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Classes | Functions | Variables
Softfloat support
Core functionality » Utility and system functions and macros

Classes

struct  cv::softdouble
 
struct  cv::softfloat
 

Functions

 cv::softdouble::softdouble ()
 Default constructor.
 
 cv::softdouble::softdouble (const double a)
 Construct from double.
 
 cv::softdouble::softdouble (const int32_t)
 
 cv::softdouble::softdouble (const int64_t)
 
 cv::softdouble::softdouble (const softdouble &c)
 Copy constructor.
 
 cv::softdouble::softdouble (const uint32_t)
 Construct from integer.
 
 cv::softdouble::softdouble (const uint64_t)
 
 cv::softfloat::softfloat ()
 Default constructor.
 
 cv::softfloat::softfloat (const float a)
 Construct from float.
 
 cv::softfloat::softfloat (const int32_t)
 
 cv::softfloat::softfloat (const int64_t)
 
 cv::softfloat::softfloat (const softfloat &c)
 Copy constructor.
 
 cv::softfloat::softfloat (const uint32_t)
 Construct from integer.
 
 cv::softfloat::softfloat (const uint64_t)
 
softdouble cv::abs (softdouble a)
 
softfloat cv::abs (softfloat a)
 Absolute value.
 
softfloat cv::cbrt (const softfloat &a)
 Cube root.
 
softdouble cv::cos (const softdouble &a)
 Cosine.
 
static softfloat cv::softfloat::eps ()
 Difference between 1 and next representable value.
 
static softdouble cv::softdouble::eps ()
 Difference between 1 and next representable value.
 
softdouble cv::exp (const softdouble &a)
 
softfloat cv::exp (const softfloat &a)
 Exponent.
 
static const softfloat cv::softfloat::fromRaw (const uint32_t a)
 Construct from raw.
 
static softdouble cv::softdouble::fromRaw (const uint64_t a)
 Construct from raw.
 
int cv::softfloat::getExp () const
 Get 0-based exponent.
 
int cv::softdouble::getExp () const
 Get 0-based exponent.
 
softfloat cv::softfloat::getFrac () const
 Get a fraction part.
 
softdouble cv::softdouble::getFrac () const
 Get a fraction part.
 
bool cv::softfloat::getSign () const
 Get sign bit.
 
bool cv::softdouble::getSign () const
 Get sign bit.
 
static softfloat cv::softfloat::inf ()
 Positive infinity constant.
 
static softdouble cv::softdouble::inf ()
 Positive infinity constant.
 
bool cv::softfloat::isInf () const
 Inf state indicator.
 
bool cv::softdouble::isInf () const
 Inf state indicator.
 
bool cv::softfloat::isNaN () const
 NaN state indicator.
 
bool cv::softdouble::isNaN () const
 NaN state indicator.
 
bool cv::softfloat::isSubnormal () const
 Subnormal number indicator.
 
bool cv::softdouble::isSubnormal () const
 Subnormal number indicator.
 
softdouble cv::log (const softdouble &a)
 
softfloat cv::log (const softfloat &a)
 Natural logarithm.
 
static softfloat cv::softfloat::max ()
 Biggest finite value.
 
static softdouble cv::softdouble::max ()
 Biggest finite value.
 
softdouble cv::max (const softdouble &a, const softdouble &b)
 
softfloat cv::max (const softfloat &a, const softfloat &b)
 
static softfloat cv::softfloat::min ()
 Smallest normalized value.
 
static softdouble cv::softdouble::min ()
 Smallest normalized value.
 
softdouble cv::min (const softdouble &a, const softdouble &b)
 
softfloat cv::min (const softfloat &a, const softfloat &b)
 Min and Max functions.
 
softdouble cv::mulAdd (const softdouble &a, const softdouble &b, const softdouble &c)
 
softfloat cv::mulAdd (const softfloat &a, const softfloat &b, const softfloat &c)
 Fused Multiplication and Addition.
 
static softfloat cv::softfloat::nan ()
 Default NaN constant.
 
static softdouble cv::softdouble::nan ()
 Default NaN constant.
 
static softfloat cv::softfloat::one ()
 One constant.
 
static softdouble cv::softdouble::one ()
 One constant.
 
