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 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
  36 static void
  37 gen_insn (insn)
  38      rtx insn;
  39 {
  40   /* Don't mention instructions whose names are the null string
  41      or begin with '*'.  They are in the machine description just
  42      to be recognized.  */
  43   if (XSTR (insn, 0)[0] != 0 && XSTR (insn, 0)[0] != '*')
  44     printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
  45             insn_code_number);
  46 }
  47
  48 PTR
  49 xmalloc (size)
  50   size_t size;
  51 {
  52   register PTR val = (PTR) malloc (size);
  53
  54   if (val == 0)
  55     fatal ("virtual memory exhausted");
  56   return val;
  57 }
  58
  59 PTR
  60 xrealloc (old, size)
  61   PTR old;
  62   size_t size;
  63 {
  64   register PTR ptr;
  65   if (old)
  66     ptr = (PTR) realloc (old, size);
  67   else
  68     ptr = (PTR) malloc (size);
  69   if (!ptr)
  70     fatal ("virtual memory exhausted");
  71   return ptr;
  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 };\n");
 114
 115   printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n");
 116
 117   printf ("#endif /* MAX_INSN_CODE */\n");
 118
 119   fflush (stdout);
 120   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 121 }
 122
 123 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
 124 const char *
 125 get_insn_name (code)
 126      int code ATTRIBUTE_UNUSED;
 127 {
 128   return NULL;
 129 }