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 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 "errors.h"
  29 #include "gensupport.h"
  30
  31
  32 static int insn_code_number;
  33
  34 static void gen_insn PARAMS ((rtx));
  35 static void output_predicate_decls PARAMS ((void));
  36 static int print_md_constant PARAMS ((void **, void *));
  37
  38 static void
  39 gen_insn (insn)
  40      rtx insn;
  41 {
  42   /* Don't mention instructions whose names are the null string
  43      or begin with '*'.  They are in the machine description just
  44      to be recognized.  */
  45   if (XSTR (insn, 0)[0] != 0 && XSTR (insn, 0)[0] != '*')
  46     printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
  47             insn_code_number);
  48 }
  49
  50 /* Print out declarations for all predicates mentioned in
  51    PREDICATE_CODES.  */
  52
  53 static void
  54 output_predicate_decls ()
  55 {
  56 #ifdef PREDICATE_CODES
  57   static struct {
  58     const char *name;
  59     RTX_CODE codes[NUM_RTX_CODE];
  60   } predicate[] = {
  61     PREDICATE_CODES
  62   };
  63   size_t i;
  64
  65   putc ('\n', stdout);
  66   puts ("struct rtx_def;\n#include \"machmode.h\"\n");
  67   for (i = 0; i < sizeof predicate / sizeof *predicate; i++)
  68     printf ("extern int %s PARAMS ((struct rtx_def *, enum machine_mode));\n",
  69             predicate[i].name);
  70   putc ('\n', stdout);
  71 #endif
  72 }
  73
  74 extern int main PARAMS ((int, char **));
  75
  76 int
  77 main (argc, argv)
  78      int argc;
  79      char **argv;
  80 {
  81   rtx desc;
  82
  83   progname = "gencodes";
  84
  85   if (argc <= 1)
  86     fatal ("No input file name.");
  87
  88   if (init_md_reader (argv[1]) != SUCCESS_EXIT_CODE)
  89     return (FATAL_EXIT_CODE);
  90
  91   printf ("/* Generated automatically by the program `gencodes'\n\
  92 from the machine description file `md'.  */\n\n");
  93
  94   printf ("#ifndef MAX_INSN_CODE\n\n");
  95
  96   /* Read the machine description.  */
  97
  98   insn_code_number = 0;
  99   printf ("enum insn_code {\n");
 100
 101   while (1)
 102     {
 103       int line_no;
 104
 105       desc = read_md_rtx (&line_no, &insn_code_number);
 106       if (desc == NULL)
 107         break;
 108
 109       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 110         gen_insn (desc);
 111     }
 112
 113   printf ("  CODE_FOR_nothing = %d };\n", insn_code_number + 1);
 114
 115   printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n\n");
 116
 117   traverse_md_constants (print_md_constant, stdout);
 118
 119   output_predicate_decls ();
 120
 121   printf ("\n#endif /* MAX_INSN_CODE */\n");
 122
 123   fflush (stdout);
 124   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 125 }
 126
 127 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
 128
 129 const char *
 130 get_insn_name (code)
 131      int code ATTRIBUTE_UNUSED;
 132 {
 133   return NULL;
 134 }
 135
 136 /* Called via traverse_md_constants; emit a #define for
 137    the current constant definition.  */
 138
 139 static int
 140 print_md_constant (slot, info)
 141      void **slot;
 142      void *info;
 143 {
 144   struct md_constant *def = *slot;
 145   FILE *file = info;
 146
 147   fprintf (file, "#define %s %s\n", def->name, def->value);
 148   return 1;
 149 }