put.c

Functions

getlab            X
getnext           X
lenstr            X
listnames         X
patch             X
patch4            X
patchfil          X
pflush            X
put               X
putlab            X
putspace          X
putstr            X
word              X

Variables

obufp             X

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)put.c	5.1 (Berkeley) 6/18/85";
   9: #endif not lint
  10: 
  11: #include "whoami.h"
  12: #include "opcode.h"
  13: #include "0.h"
  14: #include "objfmt.h"
  15: #ifdef PC
  16: #   include "pc.h"
  17: #   include "align.h"
  18: #else
  19:     short   *obufp  = obuf;
  20: #endif
  21: 
  22: /*
  23:  * If DEBUG is defined, include the table
  24:  * of the printing opcode names.
  25:  */
  26: #ifdef DEBUG
  27: #include "OPnames.h"
  28: #endif
  29: 
  30: #ifdef OBJ
  31: /*
  32:  * Put is responsible for the interpreter equivalent of code
  33:  * generation.  Since the interpreter is specifically designed
  34:  * for Pascal, little work is required here.
  35:  */
  36: /*VARARGS*/
  37: put(a)
  38: {
  39:     register int *p, i;
  40:     register char *cp;
  41:     register short *sp;
  42:     register long *lp;
  43:     int n, subop, suboppr, op, oldlc;
  44:     char *string;
  45:     static int casewrd;
  46: 
  47:     /*
  48: 	 * It would be nice to do some more
  49: 	 * optimizations here.  The work
  50: 	 * done to collapse offsets in lval
  51: 	 * should be done here, the IFEQ etc
  52: 	 * relational operators could be used
  53: 	 * etc.
  54: 	 */
  55:     oldlc = (int) lc; /* its either this or change put to return a char * */
  56:     if ( !CGENNING )
  57:         /*
  58: 		 * code disabled - do nothing
  59: 		 */
  60:         return (oldlc);
  61:     p = &a;
  62:     n = *p++;
  63:     suboppr = subop = (*p >> 8) & 0377;
  64:     op = *p & 0377;
  65:     string = 0;
  66: #ifdef DEBUG
  67:     if ((cp = otext[op]) == NIL) {
  68:         printf("op= %o\n", op);
  69:         panic("put");
  70:     }
  71: #endif
  72:     switch (op) {
  73:         case O_ABORT:
  74:             cp = "*";
  75:             break;
  76:         case O_AS:
  77:             switch(p[1]) {
  78:             case 0:
  79:                 break;
  80:             case 2:
  81:                 op = O_AS2;
  82:                 n = 1;
  83:                 break;
  84:             case 4:
  85:                 op = O_AS4;
  86:                 n = 1;
  87:                 break;
  88:             case 8:
  89:                 op = O_AS8;
  90:                 n = 1;
  91:                 break;
  92:             default:
  93:                 goto pack;
  94:             }
  95: #			ifdef DEBUG
  96:                 cp = otext[op];
  97: #			endif DEBUG
  98:             break;
  99:         case O_FOR1U:
 100:         case O_FOR2U:
 101:         case O_FOR4U:
 102:         case O_FOR1D:
 103:         case O_FOR2D:
 104:         case O_FOR4D:
 105:             /* relative addressing */
 106:             p[1] -= ( unsigned ) lc + sizeof(short);
 107:             /* try to pack the jump */
 108:             if (p[1] <= 127 && p[1] >= -128) {
 109:                 suboppr = subop = p[1];
 110:                 p++;
 111:                 n--;
 112:             } else {
 113:                 /* have to allow for extra displacement */
 114:                 p[1] -= sizeof(short);
 115:             }
 116:             break;
 117:         case O_CONG:
 118:         case O_LVCON:
 119:         case O_CON:
 120:         case O_LINO:
 121:         case O_NEW:
 122:         case O_DISPOSE:
 123:         case O_DFDISP:
 124:         case O_IND:
 125:         case O_OFF:
 126:         case O_INX2:
 127:         case O_INX4:
 128:         case O_CARD:
 129:         case O_ADDT:
 130:         case O_SUBT:
 131:         case O_MULT:
 132:         case O_IN:
 133:         case O_CASE1OP:
 134:         case O_CASE2OP:
 135:         case O_CASE4OP:
 136:         case O_FRTN:
 137:         case O_WRITES:
 138:         case O_WRITEC:
 139:         case O_WRITEF:
 140:         case O_MAX:
 141:         case O_MIN:
 142:         case O_ARGV:
 143:         case O_CTTOT:
 144:         case O_INCT:
 145:         case O_RANG2:
 146:         case O_RSNG2:
 147:         case O_RANG42:
 148:         case O_RSNG42:
 149:         case O_SUCC2:
 150:         case O_SUCC24:
 151:         case O_PRED2:
 152:         case O_PRED24:
 153:             if (p[1] == 0)
 154:                 break;
 155:         case O_CON2:
 156:         case O_CON24:
 157:         pack:
 158:             if (p[1] <= 127 && p[1] >= -128) {
 159:                 suboppr = subop = p[1];
 160:                 p++;
 161:                 n--;
 162:                 if (op == O_CON2) {
 163:                     op = O_CON1;
 164: #					ifdef DEBUG
 165:                         cp = otext[O_CON1];
 166: #					endif DEBUG
 167:                 }
 168:                 if (op == O_CON24) {
 169:                     op = O_CON14;
 170: #					ifdef DEBUG
 171:                         cp = otext[O_CON14];
 172: #					endif DEBUG
 173:                 }
 174:             }
 175:             break;
 176:         case O_CON8:
 177:             {
 178:             short   *sp = (short *) (&p[1]);
 179: 
 180: #ifdef  DEBUG
 181:             if ( opt( 'k' ) )
 182:                 printf ( "%5d\tCON8\t%22.14e\n" ,
 183:                     lc - HEADER_BYTES ,
 184:                     * ( ( double * ) &p[1] ) );
 185: #endif
 186: #			ifdef DEC11
 187:                 word(op);
 188: #			else
 189:                 word(op << 8);
 190: #			endif DEC11
 191:             for ( i = 1 ; i <= 4 ; i ++ )
 192:                 word ( *sp ++ );
 193:             return ( oldlc );
 194:             }
 195:         default:
 196:             if (op >= O_REL2 && op <= O_REL84) {
 197:                 if ((i = (subop >> INDX) * 5 ) >= 30)
 198:                     i -= 30;
 199:                 else
 200:                     i += 2;
 201: #ifdef DEBUG
 202:                 string = &"IFEQ\0IFNE\0IFLT\0IFGT\0IFLE\0IFGE"[i];
 203: #endif
 204:                 suboppr = 0;
 205:             }
 206:             break;
 207:         case O_IF:
 208:         case O_TRA:
 209: /*****
 210: 			codeline = 0;
 211: *****/
 212:             /* relative addressing */
 213:             p[1] -= ( unsigned ) lc + sizeof(short);
 214:             break;
 215:         case O_CONC:
 216: #ifdef DEBUG
 217:             (string = "'x'")[1] = p[1];
 218: #endif
 219:             suboppr = 0;
 220:             op = O_CON1;
 221: #			ifdef DEBUG
 222:                 cp = otext[O_CON1];
 223: #			endif DEBUG
 224:             subop = p[1];
 225:             goto around;
 226:         case O_CONC4:
 227: #ifdef DEBUG
 228:             (string = "'x'")[1] = p[1];
 229: #endif
 230:             suboppr = 0;
 231:             op = O_CON14;
 232:             subop = p[1];
 233:             goto around;
 234:         case O_CON1:
 235:         case O_CON14:
 236:             suboppr = subop = p[1];
 237: around:
 238:             n--;
 239:             break;
 240:         case O_CASEBEG:
 241:             casewrd = 0;
 242:             return (oldlc);
 243:         case O_CASEEND:
 244:             if ((unsigned) lc & 1) {
 245:                 lc--;
 246:                 word(casewrd);
 247:             }
 248:             return (oldlc);
 249:         case O_CASE1:
 250: #ifdef DEBUG
 251:             if (opt('k'))
 252:                 printf("%5d\tCASE1\t%d\n"
 253:                     , lc - HEADER_BYTES, p[1]);
 254: #endif
 255:             /*
 256: 			 * this to build a byte size case table
 257: 			 * saving bytes across calls in casewrd
 258: 			 * so they can be put out by word()
 259: 			 */
 260:             lc++;
 261:             if ((unsigned) lc & 1)
 262: #				ifdef DEC11
 263:                     casewrd = p[1] & 0377;
 264: #				else
 265:                     casewrd = (p[1] & 0377) << 8;
 266: #				endif DEC11
 267:             else {
 268:                 lc -= 2;
 269: #				ifdef DEC11
 270:                     word(((p[1] & 0377) << 8) | casewrd);
 271: #				else
 272:                     word((p[1] & 0377) | casewrd);
 273: #				endif DEC11
 274:             }
 275:             return (oldlc);
 276:         case O_CASE2:
 277: #ifdef DEBUG
 278:             if (opt('k'))
 279:                 printf("%5d\tCASE2\t%d\n"
 280:                     , lc - HEADER_BYTES , p[1]);
 281: #endif
 282:             word(p[1]);
 283:             return (oldlc);
 284:         case O_PUSH:
 285:             lp = (long *)&p[1];
 286:             if (*lp == 0)
 287:                 return (oldlc);
 288:             /* and fall through */
 289:         case O_RANG4:
 290:         case O_RANG24:
 291:         case O_RSNG4:
 292:         case O_RSNG24:
 293:         case O_SUCC4:
 294:         case O_PRED4:
 295:             /* sub opcode optimization */
 296:             lp = (long *)&p[1];
 297:             if (*lp < 128 && *lp >= -128 && *lp != 0) {
 298:                 suboppr = subop = *lp;
 299:                 p += (sizeof(long) / sizeof(int));
 300:                 n--;
 301:             }
 302:             goto longgen;
 303:         case O_TRA4:
 304:         case O_CALL:
 305:         case O_FSAV:
 306:         case O_GOTO:
 307:         case O_NAM:
 308:         case O_READE:
 309:             /* absolute long addressing */
 310:             lp = (long *)&p[1];
 311:             *lp -= HEADER_BYTES;
 312:             goto longgen;
 313:         case O_RV1:
 314:         case O_RV14:
 315:         case O_RV2:
 316:         case O_RV24:
 317:         case O_RV4:
 318:         case O_RV8:
 319:         case O_RV:
 320:         case O_LV:
 321:             /*
 322: 			 * positive offsets represent arguments
 323: 			 * and must use "ap" display entry rather
 324: 			 * than the "fp" entry
 325: 			 */
 326:             if (p[1] >= 0) {
 327:                 subop++;
 328:                 suboppr++;
 329:             }
 330: #			ifdef PDP11
 331:                 break;
 332: #			else
 333:                 /*
 334: 			     * offsets out of range of word addressing
 335: 			     * must use long offset opcodes
 336: 			     */
 337:                 if (p[1] < SHORTADDR && p[1] >= -SHORTADDR)
 338:                     break;
 339:                 else {
 340:                 op += O_LRV - O_RV;
 341: #				ifdef DEBUG
 342:                     cp = otext[op];
 343: #				endif DEBUG
 344:                 }
 345:                 /* and fall through */
 346: #			endif PDP11
 347:         case O_BEG:
 348:         case O_NODUMP:
 349:         case O_CON4:
 350:         case O_CASE4:
 351:         longgen:
 352:             n = (n << 1) - 1;
 353:             if ( op == O_LRV ) {
 354:                 n--;
 355: #				if defined(ADDR32) && !defined(DEC11)
 356:                     p[n / 2] <<= 16;
 357: #				endif
 358:             }
 359: #ifdef DEBUG
 360:             if (opt('k')) {
 361:                 printf("%5d\t%s", lc - HEADER_BYTES, cp+1);
 362:                 if (suboppr)
 363:                     printf(":%d", suboppr);
 364:                 for ( i = 2, lp = (long *)&p[1]; i < n
 365:                     ; i += sizeof ( long )/sizeof ( short ) )
 366:                     printf( "\t%D " , *lp ++ );
 367:                 if (i == n) {
 368:                     sp = (short *)lp;
 369:                     printf( "\t%d ", *sp );
 370:                 }
 371:                 pchr ( '\n' );
 372:             }
 373: #endif
 374:             if ( op != O_CASE4 )
 375: #				ifdef DEC11
 376:                         word((op & 0377) | subop << 8);
 377: #				else
 378:                     word(op << 8 | (subop & 0377));
 379: #				endif DEC11
 380:             for ( i = 1, sp = (short *)&p[1]; i < n; i++)
 381:                 word ( *sp ++ );
 382:             return ( oldlc );
 383:     }
 384: #ifdef DEBUG
 385:     if (opt('k')) {
 386:         printf("%5d\t%s", lc - HEADER_BYTES, cp+1);
 387:         if (suboppr)
 388:             printf(":%d", suboppr);
 389:         if (string)
 390:             printf("\t%s",string);
 391:         if (n > 1)
 392:             pchr('\t');
 393:         for (i=1; i<n; i++)
 394:             printf("%d ", p[i]);
 395:         pchr('\n');
 396:     }
 397: #endif
 398:     if (op != NIL)
 399: #		ifdef DEC11
 400:             word((op & 0377) | subop << 8);
 401: #		else
 402:             word(op << 8 | (subop & 0377));
 403: #		endif DEC11
 404:     for (i=1; i<n; i++)
 405:         word(p[i]);
 406:     return (oldlc);
 407: }
 408: #endif OBJ
 409: 
 410: /*
 411:  * listnames outputs a list of enumerated type names which
 412:  * can then be selected from to output a TSCAL
 413:  * a pointer to the address in the code of the namelist
 414:  * is kept in value[ NL_ELABEL ].