 cv::softdouble::operator double () const
 
 cv::softfloat::operator float () const
 
 cv::softfloat::operator softdouble () const
 Type casts

 
 cv::softdouble::operator softfloat () const
 Type casts

 
bool cv::softdouble::operator!= (const softdouble &) const
 
bool cv::softfloat::operator!= (const softfloat &) const
 
softdouble cv::softdouble::operator% (const softdouble &) const
 Remainder operator.
 
softfloat cv::softfloat::operator% (const softfloat &) const
 Remainder operator.
 
softdouble & cv::softdouble::operator%= (const softdouble &a)
 
softfloat & cv::softfloat::operator%= (const softfloat &a)
 
softdouble cv::softdouble::operator* (const softdouble &) const
 
softfloat cv::softfloat::operator* (const softfloat &) const
 
softdouble & cv::softdouble::operator*= (const softdouble &a)
 
softfloat & cv::softfloat::operator*= (const softfloat &a)
 
softdouble cv::softdouble::operator+ (const softdouble &) const
 Basic arithmetics.
 
softfloat cv::softfloat::operator+ (const softfloat &) const
 Basic arithmetics.
 
softdouble & cv::softdouble::operator+= (const softdouble &a)
 
softfloat & cv::softfloat::operator+= (const softfloat &a)
 
softfloat cv::softfloat::operator- () const
 
softdouble cv::softdouble::operator- () const
 
softdouble cv::softdouble::operator- (const softdouble &) const
 
softfloat cv::softfloat::operator- (const softfloat &) const
 
softdouble & cv::softdouble::operator-= (const softdouble &a)
 
softfloat & cv::softfloat::operator-= (const softfloat &a)
 
softdouble cv::softdouble::operator/ (const softdouble &) const
 
softfloat cv::softfloat::operator/ (const softfloat &) const
 
softdouble & cv::softdouble::operator/= (const softdouble &a)
 
softfloat & cv::softfloat::operator/= (const softfloat &a)
 
bool cv::softdouble::operator< (const softdouble &) const
 
bool cv::softfloat::operator< (const softfloat &) const
 
bool cv::softdouble::operator<= (const softdouble &) const
 
bool cv::softfloat::operator<= (const softfloat &) const
 
softdouble & cv::softdouble::operator= (const softdouble &c)
 Assign constructor.
 
softfloat & cv::softfloat::operator= (const softfloat &c)
 Assign constructor.
 
bool cv::softdouble::operator== (const softdouble &) const
 Comparison operations.
 
bool cv::softfloat::operator== (const softfloat &) const
 Comparison operations.
 
bool cv::softdouble::operator> (const softdouble &) const
 
bool cv::softfloat::operator> (const softfloat &) const
 
bool cv::softdouble::operator>= (const softdouble &) const
 
bool cv::softfloat::operator>= (const softfloat &) const
 
static softfloat cv::softfloat::pi ()
 Correct pi approximation.
 
static softdouble cv::softdouble::pi ()
 Correct pi approximation.
 
softdouble cv::pow (const softdouble &a, const softdouble &b)
 
softfloat cv::pow (const softfloat &a, const softfloat &b)
 Raising to the power.
 
template<typename _Tp >
static _Tp cv::saturate_cast (softdouble a)
 
template<typename _Tp >
static _Tp cv::saturate_cast (softfloat a)
 Saturate casts.
 
template<>
int64_t cv::saturate_cast< int64_t > (softdouble a)
 
template<>
int64_t cv::saturate_cast< int64_t > (softfloat a)
 
template<>
schar cv::saturate_cast< schar > (softdouble a)
 
template<>
schar cv::saturate_cast< schar > (softfloat a)
 
template<>
short cv::saturate_cast< short > (softdouble a)
 
template<>
short cv::saturate_cast< short > (softfloat a)
 
template<>
uchar cv::saturate_cast< uchar > (softdouble a)
 
template<>
uchar cv::saturate_cast< uchar > (softfloat a)
 
template<>
uint64_t cv::saturate_cast< uint64_t > (softdouble a)
 
template<>
uint64_t cv::saturate_cast< uint64_t > (softfloat a)
 
template<>
unsigned cv::saturate_cast< unsigned > (softdouble a)
 
template<>
unsigned cv::saturate_cast< unsigned > (softfloat a)
 Saturate cast to unsigned integer and unsigned long long integer We intentionally do not clip negative numbers, to make -1 become 0xffffffff etc.
 
