When I went through the code (http://opencores.org/project,mips789) it seems that you haven't combined the control and datapath . I could find the controlpath code in ctl_fsm.v and data path in mips _core.v .
Is that correct or am I missing something ?
Dear Mr. wei, Li,
It was my mistake. the control path is included inside the RF_stage.v which is included in mips_core.v