 415:  */
 416: listnames(ap)
 417: 
 418:     register struct nl *ap;
 419: {
 420:     struct nl *next;
 421: #ifdef OBJ
 422:     register int oldlc;
 423: #endif
 424:     register int len;
 425:     register unsigned w;
 426:     register char *strptr;
 427: 
 428:     if ( !CGENNING )
 429:         /* code is off - do nothing */
 430:         return(NIL);
 431:     if (ap->class != TYPE)
 432:         ap = ap->type;
 433:     if (ap->value[ NL_ELABEL ] != 0) {
 434:         /* the list already exists */
 435:         return( ap -> value[ NL_ELABEL ] );
 436:     }
 437: #	ifdef OBJ
 438:         oldlc = (int) lc; /* same problem as put */
 439:         (void) put(2, O_TRA, lc);
 440:         ap->value[ NL_ELABEL ] = (int) lc;
 441: #	endif OBJ
 442: #	ifdef PC
 443:         putprintf("	.data", 0);
 444:         aligndot(A_STRUCT);
 445:         ap -> value[ NL_ELABEL ] = (int) getlab();
 446:         (void) putlab((char *) ap -> value[ NL_ELABEL ] );
 447: #	endif PC
 448:     /* number of scalars */
 449:     next = ap->type;
 450:     len = next->range[1]-next->range[0]+1;
 451: #	ifdef OBJ
 452:         (void) put(2, O_CASE2, len);
 453: #	endif OBJ
 454: #	ifdef PC
 455:         putprintf( "	.word %d" , 0 , len );
 456: #	endif PC
 457:     /* offsets of each scalar name */
 458:     len = (len+1)*sizeof(short);
 459: #	ifdef OBJ
 460:         (void) put(2, O_CASE2, len);
 461: #	endif OBJ
 462: #	ifdef PC
 463:         putprintf( "	.word %d" , 0 , len );
 464: #	endif PC
 465:     next = ap->chain;
 466:     do  {
 467:         for(strptr = next->symbol;  *strptr++;  len++)
 468:             continue;
 469:         len++;
 470: #		ifdef OBJ
 471:             (void) put(2, O_CASE2, len);
 472: #		endif OBJ
 473: #		ifdef PC
 474:             putprintf( "	.word %d" , 0 , len );
 475: #		endif PC
 476:     } while (next = next->chain);
 477:     /* list of scalar names */
 478:     strptr = getnext(ap, &next);
 479: #	ifdef OBJ
 480:         do  {
 481: #		    ifdef DEC11
 482:             w = (unsigned) *strptr;
 483: #		    else
 484:             w = *strptr << 8;
 485: #		    endif DEC11
 486:             if (!*strptr++)
 487:                 strptr = getnext(next, &next);
 488: #		    ifdef DEC11
 489:             w |= *strptr << 8;
 490: #		    else
 491:             w |= (unsigned) *strptr;
 492: #		    endif DEC11
 493:             if (!*strptr++)
 494:                 strptr = getnext(next, &next);
 495:             word((int) w);
 496:         } while (next);
 497:         /* jump over the mess */
 498:         patch((PTR_DCL) oldlc);
 499: #	endif OBJ
 500: #	ifdef PC
 501:         while ( next ) {
 502:         while ( *strptr ) {
 503:             putprintf( "	.byte	0%o" , 1 , *strptr++ );
 504:             for ( w = 2 ; ( w <= 8 ) && *strptr ; w ++ ) {
 505:             putprintf( ",0%o" , 1 , *strptr++ );
 506:             }
 507:             putprintf( "" , 0 );
 508:         }
 509:         putprintf( "	.byte	0" , 0 );
 510:         strptr = getnext( next , &next );
 511:         }
 512:         putprintf( "	.text" , 0 );
 513: #	endif PC
 514:     return( ap -> value[ NL_ELABEL ] );
 515: }
 516: 
 517: char *
 518: getnext(next, new)
 519: 
 520:     struct nl *next, **new;
 521: {
 522:     if (next != NIL) {
 523:         next = next->chain;
 524:         *new = next;
 525:     }
 526:     if (next == NLNIL)
 527:         return("");
 528: #ifdef OBJ
 529:     if (opt('k') && CGENNING )
 530:         printf("%5d\t\t\"%s\"\n", lc-HEADER_BYTES, next->symbol);
 531: #endif OBJ
 532:     return(next->symbol);
 533: }
 534: 
 535: #ifdef OBJ
 536: /*
 537:  * Putspace puts out a table
 538:  * of nothing to leave space
 539:  * for the case branch table e.g.
