|
0
|
1
|
|
|
2 /* multipiler by Ben Moszkowski */
|
|
|
3
|
|
|
4 mux(Switch,In1,In2,Out) :-
|
|
|
5 if Switch = 0
|
|
|
6 then Out = In2
|
|
|
7 else Out = In1.
|
|
|
8
|
|
|
9 reg(In,Out) :- @Out = In.
|
|
|
10 flipflop(In,Out) :- @Out = In.
|
|
|
11
|
|
|
12 dec(In,Out) :-
|
|
|
13 if In = 0
|
|
|
14 then Out = 0
|
|
|
15 else Out = In-1.
|
|
|
16
|
|
|
17 adder(In1,In2,Out) :- Out = In1+In2.
|
|
|
18
|
|
|
19 zero_test(In,Out) :-
|
|
|
20 if In = 0
|
|
|
21 then Out = 1
|
|
|
22 else Out = 0.
|
|
|
23
|
|
|
24 or_gate(In1,In2,Out) :-
|
|
|
25 Out1 is In1 \/ In2,
|
|
|
26 Out = Out1.
|
|
|
27
|
|
|
28 mult_imp(In1,In2,M,N,Done) :-
|
|
|
29 % exists,(B1,B2,B3,B4,L1,L2,L3,L4,L5,L6,L7,L8,L9,L10)
|
|
|
30 #zero_test(In1,B4),
|
|
|
31 #(L10 = 0),
|
|
|
32 #mux(B4,L10,In2,L9),
|
|
|
33 #zero_test(In2,B2),
|
|
|
34 #dec(In1,L6),
|
|
|
35 #adder(L9,M,L8),
|
|
|
36 #dec(N,L3),
|
|
|
37 #mux(Done,L9,L8,L7),
|
|
|
38 #reg(L7,M),
|
|
|
39 #mux(Done,In1,L3,L1),
|
|
|
40 #reg(L1,N),
|
|
|
41 #dec(L3,L4),
|
|
|
42 #mux(Done,L6,L4,L5),
|
|
|
43 #zero_test(L5,B1),
|
|
|
44 #or_gate(B1,B2,B3),
|
|
|
45 #flipflop(B3,Done).
|
|
|
46
|
|
|
47 main :-
|
|
|
48 read((In1,In2)),
|
|
|
49 Done = 1,
|
|
|
50 M = 39,
|
|
|
51 N = 83,
|
|
|
52 In1 <-- In1,In2 <-- In2,
|
|
|
53 mult_imp(In1,In2,M,N,Done),
|
|
|
54 @(halt(Done=1)),
|
|
|
55 #write((Done,M,N)).
|
