A Discrete-Event Network Simulator
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ns3::int64x64_t Class Reference

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

#include "int64x64-cairo.h"

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Public Types

enum  impl_type {
  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
}
 Type tag for the underlying implementation. More...
 

Public Member Functions

 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 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...
 
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...
 
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...
 
int64x64_toperator= (const int64x64_t &o)
 Assignment. More...
 
int64x64_toperator= (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...
 
 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 (uint64_t v)
 Compute the inverse of an integer value. More...
 

Static Public Attributes

static enum impl_type implementation = cairo_impl
 Type tag for this implementation. More...
 

Private Member Functions

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...
 

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 cairo_uint128_t Umul (const cairo_uint128_t a, const cairo_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...
 

Private Attributes

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

Static Private Attributes

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

int64x64_t operator! (const int64x64_t &lhs)
 Logical not operator. More...
 
int64x64_toperator*= (int64x64_t &lhs, const int64x64_t &rhs)
 Compound multiplication operator. More...
 
int64x64_toperator+= (int64x64_t &lhs, const int64x64_t &rhs)
 Compound addition operator. More...
 
int64x64_t operator- (const int64x64_t &lhs)
 Unary negation operator (change sign operator) More...
 
int64x64_toperator-= (int64x64_t &lhs, const int64x64_t &rhs)
 Compound subtraction operator. More...
 
int64x64_toperator/= (int64x64_t &lhs, const int64x64_t &rhs)
 Compound division 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)
 Equality operator. More...
 
bool operator> (const int64x64_t &lhs, const int64x64_t &rhs)
 Greater operator. More...
 
Arithmetic Operators

Arithmetic operators for int64x64_t.

bool operator== (const int64x64_t &lhs, const int64x64_t &rhs)
 Equality 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_toperator+= (int64x64_t &lhs, const int64x64_t &rhs)
 Compound addition operator. More...
 
int64x64_toperator-= (int64x64_t &lhs, const int64x64_t &rhs)
 Compound subtraction operator. More...
 
int64x64_toperator*= (int64x64_t &lhs, const int64x64_t &rhs)
 Compound multiplication operator. More...
 
int64x64_toperator/= (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 negation operator (change sign 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 uses cairo 128-bit integers.
Internal:
The implementation documented here uses native long double.

Definition at line 41 of file int64x64-cairo.h.

Member Enumeration Documentation

◆ impl_type [1/2]

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.

cairo_impl 

cairo wideint implementation

ld_impl 

long double implementation

int128_impl 

Native int128_t implementation.

cairo_impl 

cairo wideint implementation

ld_impl 

long double implementation

Definition at line 69 of file int64x64-cairo.h.

◆ impl_type [2/2]

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.

cairo_impl 

cairo wideint implementation

ld_impl 

long double implementation

int128_impl 

Native int128_t implementation.

cairo_impl 

cairo wideint implementation

ld_impl 

long double implementation

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

Constructor & Destructor Documentation

◆ int64x64_t() [1/22]

ns3::int64x64_t::int64x64_t ( )
inline

Default constructor.

Definition at line 80 of file int64x64-cairo.h.

References _v, cairo_int128_t::hi, and cairo_int128_t::lo.

Referenced by Invert().

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◆ int64x64_t() [2/22]

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

Construct from a floating point value.

Parameters
[in]valuefloating value to represent

Definition at line 91 of file int64x64-cairo.h.

References _v.

◆ int64x64_t() [3/22]

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

Construct from a floating point value.

Parameters
[in]valuefloating value to represent

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

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

◆ int64x64_t() [4/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

Definition at line 132 of file int64x64-cairo.h.

References _v, cairo_int128_t::hi, and cairo_int128_t::lo.

◆ int64x64_t() [5/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

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

References _v, cairo_int128_t::hi, and cairo_int128_t::lo.

◆ int64x64_t() [6/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

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

References _v, cairo_int128_t::hi, and cairo_int128_t::lo.

◆ int64x64_t() [7/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

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

References _v, cairo_int128_t::hi, and cairo_int128_t::lo.

