Vector Subtraction

void riscv_sub_f32(const float32_t *pSrcA, const float32_t *pSrcB, float32_t *pDst, uint32_t blockSize)
void riscv_sub_q15(const q15_t *pSrcA, const q15_t *pSrcB, q15_t *pDst, uint32_t blockSize)
void riscv_sub_q31(const q31_t *pSrcA, const q31_t *pSrcB, q31_t *pDst, uint32_t blockSize)
void riscv_sub_q7(const q7_t *pSrcA, const q7_t *pSrcB, q7_t *pDst, uint32_t blockSize)
group BasicSub

Element-by-element subtraction of two vectors.

There are separate functions for floating-point, Q7, Q15, and Q31 data types.

Functions

void riscv_sub_f32(const float32_t *pSrcA, const float32_t *pSrcB, float32_t *pDst, uint32_t blockSize)

Floating-point vector subtraction.

Return

none

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

void riscv_sub_q15(const q15_t *pSrcA, const q15_t *pSrcB, q15_t *pDst, uint32_t blockSize)

Q15 vector subtraction.

Return

none

Scaling and Overflow Behavior

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

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

void riscv_sub_q31(const q31_t *pSrcA, const q31_t *pSrcB, q31_t *pDst, uint32_t blockSize)

Q31 vector subtraction.

Return

none

Scaling and Overflow Behavior

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

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

void riscv_sub_q7(const q7_t *pSrcA, const q7_t *pSrcB, q7_t *pDst, uint32_t blockSize)

Q7 vector subtraction.

Return

none

Scaling and Overflow Behavior

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

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