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, 1999 Free Software Foundation, Inc.
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU CC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23
  24 #include "hconfig.h"
  25 #include "system.h"
  26 #include "rtl.h"
  27 #include "obstack.h"
  28 #include "errors.h"
  29
  30 static struct obstack obstack;
  31 struct obstack *rtl_obstack = &obstack;
  32
  33 #define obstack_chunk_alloc xmalloc
  34 #define obstack_chunk_free free
  35
  36 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
  37 char **insn_name_ptr = 0;
  38
  39 static int insn_code_number;
  40
  41 static void gen_insn PROTO((rtx));
  42
  43 static void
  44 gen_insn (insn)
  45      rtx insn;
  46 {
  47   /* Don't mention instructions whose names are the null string
  48      or begin with '*'.  They are in the machine description just
  49      to be recognized.  */
  50   if (XSTR (insn, 0)[0] != 0 && XSTR (insn, 0)[0] != '*')
  51     printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
  52             insn_code_number);
  53 }
  54
  55 PTR
  56 xmalloc (size)
  57   size_t size;
  58 {
  59   register PTR val = (PTR) malloc (size);
  60
  61   if (val == 0)
  62     fatal ("virtual memory exhausted");
  63   return val;
  64 }
  65
  66 PTR
  67 xrealloc (old, size)
  68   PTR old;
  69   size_t size;
  70 {
  71   register PTR ptr;
  72   if (old)
  73     ptr = (PTR) realloc (old, size);
  74   else
  75     ptr = (PTR) malloc (size);
  76   if (!ptr)
  77     fatal ("virtual memory exhausted");
  78   return ptr;
  79 }
  80
  81 int
  82 main (argc, argv)
  83      int argc;
  84      char **argv;
  85 {
  86   rtx desc;
  87   FILE *infile;
  88   register int c;
  89
  90   progname = "gencodes";
  91   obstack_init (rtl_obstack);
  92
  93   if (argc <= 1)
  94     fatal ("No input file name.");
  95
  96   infile = fopen (argv[1], "r");
  97   if (infile == 0)
  98     {
  99       perror (argv[1]);
 100       exit (FATAL_EXIT_CODE);
 101     }
 102
 103   printf ("/* Generated automatically by the program `gencodes'\n\
 104 from the machine description file `md'.  */\n\n");
 105
 106   printf ("#ifndef MAX_INSN_CODE\n\n");
 107
 108   /* Read the machine description.  */
 109
 110   insn_code_number = 0;
 111   printf ("enum insn_code {\n");
 112
 113   while (1)
 114     {
 115       c = read_skip_spaces (infile);
 116       if (c == EOF)
 117         break;
 118       ungetc (c, infile);
 119
 120       desc = read_rtx (infile);
 121       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 122         {
 123           gen_insn (desc);
 124           insn_code_number++;
 125         }
 126       if (GET_CODE (desc) == DEFINE_PEEPHOLE
 127           || GET_CODE (desc) == DEFINE_PEEPHOLE2
 128           || GET_CODE (desc) == DEFINE_SPLIT)
 129         {
 130           insn_code_number++;
 131         }
 132     }
 133
 134   printf ("  CODE_FOR_nothing };\n");
 135
 136   printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n");
 137
 138   printf ("#endif /* MAX_INSN_CODE */\n");
 139
 140   fflush (stdout);
 141   exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 142   /* NOTREACHED */
 143   return 0;
 144 }