Goby3  3.1.4
2024.02.22
Public Member Functions | Static Public Member Functions | Public Attributes | Static Public Attributes | List of all members
detail::dtoa_impl::diyfp Struct Reference

#include <goby/util/thirdparty/nlohmann/json.hpp>

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

Public Attributes

std::uint64_t f = 0
 
int e = 0
 

Static Public Attributes

static constexpr int kPrecision = 64
 

Detailed Description

Definition at line 16840 of file json.hpp.

Constructor & Destructor Documentation

◆ diyfp()

constexpr detail::dtoa_impl::diyfp::diyfp ( std::uint64_t  f_,
int  e_ 
)
inlineconstexprnoexcept

Definition at line 16847 of file json.hpp.

Member Function Documentation

◆ mul()

static diyfp detail::dtoa_impl::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 16865 of file json.hpp.

◆ normalize()

static diyfp detail::dtoa_impl::diyfp::normalize ( diyfp  x)
inlinestaticnoexcept

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

Precondition
x.f != 0

Definition at line 16930 of file json.hpp.

◆ normalize_to()

static diyfp detail::dtoa_impl::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 16947 of file json.hpp.

◆ sub()

static diyfp detail::dtoa_impl::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 16853 of file json.hpp.

Member Data Documentation

◆ e

int detail::dtoa_impl::diyfp::e = 0

Definition at line 16845 of file json.hpp.

◆ f

std::uint64_t detail::dtoa_impl::diyfp::f = 0

Definition at line 16844 of file json.hpp.

◆ kPrecision

constexpr int detail::dtoa_impl::diyfp::kPrecision = 64
staticconstexpr

Definition at line 16842 of file json.hpp.

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