CMSIS-DSP  Version 1.8.0
CMSIS DSP Software Library
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Functions

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

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 ( const 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 each vector
Returns
none
void arm_offset_q15 ( const 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 each vector
Returns
none
Scaling and Overflow Behavior
The function uses saturating arithmetic. Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated.
void arm_offset_q31 ( const 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 each vector
Returns
none
Scaling and Overflow Behavior
The function uses saturating arithmetic. Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] are saturated.
void arm_offset_q7 ( const 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 each vector
Returns
none
Scaling and Overflow Behavior
The function uses saturating arithmetic. Results outside of the allowable Q7 range [0x80 0x7F] are saturated.