◆ int64x64_t() [8/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

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

References _v, cairo_int128_t::hi, and cairo_int128_t::lo.

◆ int64x64_t() [9/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

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

References _v, cairo_int128_t::hi, and cairo_int128_t::lo.

◆ int64x64_t() [10/22]

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

Construct from explicit high and low values.

Parameters
[in]hiInteger portion.
[in]loFractional portion, already scaled to HP_MAX_64.

Definition at line 169 of file int64x64-cairo.h.

References _v, cairo_int128_t::hi, and cairo_int128_t::lo.

◆ int64x64_t() [11/22]

ns3::int64x64_t::int64x64_t ( const int64x64_t o)
inline

Copy constructor.

Parameters
[in]oValue to copy.

Definition at line 180 of file int64x64-cairo.h.

◆ int64x64_t() [12/22]

ns3::int64x64_t::int64x64_t ( )
inline

Default constructor.

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

◆ int64x64_t() [13/22]

ns3::int64x64_t::int64x64_t ( double  v)
inline

Construct from a floating point value.

Parameters
[in]vFloating value to represent

Definition at line 88 of file int64x64-double.h.

◆ int64x64_t() [14/22]

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

Construct from a floating point value.

Parameters
[in]vFloating value to represent

Definition at line 91 of file int64x64-double.h.

◆ int64x64_t() [15/22]

ns3::int64x64_t::int64x64_t ( int  v)
inline

Construct from an integral type.

Parameters
[in]vInteger value to represent

Definition at line 102 of file int64x64-double.h.

◆ int64x64_t() [16/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

Definition at line 105 of file int64x64-double.h.

◆ int64x64_t() [17/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

Definition at line 108 of file int64x64-double.h.

◆ int64x64_t() [18/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

Definition at line 111 of file int64x64-double.h.

◆ int64x64_t() [19/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

Definition at line 114 of file int64x64-double.h.

◆ int64x64_t() [20/22]

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

Construct from an integral type.

Parameters
[in]vInteger value to represent

Definition at line 117 of file int64x64-double.h.

◆ int64x64_t() [21/22]

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

Construct from explicit high and low values.

Parameters
[in]hiInteger portion.
[in]loFractional portion, already scaled to HP_MAX_64.

Definition at line 127 of file int64x64-double.h.

References _v, and HP_MAX_64.

◆ int64x64_t() [22/22]

ns3::int64x64_t::int64x64_t ( const int64x64_t o)
inline

Copy constructor.

Parameters
[in]oValue to copy.

Definition at line 143 of file int64x64-double.h.

Member Function Documentation

◆ Div()

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

Implement /=.

Parameters
[in]oThe divisor.

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

References _v, ns3::output_sign(), test-ns3::result, and Udiv().

Referenced by ns3::operator/=().

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◆ GetDouble() [1/2]

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

Get this value as a double.

Returns
This value in floating form.

Definition at line 200 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.

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

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◆ GetDouble() [2/2]

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

Get this value as a double.

Returns
This value in floating form.

Definition at line 163 of file int64x64-double.h.

References _v.

◆ GetHigh() [1/2]

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

Get the integer portion.

Returns
The integer portion of this value.

Definition at line 216 of file int64x64-cairo.h.

References _v, and cairo_int128_t::hi.

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

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◆ GetHigh() [2/2]

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

Get the integer portion.

Returns
The integer portion of this value.

Definition at line 216 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 174 of file int64x64-double.h.

References _v, and HP_MAX_64.

Referenced by GetHigh(), and GetLow().

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◆ GetInt() [1/2]

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 235 of file int64x64-cairo.h.

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

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

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◆ GetInt() [2/2]

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 235 of file int64x64-double.h.

References _v.

◆ GetLow() [1/2]

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 225 of file int64x64-cairo.h.

References _v, and cairo_int128_t::lo.

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

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◆ GetLow() [2/2]

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 225 of file int64x64-double.h.

References GetHighLow().

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◆ Invert() [1/2]

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]vThe 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(), GetHigh(), MulByInvert(), NS_ASSERT, test-ns3::result, and Udiv().

