git.gag.com Git - fw/sdcc/blob - as/z80/asmain.c

   1 /* asmain.c */
   2
   3 /*
   4  * (C) Copyright 1989-1995
   5  * All Rights Reserved
   6  *
   7  * Alan R. Baldwin
   8  * 721 Berkeley St.
   9  * Kent, Ohio  44240
  10  */
  11
  12 /*
  13  * Extensions: P. Felber
  14  */
  15
  16 #include <stdio.h>
  17 #include <setjmp.h>
  18 #include <string.h>
  19
  20 #ifdef SDK
  21 #include <stdlib.h>
  22 #include <math.h>
  23 #undef HUGE
  24 #endif
  25 #include "asm.h"
  26 #include "z80.h"
  27
  28 /*)Module       asmain.c
  29  *
  30  *      The module asmain.c includes the command argument parser,
  31  *      the three pass sequencer, and the machine independent
  32  *      assembler parsing code.
  33  *
  34  *      asmain.c contains the following functions:
  35  *              VOID    main(argc, argv)
  36  *              VOID    asexit()
  37  *              VOID    asmbl()
  38  *              FILE *  afile(fn, ft, wf)
  39  *              VOID    newdot(nap)
  40  *              VOID    phase(ap, a)
  41  *              VOID    usage()
  42  *
  43  *      asmain.c contains the array char *usetxt[] which
  44  *      references the usage text strings printed by usage().
  45  */
  46
  47 /*)Function     VOID    main(argc, argv)
  48  *
  49  *              int     argc            argument count
  50  *              char *  argv            array of pointers to argument strings
  51  *
  52  *      The function main() is the entry point to the assembler.
  53  *      The purpose of main() is to (1) parse the command line
  54  *      arguments for options and source file specifications and
  55  *      (2) to process the source files through the 3 pass assembler.
  56  *      Before each assembler pass various variables are initialized
  57  *      and source files are rewound to their beginning.  During each
  58  *      assembler pass each assembler-source text line is processed.
  59  *      After each assembler pass the assembler information is flushed
  60  *      to any opened output files and the if-else-endif processing
  61  *      is checked for proper termination.
  62  *
  63  *      The function main() is also responsible for opening all
  64  *      output files (REL, LST, and SYM), sequencing the global (-g)
  65  *      and all-global (-a) variable definitions, and dumping the
  66  *      REL file header information.
  67  *
  68  *      local variables:
  69  *              char *  p               pointer to argument string
  70  *              int     c               character from argument string
  71  *              int     i               argument loop counter
  72  *              area *  ap              pointer to area structure
  73  *
  74  *      global variables:
  75  *              int     aflag           -a, make all symbols global flag
  76  *              char    afn[]           afile() constructed filespec
  77  *              area *  areap           pointer to an area structure
  78  *              int     cb[]            array of assembler output values
  79  *              int     cbt[]           array of assembler relocation types
  80  *                                      describing the data in cb[]
  81  *              int     cfile           current file handle index
  82  *                                      of input assembly files
  83  *              int *   cp              pointer to assembler output array cb[]
  84  *              int *   cpt             pointer to assembler relocation type
  85  *                                      output array cbt[]
  86  *              char    eb[]            array of generated error codes
  87  *              char *  ep              pointer into error list array eb[]
  88  *              int     fflag           -f(f), relocations flagged flag
  89  *              int     flevel          IF-ELSE-ENDIF flag will be non
  90  *                                      zero for false conditional case
  91  *              Addr_T  fuzz            tracks pass to pass changes in the
  92  *                                      address of symbols caused by
  93  *                                      variable length instruction formats
  94  *              int     gflag           -g, make undefined symbols global flag
  95  *              char    ib[]            assembler-source text line
  96  *              int     inpfil          count of assembler
  97  *                                      input files specified
  98  *              int     ifcnd[]         array of IF statement condition
  99  *                                      values (0 = FALSE) indexed by tlevel
 100  *              int     iflvl[]         array of IF-ELSE-ENDIF flevel
 101  *                                      values indexed by tlevel
 102  *              int     incfil          current file handle index
 103  *                                      for include files
 104  *              char *  ip              pointer into the assembler-source
 105  *                                      text line in ib[]
 106  *              jmp_buf jump_env        compiler dependent structure
 107  *                                      used by setjmp() and longjmp()
 108  *              int     lflag           -l, generate listing flag
 109  *              int     line            current assembler source
 110  *                                      line number
 111  *              int     lop             current line number on page
 112  *              int     oflag           -o, generate relocatable output flag
 113  *              int     page            current page number
 114  *              int     pflag           enable listing pagination
 115  *              int     pass            assembler pass number
 116  *              int     radix           current number conversion radix:
 117  *                                      2 (binary), 8 (octal), 10 (decimal),
 118  *                                      16 (hexadecimal)
 119  *              int     sflag           -s, generate symbol table flag
 120  *              char    srcfn[][]       array of source file names
 121  *              int     srcline[]       current source file line
 122  *              char    stb[]           Subtitle string buffer
 123  *              sym *   symp            pointer to a symbol structure
 124  *              int     tlevel          current conditional level
 125  *              int     xflag           -x, listing radix flag
 126  *              FILE *  lfp             list output file handle
 127  *              FILE *  ofp             relocation output file handle
 128  *              FILE *  tfp             symbol table output file handle
 129  *              FILE *  sfp[]           array of assembler-source file handles
 130  *
 131  *      called functions:
 132  *              FILE *  afile()         asmain.c
 133  *              VOID    allglob()       assym.c
 134  *              VOID    asexit()        asmain.c
 135  *              VOID    diag()          assubr.c
 136  *              VOID    err()           assubr.c
 137  *              int     fprintf()       c-library
 138  *              int     getline()       aslex.c
 139  *              VOID    list()          aslist.c
 140  *              VOID    lstsym()        aslist.c
 141  *              VOID    minit()         ___mch.c
 142  *              VOID    newdot()        asmain.c
 143  *              VOID    outchk()        asout.c
 144  *              VOID    outgsd()        asout.c
 145  *              int     rewind()        c-library
 146  *              int     setjmp()        c-library
 147  *              VOID    symglob()       assym.c
 148  *              VOID    syminit()       assym.c
 149  *              VOID    usage()         asmain.c
 150  *
 151  *      side effects:
 152  *              Completion of main() completes the assembly process.
