46 lines
1.3 KiB
C
Executable File
46 lines
1.3 KiB
C
Executable File
#pragma once
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <fixpoint/ieee.h>
|
|
|
|
/** \file */
|
|
/** \defgroup fixpoint <fixpoint/fp248.h>: 24/8bit Fixpoint Support
|
|
\code
|
|
#include <fixpoint/fp248.h>
|
|
\endcode
|
|
|
|
Function
|
|
*/
|
|
|
|
typedef int32_t fp248_t;
|
|
|
|
|
|
#define FP248_FRAC 8
|
|
#define FP248_MASK (0xFFFFFFFF >> (32-FP248_FRAC))
|
|
|
|
float fp248_to_float (fp248_t value);
|
|
fp248_t fp248_from_float (float value);
|
|
|
|
static inline fp248_t fp248_from_int32 (int32_t value) { return (fp248_t)(value << FP248_FRAC); };
|
|
static inline int32_t fp248_to_int32 (fp248_t value) { return (int32_t)(value >> FP248_FRAC); };
|
|
static inline fp248_t fp248_fraction (fp248_t value) { return value & FP248_MASK; };
|
|
|
|
static inline fp248_t fp248_add ( fp248_t a, fp248_t b ) { return a + b; };
|
|
static inline fp248_t fp248_sub ( fp248_t a, fp248_t b ) { return a - b; };
|
|
static inline fp248_t fp248_mul ( fp248_t a, fp248_t b ) { return (fp248_t)( ((int64_t)a * (int64_t)b) >> FP248_FRAC ); };
|
|
static inline fp248_t fp248_div ( fp248_t a, fp248_t b ) { return (fp248_t)( ((int64_t)a << FP248_FRAC) / b ); };
|
|
|
|
#include <math.h>
|
|
|
|
/*
|
|
#define FP_PI fp_make(M_PI)
|
|
#define FP_2PI (2*FP_PI)
|
|
|
|
#define FP_SQRT_2 fp_make(1.414213562373095)
|
|
#define FP_INV_SQRT_2 fp_make(0.707106781)
|
|
#define FP_SQRT_3 fp_make(1.73205080756887729352)
|
|
#define FP_INV_SQRT_3 fp_make(0.577350269)
|
|
*/
|
|
|