Vector OffsetBasic Math Functions

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]*pSrcpoints to the input vector
[in]offsetis the offset to be added
[out]*pDstpoints to the output vector
[in]blockSizenumber 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]*pSrcpoints to the input vector
[in]offsetis the offset to be added
[out]*pDstpoints to the output vector
[in]blockSizenumber 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 __PKHBT, __QADD16(), __SIMD32, and blockSize.

void arm_offset_q31 ( q31_t pSrc,
q31_t  offset,
q31_t pDst,
uint32_t  blockSize 
)
Parameters
[in]*pSrcpoints to the input vector
[in]offsetis the offset to be added
[out]*pDstpoints to the output vector
[in]blockSizenumber 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 __QADD(), blockSize, and clip_q63_to_q31().

void arm_offset_q7 ( q7_t pSrc,
q7_t  offset,
q7_t pDst,
uint32_t  blockSize 
)
Parameters
[in]*pSrcpoints to the input vector
[in]offsetis the offset to be added
[out]*pDstpoints to the output vector
[in]blockSizenumber 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, __QADD8(), __SIMD32, and blockSize.