Commit | Line | Data |
---|---|---|
61fab018 | 1 | #include <stdio.h> |
da32ed67 | 2 | #include "fakeasm.h" |
61fab018 | 3 | typedef unsigned char u8; |
da32ed67 | 4 | |
24abdcbb TG |
5 | u8 data[] = { |
6 | 0x84, 0x9d, 0xb0, 0x69, 0x9d, 0x84, 0x69, 0x58, | |
7 | 0x75, 0x8c, 0xb0, 0x69, 0x8c, 0x75, 0x69, 0x58 | |
8 | }; | |
95fa231f | 9 | u8 zero; //zero register |
06aad1ff TG |
10 | u8 i0; |
11 | u8 i1; | |
12 | u8 i2; | |
13 | u8 i3; | |
d5b74a12 TG |
14 | u8 t; //implicitly cleared by mov t,n |
15 | u8 x; //implicitly cleared by mov x,s | |
16 | u8 _; //implicitly cleared by mov tmp,* | |
37bf20ea | 17 | #define Mh x //mod3 vars |
dbf91c38 | 18 | #define Ml t // -"- |
e98ab46f | 19 | //http://homepage.divms.uiowa.edu/~jones/bcd/mod.shtml |
8d8c00e4 TG |
20 | void mod3(void) { |
21 | // mod3(Mh.Ml) -> t | |
22 | #define tmp _ | |
5b1c6cc5 TG |
23 | ADD (Ml, Mh) |
24 | CLR (Mh) | |
3d517d8a TG |
25 | ADC (Mh, zero, carry) //Mh only holds the carry bit |
26 | MOV (tmp, Ml) | |
27 | SWAP (tmp) | |
28 | ANDI (tmp, 0x0f) | |
29 | SWAP (Mh) | |
30 | OR (tmp, Mh) | |
0e3d0279 | 31 | ANDI (Ml, 0x0f) |
2a69999d | 32 | ADD (Ml, tmp) |
0fc1d6d3 TG |
33 | MOV (tmp, Ml) |
34 | LSR (tmp) | |
35 | LSR (tmp) | |
6c72d3c1 | 36 | ANDI (Ml, 0x03) |
2a69999d TG |
37 | ADD (Ml, tmp) |
38 | MOV (tmp, Ml) | |
39 | LSR (tmp) | |
40 | LSR (tmp) | |
41 | ANDI (Ml, 0x03) | |
42 | ADD (Ml, tmp) | |
c3639d5b TG |
43 | CPI (Ml, 3) |
44 | BRPL (skip) | |
197a5418 | 45 | SUBI (Ml, 3) |
c3639d5b | 46 | skip:; |
4283632d | 47 | RET |
8d8c00e4 | 48 | #undef tmp |
e98ab46f | 49 | } |
965274e2 | 50 | void g(void) { |
362b33c9 | 51 | // g(i, t) -> t |
eafeaf93 | 52 | // tempvars: `x` and `_` |
49137fbf | 53 | #define tmp _ |
0f219114 | 54 | ANDI (t, 0x07) |
32632e61 | 55 | MOV (tmp, i2) |
63363195 | 56 | ANDI (tmp, 3) |
09cf3949 | 57 | TST (tmp) |
49137fbf | 58 | #undef tmp |
09cf3949 TG |
59 | BREQ (skip) |
60 | SUBI (t, -8) | |
61 | skip: | |
c616f0c2 | 62 | t = data[t]; |
8ee3310e | 63 | /*MOV X_hi==x, data_hi |
49137fbf TG |
64 | MOV X_lo==t, data_lo |
65 | ADD X_lo, t | |
49137fbf TG |
66 | ADC X_hi, zero |
67 | LD t, X */ | |
e5715654 | 68 | t = (((i1&0x1f)<<8|i0)*t)>>8; //TODO |
d5b74a12 | 69 | RET //TODO: replace CALL/RET with IJMP? |
61fab018 TG |
70 | }; |
71 | ||
72 | int main(void) { | |
d5b74a12 TG |
73 | u8 n; //implicitly cleared by mov n,i2 |
74 | u8 s; //implicitly cleared by mov s,i3 | |
75 | u8 acc;//implicitly cleared by mov acc,t | |
76 | //TODO: clear i0, i1, i2, i3, zero registers | |
5dd8b8ff | 77 | for (;;) { |
7874ed03 TG |
78 | MOV (n, i2) |
79 | LSL (n) | |
80 | LSL (n) | |
8ee3310e | 81 | #define tmp _ |
bc7680e3 | 82 | MOV (tmp, i1) |
5d4207f9 TG |
83 | SWAP (tmp) |
84 | ANDI (tmp, 0x0f) | |
3eef1ade TG |
85 | LSR (tmp) |
86 | LSR (tmp) | |
128ff01a | 87 | OR (n, tmp) |
bc7680e3 | 88 | #undef tmp |
df192822 | 89 | MOV (s, i3) |
27b03017 TG |
90 | ROR (s) |
91 | ROR (s) | |
92 | ANDI (s, 0x80) | |
8ee3310e | 93 | #define tmp _ |
a582bbc3 TG |
94 | MOV (tmp, i2) |
95 | LSR (tmp) | |
e389879f | 96 | OR (s, tmp) |
df192822 | 97 | #undef tmp |
3b86ca43 TG |
98 | |
99 | //voice 1: | |
3b86ca43 | 100 | MOV (t, n) |
965274e2 | 101 | RCALL g(); |
c09a6ed8 TG |
102 | SWAP (t) |
103 | ANDI (t, 0x0f) | |
