riscv_cfft_radix2_instance_q31 Struct Reference

Instance structure for the Radix-2 Q31 CFFT/CIFFT function. More...

Data Fields
uint16_t	fftLen
uint8_t	ifftFlag
uint8_t	bitReverseFlag
const q31_t *	pTwiddle
const uint16_t *	pBitRevTable
uint16_t	twidCoefModifier
uint16_t	bitRevFactor

Detailed Description

Instance structure for the Radix-2 Q31 CFFT/CIFFT function.

Field Documentation

bitReverseFlag

uint8_t riscv_cfft_radix2_instance_q31::bitReverseFlag

flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output.

bitRevFactor

uint16_t riscv_cfft_radix2_instance_q31::bitRevFactor

bit reversal modifier that supports different size FFTs with the same bit reversal table.

fftLen

uint16_t riscv_cfft_radix2_instance_q31::fftLen

length of the FFT.

ifftFlag

uint8_t riscv_cfft_radix2_instance_q31::ifftFlag

flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform.

pBitRevTable

const uint16_t* riscv_cfft_radix2_instance_q31::pBitRevTable

points to the bit reversal table.

pTwiddle

const q31_t* riscv_cfft_radix2_instance_q31::pTwiddle

points to the Twiddle factor table.

twidCoefModifier

uint16_t riscv_cfft_radix2_instance_q31::twidCoefModifier

twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.