1: /*
   2:  * Interpret a C intermediate file.
   3:  */
   4: #include <stdio.h>
   5: #include "c1.h"
   6: 
   7: extern  opdope[1];
   8: extern  char    *opntab[1];
   9: 
  10: struct table cctab[1], efftab[1], regtab[1], sptab[1];
  11: char    maprel[1], notrel[1];
  12: char    *outname();
  13: 
  14: main()
  15: {
  16:     register t, op;
  17:     static char s[9];
  18:     register char *tp;
  19:     double atof();
  20:     char numbuf[64];
  21:     int lbl, cond;
  22:     int sdep;
  23: 
  24:     sdep = 0;
  25:     for (;;) {
  26:         op = getw(stdin);
  27:         if ((op&0177400) != 0177000) {
  28:             error("Intermediate file error");
  29:             exit(1);
  30:         }
  31:         lbl = 0;
  32:         switch(op &= 0377) {
  33: 
  34:     case SINIT:
  35:         printf("init %d\n", getw(stdin));
  36:         break;
  37: 
  38:     case EOFC:
  39:         printf("eof\n");
  40:         exit(0);
  41: 
  42:     case BDATA:
  43:         if (getw(stdin) == 1) {
  44:             printf(".byte ");
  45:             for (;;)  {
  46:                 printf("%d", getw(stdin));
  47:                 if (getw(stdin) != 1)
  48:                     break;
  49:                 printf(",");
  50:             }
  51:             printf("\n");
  52:         }
  53:         break;
  54: 
  55:     case PROG:
  56:         printf("prog\n");
  57:         break;
  58: 
  59:     case DATA:
  60:         printf("data\n");
  61:         break;
  62: 
  63:     case BSS:
  64:         printf("bss\n");
  65:         break;
  66: 
  67:     case SYMDEF:
  68:         printf("symdef ");
  69:         outname(s);
  70:         printf("%s\n", s);
  71:         break;
  72: 
  73:     case RETRN:
  74:         printf("return\n");
  75:         break;
  76: 
  77:     case CSPACE:
  78:         tp = outname(s);
  79:         printf("comm %s,%d\n", tp, getw(stdin));
  80:         break;
  81: 
  82:     case SSPACE:
  83:         printf("space %d\n", getw(stdin));
  84:         break;
  85: 
  86:     case EVEN:
  87:         printf("even\n");
  88:         break;
  89: 
  90:     case SAVE:
  91:         printf("save\n");
  92:         break;
  93: 
  94:     case SETSTK:
  95:         t = getw(stdin)-6;
  96:         printf("setstack %d\n", t);
  97:         break;
  98: 
  99:     case PROFIL:
 100:         t = getw(stdin);
 101:         printf("profil %d\n", t);
 102:         break;
 103: 
 104:     case SNAME:
 105:         tp = outname(s);
 106:         printf("sname %s s%d\n", tp, getw(stdin));
 107:         break;
 108: 
 109:     case ANAME:
 110:         tp = outname(s);
 111:         printf("aname %s a%d\n", tp, getw(stdin));
 112:         break;
 113: 
 114:     case RNAME:
 115:         tp = outname(s);
 116:         printf("rname %s r%d\n", tp, getw(stdin));
 117:         break;
 118: 
 119:     case SWIT:
 120:         t = getw(stdin);
 121:         line = getw(stdin);
 122:         printf("switch line %d def %d\n", line, t);
 123:         while (t = getw(stdin)) {
 124:             printf("   %d %d\n", t, getw(stdin));
 125:         }
 126:         break;
 127: 
 128:     case CBRANCH:
 129:         lbl = getw(stdin);
 130:         cond = getw(stdin);
 131:     case EXPR:
 132:         line = getw(stdin);
 133:         if (sdep != 1) {
 134:             error("Expression input botch");
 135:             exit(1);
 136:         }
 137:         sdep = 0;
 138:         if (lbl)
 139:             printf("cbranch %d line %d\n", lbl, line);
 140:         else
 141:             printf("expr line %d\n", line);
 142:         break;
 143: 
 144:     case NAME:
