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nasm.c

/* The Netwide Assembler main program module
 *
 * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
 * Julian Hall. All rights reserved. The software is
 * redistributable under the licence given in the file "Licence"
 * distributed in the NASM archive.
 */

#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "nasm.h"
#include "nasmlib.h"
#include "insns.h"
#include "preproc.h"
#include "parser.h"
#include "eval.h"
#include "assemble.h"
#include "labels.h"
#include "outform.h"
#include "listing.h"

struct forwrefinfo {                 /* info held on forward refs. */
    int lineno;
    int operand;
};

static int get_bits (char *value);
static unsigned long get_cpu (char *cpu_str);
static void parse_cmdline (int, char **);
static void assemble_file (char *);
static int getkw (char **directive, char **value);
static void register_output_formats(void);
static void report_error_gnu (int severity, const char *fmt, ...);
static void report_error_vc (int severity, const char *fmt, ...);
static void report_error_common (int severity, const char *fmt, va_list args);
static int is_suppressed_warning (int severity);
static void usage(void);
static efunc report_error;

static int using_debug_info, opt_verbose_info;
int      tasm_compatible_mode = FALSE;
int pass0;

static char inname[FILENAME_MAX];
static char outname[FILENAME_MAX];
static char listname[FILENAME_MAX];
static int globallineno;             /* for forward-reference tracking */
/* static int pass = 0; */
static struct ofmt *ofmt = NULL;

static FILE *error_file;             /* Where to write error messages */

static FILE *ofile = NULL;
int optimizing = -1;          /* number of optimization passes to take */
static int sb, cmd_sb = 16;                /* by default */
static unsigned long cmd_cpu = IF_PLEVEL; /* highest level by default */
static unsigned long cpu = IF_PLEVEL;           /* passed to insn_size & assemble.c */
int global_offset_changed;             /* referenced in labels.c */

static loc_t location;
int in_abs_seg;               /* Flag we are in ABSOLUTE seg */
long abs_seg;                 /* ABSOLUTE segment basis */
long abs_offset;        /* ABSOLUTE offset */

static struct RAA *offsets;

static struct SAA *forwrefs;         /* keep track of forward references */
static struct forwrefinfo *forwref;

static Preproc *preproc;
enum op_type {
  op_normal,                  /* Preprocess and assemble */
  op_preprocess,        /* Preprocess only */
  op_depend             /* Generate dependencies */
};
static enum op_type operating_mode;

/*
 * Which of the suppressible warnings are suppressed. Entry zero
 * doesn't do anything. Initial defaults are given here.
 */
static char suppressed[1+ERR_WARN_MAX] = {
  0, TRUE, TRUE, TRUE, FALSE, TRUE
};

/*
 * The option names for the suppressible warnings. As before, entry
 * zero does nothing.
 */
static const char *suppressed_names[1+ERR_WARN_MAX] = {
    NULL, "macro-params", "macro-selfref", "orphan-labels", "number-overflow",
    "gnu-elf-extensions"
};

/*
 * The explanations for the suppressible warnings. As before, entry
 * zero does nothing.
 */
static const char *suppressed_what[1+ERR_WARN_MAX] = {
    NULL,
    "macro calls with wrong no. of params",
    "cyclic macro self-references",
    "labels alone on lines without trailing `:'",
    "numeric constants greater than 0xFFFFFFFF",
    "using 8- or 16-bit relocation in ELF, a GNU extension"
};

/*
 * This is a null preprocessor which just copies lines from input
 * to output. It's used when someone explicitly requests that NASM
 * not preprocess their source file.
 */

static void no_pp_reset (char *, int, efunc, evalfunc, ListGen *);
static char *no_pp_getline (void);
static void no_pp_cleanup (int);
static Preproc no_pp = {
    no_pp_reset,
    no_pp_getline,
    no_pp_cleanup
};

/*
 * get/set current offset...
 */
#define GET_CURR_OFFS (in_abs_seg?abs_offset:\
                  raa_read(offsets,location.segment))
#define SET_CURR_OFFS(x) (in_abs_seg?(void)(abs_offset=(x)):\
                   (void)(offsets=raa_write(offsets,location.segment,(x))))

static int want_usage;
static int terminate_after_phase;
int user_nolist = 0;             /* fbk 9/2/00 */

static void nasm_fputs(const char *line, FILE *outfile)
{
    if (outfile) {
      fputs(line, outfile);
      fputc('\n', outfile);
    } else
      puts(line);
}

int main(int argc, char **argv)
{
    pass0 = 1;
    want_usage = terminate_after_phase = FALSE;
    report_error = report_error_gnu;

    nasm_set_malloc_error (report_error);
    offsets = raa_init();
    forwrefs = saa_init ((long)sizeof(struct forwrefinfo));

    preproc = &nasmpp;
    operating_mode = op_normal;

    error_file = stderr;

    seg_init();

    register_output_formats();

    parse_cmdline(argc, argv);

    if (terminate_after_phase)
    {
      if (want_usage)
          usage();
      return 1;
    }

    /* If debugging info is disabled, suppress any debug calls */
    if (!using_debug_info)
        ofmt->current_dfmt = &null_debug_form;

    if (ofmt->stdmac)
      pp_extra_stdmac (ofmt->stdmac);
    parser_global_info (ofmt, &location);
    eval_global_info (ofmt, lookup_label, &location);

    /* define some macros dependent of command-line */
    {
      char temp [64];
      sprintf (temp, "__OUTPUT_FORMAT__=%s\n", ofmt->shortname);
      pp_pre_define (temp);
    }

    switch ( operating_mode ) {
    case op_depend:
      {
      char *line;
      preproc->reset (inname, 0, report_error, evaluate, &nasmlist);
      if (outname[0] == '\0')
        ofmt->filename (inname, outname, report_error);
      ofile = NULL;
      fprintf(stdout, "%s: %s", outname, inname);
      while ( (line = preproc->getline()) )
        nasm_free (line);
      preproc->cleanup(0);
      putc('\n', stdout);
      }
    break;

    case op_preprocess:
    {
      char *line;
      char *file_name = NULL;
      long  prior_linnum=0;
      int   lineinc=0;

      if (*outname) {
      ofile = fopen(outname, "w");
      if (!ofile)
        report_error (ERR_FATAL | ERR_NOFILE,
                  "unable to open output file `%s'", outname);
      } else
      ofile = NULL;

      location.known = FALSE;

