math.h

hardware coprocessor instructions [詳細]

#include "nds/ndstypes.h"

ソースコードを見る。

マクロ定義
#define	REG_DIVCNT   (*(vu16*)(0x04000280))
#define	REG_DIV_NUMER   (*(vs64*) (0x04000290))
#define	REG_DIV_NUMER_L   (*(vs32*) (0x04000290))
#define	REG_DIV_NUMER_H   (*(vs32*) (0x04000294))
#define	REG_DIV_DENOM   (*(vs64*) (0x04000298))
#define	REG_DIV_DENOM_L   (*(vs32*) (0x04000298))
#define	REG_DIV_DENOM_H   (*(vs32*) (0x0400029C))
#define	REG_DIV_RESULT   (*(vs64*) (0x040002A0))
#define	REG_DIV_RESULT_L   (*(vs32*) (0x040002A0))
#define	REG_DIV_RESULT_H   (*(vs32*) (0x040002A4))
#define	REG_DIVREM_RESULT   (*(vs64*) (0x040002A8))
#define	REG_DIVREM_RESULT_L   (*(vs32*) (0x040002A8))
#define	REG_DIVREM_RESULT_H   (*(vs32*) (0x040002AC))
#define	REG_SQRTCNT   (*(vu16*)(0x040002B0))
#define	REG_SQRT_PARAM   (*(vs64*) (0x040002B8))
#define	REG_SQRT_PARAM_L   (*(vs32*) (0x040002B8))
#define	REG_SQRT_PARAM_H   (*(vs32*) (0x040002BC))
#define	REG_SQRT_RESULT   (*(vu32*) (0x040002B4))
#define	DIV_64_64   2
#define	DIV_64_32   1
#define	DIV_32_32   0
#define	DIV_BUSY   (1<<15)
#define	SQRT_64   1
#define	SQRT_32   0
#define	SQRT_BUSY   (1<<15)
関数
int32	divf32 (int32 num, int32 den)
int32	mulf32 (int32 a, int32 b)
	Fixed point multiply.
int32	sqrtf32 (int32 a)
	Fixed point sqrt.
int32	div32 (int32 num, int32 den)
	integer divide
int32	mod32 (int32 num, int32 den)
	integer modulous
int32	div64 (int64 num, int32 den)
	integer 64 bit divide
int32	mod64 (int64 num, int32 den)
	integer 64 bit modulous
u32	sqrt32 (int a)
	integer sqrt
u32	sqrt64 (long long a)
	integer sqrt
void	crossf32 (int32 *a, int32 *b, int32 *result)
	1.19.12 fixed point cross product function result = AxB
int32	dotf32 (int32 *a, int32 *b)
	1.19.12 fixed point dot product function result = A dot B
void	normalizef32 (int32 *a)
	1.19.12 fixed point normalize function A = A / |A|

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説明

hardware coprocessor instructions

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関数

STATIC_INLvoid crossf32	(	int32 *	a,
		int32 *	b,
		int32 *	result
	)

1.19.12 fixed point cross product function result = AxB

引数:

	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_INLint32 div32	(	int32	num,
		int32	den
	)

integer divide

引数:

	num	numerator
	den	denominator

戻り値:

returns 32 bit integer result

STATIC_INLint32 div64	(	int64	num,
		int32	den
	)

integer 64 bit divide

引数:

	num	64 bit numerator
	den	32 bit denominator

戻り値:

returns 32 bit integer result

STATIC_INLint32 dotf32	(	int32 *	a,
		int32 *	b
	)

1.19.12 fixed point dot product function result = A dot B

引数:

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

戻り値:

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

STATIC_INLint32 mod32	(	int32	num,
		int32	den
	)

integer modulous

引数:

	num	numerator
	den	denominator

戻り値:

returns 32 bit integer remainder

STATIC_INLint32 mod64	(	int64	num,
		int32	den
	)

integer 64 bit modulous

引数:

	num	64 bit numerator
	den	32 bit denominator

戻り値:

returns 32 bit integer remainder

STATIC_INLstatic int32 mulf32	(	int32	a,
		int32	b
	)

Fixed point multiply.

引数:

	a	Takes 20.12
	b	Takes 20.12

戻り値:

returns 20.12 result

STATIC_INLvoid normalizef32

(

int32 *

a

)

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

引数:

a

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

STATIC_INLint32 sqrt32

(

int

a

)

integer sqrt

引数:

a

32 bit integer argument

戻り値:

returns 32 bit integer result

STATIC_INLint32 sqrt64

(

long long

a

)

integer sqrt

引数:

a

64 bit integer argument

戻り値:

returns 32 bit integer result

STATIC_INLint32 sqrtf32

(

int32

a

)

Fixed point sqrt.

引数:

a

Takes 20.12

戻り値:

returns 20.12 result