NMSIS-NN  Version 1.2.0
NMSIS NN Software Library
Functions
Nndata_convert
Private

Functions

void riscv_q7_to_q15_no_shift (const q7_t *pSrc, q15_t *pDst, uint32_t blockSize)
 Converts the elements of the Q7 vector to Q15 vector without left-shift. More...
 
void riscv_q7_to_q15_reordered_no_shift (const q7_t *pSrc, q15_t *pDst, uint32_t blockSize)
 Converts the elements of the Q7 vector to reordered Q15 vector without left-shift. More...
 
void riscv_q7_to_q15_reordered_with_offset (const q7_t *src, q15_t *dst, uint32_t block_size, q15_t offset)
 Converts the elements of the Q7 vector to a reordered Q15 vector with an added offset. More...
 
void riscv_q7_to_q7_no_shift (const q7_t *pSrc, q7_t *pDst, uint32_t blockSize)
 Converts the elements of the Q7 vector to Q7 vector without left-shift. More...
 
void riscv_q7_to_q7_reordered_no_shift (const q7_t *pSrc, q7_t *pDst, uint32_t blockSize)
 Converts the elements of the Q7 vector to reordered Q7 vector without left-shift. More...
 

Detailed Description

Function Documentation

◆ riscv_q7_to_q15_no_shift()

void riscv_q7_to_q15_no_shift ( const q7_t *  pSrc,
q15_t *  pDst,
uint32_t  blockSize 
)

Converts the elements of the Q7 vector to Q15 vector without left-shift.

Converts the elements of the q7 vector to q15 vector without left-shift.

Parameters
[in]*pSrcpoints to the Q7 input vector
[out]*pDstpoints to the Q15 output vector
[in]blockSizelength of the input vector
Description:

The equation used for the conversion process is:

        pDst[n] = (q15_t) pSrc[n];   0 <= n < blockSize.

◆ riscv_q7_to_q15_reordered_no_shift()

void riscv_q7_to_q15_reordered_no_shift ( const q7_t *  pSrc,
q15_t *  pDst,
uint32_t  blockSize 
)

Converts the elements of the Q7 vector to reordered Q15 vector without left-shift.

Converts the elements of the s8 vector to reordered q15 vector without left-shift.

Parameters
[in]*pSrcpoints to the Q7 input vector
[out]*pDstpoints to the Q15 output vector
[in]blockSizelength of the input vector

This function does the q7 to q15 expansion with re-ordering

                         |   A1   |   A2   |   A3   |   A4   |
                          0      7 8     15 16    23 24    31

is converted into:

 |       A1       |       A3       |   and  |       A2       |       A4       |
  0             15 16            31          0             15 16            31

This looks strange but is natural considering how sign-extension is done at assembly level.

The expansion of other other oprand will follow the same rule so that the end results are the same.

The tail (i.e., last (N % 4) elements) will still be in original order.

◆ riscv_q7_to_q15_reordered_with_offset()

void riscv_q7_to_q15_reordered_with_offset ( const q7_t *  src,
q15_t *  dst,
uint32_t  block_size,
q15_t  offset 
)

Converts the elements of the Q7 vector to a reordered Q15 vector with an added offset.

Converts the elements from a s8 vector to a s16 vector with an added offset.

Note
Refer header file for details.

◆ riscv_q7_to_q7_no_shift()

void riscv_q7_to_q7_no_shift ( const q7_t *  pSrc,
q7_t *  pDst,
uint32_t  blockSize 
)

Converts the elements of the Q7 vector to Q7 vector without left-shift.

Parameters
[in]*pSrcpoints to the Q7 input vector
[out]*pDstpoints to the Q7 output vector
[in]blockSizelength of the input vector
Returns
none.
Description:

The equation used for the conversion process is:

        pDst[n] = (q15_t) pSrc[n];   0 <= n < blockSize.

◆ riscv_q7_to_q7_reordered_no_shift()

void riscv_q7_to_q7_reordered_no_shift ( const q7_t *  pSrc,
q7_t *  pDst,
uint32_t  blockSize 
)

Converts the elements of the Q7 vector to reordered Q7 vector without left-shift.

Parameters
[in]*pSrcpoints to the Q7 input vector
[out]*pDstpoints to the Q7 output vector
[in]blockSizelength of the input vector
Returns
none.

This function does the q7 to q7 expansion with re-ordering

                         |   A1   |   A2   |   A3   |   A4   |
                          0      7 8     15 16    23 24    31

is converted into:

 |       A1       |       A3       |   and  |       A2       |       A4       |
  0             15 16            31          0             15 16            31

This looks strange but is natural considering how sign-extension is done at assembly level.

The expansion of other other oprand will follow the same rule so that the end results are the same.

The tail (i.e., last (N % 4) elements) will still be in original order.