/*      pass = 1; */
      preproc->reset (inname, 2, report_error, evaluate, &nasmlist);
      while ( (line = preproc->getline()) ) {
      /*
       * We generate %line directives if needed for later programs
       */
      long linnum = prior_linnum += lineinc;
      int  altline = src_get(&linnum, &file_name);
      if (altline) {
        if (altline==1 && lineinc==1)
          nasm_fputs("", ofile);
        else {
          lineinc = (altline != -1 || lineinc!=1);
          fprintf(ofile ? ofile : stdout, "%%line %ld+%d %s\n",
                linnum, lineinc, file_name);
        }
        prior_linnum = linnum;
      }
      nasm_fputs(line, ofile);
      nasm_free (line);
      }
      nasm_free(file_name);
      preproc->cleanup(0);
      if (ofile)
      fclose(ofile);
      if (ofile && terminate_after_phase)
      remove(outname);
    }
    break;

    case op_normal:
      {
      /*
       * We must call ofmt->filename _anyway_, even if the user
       * has specified their own output file, because some
       * formats (eg OBJ and COFF) use ofmt->filename to find out
       * the name of the input file and then put that inside the
       * file.
       */
      ofmt->filename (inname, outname, report_error);
      
      ofile = fopen(outname, "wb");
      if (!ofile) {
        report_error (ERR_FATAL | ERR_NOFILE,
                  "unable to open output file `%s'", outname);
      }
      
      /*
       * We must call init_labels() before ofmt->init() since
       * some object formats will want to define labels in their
       * init routines. (eg OS/2 defines the FLAT group)
       */
      init_labels ();
      
      ofmt->init (ofile, report_error, define_label, evaluate);
      
      assemble_file (inname);
      
        if (!terminate_after_phase) {
        ofmt->cleanup (using_debug_info);
        cleanup_labels ();
          } else {
        /*
         * We had an fclose on the output file here, but we
         * actually do that in all the object file drivers as well,
         * so we're leaving out the one here.
         *     fclose (ofile);
         */
        remove(outname);
          if (listname[0])
             remove(listname);
      }
      }
    break;
    }

    if (want_usage)
      usage();

    raa_free (offsets);
    saa_free (forwrefs);
    eval_cleanup ();
    nasmlib_cleanup ();

    if (terminate_after_phase)
      return 1;
    else
      return 0;
}


/*
 * Get a parameter for a command line option.
 * First arg must be in the form of e.g. -f...
 */
static char *get_param (char *p, char *q, int *advance)
{
    *advance = 0;
    if (p[2])                  /* the parameter's in the option */
    {
      p += 2;
      while (isspace(*p))
          p++;
      return p;
    }
    if (q && q[0])
    {
      *advance = 1;
      return q;
    }
    report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
              "option `-%c' requires an argument",
              p[1]);
    return NULL;
}

struct textargs
{
      const char *label;
      int value;
};

#define OPT_PREFIX 0
#define OPT_POSTFIX 1
struct textargs textopts[] =
{
      {"prefix",OPT_PREFIX},
      {"postfix",OPT_POSTFIX},
      {NULL,0}
};


int stopoptions = 0;
static int process_arg (char *p, char *q)
{
    char *param;
    int  i, advance = 0;

    if (!p || !p[0])
      return 0;

