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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 (;;) {
ab6fe4c2 39 acc = 0;
0eba146b 40 n = (i2<<2 | i1>>6);
b67a2de3 41 s = (i3<<7 | i2>>1);
3b86ca43
TG
42
43 //voice 1:
44 LDI (x, 1)
45 MOV (t, n)
46 LDI (o, 12)
965274e2 47 RCALL g();
46a8d83c 48 MOV (acc, t)
3b86ca43
TG
49
50 //voice 2:
51 MOV (x, s)
53c905aa 52 t = n ^ (i2<<3 | i1>>5);
3b86ca43 53 LDI (o, 10)
965274e2 54 RCALL g();
46a8d83c 55 ADD (acc, t)
3b86ca43
TG
56
57 //voice 3:
58 x = s / 3;
d9218a18 59 t = n + ((i3<<13 | i2<<5 | i1>>3) % 3);
3b86ca43 60 LDI (o, 10)
965274e2 61 RCALL g();
46a8d83c 62 ADD (acc, t)
3b86ca43
TG
63
64 //voice 4:
65 x = s / 5;
704b11ab 66 t = 8 + n - ((i3<<14 | i2<<6 | i1>>2) % 3);
3b86ca43 67 LDI (o, 9)
965274e2 68 RCALL g();
46a8d83c 69 ADD (acc, t)
bfce2f8c 70
ab6fe4c2 71 putchar(acc<<4);
89f35588
TG
72 #define tmp acc
73 LDI (tmp, 0)
74 SUBI (i0, -1)
75 ADC (i1, tmp, !i0)
76 ADC (i2, tmp, !i0&&!i1)
77 ADC (i3, tmp, !i0&&!i1&&!i2)
fe9a76e4 78 }
61fab018 79}
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