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Macros
#define	AIR(x) (IR(x)&0x7fffffff)
	Absolute integer representation of a floating-point value. More...

#define	CHECK_VALID_FLOAT(x) ASSERT(IsValidFloat(x));

#define	FCMOVB_ST0 _asm _emit 0xda _asm _emit 0xc0

#define	FCMOVB_ST1 _asm _emit 0xda _asm _emit 0xc1

#define	FCMOVB_ST2 _asm _emit 0xda _asm _emit 0xc2

#define	FCMOVB_ST3 _asm _emit 0xda _asm _emit 0xc3

#define	FCMOVB_ST4 _asm _emit 0xda _asm _emit 0xc4

#define	FCMOVB_ST5 _asm _emit 0xda _asm _emit 0xc5

#define	FCMOVB_ST6 _asm _emit 0xda _asm _emit 0xc6

#define	FCMOVB_ST7 _asm _emit 0xda _asm _emit 0xc7

#define	FCMOVNB_ST0 _asm _emit 0xdb _asm _emit 0xc0

#define	FCMOVNB_ST1 _asm _emit 0xdb _asm _emit 0xc1

#define	FCMOVNB_ST2 _asm _emit 0xdb _asm _emit 0xc2

#define	FCMOVNB_ST3 _asm _emit 0xdb _asm _emit 0xc3

#define	FCMOVNB_ST4 _asm _emit 0xdb _asm _emit 0xc4

#define	FCMOVNB_ST5 _asm _emit 0xdb _asm _emit 0xc5

#define	FCMOVNB_ST6 _asm _emit 0xdb _asm _emit 0xc6

#define	FCMOVNB_ST7 _asm _emit 0xdb _asm _emit 0xc7

#define	FCOMI_ST0 _asm _emit 0xdb _asm _emit 0xf0

#define	FCOMI_ST1 _asm _emit 0xdb _asm _emit 0xf1

#define	FCOMI_ST2 _asm _emit 0xdb _asm _emit 0xf2

#define	FCOMI_ST3 _asm _emit 0xdb _asm _emit 0xf3

#define	FCOMI_ST4 _asm _emit 0xdb _asm _emit 0xf4

#define	FCOMI_ST5 _asm _emit 0xdb _asm _emit 0xf5

#define	FCOMI_ST6 _asm _emit 0xdb _asm _emit 0xf6

#define	FCOMI_ST7 _asm _emit 0xdb _asm _emit 0xf7

#define	FCOMIP_ST0 _asm _emit 0xdf _asm _emit 0xf0

#define	FCOMIP_ST1 _asm _emit 0xdf _asm _emit 0xf1

#define	FCOMIP_ST2 _asm _emit 0xdf _asm _emit 0xf2

#define	FCOMIP_ST3 _asm _emit 0xdf _asm _emit 0xf3

#define	FCOMIP_ST4 _asm _emit 0xdf _asm _emit 0xf4

#define	FCOMIP_ST5 _asm _emit 0xdf _asm _emit 0xf5

#define	FCOMIP_ST6 _asm _emit 0xdf _asm _emit 0xf6

#define	FCOMIP_ST7 _asm _emit 0xdf _asm _emit 0xf7

#define	FR(x) ((float&)(x))
	Floating-point representation of an integer value. More...

#define	IR(x) ((udword&)(x))
	Integer representation of a floating-point value. More...

#define	IS_NEGATIVE_FLOAT(x) ((x)<0)

#define	SIGN_BITMASK 0x80000000

#define	SIR(x) ((sdword&)(x))
	Signed integer representation of a floating-point value. More...

Enumerations
enum	FPUMode { FPU_FLOOR = 0, FPU_CEIL = 1, FPU_BEST = 2, FPU_FORCE_DWORD = 0x7fffffff }

Functions
inline_ float	ComputeFloatEpsilon ()
	This function computes the slowest possible floating-point value (you can also directly use FLT_EPSILON) More...

inline_ int	ConvertToSortable (float f)

inline_ float	FastFabs (float x)

inline_ float	FastSqrt (float square)
	Fast square root for floating-point values. More...

inline_ float	FCMax2 (float a, float b)
	A global function to find MAX(a,b) using FCOMI/FCMOV. More...

inline_ float	FCMax3 (float a, float b, float c)
	A global function to find MAX(a,b,c) using FCOMI/FCMOV. More...

inline_ float	FCMin2 (float a, float b)
	A global function to find MIN(a,b) using FCOMI/FCMOV. More...

inline_ float	FCMin3 (float a, float b, float c)
	A global function to find MIN(a,b,c) using FCOMI/FCMOV. More...

inline_ float	fepsilon (float f)
	Returns the float ranged espilon value. More...

inline_ float	frsqrt (float f)
	Computes 1.0f / sqrtf(x). More...

inline_ float	fsat (float f)
	Saturates positive to zero. More...

inline_ float	fsqrt (float f)
	TO BE DOCUMENTED. More...

