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, 1998, 1999 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 (old, size)
  72   PTR old;
  73   size_t size;
  74 {
  75   register PTR ptr;
  76   if (old)
  77     ptr = (PTR) realloc (old, size);
  78   else
  79     ptr = (PTR) malloc (size);
  80   if (!ptr)
  81     fatal ("virtual memory exhausted");
  82   return ptr;
  83 }
  84
  85 static void
  86 fatal VPROTO ((const char *format, ...))
  87 {
  88 #ifndef ANSI_PROTOTYPES
  89   const char *format;
  90 #endif
  91   va_list ap;
  92
  93   VA_START (ap, format);
  94
  95 #ifndef ANSI_PROTOTYPES
  96   format = va_arg (ap, const char *);
  97 #endif
  98
  99   fprintf (stderr, "gencodes: ");
 100   vfprintf (stderr, format, ap);
 101   va_end (ap);
 102   fprintf (stderr, "\n");
 103   exit (FATAL_EXIT_CODE);
 104 }
 105
 106 /* More 'friendly' abort that prints the line and file.
 107    config.h can #define abort fancy_abort if you like that sort of thing.  */
 108
 109 void
 110 fancy_abort ()
 111 {
 112   fatal ("Internal gcc abort.");
 113 }
 114 \f
 115 int
 116 main (argc, argv)
 117      int argc;
 118      char **argv;
 119 {
 120   rtx desc;
 121   FILE *infile;
 122   register int c;
 123
 124   obstack_init (rtl_obstack);
 125
 126   if (argc <= 1)
 127     fatal ("No input file name.");
 128
 129   infile = fopen (argv[1], "r");
 130   if (infile == 0)
 131     {
 132       perror (argv[1]);
 133       exit (FATAL_EXIT_CODE);
 134     }
 135
 136   init_rtl ();
 137
 138   printf ("/* Generated automatically by the program `gencodes'\n\
 139 from the machine description file `md'.  */\n\n");
 140
 141   printf ("#ifndef MAX_INSN_CODE\n\n");
 142
 143   /* Read the machine description.  */
 144
 145   insn_code_number = 0;
 146   printf ("enum insn_code {\n");
 147
 148   while (1)
 149     {
 150       c = read_skip_spaces (infile);
 151       if (c == EOF)
 152         break;
 153       ungetc (c, infile);
 154
 155       desc = read_rtx (infile);
 156       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 157         {
 158           gen_insn (desc);
 159           insn_code_number++;
 160         }
 161       if (GET_CODE (desc) == DEFINE_PEEPHOLE
 162           || GET_CODE (desc) == DEFINE_SPLIT)
 163         {
 164           insn_code_number++;
 165         }
 166     }
 167
 168   printf ("  CODE_FOR_nothing };\n");
 169
 170   printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n");
 171
 172   printf ("#endif /* MAX_INSN_CODE */\n");
 173
 174   fflush (stdout);
 175   exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 176   /* NOTREACHED */
 177   return 0;
 178 }