join::DiyFp Class Reference

hand made floating point. More...

#include <diyfp.hpp>

Public Member Functions
constexpr	DiyFp () noexcept=default
	default constructor.
constexpr	DiyFp (const DiyFp &other) noexcept=default
	copy constructor.
constexpr DiyFp &	operator= (const DiyFp &other) noexcept=default
	copy assignment.
	DiyFp (double value) noexcept
	create floating point using double.
constexpr	DiyFp (uint64_t mantissa, int exponent) noexcept
	create floating point using mantissa and exponent.
	~DiyFp ()=default
	destroy instance.
constexpr DiyFp &	normalize () noexcept
	normalize floating point.
constexpr void	normalizedBoundaries (DiyFp &minus, DiyFp &plus) const noexcept
	get normalized boundaries.
constexpr DiyFp &	operator-= (const DiyFp &rhs) noexcept
	minus operator
constexpr DiyFp &	operator*= (const DiyFp &rhs) noexcept
	multiplication operator.

Public Attributes
uint64_t	_mantissa = 0
	mantissa.
int	_exponent = 0
	exponent.

Static Public Attributes
static constexpr int	_diyMantissaSize = std::numeric_limits <uint64_t>::digits
	home made double mantissa size.
static constexpr int	_mantissaSize = std::numeric_limits <double>::digits - 1
	double mantissa size.
static constexpr int	_exponentBias = 0x3FF + _mantissaSize
	exponent bias.
static constexpr uint64_t	_mantissaMask = 0x000FFFFFFFFFFFFFLLU
	mantissa mask.
static constexpr uint64_t	_exponentMask = 0x7FF0000000000000LLU
	exponent mask.
static constexpr uint64_t	_hiddenBit = 0x0010000000000000LLU
	hidden bit.

Detailed Description

hand made floating point.

Constructor & Destructor Documentation

DiyFp() [1/4]

join::DiyFp::DiyFp ( )

constexprdefaultnoexcept

default constructor.

DiyFp() [2/4]

join::DiyFp::DiyFp ( const DiyFp & other )

constexprdefaultnoexcept

copy constructor.

Parameters

other

object to copy.

DiyFp() [3/4]

join::DiyFp::DiyFp ( double value )

inlineexplicitnoexcept

create floating point using double.

Parameters

value

double value.

DiyFp() [4/4]

join::DiyFp::DiyFp ( uint64_t mantissa, int exponent )

inlineconstexprnoexcept

create floating point using mantissa and exponent.

Parameters

mantissa	mantissa.
exponent	exponent.

~DiyFp()

join::DiyFp::~DiyFp ( )

default

destroy instance.

Member Function Documentation

normalize()

DiyFp & join::DiyFp::normalize ( )

inlineconstexprnoexcept

normalize floating point.

Returns

a reference of the current object.

normalizedBoundaries()

void join::DiyFp::normalizedBoundaries ( DiyFp & minus, DiyFp & plus ) const

inlineconstexprnoexcept

get normalized boundaries.

Returns

normalized boundaries.

operator*=()

DiyFp & join::DiyFp::operator*= ( const DiyFp & rhs )

inlineconstexprnoexcept

multiplication operator.

Parameters

rhs	floating point.

Returns

a reference of the current object.

operator-=()

DiyFp & join::DiyFp::operator-= ( const DiyFp & rhs )

inlineconstexprnoexcept

minus operator

Parameters

rhs	floating point.

Returns

a reference of the current object.

operator=()

DiyFp & join::DiyFp::operator= ( const DiyFp & other )

constexprdefaultnoexcept

copy assignment.

Parameters

other

object to copy.

Returns

a reference of the current object.

Member Data Documentation

_diyMantissaSize

int join::DiyFp::_diyMantissaSize = std::numeric_limits <uint64_t>::digits

staticconstexpr

home made double mantissa size.

_exponent

int join::DiyFp::_exponent = 0

exponent.

_exponentBias

int join::DiyFp::_exponentBias = 0x3FF + _mantissaSize

staticconstexpr

exponent bias.

_exponentMask

uint64_t join::DiyFp::_exponentMask = 0x7FF0000000000000LLU

staticconstexpr

exponent mask.

_hiddenBit

uint64_t join::DiyFp::_hiddenBit = 0x0010000000000000LLU

staticconstexpr

hidden bit.

_mantissa

uint64_t join::DiyFp::_mantissa = 0

mantissa.

_mantissaMask

uint64_t join::DiyFp::_mantissaMask = 0x000FFFFFFFFFFFFFLLU

staticconstexpr

mantissa mask.

_mantissaSize

int join::DiyFp::_mantissaSize = std::numeric_limits <double>::digits - 1

staticconstexpr

double mantissa size.

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

• data/include/join/diyfp.hpp