?? alu.v
字號:
`timescale 1ns/1psmodule ALU(ALU_O,ALU_C,C_in,op,AC_in,GR_in); parameter width=8; output ALU_C; output [width-1:0] ALU_O; input C_in; input [4:0] op; input [width-1:0] AC_in; input [width-1:0] GR_in; reg [width-1:0] ALU_O; reg ALU_C; always @(C_in or op or AC_in or GR_in) begin case(op) 5'b00010:begin {ALU_C,ALU_O} = {C_in,AC_in};end 5'b00011:begin {ALU_C,ALU_O} = {C_in,GR_in};end 5'b00100:begin {ALU_C,ALU_O} = AC_in + GR_in;end 5'b00101:begin {ALU_C,ALU_O} = AC_in - GR_in;end 5'b00110:begin {ALU_C,ALU_O} = AC_in + GR_in + C_in;end 5'b00111:begin {ALU_C,ALU_O} = AC_in + GR_in - C_in;end 5'b01000:begin {ALU_C,ALU_O} = {C_in,AC_in&GR_in};end 5'b01001:begin {ALU_C,ALU_O} = {C_in,AC_in^GR_in};end 5'b01010:begin {ALU_C,ALU_O} = {GR_in,C_in};end 5'b01011:begin {ALU_C,ALU_O} = {C_in,GR_in};end default:begin {ALU_C,ALU_O} = {C_in,8'b0};end endcase endendmodule
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