math.h File Reference

hardware coprocessor math instructions. More...

#include "nds/ndstypes.h"

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

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Detailed Description

hardware coprocessor math instructions.

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Function Documentation

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

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, static]

integer divide

Parameters:

num	numerator
den	denominator

Returns:

returns 32 bit integer result

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

integer 64 bit divide

Parameters:

num	64 bit numerator
den	32 bit denominator

Returns:

returns 32 bit integer result

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

Fixed point divide.

Parameters:

num	Takes 20.12 numerator.
den	Takes 20.12 denominator.

Returns:

returns 20.12 result.

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

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, static]

integer modulous

Parameters:

num	numerator
den	denominator

Returns:

returns 32 bit integer remainder

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

integer 64 bit modulous

Parameters:

num	64 bit numerator
den	32 bit denominator

Returns:

returns 32 bit integer remainder

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

Fixed point multiply.

Parameters:

a	Takes 20.12
b	Takes 20.12

Returns:

returns 20.12 result

static void normalizef32

(

int32 *

a

)

[inline, static]

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 u32 sqrt32

(

int

a

)

[inline, static]

integer sqrt

Parameters:

a	32 bit integer argument

Returns:

returns 32 bit integer result

static u32 sqrt64

(

long long

a

)

[inline, static]

integer sqrt

Parameters:

a	64 bit integer argument

Returns:

returns 32 bit integer result

static int32 sqrtf32

(

int32

a

)

[inline, static]

Fixed point sqrt.

Parameters:

a	Takes 20.12

Returns:

returns 20.12 result