When the scaling_mode constant in the parameter structure is set to SSR_FFT_GROW_TO_MAX_WIDTH, it specifies growth from stage to stage, starting from the first stage to a specified max bit width. The output bit width grows until 27 bits and then saturates. The output bit width grows by log2(R) bits in every stage, and then maxes outs at 27 bits to keep the butterfly operation mapping to DSPs. This option is useful when the initial input bit width is less than 27 bits.