这是一个VHDL(硬件描述语言)的编译器,更确切说是一个解释器,输入是VHDL语言,输出是经过提到后的符号表,也就是将VHDL中的重要变量比如输入输出变量和DFF等保存下来。-This is a VHDL (hardware description language) compiler, more precise explanation is a device that is VHDL input, output was mentioned after the symbol table to VHDL is the important variables such as input and output variables and other DFF preserved.