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      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) 1987-2022 Free Software Foundation, Inc.
      5 
      6 This file is part of GCC.
      7 
      8 GCC is free software; you can redistribute it and/or modify it under
      9 the terms of the GNU General Public License as published by the Free
     10 Software Foundation; either version 3, or (at your option) any later
     11 version.
     12 
     13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
     14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
     15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
     16 for more details.
     17 
     18 You should have received a copy of the GNU General Public License
     19 along with GCC; see the file COPYING3.  If not see
     20 <http://www.gnu.org/licenses/>.  */
     21 
     22 
     23 #include "bconfig.h"
     24 #include "system.h"
     25 #include "coretypes.h"
     26 #include "tm.h"
     27 #include "rtl.h"
     28 #include "errors.h"
     29 #include "gensupport.h"
     30 
     31 static void
     32 gen_insn (md_rtx_info *info)
     33 {
     34   const char *name = XSTR (info->def, 0);
     35   int truth = maybe_eval_c_test (XSTR (info->def, 2));
     36 
     37   /* Don't mention instructions whose names are the null string
     38      or begin with '*'.  They are in the machine description just
     39      to be recognized.  */
     40   if (name[0] != 0 && name[0] != '*')
     41     {
     42       if (truth == 0)
     43 	printf (",\n   CODE_FOR_%s = CODE_FOR_nothing", name);
     44       else
     45 	printf (",\n  CODE_FOR_%s = %d", name, info->index);
     46     }
     47 }
     48 
     49 int
     50 main (int argc, const char **argv)
     51 {
     52   progname = "gencodes";
     53 
     54   /* We need to see all the possibilities.  Elided insns may have
     55      direct references to CODE_FOR_xxx in C code.  */
     56   insn_elision = 0;
     57 
     58   if (!init_rtx_reader_args (argc, argv))
     59     return (FATAL_EXIT_CODE);
     60 
     61   printf ("\
     62 /* Generated automatically by the program `gencodes'\n\
     63    from the machine description file `md'.  */\n\
     64 \n\
     65 #ifndef GCC_INSN_CODES_H\n\
     66 #define GCC_INSN_CODES_H\n\
     67 \n\
     68 enum insn_code {\n\
     69   CODE_FOR_nothing = 0");
     70 
     71   /* Read the machine description.  */
     72 
     73   md_rtx_info info;
     74   while (read_md_rtx (&info))
     75     switch (GET_CODE (info.def))
     76       {
     77       case DEFINE_INSN:
     78       case DEFINE_EXPAND:
     79 	gen_insn (&info);
     80 	break;
     81 
     82       default:
     83 	break;
     84     }
     85 
     86   printf ("\n};\n\
     87 \n\
     88 const unsigned int NUM_INSN_CODES = %d;\n\
     89 #endif /* GCC_INSN_CODES_H */\n", get_num_insn_codes ());
     90 
     91   if (ferror (stdout) || fflush (stdout) || fclose (stdout))
     92     return FATAL_EXIT_CODE;
     93 
     94   return SUCCESS_EXIT_CODE;
     95 }
     96