Remove the useless port in ex.v
Add the icode,rA,rB ports,remove the dstE,dstM ports
Judge the dstE and dstM value in mem_wb.v. Now the rrmovl irmovl and opl instructions can work
Add the support for rmmovl and mrmovl
Replace PCLEN with WORD
Get the dstE value in id.v
Get the dstM value in id.v
Remove the rA and rB port after id.v
Add the fwd_b.v to avoiding valB hazard by forwarding
Change some variables' name
Add the sel_fwd_a.v to avoiding valA hazard by forwarding.Now most pipeline hazards can be solved