 153  *              REL, LST, and/or SYM files may be generated.
 154  */
 155
 156 int
 157 main(int argc, char **argv)
 158 {
 159         register char *p;
 160         register int c, i;
 161         struct area *ap;
 162
 163 #ifdef SDK
 164         inpfil = -2;
 165 #else /* SDK */
 166         fprintf(stdout, "\n");
 167         inpfil = -1;
 168 #endif /* SDK */
 169         pflag = 1;
 170         for (i=1; i<argc; ++i) {
 171                 p = argv[i];
 172                 if (*p == '-') {
 173                         if (inpfil >= 0)
 174                                 usage();
 175                         ++p;
 176                         while ((c = *p++) != 0)
 177                                 switch(c) {
 178
 179                                 case 'a':
 180                                 case 'A':
 181                                         ++aflag;
 182                                         break;
 183
 184                                 case 'g':
 185                                 case 'G':
 186                                         ++gflag;
 187                                         break;
 188
 189                                 case 'l':
 190                                 case 'L':
 191                                         ++lflag;
 192                                         break;
 193
 194                                 case 'o':
 195                                 case 'O':
 196                                         ++oflag;
 197                                         break;
 198
 199                                 case 's':
 200                                 case 'S':
 201                                         ++sflag;
 202                                         break;
 203
 204                                 case 'p':
 205                                 case 'P':
 206                                         pflag = 0;
 207                                         break;
 208
 209                                 case 'x':
 210                                 case 'X':
 211                                         xflag = 0;
 212                                         break;
 213
 214                                 case 'q':
 215                                 case 'Q':
 216                                         xflag = 1;
 217                                         break;
 218
 219                                 case 'd':
 220                                 case 'D':
 221                                         xflag = 2;
 222                                         break;
 223
 224                                 case 'f':
 225                                 case 'F':
 226                                         ++fflag;
 227                                         break;
 228
 229                                 default:
 230                                         usage();
 231                                 }
 232                 } else {
 233 #ifdef SDK
 234                         if(inpfil != -2) {
 235 #endif /* SDK */
 236                         if (++inpfil == MAXFIL) {
 237                                 fprintf(stderr, "too many input files\n");
 238                                 asexit(1);
 239                         }
 240                         sfp[inpfil] = afile(p, "", 0);
 241                         strcpy(srcfn[inpfil],afn);
 242 #ifdef SDK
 243                         } else
 244                                 inpfil++;
 245                         if (inpfil == -1) {
 246                                 if (lflag)
 247                                         lfp = afile(p, "lst", 1);
 248                                 if (oflag)
 249                                         ofp = afile(p, "", 1);
 250                                 if (sflag)
 251                                         tfp = afile(p, "sym", 1);
 252                         }
 253 #else /* SDK */
 254                         if (inpfil == 0) {
 255                                 if (lflag)
 256                                         lfp = afile(p, "LST", 1);
 257                                 if (oflag)
 258                                         ofp = afile(p, "REL", 1);
 259                                 if (sflag)
 260                                         tfp = afile(p, "SYM", 1);
 261                         }
 262 #endif /* SDK */
 263                 }
 264         }
 265         if (inpfil < 0)
 266                 usage();
 267         syminit();
 268         for (pass=0; pass<3; ++pass) {
 269                 if (gflag && pass == 1)
 270                         symglob();
 271                 if (aflag && pass == 1)
 272                         allglob();
 273                 if (oflag && pass == 2)
 274                         outgsd();
 275                 flevel = 0;
 276                 tlevel = 0;
 277                 ifcnd[0] = 0;
 278                 iflvl[0] = 0;
 279                 radix = 10;
 280                 srcline[0] = 0;
 281                 page = 0;
 282                 stb[0] = 0;
 283                 lop  = NLPP;
 284                 cfile = 0;
 285                 incfil = -1;
 286                 for (i = 0; i <= inpfil; i++)
 287                         rewind(sfp[i]);
 288                 ap = areap;
 289                 while (ap) {
 290                         ap->a_fuzz = 0;
 291                         ap->a_size = 0;
 292                         ap = ap->a_ap;
 293                 }
 294                 fuzz = 0;
 295                 dot.s_addr = 0;
 296                 dot.s_area = &dca;
 297                 symp = &dot;
 298                 minit();
 299                 while (getline()) {
 300                         cp = cb;
 301                         cpt = cbt;
