fpmath.h File Reference

#include <stdint.h>
#include <limits.h>

Go to the source code of this file.

Macros
#define	CSS_RADIX_POINT   10
#define	FADD(a, b)   (css_add_fixed((a), (b)))
#define	FSUB(a, b)   (css_subtract_fixed((a), (b)))
#define	FMUL(a, b)   (css_multiply_fixed((a), (b)))
#define	FDIV(a, b)   (css_divide_fixed((a), (b)))
#define	FLTTOFIX(a)   ((css_fixed) ((a) * (float) (1 << CSS_RADIX_POINT)))
#define	FIXTOFLT(a)   ((float) (a) / (float) (1 << CSS_RADIX_POINT))
#define	INTTOFIX(a)   (css_int_to_fixed(a))
#define	FIXTOINT(a)   ((a) >> CSS_RADIX_POINT)
#define	TRUNCATEFIX(a)   (a & ~((1 << CSS_RADIX_POINT)- 1 ))
#define	FIXFRAC(a)   (a & ((1 << CSS_RADIX_POINT)- 1 ))
#define	F_PI_2   0x00000648 /* 1.5708 (PI/2) */
#define	F_PI   0x00000c91 /* 3.1415 (PI) */
#define	F_3PI_2   0x000012d9 /* 4.7124 (3PI/2) */
#define	F_2PI   0x00001922 /* 6.2831 (2 PI) */
#define	F_90   0x00016800 /* 90 */
#define	F_180   0x0002d000 /* 180 */
#define	F_270   0x00043800 /* 270 */
#define	F_360   0x0005a000 /* 360 */
#define	F_0_5   0x00000200 /* 0.5 */
#define	F_1   0x00000400 /* 1 */
#define	F_10   0x00002800 /* 10 */
#define	F_72   0x00012000 /* 72 */
#define	F_96   0x00018000 /* 96 */
#define	F_100   0x00019000 /* 100 */
#define	F_200   0x00032000 /* 200 */
#define	F_255   0x0003FC00 /* 255 */
#define	F_300   0x0004b000 /* 300 */
#define	F_400   0x00064000 /* 400 */
#define	FPCT_OF_INT_TOINT(p, i)   (FIXTOINT(FDIV((p * i), F_100)))

Typedefs
typedef int32_t	css_fixed

Macro Definition Documentation

CSS_RADIX_POINT

#define CSS_RADIX_POINT   10

F_0_5

#define F_0_5   0x00000200 /* 0.5 */

F_1

#define F_1   0x00000400 /* 1 */

F_10

#define F_10   0x00002800 /* 10 */

F_100

#define F_100   0x00019000 /* 100 */

F_180

#define F_180   0x0002d000 /* 180 */

F_200

#define F_200   0x00032000 /* 200 */

F_255

#define F_255   0x0003FC00 /* 255 */

F_270

#define F_270   0x00043800 /* 270 */

F_2PI

#define F_2PI   0x00001922 /* 6.2831 (2 PI) */

F_300

#define F_300   0x0004b000 /* 300 */

F_360

#define F_360   0x0005a000 /* 360 */

F_3PI_2

#define F_3PI_2   0x000012d9 /* 4.7124 (3PI/2) */

F_400

#define F_400   0x00064000 /* 400 */

F_72

#define F_72   0x00012000 /* 72 */

F_90

#define F_90   0x00016800 /* 90 */

F_96

#define F_96   0x00018000 /* 96 */

F_PI

#define F_PI   0x00000c91 /* 3.1415 (PI) */

F_PI_2

#define F_PI_2   0x00000648 /* 1.5708 (PI/2) */

FADD

#define FADD	(		a,
			b
	)		(css_add_fixed((a), (b)))

FDIV

#define FDIV	(		a,
			b
	)		(css_divide_fixed((a), (b)))

FIXFRAC

#define FIXFRAC

(

a

)

(a & ((1 << CSS_RADIX_POINT)- 1 ))

FIXTOFLT

#define FIXTOFLT

(

a

)

((float) (a) / (float) (1 << CSS_RADIX_POINT))

FIXTOINT

#define FIXTOINT

(

a

)

((a) >> CSS_RADIX_POINT)

FLTTOFIX

#define FLTTOFIX

(

a

)

((css_fixed) ((a) * (float) (1 << CSS_RADIX_POINT)))

FMUL

#define FMUL	(		a,
			b
	)		(css_multiply_fixed((a), (b)))

FPCT_OF_INT_TOINT

#define FPCT_OF_INT_TOINT	(		p,
			i
	)		(FIXTOINT(FDIV((p * i), F_100)))

FSUB

#define FSUB	(		a,
			b
	)		(css_subtract_fixed((a), (b)))

INTTOFIX

#define INTTOFIX

(

a

)

(css_int_to_fixed(a))

TRUNCATEFIX

#define TRUNCATEFIX

(

a

)

(a & ~((1 << CSS_RADIX_POINT)- 1 ))

Typedef Documentation

css_fixed

typedef int32_t css_fixed