Math

Functions for math. More...

Files
file	math.h
	Architecture-specific math function calls.

Macros
#define	ARCH_MIN_FLOAT_EPS_SQR   0.000244141F
	This is the smallest value e such that 1+e^2 == 1, using floats.

Functions
long	ArchSign (long val)
	Three-valued sign. Return 1 if val > 0, 0 if val == 0, or -1 if val < 0.
uint32_t	ArchFloatToBitPattern (float v)
	Returns The IEEE-754 bit pattern of the specified single precision value as a 32-bit unsigned integer.
float	ArchBitPatternToFloat (uint32_t v)
	Returns The single precision floating point value corresponding to the given IEEE-754 bit pattern.
uint64_t	ArchDoubleToBitPattern (double v)
	Returns The IEEE-754 bit pattern of the specified double precision value as a 64-bit unsigned integer.
double	ArchBitPatternToDouble (uint64_t v)
	Returns The double precision floating point value corresponding to the given IEEE-754 bit pattern.
void	ArchSinCosf (float v, float *s, float *c)
	Computes the sine and cosine of the specified value as a float.
void	ArchSinCos (double v, double *s, double *c)
	Computes the sine and cosine of the specified value as a double.
int	ArchCountTrailingZeros (uint64_t x)
	Return the number of consecutive 0-bits in x starting from the least significant bit position.

Detailed Description

Functions for math.

Macro Definition Documentation

ARCH_MIN_FLOAT_EPS_SQR

#define ARCH_MIN_FLOAT_EPS_SQR   0.000244141F

This is the smallest value e such that 1+e^2 == 1, using floats.

True for all IEEE754 chipsets.

Definition at line 53 of file math.h.

Function Documentation

ArchBitPatternToDouble()

double ArchBitPatternToDouble ( uint64_t  v )

inline

Returns The double precision floating point value corresponding to the given IEEE-754 bit pattern.

Definition at line 95 of file math.h.

ArchBitPatternToFloat()

float ArchBitPatternToFloat ( uint32_t  v )

inline

Returns The single precision floating point value corresponding to the given IEEE-754 bit pattern.

Definition at line 73 of file math.h.

ArchCountTrailingZeros()

int ArchCountTrailingZeros ( uint64_t  x )

inline

Return the number of consecutive 0-bits in x starting from the least significant bit position.

If x is 0, the result is undefined.

Definition at line 135 of file math.h.

ArchDoubleToBitPattern()

uint64_t ArchDoubleToBitPattern ( double  v )

inline

Returns The IEEE-754 bit pattern of the specified double precision value as a 64-bit unsigned integer.

Definition at line 84 of file math.h.

ArchFloatToBitPattern()

uint32_t ArchFloatToBitPattern ( float  v )

inline

Returns The IEEE-754 bit pattern of the specified single precision value as a 32-bit unsigned integer.

Definition at line 62 of file math.h.

ArchSign()

long ArchSign ( long  val )

inline

Three-valued sign. Return 1 if val > 0, 0 if val == 0, or -1 if val < 0.

Definition at line 56 of file math.h.

ArchSinCos()

void ArchSinCos ( double  v, double *  s, double *  c  )

inline

Computes the sine and cosine of the specified value as a double.

Definition at line 114 of file math.h.

ArchSinCosf()

void ArchSinCosf ( float  v, float *  s, float *  c  )

inline

Computes the sine and cosine of the specified value as a float.

Definition at line 111 of file math.h.