AWR6843AOP: The fixed point FFT process of HWA is simulated by MATLAB

Hello, I'd like to ask you about simulating the FFT process of Hwa with MATLAB. The FFT result of MATLAB simulation is consistent with that of Hwa. In the simulation process, the input data is supplemented with 8 zeros in high order, and the output data is shifted to the right by 8 bits. However, the difference between the FFT result of MATLAB and the FFT result of Hwa is 1~2 times. Is there any doubt in the butterfly operation process? The 25 bit output of MSB is saturated and cut to 24 bits, which is the high-order operation? LSB is rounded to 24 bits, that is, every 1 gets 1? It is not clear how to operate the saturation cut and rounding. Is there any matlab or C code to realize Hwa