?? alu_mux.txt
字號:
`timescale 1ns/100ps
//_____________________________________________
// Company : tud
// Author : ander
// E-Mail : <email>
//
// Date : Thu Nov 2 12:21:43 2006
// Last Change : Thu Nov 2 12:21:43 2006
// Module Name : alu_mux
// Filename : alu_mux.v
// Project Name : prz/tutorial06
// Description : <short description>
//
//_____________________________________________
module alu_mux (
alu_arith_res,
cy_arith_res,
alu_shft_res,
cy_shft_res,
sel_func,
reg_cy_bus,
reg_alu_bus
);
input [7:0] alu_arith_res;
input cy_arith_res;
input [7:0] alu_shft_res;
input cy_shft_res;
input sel_func;
output reg_cy_bus;
output [7:0] reg_alu_bus;
reg reg_cy_bus;
reg [7:0] reg_alu_bus;
parameter ARITH = 1'b0;
parameter SHFT = 1'b1;
always @(alu_arith_res or cy_arith_res or
alu_shft_res or cy_shft_res or
sel_func)
begin
case (sel_func)
ARITH:
begin
reg_cy_bus = cy_arith_res;
reg_alu_bus [7:0] = alu_arith_res[7:0];
end
SHFT:
begin
reg_cy_bus = cy_shft_res;
reg_alu_bus [7:0] = alu_shft_res[7:0];
end
default:
begin
reg_cy_bus = 1'b0;
reg_alu_bus [7:0] = 8'h00;
end
endcase
end
endmodule
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