 302                         ep = eb;
 303                         ip = ib;
 304                         if (setjmp(jump_env) == 0)
 305                                 asmbl();
 306                         if (pass == 2) {
 307                                 diag();
 308                                 list();
 309                         }
 310                 }
 311                 newdot(dot.s_area); /* Flush area info */
 312                 if (flevel || tlevel)
 313                         err('i');
 314         }
 315         if (oflag)
 316                 outchk(HUGE, HUGE);  /* Flush */
 317         if (sflag) {
 318                 lstsym(tfp);
 319         } else
 320         if (lflag) {
 321                 lstsym(lfp);
 322         }
 323         asexit(aserr != 0);
 324         /* Never reached */
 325         return 0;
 326 }
 327
 328 /*)Function     VOID    asexit(i)
 329  *
 330  *                      int     i       exit code
 331  *
 332  *      The function asexit() explicitly closes all open
 333  *      files and then terminates the program.
 334  *
 335  *      local variables:
 336  *              int     j               loop counter
 337  *
 338  *      global variables:
 339  *              FILE *  ifp[]           array of include-file file handles
 340  *              FILE *  lfp             list output file handle
 341  *              FILE *  ofp             relocation output file handle
 342  *              FILE *  tfp             symbol table output file handle
 343  *              FILE *  sfp[]           array of assembler-source file handles
 344  *
 345  *      functions called:
 346  *              int     fclose()        c-library
 347  *              VOID    exit()          c-library
 348  *
 349  *      side effects:
 350  *              All files closed. Program terminates.
 351  */
 352
 353 VOID
 354 asexit(i)
 355 int i;
 356 {
 357         int j;
 358
 359         if (lfp != NULL) fclose(lfp);
 360         if (ofp != NULL) fclose(ofp);
 361         if (tfp != NULL) fclose(tfp);
 362
 363         for (j=0; j<MAXFIL && sfp[j] != NULL; j++) {
 364                 fclose(sfp[j]);
 365         }
 366
 367         for (j=0; j<MAXINC && ifp[j] != NULL; j++) {
 368                 fclose(ifp[j]);
 369         }
 370
 371         exit(i);
 372 }
 373
 374 /*)Function     VOID    asmbl()
 375  *
 376  *      The function asmbl() scans the assembler-source text for
 377  *      (1) labels, global labels, equates, global equates, and local
 378  *      symbols, (2) .if, .else, .endif, and .page directives,
 379  *      (3) machine independent assembler directives, and (4) machine
 380  *      dependent mnemonics.
 381  *
 382  *      local variables:
 383  *              mne *   mp              pointer to a mne structure
 384  *              sym *   sp              pointer to a sym structure
 385  *              tsym *  tp              pointer to a tsym structure
 386  *              int     c               character from assembler-source
 387  *                                      text line
 388  *              area *  ap              pointer to an area structure
 389  *              expr    e1              expression structure
 390  *              char    id[]            id string
 391  *              char    opt[]           options string
 392  *              char    fn[]            filename string
 393  *              char *  p               pointer into a string
 394  *              int     d               temporary value
 395  *              int     n               temporary value
 396  *              int     uaf             user area options flag
 397  *              int     uf              area options
 398  *
 399  *      global variables:
 400  *              area *  areap           pointer to an area structure
 401  *              char    ctype[]         array of character types, one per
 402  *                                      ASCII character
 403  *              int     flevel          IF-ELSE-ENDIF flag will be non
 404  *                                      zero for false conditional case
 405  *              Addr_T  fuzz            tracks pass to pass changes in the
 406  *                                      address of symbols caused by
 407  *                                      variable length instruction formats
 408  *              int     ifcnd[]         array of IF statement condition
 409  *                                      values (0 = FALSE) indexed by tlevel
 410  *              int     iflvl[]         array of IF-ELSE-ENDIF flevel
 411  *                                      values indexed by tlevel
 412  *              FILE *  ifp[]           array of include-file file handles
 413  *              char    incfn[][]       array of include file names
 414  *              int     incline[]       current include file line
 415  *              int     incfil          current file handle index
 416  *                                      for include files
 417  *              Addr_T  laddr           address of current assembler line
 418  *                                      or value of .if argument
 419  *              int     lmode           listing mode
 420  *              int     lop             current line number on page
 421  *              char    module[]        module name string
 422  *              int     pass            assembler pass number
 423  *              int     radix           current number conversion radix:
 424  *                                      2 (binary), 8 (octal), 10 (decimal),
 425  *                                      16 (hexadecimal)
 426  *              char    stb[]           Subtitle string buffer
 427  *              sym *   symp            pointer to a symbol structure
