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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 zero; | |
10 | u8 i0; | |
11 | u8 i1; | |
12 | u8 i2; | |
13 | u8 i3; | |
14 | u8 x; | |
15 | u8 t; | |
16 | u8 o; | |
17 | u8 _; | |
18 | void g(void) { | |
19 | // g(i, x, t, o) -> t | |
20 | #define tmp _ | |
21 | ANDI (t, 0x07) | |
22 | MOV (tmp, i2) | |
23 | ANDI (tmp, 3) | |
24 | TST (tmp) | |
25 | #undef tmp | |
26 | BREQ (skip) | |
27 | SUBI (t, -8) | |
28 | skip: | |
29 | t = data[t]; | |
30 | /*MOV X_hi==_, data_hi | |
31 | MOV X_lo==t, data_lo | |
32 | ADD X_lo, t | |
33 | CLR zero | |
34 | ADC X_hi, zero | |
35 | LD t, X */ | |
36 | t = (((i1&0x1f)<<8|i0)*t)>>8 >> o; //TODO; NOTE: o == {1, 2, 4} | |
37 | AND (t, x) | |
38 | ANDI (t, 3) | |
39 | RET | |
40 | }; | |
41 | ||
42 | int main(void) { | |
43 | u8 n; | |
44 | u8 s; | |
45 | u8 acc; | |
46 | //TODO: clear all vars/registers | |
47 | for (;;) { | |
48 | MOV (n, i2) | |
49 | LSL (n) | |
50 | LSL (n) | |
51 | #define tmp acc | |
52 | MOV (tmp, i1) | |
53 | SWAP (tmp) | |
54 | ANDI (tmp, 0x0f) | |
55 | LSR (tmp) | |
56 | LSR (tmp) | |
57 | OR (n, tmp) | |
58 | #undef tmp | |
59 | MOV (s, i3) | |
60 | ROR (s) | |
61 | ROR (s) | |
62 | ANDI (s, 0x80) | |
63 | #define tmp acc | |
64 | MOV (tmp, i2) | |
65 | LSR (tmp) | |
66 | OR (s, tmp) | |
67 | #undef tmp | |
68 | ||
69 | //voice 1: | |
70 | LDI (x, 1) | |
71 | MOV (t, n) | |
72 | LDI (o, 4) | |
73 | RCALL g(); | |
74 | MOV (acc, t) | |
75 | ||
76 | //voice 2: | |
77 | MOV (x, s) | |
78 | #define tmp o | |
79 | MOV (tmp, i2) | |
80 | LSL (tmp) | |
81 | LSL (tmp) | |
82 | LSL (tmp) | |
83 | MOV (t, i1) | |
84 | SWAP (t) | |
85 | ANDI (t, 0xf) | |
86 | LSR (t) | |
87 | OR (t, tmp) | |
88 | #undef tmp | |
89 | EOR (t, n) | |
90 | LDI (o, 2) | |
91 | RCALL g(); | |
92 | ADD (acc, t) | |
93 | ||
94 | //voice 3: | |
95 | MOV (x, s) | |
96 | INC (x) | |
97 | #define tmp o | |
98 | MOV (tmp, x) | |
99 | LSR (tmp) | |
100 | LSR (tmp) | |
101 | ADD (tmp, x) | |
102 | ROR (tmp) | |
103 | LSR (tmp) | |
104 | ADD (tmp, x) | |
105 | ROR (tmp) | |
106 | LSR (tmp) | |
107 | ADD (tmp, x) | |
108 | ROR (tmp) | |
109 | LSR (tmp) | |
110 | MOV (x, tmp) | |
111 | #undef tmp | |
112 | t = ((i3&0x01)<<13 | i2<<5 | i1>>3) % 3; //TODO | |
113 | ADD (t, n) | |
114 | LDI (o, 2) | |
115 | RCALL g(); | |
116 | ADD (acc, t) | |
117 | ||
118 | //voice 4: | |
119 | MOV (x, s) | |
120 | INC (x) | |
121 | #define tmp o | |
122 | MOV (tmp, x) | |
123 | LSR (tmp) | |
124 | ADD (tmp, x) | |
125 | ROR (tmp) | |
126 | LSR (tmp) | |
127 | LSR (tmp) | |
128 | ADD (tmp, x) | |
129 | ROR (tmp) | |
130 | ADD (tmp, x) | |
131 | ROR (tmp) | |
132 | LSR (tmp) | |
133 | LSR (tmp) | |
134 | MOV (x, tmp) | |
135 | #undef tmp | |
136 | t = ((i3&0x01)<<14 | i2<<6 | i1>>2) % 3; //TODO | |
137 | SUB (t, n) | |
138 | NEG (t) | |
139 | SUBI (t, -8) | |
140 | LDI (o, 1) | |
141 | RCALL g(); | |
142 | ADD (acc, t) | |
143 | ||
144 | putchar(acc<<4); | |
145 | #define tmp acc | |
146 | CLR (tmp) //NOTE: maybe use dedicated zero register? | |
147 | SUBI (i0, -1) | |
148 | ADC (i1, tmp, !i0) | |
149 | ADC (i2, tmp, !i0&&!i1) | |
150 | ADC (i3, tmp, !i0&&!i1&&!i2) | |
151 | #undef tmp | |
152 | } | |
153 | } |