gcc/gencodes.c

   1 /* Generate from machine description:
   2    - some macros CODE_FOR_... giving the insn_code_number value
   3    for each of the defined standard insn names.
   4    Copyright (C) 1987, 1991, 1995, 1998,
   5    1999, 2000 Free Software Foundation, Inc.
   6
   7 This file is part of GNU CC.
   8
   9 GNU CC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU CC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU CC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24
  25 #include "hconfig.h"
  26 #include "system.h"
  27 #include "rtl.h"
  28 #include "errors.h"
  29 #include "gensupport.h"
  30
  31
  32 static int insn_code_number;
  33
  34 static void gen_insn PARAMS ((rtx));
  35 static int print_md_constant PARAMS ((void **, void *));
  36
  37 static void
  38 gen_insn (insn)
  39      rtx insn;
  40 {
  41   /* Don't mention instructions whose names are the null string
  42      or begin with '*'.  They are in the machine description just
  43      to be recognized.  */
  44   if (XSTR (insn, 0)[0] != 0 && XSTR (insn, 0)[0] != '*')
  45     printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
  46             insn_code_number);
  47 }
  48
  49 extern int main PARAMS ((int, char **));
  50
  51 int
  52 main (argc, argv)
  53      int argc;
  54      char **argv;
  55 {
  56   rtx desc;
  57
  58   progname = "gencodes";
  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   printf ("/* Generated automatically by the program `gencodes'\n\
  67 from the machine description file `md'.  */\n\n");
  68
  69   printf ("#ifndef MAX_INSN_CODE\n\n");
  70
  71   /* Read the machine description.  */
  72
  73   insn_code_number = 0;
  74   printf ("enum insn_code {\n");
  75
  76   while (1)
  77     {
  78       int line_no;
  79
  80       desc = read_md_rtx (&line_no, &insn_code_number);
  81       if (desc == NULL)
  82         break;
  83
  84       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
  85         gen_insn (desc);
  86     }
  87
  88   printf ("  CODE_FOR_nothing = %d };\n", insn_code_number + 1);
  89
  90   printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n\n");
  91
  92   traverse_md_constants (print_md_constant, stdout);
  93
  94   printf ("\n#endif /* MAX_INSN_CODE */\n");
  95
  96   fflush (stdout);
  97   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
  98 }
  99
 100 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
 101
 102 const char *
 103 get_insn_name (code)
 104      int code ATTRIBUTE_UNUSED;
 105 {
 106   return NULL;
 107 }
 108
 109 /* Called via traverse_md_constants; emit a #define for
 110    the current constant definition.  */
 111
 112 static int
 113 print_md_constant (slot, info)
 114      void **slot;
 115      void *info;
 116 {
 117   struct md_constant *def = *slot;
 118   FILE *file = info;
 119
 120   fprintf (file, "#define %s %s\n", def->name, def->value);
 121   return 1;
 122 }