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

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◆ Invert() [2/2]

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

Compute the inverse of an integer value.

Parameters
[in]vThe value to compute the inverse of.
Returns
The inverse.

Definition at line 273 of file int64x64-double.h.

◆ Mul()

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

Implement *=.

Parameters
[in]oThe other factor.

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

References _v, ns3::output_sign(), test-ns3::result, and Umul().

Referenced by ns3::operator*=().

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◆ MulByInvert() [1/2]

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]oThe inverse operand.
See also
Invert

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

References _v, test-ns3::result, and UmulByInvert().

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

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◆ MulByInvert() [2/2]

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]oThe 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 262 of file int64x64-double.h.

References _v.

◆ operator=() [1/2]

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

Assignment.

Parameters
[in]oValue to assign to this int64x64_t.
Returns
a copy of o

Definition at line 189 of file int64x64-cairo.h.

References _v.

◆ operator=() [2/2]

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

Assignment.

Parameters
[in]oValue to assign to this int64x64_t.
Returns
a copy of o

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

References _v.

◆ Round() [1/2]

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 250 of file int64x64-cairo.h.

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

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

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◆ Round() [2/2]

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 247 of file int64x64-double.h.

References _v.

◆ Udiv()

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]aNumerator.
[in]bDenominator.
Returns
The Q64.64 representation of a / b

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

References NS_ASSERT_MSG, and test-ns3::result.

Referenced by Div(), and Invert().

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◆ Umul()

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]aFirst factor.
[in]bSecond 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_LO, NS_ABORT_MSG_IF, and test-ns3::result.

Referenced by Mul().

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◆ UmulByInvert()

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]aThe numerator, a Q64.64 value.
[in]bThe 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, and test-ns3::result.

Referenced by MulByInvert().

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Friends And Related Function Documentation

◆ operator!

int64x64_t operator! ( const int64x64_t lhs)
friend

Logical not operator.

Parameters
[in]lhsLeft hand argument
Returns
The result of the operator.

Definition at line 490 of file int64x64-cairo.h.

◆ operator*=

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

Compound multiplication operator.

Parameters
[in]lhsLeft hand argument
[in]rhsRight hand argument
Returns
The result of the operator.

Definition at line 444 of file int64x64-cairo.h.

◆ operator+=

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

Compound addition operator.

Parameters
[in]lhsLeft hand argument
[in]rhsRight hand argument
Returns
The result of the operator.

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

◆ operator-

int64x64_t operator- ( const int64x64_t lhs)
friend

Unary negation operator (change sign operator)

Parameters
[in]lhsLeft hand argument
Returns
The result of the operator.

Definition at line 478 of file int64x64-cairo.h.

◆ operator-=

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

Compound subtraction operator.

Parameters
[in]lhsLeft hand argument
[in]rhsRight hand argument
Returns
The result of the operator.

Definition at line 432 of file int64x64-cairo.h.

◆ operator/=

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

Compound division operator.

Parameters
[in]lhsLeft hand argument
[in]rhsRight hand argument
Returns
The result of the operator.

Definition at line 456 of file int64x64-cairo.h.

◆ operator<

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

Less than operator.

Parameters
[in]lhsLeft hand argument
[in]rhsRight hand argument
Returns
The result of the operator.

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

◆ operator==

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

Equality operator.

Parameters
[in]lhsLeft hand argument
[in]rhsRight hand argument
Returns
The result of the operator.

Definition at line 386 of file int64x64-cairo.h.

◆ operator>

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

Greater operator.

Parameters
[in]lhsLeft hand argument
[in]rhsRight hand argument
Returns
The result of the operator.

Definition at line 408 of file int64x64-cairo.h.

Member Data Documentation

◆ _v [1/2]

◆ _v [2/2]

long double ns3::int64x64_t::_v
private

The Q64.64 value.

Definition at line 318 of file int64x64-double.h.

◆ HP_MASK_LO

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

Mask for fraction part.

Definition at line 46 of file int64x64-cairo.h.

Referenced by 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 44 of file int64x64-cairo.h.

◆ implementation


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