HazardDetectionUnit.v

module HazardDetectionUnit(ID_ExMemRead,EX_MemMemRead,ID_Ex_Rt,IF_ID_Instr,holdPC,holdIF_ID,muxSelector);
  
  input ID_ExMemRead,EX_MemMemRead;
  input [4:0] ID_Ex_Rt;
  input [31:0] IF_ID_Instr;
  output reg holdPC, holdIF_ID, muxSelector;
  parameter beqOPcode=6'b000100;

  initial
	begin
	holdPC <= 0;
	holdIF_ID <= 0;
	muxSelector <= 0;
	end

  always@(ID_ExMemRead or ID_Ex_Rt or IF_ID_Instr)
    begin
      if (ID_ExMemRead && (holdPC == 1'b0) && (holdIF_ID == 1'b0))
        begin
          if(ID_Ex_Rt==IF_ID_Instr[25:21] || ID_Ex_Rt==IF_ID_Instr[20:15] )
            begin
              holdPC<=1;
              holdIF_ID<=1;
              muxSelector<=1;
            end
        end
      else if((IF_ID_Instr [31:26]==beqOPcode) && (holdPC == 1'b0) && (holdIF_ID == 1'b0))
        begin
          holdPC<=1;
          holdIF_ID<=1;
          muxSelector<=1;
        end
          
      else
        begin
          holdPC<=0;
          holdIF_ID<=0;
          muxSelector<=0;     
        end    
      
    end
  
  
endmodule