10#include "ns3/core-config.h"
16#if defined(INT64X64_USE_128) && !defined(PYTHON_SCAN)
21#if defined(HAVE___UINT128_T) && !defined(HAVE_UINT128_T)
50 static const uint64_t
HP_MASK_LO = 0xffffffffffffffffULL;
54 static constexpr long double HP_MAX_64 = (
static_cast<uint64_t
>(1) << 63) * 2.0L;
96 const bool negative = value < 0;
97 const long double v = negative ? -value : value;
100 long double flo = std::modf(v, &fhi);
109 const long double round = 0.5;
112 const uint64_t lo = flo;
178 explicit inline int64x64_t(
const int64_t hi,
const uint64_t lo)
207 inline explicit operator bool()
const
219 const bool negative =
_v < 0;
220 const int128_t vTemp =
_v + (
_v == std::numeric_limits<int128_t>::min());
221 const uint128_t value = negative ? -vTemp : vTemp;
222 const long double fhi = value >> 64;
224 long double retval = fhi;
226 retval = negative ? -retval : retval;
259 const bool negative =
_v < 0;
261 int64_t retval = value >> 64;
262 retval = negative ? -retval : retval;
274 const bool negative =
_v < 0;
275 int64x64_t value = (negative ? -(*this) : *
this);
278 int64_t retval = value.GetHigh();
279 retval = negative ? -retval : retval;
323 return lhs._v == rhs._v;
328 return lhs._v < rhs._v;
333 return lhs._v > rhs._v;
High precision numerical type, implementing Q64.64 fixed precision.
int64_t GetHigh() const
Get the integer portion.
friend bool operator==(const int64x64_t &lhs, const int64x64_t &rhs)
Arithmetic operator.
static const uint64_t HP_MASK_LO
Mask for fraction part.
static const uint128_t HP128_MASK_HI_BIT
uint128_t high bit (sign bit).
impl_type
Type tag for the underlying implementation.
@ int128_impl
Native int128_t implementation.
@ ld_impl
long double implementation.
@ cairo_impl
Cairo wideint implementation.
friend int64x64_t & operator-=(int64x64_t &lhs, const int64x64_t &rhs)
Arithmetic operator.
friend int64x64_t operator+(const int64x64_t &lhs)
Unary operator.
static constexpr long double HP_MAX_64
Floating point value of HP_MASK_LO + 1.
int64_t Round() const
Round to the nearest int.
void Mul(const int64x64_t &o)
Implement *=.
static uint128_t Udiv(const uint128_t a, const uint128_t b)
Unsigned division of Q64.64 values.
void MulByInvert(const int64x64_t &o)
Multiply this value by a Q0.128 value, presumably representing an inverse, completing a division oper...
friend bool operator<(const int64x64_t &lhs, const int64x64_t &rhs)
Arithmetic operator.
int64x64_t(const long double value)
Constructor from a floating point.
static uint128_t UmulByInvert(const uint128_t a, const uint128_t b)
Unsigned multiplication of Q64.64 and Q0.128 values.
static enum impl_type implementation
Type tag for this implementation.
friend int64x64_t operator!(const int64x64_t &lhs)
Unary operator.
int128_t _v
The Q64.64 value.
friend int64x64_t & operator*=(int64x64_t &lhs, const int64x64_t &rhs)
Arithmetic operator.
int64x64_t(const int64_t hi, const uint64_t lo)
Construct from explicit high and low values.
void Div(const int64x64_t &o)
Implement /=.
int64x64_t(const unsigned long long int v)
Construct from an integral type.
int64x64_t(const unsigned int v)
Construct from an integral type.
int64x64_t(const long int v)
Construct from an integral type.
int64x64_t(const long long int v)
Construct from an integral type.
double GetDouble() const
Get this value as a double.
friend int64x64_t & operator+=(int64x64_t &lhs, const int64x64_t &rhs)
Arithmetic operator.
int64x64_t(const unsigned long int v)
Construct from an integral type.
int64_t GetInt() const
Truncate to an integer.
int64x64_t & operator=(const int64x64_t &o)
Assignment.
friend bool operator>(const int64x64_t &lhs, const int64x64_t &rhs)
Arithmetic operator.
int64x64_t(const int v)
Construct from an integral type.
uint64_t GetLow() const
Get the fractional portion of this value, unscaled.
friend int64x64_t operator-(const int64x64_t &lhs)
Unary operator.
static int64x64_t Invert(const uint64_t v)
Compute the inverse of an integer value.
int64x64_t(const double value)
Constructor from a floating point.
int64x64_t(const int64x64_t &o)
Copy constructor.
friend int64x64_t & operator/=(int64x64_t &lhs, const int64x64_t &rhs)
Arithmetic operator.
int64x64_t()
Default constructor.
static uint128_t Umul(const uint128_t a, const uint128_t b)
Unsigned multiplication of Q64.64 values.
__uint128_t uint128_t
Use uint128_t for int64x64_t implementation.
__int128_t int128_t
Use uint128_t for int64x64_t implementation.
Every class exported by the ns3 library is enclosed in the ns3 namespace.