f28def6a | 104 | ANDI (t, 1) |
46a8d83c | 105 | MOV (acc, t) |
3b86ca43 TG |
106 | |
107 | //voice 2: | |
37bf20ea | 108 | #define tmp _ |
94c4920f TG |
109 | MOV (tmp, i2) |
110 | LSL (tmp) | |
111 | LSL (tmp) | |
112 | LSL (tmp) | |
113 | MOV (t, i1) | |
4b0b7dc5 TG |
114 | SWAP (t) |
115 | ANDI (t, 0xf) | |
116 | LSR (t) | |
94c4920f | 117 | OR (t, tmp) |
1b023e92 | 118 | #undef tmp |
23872091 | 119 | EOR (t, n) |
965274e2 | 120 | RCALL g(); |
7716b427 TG |
121 | LSR (t) |
122 | LSR (t) | |
123 | ANDI (t, 3) | |
f28def6a | 124 | AND (t, s) |
46a8d83c | 125 | ADD (acc, t) |
3b86ca43 TG |
126 | |
127 | //voice 3: | |
500692e4 TG |
128 | MOV (Ml, i2) |
129 | SWAP (Ml) | |
130 | ANDI (Ml, 0xf0) | |
131 | LSL (Ml) | |
8ee3310e | 132 | #define tmp _ |
500692e4 TG |
133 | MOV (tmp, i1) |
134 | LSR (tmp) | |
135 | LSR (tmp) | |
136 | LSR (tmp) | |
137 | OR (Ml, tmp) | |
138 | #undef tmp | |
d39a46f5 TG |
139 | MOV (Mh, i3) |
140 | SWAP (Mh) | |
141 | ANDI (Mh, 0xf0) | |
142 | LSL (Mh) | |
143 | #define tmp _ | |
144 | MOV (tmp, i2) | |
145 | LSR (tmp) | |
146 | LSR (tmp) | |
147 | LSR (tmp) | |
148 | OR (Mh, tmp) | |
149 | #undef tmp | |
dbf91c38 | 150 | RCALL mod3(); |
18570947 | 151 | ADD (t, n) |
965274e2 | 152 | RCALL g(); |
c6c6cbe5 TG |
153 | LSR (t) |
154 | LSR (t) | |
155 | ANDI (t, 3) | |
f28def6a TG |
156 | MOV (x, s) |
157 | INC (x) | |
37bf20ea | 158 | #define tmp _ |
f28def6a TG |
159 | MOV (tmp, x) |
160 | LSR (tmp) | |
161 | LSR (tmp) | |
162 | ADD (tmp, x) | |
163 | ROR (tmp) | |
164 | LSR (tmp) | |
165 | ADD (tmp, x) | |
166 | ROR (tmp) | |
167 | LSR (tmp) | |
168 | ADD (tmp, x) | |
169 | ROR (tmp) | |
170 | LSR (tmp) | |
171 | MOV (x, tmp) | |
172 | #undef tmp | |
5d9a2389 | 173 | AND (t, x) |
46a8d83c | 174 | ADD (acc, t) |
3b86ca43 TG |
175 | |
176 | //voice 4: | |
649bb224 TG |
177 | MOV (Ml, i2) |
178 | SWAP (Ml) | |
179 | ANDI (Ml, 0xf0) | |
180 | LSL (Ml) | |
181 | LSL (Ml) | |
8ee3310e | 182 | #define tmp _ |
649bb224 TG |
183 | MOV (tmp, i1) |
184 | LSR (tmp) | |
185 | LSR (tmp) | |
186 | OR (Ml, tmp) | |
187 | #undef tmp | |
18426c43 TG |
188 | MOV (Mh, i3) |
189 | SWAP (Mh) | |
190 | ANDI (Mh, 0xf0) | |
191 | LSL (Mh) | |
192 | LSL (Mh) | |
193 | #define tmp _ | |
194 | MOV (tmp, i2) | |
195 | LSR (tmp) | |
196 | LSR (tmp) | |
197 | OR (Mh, tmp) | |
198 | #undef tmp | |
dbf91c38 | 199 | RCALL mod3(); |
e4f7baf0 TG |
200 | SUB (t, n) |
201 | NEG (t) | |
902cfdea | 202 | SUBI (t, -8) |
965274e2 | 203 | RCALL g(); |
c6c6cbe5 TG |
204 | LSR (t) |
205 | ANDI (t, 3) | |
d8af0686 TG |
206 | MOV (x, s) |
207 | INC (x) | |
37bf20ea | 208 | #define tmp _ |
d8af0686 TG |
209 | MOV (tmp, x) |
210 | LSR (tmp) | |
211 | ADD (tmp, x) | |
212 | ROR (tmp) | |
213 | LSR (tmp) | |
214 | LSR (tmp) | |
215 | ADD (tmp, x) | |
216 | ROR (tmp) | |
217 | ADD (tmp, x) | |
218 | ROR (tmp) | |
219 | LSR (tmp) | |
220 | LSR (tmp) | |
221 | MOV (x, tmp) | |
222 | #undef tmp | |
5d9a2389 | 223 | AND (t, x) |
46a8d83c | 224 | ADD (acc, t) |
bfce2f8c | 225 | |
95fa231f | 226 | putchar(acc<<4); //TODO |
89f35588 | 227 | SUBI (i0, -1) |
95fa231f TG |
228 | ADC (i1, zero, !i0) |
229 | ADC (i2, zero, !i0&&!i1) | |
230 | ADC (i3, zero, !i0&&!i1&&!i2) | |
fe9a76e4 | 231 | } |
61fab018 | 232 | } |