Vector Subtraction

Functions
void	csky_dsp_lib_vec_sub16 (q15_t *A, q15_t *B, uint32_t N, q15_t *C)
	Q15 vector subtraction. More...
void	csky_dsp_lib_vec_sub32 (q31_t *A, q31_t *B, uint32_t N, q31_t *C)
	Q31 vector subtraction. More...

Description

Element-by-element subtraction of the Vector in the same length, the computaional process is:

    *(C+i) = *(A+i) - *(B+i),   0 <= i < N.

support for q15 and q31 format.

Function Documentation

void csky_dsp_lib_vec_sub16	(	q15_t *	A,
		q15_t *	B,
		uint32_t	N,
		q15_t *	C
	)

Parameters

[in]	*A	points to the input buffer a
[in]	*B	points to the input buffer b
[in]	N	number of samples in each vector
[out]	*C	points to the output buffer

Returns

none

Scaling and Overflow Behavior:

The function uses saturating arithmetic. The result will be saturated, so the out put value is in the range of [0x8000, 0x7FFF].

void csky_dsp_lib_vec_sub32	(	q31_t *	A,
		q31_t *	B,
		uint32_t	N,
		q31_t *	C
	)

Parameters

[in]	*A	points to the input buffer a
[in]	*B	points to the input buffer b
[in]	N	number of samples in each vector
[out]	*C	points to the output buffer

Returns

none

Scaling and Overflow Behavior:

The function uses saturating arithmetic. The result will be saturated, so the out put value is in the range of [0x80000000, 0x7FFFFFFF].