gcc/gencodes.c

   1 /* Generate from machine description:
   2
   3    - some macros CODE_FOR_... giving the insn_code_number value
   4    for each of the defined standard insn names.
   5    Copyright (C) 1987, 1991, 1995 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 "obstack.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 static void fatal PVPROTO ((const char *, ...))
  37   ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  38 void fancy_abort PROTO((void)) ATTRIBUTE_NORETURN;
  39
  40 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
  41 char **insn_name_ptr = 0;
  42
  43 static int insn_code_number;
  44
  45 static void gen_insn PROTO((rtx));
  46
  47 static void
  48 gen_insn (insn)
  49      rtx insn;
  50 {
  51   /* Don't mention instructions whose names are the null string
  52      or begin with '*'.  They are in the machine description just
  53      to be recognized.  */
  54   if (XSTR (insn, 0)[0] != 0 && XSTR (insn, 0)[0] != '*')
  55     printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
  56             insn_code_number);
  57 }
  58
  59 PTR
  60 xmalloc (size)
  61   size_t size;
  62 {
  63   register PTR val = (PTR) malloc (size);
  64
  65   if (val == 0)
  66     fatal ("virtual memory exhausted");
  67   return val;
  68 }
  69
  70 PTR
  71 xrealloc (ptr, size)
  72   PTR ptr;
  73   size_t size;
  74 {
  75   register PTR result = (PTR) realloc (ptr, size);
  76   if (!result)
  77     fatal ("virtual memory exhausted");
  78   return result;
  79 }
  80
  81 static void
  82 fatal VPROTO ((const char *format, ...))
  83 {
  84 #ifndef ANSI_PROTOTYPES
  85   const char *format;
  86 #endif
  87   va_list ap;
  88
  89   VA_START (ap, format);
  90
  91 #ifndef ANSI_PROTOTYPES
  92   format = va_arg (ap, const char *);
  93 #endif
  94
  95   fprintf (stderr, "gencodes: ");
  96   vfprintf (stderr, format, ap);
  97   va_end (ap);
  98   fprintf (stderr, "\n");
  99   exit (FATAL_EXIT_CODE);
 100 }
 101
 102 /* More 'friendly' abort that prints the line and file.
 103    config.h can #define abort fancy_abort if you like that sort of thing.  */
 104
 105 void
 106 fancy_abort ()
 107 {
 108   fatal ("Internal gcc abort.");
 109 }
 110 \f
 111 int
 112 main (argc, argv)
 113      int argc;
 114      char **argv;
 115 {
 116   rtx desc;
 117   FILE *infile;
 118   register int c;
 119
 120   obstack_init (rtl_obstack);
 121
 122   if (argc <= 1)
 123     fatal ("No input file name.");
 124
 125   infile = fopen (argv[1], "r");
 126   if (infile == 0)
 127     {
 128       perror (argv[1]);
 129       exit (FATAL_EXIT_CODE);
 130     }
 131
 132   init_rtl ();
 133
 134   printf ("/* Generated automatically by the program `gencodes'\n\
 135 from the machine description file `md'.  */\n\n");
 136
 137   printf ("#ifndef MAX_INSN_CODE\n\n");
 138
 139   /* Read the machine description.  */
 140
 141   insn_code_number = 0;
 142   printf ("enum insn_code {\n");
 143
 144   while (1)
 145     {
 146       c = read_skip_spaces (infile);
 147       if (c == EOF)
 148         break;
 149       ungetc (c, infile);
 150
 151       desc = read_rtx (infile);
 152       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 153         {
 154           gen_insn (desc);
 155           insn_code_number++;
 156         }
 157       if (GET_CODE (desc) == DEFINE_PEEPHOLE
 158           || GET_CODE (desc) == DEFINE_SPLIT)
 159         {
 160           insn_code_number++;
 161         }
 162     }
 163
 164   printf ("  CODE_FOR_nothing };\n");
 165
 166   printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n");
 167
 168   printf ("#endif /* MAX_INSN_CODE */\n");
 169
 170   fflush (stdout);
 171   exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 172   /* NOTREACHED */
 173   return 0;
 174 }