gcc/gencodes.c

/* Generate from machine description:
   - some macros CODE_FOR_... giving the insn_code_number value
   for each of the defined standard insn names.
   Copyright (C) 1987, 1991, 1995, 1998,
   1999, 2000, 2001 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */


#include "hconfig.h"
#include "system.h"
#include "rtl.h"
#include "errors.h"
#include "gensupport.h"


static int insn_code_number;

static void gen_insn PARAMS ((rtx));
static void output_predicate_decls PARAMS ((void));
static int print_md_constant PARAMS ((void **, void *));

static void
gen_insn (insn)
     rtx insn;
{
  /* Don't mention instructions whose names are the null string
     or begin with '*'.  They are in the machine description just
     to be recognized.  */
  if (XSTR (insn, 0)[0] != 0 && XSTR (insn, 0)[0] != '*')
    printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
	    insn_code_number);
}

/* Print out declarations for all predicates mentioned in
   PREDICATE_CODES.  */

static void
output_predicate_decls ()
{
#ifdef PREDICATE_CODES
  static struct {
    const char *name;
    RTX_CODE codes[NUM_RTX_CODE];
  } predicate[] = {
    PREDICATE_CODES
  };
  size_t i;

  putc ('\n', stdout);
  puts ("struct rtx_def;\n#include \"machmode.h\"\n");
  for (i = 0; i < sizeof predicate / sizeof *predicate; i++)
    printf ("extern int %s PARAMS ((struct rtx_def *, enum machine_mode));\n",
	    predicate[i].name);
  putc ('\n', stdout);
#endif
}

extern int main PARAMS ((int, char **));

int
main (argc, argv)
     int argc;
     char **argv;
{
  rtx desc;

  progname = "gencodes";

  if (argc <= 1)
    fatal ("No input file name.");

  if (init_md_reader (argv[1]) != SUCCESS_EXIT_CODE)
    return (FATAL_EXIT_CODE);

  printf ("/* Generated automatically by the program `gencodes'\n\
from the machine description file `md'.  */\n\n");

  printf ("#ifndef MAX_INSN_CODE\n\n");

  /* Read the machine description.  */

  insn_code_number = 0;
  printf ("enum insn_code {\n");

  while (1)
    {
      int line_no;

      desc = read_md_rtx (&line_no, &insn_code_number);
      if (desc == NULL)
	break;

      if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
	gen_insn (desc);
    }

  printf ("  CODE_FOR_nothing = %d };\n", insn_code_number + 1);

  printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n\n");

  traverse_md_constants (print_md_constant, stdout);

  output_predicate_decls ();

  printf ("\n#endif /* MAX_INSN_CODE */\n");

  fflush (stdout);
  return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
}

/* Define this so we can link with print-rtl.o to get debug_rtx function.  */

const char *
get_insn_name (code)
     int code ATTRIBUTE_UNUSED;
{
  return NULL;
}

/* Called via traverse_md_constants; emit a #define for
   the current constant definition.  */

static int
print_md_constant (slot, info)
     void **slot;
     void *info;
{
  struct md_constant *def = *slot;
  FILE *file = info;

  fprintf (file, "#define %s %s\n", def->name, def->value);
  return 1;
}