math.h File Reference

Architecture-specific math function calls. More...

#include "pxr/arch/pxr.h"
#include "pxr/arch/defines.h"
#include "pxr/arch/inttypes.h"
#include <cmath>

Go to the source code of this file.

Namespaces
namespace	pxr

Macros
#define	M_PI   3.14159265358979323846
#define	ARCH_MIN_FLOAT_EPS_SQR   0.000244141F
	This is the smallest value e such that 1+e^2 == 1, using floats.

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

Detailed Description

Architecture-specific math function calls.

Macro Definition Documentation

M_PI

#define M_PI   3.14159265358979323846

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.