verilog硬件仿真，实现32-bit RISC微处理器的算数逻辑单仿真元(ALU),实现加减运算、逻辑运算、移位运算。仿真级别为RTL级。-verilog hardware simulation, to achieve 32-bit RISC microprocessor arithmetic logic one simulation element (ALU), to achieve addition and subtraction operations, logic operations