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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; //zero register | |
10 | u8 i0; | |
11 | u8 i1; | |
12 | u8 i2; | |
13 | u8 i3; | |
14 | u8 x; | |
15 | u8 t; | |
16 | u8 o; | |
17 | u8 _; | |
18 | #define Mh o //mod3 vars | |
19 | #define Ml t // -"- | |
20 | void mod3(void) { //avail: t, o _ | |
21 | //http://homepage.divms.uiowa.edu/~jones/bcd/mod.shtml | |
22 | #define tmp _ | |
23 | //unsigned short a = ((Mh) + (Ml)) ;//&0x1ff; | |
24 | // Mh = a>>8; //1 bit | |
25 | // Ml = a; | |
26 | ADD (Ml, Mh) | |
27 | CLR (Mh) | |
28 | ADC (Mh, zero, carry) | |
29 | Ml = (Mh<<4|Ml>>4) + (Ml & 0xF); | |
30 | Ml = (Ml >> 2) + (Ml & 0x3); | |
31 | Ml = (Ml >> 2) + (Ml & 0x3); | |
32 | if (Ml > 2) Ml = Ml - 3; | |
33 | #undef tmp | |
34 | } | |
35 | void g(void) { | |
36 | // g(i, x, t, o) -> t | |
37 | #define tmp _ | |
38 | ANDI (t, 0x07) | |
39 | MOV (tmp, i2) | |
40 | ANDI (tmp, 3) | |
41 | TST (tmp) | |
42 | #undef tmp | |
43 | BREQ (skip) | |
44 | SUBI (t, -8) | |
45 | skip: | |
46 | t = data[t]; | |
47 | /*MOV X_hi==_, data_hi | |
48 | MOV X_lo==t, data_lo | |
49 | ADD X_lo, t | |
50 | ADC X_hi, zero | |
51 | LD t, X */ | |
52 | t = (((i1&0x1f)<<8|i0)*t)>>8; //TODO | |
53 | t >>= o; //NOTE: o == {1, 2, 4} | |
54 | AND (t, x) | |
55 | ANDI (t, 3) | |
56 | RET | |
57 | }; | |
58 | ||
59 | int main(void) { | |
60 | u8 n; | |
61 | u8 s; | |
62 | u8 acc; | |
63 | //TODO: clear all vars/registers | |
64 | for (;;) { | |
65 | MOV (n, i2) | |
66 | LSL (n) | |
67 | LSL (n) | |
68 | #define tmp acc | |
69 | MOV (tmp, i1) | |
70 | SWAP (tmp) | |
71 | ANDI (tmp, 0x0f) | |
72 | LSR (tmp) | |
73 | LSR (tmp) | |
74 | OR (n, tmp) | |
75 | #undef tmp | |
76 | MOV (s, i3) | |
77 | ROR (s) | |
78 | ROR (s) | |
79 | ANDI (s, 0x80) | |
80 | #define tmp acc | |
81 | MOV (tmp, i2) | |
82 | LSR (tmp) | |
83 | OR (s, tmp) | |
84 | #undef tmp | |
85 | ||
86 | //voice 1: | |
87 | LDI (x, 1) | |
88 | MOV (t, n) | |
89 | LDI (o, 4) | |
90 | RCALL g(); | |
91 | MOV (acc, t) | |
92 | ||
93 | //voice 2: | |
94 | MOV (x, s) | |
95 | #define tmp o | |
96 | MOV (tmp, i2) | |
97 | LSL (tmp) | |
98 | LSL (tmp) | |
99 | LSL (tmp) | |
100 | MOV (t, i1) | |
101 | SWAP (t) | |
102 | ANDI (t, 0xf) | |
103 | LSR (t) | |
104 | OR (t, tmp) | |
105 | #undef tmp | |
106 | EOR (t, n) | |
107 | LDI (o, 2) | |
108 | RCALL g(); | |
109 | ADD (acc, t) | |
110 | ||
111 | //voice 3: | |
112 | MOV (x, s) | |
113 | INC (x) | |
114 | #define tmp o | |
115 | MOV (tmp, x) | |
116 | LSR (tmp) | |
117 | LSR (tmp) | |
118 | ADD (tmp, x) | |
119 | ROR (tmp) | |
120 | LSR (tmp) | |
121 | ADD (tmp, x) | |
122 | ROR (tmp) | |
123 | LSR (tmp) | |
124 | ADD (tmp, x) | |
125 | ROR (tmp) | |
126 | LSR (tmp) | |
127 | MOV (x, tmp) | |
128 | #undef tmp | |
129 | Ml = i2<<5 | i1>>3; | |
130 | Mh = i3<<5 | i2>>3; | |
131 | RCALL mod3(); | |
132 | ADD (t, n) | |
133 | LDI (o, 2) | |
134 | RCALL g(); | |
135 | ADD (acc, t) | |
136 | ||
137 | //voice 4: | |
138 | MOV (x, s) | |
139 | INC (x) | |
140 | #define tmp o | |
141 | MOV (tmp, x) | |
142 | LSR (tmp) | |
143 | ADD (tmp, x) | |
144 | ROR (tmp) | |
145 | LSR (tmp) | |
146 | LSR (tmp) | |
147 | ADD (tmp, x) | |
148 | ROR (tmp) | |
149 | ADD (tmp, x) | |
150 | ROR (tmp) | |
151 | LSR (tmp) | |
152 | LSR (tmp) | |
153 | MOV (x, tmp) | |
154 | #undef tmp | |
155 | Ml = i2<<6 | i1>>2; | |
156 | Mh = i3<<6 | i2>>2; | |
157 | RCALL mod3(); | |
158 | SUB (t, n) | |
159 | NEG (t) | |
160 | SUBI (t, -8) | |
161 | LDI (o, 1) | |
162 | RCALL g(); | |
163 | ADD (acc, t) | |
164 | ||
165 | putchar(acc<<4); //TODO | |
166 | SUBI (i0, -1) | |
167 | ADC (i1, zero, !i0) | |
168 | ADC (i2, zero, !i0&&!i1) | |
169 | ADC (i3, zero, !i0&&!i1&&!i2) | |
170 | } | |
171 | } |