 428  *              char    tb[]            Title string buffer
 429  *              int     tlevel          current conditional level
 430  *
 431  *      functions called:
 432  *              Addr_T  absexpr()       asexpr.c
 433  *              area *  alookup()       assym.c
 434  *              VOID    clrexpr()       asexpr.c
 435  *              int     digit()         asexpr.c
 436  *              char    endline()       aslex.c
 437  *              VOID    err()           assubr.c
 438  *              VOID    expr()          asexpr.c
 439  *              FILE *  fopen()         c-library
 440  *              char    get()           aslex.c
 441  *              VOID    getid()         aslex.c
 442  *              int     getmap()        aslex.c
 443  *              char    getnb()         aslex.c
 444  *              VOID    getst()         aslex.c
 445  *              sym *   lookup()        assym.c
 446  *              VOID    machine()       ___mch.c
 447  *              mne *   mlookup()       assym.c
 448  *              int     more()          aslex.c
 449  *              VOID *  new()           assym.c
 450  *              VOID    newdot()        asmain.c
 451  *              VOID    outall()        asout.c
 452  *              VOID    outab()         asout.c
 453  *              VOID    outchk()        asout.c
 454  *              VOID    outrb()         asout.c
 455  *              VOID    outrw()         asout.c
 456  *              VOID    phase()         asmain.c
 457  *              VOID    qerr()          assubr.c
 458  *              char *  strcpy()        c-library
 459  *              char *  strncpy()       c-library
 460  *              VOID    unget()         aslex.c
 461  */
 462
 463 VOID
 464 asmbl()
 465 {
 466         register struct mne *mp;
 467         register struct sym *sp;
 468         register struct tsym *tp;
 469         register int c;
 470         struct area  *ap;
 471         struct expr e1;
 472         char id[NCPS];
 473         char opt[NCPS];
 474         char fn[FILSPC];
 475         char *p;
 476         int d, n, uaf, uf;
 477
 478 #ifdef SDK
 479         double f1, f2;
 480         unsigned int mantissa, exponent;
 481         const signed char readbuffer[80];
 482 #endif
 483         laddr = dot.s_addr;
 484         lmode = SLIST;
 485 loop:
 486         if ((c=endline()) == 0) { return; }
 487         /*
 488          * If the first character is a digit then assume
 489          * a local symbol is being specified.  The symbol
 490          * must end with $: to be valid.
 491          *      pass 0:
 492          *              Construct a tsym structure at the first
 493          *              occurance of the symbol.  Flag the symbol
 494          *              as multiply defined if not the first occurance.
 495          *      pass 1:
 496          *              Load area, address, and fuzz values
 497          *              into structure tsym.
 498          *      pass 2:
 499          *              Check for assembler phase error and
 500          *              multiply defined error.
 501          */
 502         if (ctype[c] & DIGIT) {
 503                 if (flevel)
 504                         return;
 505                 n = 0;
 506                 while ((d = digit(c, 10)) >= 0) {
 507                         n = 10*n + d;
 508                         c = get();
 509                 }
 510                 if (c != '$' || get() != ':')
 511                         qerr();
 512                 tp = symp->s_tsym;
 513                 if (pass == 0) {
 514                         while (tp) {
 515                                 if (n == tp->t_num) {
 516                                         tp->t_flg |= S_MDF;
 517                                         break;
 518                                 }
 519                                 tp = tp->t_lnk;
 520                         }
 521                         if (tp == NULL) {
 522                                 tp=(struct tsym *) new (sizeof(struct tsym));
 523                                 tp->t_lnk = symp->s_tsym;
 524                                 tp->t_num = n;
 525                                 tp->t_flg = 0;
 526                                 tp->t_area = dot.s_area;
 527                                 tp->t_addr = dot.s_addr;
 528                                 symp->s_tsym = tp;
 529                         }
 530                 } else {
 531                         while (tp) {
 532                                 if (n == tp->t_num) {
 533                                         break;
 534                                 }
 535                                 tp = tp->t_lnk;
 536                         }
 537                         if (tp) {
 538                                 if (pass == 1) {
 539                                         fuzz = tp->t_addr - dot.s_addr;
 540                                         tp->t_area = dot.s_area;
 541                                         tp->t_addr = dot.s_addr;
 542                                 } else {
 543                                         phase(tp->t_area, tp->t_addr);
 544                                         if (tp->t_flg & S_MDF)
 545                                                 err('m');
 546                                 }
 547                         } else {
 548                                 err('u');
 549                         }
 550                 }
 551                 lmode = ALIST;
 552                 goto loop;
 553         }
 554         /*
 555          * If the first character is a letter then assume a lable,
 556          * symbol, assembler directive, or assembler mnemonic is
 557          * being processed.