template<>
ushort cv::saturate_cast< ushort > (softdouble a)
 
template<>
ushort cv::saturate_cast< ushort > (softfloat a)
 
softfloat cv::softfloat::setExp (int e) const
 Construct a copy with new 0-based exponent.
 
softdouble cv::softdouble::setExp (int e) const
 Construct a copy with new 0-based exponent.
 
softdouble cv::softdouble::setFrac (const softdouble &s) const
 Construct a copy with provided significand.
 
softfloat cv::softfloat::setFrac (const softfloat &s) const
 Construct a copy with provided significand.
 
softfloat cv::softfloat::setSign (bool sign) const
 Construct a copy with new sign bit.
 
softdouble cv::softdouble::setSign (bool sign) const
 Construct a copy with new sign bit.
 
softdouble cv::sin (const softdouble &a)
 Sine.
 
softdouble cv::sqrt (const softdouble &a)
 
softfloat cv::sqrt (const softfloat &a)
 Square root.
 
static softfloat cv::softfloat::zero ()
 Zero constant.
 
static softdouble cv::softdouble::zero ()
 Zero constant.
 

Variables

uint32_t cv::softfloat::v
 
uint64_t cv::softdouble::v
 

Detailed Description

SoftFloat is a software implementation of floating-point calculations according to IEEE 754 standard. All calculations are done in integers, that's why they are machine-independent and bit-exact. This library can be useful in accuracy-critical parts like look-up tables generation, tests, etc. OpenCV contains a subset of SoftFloat partially rewritten to C++.

Types

There are two basic types: softfloat and softdouble. These types are binary compatible with float and double types respectively and support conversions to/from them. Other types from original SoftFloat library like fp16 or fp128 were thrown away as well as quiet/signaling NaN support, on-the-fly rounding mode switch and exception flags (though exceptions can be implemented in the future).

Operations

Both types support the following:

  • Construction from signed and unsigned 32-bit and 64 integers, float/double or raw binary representation
  • Conversions between each other, to float or double and to int using cvRound, cvTrunc, cvFloor, cvCeil or a bunch of saturate_cast functions
  • Add, subtract, multiply, divide, remainder, square root, FMA with absolute precision
  • Comparison operations
  • Explicit sign, exponent and significand manipulation through get/set methods, number state indicators (isInf, isNan, isSubnormal)
  • Type-specific constants like eps, minimum/maximum value, best pi approximation, etc.
  • min(), max(), abs(), exp(), log() and pow() functions

Function Documentation

◆ softdouble() [1/7]

cv::softdouble::softdouble ( )
inline

#include <opencv2/core/softfloat.hpp>

Default constructor.

◆ softdouble() [2/7]

cv::softdouble::softdouble ( const double  a)
inlineexplicit

#include <opencv2/core/softfloat.hpp>

Construct from double.

◆ softdouble() [3/7]

cv::softdouble::softdouble ( const int32_t  )
explicit

#include <opencv2/core/softfloat.hpp>

◆ softdouble() [4/7]

cv::softdouble::softdouble ( const int64_t  )
explicit

#include <opencv2/core/softfloat.hpp>

◆ softdouble() [5/7]

cv::softdouble::softdouble ( const softdouble &  c)
inline

#include <opencv2/core/softfloat.hpp>

Copy constructor.

◆ softdouble() [6/7]

cv::softdouble::softdouble ( const uint32_t  )
explicit

#include <opencv2/core/softfloat.hpp>

Construct from integer.

◆ softdouble() [7/7]

cv::softdouble::softdouble ( const uint64_t  )
explicit

#include <opencv2/core/softfloat.hpp>

◆ softfloat() [1/7]

cv::softfloat::softfloat ( )
inline

#include <opencv2/core/softfloat.hpp>

Default constructor.

◆ softfloat() [2/7]

cv::softfloat::softfloat ( const float  a)
inlineexplicit

#include <opencv2/core/softfloat.hpp>

Construct from float.

◆ softfloat() [3/7]

cv::softfloat::softfloat ( const int32_t  )
explicit

#include <opencv2/core/softfloat.hpp>

◆ softfloat() [4/7]

cv::softfloat::softfloat ( const int64_t  )
explicit

#include <opencv2/core/softfloat.hpp>

◆ softfloat() [5/7]

cv::softfloat::softfloat ( const softfloat &  c)
inline

#include <opencv2/core/softfloat.hpp>

Copy constructor.