 145:         t = getw(stdin);
 146:         if (t==EXTERN) {
 147:             t = getw(stdin);
 148:             printf("name %o, %s\n", t, outname(s));
 149:         } else if (t==AUTO) {
 150:             t = getw(stdin);
 151:             printf("name %o a%d\n", t, getw(stdin));
 152:         } else if (t==STATIC) {
 153:             t = getw(stdin);
 154:             printf("name %o s%d\n", t, getw(stdin));
 155:         } else if (t==REG) {
 156:             t = getw(stdin);
 157:             printf("name %o r%d\n", t, getw(stdin));
 158:         } else
 159:             printf("name botch\n");
 160:         sdep++;
 161:         break;
 162: 
 163:     case CON:
 164:         t = getw(stdin);
 165:         printf("const %d %d\n", t, getw(stdin));
 166:         sdep++;
 167:         break;
 168: 
 169:     case LCON:
 170:         getw(stdin);    /* ignore type, assume long */
 171:         t = getw(stdin);
 172:         op = getw(stdin);
 173:         printf("lconst %D\n", (((long)t<<16) | (unsigned)op));
 174:         sdep++;
 175:         break;
 176: 
 177:     case FCON:
 178:         t = getw(stdin);
 179:         printf("fcon %s\n", outname(numbuf));
 180:         sdep++;
 181:         break;
 182: 
 183:     case FSEL:
 184:         printf("fsel %o ", getw(stdin));
 185:         printf("%d ", getw(stdin));
 186:         printf("%d\n", getw(stdin));
 187:         break;
 188: 
 189:     case STRASG:
 190:         t = getw(stdin);
 191:         printf("strasg %o ", getw(stdin));
 192:         printf("%d\n", getw(stdin));
 193:         break;
 194: 
 195:     case NULLOP:
 196:         printf("null\n");
 197:         sdep++;
 198:         break;
 199: 
 200:     case LABEL:
 201:         printf("label %d\n", getw(stdin));
 202:         break;
 203: 
 204:     case NLABEL:
 205:         tp = outname(s);
 206:         printf("nlabel %s\n", tp);
 207:         break;
 208: 
 209:     case RLABEL:
 210:         tp = outname(s);
 211:         printf("rlabel %s\n", tp);
 212:         break;
 213: 
 214:     case BRANCH:
 215:         printf("branch %d\n", getw(stdin));
 216:         break;
 217: 
 218:     case SETREG:
 219:         printf("nreg %d\n", getw(stdin));
 220:         break;
 221: 
 222:     default:
 223:         t = getw(stdin);
 224:         if (op <=0 || op >=120) {
 225:             printf("Unknown op %d\n", op);
 226:             exit(1);
 227:         }
 228:         if (opdope[op]&BINARY)
 229:             sdep--;
 230:         if (sdep<=0)
 231:             printf("Binary expression botch\n");
 232:         if (opntab[op] == 0)
 233:             printf("op %d %o\n", op, t);
 234:         else
 235:             printf("%s %o\n", opntab[op], t);
 236:         break;
 237:     }
 238:     }
 239: }
 240: 
 241: char *
 242: outname(s)
 243: char *s;
 244: {
 245:     register char *p, c;
 246:     register n;
 247: 
 248:     p = s;
 249:     n = 0;
 250:     while (c = getc(stdin)) {
 251:         *p++ = c;
 252:         n++;
 253:     }
 254:     do {
 255:         *p++ = 0;
 256:     } while (n++ < 8);
 257:     return(s);
 258: }
 259: 
 260: error(s)
 261: char *s;
 262: {
 263:     printf("%s\n", s);
 264:     exit(1);
 265: }

Defined functions

error defined in line 260; used 2 times
main defined in line 14; never used
outname defined in line 241; used 10 times

Defined variables

cctab defined in line 10; never used
efftab defined in line 10; never used
maprel defined in line 11; never used
notrel defined in line 11; never used
regtab defined in line 10; never used
sptab defined in line 10; never used
Last modified: 1986-10-21
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