This is a SnowV algorithm RTL implement with a c model
the sbox of AES is designed by two case because of lack of ROM generate tool
if you 'd love to apply this implement,you 'd better to replace it.
the verification environment and design compiler result will be added when I have another spare time because of my weakness,I don't know how to handle with the pointer of dynamic array,the interface of c and sv can't be sloved.
ports：
clk\n
rst_n
key //this is the port for the key
iv //this is the port for the iv
length //how many 128bits you'd love to encrypt
start //start signal
valid //everytime it is high the output is valid z //the outout of SnowV
随便写的一个SnowV的RTL实现以及一个c模型，每个周期递归一次。
sbox受限于没有ROM生成工具只能用双case实现
如果真的有人要应用，最好替换一下
因为我太菜了，sv传参的时候搞不定动态数组的指针，暂时太监了。等我学一波uvm再回来填坑
初测在SMIC14nm工艺可以上2G，但好像有lvt的cell。
接口说明 clk
rst_n
key //256bit的密钥
iv //初始向量
length //需要加密的长度，单位是128bits
start
valid //高有效
z //每拍输出128bit数据
如果是中国大陆的人有特殊需求可以联系我，视情况有偿/无偿帮忙改进