◆ softfloat() [6/7]

cv::softfloat::softfloat ( const uint32_t  )
explicit

#include <opencv2/core/softfloat.hpp>

Construct from integer.

◆ softfloat() [7/7]

cv::softfloat::softfloat ( const uint64_t  )
explicit

#include <opencv2/core/softfloat.hpp>

◆ abs() [1/2]

softdouble cv::abs ( softdouble  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ abs() [2/2]

softfloat cv::abs ( softfloat  a)
inline

#include <opencv2/core/softfloat.hpp>

Absolute value.

◆ cbrt()

softfloat cv::cbrt ( const softfloat &  a)

#include <opencv2/core/softfloat.hpp>

Cube root.

Special cases:

  • cbrt(NaN) is NaN
  • cbrt(+/-Inf) is +/-Inf

◆ cos()

softdouble cv::cos ( const softdouble &  a)

#include <opencv2/core/softfloat.hpp>

Cosine.

Special cases:

  • cos(Inf) or cos(NaN) is NaN
  • cos(x) == +/- 1 when cos(x) is close to +/- 1

◆ eps() [1/2]

static softfloat cv::softfloat::eps ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Difference between 1 and next representable value.

◆ eps() [2/2]

static softdouble cv::softdouble::eps ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Difference between 1 and next representable value.

◆ exp() [1/2]

softdouble cv::exp ( const softdouble &  a)

#include <opencv2/core/softfloat.hpp>

◆ exp() [2/2]

softfloat cv::exp ( const softfloat &  a)

#include <opencv2/core/softfloat.hpp>

Exponent.

Special cases:

  • exp(NaN) is NaN
  • exp(-Inf) == 0
  • exp(+Inf) == +Inf

◆ fromRaw() [1/2]

static const softfloat cv::softfloat::fromRaw ( const uint32_t  a)
inlinestatic

#include <opencv2/core/softfloat.hpp>

Construct from raw.

Builds new value from raw binary representation

◆ fromRaw() [2/2]

static softdouble cv::softdouble::fromRaw ( const uint64_t  a)
inlinestatic

#include <opencv2/core/softfloat.hpp>

Construct from raw.

Builds new value from raw binary representation

◆ getExp() [1/2]

int cv::softfloat::getExp ( ) const
inline

#include <opencv2/core/softfloat.hpp>

Get 0-based exponent.

◆ getExp() [2/2]

int cv::softdouble::getExp ( ) const
inline

#include <opencv2/core/softfloat.hpp>

Get 0-based exponent.

◆ getFrac() [1/2]

softfloat cv::softfloat::getFrac ( ) const
inline

#include <opencv2/core/softfloat.hpp>

Get a fraction part.

Returns a number 1 <= x < 2 with the same significand

◆ getFrac() [2/2]

softdouble cv::softdouble::getFrac ( ) const
inline

#include <opencv2/core/softfloat.hpp>

Get a fraction part.

Returns a number 1 <= x < 2 with the same significand

◆ getSign() [1/2]

bool cv::softfloat::getSign ( ) const
inline

#include <opencv2/core/softfloat.hpp>

Get sign bit.

◆ getSign() [2/2]

bool cv::softdouble::getSign ( ) const
inline

#include <opencv2/core/softfloat.hpp>

Get sign bit.

◆ inf() [1/2]

static softfloat cv::softfloat::inf ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Positive infinity constant.

◆ inf() [2/2]

static softdouble cv::softdouble::inf ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Positive infinity constant.

◆ isInf() [1/2]

bool cv::softfloat::isInf ( ) const
inline

#include <opencv2/core/softfloat.hpp>

Inf state indicator.

◆ isInf() [2/2]

bool cv::softdouble::isInf ( ) const
inline

#include <opencv2/core/softfloat.hpp>

Inf state indicator.

◆ isNaN() [1/2]

bool cv::softfloat::isNaN ( ) const
inline

#include <opencv2/core/softfloat.hpp>

NaN state indicator.

◆ isNaN() [2/2]

bool cv::softdouble::isNaN ( ) const
inline

#include <opencv2/core/softfloat.hpp>

NaN state indicator.

◆ isSubnormal() [1/2]

bool cv::softfloat::isSubnormal ( ) const
inline

#include <opencv2/core/softfloat.hpp>

Subnormal number indicator.

◆ isSubnormal() [2/2]

bool cv::softdouble::isSubnormal ( ) const
inline

#include <opencv2/core/softfloat.hpp>

Subnormal number indicator.