 558          */
 559         if ((ctype[c] & LETTER) == 0)
 560                 if (flevel) {
 561                         return;
 562                 } else {
 563                         qerr();
 564                 }
 565         getid(id, c);
 566         c = getnb();
 567         /*
 568          * If the next character is a : then a label is being processed.
 569          * A double :: defines a global label.  If this is new label
 570          * then create a symbol structure.
 571          *      pass 0:
 572          *              Flag multiply defined labels.
 573          *      pass 1:
 574          *              Load area, address, and fuzz values
 575          *              into structure symp.
 576          *      pass 2:
 577          *              Check for assembler phase error and
 578          *              multiply defined error.
 579          */
 580         if (c == ':') {
 581                 if (flevel)
 582                         return;
 583                 if ((c = get()) != ':') {
 584                         unget(c);
 585                         c = 0;
 586                 }
 587                 symp = lookup(id);
 588                 if (symp == &dot)
 589                         err('.');
 590                 if (pass == 0)
 591                         if ((symp->s_type != S_NEW) &&
 592                            ((symp->s_flag & S_ASG) == 0))
 593                                 symp->s_flag |= S_MDF;
 594                 if (pass != 2) {
 595                         fuzz = symp->s_addr - dot.s_addr;
 596                         symp->s_type = S_USER;
 597                         symp->s_area = dot.s_area;
 598                         symp->s_addr = dot.s_addr;
 599                 } else {
 600                         if (symp->s_flag & S_MDF)
 601                                 err('m');
 602                         phase(symp->s_area, symp->s_addr);
 603                 }
 604                 if (c) {
 605                         symp->s_flag |= S_GBL;
 606                 }
 607                 lmode = ALIST;
 608                 goto loop;
 609         }
 610         /*
 611          * If the next character is a = then an equate is being processed.
 612          * A double == defines a global equate.  If this is new variable
 613          * then create a symbol structure.
 614          */
 615         if (c == '=') {
 616                 if (flevel)
 617                         return;
 618                 if ((c = get()) != '=') {
 619                         unget(c);
 620                         c = 0;
 621                 }
 622                 clrexpr(&e1);
 623                 expr(&e1, 0);
 624                 sp = lookup(id);
 625                 if (sp == &dot) {
 626                         outall();
 627                         if (e1.e_flag || e1.e_base.e_ap != dot.s_area)
 628                                 err('.');
 629                 } else
 630                 if (sp->s_type != S_NEW && (sp->s_flag & S_ASG) == 0) {
 631                         err('m');
 632                 }
 633                 sp->s_type = S_USER;
 634                 sp->s_area = e1.e_base.e_ap;
 635                 sp->s_addr = laddr = e1.e_addr;
 636                 sp->s_flag |= S_ASG;
 637                 if (c) {
 638                         sp->s_flag |= S_GBL;
 639                 }
 640                 lmode = ELIST;
 641                 goto loop;
 642         }
 643         unget(c);
 644         lmode = flevel ? SLIST : CLIST;
 645         if ((mp = mlookup(id)) == NULL) {
 646                 if (!flevel)
 647                         err('o');
 648                 return;
 649         }
 650         /*
 651          * If we have gotten this far then we have found an
 652          * assembler directive or an assembler mnemonic.
 653          *
 654          * Check for .if, .else, .endif, and .page directives
 655          * which are not controlled by the conditional flags
 656          */
 657         switch (mp->m_type) {
 658
 659         case S_IF:
 660                 n = absexpr();
 661                 if (tlevel < MAXIF) {
 662                         ++tlevel;
 663                         ifcnd[tlevel] = n;
 664                         iflvl[tlevel] = flevel;
 665                         if (n == 0) {
 666                                 ++flevel;
 667                         }
 668                 } else {
 669                         err('i');
 670                 }
 671                 lmode = ELIST;
 672                 laddr = n;
 673                 return;
 674
 675         case S_ELSE:
 676                 if (ifcnd[tlevel]) {
 677                         if (++flevel > (iflvl[tlevel]+1)) {
 678                                 err('i');
 679                         }
 680                 } else {
 681                         if (--flevel < iflvl[tlevel]) {
 682                                 err('i');
 683                         }
 684                 }
 685                 lmode = SLIST;
 686                 return;
 687
 688         case S_ENDIF:
 689                 if (tlevel) {
 690                         flevel = iflvl[tlevel--];
 691                 } else {
 692                         err('i');
 693                 }
 694                 lmode = SLIST;
 695                 return;
 696
 697         case S_PAGE:
 698                 lop = NLPP;
 699                 lmode = NLIST;
 700                 return;
 701
 702         default:
 703                 break;
 704         }
 705         if (flevel)
 706                 return;
 707         /*
 708          * If we are not in a false state for .if/.else then
 709          * process the assembler directives here.