 540:  */
 541: putspace(n)
 542:     int n;
 543: {
 544:     register i;
 545: 
 546:     if ( !CGENNING )
 547:         /*
 548: 		 * code disabled - do nothing
 549: 		 */
 550:         return;
 551: #ifdef DEBUG
 552:     if (opt('k'))
 553:         printf("%5d\t.=.+%d\n", lc - HEADER_BYTES, n);
 554: #endif
 555:     for (i = even(n); i > 0; i -= 2)
 556:         word(0);
 557: }
 558: 
 559: putstr(sptr, padding)
 560: 
 561:     char *sptr;
 562:     int padding;
 563: {
 564:     register unsigned short w;
 565:     register char *strptr = sptr;
 566:     register int pad = padding;
 567: 
 568:     if ( !CGENNING )
 569:         /*
 570: 		 * code disabled - do nothing
 571: 		 */
 572:         return;
 573: #ifdef DEBUG
 574:     if (opt('k'))
 575:         printf("%5d\t\t\"%s\"\n", lc-HEADER_BYTES, strptr);
 576: #endif
 577:     if (pad == 0) {
 578:         do  {
 579: #			ifdef DEC11
 580:                 w = (unsigned short) * strptr;
 581: #			else
 582:                 w = (unsigned short)*strptr<<8;
 583: #			endif DEC11
 584:             if (w)
 585: #				ifdef DEC11
 586:                     w |= *++strptr << 8;
 587: #				else
 588:                     w |= *++strptr;
 589: #				endif DEC11
 590:             word((int) w);
 591:         } while (*strptr++);
 592:     } else {
 593: #		ifdef DEC11
 594:             do  {
 595:                 w = (unsigned short) * strptr;
 596:                 if (w) {
 597:                     if (*++strptr)
 598:                         w |= *strptr << 8;
 599:                     else {
 600:                         w |= ' ' << 8;
 601:                         pad--;
 602:                     }
 603:                     word((int) w);
 604:                 }
 605:             } while (*strptr++);
 606: #		else
 607:             do  {
 608:                 w = (unsigned short)*strptr<<8;
 609:                 if (w) {
 610:                     if (*++strptr)
 611:                         w |= *strptr;
 612:                     else {
 613:                         w |= ' ';
 614:                         pad--;
 615:                     }
 616:                     word(w);
 617:                 }
 618:             } while (*strptr++);
 619: #		endif DEC11
 620:         while (pad > 1) {
 621: #			ifdef DEC11
 622:                 word(' ' | (' ' << 8));
 623: #			else
 624:                 word((' ' << 8) | ' ');
 625: #			endif DEC11
 626:             pad -= 2;
 627:         }
 628:         if (pad == 1)
 629: #			ifdef DEC11
 630:                 word(' ');
 631: #			else
 632:                 word(' ' << 8);
 633: #			endif DEC11
 634:         else
 635:             word(0);
 636:     }
 637: }
 638: #endif OBJ
 639: 
 640: #ifndef PC
 641: lenstr(sptr, padding)
 642: 
 643:     char *sptr;
 644:     int padding;
 645: 
 646: {
 647:     register int cnt;
 648:     register char *strptr = sptr;
 649: 
 650:     cnt = padding;
 651:     do  {
 652:         cnt++;
 653:     } while (*strptr++);
 654:     return((++cnt) & ~1);
 655: }
 656: #endif
 657: 
 658: /*
 659:  * Patch repairs the branch
 660:  * at location loc to come
 661:  * to the current location.
