ch_math_utils.h File Reference

Functions for performing fixed point arithmetic. https://github.com/dmoulding/log2fix https://github.com/chmike/fpsqrt. More...

#include <stdio.h>
#include <math.h>
#include <stdint.h>

Go to the source code of this file.

Macros
#define	FRACT_BITS   16
#define	INT2FIXED(x)   ((x) << FRACT_BITS)
#define	FLOAT2FIXED(x)   ((fixed_t)((x) * (1 << FRACT_BITS)))
#define	FIXED2INT(x)   ((x) >> FRACT_BITS)
#define	FIXED2FLOAT(x)   (((float)(x)) / (1 << FRACT_BITS))
#define	FIXEDDIV(x, y)   ((fixed_t)(((uint64_t)(x) << FRACT_BITS) / (y)))
#define	FIXEDMUL(x, y)   ((fixed_t)(((x) >> (FRACT_BITS/2)) * ((y) >> (FRACT_BITS/2))))
#define	FIXED_PI   0x3243FU
#define	INV_LOG2_E_Q1DOT31   0x58b90bfcU

Typedefs
typedef uint32_t	fixed_t

Functions
fixed_t	FP_sqrt (fixed_t x)
fixed_t	FP_log2 (fixed_t x)
fixed_t	FP_log (fixed_t x)
int32_t	sqrt_int32 (int32_t v)

Detailed Description

Functions for performing fixed point arithmetic. https://github.com/dmoulding/log2fix https://github.com/chmike/fpsqrt.

Date

July 20, 2017

Author

nparikh

Copyright

Copyright 2017 Chirp Microsystems. All rights reserved.