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
   6    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 2, 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 COPYING.  If not, write to
  22 the Free Software Foundation, 59 Temple Place - Suite 330,
  23 Boston, MA 02111-1307, USA.  */
  24
  25 /* This program does not use gensupport.c because it does not need to
  26    look at insn patterns, only (define_constants), and we want to
  27    minimize dependencies.  */
  28
  29 #include "bconfig.h"
  30 #include "system.h"
  31 #include "coretypes.h"
  32 #include "tm.h"
  33 #include "rtl.h"
  34 #include "errors.h"
  35 #include "gensupport.h"
  36
  37 static int print_md_constant (void **, void *);
  38
  39 /* Called via traverse_md_constants; emit a #define for
  40    the current constant definition.  */
  41
  42 static int
  43 print_md_constant (void **slot, void *info)
  44 {
  45   struct md_constant *def = *slot;
  46   FILE *file = info;
  47
  48   fprintf (file, "#define %s %s\n", def->name, def->value);
  49   return 1;
  50 }
  51
  52 int
  53 main (int argc, char **argv)
  54 {
  55   int dummy1, dummy2;
  56   rtx desc;
  57
  58   progname = "genconstants";
  59
  60   if (argc <= 1)
  61     fatal ("no input file name");
  62
  63   if (init_md_reader (argv[1]) != SUCCESS_EXIT_CODE)
  64     return (FATAL_EXIT_CODE);
  65
  66   /* Scan and discard the entire file.  This has the side effect
  67      of loading up the constants table that we wish to scan.  */
  68   do
  69     desc = read_md_rtx (&dummy1, &dummy2);
  70   while (desc);
  71
  72   puts ("/* Generated automatically by the program `genconstants'");
  73   puts ("   from the machine description file `md'.  */\n");
  74   puts ("#ifndef GCC_INSN_CONSTANTS_H");
  75   puts ("#define GCC_INSN_CONSTANTS_H\n");
  76
  77   traverse_md_constants (print_md_constant, stdout);
  78
  79   puts ("\n#endif /* GCC_INSN_CONSTANTS_H */");
  80
  81   if (ferror (stdout) || fflush (stdout) || fclose (stdout))
  82     return FATAL_EXIT_CODE;
  83
  84   return SUCCESS_EXIT_CODE;
  85 }
  86