这是一段verilog的调用测试例子，可以以此作为参考，对其他verilog仿真时，进行调用。-This is a verilog call the test example, can be used as a reference, on the other Verilog simulation call.

用于国密4的加解密算法实现，采用verilog 语言，可进行vivado仿真，vivado版本是2013，结果经测试正常，适合从事相关行业的工作人员进行借鉴和开发。(The code is realized and simulated by verilog. The simulation result has been confirmed by the author. It is recommended to download by the researchers who are in the