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

Collaboration diagram for nlohmann::detail::dtoa_impl::diyfp:

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...

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

Static Public Attributes
static constexpr int	kPrecision = 64

Member Function Documentation

mul()

static diyfp nlohmann::detail::dtoa_impl::diyfp::mul ( const diyfp &  x, const diyfp &  y  )

staticnoexcept

returns x * y

Note

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

normalize()

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

staticnoexcept

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

Precondition

x.f != 0

normalize_to()

static diyfp nlohmann::detail::dtoa_impl::diyfp::normalize_to ( const diyfp &  x, const int  target_exponent  )

staticnoexcept

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.

sub()

static diyfp nlohmann::detail::dtoa_impl::diyfp::sub ( const diyfp &  x, const diyfp &  y  )

staticnoexcept

returns x - y

Precondition

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