◆ log() [1/2]

softdouble cv::log ( const softdouble &  a)

#include <opencv2/core/softfloat.hpp>

◆ log() [2/2]

softfloat cv::log ( const softfloat &  a)

#include <opencv2/core/softfloat.hpp>

Natural logarithm.

Special cases:

  • log(NaN), log(x < 0) are NaN
  • log(0) == -Inf

◆ max() [1/4]

static softfloat cv::softfloat::max ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Biggest finite value.

◆ max() [2/4]

static softdouble cv::softdouble::max ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Biggest finite value.

◆ max() [3/4]

softdouble cv::max ( const softdouble &  a,
const softdouble &  b 
)
inline

#include <opencv2/core/softfloat.hpp>

◆ max() [4/4]

softfloat cv::max ( const softfloat &  a,
const softfloat &  b 
)
inline

#include <opencv2/core/softfloat.hpp>

◆ min() [1/4]

static softfloat cv::softfloat::min ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Smallest normalized value.

◆ min() [2/4]

static softdouble cv::softdouble::min ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Smallest normalized value.

◆ min() [3/4]

softdouble cv::min ( const softdouble &  a,
const softdouble &  b 
)
inline

#include <opencv2/core/softfloat.hpp>

◆ min() [4/4]

softfloat cv::min ( const softfloat &  a,
const softfloat &  b 
)
inline

#include <opencv2/core/softfloat.hpp>

Min and Max functions.

◆ mulAdd() [1/2]

softdouble cv::mulAdd ( const softdouble &  a,
const softdouble &  b,
const softdouble &  c 
)

#include <opencv2/core/softfloat.hpp>

◆ mulAdd() [2/2]

softfloat cv::mulAdd ( const softfloat &  a,
const softfloat &  b,
const softfloat &  c 
)

#include <opencv2/core/softfloat.hpp>

Fused Multiplication and Addition.

Computes (a*b)+c with single rounding

◆ nan() [1/2]

static softfloat cv::softfloat::nan ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Default NaN constant.

◆ nan() [2/2]

static softdouble cv::softdouble::nan ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Default NaN constant.

◆ one() [1/2]

static softfloat cv::softfloat::one ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

One constant.

◆ one() [2/2]

static softdouble cv::softdouble::one ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

One constant.

◆ operator double()

cv::softdouble::operator double ( ) const
inline

#include <opencv2/core/softfloat.hpp>

◆ operator float()

cv::softfloat::operator float ( ) const
inline

#include <opencv2/core/softfloat.hpp>

◆ operator softdouble()

cv::softfloat::operator softdouble ( ) const

#include <opencv2/core/softfloat.hpp>

Type casts

◆ operator softfloat()

cv::softdouble::operator softfloat ( ) const

#include <opencv2/core/softfloat.hpp>

Type casts

◆ operator!=() [1/2]

bool cv::softdouble::operator!= ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator!=() [2/2]

bool cv::softfloat::operator!= ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator%() [1/2]

softdouble cv::softdouble::operator% ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

Remainder operator.

A quote from original SoftFloat manual:

‍The IEEE Standard remainder operation computes the value a - n * b, where n is the integer closest to a / b. If a / b is exactly halfway between two integers, n is the even integer closest to a / b. The IEEE Standard’s remainder operation is always exact and so requires no rounding. Depending on the relative magnitudes of the operands, the remainder functions can take considerably longer to execute than the other SoftFloat functions. This is an inherent characteristic of the remainder operation itself and is not a flaw in the SoftFloat implementation.

◆ operator%() [2/2]

softfloat cv::softfloat::operator% ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

Remainder operator.

A quote from original SoftFloat manual:

‍The IEEE Standard remainder operation computes the value a - n * b, where n is the integer closest to a / b. If a / b is exactly halfway between two integers, n is the even integer closest to a / b. The IEEE Standard’s remainder operation is always exact and so requires no rounding. Depending on the relative magnitudes of the operands, the remainder functions can take considerably longer to execute than the other SoftFloat functions. This is an inherent characteristic of the remainder operation itself and is not a flaw in the SoftFloat implementation.

