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, 2001 Free Software Foundation, Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 2, or (at your option) any later
  12 version.
  13
  14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING.  If not, write to the Free
  21 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  22 02111-1307, USA.  */
  23
  24
  25 #include "hconfig.h"
  26 #include "system.h"
  27 #include "rtl.h"
  28 #include "errors.h"
  29 #include "gensupport.h"
  30
  31 static void gen_insn PARAMS ((rtx, int));
  32
  33 static void
  34 gen_insn (insn, code)
  35      rtx insn;
  36      int code;
  37 {
  38   const char *name = XSTR (insn, 0);
  39   int truth = maybe_eval_c_test (XSTR (insn, 2));
  40
  41   /* Don't mention instructions whose names are the null string
  42      or begin with '*'.  They are in the machine description just
  43      to be recognized.  */
  44   if (name[0] != 0 && name[0] != '*')
  45     {
  46       if (truth == 0)
  47         printf ("#define CODE_FOR_%s CODE_FOR_nothing\n", name);
  48       else
  49         printf ("  CODE_FOR_%s = %d,\n", name, code);
  50     }
  51 }
  52
  53 extern int main PARAMS ((int, char **));
  54
  55 int
  56 main (argc, argv)
  57      int argc;
  58      char **argv;
  59 {
  60   rtx desc;
  61
  62   progname = "gencodes";
  63
  64   /* We need to see all the possibilities.  Elided insns may have
  65      direct references to CODE_FOR_xxx in C code.  */
  66   insn_elision = 0;
  67
  68   if (argc <= 1)
  69     fatal ("no input file name");
  70
  71   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
  72     return (FATAL_EXIT_CODE);
  73
  74   puts ("\
  75 /* Generated automatically by the program `gencodes'\n\
  76    from the machine description file `md'.  */\n\
  77 \n\
  78 #ifndef GCC_INSN_CODES_H\n\
  79 #define GCC_INSN_CODES_H\n\
  80 \n\
  81 enum insn_code {");
  82
  83   /* Read the machine description.  */
  84
  85   while (1)
  86     {
  87       int line_no;
  88       int insn_code_number;
  89
  90       desc = read_md_rtx (&line_no, &insn_code_number);
  91       if (desc == NULL)
  92         break;
  93
  94       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
  95         gen_insn (desc, insn_code_number);
  96     }
  97
  98   puts ("  CODE_FOR_nothing\n\
  99 };\n\
 100 \n\
 101 #endif /* GCC_INSN_CODES_H */");
 102
 103   if (ferror (stdout) || fflush (stdout) || fclose (stdout))
 104     return FATAL_EXIT_CODE;
 105
 106   return SUCCESS_EXIT_CODE;
 107 }
 108
 109 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
 110
 111 const char *
 112 get_insn_name (code)
 113      int code ATTRIBUTE_UNUSED;
 114 {
 115   return NULL;
 116 }