Mean

void riscv_mean_f16(const float16_t *pSrc, uint32_t blockSize, float16_t *pResult)

void riscv_mean_f32(const float32_t *pSrc, uint32_t blockSize, float32_t *pResult)

void riscv_mean_f64(const float64_t *pSrc, uint32_t blockSize, float64_t *pResult)

void riscv_mean_q15(const q15_t *pSrc, uint32_t blockSize, q15_t *pResult)

void riscv_mean_q31(const q31_t *pSrc, uint32_t blockSize, q31_t *pResult)

void riscv_mean_q7(const q7_t *pSrc, uint32_t blockSize, q7_t *pResult)

group mean

Calculates the mean of the input vector. Mean is defined as the average of the elements in the vector. The underlying algorithm is used:

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

Functions

void riscv_mean_f16(const float16_t *pSrc, uint32_t blockSize, float16_t *pResult)

Mean value of a floating-point vector.

Parameters

pSrc – [in] points to the input vector.
blockSize – [in] number of samples in input vector.
pResult – [out] mean value returned here.

Returns

none

void riscv_mean_f32(const float32_t *pSrc, uint32_t blockSize, float32_t *pResult)

Mean value of a floating-point vector.

Parameters

pSrc – [in] points to the input vector.
blockSize – [in] number of samples in input vector.
pResult – [out] mean value returned here.

Returns

none

void riscv_mean_f64(const float64_t *pSrc, uint32_t blockSize, float64_t *pResult)

Mean value of a floating-point vector.

Parameters

pSrc – [in] points to the input vector.
blockSize – [in] number of samples in input vector.
pResult – [out] mean value returned here.

Returns

none

void riscv_mean_q15(const q15_t *pSrc, uint32_t blockSize, q15_t *pResult)

Mean value of a Q15 vector.

Scaling and Overflow Behavior: The function is implemented using a 32-bit internal accumulator. The input is represented in 1.15 format and is accumulated in a 32-bit accumulator in 17.15 format. There is no risk of internal overflow with this approach, and the full precision of intermediate result is preserved. Finally, the accumulator is truncated to yield a result of 1.15 format.

Parameters

pSrc – [in] points to the input vector
blockSize – [in] number of samples in input vector
pResult – [out] mean value returned here

Returns

none

void riscv_mean_q31(const q31_t *pSrc, uint32_t blockSize, q31_t *pResult)

Mean value of a Q31 vector.

Scaling and Overflow Behavior: The function is implemented using a 64-bit internal accumulator. The input is represented in 1.31 format and is accumulated in a 64-bit accumulator in 33.31 format. There is no risk of internal overflow with this approach, and the full precision of intermediate result is preserved. Finally, the accumulator is truncated to yield a result of 1.31 format.

Parameters

pSrc – [in] points to the input vector
blockSize – [in] number of samples in input vector
pResult – [out] mean value returned here

Returns

none

void riscv_mean_q7(const q7_t *pSrc, uint32_t blockSize, q7_t *pResult)

Mean value of a Q7 vector.

Scaling and Overflow Behavior: The function is implemented using a 32-bit internal accumulator. The input is represented in 1.7 format and is accumulated in a 32-bit accumulator in 25.7 format. There is no risk of internal overflow with this approach, and the full precision of intermediate result is preserved. Finally, the accumulator is truncated to yield a result of 1.7 format.

Parameters

pSrc – [in] points to the input vector
blockSize – [in] number of samples in input vector
pResult – [out] mean value returned here

Returns

none