csky_pow_q31_yv.c File Reference

Functions
static float64_t	_exp1 (float64_t x, float64_t xx, float64_t error)
	Fast approximation to the exponential function for float64_t-point data. More...
static float64_t	_log1 (float64_t x, float64_t *delta, float64_t *error)
	Fast approximation to the logarithm function for float64_t-point data. More...
static q31_t	_checkint (float64_t x)
	a function to check the double value is intger, odd, even or neither. More...
q31_t	csky_dsp_lib_pow_int32 (q31_t arg_in_x, q15_t arg_exp_in_x, q31_t arg_in_y, q15_t arg_exp_in_y, q31_t *arg_exp_out)
	Fast approximation to the exponential function for float64_t-point data. More...

Function Documentation

static q31_t _checkint ( float64_t  x )

static

Parameters

[in]

x

input value in double.

Returns

flag.

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

static

Parameters

[in]	x	input value in double.
[in]	xx	input value in double.
[out]	*error	output value in double.

Returns

e^(x+xx).

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

static

end of Pow group

Parameters

[in]	x	input value in double.
[out]	*delta	output value in double.
[out]	*error	output value in double.

Returns

log(x).