 710          */
 711         switch (mp->m_type) {
 712
 713         case S_EVEN:
 714                 outall();
 715                 laddr = dot.s_addr = (dot.s_addr + 1) & ~1;
 716                 lmode = ALIST;
 717                 break;
 718
 719         case S_ODD:
 720                 outall();
 721                 laddr = dot.s_addr |= 1;
 722                 lmode = ALIST;
 723                 break;
 724
 725         case S_BYTE:
 726         case S_WORD:
 727                 do {
 728                         clrexpr(&e1);
 729                         expr(&e1, 0);
 730                         if (mp->m_type == S_BYTE) {
 731                                 outrb(&e1, R_NORM);
 732                         } else {
 733                                 outrw(&e1, R_NORM);
 734                         }
 735                 } while ((c = getnb()) == ',');
 736                 unget(c);
 737                 break;
 738
 739 #ifdef SDK
 740         case S_FLOAT:
 741                 do {
 742                         getid( readbuffer, ' ' ); /* Hack :) */
 743                         if ((c=getnb())=='.')
 744                           {
 745                                   getid(&readbuffer[strlen(readbuffer)],'.');
 746                           }
 747                         else
 748                             unget(c);
 749
 750                         f1 = strtod( readbuffer, (char **)NULL );
 751                         /* Convert f1 to a gb-lib type fp
 752                          * 24 bit mantissa followed by 7 bit exp and 1 bit sign
 753                         */
 754
 755                         if (f1!=0)
 756                           {
 757
 758                                   f2 = floor(log(fabs(f1))/log(2))+1;
 759                                   mantissa = (unsigned int) ((0x1000000*fabs(f1))/exp(f2*log(2))) ;
 760                                   mantissa &=0xffffff;
 761                                   exponent = (unsigned int) (f2 + 0x40) ;
 762                                   if (f1<0)
 763                                       exponent |=0x80;
 764                           }
 765
 766                         else
 767                           {
 768                                   mantissa=0;
 769                                   exponent=0;
 770                           }
 771
 772                         outab(mantissa&0xff);
 773                         outab((mantissa>>8)&0xff);
 774                         outab((mantissa>>16)&0xff);
 775                         outab(exponent&0xff);
 776
 777                 } while ((c = getnb()) == ',');
 778                 unget(c);
 779                 break;
 780 #endif
 781
 782         case S_ASCII:
 783         case S_ASCIZ:
 784                 if ((d = getnb()) == '\0')
 785                         qerr();
 786                 while ((c = getmap(d)) >= 0)
 787                         outab(c);
 788                 if (mp->m_type == S_ASCIZ)
 789                         outab(0);
 790                 break;
 791
 792         case S_ASCIS:
 793                 if ((d = getnb()) == '\0')
 794                         qerr();
 795                 c = getmap(d);
 796                 while (c >= 0) {
 797                         if ((n = getmap(d)) >= 0) {
 798                                 outab(c);
 799                         } else {
 800                                 outab(c | 0x80);
 801                         }
 802                         c = n;
 803                 }
 804                 break;
 805
 806         case S_BLK:
 807                 clrexpr(&e1);
 808                 expr(&e1, 0);
 809                 dot.s_addr += e1.e_addr*mp->m_valu;
 810                 outchk(HUGE,HUGE);
 811                 lmode = BLIST;
 812                 break;
 813
 814         case S_TITLE:
 815                 p = tb;
 816                 if ((c = getnb()) != 0) {
 817                         do {
 818                                 if (p < &tb[NTITL-1])
 819                                         *p++ = c;
 820                         } while ((c = get()) != 0);
 821                 }
 822                 *p = 0;
 823                 unget(c);
 824                 lmode = SLIST;
 825                 break;
 826
 827         case S_SBTL:
 828                 p = stb;
 829                 if ((c = getnb()) != 0) {
 830                         do {
 831                                 if (p < &stb[NSBTL-1])
 832                                         *p++ = c;
 833                         } while ((c = get()) != 0);
 834                 }
 835                 *p = 0;
 836                 unget(c);
 837                 lmode = SLIST;
 838                 break;
 839
 840         case S_MODUL:
 841                 getst(id, -1);
 842                 if (pass == 0) {
 843                         if (module[0]) {
 844                                 err('m');
 845                         } else {
 846                                 strncpy(module, id, NCPS);
 847                         }
 848                 }
 849                 lmode = SLIST;
 850                 break;
 851
 852         case S_GLOBL:
 853                 do {
 854                         getid(id, -1);
 855                         sp = lookup(id);
 856                         sp->s_flag |= S_GBL;
 857                 } while ((c = getnb()) == ',');
 858                 unget(c);
 859                 lmode = SLIST;
 860                 break;
 861
 862         case S_DAREA:
 863                 getid(id, -1);
 864                 uaf = 0;
 865                 uf  = A_CON|A_REL;
 866                 if ((c = getnb()) == '(') {
 867                         do {
 868                                 getid(opt, -1);
 869                                 mp = mlookup(opt);
 870                                 if (mp && mp->m_type == S_ATYP) {
 871                                         ++uaf;
 872                                         uf |= mp->m_valu;
 873                                 } else {
