| | 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 x; |
| | 10 | u8 t; |
| | 11 | u8 o; |
| | 12 | u8 g(int i) { |
| | 13 | u8 tmp; |
| | 14 | ANDI (t, 0x07) |
| | 15 | tmp = i >> 16; |
| | 16 | ANDI (tmp, 3) |
| | 17 | TST (tmp) |
| | 18 | BREQ (skip) |
| | 19 | SUBI (t, -8) |
| | 20 | skip: |
| | 21 | t = data[t]; |
| | 22 | t = (i*t) >> o; |
| | 23 | AND (t, x) |
| | 24 | ANDI (t, 3) |
| | 25 | return t; |
| | 26 | }; |
| | 27 | |
| | 28 | int main(void) { |
| | 29 | int i = 0; |
| | 30 | unsigned short n; |
| | 31 | unsigned short s; |
| | 32 | u8 acc; |
| | 33 | for (;;) { |
| | 34 | acc = 0; |
| | 35 | n = i >> 14; |
| | 36 | s = i >> 17; |
| | 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); |
| | 61 | |
| | 62 | i++; |
| | 63 | putchar(acc<<4); |
| | 64 | } |
| | 65 | } |
git://git.gir.st / Chiptunes.git / blame_incremental