関連ワード:  4 bit binary adder verilog code    4 bit binary subtractor verilog code    4 bit binary adder subtractor verilog code    4 bit binary parallel adder verilog code    4 bit adder subtractor verilog code    4 bit adder subtractor verilog code behavioral    4 bit adder subtractor verilog code testbench    4 bit adder subtractor verilog code structural    bcd adder using 4 bit binary adder verilog code    4 bit subtractor verilog code