FUNCTION ICECORE_API FPUMode	GetFPUMode ()

FUNCTION ICECORE_API int	intCeil (const float &f)

FUNCTION ICECORE_API int	intChop (const float &f)

FUNCTION ICECORE_API int	intFloor (const float &f)

inline_ float	InvSqrt (const float &x)
	Computes 1.0f / sqrtf(x). Comes from NVIDIA. More...

inline_ bool	IsFloatZero (float x, float epsilon=1e-6f)

inline_ bool	IsIndeterminate (float value)

inline_ bool	IsMinusInf (float value)

inline_ bool	IsNAN (float value)
	Is the float valid ? More...

inline_ bool	IsPlusInf (float value)

inline_ bool	IsValidFloat (float value)

FUNCTION ICECORE_API void	RestoreFPU ()

inline_ float	RSqrt (float number)

FUNCTION ICECORE_API void	SaveFPU ()

FUNCTION ICECORE_API void	SetFPUBestMode ()

FUNCTION ICECORE_API void	SetFPUCeilMode ()

FUNCTION ICECORE_API void	SetFPUFloorMode ()

FUNCTION ICECORE_API void	SetFPUPrecision24 ()

FUNCTION ICECORE_API void	SetFPUPrecision53 ()

FUNCTION ICECORE_API void	SetFPUPrecision64 ()

FUNCTION ICECORE_API void	SetFPURoundingChop ()

FUNCTION ICECORE_API void	SetFPURoundingDown ()

FUNCTION ICECORE_API void	SetFPURoundingNear ()

FUNCTION ICECORE_API void	SetFPURoundingUp ()

Detailed Description

Contains FPU related code.

Author: Pierre Terdiman

Date: April, 4, 2000

Definition in file IceFPU.h.

Macro Definition Documentation

◆ AIR

#define AIR ( x ) (IR(x)&0x7fffffff)

Absolute integer representation of a floating-point value.

Definition at line 24 of file IceFPU.h.

◆ CHECK_VALID_FLOAT

#define CHECK_VALID_FLOAT ( x ) ASSERT(IsValidFloat(x));

Definition at line 140 of file IceFPU.h.

◆ FCMOVB_ST0

#define FCMOVB_ST0 _asm _emit 0xda _asm _emit 0xc0

Definition at line 188 of file IceFPU.h.

◆ FCMOVB_ST1

#define FCMOVB_ST1 _asm _emit 0xda _asm _emit 0xc1

Definition at line 193 of file IceFPU.h.

◆ FCMOVB_ST2

#define FCMOVB_ST2 _asm _emit 0xda _asm _emit 0xc2

Definition at line 198 of file IceFPU.h.

◆ FCMOVB_ST3

#define FCMOVB_ST3 _asm _emit 0xda _asm _emit 0xc3

Definition at line 203 of file IceFPU.h.

◆ FCMOVB_ST4

#define FCMOVB_ST4 _asm _emit 0xda _asm _emit 0xc4

Definition at line 208 of file IceFPU.h.

◆ FCMOVB_ST5

#define FCMOVB_ST5 _asm _emit 0xda _asm _emit 0xc5

Definition at line 213 of file IceFPU.h.

◆ FCMOVB_ST6

#define FCMOVB_ST6 _asm _emit 0xda _asm _emit 0xc6

Definition at line 218 of file IceFPU.h.

◆ FCMOVB_ST7

#define FCMOVB_ST7 _asm _emit 0xda _asm _emit 0xc7

Definition at line 223 of file IceFPU.h.

◆ FCMOVNB_ST0

#define FCMOVNB_ST0 _asm _emit 0xdb _asm _emit 0xc0

Definition at line 189 of file IceFPU.h.

◆ FCMOVNB_ST1

#define FCMOVNB_ST1 _asm _emit 0xdb _asm _emit 0xc1

Definition at line 194 of file IceFPU.h.

◆ FCMOVNB_ST2

#define FCMOVNB_ST2 _asm _emit 0xdb _asm _emit 0xc2

Definition at line 199 of file IceFPU.h.

◆ FCMOVNB_ST3

#define FCMOVNB_ST3 _asm _emit 0xdb _asm _emit 0xc3

Definition at line 204 of file IceFPU.h.

◆ FCMOVNB_ST4

#define FCMOVNB_ST4 _asm _emit 0xdb _asm _emit 0xc4

Definition at line 209 of file IceFPU.h.

◆ FCMOVNB_ST5

#define FCMOVNB_ST5 _asm _emit 0xdb _asm _emit 0xc5

Definition at line 214 of file IceFPU.h.

