gcc/genconstants.c

   1 /* Generate from machine description:
   2    a series of #define statements, one for each constant named in
   3    a (define_constants ...) pattern.
   4
   5    Copyright (C) 1987, 1991, 1995, 1998, 1999, 2000, 2001, 2003, 2004,
   6    2007  Free Software Foundation, Inc.
   7
   8 This file is part of GCC.
   9
  10 GCC is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 3, or (at your option)
  13 any later version.
  14
  15 GCC is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GCC; see the file COPYING3.  If not see
  22 <http://www.gnu.org/licenses/>.  */
  23
  24 /* This program does not use gensupport.c because it does not need to
  25    look at insn patterns, only (define_constants), and we want to
  26    minimize dependencies.  */
  27
  28 #include "bconfig.h"
  29 #include "system.h"
  30 #include "coretypes.h"
  31 #include "errors.h"
  32 #include "read-md.h"
  33
  34 /* Called via traverse_md_constants; emit a #define for
  35    the current constant definition.  */
  36
  37 static int
  38 print_md_constant (void **slot, void *info)
  39 {
  40   struct md_constant *def = (struct md_constant *) *slot;
  41   FILE *file = (FILE *) info;
  42
  43   fprintf (file, "#define %s %s\n", def->name, def->value);
  44   return 1;
  45 }
  46
  47 int
  48 main (int argc, char **argv)
  49 {
  50   progname = "genconstants";
  51
  52   if (!read_md_files (argc, argv, NULL, NULL))
  53     return (FATAL_EXIT_CODE);
  54
  55   /* Initializing the MD reader has the side effect of loading up
  56      the constants table that we wish to scan.  */
  57
  58   puts ("/* Generated automatically by the program `genconstants'");
  59   puts ("   from the machine description file `md'.  */\n");
  60   puts ("#ifndef GCC_INSN_CONSTANTS_H");
  61   puts ("#define GCC_INSN_CONSTANTS_H\n");
  62
  63   traverse_md_constants (print_md_constant, stdout);
  64
  65   puts ("\n#endif /* GCC_INSN_CONSTANTS_H */");
  66
  67   if (ferror (stdout) || fflush (stdout) || fclose (stdout))
  68     return FATAL_EXIT_CODE;
  69
  70   return SUCCESS_EXIT_CODE;
  71 }