    if (p[0]=='-' && ! stopoptions)
    {
      switch (p[1]) {
        case 's':
            error_file = stdout;
            break;
        case 'o':              /* these parameters take values */
        case 'O':
        case 'f':
        case 'p':
          case 'P':
        case 'd':
        case 'D':
        case 'i':
          case 'I':
        case 'l':
        case 'E':
        case 'F':
        case 'X':
        case 'u':
        case 'U':
          if ( !(param = get_param (p, q, &advance)) )
            break;
          if (p[1]=='o') {           /* output file */
            strcpy (outname, param);
          } else if (p[1]=='f') {    /* output format */
            ofmt = ofmt_find(param);
            if (!ofmt) {
                report_error (ERR_FATAL | ERR_NOFILE | ERR_USAGE,
                          "unrecognised output format `%s' - "
                          "use -hf for a list",
                          param);
            }
            else
                ofmt->current_dfmt = ofmt->debug_formats[0];
          } else if (p[1]=='O') {             /* Optimization level */
            int opt;
            opt = -99;
            while (*param) {
                if (isdigit(*param)) {
                  opt = atoi(param);
                  while(isdigit(*++param)) ;
                  if (opt<=0) optimizing = -1;        /* 0.98 behaviour */
                  else if (opt==1) optimizing = 0;    /* Two passes, 0.98.09 behavior */
                  else optimizing = opt;              /* Multiple passes */
                } else {
                  if (*param == 'v' || *param == '+') {
                      ++param;
                      opt_verbose_info = TRUE;
                      opt = 0;
                  } else {    /* garbage */
                      opt = -99;
                      break;
                  }
                }
            } /* while (*param) */
            if (opt == -99) report_error(ERR_FATAL,
                  "command line optimization level must be 'v', 0..3 or <nn>");
          } else if (p[1]=='P' || p[1]=='p') {    /* pre-include */
            pp_pre_include (param);
          } else if (p[1]=='D' || p[1]=='d') {    /* pre-define */
            pp_pre_define (param);
          } else if (p[1]=='U' || p[1]=='u') {    /* un-define */
            pp_pre_undefine (param);
          } else if (p[1]=='I' || p[1]=='i') {    /* include search path */
            pp_include_path (param);
          } else if (p[1]=='l') {    /* listing file */
            strcpy (listname, param);
          } else if (p[1]=='E') {    /* error messages file */
            error_file = fopen(param, "w");
            if ( !error_file ) {
              error_file = stderr; /* Revert to default! */
              report_error (ERR_FATAL | ERR_NOFILE | ERR_USAGE,
                        "cannot open file `%s' for error messages",
                        param);
            }
          } else if (p[1] == 'F') {  /* specify debug format */
              ofmt->current_dfmt = dfmt_find(ofmt, param);
              if (!ofmt->current_dfmt) {
                  report_error (ERR_FATAL | ERR_NOFILE | ERR_USAGE,
                          "unrecognized debug format `%s' for"
                          " output format `%s'",
                          param, ofmt->shortname);
                }
            } else if (p[1] == 'X') { /* specify error reporting format */
            if (nasm_stricmp("vc", param) == 0)
                report_error = report_error_vc;
            else if (nasm_stricmp("gnu", param) == 0)
                report_error = report_error_gnu;
            else
                report_error (ERR_FATAL | ERR_NOFILE | ERR_USAGE,
                          "unrecognized error reporting format `%s'",
                          param);
          }
          break;
        case 'g':
          using_debug_info = TRUE;
          break;
        case 'h':
          printf("usage: nasm [-@ response file] [-o outfile] [-f format] "
               "[-l listfile]\n"
               "            [options...] [--] filename\n"
               "    or nasm -r   for version info (obsolete)\n"
               "    or nasm -v   for version info (preferred)\n\n"
               "    -t          Assemble in SciTech TASM compatible mode\n"
               "    -g          Generate debug information in selected format.\n");
          printf("    -e          preprocess only (writes output to stdout by default)\n"
               "    -a          don't preprocess (assemble only)\n"
               "    -M          generate Makefile dependencies on stdout\n\n"
               "    -E<file>    redirect error messages to file\n"
               "    -s          redirect error messages to stdout\n\n"
               "    -F format   select a debugging format\n\n"
               "    -I<path>    adds a pathname to the include file path\n");
          printf("    -O<digit>   optimize branch offsets (-O0 disables, default)\n"
               "    -P<file>    pre-includes a file\n"
               "    -D<macro>[=<value>] pre-defines a macro\n"
               "    -U<macro>   undefines a macro\n"
               "    -X<format>  specifies error reporting format (gnu or vc)\n"
               "    -w+foo      enables warnings about foo; -w-foo disables them\n"
               "where foo can be:\n");
          for (i=1; i<=ERR_WARN_MAX; i++)
            printf("    %-23s %s (default %s)\n",
                   suppressed_names[i], suppressed_what[i],
                   suppressed[i] ? "off" : "on");
          printf ("\nresponse files should contain command line parameters"
                ", one per line.\n");
          if (p[2] == 'f') {
            printf("\nvalid output formats for -f are"
                   " (`*' denotes default):\n");
            ofmt_list(ofmt, stdout);
          }
          else {
            printf ("\nFor a list of valid output formats, use -hf.\n");
            printf ("For a list of debug formats, use -f <form> -y.\n");
          }
          exit (0);                  /* never need usage message here */
          break;
          case 'y':
          printf("\nvalid debug formats for '%s' output format are"
               " ('*' denotes default):\n",
            ofmt->shortname);
          dfmt_list(ofmt, stdout);
          exit(0);
          break;
        case 't':
          tasm_compatible_mode = TRUE;
          break;
        case 'r':
        case 'v':
        {
            const char *nasm_version_string =
              "NASM version " NASM_VER " compiled on " __DATE__
#ifdef DEBUG
              " with -DDEBUG"
#endif
              ;
            puts(nasm_version_string);
            exit (0);                /* never need usage message here */
        }
        break;
        case 'e':              /* preprocess only */
          operating_mode = op_preprocess;
          break;
        case 'a':              /* assemble only - don't preprocess */
          preproc = &no_pp;
          break;
        case 'w':
          if (p[2] != '+' && p[2] != '-') {
            report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
                        "invalid option to `-w'");
          } else {
                for (i=1; i<=ERR_WARN_MAX; i++)
                if (!nasm_stricmp(p+3, suppressed_names[i]))
                  break;
            if (i <= ERR_WARN_MAX)
                suppressed[i] = (p[2] == '-');
            else
                report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
                          "invalid option to `-w'");
          }
          break;
          case 'M':
          operating_mode = op_depend;
          break;

        case '-':
        {
            int s;
            
            if (p[2]==0) {          /* -- => stop processing options */
                stopoptions = 1;
                break;
            }
            for(s=0; textopts[s].label; s++)
            {
                  if(!nasm_stricmp(p+2, textopts[s].label))
                  {
                        break;
                  }
            }

            switch(s)
            {
            
                  case OPT_PREFIX:
                  case OPT_POSTFIX:
                  {
                        if (!q)
                        {
                              report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
                                          "option `--%s' requires an argument",
                                          p+2);
                              break;
                        }
                        else
                        {
                              advance = 1, param = q;
                        }
                        
                        if(s == OPT_PREFIX)
                        {
                              strncpy(lprefix,param,PREFIX_MAX-1);
                              lprefix[PREFIX_MAX-1]=0;
                              break;
                        }
                        if(s == OPT_POSTFIX)
                        {
                              strncpy(lpostfix,param,POSTFIX_MAX-1);
                              lpostfix[POSTFIX_MAX-1]=0;
                              break;
                        }
                        break;
                  }
                  default:
                  {
                        report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
                              "unrecognised option `--%s'",
                              p+2);
                        break;
                  }
            }
            break;
        }

        default:
          if (!ofmt->setinfo(GI_SWITCH,&p))
            report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
                    "unrecognised option `-%c'",
                    p[1]);
          break;
      }
    }
    else
    {
      if (*inname) {
          report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
                    "more than one input file specified");
      } else
          strcpy(inname, p);
    }

    return advance;
}

#define ARG_BUF_DELTA 128

static void process_respfile (FILE *rfile)
{
    char *buffer, *p, *q, *prevarg;
    int bufsize, prevargsize;

    bufsize = prevargsize = ARG_BUF_DELTA;
    buffer = nasm_malloc(ARG_BUF_DELTA);
    prevarg = nasm_malloc(ARG_BUF_DELTA);
    prevarg[0] = '\0';

    while (1) {   /* Loop to handle all lines in file */

      p = buffer;
      while (1) {  /* Loop to handle long lines */
          q = fgets(p, bufsize-(p-buffer), rfile);
          if (!q)
            break;
          p += strlen(p);
          if (p > buffer && p[-1] == '\n')
            break;
          if (p-buffer > bufsize-10) {
            int offset;
            offset = p - buffer;
            bufsize += ARG_BUF_DELTA;
            buffer = nasm_realloc(buffer, bufsize);
            p = buffer + offset;
          }
      }

      if (!q && p == buffer) {
          if (prevarg[0])
            process_arg (prevarg, NULL);
          nasm_free (buffer);
          nasm_free (prevarg);
          return;
      }

