EDK 7.1

Hi, Iam using Xilinx EDK 7.1 and have integrated a 4-bit adder as a custom ip. For the adder ip i have made use of 4 software addressable registers, 8 bits wide (the only options are of 8, 16, 32 bits). Iam not quite sure of how to access the consecutive registers using pointers. but when i point to the 32-bit base address of the adder and increment it with an offset it would point to a address 32 bits away when i actually want to access the slot 8 bits away. i know iam not doing the coding logic right ,Any suggestions would be great. Thanks Andy