 874                                         err('u');
 875                                 }
 876                         } while ((c = getnb()) == ',');
 877                         if (c != ')')
 878                                 qerr();
 879                 } else {
 880                         unget(c);
 881                 }
 882                 if ((ap = alookup(id)) != NULL) {
 883                         if (uaf && uf != ap->a_flag)
 884                                 err('m');
 885                 } else {
 886                         ap = (struct area *) new (sizeof(struct area));
 887                         ap->a_ap = areap;
 888                         strncpy(ap->a_id, id, NCPS);
 889                         ap->a_ref = areap->a_ref + 1;
 890                         ap->a_size = 0;
 891                         ap->a_fuzz = 0;
 892                         ap->a_flag = uaf ? uf : (A_CON|A_REL);
 893                         areap = ap;
 894                 }
 895                 newdot(ap);
 896                 lmode = SLIST;
 897                 break;
 898
 899         case S_ORG:
 900                 if (dot.s_area->a_flag & A_ABS) {
 901                         outall();
 902                         laddr = dot.s_addr = absexpr();
 903                 } else {
 904                         err('o');
 905                 }
 906                 outall();
 907                 lmode = ALIST;
 908                 break;
 909
 910         case S_RADIX:
 911                 if (more()) {
 912                         switch (getnb()) {
 913                         case 'b':
 914                         case 'B':
 915                                 radix = 2;
 916                                 break;
 917                         case '@':
 918                         case 'o':
 919                         case 'O':
 920                         case 'q':
 921                         case 'Q':
 922                                 radix = 8;
 923                                 break;
 924                         case 'd':
 925                         case 'D':
 926                                 radix = 10;
 927                                 break;
 928                         case 'h':
 929                         case 'H':
 930                         case 'x':
 931                         case 'X':
 932                                 radix = 16;
 933                                 break;
 934                         default:
 935                                 radix = 10;
 936                                 qerr();
 937                                 break;
 938                         }
 939                 } else {
 940                         radix = 10;
 941                 }
 942                 lmode = SLIST;
 943                 break;
 944
 945         case S_INCL:
 946                 d = getnb();
 947                 p = fn;
 948                 while ((c = get()) != d) {
 949                         if (p < &fn[FILSPC-1]) {
 950                                 *p++ = c;
 951                         } else {
 952                                 break;
 953                         }
 954                 }
 955                 *p = 0;
 956                 if (++incfil == MAXINC ||
 957                    (ifp[incfil] = fopen(fn, "r")) == NULL) {
 958                         --incfil;
 959                         err('i');
 960                 } else {
 961                         lop = NLPP;
 962                         incline[incfil] = 0;
 963                         strcpy(incfn[incfil],fn);
 964                 }
 965                 lmode = SLIST;
 966                 break;
 967
 968         /*
 969          * If not an assembler directive then go to
 970          * the machine dependent function which handles
 971          * all the assembler mnemonics.
 972          */
 973         default:
 974                 machine(mp);
 975         }
 976         goto loop;
 977 }
 978
 979 /*)Function     FILE *  afile(fn, ft, wf)
 980  *
 981  *              char *  fn              file specification string
 982  *              char *  ft              file type string
 983  *              int     wf              read(0)/write(1) flag
 984  *
 985  *      The function afile() opens a file for reading or writing.
 986  *              (1)     If the file type specification string ft
 987  *                      is not NULL then a file specification is
 988  *                      constructed with the file path\name in fn
 989  *                      and the extension in ft.
 990  *              (2)     If the file type specification string ft
 991  *                      is NULL then the file specification is
 992  *                      constructed from fn.  If fn does not have
 993  *                      a file type then the default source file
 994  *                      type dsft is appended to the file specification.
 995  *
 996  *      afile() returns a file handle for the opened file or aborts
 997  *      the assembler on an open error.
 998  *
 999  *      local variables:
1000  *              int     c               character value
1001  *              FILE *  fp              filehandle for opened file
1002  *              char *  p1              pointer to filespec string fn
1003  *              char *  p2              pointer to filespec string fb
1004  *              char *  p3              pointer to filetype string ft
1005  *
1006  *      global variables:
1007  *              char    afn[]           afile() constructed filespec
1008  *              char    dsft[]          default assembler file type string
1009  *              char    afn[]           constructed file specification string
1010  *
1011  *      functions called:
1012  *              VOID    asexit()        asmain.c
1013  *              FILE *  fopen()         c_library
1014  *              int     fprintf()       c_library
1015  *
1016  *      side effects:
1017  *              File is opened for read or write.
