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nlohmann::detail::dtoa_impl::diyfp Struct Reference

#include <json.hpp>

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Public Member Functions

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

Static Public Member Functions

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...
 
static diyfp sub (const diyfp &x, const diyfp &y) noexcept
 returns x - y More...
 

Data Fields

int e = 0
 
std::uint64_t f = 0
 

Static Public Attributes

static constexpr int kPrecision = 64
 

Detailed Description

Definition at line 15252 of file json.hpp.

Constructor & Destructor Documentation

◆ diyfp()

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

Definition at line 15259 of file json.hpp.

Member Function Documentation

◆ mul()

static diyfp nlohmann::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 15277 of file json.hpp.

References kPrecision, diamondslots::x, and diamondslots::y.

Referenced by nlohmann::detail::dtoa_impl::grisu2().

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◆ normalize()

static diyfp nlohmann::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 15342 of file json.hpp.

References JSON_ASSERT, and diamondslots::x.

Referenced by nlohmann::detail::dtoa_impl::compute_boundaries().

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◆ normalize_to()

static diyfp nlohmann::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 15359 of file json.hpp.

References JSON_ASSERT, and diamondslots::x.

Referenced by nlohmann::detail::dtoa_impl::compute_boundaries().

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◆ sub()

static diyfp nlohmann::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 15265 of file json.hpp.

References JSON_ASSERT, diamondslots::x, and diamondslots::y.

Referenced by nlohmann::detail::dtoa_impl::grisu2_digit_gen().

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Field Documentation

◆ e

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

Definition at line 15257 of file json.hpp.

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

◆ f

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

Definition at line 15256 of file json.hpp.

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

◆ kPrecision

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

Definition at line 15254 of file json.hpp.

Referenced by nlohmann::detail::dtoa_impl::grisu2(), and mul().

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