◆ FCMOVNB_ST6

#define FCMOVNB_ST6 _asm _emit 0xdb _asm _emit 0xc6

Definition at line 219 of file IceFPU.h.

◆ FCMOVNB_ST7

#define FCMOVNB_ST7 _asm _emit 0xdb _asm _emit 0xc7

Definition at line 224 of file IceFPU.h.

◆ FCOMI_ST0

#define FCOMI_ST0 _asm _emit 0xdb _asm _emit 0xf0

Definition at line 186 of file IceFPU.h.

◆ FCOMI_ST1

#define FCOMI_ST1 _asm _emit 0xdb _asm _emit 0xf1

Definition at line 191 of file IceFPU.h.

◆ FCOMI_ST2

#define FCOMI_ST2 _asm _emit 0xdb _asm _emit 0xf2

Definition at line 196 of file IceFPU.h.

◆ FCOMI_ST3

#define FCOMI_ST3 _asm _emit 0xdb _asm _emit 0xf3

Definition at line 201 of file IceFPU.h.

◆ FCOMI_ST4

#define FCOMI_ST4 _asm _emit 0xdb _asm _emit 0xf4

Definition at line 206 of file IceFPU.h.

◆ FCOMI_ST5

#define FCOMI_ST5 _asm _emit 0xdb _asm _emit 0xf5

Definition at line 211 of file IceFPU.h.

◆ FCOMI_ST6

#define FCOMI_ST6 _asm _emit 0xdb _asm _emit 0xf6

Definition at line 216 of file IceFPU.h.

◆ FCOMI_ST7

#define FCOMI_ST7 _asm _emit 0xdb _asm _emit 0xf7

Definition at line 221 of file IceFPU.h.

◆ FCOMIP_ST0

#define FCOMIP_ST0 _asm _emit 0xdf _asm _emit 0xf0

Definition at line 187 of file IceFPU.h.

◆ FCOMIP_ST1

#define FCOMIP_ST1 _asm _emit 0xdf _asm _emit 0xf1

Definition at line 192 of file IceFPU.h.

◆ FCOMIP_ST2

#define FCOMIP_ST2 _asm _emit 0xdf _asm _emit 0xf2

Definition at line 197 of file IceFPU.h.

◆ FCOMIP_ST3

#define FCOMIP_ST3 _asm _emit 0xdf _asm _emit 0xf3

Definition at line 202 of file IceFPU.h.

◆ FCOMIP_ST4

#define FCOMIP_ST4 _asm _emit 0xdf _asm _emit 0xf4

Definition at line 207 of file IceFPU.h.

◆ FCOMIP_ST5

#define FCOMIP_ST5 _asm _emit 0xdf _asm _emit 0xf5

Definition at line 212 of file IceFPU.h.

◆ FCOMIP_ST6

#define FCOMIP_ST6 _asm _emit 0xdf _asm _emit 0xf6

Definition at line 217 of file IceFPU.h.

◆ FCOMIP_ST7

#define FCOMIP_ST7 _asm _emit 0xdf _asm _emit 0xf7

Definition at line 222 of file IceFPU.h.

◆ FR

#define FR ( x ) ((float&)(x))

Floating-point representation of an integer value.

Definition at line 27 of file IceFPU.h.

◆ IR

#define IR ( x ) ((udword&)(x))

Integer representation of a floating-point value.

Definition at line 18 of file IceFPU.h.

◆ IS_NEGATIVE_FLOAT

#define IS_NEGATIVE_FLOAT ( x ) ((x)<0)

Integer-based comparison of a floating point value. Don't use it blindly, it can be faster or slower than the FPU comparison, depends on the context.

Definition at line 32 of file IceFPU.h.

◆ SIGN_BITMASK

#define SIGN_BITMASK 0x80000000

Definition at line 15 of file IceFPU.h.

◆ SIR

#define SIR ( x ) ((sdword&)(x))

Signed integer representation of a floating-point value.

Definition at line 21 of file IceFPU.h.

Enumeration Type Documentation

◆ FPUMode

enum FPUMode

Enumerator
FPU_FLOOR
FPU_CEIL
FPU_BEST
FPU_FORCE_DWORD

Definition at line 310 of file IceFPU.h.

Function Documentation

◆ ComputeFloatEpsilon()

inline_ float ComputeFloatEpsilon ( )

This function computes the slowest possible floating-point value (you can also directly use FLT_EPSILON)

Definition at line 174 of file IceFPU.h.

◆ ConvertToSortable()

inline_ int ConvertToSortable ( float f )

Definition at line 300 of file IceFPU.h.

