a simple simulator of Y86

According to the requirement of ics courses in 2016 autumn, we write a project that simulate the executing process of assembly instructions like movl instructions(irmovl、 rrmovl、 mrmovl、 rmmovl)，Interger operating instructions (addl、 subl、 addl、 xorl)，jump instructions(jmp、 jle、 jl、 je、 jge、 jg)

The operation in five stages(fetch, decode, execute, memory, written stages) of each cycle will be displayed in the interface.