      /*
       * Play safe: remove CRs, LFs and any spurious ^Zs, if any of
       * them are present at the end of the line.
       */
      *(p = &buffer[strcspn(buffer, "\r\n\032")]) = '\0';

      while (p > buffer && isspace(p[-1]))
          *--p = '\0';

      p = buffer;
      while (isspace(*p))
          p++;

      if (process_arg (prevarg, p))
          *p = '\0';

      if (strlen(p) > prevargsize-10) {
          prevargsize += ARG_BUF_DELTA;
          prevarg = nasm_realloc(prevarg, prevargsize);
      }
      strcpy (prevarg, p);
    }
}

/* Function to process args from a string of args, rather than the
 * argv array. Used by the environment variable and response file
 * processing.
 */
static void process_args (char *args) {
    char *p, *q, *arg, *prevarg;
    char separator = ' ';

    p = args;
    if (*p && *p != '-')
      separator = *p++;
    arg = NULL;
    while (*p) {
      q = p;
      while (*p && *p != separator) p++;
      while (*p == separator) *p++ = '\0';
      prevarg = arg;
      arg = q;
      if (process_arg (prevarg, arg))
          arg = NULL;
    }
    if (arg)
      process_arg (arg, NULL);
}

static void parse_cmdline(int argc, char **argv)
{
    FILE *rfile;
    char *envreal, *envcopy=NULL, *p, *arg;

    *inname = *outname = *listname = '\0';

    /*
     * First, process the NASMENV environment variable.
     */
    envreal = getenv("NASMENV");
    arg = NULL;
    if (envreal) {
      envcopy = nasm_strdup(envreal);
      process_args(envcopy);
      nasm_free (envcopy);
    }

    /*
     * Now process the actual command line.
     */
    while (--argc)
    {
      int i;
      argv++;
      if (argv[0][0] == '@') {
          /* We have a response file, so process this as a set of
           * arguments like the environment variable. This allows us
           * to have multiple arguments on a single line, which is
           * different to the -@resp file processing below for regular
           * NASM.
           */
          char *str = malloc(2048);
          FILE *f = fopen(&argv[0][1],"r");
          if (!str) {
            printf("out of memory");
            exit(-1);
            }
          if (f) {
            while (fgets(str,2048,f)) {
                process_args(str);
            }
            fclose(f);
          }
          free(str);
          argc--;
          argv++;
      }
      if (!stopoptions && argv[0][0] == '-' && argv[0][1] == '@') {
          if ((p = get_param (argv[0], argc > 1 ? argv[1] : NULL, &i))) {
            if ((rfile = fopen(p, "r"))) {
                process_respfile (rfile);
                fclose(rfile);
            } else
                report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
                      "unable to open response file `%s'", p);
          }
      } else
          i = process_arg (argv[0], argc > 1 ? argv[1] : NULL);
      argv += i, argc -= i;
    }

    if (!*inname)
      report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
                  "no input file specified");
}


static void assemble_file (char *fname)
{
    char   * directive, * value, * p, * q, * special, * line, debugid[80];
    insn   output_ins;
    int    i, rn_error, validid;
    long   seg, offs;
    struct tokenval tokval;
    expr   * e;
    int pass, pass_max;
    int pass_cnt = 0;         /* count actual passes */

    if (cmd_sb == 32 && cmd_cpu < IF_386)
      report_error(ERR_FATAL, "command line: "
                    "32-bit segment size requires a higher cpu");

   pass_max = (optimizing>0 ? optimizing : 0) + 2;    /* passes 1, optimizing, then 2 */
   pass0 = !(optimizing>0);         /* start at 1 if not optimizing */
   for (pass = 1; pass <= pass_max  &&  pass0 <= 2; pass++) {
      int pass1, pass2;
      ldfunc def_label;

      pass1 = pass < pass_max ? 1 : 2;  /* seq is 1, 1, 1,..., 1, 2 */
      pass2 = pass > 1 ? 2 : 1;         /* seq is 1, 2, 2,..., 2, 2 */
  /*      pass0                            seq is 0, 0, 0,..., 1, 2 */

      def_label = pass > 1 ? redefine_label : define_label;


      sb = cmd_sb;        /* set 'bits' to command line default */
      cpu = cmd_cpu;
      if (pass0 == 2) {
         if (*listname)
            nasmlist.init(listname, report_error);
      }
      in_abs_seg = FALSE;
      global_offset_changed = FALSE;      /* set by redefine_label */
      location.segment = ofmt->section(NULL, pass2, &sb);
      if (pass > 1) {
         saa_rewind (forwrefs);
         forwref = saa_rstruct (forwrefs);
         raa_free (offsets);
         offsets = raa_init();
      }
      preproc->reset(fname, pass1, report_error, evaluate, &nasmlist);
      globallineno = 0;
      if (pass == 1) location.known = TRUE;
      location.offset = offs = GET_CURR_OFFS;

      while ( (line = preproc->getline()) )
      {
         globallineno++;

