An integrated circuit comprises a plurality of tiles. Each tile comprises: a processor, a switch including switching circuitry to forward data received over data paths from other tiles to the processor and to switches of other tiles, and to forward data received from the processor to switches of other tiles, according to a switch instruction indicating an input port to which each of multiple output ports of the switch is to be coupled, and a translation lookaside buffer coupled to the switch to translate virtual memory addresses of switch instructions to physical memory addresses of the switch instructions.