Vector SubtractionBasic Math Functions
Functions | |
void | arm_sub_f32 (float32_t *pSrcA, float32_t *pSrcB, float32_t *pDst, uint32_t blockSize) |
Floating-point vector subtraction. | |
void | arm_sub_q15 (q15_t *pSrcA, q15_t *pSrcB, q15_t *pDst, uint32_t blockSize) |
Q15 vector subtraction. | |
void | arm_sub_q31 (q31_t *pSrcA, q31_t *pSrcB, q31_t *pDst, uint32_t blockSize) |
Q31 vector subtraction. | |
void | arm_sub_q7 (q7_t *pSrcA, q7_t *pSrcB, q7_t *pDst, uint32_t blockSize) |
Q7 vector subtraction. | |
Description
Element-by-element subtraction of two vectors.
pDst[n] = pSrcA[n] - pSrcB[n], 0 <= n < blockSize.
There are separate functions for floating-point, Q7, Q15, and Q31 data types.
Function Documentation
- Parameters
-
[in] *pSrcA
points to the first input vector [in] *pSrcB
points to the second input vector [out] *pDst
points to the output vector [in] blockSize
number 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] will be saturated.
References __QSUB16(), __SIMD32, and blockSize.
- Parameters
-
[in] *pSrcA
points to the first input vector [in] *pSrcB
points to the second input vector [out] *pDst
points to the output vector [in] blockSize
number 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] will be saturated.
References __QSUB(), blockSize, and clip_q63_to_q31().
- Parameters
-
[in] *pSrcA
points to the first input vector [in] *pSrcB
points to the second input vector [out] *pDst
points to the output vector [in] blockSize
number 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] will be saturated.