         /* here we parse our directives; this is not handled by the 'real'
            * parser. */
         directive = line;
         if ( (i = getkw (&directive, &value)) )
         {
               switch (i) {
               case 1:               /* [SEGMENT n] */
                  seg = ofmt->section (value, pass2, &sb);
                  if (seg == NO_SEG) {
                     report_error (pass1==1 ? ERR_NONFATAL : ERR_PANIC,
                                    "segment name `%s' not recognised",
                                    value);
                  } else {
                     in_abs_seg = FALSE;
                     location.segment = seg;
                  }
                  break;
               case 2:               /* [EXTERN label:special] */
                  if (*value == '$') value++;   /* skip initial $ if present */
                  if (pass0 == 2) {
                        q = value;
                        while (*q && *q != ':')
                           q++;
                        if (*q == ':') {
                           *q++ = '\0';
                           ofmt->symdef(value, 0L, 0L, 3, q);
                        }
                  } else if (pass == 1) {   /* pass == 1 */
                        q = value;
                        validid = TRUE;
                        if (!isidstart(*q))
                           validid = FALSE;
                        while (*q && *q != ':') {
                           if (!isidchar(*q))
                                 validid = FALSE;
                           q++;
                        }
                        if (!validid) {
                           report_error (ERR_NONFATAL,
                                          "identifier expected after EXTERN");
                           break;
                        }
                        if (*q == ':') {
                           *q++ = '\0';
                           special = q;
                        } else
                           special = NULL;
                        if (!is_extern(value)) {   /* allow re-EXTERN to be ignored */
                           int temp = pass0;
                           pass0 = 1;     /* fake pass 1 in labels.c */
                           declare_as_global (value, special, report_error);
                           define_label (value, seg_alloc(), 0L, NULL, FALSE, TRUE,
                                          ofmt, report_error);
                           pass0 = temp;
                        }
                  } /* else  pass0 == 1 */
                  break;
               case 3:               /* [BITS bits] */
                  sb = get_bits(value);
                  break;
               case 4:               /* [GLOBAL symbol:special] */
                  if (*value == '$') value++;   /* skip initial $ if present */
                  if (pass0 == 2) { /* pass 2 */
                        q = value;
                        while (*q && *q != ':')
                           q++;
                        if (*q == ':') {
                           *q++ = '\0';
                           ofmt->symdef(value, 0L, 0L, 3, q);
                        }
                  } else if (pass2 == 1) { /* pass == 1 */
                        q = value;
                        validid = TRUE;
                        if (!isidstart(*q))
                           validid = FALSE;
                        while (*q && *q != ':') {
                           if (!isidchar(*q))
                                 validid = FALSE;
                           q++;
                        }
                        if (!validid) {
                           report_error (ERR_NONFATAL,
                                          "identifier expected after GLOBAL");
                           break;
                        }
                        if (*q == ':') {
                           *q++ = '\0';
                           special = q;
                        } else
                           special = NULL;
                        declare_as_global (value, special, report_error);
                  } /* pass == 1 */
                  break;
               case 5:               /* [COMMON symbol size:special] */
                  if (*value == '$') value++;   /* skip initial $ if present */
                  if (pass0 == 1) {
                        p = value;
                        validid = TRUE;
                        if (!isidstart(*p))
                           validid = FALSE;
                        while (*p && !isspace(*p)) {
                           if (!isidchar(*p))
                                 validid = FALSE;
                           p++;
                        }
                        if (!validid) {
                           report_error (ERR_NONFATAL,
                                          "identifier expected after COMMON");
                           break;
                        }
                        if (*p) {
                           long size;

                           while (*p && isspace(*p))
                                 *p++ = '\0';
                           q = p;
                           while (*q && *q != ':')
                                 q++;
                           if (*q == ':') {
                                 *q++ = '\0';
                                 special = q;
                           } else
                                 special = NULL;
                           size = readnum (p, &rn_error);
                           if (rn_error)
                                 report_error (ERR_NONFATAL, "invalid size specified"
                                             " in COMMON declaration");
                           else
                                 define_common (value, seg_alloc(), size,
                                                special, ofmt, report_error);
                        } else
                           report_error (ERR_NONFATAL, "no size specified in"
                                          " COMMON declaration");
                  } else if (pass0 == 2) { /* pass == 2 */
                        q = value;
                        while (*q && *q != ':') {
                           if (isspace(*q))
                                 *q = '\0';
                           q++;
                        }
                        if (*q == ':') {
                           *q++ = '\0';
                           ofmt->symdef(value, 0L, 0L, 3, q);
                        }
                  }
                  break;
               case 6:                       /* [ABSOLUTE address] */
                  stdscan_reset();
                  stdscan_bufptr = value;
                  tokval.t_type = TOKEN_INVALID;
                  e = evaluate(stdscan, NULL, &tokval, NULL, pass2, report_error,
                              NULL);
                  if (e) {
                     if (!is_reloc(e))
                           report_error (pass0==1 ? ERR_NONFATAL : ERR_PANIC,
                                 "cannot use non-relocatable expression as "
                                 "ABSOLUTE address");
                     else {
                   abs_seg = reloc_seg(e);
                   abs_offset = reloc_value(e);
                     }
                  } else
                     if (pass==1) abs_offset = 0x100;/* don't go near zero in case of / */
                     else report_error (ERR_PANIC, "invalid ABSOLUTE address "
                                    "in pass two");
                  in_abs_seg = TRUE;
                  location.segment = NO_SEG;
                  break;
               case 7:    /* DEBUG       */
                  p = value;
                  q = debugid;
                  validid = TRUE;
                  if (!isidstart(*p))
                     validid = FALSE;
                  while (*p && !isspace(*p)) {
                     if (!isidchar(*p))
                           validid = FALSE;
                     *q++ = *p++;
                  }
                  *q++ = 0;
                  if (!validid) {
                     report_error (pass==1 ? ERR_NONFATAL : ERR_PANIC,
                                    "identifier expected after DEBUG");
                     break;
                  }
                  while (*p && isspace(*p)) p++;
                  if (pass==pass_max) ofmt->current_dfmt->debug_directive (debugid, p);
                  break;
               case 8:              /* [WARNING {+|-}warn-name] */
                  if (pass1 == 1) {
                 while (*value && isspace(*value))
                    value++;

                     if (*value == '+' || *value == '-') {
                    validid = (*value == '-') ? TRUE : FALSE;
                    value++;
                 } else
                    validid = FALSE;

                 for (i=1; i<=ERR_WARN_MAX; i++)
                    if (!nasm_stricmp(value, suppressed_names[i]))
                      break;
                 if (i <= ERR_WARN_MAX)
                    suppressed[i] = validid;
                 else
                    report_error (ERR_NONFATAL, "invalid warning id in WARNING directive");
                }
              break;
               case 9:  /* cpu */
                  cpu = get_cpu (value);
                  break;
               case 10:        /* fbk 9/2/00 */       /* [LIST {+|-}] */
                   while (*value && isspace(*value))
                       value++;

                   if (*value == '+') {
                       user_nolist = 0;
                 }
                     else {
                          if (*value == '-') {
                          user_nolist = 1;
                          }
                          else {
                              report_error (ERR_NONFATAL, "invalid parameter to \"list\" directive");
                          }
                      }
                  break;
               default:
                  if (!ofmt->directive (directive, value, pass2))
                     report_error (pass1==1 ? ERR_NONFATAL : ERR_PANIC,
                              "unrecognised directive [%s]",
                              directive);
               }
         }
         else         /* it isn't a directive */
         {
               parse_line (pass1, line, &output_ins,
                           report_error, evaluate,
                           def_label);

