.method Fib(n1, n2, times)
.var
temp
counter
.end-var
    BIPUSH 0
    ISTORE temp
    BIPUSH 0
    ISTORE counter

while:
    ILOAD n1
    ILOAD n2
    IADD
    ISTORE temp
    ILOAD n1
    ILOAD n2
    SWAP
    POP
    ISTORE n1
    ILOAD temp
    ISTORE n2
    IINC counter 1
    ILOAD times
    IFICMPEQ end
    GOTO while

end: ILOAD temp
    IRETURN

.end-method