1018  */
1019
1020 FILE *
1021 afile(fn, ft, wf)
1022 char *fn;
1023 char *ft;
1024 int wf;
1025 {
1026         register char *p1, *p2, *p3;
1027         register int c;
1028         FILE *fp;
1029
1030         p1 = fn;
1031         p2 = afn;
1032         p3 = ft;
1033         while ((c = *p1++) != 0 && c != FSEPX) {
1034                 if (p2 < &afn[FILSPC-4])
1035                         *p2++ = c;
1036         }
1037         *p2++ = FSEPX;
1038         if (*p3 == 0) {
1039                 if (c == FSEPX) {
1040                         p3 = p1;
1041                 } else {
1042                         p3 = dsft;
1043                 }
1044         }
1045         while ((c = *p3++) != 0) {
1046                 if (p2 < &afn[FILSPC-1])
1047                         *p2++ = c;
1048         }
1049         *p2++ = 0;
1050         if ((fp = fopen(afn, wf?"w":"r")) == NULL) {
1051                 fprintf(stderr, "%s: cannot %s.\n", afn, wf?"create":"open");
1052                 asexit(1);
1053         }
1054         return (fp);
1055 }
1056
1057 /*)Function     VOID    newdot(nap)
1058  *
1059  *              area *  nap             pointer to the new area structure
1060  *
1061  *      The function newdot():
1062  *              (1)     copies the current values of fuzz and the last
1063  *                      address into the current area referenced by dot
1064  *              (2)     loads dot with the pointer to the new area and
1065  *                      loads the fuzz and last address parameters
1066  *              (3)     outall() is called to flush any remaining
1067  *                      bufferred code from the old area to the output
1068  *
1069  *      local variables:
1070  *              area *  oap             pointer to old area
1071  *
1072  *      global variables:
1073  *              sym     dot             defined as sym[0]
1074  *              Addr_T  fuzz            tracks pass to pass changes in the
1075  *                                      address of symbols caused by
1076  *                                      variable length instruction formats
1077  *
1078  *      functions called:
1079  *              none
1080  *
1081  *      side effects:
1082  *              Current area saved, new area loaded, buffers flushed.
1083  */
1084
1085 VOID
1086 newdot(nap)
1087 register struct area *nap;
1088 {
1089         register struct area *oap;
1090
1091         oap = dot.s_area;
1092         oap->a_fuzz = fuzz;
1093         oap->a_size = dot.s_addr;
1094         fuzz = nap->a_fuzz;
1095         dot.s_area = nap;
1096         dot.s_addr = nap->a_size;
1097         outall();
1098 }
1099
1100 /*)Function     VOID    phase(ap, a)
1101  *
1102  *              area *  ap              pointer to area
1103  *              Addr_T  a               address in area
1104  *
1105  *      Function phase() compares the area ap and address a
1106  *      with the current area dot.s_area and address dot.s_addr
1107  *      to determine if the position of the symbol has changed
1108  *      between assembler passes.
1109  *
1110  *      local variables:
1111  *              none
1112  *
1113  *      global varaibles:
1114  *              sym *   dot             defined as sym[0]
1115  *
1116  *      functions called:
1117  *              none
1118  *
1119  *      side effects:
1120  *              The p error is invoked if the area and/or address
1121  *              has changed.
1122  */
1123
1124 VOID
1125 phase(ap, a)
1126 struct area *ap;
1127 Addr_T a;
1128 {
1129         if (ap != dot.s_area || a != dot.s_addr)
1130                 err('p');
1131 }
1132
1133 char *usetxt[] = {
1134 #ifdef SDK
1135         "Usage: [-dqxgalopsf] outfile file1 [file2 file3 ...]",
1136 #else /* SDK */
1137         "Usage: [-dqxgalopsf] file1 [file2 file3 ...]",
1138 #endif /* SDK */
1139         "  d    decimal listing",
1140         "  q    octal   listing",
1141         "  x    hex     listing (default)",
1142         "  g    undefined symbols made global",
1143         "  a    all user symbols made global",
1144 #ifdef SDK
1145         "  l    create list   output outfile[LST]",
1146         "  o    create object output outfile[o]",
1147         "  s    create symbol output outfile[SYM]",
1148 #else /* SDK */
1149         "  l    create list   output file1[LST]",
1150         "  o    create object output file1[REL]",
1151         "  s    create symbol output file1[SYM]",
1152 #endif /* SDK */
1153         "  p    disable listing pagination",
1154         "  f    flag relocatable references by  `   in listing file",
1155         " ff    flag relocatable references by mode in listing file",
1156         "",
1157         0
1158 };
1159
1160 /*)Function     VOID    usage()
1161  *
1162  *      The function usage() outputs to the stderr device the
1163  *      assembler name and version and a list of valid assembler options.
1164  *
1165  *      local variables:
1166  *              char ** dp              pointer to an array of
1167  *                                      text string pointers.
1168  *
1169  *      global variables:
1170  *              char    cpu[]           assembler type string
1171  *              char *  usetxt[]        array of string pointers
1172  *
1173  *      functions called:
1174  *              VOID    asexit()        asmain.c
1175  *              int     fprintf()       c_library
1176  *
1177  *      side effects:
1178  *              program is terminated
1179  */
1180
1181 VOID
1182 usage()
1183 {
1184         register char   **dp;
1185
1186         fprintf(stderr, "\nASxxxx Assembler %s  (%s)\n\n", VERSION, cpu);
1187         for (dp = usetxt; *dp; dp++)
1188                 fprintf(stderr, "%s\n", *dp);
1189         asexit(1);
1190 }