               if (!(optimizing>0) && pass == 2) {
                  if (forwref != NULL && globallineno == forwref->lineno) {
                     output_ins.forw_ref = TRUE;
                     do {
                        output_ins.oprs[forwref->operand].opflags |= OPFLAG_FORWARD;
                        forwref = saa_rstruct (forwrefs);
                     } while (forwref != NULL && forwref->lineno == globallineno);
                  } else
                     output_ins.forw_ref = FALSE;
               }


               if (!(optimizing>0) && output_ins.forw_ref)
               {
                  if (pass == 1) {
                        for(i = 0; i < output_ins.operands; i++)
                        {
                           if (output_ins.oprs[i].opflags & OPFLAG_FORWARD)
                           {
                                    struct forwrefinfo *fwinf =
                                       (struct forwrefinfo *)saa_wstruct(forwrefs);
                                 fwinf->lineno = globallineno;
                                 fwinf->operand = i;
                           }
                        }
                  } else { /* pass == 2 */
                        /*
                        * Hack to prevent phase error in the code
                        *   rol ax,x
                        *   x equ 1
                        *
                        * If the second operand is a forward reference,
                        * the UNITY property of the number 1 in that
                        * operand is cancelled. Otherwise the above
                        * sequence will cause a phase error.
                        *
                        * This hack means that the above code will
                        * generate 286+ code.
                        *
                        * The forward reference will mean that the
                        * operand will not have the UNITY property on
                        * the first pass, so the pass behaviours will
                        * be consistent.
                        */

                        if (output_ins.operands >= 2 &&
                        (output_ins.oprs[1].opflags & OPFLAG_FORWARD))
                        {
                           output_ins.oprs[1].type &= ~(ONENESS|BYTENESS);
                        }

                  } /* pass == 2 */

               } /*  forw_ref */


               if (output_ins.opcode == I_EQU) {
                     if (pass1 == 1)
                     {
                        /*
                        * Special `..' EQUs get processed in pass two,
                        * except `..@' macro-processor EQUs which are done
                        * in the normal place.
                        */
                        if (!output_ins.label)
                           report_error (ERR_NONFATAL,
                                          "EQU not preceded by label");

                        else if (output_ins.label[0] != '.' ||
                                 output_ins.label[1] != '.' ||
                                 output_ins.label[2] == '@')
                        {
                           if (output_ins.operands == 1 &&
                                 (output_ins.oprs[0].type & IMMEDIATE) &&
                                 output_ins.oprs[0].wrt == NO_SEG)
                           {
                              int isext = output_ins.oprs[0].opflags & OPFLAG_EXTERN;
                              def_label (output_ins.label,
                               output_ins.oprs[0].segment,
                               output_ins.oprs[0].offset,
                               NULL, FALSE, isext, ofmt, report_error);
                           }
                           else if (output_ins.operands == 2 &&
                                       (output_ins.oprs[0].type & IMMEDIATE) &&
                                       (output_ins.oprs[0].type & COLON) &&
                                       output_ins.oprs[0].segment == NO_SEG &&
                                       output_ins.oprs[0].wrt == NO_SEG &&
                                       (output_ins.oprs[1].type & IMMEDIATE) &&
                                       output_ins.oprs[1].segment == NO_SEG &&
                                       output_ins.oprs[1].wrt == NO_SEG)
                           {
                                 def_label (output_ins.label,
                                             output_ins.oprs[0].offset | SEG_ABS,
                                             output_ins.oprs[1].offset,
                                             NULL, FALSE, FALSE, ofmt, report_error);
                           }
                           else
                                 report_error(ERR_NONFATAL, "bad syntax for EQU");
                        }
                     } else {  /* pass == 2 */
                        /*
                        * Special `..' EQUs get processed here, except
                        * `..@' macro processor EQUs which are done above.
                        */
                        if (output_ins.label[0] == '.' &&
                           output_ins.label[1] == '.' &&
                           output_ins.label[2] != '@')
                        {
                           if (output_ins.operands == 1 &&
                                 (output_ins.oprs[0].type & IMMEDIATE)) {
                                 define_label (output_ins.label,
                                             output_ins.oprs[0].segment,
                                             output_ins.oprs[0].offset,
                                             NULL, FALSE, FALSE, ofmt, report_error);
                           }
                           else if (output_ins.operands == 2 &&
                                       (output_ins.oprs[0].type & IMMEDIATE) &&
                                       (output_ins.oprs[0].type & COLON) &&
                                       output_ins.oprs[0].segment == NO_SEG &&
                                       (output_ins.oprs[1].type & IMMEDIATE) &&
                                       output_ins.oprs[1].segment == NO_SEG)
                           {
                                 define_label (output_ins.label,
                                             output_ins.oprs[0].offset | SEG_ABS,
                                             output_ins.oprs[1].offset,
                                             NULL, FALSE, FALSE, ofmt, report_error);
                           }
                           else
                                 report_error(ERR_NONFATAL, "bad syntax for EQU");
                        }
                     }  /* pass == 2 */
               } else { /* instruction isn't an EQU */

                     if (pass1 == 1) {

                        long l = insn_size (location.segment, offs, sb, cpu,
                                          &output_ins, report_error);

                        /* if (using_debug_info)  && output_ins.opcode != -1)*/
                        if (using_debug_info)  /* fbk 03/25/01 */

                        {
                           /* this is done here so we can do debug type info */
                           long typeinfo = TYS_ELEMENTS(output_ins.operands);
                           switch (output_ins.opcode) {
                                    case I_RESB:
                                        typeinfo = TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_BYTE;
                                        break;
                                    case I_RESW:
                                        typeinfo = TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_WORD;
                                        break;
                                    case I_RESD:
                                        typeinfo = TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_DWORD;
                                        break;
                                    case I_RESQ:
                                        typeinfo = TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_QWORD;
                                        break;
                                    case I_REST:
                                        typeinfo = TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_TBYTE;
                                        break;
                                    case I_DB:
                                        typeinfo |= TY_BYTE;
                                        break;
                                    case I_DW:
                                        typeinfo |= TY_WORD;
                                        break;
                                    case I_DD:
                                       if (output_ins.eops_float)
                                                typeinfo |= TY_FLOAT;
                                       else
                                                typeinfo |= TY_DWORD;
                                       break;
                                    case I_DQ:
                                       typeinfo |= TY_QWORD;
                                       break;
                                    case I_DT:
                                       typeinfo |= TY_TBYTE;
                                       break;
                                    default:
                                       typeinfo = TY_LABEL;

