What is int_width about in arm_nn_activations_direct_q7 about

Hi all,

recently, I am trying to implement neural networks on one of my Cortex-M devices. However, I wasn't know what "int_width" in arm_nn_activations_direct_q7 is about. The definition in the document is: "bit-width of the integer part, assume to be smaller than 3" but it is still unclear to me. Please give me some example about it as I am trying to transfer neural networks from other DL framework like tensorflow and pytorch. Many thanks!!