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 "obstack.h"
  29 #include "errors.h"
  30
  31 static struct obstack obstack;
  32 struct obstack *rtl_obstack = &obstack;
  33
  34 #define obstack_chunk_alloc xmalloc
  35 #define obstack_chunk_free free
  36
  37 static int insn_code_number;
  38
  39 static void gen_insn PARAMS ((rtx));
  40
  41 static void
  42 gen_insn (insn)
  43      rtx insn;
  44 {
  45   /* Don't mention instructions whose names are the null string
  46      or begin with '*'.  They are in the machine description just
  47      to be recognized.  */
  48   if (XSTR (insn, 0)[0] != 0 && XSTR (insn, 0)[0] != '*')
  49     printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
  50             insn_code_number);
  51 }
  52
  53 PTR
  54 xmalloc (size)
  55   size_t size;
  56 {
  57   register PTR val = (PTR) malloc (size);
  58
  59   if (val == 0)
  60     fatal ("virtual memory exhausted");
  61   return val;
  62 }
  63
  64 PTR
  65 xrealloc (old, size)
  66   PTR old;
  67   size_t size;
  68 {
  69   register PTR ptr;
  70   if (old)
  71     ptr = (PTR) realloc (old, size);
  72   else
  73     ptr = (PTR) malloc (size);
  74   if (!ptr)
  75     fatal ("virtual memory exhausted");
  76   return ptr;
  77 }
  78
  79 extern int main PARAMS ((int, char **));
  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       return (FATAL_EXIT_CODE);
 101     }
 102   read_rtx_filename = argv[1];
 103
 104   printf ("/* Generated automatically by the program `gencodes'\n\
 105 from the machine description file `md'.  */\n\n");
 106
 107   printf ("#ifndef MAX_INSN_CODE\n\n");
 108
 109   /* Read the machine description.  */
 110
 111   insn_code_number = 0;
 112   printf ("enum insn_code {\n");
 113
 114   while (1)
 115     {
 116       c = read_skip_spaces (infile);
 117       if (c == EOF)
 118         break;
 119       ungetc (c, infile);
 120
 121       desc = read_rtx (infile);
 122       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 123         {
 124           gen_insn (desc);
 125           insn_code_number++;
 126         }
 127       if (GET_CODE (desc) == DEFINE_PEEPHOLE
 128           || GET_CODE (desc) == DEFINE_PEEPHOLE2
 129           || GET_CODE (desc) == DEFINE_SPLIT)
 130         {
 131           insn_code_number++;
 132         }
 133     }
 134
 135   printf ("  CODE_FOR_nothing };\n");
 136
 137   printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n");
 138
 139   printf ("#endif /* MAX_INSN_CODE */\n");
 140
 141   fflush (stdout);
 142   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 143 }
 144
 145 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
 146 const char *
 147 get_insn_name (code)
 148      int code ATTRIBUTE_UNUSED;
 149 {
 150   return NULL;
 151 }