hardware coprocessor math instructions. More...

#include "nds/ndstypes.h"

Macros
#define	f32tofloat(n) (((float)(n)) / (float)(1<<12))
	convert f32 to float

#define	f32toint(n) ((n) / (1 << 12))
	convert f32 to int

#define	floattof32(n) ((int)((n) * (1 << 12)))
	convert float to f32

#define	inttof32(n) ((n) * (1 << 12))
	convert int to f32

Functions
static void	crossf32 (int32 a, int32 b, int32 *result)
	20.12 fixed point cross product function result = AxB More...

static int32	div32 (int32 num, int32 den)
	integer divide More...

static int32	div64 (int64 num, int32 den)
	integer 64 bit divide More...

static int32	divf32 (int32 num, int32 den)
	Fixed point divide. More...

static int32	dotf32 (int32 a, int32 b)
	20.12 fixed point dot product function result = A dot B More...

static int32	mod32 (int32 num, int32 den)
	integer modulous More...

static int32	mod64 (int64 num, int32 den)
	integer 64 bit modulous More...

static int32	mulf32 (int32 a, int32 b)
	Fixed point multiply. More...

static void	normalizef32 (int32 *a)
	20.12 fixed point normalize function A = A / \|A\| More...

static u32	sqrt32 (int a)
	integer sqrt More...

static u32	sqrt64 (long long a)
	integer sqrt More...

static int32	sqrtf32 (int32 a)
	Fixed point sqrt. More...

Detailed Description

hardware coprocessor math instructions.

Function Documentation

static void crossf32	(	int32 *	a,
		int32 *	b,
		int32 *	result
	)

inlinestatic

20.12 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
	)

inlinestatic

integer divide

Parameters

num	numerator
den	denominator

Returns: returns 32 bit integer result

static int32 div64	(	int64	num,
		int32	den
	)

inlinestatic

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
	)

inlinestatic

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
	)

inlinestatic

20.12 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
	)

inlinestatic

integer modulous

Parameters

num	numerator
den	denominator

Returns: returns 32 bit integer remainder

static int32 mod64	(	int64	num,
		int32	den
	)

inlinestatic

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
	)

inlinestatic

Fixed point multiply.

Parameters

a	Takes 20.12
b	Takes 20.12

Returns: returns 20.12 result

static void normalizef32 ( int32 * a )

inlinestatic

20.12 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 )

inlinestatic

integer sqrt

Parameters

a	32 bit integer argument

Returns: returns 32 bit integer result

static u32 sqrt64 ( long long a )

inlinestatic

integer sqrt

Parameters

a	64 bit integer argument

Returns: returns 32 bit integer result

static int32 sqrtf32 ( int32 a )

inlinestatic

Fixed point sqrt.

Parameters

a	Takes 20.12

Returns: returns 20.12 result

Macros

Functions

Detailed Description

Function Documentation