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 "read-md.h"
  35 #include "gensupport.h"
  36
  37 /* Called via traverse_md_constants; emit a #define for
  38    the current constant definition.  */
  39
  40 static int
  41 print_md_constant (void **slot, void *info)
  42 {
  43   struct md_constant *def = (struct md_constant *) *slot;
  44   FILE *file = (FILE *) info;
  45
  46   fprintf (file, "#define %s %s\n", def->name, def->value);
  47   return 1;
  48 }
  49
  50 int
  51 main (int argc, char **argv)
  52 {
  53   progname = "genconstants";
  54
  55   if (!init_rtx_reader_args (argc, argv))
  56     return (FATAL_EXIT_CODE);
  57
  58   /* Initializing the MD reader has the side effect of loading up
  59      the constants table that we wish to scan.  */
  60
  61   puts ("/* Generated automatically by the program `genconstants'");
  62   puts ("   from the machine description file `md'.  */\n");
  63   puts ("#ifndef GCC_INSN_CONSTANTS_H");
  64   puts ("#define GCC_INSN_CONSTANTS_H\n");
  65
  66   traverse_md_constants (print_md_constant, stdout);
  67
  68   puts ("\n#endif /* GCC_INSN_CONSTANTS_H */");
  69
  70   if (ferror (stdout) || fflush (stdout) || fclose (stdout))
  71     return FATAL_EXIT_CODE;
  72
  73   return SUCCESS_EXIT_CODE;
  74 }