Vector Offset

Functions
void	arm_offset_f32 (float32_t *pSrc, float32_t offset, float32_t *pDst, uint32_t blockSize)
	Adds a constant offset to a floating-point vector.
void	arm_offset_q15 (q15_t *pSrc, q15_t offset, q15_t *pDst, uint32_t blockSize)
	Adds a constant offset to a Q15 vector.
void	arm_offset_q31 (q31_t *pSrc, q31_t offset, q31_t *pDst, uint32_t blockSize)
	Adds a constant offset to a Q31 vector.
void	arm_offset_q7 (q7_t *pSrc, q7_t offset, q7_t *pDst, uint32_t blockSize)
	Adds a constant offset to a Q7 vector.

Description

Adds a constant offset to each element of a vector.

        
    pDst[n] = pSrc[n] + offset,   0 <= n < blockSize.        

The functions support in-place computation allowing the source and destination pointers to reference the same memory buffer. There are separate functions for floating-point, Q7, Q15, and Q31 data types.

Function Documentation

void arm_offset_f32	(	float32_t *	pSrc,
		float32_t	offset,
		float32_t *	pDst,
		uint32_t	blockSize
	)

Parameters

[in]	*pSrc	points to the input vector
[in]	offset	is the offset to be added
[out]	*pDst	points to the output vector
[in]	blockSize	number of samples in the vector

Returns

none.

References blockSize.

void arm_offset_q15	(	q15_t *	pSrc,
		q15_t	offset,
		q15_t *	pDst,
		uint32_t	blockSize
	)

Parameters

[in]	*pSrc	points to the input vector
[in]	offset	is the offset to be added
[out]	*pDst	points to the output vector
[in]	blockSize	number of samples in the vector

Returns

none.

Scaling and Overflow Behavior:

The function uses saturating arithmetic. Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated.

References __SIMD32, and blockSize.

void arm_offset_q31	(	q31_t *	pSrc,
		q31_t	offset,
		q31_t *	pDst,
		uint32_t	blockSize
	)

Parameters

[in]	*pSrc	points to the input vector
[in]	offset	is the offset to be added
[out]	*pDst	points to the output vector
[in]	blockSize	number of samples in the vector

Returns

none.

Scaling and Overflow Behavior:

The function uses saturating arithmetic. Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] are saturated.

References blockSize, and clip_q63_to_q31().

void arm_offset_q7	(	q7_t *	pSrc,
		q7_t	offset,
		q7_t *	pDst,
		uint32_t	blockSize
	)

Parameters

[in]	*pSrc	points to the input vector
[in]	offset	is the offset to be added
[out]	*pDst	points to the output vector
[in]	blockSize	number of samples in the vector

Returns

none.

Scaling and Overflow Behavior:

The function uses saturating arithmetic. Results outside of the allowable Q7 range [0x80 0x7F] are saturated.

References __PACKq7, __SIMD32, and blockSize.