Barrel shifter processing method based on DVB-S2 decoder and barrel shifter

The invention discloses a barrel-shaped shifter processing method based on a DVB-S2 decoder and a barrel-shaped shifter. The method comprises the steps of obtaining node information of a target node needing to be subjected to shift processing; determining a parallelism degree based on a pre-selected folding factor; determining a shift calculation model corresponding to the degree of parallelism; and performing shift processing on the node information according to the shift calculation model, so that a barrel-shaped shifter of the DVB-S2 decoder completes shift processing on the node information of the target node. According to the method, the parallelism degree is determined through the preset folding factor, so that the effect of associating the folding factor with the parallelism degreeis achieved, and the purpose of expanding the compatibility of the DVB-S2 decoder to the parallelism degree is achieved; and meanwhile, the shifting calculation model is directly utilized, so that theshifting calculation time