                           }

                           ofmt->current_dfmt->debug_typevalue(typeinfo);

                        }
                        if (l != -1) {
                           offs += l;
                           SET_CURR_OFFS (offs);
                        }
                        /*
                        * else l == -1 => invalid instruction, which will be
                        * flagged as an error on pass 2
                        */

                     } else { /* pass == 2 */
                        offs += assemble (location.segment, offs, sb, cpu,
                                       &output_ins, ofmt, report_error, &nasmlist);
                        SET_CURR_OFFS (offs);

                     }
               } /* not an EQU */
               cleanup_insn (&output_ins);
         }
         nasm_free (line);
         location.offset = offs = GET_CURR_OFFS;
      } /* end while (line = preproc->getline... */

      if (pass1==2 && global_offset_changed)
         report_error(ERR_NONFATAL, "phase error detected at end of assembly.");

      if (pass1 == 1) preproc->cleanup(1);

      if (pass1==1 && terminate_after_phase) {
         fclose(ofile);
         remove(outname);
         if (want_usage)
               usage();
         exit (1);
      }
      pass_cnt++;
      if (pass>1 && !global_offset_changed) {
       pass0++;
       if (pass0==2) pass = pass_max - 1;
      }     else if (!(optimizing>0)) pass0++;

   } /* for (pass=1; pass<=2; pass++) */

   preproc->cleanup(0);
   nasmlist.cleanup();
#if 1
   if (optimizing>0 && opt_verbose_info)  /*  -On and -Ov switches */
      fprintf(stdout,
                "info:: assembly required 1+%d+1 passes\n", pass_cnt-2);
#endif
} /* exit from assemble_file (...) */


static int getkw (char **directive, char **value)
{
    char *p, *q, *buf;
    
    buf = *directive;

    /*  allow leading spaces or tabs */
    while (*buf==' ' || *buf=='\t')
       buf++;

    if (*buf!='[')
      return 0;

    p = buf;

    while (*p && *p != ']') p++;

    if (!*p)
      return 0;

    q = p++;

    while (*p && *p != ';') {
      if (!isspace(*p))
          return 0;
      p++;
    }
    q[1] = '\0';

    *directive = p = buf+1;
    while (*buf && *buf!=' ' && *buf!=']' && *buf!='\t')
      buf++;
    if (*buf==']') {
      *buf = '\0';
      *value = buf;
    } else {
      *buf++ = '\0';
        while (isspace(*buf)) buf++;   /* beppu - skip leading whitespace */
      *value = buf;
      while (*buf!=']') buf++;
      *buf++ = '\0';
    }
#if 0
    for (q=p; *q; q++)
      *q = tolower(*q);
#endif      
    if (!nasm_stricmp(p, "segment") || !nasm_stricmp(p, "section"))
      return 1;
    if (!nasm_stricmp(p, "extern"))
      return 2;
    if (!nasm_stricmp(p, "bits"))
      return 3;
    if (!nasm_stricmp(p, "global"))
      return 4;
    if (!nasm_stricmp(p, "common"))
      return 5;
    if (!nasm_stricmp(p, "absolute"))
      return 6;
    if (!nasm_stricmp(p, "debug"))
      return 7;
    if (!nasm_stricmp(p, "warning"))
      return 8;
    if (!nasm_stricmp(p, "cpu"))
      return 9;
    if (!nasm_stricmp(p, "list"))    /* fbk 9/2/00 */
        return 10;
    return -1;
}

/**
 * gnu style error reporting
 * This function prints an error message to error_file in the
 * style used by GNU. An example would be:
 * file.asm:50: error: blah blah blah
 * where file.asm is the name of the file, 50 is the line number on 
 * which the error occurs (or is detected) and "error:" is one of
 * the possible optional diagnostics -- it can be "error" or "warning"
 * or something else.  Finally the line terminates with the actual 
 * error message.
 * 
 * @param severity the severity of the warning or error 
 * @param fmt the printf style format string
 */
static void report_error_gnu (int severity, const char *fmt, ...)
{
    va_list ap;

    if (is_suppressed_warning(severity))
      return;

    if (severity & ERR_NOFILE)
      fputs ("nasm: ", error_file);
    else {
      char * currentfile = NULL;
      long lineno = 0;
      src_get (&lineno, &currentfile);
      fprintf (error_file, "%s:%ld: ", currentfile, lineno);
      nasm_free (currentfile);
    }
    va_start (ap, fmt);
    report_error_common (severity, fmt, ap);
    va_end (ap);
}

/**
 * MS style error reporting
 * This function prints an error message to error_file in the
 * style used by Visual C and some other Microsoft tools. An example 
 * would be:
 * file.asm(50) : error: blah blah blah
 * where file.asm is the name of the file, 50 is the line number on 
 * which the error occurs (or is detected) and "error:" is one of
 * the possible optional diagnostics -- it can be "error" or "warning"
 * or something else.  Finally the line terminates with the actual 
 * error message.
 * 
 * @param severity the severity of the warning or error 
 * @param fmt the printf style format string
 */
static void report_error_vc (int severity, const char *fmt, ...)
{
    va_list ap;

    if (is_suppressed_warning (severity))
      return;

    if (severity & ERR_NOFILE)
      fputs ("nasm: ", error_file);
    else {
      char * currentfile = NULL;
      long lineno = 0;
      src_get (&lineno, &currentfile);
      fprintf (error_file, "%s(%ld) : ", currentfile, lineno);
      nasm_free (currentfile);
    }
    va_start (ap, fmt);
    report_error_common (severity, fmt, ap);
    va_end (ap);
}

/**
 * check for supressed warning
 * checks for suppressed warning or pass one only warning and we're 
 * not in pass 1
 *
 * @param severity the severity of the warning or error
 * @return true if we should abort error/warning printing
 */
static int is_suppressed_warning (int severity)
{
    /*
     * See if it's a suppressed warning.
     */
    return ((severity & ERR_MASK) == ERR_WARNING &&
      (severity & ERR_WARN_MASK) != 0 &&
      suppressed[ (severity & ERR_WARN_MASK) >> ERR_WARN_SHR ]) ||
    /*
     * See if it's a pass-one only warning and we're not in pass one.
     */
      ((severity & ERR_PASS1) && pass0 == 2);
}

