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关于FFT



dsplib_c64Px_3_4_0_0 文件夹下,DSP_ifft32x32文件夹提供的.c.h文件为什么是gen_twiddle_fft32x32而不是gen_twiddle_ifft32x32?所以用DSP_fft32x32做完FFT以后如何做反FFT?