI_BIT

const uint128_t ns3::int64x64_t::HP128_MASK_HI_BIT = (((int128_t)1) << 127)

staticprivate

uint128_t high bit (sign bit).

Definition at line 48 of file int64x64-128.h.

Referenced by Udiv().

◆ HP_MASK_HI

const uint64_t ns3::int64x64_t::HP_MASK_HI = ~HP_MASK_LO

staticprivate

Mask for sign + integer part.

Definition at line 52 of file int64x64-128.h.

Referenced by Umul().

◆ HP_MASK_LO

static const uint64_t ns3::int64x64_t::HP_MASK_LO = 0xffffffffffffffffULL

staticprivate

Mask for fraction part.

Definition at line 50 of file int64x64-128.h.

Referenced by GetDouble(), GetLow(), Umul(), and UmulByInvert().

◆ HPCAIRO_MASK_HI_BIT

const uint64_t ns3::int64x64_t::HPCAIRO_MASK_HI_BIT = (((uint64_t)1) << 63)

staticprivate

High bit of fractional part.

Definition at line 43 of file int64x64-cairo.h.

Referenced by Udiv().

◆ implementation

static enum impl_type ns3::int64x64_t::implementation = int128_impl

static

Type tag for this implementation.

Definition at line 52 of file int64x64-128.h.

Referenced by ns3::int64x64::test::Int64x64InvertTestCase::Check(), ns3::int64x64::test::Int64x64HiLoTestCase::Check(), ns3::int64x64::test::Int64x64DoubleTestCase::Check(), ns3::int64x64::test::Int64x64HiLoTestCase::DoRun(), ns3::int64x64::test::Int64x64InputTestCase::DoRun(), ns3::int64x64::test::Int64x64InputOutputTestCase::DoRun(), ns3::int64x64::test::Int64x64Bug1786TestCase::DoRun(), and ns3::int64x64::test::Int64x64ImplTestCase::DoRun().

The documentation for this class was generated from the following files:

src/core/model/int64x64-128.h
src/core/model/int64x64-cairo.h
src/core/model/int64x64-double.h
src/core/model/int64x64-128.cc
src/core/model/int64x64-cairo.cc

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Private Member Functions

Static Private Member Functions

Private Attributes

Static Private Attributes

Friends

Detailed Description

Member Enumeration Documentation

◆ impl_type [1/3]

◆ impl_type [2/3]

◆ impl_type [3/3]

Constructor & Destructor Documentation

◆ int64x64_t() [1/34]

◆ int64x64_t() [2/34]

◆ int64x64_t() [3/34]

◆ int64x64_t() [4/34]

◆ int64x64_t() [5/34]

◆ int64x64_t() [6/34]

◆ int64x64_t() [7/34]

◆ int64x64_t() [8/34]

◆ int64x64_t() [9/34]

◆ int64x64_t() [10/34]

◆ int64x64_t() [11/34]

◆ int64x64_t() [12/34]

◆ int64x64_t() [13/34]

◆ int64x64_t() [14/34]

◆ int64x64_t() [15/34]

◆ int64x64_t() [16/34]

◆ int64x64_t() [17/34]

◆ int64x64_t() [18/34]

◆ int64x64_t() [19/34]

◆ int64x64_t() [20/34]

◆ int64x64_t() [21/34]

◆ int64x64_t() [22/34]

◆ int64x64_t() [23/34]

◆ int64x64_t() [24/34]

◆ int64x64_t() [25/34]

◆ int64x64_t() [26/34]

◆ int64x64_t() [27/34]

◆ int64x64_t() [28/34]

◆ int64x64_t() [29/34]

◆ int64x64_t() [30/34]

◆ int64x64_t() [31/34]

◆ int64x64_t() [32/34]

◆ int64x64_t() [33/34]

◆ int64x64_t() [34/34]

Member Function Documentation

◆ Div() [1/2]

◆ Div() [2/2]

◆ GetDouble() [1/3]

◆ GetDouble() [2/3]

◆ GetDouble() [3/3]

◆ GetHigh() [1/3]

◆ GetHigh() [2/3]

◆ GetHigh() [3/3]

◆ GetHighLow()

◆ GetInt() [1/3]

◆ GetInt() [2/3]

◆ GetInt() [3/3]

◆ GetLow() [1/3]

◆ GetLow() [2/3]

◆ GetLow() [3/3]

◆ Invert() [1/3]

◆ Invert() [2/3]

◆ Invert() [3/3]

◆ Mul() [1/2]

◆ Mul() [2/2]

◆ MulByInvert() [1/3]

◆ MulByInvert() [2/3]

◆ MulByInvert() [3/3]

◆ operator=() [1/3]

◆ operator=() [2/3]

◆ operator=() [3/3]

◆ Round() [1/3]

◆ Round() [2/3]

◆ Round() [3/3]

◆ Udiv() [1/2]