◆ operator%=() [1/2]

softdouble & cv::softdouble::operator%= ( const softdouble &  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ operator%=() [2/2]

softfloat & cv::softfloat::operator%= ( const softfloat &  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ operator*() [1/2]

softdouble cv::softdouble::operator* ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator*() [2/2]

softfloat cv::softfloat::operator* ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator*=() [1/2]

softdouble & cv::softdouble::operator*= ( const softdouble &  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ operator*=() [2/2]

softfloat & cv::softfloat::operator*= ( const softfloat &  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ operator+() [1/2]

softdouble cv::softdouble::operator+ ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

Basic arithmetics.

◆ operator+() [2/2]

softfloat cv::softfloat::operator+ ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

Basic arithmetics.

◆ operator+=() [1/2]

softdouble & cv::softdouble::operator+= ( const softdouble &  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ operator+=() [2/2]

softfloat & cv::softfloat::operator+= ( const softfloat &  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ operator-() [1/4]

softfloat cv::softfloat::operator- ( ) const
inline

#include <opencv2/core/softfloat.hpp>

◆ operator-() [2/4]

softdouble cv::softdouble::operator- ( ) const
inline

#include <opencv2/core/softfloat.hpp>

◆ operator-() [3/4]

softdouble cv::softdouble::operator- ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator-() [4/4]

softfloat cv::softfloat::operator- ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator-=() [1/2]

softdouble & cv::softdouble::operator-= ( const softdouble &  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ operator-=() [2/2]

softfloat & cv::softfloat::operator-= ( const softfloat &  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ operator/() [1/2]

softdouble cv::softdouble::operator/ ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator/() [2/2]

softfloat cv::softfloat::operator/ ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator/=() [1/2]

softdouble & cv::softdouble::operator/= ( const softdouble &  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ operator/=() [2/2]

softfloat & cv::softfloat::operator/= ( const softfloat &  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ operator<() [1/2]

bool cv::softdouble::operator< ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator<() [2/2]

bool cv::softfloat::operator< ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator<=() [1/2]

bool cv::softdouble::operator<= ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator<=() [2/2]

bool cv::softfloat::operator<= ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator=() [1/2]

softdouble & cv::softdouble::operator= ( const softdouble &  c)
inline

#include <opencv2/core/softfloat.hpp>

Assign constructor.

◆ operator=() [2/2]

softfloat & cv::softfloat::operator= ( const softfloat &  c)
inline

#include <opencv2/core/softfloat.hpp>

Assign constructor.

◆ operator==() [1/2]

bool cv::softdouble::operator== ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

Comparison operations.

  • Any operation with NaN produces false
    • The only exception is when x is NaN: x != y for any y.
  • Positive and negative zeros are equal

◆ operator==() [2/2]

bool cv::softfloat::operator== ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

Comparison operations.

  • Any operation with NaN produces false
    • The only exception is when x is NaN: x != y for any y.
  • Positive and negative zeros are equal

◆ operator>() [1/2]

bool cv::softdouble::operator> ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator>() [2/2]

bool cv::softfloat::operator> ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator>=() [1/2]

bool cv::softdouble::operator>= ( const softdouble &  ) const

#include <opencv2/core/softfloat.hpp>

◆ operator>=() [2/2]

bool cv::softfloat::operator>= ( const softfloat &  ) const

#include <opencv2/core/softfloat.hpp>

◆ pi() [1/2]

static softfloat cv::softfloat::pi ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Correct pi approximation.

◆ pi() [2/2]

static softdouble cv::softdouble::pi ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Correct pi approximation.

◆ pow() [1/2]

softdouble cv::pow ( const softdouble &  a,
const softdouble &  b 
)

#include <opencv2/core/softfloat.hpp>

◆ pow() [2/2]

softfloat cv::pow ( const softfloat &  a,
const softfloat &  b 
)

#include <opencv2/core/softfloat.hpp>

Raising to the power.

Special cases:

  • x**NaN is NaN for any x
  • ( |x| == 1 )**Inf is NaN
  • ( |x| > 1 )**+Inf or ( |x| < 1 )**-Inf is +Inf
  • ( |x| > 1 )**-Inf or ( |x| < 1 )**+Inf is 0
  • x ** 0 == 1 for any x
  • x ** 1 == 1 for any x
  • NaN ** y is NaN for any other y
  • Inf**(y < 0) == 0
  • Inf ** y is +Inf for any other y
  • (x < 0)**y is NaN for any other y if x can't be correctly rounded to integer
  • 0 ** 0 == 1
  • 0 ** (y < 0) is +Inf
  • 0 ** (y > 0) is 0

◆ saturate_cast() [1/2]

template<typename _Tp >
static _Tp cv::saturate_cast ( softdouble  a)
inlinestatic

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast() [2/2]

template<typename _Tp >
static _Tp cv::saturate_cast ( softfloat  a)
inlinestatic

#include <opencv2/core/softfloat.hpp>

Saturate casts.

