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[Chiptunes.git] / foo.c
CommitLineData
61fab018 1#include <stdio.h>
da32ed67 2#include "fakeasm.h"
61fab018 3typedef unsigned char u8;
da32ed67 4
24abdcbb
TG
5u8 data[] = {
6 0x84, 0x9d, 0xb0, 0x69, 0x9d, 0x84, 0x69, 0x58,
7 0x75, 0x8c, 0xb0, 0x69, 0x8c, 0x75, 0x69, 0x58
8};
06aad1ff
TG
9u8 i0;
10u8 i1;
11u8 i2;
12u8 i3;
3b86ca43
TG
13u8 x;
14u8 t;
15u8 o;
965274e2 16void g(void) {
46a8d83c 17 // g(i, x, t, o) -> t
63363195 18 u8 tmp;
0f219114 19 ANDI (t, 0x07)
32632e61 20 MOV (tmp, i2)
63363195 21 ANDI (tmp, 3)
09cf3949
TG
22 TST (tmp)
23 BREQ (skip)
24 SUBI (t, -8)
25 skip:
c616f0c2 26 t = data[t];
965274e2 27 t = ((i3<<24|i2<<16|i1<<8|i0)*t) >> o;
c616f0c2
TG
28 AND (t, x)
29 ANDI (t, 3)
46a8d83c 30 RET
61fab018
TG
31};
32
33int main(void) {
a1631438
TG
34 u8 n;
35 u8 s;
ab6fe4c2 36 u8 acc;
89f35588 37 //TODO: clear all vars/registers
5dd8b8ff 38 for (;;) {
7874ed03
TG
39 MOV (n, i2)
40 LSL (n)
41 LSL (n)
42 n = (n | i1>>6);
b67a2de3 43 s = (i3<<7 | i2>>1);
3b86ca43
TG
44
45 //voice 1:
46 LDI (x, 1)
47 MOV (t, n)
48 LDI (o, 12)
965274e2 49 RCALL g();
46a8d83c 50 MOV (acc, t)
3b86ca43
TG
51
52 //voice 2:
53 MOV (x, s)
1b023e92 54 #define tmp o
94c4920f
TG
55 MOV (tmp, i2)
56 LSL (tmp)
57 LSL (tmp)
58 LSL (tmp)
59 MOV (t, i1)
4b0b7dc5
TG
60 SWAP (t)
61 ANDI (t, 0xf)
62 LSR (t)
94c4920f 63 OR (t, tmp)
1b023e92 64 #undef tmp
23872091 65 EOR (t, n)
3b86ca43 66 LDI (o, 10)
965274e2 67 RCALL g();
46a8d83c 68 ADD (acc, t)
3b86ca43
TG
69
70 //voice 3:
71 x = s / 3;
d9218a18 72 t = n + ((i3<<13 | i2<<5 | i1>>3) % 3);
3b86ca43 73 LDI (o, 10)
965274e2 74 RCALL g();
46a8d83c 75 ADD (acc, t)
3b86ca43
TG
76
77 //voice 4:
78 x = s / 5;
704b11ab 79 t = 8 + n - ((i3<<14 | i2<<6 | i1>>2) % 3);
3b86ca43 80 LDI (o, 9)
965274e2 81 RCALL g();
46a8d83c 82 ADD (acc, t)
bfce2f8c 83
ab6fe4c2 84 putchar(acc<<4);
89f35588
TG
85 #define tmp acc
86 LDI (tmp, 0)
87 SUBI (i0, -1)
88 ADC (i1, tmp, !i0)
89 ADC (i2, tmp, !i0&&!i1)
90 ADC (i3, tmp, !i0&&!i1&&!i2)
dd7bbc4a 91 #undef tmp
fe9a76e4 92 }
61fab018 93}
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