git://git.gir.st / Chiptunes.git / blame
| Commit | Line | Data |
|---|---|---|
| 61fab018 | 1 | #include <stdio.h> |
| da32ed67 | 2 | #include "fakeasm.h" |
| 61fab018 | 3 | typedef unsigned char u8; |
| da32ed67 | 4 | |
| 24abdcbb TG |
5 | u8 data[] = { |
| 6 | 0x84, 0x9d, 0xb0, 0x69, 0x9d, 0x84, 0x69, 0x58, | |
| 7 | 0x75, 0x8c, 0xb0, 0x69, 0x8c, 0x75, 0x69, 0x58 | |
| 8 | }; | |
| 3b86ca43 TG |
9 | u8 x; |
| 10 | u8 t; | |
| 11 | u8 o; | |
| 12 | u8 g(int i) { | |
| 63363195 | 13 | u8 tmp; |
| 0f219114 | 14 | ANDI (t, 0x07) |
| 63363195 TG |
15 | tmp = i >> 16; |
| 16 | ANDI (tmp, 3) | |
| 09cf3949 TG |
17 | TST (tmp) |
| 18 | BREQ (skip) | |
| 19 | SUBI (t, -8) | |
| 20 | skip: | |
| c616f0c2 | 21 | t = data[t]; |
| c616f0c2 TG |
22 | t = (i*t) >> o; |
| 23 | AND (t, x) | |
| 24 | ANDI (t, 3) | |
| 25 | return t; | |
| 61fab018 TG |
26 | }; |
| 27 | ||
| 28 | int main(void) { | |
| fe9a76e4 | 29 | int i; |
| c65ddced TG |
30 | unsigned short n; |
| 31 | unsigned short s; | |
| ab6fe4c2 | 32 | u8 acc; |
| fe9a76e4 | 33 | for (i = 0;; i++) { |
| ab6fe4c2 | 34 | acc = 0; |
| fe9a76e4 TG |
35 | n = i >> 14; |
| 36 | s = i >> 17; | |
| 3b86ca43 TG |
37 | |
| 38 | //voice 1: | |
| 39 | LDI (x, 1) | |
| 40 | MOV (t, n) | |
| 41 | LDI (o, 12) | |
| 42 | acc += g(i); | |
| 43 | ||
| 44 | //voice 2: | |
| 45 | MOV (x, s) | |
| 46 | t = n ^ i >> 13; | |
| 47 | LDI (o, 10) | |
| 48 | acc += g(i); | |
| 49 | ||
| 50 | //voice 3: | |
| 51 | x = s / 3; | |
| 52 | t = n + ((i >> 11) % 3); | |
| 53 | LDI (o, 10) | |
| 54 | acc += g(i); | |
| 55 | ||
| 56 | //voice 4: | |
| 57 | x = s / 5; | |
| 58 | t = 8 + n - ((i >> 10) % 3); | |
| 59 | LDI (o, 9) | |
| 60 | acc += g(i); | |
| ab6fe4c2 | 61 | putchar(acc<<4); |
| fe9a76e4 | 62 | } |
| 61fab018 | 63 | } |