 662:  *	for PC, this puts down the label
 663:  *	and the branch just references that label.
 664:  *	lets here it for two pass assemblers.
 665:  */
 666: patch(loc)
 667:     PTR_DCL loc;
 668: {
 669: 
 670: #	ifdef OBJ
 671:         patchfil(loc, (long)(lc-loc-2), 1);
 672: #	endif OBJ
 673: #	ifdef PC
 674:         (void) putlab((char *) loc );
 675: #	endif PC
 676: }
 677: 
 678: #ifdef OBJ
 679: patch4(loc)
 680: PTR_DCL loc;
 681: {
 682:     patchfil(loc, (long)(lc - HEADER_BYTES), 2);
 683: }
 684: 
 685: /*
 686:  * Patchfil makes loc+2 have jmploc
 687:  * as its contents.
 688:  */
 689: patchfil(loc, jmploc, words)
 690:     PTR_DCL loc;
 691:     long jmploc;
 692:     int words;
 693: {
 694:     register i;
 695:     extern long lseek();
 696:     short val;
 697: 
 698:     if ( !CGENNING )
 699:         return;
 700:     if (loc > (unsigned) lc)
 701:         panic("patchfil");
 702: #ifdef DEBUG
 703:     if (opt('k'))
 704:         printf("\tpatch %u %D\n", loc - HEADER_BYTES, jmploc);
 705: #endif
 706:     val = jmploc;
 707:     do {
 708: #		ifndef DEC11
 709:             if (words > 1)
 710:                 val = jmploc >> 16;
 711:             else
 712:                 val = jmploc;
 713: #		endif DEC11
 714:         i = ((unsigned) loc + 2 - ((unsigned) lc & ~01777))/2;
 715:         if (i >= 0 && i < 1024) {
 716:             obuf[i] = val;
 717:         } else {
 718:             (void) lseek(ofil, (long) loc+2, 0);
 719:             write(ofil, (char *) (&val), 2);
 720:             (void) lseek(ofil, (long) 0, 2);
 721:         }
 722:         loc += 2;
 723: #		ifdef DEC11
 724:             val = jmploc >> 16;
 725: #		endif DEC11
 726:     } while (--words);
 727: }
 728: 
 729: /*
 730:  * Put the word o into the code
 731:  */
 732: word(o)
 733:     int o;
 734: {
 735: 
 736:     *obufp = o;
 737:     obufp++;
 738:     lc += 2;
 739:     if (obufp >= obuf+512)
 740:         pflush();
 741: }
 742: 
 743: extern char *obj;
 744: /*
 745:  * Flush the code buffer
 746:  */
 747: pflush()
 748: {
 749:     register i;
 750: 
 751:     i = (obufp - ( ( short * ) obuf ) ) * 2;
 752:     if (i != 0 && write(ofil, (char *) obuf, i) != i)
 753:         perror(obj), pexit(DIED);
 754:     obufp = obuf;
 755: }
 756: #endif OBJ
 757: 
 758: /*
 759:  * Getlab - returns the location counter.
 760:  * included here for the eventual code generator.
 761:  *	for PC, thank you!
 762:  */
 763: char *
 764: getlab()
 765: {
 766: #	ifdef OBJ
 767: 
 768:         return (lc);
 769: #	endif OBJ
 770: #	ifdef PC
 771:         static long lastlabel;
 772: 
 773:         return ( (char *) ++lastlabel );
 774: #	endif PC
 775: }
 776: 
 777: /*
 778:  * Putlab - lay down a label.
 779:  *	for PC, just print the label name with a colon after it.
 780:  */
 781: char *
 782: putlab(l)
 783:     char *l;
 784: {
 785: 
 786: #	ifdef PC
 787:         putprintf( PREFIXFORMAT , 1 , (int) LABELPREFIX , (int) l );
 788:         putprintf( ":" , 0 );
 789: #	endif PC
 790:     return (l);
 791: }