fmath.h File Reference

Inline functions for the DC's special math instructions. More...

#include <sys/cdefs.h>
#include <arch/types.h>

Go to the source code of this file.

Macros
#define	F_PI   3.1415926f

Functions
float	fipr (float x, float y, float z, float w, float a, float b, float c, float d)
float	fipr_magnitude_sqr (float x, float y, float z, float w)
	Floating point inner product w/self (square of vector magnitude)
float	fsin (float r)
	Floating point sine.
float	fcos (float r)
	Floating point cosine.
float	ftan (float r)
	Floating point tangent.
float	fisin (int d)
	Integer sine.
float	ficos (int d)
	Integer cosine.
float	fitan (int d)
	Integer tangent.
float	fsqrt (float f)
	Floating point square root.
float	frsqrt (float f)

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Detailed Description

Inline functions for the DC's special math instructions.

Author:

Andrew Kieschnick

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Macro Definition Documentation

#define F_PI   3.1415926f

PI constant (if you don't want full math.h)

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Function Documentation

float fcos ( float  r )

inline

Floating point cosine.

Parameters:

r	a floating point number between 0 and 2*PI

Returns:

cos(r), where r is [0..2*PI]

float ficos ( int  d )

inline

Integer cosine.

Parameters:

d	an integer between 0 and 65535

Returns:

cos(d), where d is [0..65535]

float fipr ( float  x, float  y, float  z, float  w, float  a, float  b, float  c, float  d  )

inline

Returns:

v1 dot v2 (inner product)

float fipr_magnitude_sqr ( float  x, float  y, float  z, float  w  )

inline

Floating point inner product w/self (square of vector magnitude)

Returns:

v1 dot v1 (square of magnitude)

float fisin ( int  d )

inline

Integer sine.

Parameters:

d	an integer between 0 and 65535

Returns:

sin(d), where d is [0..65535]

float fitan ( int  d )

inline

Integer tangent.

Parameters:

d	an integer between 0 and 65535

Returns:

tan(d), where d is [0..65535]

float frsqrt ( float  f )

inline

Returns:

1.0f / sqrt(f)

float fsin ( float  r )

inline

Floating point sine.

Parameters:

r	a floating point number between 0 and 2*PI

Returns:

sin(r), where r is [0..2*PI]

float fsqrt ( float  f )

inline

Floating point square root.

Returns:

sqrt(f)

float ftan ( float  r )

inline

Floating point tangent.

Parameters:

r	a floating point number between 0 and 2*PI

Returns:

tan(r), where r is [0..2*PI]