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_t a, int32_t b, int32_t *result)
	20.12 fixed point cross product. More...

static int32_t	div32 (int32_t num, int32_t den)
	Integer divide. More...

static void	div32_asynch (int32_t num, int32_t den)
	Asynchronous integer divide start. More...

static int32_t	div32_result (void)
	Asynchronous integer divide result. More...

static int32_t	div64 (int64_t num, int32_t den)
	Integer 64 bit divide. More...

static void	div64_asynch (int64_t num, int32_t den)
	Asynchronous integer 64 bit divide start. More...

static int32_t	div64_result (void)
	Asynchronous integer 64 bit divide result. More...

static int32_t	divf32 (int32_t num, int32_t den)
	Fixed point divide. More...

static void	divf32_asynch (int32_t num, int32_t den)
	Asynchronous fixed point divide start. More...

static int32_t	divf32_result (void)
	Asynchronous fixed point divide result. More...

static int32_t	dotf32 (int32_t a, int32_t b)
	20.12 fixed point dot product. More...

ARM_CODE float	hw_sqrtf (float x)
	32-bit floating point sqrt More...

static int32_t	mod32 (int32_t num, int32_t den)
	Integer modulo. More...

static void	mod32_asynch (int32_t num, int32_t den)
	Asynchronous integer modulo start. More...

static int32_t	mod32_result (void)
	Asynchronous integer modulo result. More...

static int32_t	mod64 (int64_t num, int32_t den)
	Integer 64 bit modulo. More...

static void	mod64_asynch (int64_t num, int32_t den)
	Asynchronous integer 64 bit modulo start. More...

static int32_t	mod64_result (void)
	Asynchronous integer 64 bit modulo result. More...

static int32_t	mulf32 (int32_t a, int32_t b)
	Fixed point multiply. More...

static void	normalizef32 (int32_t *a)
	20.12 fixed point normalize (set magnitude to 1.0 and keep the direction). More...

static uint32_t	sqrt32 (uint32_t a)
	32-bit integer sqrt. More...

static void	sqrt32_asynch (uint32_t a)
	Asynchronous 32-bit integer sqrt start. More...

static uint32_t	sqrt32_result (void)
	Asynchronous 32-bit integer sqrt result. More...

static uint32_t	sqrt64 (uint64_t a)
	64-bit integer sqrt. More...

static void	sqrt64_asynch (uint64_t a)
	Asynchronous 64-bit integer sqrt start. More...

static uint32_t	sqrt64_result (void)
	Asynchronous 64-bit integer sqrt result. More...

static int32_t	sqrtf32 (int32_t a)
	Fixed point sqrt. More...

static void	sqrtf32_asynch (int32_t a)
	Asynchronous fixed point sqrt start. More...

static int32_t	sqrtf32_result (void)
	Asynchronous fixed point sqrt result. More...

Detailed Description

hardware coprocessor math instructions.

Function Documentation

◆ crossf32()

static void crossf32	(	int32_t *	a,
		int32_t *	b,
		int32_t *	result
	)

inlinestatic

20.12 fixed point cross product.

Cross product:

result = A x B

x = Ay * Bz - By * Az
y = Az * Bx - Bz * Ax
z = Ax * By - Bx * Ay

Parameters

a	Pointer to fixed 3 dimensions vector.
b	Pointer to fixed 3 dimensions vector.
result	Result pointer to fixed 3x3 matrix

◆ div32()

static int32_t div32	(	int32_t	num,
		int32_t	den
	)

inlinestatic

Integer divide.

Parameters

num	Numerator.
den	Denominator.

Returns: 32 bit integer result.

◆ div32_asynch()

static void div32_asynch	(	int32_t	num,
		int32_t	den
	)

inlinestatic

Asynchronous integer divide start.

Parameters

num	Numerator.
den	Denominator.

◆ div32_result()

static int32_t div32_result ( void )

inlinestatic

Asynchronous integer divide result.

Returns: 32 bit integer result.

◆ div64()

static int32_t div64	(	int64_t	num,
		int32_t	den
	)

inlinestatic

Integer 64 bit divide.

Parameters

num	64 bit numerator.
den	32 bit denominator.

Returns: 32 bit integer result.

◆ div64_asynch()

static void div64_asynch	(	int64_t	num,
		int32_t	den
	)

inlinestatic

Asynchronous integer 64 bit divide start.

Parameters

num	64 bit numerator.
den	32 bit denominator.

◆ div64_result()

static int32_t div64_result ( void )

inlinestatic

Asynchronous integer 64 bit divide result.

Returns: 32 bit integer result.

◆ divf32()

static int32_t divf32	(	int32_t	num,
		int32_t	den
	)

inlinestatic

Fixed point divide.

Parameters

num	20.12 numerator.
den	20.12 denominator.

Returns: returns 20.12 result.

◆ divf32_asynch()

static void divf32_asynch	(	int32_t	num,
		int32_t	den
	)

inlinestatic

Asynchronous fixed point divide start.

Parameters

num	20.12 numerator.
den	20.12 denominator.

