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 "bconfig.h"
  26 #include "system.h"
  27 #include "coretypes.h"
  28 #include "tm.h"
  29 #include "rtl.h"
  30 #include "errors.h"
  31 #include "gensupport.h"
  32
  33 static void gen_insn PARAMS ((rtx, int));
  34
  35 static void
  36 gen_insn (insn, code)
  37      rtx insn;
  38      int code;
  39 {
  40   const char *name = XSTR (insn, 0);
  41   int truth = maybe_eval_c_test (XSTR (insn, 2));
  42
  43   /* Don't mention instructions whose names are the null string
  44      or begin with '*'.  They are in the machine description just
  45      to be recognized.  */
  46   if (name[0] != 0 && name[0] != '*')
  47     {
  48       if (truth == 0)
  49         printf ("#define CODE_FOR_%s CODE_FOR_nothing\n", name);
  50       else
  51         printf ("  CODE_FOR_%s = %d,\n", name, code);
  52     }
  53 }
  54
  55 extern int main PARAMS ((int, char **));
  56
  57 int
  58 main (argc, argv)
  59      int argc;
  60      char **argv;
  61 {
  62   rtx desc;
  63
  64   progname = "gencodes";
  65
  66   /* We need to see all the possibilities.  Elided insns may have
  67      direct references to CODE_FOR_xxx in C code.  */
  68   insn_elision = 0;
  69
  70   if (argc <= 1)
  71     fatal ("no input file name");
  72
  73   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
  74     return (FATAL_EXIT_CODE);
  75
  76   puts ("\
  77 /* Generated automatically by the program `gencodes'\n\
  78    from the machine description file `md'.  */\n\
  79 \n\
  80 #ifndef GCC_INSN_CODES_H\n\
  81 #define GCC_INSN_CODES_H\n\
  82 \n\
  83 enum insn_code {");
  84
  85   /* Read the machine description.  */
  86
  87   while (1)
  88     {
  89       int line_no;
  90       int insn_code_number;
  91
  92       desc = read_md_rtx (&line_no, &insn_code_number);
  93       if (desc == NULL)
  94         break;
  95
  96       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
  97         gen_insn (desc, insn_code_number);
  98     }
  99
 100   puts ("  CODE_FOR_nothing\n\
 101 };\n\
 102 \n\
 103 #endif /* GCC_INSN_CODES_H */");
 104
 105   if (ferror (stdout) || fflush (stdout) || fclose (stdout))
 106     return FATAL_EXIT_CODE;
 107
 108   return SUCCESS_EXIT_CODE;
 109 }
 110
 111 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
 112
 113 const char *
 114 get_insn_name (code)
 115      int code ATTRIBUTE_UNUSED;
 116 {
 117   return NULL;
 118 }