Convert 32-bit floating point value

void riscv_float_to_q15(const float32_t *pSrc, q15_t *pDst, uint32_t blockSize)
void riscv_float_to_q31(const float32_t *pSrc, q31_t *pDst, uint32_t blockSize)
void riscv_float_to_q7(const float32_t *pSrc, q7_t *pDst, uint32_t blockSize)
group float_to_x

Functions

void riscv_float_to_q15(const float32_t *pSrc, q15_t *pDst, uint32_t blockSize)

Converts the elements of the floating-point vector to Q15 vector.

Return

none

Details

The equation used for the conversion process is:

Scaling and Overflow Behavior

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

Note

In order to apply rounding, the library should be rebuilt with the ROUNDING macro defined in the preprocessor section of project options.

Parameters
  • [in] pSrc: points to the floating-point input vector

  • [out] pDst: points to the Q15 output vector

  • [in] blockSize: number of samples in each vector

void riscv_float_to_q31(const float32_t *pSrc, q31_t *pDst, uint32_t blockSize)

Converts the elements of the floating-point vector to Q31 vector.

Return

none

Details

The equation used for the conversion process is:

Scaling and Overflow Behavior

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

Note

In order to apply rounding, the library should be rebuilt with the ROUNDING macro defined in the preprocessor section of project options.

Parameters
  • [in] pSrc: points to the floating-point input vector

  • [out] pDst: points to the Q31 output vector

  • [in] blockSize: number of samples in each vector

void riscv_float_to_q7(const float32_t *pSrc, q7_t *pDst, uint32_t blockSize)

Converts the elements of the floating-point vector to Q7 vector.

Return

none.

Description:

The equation used for the conversion process is:

Scaling and Overflow Behavior:

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

Note

In order to apply rounding, the library should be rebuilt with the ROUNDING macro defined in the preprocessor section of project options.

Parameters
  • [in] *pSrc: points to the floating-point input vector

  • [out] *pDst: points to the Q7 output vector

  • [in] blockSize: length of the input vector