diyfp Struct Reference

Public Member Functions
constexpr	diyfp (std::uint64_t f_, int e_) noexcept

Static Public Member Functions
static diyfp	sub (const diyfp &x, const diyfp &y) noexcept
	returns x - y
static diyfp	mul (const diyfp &x, const diyfp &y) noexcept
	returns x * y
static diyfp	normalize (diyfp x) noexcept
	normalize x such that the significand is >= 2^(q-1)
static diyfp	normalize_to (const diyfp &x, const int target_exponent) noexcept
	normalize x such that the result has the exponent E

Public Attributes
std::uint64_t	f = 0
int	e = 0

Static Public Attributes
static constexpr int	kPrecision = 64

Detailed Description

Definition at line 17677 of file json.hpp.

Constructor & Destructor Documentation

diyfp()

constexpr diyfp ( std::uint64_t  f_, int  e_  )

inlineconstexprnoexcept

Definition at line 17684 of file json.hpp.

Member Function Documentation

mul()

static diyfp mul ( const diyfp &  x, const diyfp &  y  )

inlinestaticnoexcept

returns x * y

Note

The result is rounded. (Only the upper q bits are returned.)

Definition at line 17702 of file json.hpp.

References diyfp::f.

normalize()

static diyfp normalize ( diyfp  x )

inlinestaticnoexcept

normalize x such that the significand is >= 2^(q-1)

Precondition

x.f != 0

Definition at line 17767 of file json.hpp.

References JSON_ASSERT.

normalize_to()

static diyfp normalize_to ( const diyfp &  x, const int  target_exponent  )

inlinestaticnoexcept

normalize x such that the result has the exponent E

Precondition

e >= x.e and the upper e - x.e bits of x.f must be zero.

Definition at line 17784 of file json.hpp.

References diyfp::e, and JSON_ASSERT.

sub()

static diyfp sub ( const diyfp &  x, const diyfp &  y  )

inlinestaticnoexcept

returns x - y

Precondition

x.e == y.e and x.f >= y.f

Definition at line 17690 of file json.hpp.

References JSON_ASSERT.

Member Data Documentation

e

int e = 0

Definition at line 17682 of file json.hpp.

Referenced by detail::dtoa_impl::compute_boundaries(), detail::dtoa_impl::grisu2(), detail::dtoa_impl::grisu2_digit_gen(), and diyfp::normalize_to().

f

std::uint64_t f = 0

Definition at line 17681 of file json.hpp.

Referenced by detail::dtoa_impl::compute_boundaries(), detail::dtoa_impl::grisu2(), detail::dtoa_impl::grisu2_digit_gen(), and diyfp::mul().

kPrecision

constexpr int kPrecision = 64

staticconstexpr

Definition at line 17679 of file json.hpp.

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

• share/json.hpp