op_dsp32_fix_sqrt.c File Reference

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

Macros
#define	DSP32_SQRT_NEWTON_ITERATION(x_num, data)
#define	DSP32_SQRT_ONE_POINT_FIVE   ((S64) (3LL << (DSP32_QB-1)))

Functions
dsp32_t	dsp32_op_sqrt (dsp32_t num)
	32-bit fixed point version of the square root function. More...

#define DSP32_SQRT_NEWTON_ITERATION	(		x_num,
			data
	)

Value:

a = (x*x); \
  a = (s64_num*a) >> (DSP32_QB+1); \
  x = (x*(DSP32_SQRT_ONE_POINT_FIVE - a)) >> (DSP32_QB);

Referenced by dsp32_op_sqrt().

#define DSP32_SQRT_ONE_POINT_FIVE   ((S64) (3LL << (DSP32_QB-1)))