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, 91, 95, 98, 99, 2000 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 static int insn_code_number;
  37
  38 static void gen_insn PARAMS ((rtx));
  39
  40 static void
  41 gen_insn (insn)
  42      rtx insn;
  43 {
  44   /* Don't mention instructions whose names are the null string
  45      or begin with '*'.  They are in the machine description just
  46      to be recognized.  */
  47   if (XSTR (insn, 0)[0] != 0 && XSTR (insn, 0)[0] != '*')
  48     printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
  49             insn_code_number);
  50 }
  51
  52 PTR
  53 xmalloc (size)
  54   size_t size;
  55 {
  56   register PTR val = (PTR) malloc (size);
  57
  58   if (val == 0)
  59     fatal ("virtual memory exhausted");
  60   return val;
  61 }
  62
  63 PTR
  64 xrealloc (old, size)
  65   PTR old;
  66   size_t size;
  67 {
  68   register PTR ptr;
  69   if (old)
  70     ptr = (PTR) realloc (old, size);
  71   else
  72     ptr = (PTR) malloc (size);
  73   if (!ptr)
  74     fatal ("virtual memory exhausted");
  75   return ptr;
  76 }
  77
  78 extern int main PARAMS ((int, char **));
  79
  80 int
  81 main (argc, argv)
  82      int argc;
  83      char **argv;
  84 {
  85   rtx desc;
  86   FILE *infile;
  87   register int c;
  88
  89   progname = "gencodes";
  90   obstack_init (rtl_obstack);
  91
  92   if (argc <= 1)
  93     fatal ("No input file name.");
  94
  95   infile = fopen (argv[1], "r");
  96   if (infile == 0)
  97     {
  98       perror (argv[1]);
  99       return (FATAL_EXIT_CODE);
 100     }
 101   read_rtx_filename = argv[1];
 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   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 142 }
 143
 144 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
 145 const char *
 146 get_insn_name (code)
 147      int code ATTRIBUTE_UNUSED;
 148 {
 149   return NULL;
 150 }