◆ saturate_cast< int64_t >() [1/2]

template<>
int64_t cv::saturate_cast< int64_t > ( softdouble  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< int64_t >() [2/2]

template<>
int64_t cv::saturate_cast< int64_t > ( softfloat  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< schar >() [1/2]

template<>
schar cv::saturate_cast< schar > ( softdouble  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< schar >() [2/2]

template<>
schar cv::saturate_cast< schar > ( softfloat  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< short >() [1/2]

template<>
short cv::saturate_cast< short > ( softdouble  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< short >() [2/2]

template<>
short cv::saturate_cast< short > ( softfloat  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< uchar >() [1/2]

template<>
uchar cv::saturate_cast< uchar > ( softdouble  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< uchar >() [2/2]

template<>
uchar cv::saturate_cast< uchar > ( softfloat  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< uint64_t >() [1/2]

template<>
uint64_t cv::saturate_cast< uint64_t > ( softdouble  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< uint64_t >() [2/2]

template<>
uint64_t cv::saturate_cast< uint64_t > ( softfloat  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< unsigned >() [1/2]

template<>
unsigned cv::saturate_cast< unsigned > ( softdouble  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< unsigned >() [2/2]

template<>
unsigned cv::saturate_cast< unsigned > ( softfloat  a)
inline

#include <opencv2/core/softfloat.hpp>

Saturate cast to unsigned integer and unsigned long long integer We intentionally do not clip negative numbers, to make -1 become 0xffffffff etc.

◆ saturate_cast< ushort >() [1/2]

template<>
ushort cv::saturate_cast< ushort > ( softdouble  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ saturate_cast< ushort >() [2/2]

template<>
ushort cv::saturate_cast< ushort > ( softfloat  a)
inline

#include <opencv2/core/softfloat.hpp>

◆ setExp() [1/2]

softfloat cv::softfloat::setExp ( int  e) const
inline

#include <opencv2/core/softfloat.hpp>

Construct a copy with new 0-based exponent.

◆ setExp() [2/2]

softdouble cv::softdouble::setExp ( int  e) const
inline

#include <opencv2/core/softfloat.hpp>

Construct a copy with new 0-based exponent.

◆ setFrac() [1/2]

softdouble cv::softdouble::setFrac ( const softdouble &  s) const
inline

#include <opencv2/core/softfloat.hpp>

Construct a copy with provided significand.

Constructs a copy of a number with significand taken from parameter

◆ setFrac() [2/2]

softfloat cv::softfloat::setFrac ( const softfloat &  s) const
inline

#include <opencv2/core/softfloat.hpp>

Construct a copy with provided significand.

Constructs a copy of a number with significand taken from parameter

◆ setSign() [1/2]

softfloat cv::softfloat::setSign ( bool  sign) const
inline

#include <opencv2/core/softfloat.hpp>

Construct a copy with new sign bit.

◆ setSign() [2/2]

softdouble cv::softdouble::setSign ( bool  sign) const
inline

#include <opencv2/core/softfloat.hpp>

Construct a copy with new sign bit.

◆ sin()

softdouble cv::sin ( const softdouble &  a)

#include <opencv2/core/softfloat.hpp>

Sine.

Special cases:

  • sin(Inf) or sin(NaN) is NaN
  • sin(x) == x when sin(x) is close to zero

◆ sqrt() [1/2]

softdouble cv::sqrt ( const softdouble &  a)

#include <opencv2/core/softfloat.hpp>

◆ sqrt() [2/2]

softfloat cv::sqrt ( const softfloat &  a)

#include <opencv2/core/softfloat.hpp>

Square root.

◆ zero() [1/2]

static softfloat cv::softfloat::zero ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Zero constant.

◆ zero() [2/2]

static softdouble cv::softdouble::zero ( )
inlinestatic

#include <opencv2/core/softfloat.hpp>

Zero constant.

Variable Documentation

◆ v [1/2]

uint32_t cv::softfloat::v

◆ v [2/2]

uint64_t cv::softdouble::v
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