Duke::FIeeeHelper Struct Reference

#include "IeeeHelper.h"

Static Public Member Functions
static double	MakeFloat (int32 sign, int32 exponent, uint32 mantissa)
static double	MakeDouble (int32 sign, int32 exponent, uint64 mantissa)
static void	BreakDouble (double number, int32 &sign, int32 &exponent, uint64 &mantissa)
static void	BreakFloat (float number, int32 &sign, int32 &exponent, uint32 &mantissa)
static int32	GetExponent (float number)
static int32	GetExponent (double number)

Detailed Description

Provides helper methods for building/extracting float/double types to/from their components

Member Function Documentation

BreakDouble()

DBN_FORCEINLINE void FIeeeHelper::BreakDouble ( double  number, int32 &  sign, int32 &  exponent, uint64 &  mantissa  )

staticFlavor:Static

Gets a component sign, exponent, and mantissa parts from a double.

Parameters

number	The number to get component parts from
sign	On return, contains the sign of the number (0 positive, -1 negative)
exponent	On return, contains the base 2 exponent of the number
mantissa	On return, contains the base 2 mantissa of the number

Implements Opcode:

Flavor:Static 0 ← brkf8 F8 I4& I4& U8&

BreakFloat()

DBN_FORCEINLINE void FIeeeHelper::BreakFloat ( float  number, int32 &  sign, int32 &  exponent, uint32 &  mantissa  )

staticFlavor:Static

Gets a component sign, exponent, and mantissa parts from a float

Parameters

number	The number to get component parts from
sign	On return, contains the sign of the number (0 positive, -1 negative)
exponent	On return, contains the base 2 exponent of the number
mantissa	On return, contains the base 2 mantissa of the number

Implements Opcode:

Flavor:Static 0 ← brkf4 F4 I4& I4& U4&

GetExponent() [1/2]

DBN_FORCEINLINE int32 FIeeeHelper::GetExponent ( double  number )

staticFlavor:Static

Gets the exponent part from a number

Parameters

number

The number to get component parts from

Returns

The base 2 exponent of the number

Implements Opcode:

Flavor:Static I4 ← fexp F8

GetExponent() [2/2]

DBN_FORCEINLINE int32 FIeeeHelper::GetExponent ( float  number )

staticFlavor:Static

Gets the exponent part from a number

Parameters

number

The number to get component parts from

Returns

The base 2 exponent of the number

Implements Opcode:

Flavor:Static I4 ← fexp F4

MakeDouble()

static double Duke::FIeeeHelper::MakeDouble ( int32  sign, int32  exponent, uint64  mantissa  )

staticFlavor:Static

Builds a double from component sign, exponent, and mantissa parts.

Parameters

sign	The sign of the number (>=0 positive, <0 negative)
exponent	The base 2 exponent of the number
mantissa	The base 2 mantissa of the number

Returns

The constructed double

Implements Opcode:

Flavor:Static F8 ← makef8 I4 I4 U8

MakeFloat()

static double Duke::FIeeeHelper::MakeFloat ( int32  sign, int32  exponent, uint32  mantissa  )

staticFlavor:Static

Builds a float from component sign, exponent, and mantissa parts.

Parameters

sign	The sign of the number (>=0 positive, <0 negative)
exponent	The base 2 exponent of the number
mantissa	The base 2 mantissa of the number

Returns

The constructed float

Implements Opcode:

Flavor:Static F4 ← makef4 I4 I4 U4

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

• IeeeHelper.h
• IeeeHelper.inl