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, 1999, 2000, 2001, 2003,
   5    2004, 2007  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 3, 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 COPYING3.  If not see
  21 <http://www.gnu.org/licenses/>.  */
  22
  23
  24 #include "bconfig.h"
  25 #include "system.h"
  26 #include "coretypes.h"
  27 #include "tm.h"
  28 #include "rtl.h"
  29 #include "errors.h"
  30 #include "gensupport.h"
  31
  32 static void
  33 gen_insn (rtx insn, int code)
  34 {
  35   const char *name = XSTR (insn, 0);
  36   int truth = maybe_eval_c_test (XSTR (insn, 2));
  37
  38   /* Don't mention instructions whose names are the null string
  39      or begin with '*'.  They are in the machine description just
  40      to be recognized.  */
  41   if (name[0] != 0 && name[0] != '*')
  42     {
  43       if (truth == 0)
  44         printf ("#define CODE_FOR_%s CODE_FOR_nothing\n", name);
  45       else
  46         printf ("  CODE_FOR_%s = %d,\n", name, code);
  47     }
  48 }
  49
  50 int
  51 main (int argc, char **argv)
  52 {
  53   rtx desc;
  54
  55   progname = "gencodes";
  56
  57   /* We need to see all the possibilities.  Elided insns may have
  58      direct references to CODE_FOR_xxx in C code.  */
  59   insn_elision = 0;
  60
  61   if (!init_rtx_reader_args (argc, argv))
  62     return (FATAL_EXIT_CODE);
  63
  64   puts ("\
  65 /* Generated automatically by the program `gencodes'\n\
  66    from the machine description file `md'.  */\n\
  67 \n\
  68 #ifndef GCC_INSN_CODES_H\n\
  69 #define GCC_INSN_CODES_H\n\
  70 \n\
  71 enum insn_code {");
  72
  73   /* Read the machine description.  */
  74
  75   while (1)
  76     {
  77       int line_no;
  78       int insn_code_number;
  79
  80       desc = read_md_rtx (&line_no, &insn_code_number);
  81       if (desc == NULL)
  82         break;
  83
  84       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
  85         gen_insn (desc, insn_code_number);
  86     }
  87
  88   puts ("  CODE_FOR_nothing\n\
  89 };\n\
  90 \n\
  91 #endif /* GCC_INSN_CODES_H */");
  92
  93   if (ferror (stdout) || fflush (stdout) || fclose (stdout))
  94     return FATAL_EXIT_CODE;
  95
  96   return SUCCESS_EXIT_CODE;
  97 }