◆ FastFabs()

inline_ float FastFabs ( float x )

Fast fabs for floating-point values. It just clears the sign bit. Don't use it blindy, it can be faster or slower than the FPU comparison, depends on the context.

Definition at line 36 of file IceFPU.h.

◆ FastSqrt()

inline_ float FastSqrt ( float square )

Fast square root for floating-point values.

Definition at line 43 of file IceFPU.h.

◆ FCMax2()

inline_ float FCMax2	(	float	a,
		float	b
	)

A global function to find MAX(a,b) using FCOMI/FCMOV.

Definition at line 227 of file IceFPU.h.

◆ FCMax3()

inline_ float FCMax3	(	float	a,
		float	b,
		float	c
	)

A global function to find MAX(a,b,c) using FCOMI/FCMOV.

Definition at line 261 of file IceFPU.h.

◆ FCMin2()

inline_ float FCMin2	(	float	a,
		float	b
	)

A global function to find MIN(a,b) using FCOMI/FCMOV.

Definition at line 244 of file IceFPU.h.

◆ FCMin3()

inline_ float FCMin3	(	float	a,
		float	b,
		float	c
	)

A global function to find MIN(a,b,c) using FCOMI/FCMOV.

Definition at line 281 of file IceFPU.h.

◆ fepsilon()

inline_ float fepsilon ( float f )

Returns the float ranged espilon value.

Definition at line 116 of file IceFPU.h.

◆ frsqrt()

inline_ float frsqrt ( float f )

Computes 1.0f / sqrtf(x).

Definition at line 69 of file IceFPU.h.

◆ fsat()

inline_ float fsat ( float f )

Saturates positive to zero.

Definition at line 62 of file IceFPU.h.

◆ fsqrt()

inline_ float fsqrt ( float f )

TO BE DOCUMENTED.

Definition at line 106 of file IceFPU.h.

◆ GetFPUMode()

FUNCTION ICECORE_API FPUMode GetFPUMode ( )

◆ intCeil()

FUNCTION ICECORE_API int intCeil ( const float & f )

◆ intChop()

FUNCTION ICECORE_API int intChop ( const float & f )

◆ intFloor()

FUNCTION ICECORE_API int intFloor ( const float & f )

◆ InvSqrt()

inline_ float InvSqrt ( const float & x )

Computes 1.0f / sqrtf(x). Comes from NVIDIA.

Definition at line 80 of file IceFPU.h.

◆ IsFloatZero()

inline_ bool IsFloatZero	(	float	x,
		float	epsilon = `1e-6f`
	)

Definition at line 181 of file IceFPU.h.

◆ IsIndeterminate()

inline_ bool IsIndeterminate ( float value )

Definition at line 127 of file IceFPU.h.

◆ IsMinusInf()

inline_ bool IsMinusInf ( float value )

Definition at line 129 of file IceFPU.h.

◆ IsNAN()

inline_ bool IsNAN ( float value )

Is the float valid ?

Definition at line 126 of file IceFPU.h.

◆ IsPlusInf()

inline_ bool IsPlusInf ( float value )

Definition at line 128 of file IceFPU.h.

◆ IsValidFloat()

inline_ bool IsValidFloat ( float value )

Definition at line 131 of file IceFPU.h.

◆ RestoreFPU()

FUNCTION ICECORE_API void RestoreFPU ( )

◆ RSqrt()

inline_ float RSqrt ( float number )

Computes 1.0f / sqrtf(x). Comes from Quake3. Looks like the first one I had above. See http://www.magic-software.com/3DGEDInvSqrt.html

Definition at line 89 of file IceFPU.h.

◆ SaveFPU()

FUNCTION ICECORE_API void SaveFPU ( )

◆ SetFPUBestMode()

FUNCTION ICECORE_API void SetFPUBestMode ( )

◆ SetFPUCeilMode()

FUNCTION ICECORE_API void SetFPUCeilMode ( )

◆ SetFPUFloorMode()

FUNCTION ICECORE_API void SetFPUFloorMode ( )

◆ SetFPUPrecision24()

FUNCTION ICECORE_API void SetFPUPrecision24 ( )

◆ SetFPUPrecision53()

FUNCTION ICECORE_API void SetFPUPrecision53 ( )

◆ SetFPUPrecision64()

FUNCTION ICECORE_API void SetFPUPrecision64 ( )

◆ SetFPURoundingChop()

FUNCTION ICECORE_API void SetFPURoundingChop ( )

◆ SetFPURoundingDown()

FUNCTION ICECORE_API void SetFPURoundingDown ( )

◆ SetFPURoundingNear()

FUNCTION ICECORE_API void SetFPURoundingNear ( )

◆ SetFPURoundingUp()

FUNCTION ICECORE_API void SetFPURoundingUp ( )

Macros

Enumerations

Functions