arm_cfft_radix2_q15.c File Reference

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arm_cfft_radix2_q15.c File Reference

## Functions

void | arm_cfft_radix2_q15 (const arm_cfft_radix2_instance_q15 *S, q15_t *pSrc)
| Processing function for the fixed-point CFFT/CIFFT.
void | arm_radix2_butterfly_q15 (q15_t *pSrc, uint32_t fftLen, q15_t *pCoef, uint16_t twidCoefModifier)
| Core function for the Radix-2 Q15 CFFT butterfly process.
void | arm_radix2_butterfly_inverse_q15 (q15_t *pSrc, uint32_t fftLen, q15_t *pCoef, uint16_t twidCoefModifier)
| Core function for the Radix-2 Q15 CFFT Inverse butterfly process.

## Function Documentation

void arm_radix2_butterfly_inverse_q15 | ( | q15_t * | pSrc,
|  | uint32_t | fftLen,
|  | q15_t * | pCoef,
|  | uint16_t | twidCoefModifier
| ) |  |

Parameters:

  [in,out] | *pSrc | points to the in-place buffer of Q15 data type.
  [in] | fftLen | length of the FFT.
  [in] | *pCoef | points to Twiddle coefficient buffer.
  [in] | twidCoefModifier | twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.

Returns:
  none.

References _SIMD32_OFFSET.

Referenced by arm_cfft_radix2_q15().

void arm_radix2_butterfly_q15 | ( | q15_t * | pSrc,
|  | uint32_t | fftLen,
|  | q15_t * | pCoef,
|  | uint16_t | twidCoefModifier
| ) |  |

end of Radix2_CFFT_CIFFT group

References _SIMD32_OFFSET.

Referenced by arm_cfft_radix2_q15().