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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.

## ◆ 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.

## ◆ 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.