◆ divf32_result()

static int32_t divf32_result ( void )

inlinestatic

Asynchronous fixed point divide result.

Returns: returns 20.12 result.

◆ dotf32()

static int32_t dotf32	(	int32_t *	a,
		int32_t *	b
	)

inlinestatic

20.12 fixed point dot product.

Dot Product:

Result = Ax * Bx + Ay * By + Az * Bz

Parameters

a	Pointer to fixed 3 dimensions vector.
b	Pointer to fixed 3 dimensions vector.

Returns: 32 bit integer result

◆ hw_sqrtf()

ARM_CODE float hw_sqrtf ( float x )

32-bit floating point sqrt

Warning: Subnormal floats are treated as if they were zero.; Not safe to call inside an interrupt handler.

Parameters

x	Valid 32 bit non-negative floating point value.

Returns: 32 bit floating point value

◆ mod32()

static int32_t mod32	(	int32_t	num,
		int32_t	den
	)

inlinestatic

Integer modulo.

Parameters

num	Numerator.
den	Denominator.

Returns: 32 bit integer remainder.

◆ mod32_asynch()

static void mod32_asynch	(	int32_t	num,
		int32_t	den
	)

inlinestatic

Asynchronous integer modulo start.

Parameters

num	Numerator.
den	Denominator.

◆ mod32_result()

static int32_t mod32_result ( void )

inlinestatic

Asynchronous integer modulo result.

Returns: 32 bit integer remainder.

◆ mod64()

static int32_t mod64	(	int64_t	num,
		int32_t	den
	)

inlinestatic

Integer 64 bit modulo.

Parameters

num	64 bit numerator.
den	32 bit denominator.

Returns: returns 32 bit integer remainder.

◆ mod64_asynch()

static void mod64_asynch	(	int64_t	num,
		int32_t	den
	)

inlinestatic

Asynchronous integer 64 bit modulo start.

Parameters

num	64 bit numerator.
den	32 bit denominator.

◆ mod64_result()

static int32_t mod64_result ( void )

inlinestatic

Asynchronous integer 64 bit modulo result.

Returns: returns 32 bit integer remainder.

◆ mulf32()

static int32_t mulf32	(	int32_t	a,
		int32_t	b
	)

inlinestatic

Fixed point multiply.

Parameters

a	20.12 value.
b	20.12 value.

Returns: returns 20.12 result.

◆ normalizef32()

static void normalizef32 ( int32_t * a )

inlinestatic

20.12 fixed point normalize (set magnitude to 1.0 and keep the direction).

Parameters

a	Pointer to the vector to normalize.

◆ sqrt32()

static uint32_t sqrt32 ( uint32_t a )

inlinestatic

32-bit integer sqrt.

Parameters

a	32 bit positive integer value.

Returns: 32 bit integer result.

◆ sqrt32_asynch()

static void sqrt32_asynch ( uint32_t a )

inlinestatic

Asynchronous 32-bit integer sqrt start.

Parameters

a	32 bit positive integer value.

◆ sqrt32_result()

static uint32_t sqrt32_result ( void )

inlinestatic

Asynchronous 32-bit integer sqrt result.

Returns: 32 bit integer result.

◆ sqrt64()

static uint32_t sqrt64 ( uint64_t a )

inlinestatic

64-bit integer sqrt.

Parameters

a	64 bit positive integer value.

Returns: 32 bit integer result.

◆ sqrt64_asynch()

static void sqrt64_asynch ( uint64_t a )

inlinestatic

Asynchronous 64-bit integer sqrt start.

Parameters

a	64 bit positive integer value.

◆ sqrt64_result()

static uint32_t sqrt64_result ( void )

inlinestatic

Asynchronous 64-bit integer sqrt result.

Returns: 32 bit integer result.

◆ sqrtf32()

static int32_t sqrtf32 ( int32_t a )

inlinestatic

Fixed point sqrt.

Parameters

a	20.12 positive value.

Returns: 20.12 result.

◆ sqrtf32_asynch()

static void sqrtf32_asynch ( int32_t a )

inlinestatic

Asynchronous fixed point sqrt start.

Parameters

a	20.12 positive value.

◆ sqrtf32_result()

static int32_t sqrtf32_result ( void )

inlinestatic

Asynchronous fixed point sqrt result.

Returns: 20.12 result.

Macros

Functions

Detailed Description

Function Documentation

◆ crossf32()

◆ div32()

◆ div32_asynch()

◆ div32_result()

◆ div64()

◆ div64_asynch()

◆ div64_result()

◆ divf32()

◆ divf32_asynch()

◆ divf32_result()

◆ dotf32()

◆ hw_sqrtf()

◆ mod32()

◆ mod32_asynch()

◆ mod32_result()

◆ mod64()

◆ mod64_asynch()

◆ mod64_result()

◆ mulf32()

◆ normalizef32()

◆ sqrt32()

◆ sqrt32_asynch()

◆ sqrt32_result()

◆ sqrt64()

◆ sqrt64_asynch()

◆ sqrt64_result()

◆ sqrtf32()

◆ sqrtf32_asynch()

◆ sqrtf32_result()