dart::DoubleInternals Class Reference

#include <double_internals.h>

Public Member Functions
	DoubleInternals (double d)
uint64_t	AsUint64 () const
int	Exponent () const
uint64_t	Significand () const
bool	IsDenormal () const
bool	IsSpecial () const
int	Sign () const

Static Public Attributes
static constexpr int	kSignificandSize = 53

Detailed Description

Definition at line 18 of file double_internals.h.

Constructor & Destructor Documentation

DoubleInternals()

dart::DoubleInternals::DoubleInternals ( double  d )

inlineexplicit

Definition at line 22 of file double_internals.h.

: d64_(double_to_uint64(d)) {}

Member Function Documentation

AsUint64()

uint64_t dart::DoubleInternals::AsUint64 ( ) const

inline

Definition at line 25 of file double_internals.h.

{ return d64_; }

Exponent()

int dart::DoubleInternals::Exponent ( ) const

inline

Definition at line 27 of file double_internals.h.

                       {
    if (IsDenormal()) return kDenormalExponent;
 
    uint64_t d64 = AsUint64();
    int biased_e =
        static_cast<int>((d64 & kExponentMask) >> kPhysicalSignificandSize);
    return biased_e - kExponentBias;
  }

IsDenormal()

bool dart::DoubleInternals::IsDenormal ( ) const

inline

Definition at line 47 of file double_internals.h.

                          {
    uint64_t d64 = AsUint64();
    return (d64 & kExponentMask) == 0;
  }

IsSpecial()

bool dart::DoubleInternals::IsSpecial ( ) const

inline

Definition at line 54 of file double_internals.h.

                         {
    uint64_t d64 = AsUint64();
    return (d64 & kExponentMask) == kExponentMask;
  }

Sign()

int dart::DoubleInternals::Sign ( ) const

inline

Definition at line 59 of file double_internals.h.

                   {
    uint64_t d64 = AsUint64();
    return (d64 & kSignMask) == 0 ? 1 : -1;
  }

Significand()

uint64_t dart::DoubleInternals::Significand ( ) const

inline

Definition at line 36 of file double_internals.h.

                               {
    uint64_t d64 = AsUint64();
    uint64_t significand = d64 & kSignificandMask;
    if (!IsDenormal()) {
      return significand + kHiddenBit;
    } else {
      return significand;
    }
  }

Member Data Documentation

kSignificandSize

constexpr int dart::DoubleInternals::kSignificandSize = 53

staticconstexpr

Definition at line 20 of file double_internals.h.

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

• third_party/dart-lang/sdk/runtime/vm/double_internals.h