csky_pow_f64.c File Reference

Functions
static float64_t	_exp1 (float64_t x, float64_t xx, float64_t error)
static float64_t	_log1 (float64_t x, float64_t *delta, float64_t *error)
static q31_t	_checkint (float64_t x)
float64_t	csky_pow_f64 (float64_t x, float64_t y)
	Fast approximation to the exponential function for float64_t-point data. More...

Function Documentation

static q31_t _checkint ( float64_t  x )

static

A function to check the double value is intger, odd, even or neither. param[in] x input value in double. return flag.

static float64_t _exp1 ( float64_t  x, float64_t  xx, float64_t  error  )

static

Fast approximation to the exponential function for float64_t-point data. param[in] x input value in double. param[in] xx input value in double. param[out] *error output value in double. return e^(x+xx).

static float64_t _log1 ( float64_t  x, float64_t *  delta, float64_t *  error  )

static

Fast approximation to the logarithm function for float64_t-point data. param[in] x input value in double. param[out] *delta output value in double. param[out] *error output value in double. return log(x).