/**
 * common error reporting
 * This is the common back end of the error reporting schemes currently
 * implemented.  It prints the nature of the warning and then the 
 * specific error message to error_file and may or may not return.  It
 * doesn't return if the error severity is a "panic" or "debug" type.
 * 
 * @param severity the severity of the warning or error 
 * @param fmt the printf style format string
 */
static void report_error_common (int severity, const char *fmt, va_list args)
{
    switch (severity & ERR_MASK) {
      case ERR_WARNING:
      fputs ("warning: ", error_file); break;
      case ERR_NONFATAL:
      fputs ("error: ", error_file); break;
      case ERR_FATAL:
      fputs ("fatal: ", error_file); break;
      case ERR_PANIC:
      fputs ("panic: ", error_file); break;
      case ERR_DEBUG:
        fputs("debug: ", error_file); break;
    }

    vfprintf (error_file, fmt, args);
    fputc ('\n', error_file);

    if (severity & ERR_USAGE)
      want_usage = TRUE;

    switch (severity & ERR_MASK) {
      case ERR_WARNING: case ERR_DEBUG:
      /* no further action, by definition */
      break;
      case ERR_NONFATAL:
      /* hack enables listing(!) on errors */
        terminate_after_phase = TRUE;
      break;
      case ERR_FATAL:
      if (ofile) {
          fclose(ofile);
          remove(outname);
      }
      if (want_usage)
          usage();
      exit(1);                 /* instantly die */
      break;                         /* placate silly compilers */
      case ERR_PANIC:
      fflush(NULL);
/*    abort();    */           /* halt, catch fire, and dump core */
      exit(3);
      break;
    }
}

static void usage(void)
{
    fputs("type `nasm -h' for help\n", error_file);
}

static void register_output_formats(void)
{
    ofmt = ofmt_register (report_error);
}

#define BUF_DELTA 512

static FILE *no_pp_fp;
static efunc no_pp_err;
static ListGen *no_pp_list;
static long no_pp_lineinc;

static void no_pp_reset (char *file, int pass, efunc error, evalfunc eval,
                   ListGen *listgen)
{
    src_set_fname(nasm_strdup(file));
    src_set_linnum(0);
    no_pp_lineinc = 1;
    no_pp_err = error;
    no_pp_fp = fopen(file, "r");
    if (!no_pp_fp)
      no_pp_err (ERR_FATAL | ERR_NOFILE,
               "unable to open input file `%s'", file);
    no_pp_list = listgen;
    (void) pass;               /* placate compilers */
    (void) eval;               /* placate compilers */
}

static char *no_pp_getline (void)
{
    char *buffer, *p, *q;
    int bufsize;

    bufsize = BUF_DELTA;
    buffer = nasm_malloc(BUF_DELTA);
    src_set_linnum(src_get_linnum() + no_pp_lineinc);

    while (1) {   /* Loop to handle %line */

      p = buffer;
      while (1) {  /* Loop to handle long lines */
          q = fgets(p, bufsize-(p-buffer), no_pp_fp);
          if (!q)
            break;
          p += strlen(p);
          if (p > buffer && p[-1] == '\n')
            break;
          if (p-buffer > bufsize-10) {
            int offset;
            offset = p - buffer;
            bufsize += BUF_DELTA;
            buffer = nasm_realloc(buffer, bufsize);
            p = buffer + offset;
          }
      }

      if (!q && p == buffer) {
          nasm_free (buffer);
          return NULL;
      }

      /*
       * Play safe: remove CRs, LFs and any spurious ^Zs, if any of
       * them are present at the end of the line.
       */
      buffer[strcspn(buffer, "\r\n\032")] = '\0';

      if (!strncmp(buffer, "%line", 5)) {
          long ln;
          int  li;
          char *nm = nasm_malloc(strlen(buffer));
          if (sscanf(buffer+5, "%ld+%d %s", &ln, &li, nm) == 3) {
            nasm_free( src_set_fname(nm) );
            src_set_linnum(ln);
            no_pp_lineinc = li;
            continue;
          }
          nasm_free(nm);
      }
      break;
    }

    no_pp_list->line (LIST_READ, buffer);

    return buffer;
}

static void no_pp_cleanup (int pass)
{
    fclose(no_pp_fp);
}

static unsigned long get_cpu (char *value)
{

    if (!strcmp(value, "8086")) return IF_8086;
    if (!strcmp(value, "186")) return IF_186;
    if (!strcmp(value, "286")) return IF_286;
    if (!strcmp(value, "386")) return IF_386;
    if (!strcmp(value, "486")) return IF_486;
    if (!strcmp(value, "586")    ||
      !nasm_stricmp(value, "pentium") )   return IF_PENT;
    if (!strcmp(value, "686")  ||
      !nasm_stricmp(value, "ppro") ||
      !nasm_stricmp(value, "pentiumpro") ||
      !nasm_stricmp(value, "p2")    )     return IF_P6;
    if (!nasm_stricmp(value, "p3")    ||
      !nasm_stricmp(value, "katmai") )    return IF_KATMAI;
    if (!nasm_stricmp(value, "p4")    ||  /* is this right? -- jrc */
      !nasm_stricmp(value, "willamette") )      return IF_WILLAMETTE;
    if (!nasm_stricmp(value, "prescott") )      return IF_PRESCOTT;
    if (!nasm_stricmp(value, "ia64") ||
      !nasm_stricmp(value, "ia-64") ||
      !nasm_stricmp(value, "itanium") ||
      !nasm_stricmp(value, "itanic") ||
      !nasm_stricmp(value, "merced") )    return IF_IA64;

    report_error (pass0<2 ? ERR_NONFATAL : ERR_FATAL, "unknown 'cpu' type");

    return IF_PLEVEL;   /* the maximum level */
}


static int get_bits (char *value)
{
    int i;

    if ((i = atoi(value)) == 16)  return i;   /* set for a 16-bit segment */
    else if (i == 32) {
      if (cpu < IF_386) {
          report_error(ERR_NONFATAL,
            "cannot specify 32-bit segment on processor below a 386");
          i = 16;
      }
    } else {
      report_error(pass0<2 ? ERR_NONFATAL : ERR_FATAL,
         "`%s' is not a valid segment size; must be 16 or 32",
         value);
      i = 16;
    }
    return i;
}

/* end of nasm.c */

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