Vector Fixed Point Division

Collaboration diagram for Vector Fixed Point Division:

Functions
int	tpt_divide_q31 (q31_t *aQuotient, int16_t *aShift, q31_t aNumerator, q31_t aDenominator)
	Fixed point division for q31. More...
int	tpt_divide_q15 (q15_t *aQuotient, int16_t *aShift, q15_t aNumerator, q15_t aDenominator)
	Fixed point division for q15. More...

Detailed Description

Fixed point division functions divide a numerator by a denominator to get a quotient value which is normalized between -1.0 and 1.0, and a shift left value will also be output to get the unnormalized quotient.

Terapines DSP library supports distinct fixed point division functions for Q15 and Q31 data types. The functions are introduced in the subsections below.

Function Documentation

tpt_divide_q15()

int tpt_divide_q15	(	q15_t *	aQuotient,
		int16_t *	aShift,
		q15_t	aNumerator,
		q15_t	aDenominator
	)

Fixed point division for q15.

Parameters

[out]	aQuotient	quotient value normalized between -1.0 and 1.0
[out]	aShift	shift left value to get the unnormalized quotient
[in]	aNumerator	numerator value
[in]	aDenominator	denominator value

Returns

-1, when denominator equal to zero.

tpt_divide_q31()

int tpt_divide_q31	(	q31_t *	aQuotient,
		int16_t *	aShift,
		q31_t	aNumerator,
		q31_t	aDenominator
	)

Fixed point division for q31.

Parameters

[out]	aQuotient	quotient value normalized between -1.0 and 1.0
[out]	aShift	shift left value to get the unnormalized quotient
[in]	aNumerator	numerator value
[in]	aDenominator	denominator value

Returns

-1, when denominator equal to zero.