math.h File Reference

hardware coprocessor instructions More...

#include "nds/ndstypes.h"

Functions
void	crossf32 (int32 *a, int32 *b, int32 *result)
	1.19.12 fixed point cross product function result = AxB
int32	div32 (int32 num, int32 den)
	integer divide
int32	div64 (int64 num, int32 den)
	integer 64 bit divide
int32	divf32 (int32 num, int32 den)
	Fixed point divide.
int32	dotf32 (int32 *a, int32 *b)
	1.19.12 fixed point dot product function result = A dot B
int32	mod32 (int32 num, int32 den)
	integer modulous
int32	mod64 (int64 num, int32 den)
	integer 64 bit modulous
int32	mulf32 (int32 a, int32 b)
	Fixed point multiply.
void	normalizef32 (int32 *a)
	1.19.12 fixed point normalize function A = A / |A|
u32	sqrt32 (int a)
	integer sqrt
u32	sqrt64 (long long a)
	integer sqrt
int32	sqrtf32 (int32 a)
	Fixed point sqrt.

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Detailed Description

hardware coprocessor instructions

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Function Documentation

static void crossf32	(	int32 *	a,
		int32 *	b,
		int32 *	result
	)			[inline]

1.19.12 fixed point cross product function result = AxB

Parameters:

	a	pointer to fixed 3x3 matrix
	b	pointer to fixed 3x3 matrix
	result	pointer to fixed 3x3 matrix Cross product x = Ay * Bz - By * Az y = Az * Bx - Bz * Ax z = Ax * By - Bx * Ay

static int32 div32	(	int32	num,
		int32	den
	)			[inline]

integer divide

Parameters:

	num	numerator
	den	denominator

Returns:

returns 32 bit integer result

static int32 div64	(	int64	num,
		int32	den
	)			[inline]

integer 64 bit divide

Parameters:

	num	64 bit numerator
	den	32 bit denominator

Returns:

returns 32 bit integer result

static divf32	(	int32	num,
		int32	den
	)			[inline]

Fixed point divide.

Parameters:

	num	Takes 20.12 numerator and denominator
	den	Takes 20.12 numerator and denominator

Returns:

returns 20.12 result

static int32 dotf32	(	int32 *	a,
		int32 *	b
	)			[inline]

1.19.12 fixed point dot product function result = A dot B

Parameters:

	a	pointer to fixed 3x3 matrix
	b	pointer to fixed 3x3 matrix

Returns:

32 bit integer result Dot Product result = Ax * Bx + Ay * By + Az * Bz

static int32 mod32	(	int32	num,
		int32	den
	)			[inline]

integer modulous

Parameters:

	num	numerator
	den	denominator

Returns:

returns 32 bit integer remainder

static int32 mod64	(	int64	num,
		int32	den
	)			[inline]

integer 64 bit modulous

Parameters:

	num	64 bit numerator
	den	32 bit denominator

Returns:

returns 32 bit integer remainder

static static int32 mulf32	(	int32	a,
		int32	b
	)			[inline]

Fixed point multiply.

Parameters:

	a	Takes 20.12
	b	Takes 20.12

Returns:

returns 20.12 result

static void normalizef32

(

int32 *

a

)

[inline]

1.19.12 fixed point normalize function A = A / |A|

Parameters:

a

pointer to fixed 3x3 matrix Normalize Ax = Ax / mag Ay = Ay / mag Az = Az / mag

static int32 sqrt32

(

int

a

)

[inline]

integer sqrt

Parameters:

a

32 bit integer argument

Returns:

returns 32 bit integer result

static int32 sqrt64

(

long long

a

)

[inline]

integer sqrt

Parameters:

a

64 bit integer argument

Returns:

returns 32 bit integer result

static int32 sqrtf32

(

int32

a

)

[inline]

Fixed point sqrt.

Parameters:

a

Takes 20.12

Returns:

returns 20.12 result