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1.1 root 1: /*
2: * UAE - The Un*x Amiga Emulator
3: *
4: * Read 68000 CPU specs from file "table68k" and build table68k.c
5: *
6: * Copyright 1995,1996 Bernd Schmidt
7: */
8:
9:
10: #include <assert.h>
11: #include <ctype.h>
12:
13: /*
14: #include "config.h"
15: #include "options.h"
16: #include "sysconfig.h"
17: */
18: #include "sysdeps.h"
19: #include "readcpu.h"
20:
21: static FILE *tablef;
22: static int nextch = 0;
23:
24: static void getnextch(void)
25: {
26: do {
27: nextch = fgetc(tablef);
28: if (nextch == '%') {
29: do {
30: nextch = fgetc(tablef);
31: } while (nextch != EOF && nextch != '\n');
32: }
33: } while (nextch != EOF && isspace(nextch));
34: }
35:
36: static int nextchtohex(void)
37: {
38: switch (isupper (nextch) ? tolower (nextch) : nextch) {
39: case '0': return 0;
40: case '1': return 1;
41: case '2': return 2;
42: case '3': return 3;
43: case '4': return 4;
44: case '5': return 5;
45: case '6': return 6;
46: case '7': return 7;
47: case '8': return 8;
48: case '9': return 9;
49: case 'a': return 10;
50: case 'b': return 11;
51: case 'c': return 12;
52: case 'd': return 13;
53: case 'e': return 14;
54: case 'f': return 15;
55: default: abort();
56: }
57: }
58:
59: int main(int argc, char **argv)
60: {
61: int no_insns = 0;
62:
63: /*
64: printf ("#include \"sysconfig.h\"\n");
65: printf ("#include \"config.h\"\n");
66: printf ("#include \"options.h\"\n");
67: */
68: printf ("#include \"sysdeps.h\"\n");
69: printf ("#include \"readcpu.h\"\n");
70: printf ("struct instr_def defs68k[] = {\n");
71: #if 0
72: tablef = fopen("table68k","r");
73: if (tablef == NULL) {
74: fprintf(stderr, "table68k not found\n");
75: exit(1);
76: }
77: #else
78: tablef = stdin;
79: #endif
80: getnextch();
81: while (nextch != EOF) {
82: int cpulevel, plevel, sduse;
83: int i;
84:
85: char patbits[16];
86: char opcstr[256];
87: int bitpos[16];
88: int flagset[5], flaguse[5];
89:
90: unsigned int bitmask,bitpattern;
91: int n_variable;
92:
93: n_variable = 0;
94: bitmask = bitpattern = 0;
95: memset (bitpos, 0, sizeof(bitpos));
96: for(i=0; i<16; i++) {
97: int currbit;
98: bitmask <<= 1;
99: bitpattern <<= 1;
100:
101: switch (nextch) {
102: case '0': currbit = bit0; bitmask |= 1; break;
103: case '1': currbit = bit1; bitmask |= 1; bitpattern |= 1; break;
104: case 'c': currbit = bitc; break;
105: case 'C': currbit = bitC; break;
106: case 'f': currbit = bitf; break;
107: case 'i': currbit = biti; break;
108: case 'I': currbit = bitI; break;
109: case 'j': currbit = bitj; break;
110: case 'J': currbit = bitJ; break;
111: case 'k': currbit = bitk; break;
112: case 'K': currbit = bitK; break;
113: case 's': currbit = bits; break;
114: case 'S': currbit = bitS; break;
115: case 'd': currbit = bitd; break;
116: case 'D': currbit = bitD; break;
117: case 'r': currbit = bitr; break;
118: case 'R': currbit = bitR; break;
119: case 'z': currbit = bitz; break;
120: default: abort();
121: }
122: if (!(bitmask & 1)) {
123: bitpos[n_variable] = currbit;
124: n_variable++;
125: }
126:
127: if (nextch == '0' || nextch == '1')
128: bitmask |= 1;
129: if (nextch == '1')
130: bitpattern |= 1;
131: patbits[i] = nextch;
132: getnextch();
133: }
134:
135: while (isspace(nextch) || nextch == ':') /* Get CPU and privilege level */
136: getnextch();
137:
138: switch (nextch) {
139: case '0': cpulevel = 0; break;
140: case '1': cpulevel = 1; break;
141: case '2': cpulevel = 2; break;
142: case '3': cpulevel = 3; break;
143: case '4': cpulevel = 4; break;
144: default: abort();
145: }
146: getnextch();
147:
148: switch (nextch) {
149: case '0': plevel = 0; break;
150: case '1': plevel = 1; break;
151: case '2': plevel = 2; break;
152: case '3': plevel = 3; break;
153: default: abort();
154: }
155: getnextch();
156:
157: while (isspace(nextch)) /* Get flag set information */
158: getnextch();
159:
160: if (nextch != ':')
161: abort();
162:
163: for(i = 0; i < 5; i++) {
164: getnextch();
165: switch(nextch){
166: case '-': flagset[i] = fa_unset; break;
167: case '/': flagset[i] = fa_isjmp; break;
168: case '0': flagset[i] = fa_zero; break;
169: case '1': flagset[i] = fa_one; break;
170: case 'x': flagset[i] = fa_dontcare; break;
171: case '?': flagset[i] = fa_unknown; break;
172: default: flagset[i] = fa_set; break;
173: }
174: }
175:
176: getnextch();
177: while (isspace(nextch))
178: getnextch();
179:
180: if (nextch != ':') /* Get flag used information */
181: abort();
182:
183: for(i = 0; i < 5; i++) {
184: getnextch();
185: switch(nextch){
186: case '-': flaguse[i] = fu_unused; break;
187: case '/': flaguse[i] = fu_isjmp; break;
188: case '+': flaguse[i] = fu_maybecc; break;
189: case '?': flaguse[i] = fu_unknown; break;
190: default: flaguse[i] = fu_used; break;
191: }
192: }
193:
194: getnextch();
195: while (isspace(nextch))
196: getnextch();
197:
198: if (nextch != ':') /* Get source/dest usage information */
199: abort();
200:
201: getnextch();
202: sduse = nextchtohex() << 4;
203: getnextch();
204: sduse |= nextchtohex();
205:
206: getnextch();
207: while (isspace(nextch))
208: getnextch();
209:
210: if (nextch != ':')
211: abort();
212:
213: fgets(opcstr, 250, tablef);
214: getnextch();
215: {
216: int j;
217: /* Remove superfluous spaces from the string */
218: char *opstrp = opcstr, *osendp;
219: int slen = 0;
220:
221: while (isspace(*opstrp))
222: opstrp++;
223:
224: osendp = opstrp;
225: while (*osendp) {
226: if (!isspace (*osendp))
227: slen = osendp - opstrp + 1;
228: osendp++;
229: }
230: opstrp[slen] = 0;
231:
232: if (no_insns > 0)
233: printf(",\n");
234: no_insns++;
235: printf("{ %d, %d, {", bitpattern, n_variable);
236: for (j = 0; j < 16; j++) {
237: printf("%d", bitpos[j]);
238: if (j < 15)
239: printf(",");
240: }
241: printf ("}, %d, %d, %d, { ", bitmask, cpulevel, plevel);
242: for(i = 0; i < 5; i++) {
243: printf("{ %d, %d }%c ", flaguse[i], flagset[i], i == 4 ? ' ' : ',');
244: }
245: printf("}, %d, \"%s\"}", sduse, opstrp);
246: }
247: }
248: printf("};\nint n_defs68k = %d;\n", no_insns);
249: return 0;
250: }
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