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 "tm.h"
  32 #include "rtl.h"
  33 #include "errors.h"
  34 #include "gensupport.h"
  35
  36 /* Called via traverse_md_constants; emit a #define for
  37    the current constant definition.  */
  38
  39 static int
  40 print_md_constant (void **slot, void *info)
  41 {
  42   struct md_constant *def = (struct md_constant *) *slot;
  43   FILE *file = (FILE *) info;
  44
  45   fprintf (file, "#define %s %s\n", def->name, def->value);
  46   return 1;
  47 }
  48
  49 int
  50 main (int argc, char **argv)
  51 {
  52   progname = "genconstants";
  53
  54   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
  55     return (FATAL_EXIT_CODE);
  56
  57   /* Initializing the MD reader has the side effect of loading up
  58      the constants table that we wish to scan.  */
  59
  60   puts ("/* Generated automatically by the program `genconstants'");
  61   puts ("   from the machine description file `md'.  */\n");
  62   puts ("#ifndef GCC_INSN_CONSTANTS_H");
  63   puts ("#define GCC_INSN_CONSTANTS_H\n");
  64
  65   traverse_md_constants (print_md_constant, stdout);
  66
  67   puts ("\n#endif /* GCC_INSN_CONSTANTS_H */");
  68
  69   if (ferror (stdout) || fflush (stdout) || fclose (stdout))
  70     return FATAL_EXIT_CODE;
  71
  72   return SUCCESS_EXIT_CODE;
  73 }