The uplink subgraph UL64A32L is the reverse of the downlink subgraph. Review the graph definition in the src/inc/subsys.h It consists of four bfCascadingChain subgraphs each of the length of eight beamforming kernels. This subgraph has eight data input ports and 32 coefficient input ports. All four chains get the same input data. Each chain gets eight of the coefficient input ports each. There are four output data ports for the output of each chain.