MUX.v

`include "Defines.v"

module MUX_2_to_1(first, second, sel_first, sel_second, out);
  
	parameter WORD_LENGTH = 32;
	input[WORD_LENGTH - 1:0] first, second;
	input sel_first, sel_second;
	output[WORD_LENGTH - 1:0] out;
	
	assign out = sel_first ? first : (sel_second ? second : out); 
	
endmodule

module MUX_3_to_1(first, second, third, sel, out);
  
	parameter WORD_LENGTH = 32;
	input [WORD_LENGTH - 1:0] first, second, third;
	input [1:0] sel;
	output [WORD_LENGTH - 1:0] out;
	
	assign out = (sel == `FORW_SEL_FROM_ID) ? first :
			((sel == `FORW_SEL_FROM_WB) ? second :
			((sel == `FORW_SEL_FROM_MEM) ? third : out)); 
	
endmodule