op_dsp16_fix_sqrt.c File Reference

#include "dsp.h"
#include "preprocessor.h"

Macros
#define	DSP16_SQRT_NEWTON_ITERATION(x_num, data)
#define	DSP16_SQRT_ONE_POINT_FIVE   ((S32) (3 << (DSP16_QB-1)))

Functions
dsp16_t	dsp16_op_sqrt (dsp16_t num)
	16-bit fixed point version of the square root function. More...

#define DSP16_SQRT_NEWTON_ITERATION	(		x_num,
			data
	)

Value:

a = ((S32) x)*((S32) x); \
  a = (((S32) num)*a) >> (DSP16_QB+1); \
  x = (((S32) x)*(DSP16_SQRT_ONE_POINT_FIVE - a)) >> (DSP16_QB);

Referenced by dsp16_op_sqrt().

#define DSP16_SQRT_ONE_POINT_FIVE   ((S32) (3 << (DSP16_QB-1)))