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1 | #include <stdio.h> | |
2 | #include "fakeasm.h" | |
3 | typedef unsigned char u8; | |
4 | ||
5 | u8 data[] = { | |
6 | 0x84, 0x9d, 0xb0, 0x69, 0x9d, 0x84, 0x69, 0x58, | |
7 | 0x75, 0x8c, 0xb0, 0x69, 0x8c, 0x75, 0x69, 0x58 | |
8 | }; | |
9 | u8 i0; | |
10 | u8 i1; | |
11 | u8 i2; | |
12 | u8 i3; | |
13 | u8 x; | |
14 | u8 t; | |
15 | u8 o; | |
16 | void g(int i) { | |
17 | // g(i, x, t, o) -> t | |
18 | u8 tmp; | |
19 | ANDI (t, 0x07) | |
20 | MOV (tmp, i2) | |
21 | ANDI (tmp, 3) | |
22 | TST (tmp) | |
23 | BREQ (skip) | |
24 | SUBI (t, -8) | |
25 | skip: | |
26 | t = data[t]; | |
27 | t = (i*t) >> o; | |
28 | AND (t, x) | |
29 | ANDI (t, 3) | |
30 | RET | |
31 | }; | |
32 | ||
33 | int main(void) { | |
34 | int i = 0; | |
35 | unsigned short n; | |
36 | unsigned short s; | |
37 | u8 acc; | |
38 | for (;;) { | |
39 | acc = 0; | |
40 | n = i >> 14; | |
41 | s = i >> 17; | |
42 | ||
43 | //voice 1: | |
44 | LDI (x, 1) | |
45 | MOV (t, n) | |
46 | LDI (o, 12) | |
47 | RCALL g(i); | |
48 | MOV (acc, t) | |
49 | ||
50 | //voice 2: | |
51 | MOV (x, s) | |
52 | t = n ^ i >> 13; | |
53 | LDI (o, 10) | |
54 | RCALL g(i); | |
55 | ADD (acc, t) | |
56 | ||
57 | //voice 3: | |
58 | x = s / 3; | |
59 | t = n + ((i >> 11) % 3); | |
60 | LDI (o, 10) | |
61 | RCALL g(i); | |
62 | ADD (acc, t) | |
63 | ||
64 | //voice 4: | |
65 | x = s / 5; | |
66 | t = 8 + n - ((i >> 10) % 3); | |
67 | LDI (o, 9) | |
68 | RCALL g(i); | |
69 | ADD (acc, t) | |
70 | ||
71 | putchar(acc<<4); | |
72 | i++; | |
73 | i0 = i; | |
74 | i1 = i>>8; | |
75 | i2 = i>>16; | |
76 | i3 = i>>24; | |
77 | } | |
78 | } |