a0092593c9
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22303 a1c6a512-1295-4272-9138-f99709370657
24 lines
917 B
C
24 lines
917 B
C
#include <stdlib.h>
|
|
#ifdef ROCKBOX
|
|
#include "asm_arm.h"
|
|
#include "asm_mcf5249.h"
|
|
#include "codeclib_misc.h"
|
|
#endif
|
|
|
|
/* Macros for converting between various fixed-point representations and floating point. */
|
|
#define ONE_16 (1L << 16)
|
|
#define fixtof64(x) (float)((float)(x) / (float)(1 << 16)) //does not work on int64_t!
|
|
#define ftofix32(x) ((int32_t)((x) * (float)(1 << 16) + ((x) < 0 ? -0.5 : 0.5)))
|
|
#define ftofix31(x) ((int32_t)((x) * (float)(1 << 31) + ((x) < 0 ? -0.5 : 0.5)))
|
|
#define fix31tof64(x) (float)((float)(x) / (float)(1 << 31))
|
|
|
|
/* Fixed point math routines for use in atrac3.c */
|
|
#ifdef ROCKBOX
|
|
#define fixmul31(x,y) (MULT31(x,y))
|
|
#define fixmul16(x,y) (MULT32(x,y))
|
|
#else
|
|
inline int32_t fixmul16(int32_t x, int32_t y);
|
|
inline int32_t fixmul31(int32_t x, int32_t y);
|
|
#endif /* ROCKBOX */
|
|
inline int32_t fixdiv16(int32_t x, int32_t y);
|
|
inline int32_t fastSqrt(int32_t n);
|