annotate gcc/genconstants.c @ 16:04ced10e8804

gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents f6334be47118
children 84e7813d76e9
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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1 /* Generate from machine description:
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2 a series of #define statements, one for each constant named in
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3 a (define_constants ...) pattern.
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4
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5 Copyright (C) 1987-2017 Free Software Foundation, Inc.
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7 This file is part of GCC.
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8
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9 GCC is free software; you can redistribute it and/or modify
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10 it under the terms of the GNU General Public License as published by
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11 the Free Software Foundation; either version 3, or (at your option)
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12 any later version.
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14 GCC is distributed in the hope that it will be useful,
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15 but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 GNU General Public License for more details.
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19 You should have received a copy of the GNU General Public License
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20 along with GCC; see the file COPYING3. If not see
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21 <http://www.gnu.org/licenses/>. */
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23 /* This program does not use gensupport.c because it does not need to
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24 look at insn patterns, only (define_constants), and we want to
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25 minimize dependencies. */
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26
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27 #include "bconfig.h"
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28 #include "system.h"
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29 #include "coretypes.h"
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30 #include "errors.h"
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31 #include "statistics.h"
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32 #include "vec.h"
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33 #include "read-md.h"
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35 /* Called via traverse_md_constants; emit a #define for
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36 the current constant definition. */
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37
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38 static int
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39 print_md_constant (void **slot, void *info ATTRIBUTE_UNUSED)
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40 {
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41 struct md_constant *def = (struct md_constant *) *slot;
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43 if (!def->parent_enum)
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44 printf ("#define %s %s\n", def->name, def->value);
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45 return 1;
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46 }
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47
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48 /* Called via traverse_enums. Emit an enum definition for
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49 enum_type *SLOT. */
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51 static int
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52 print_enum_type (void **slot, void *info ATTRIBUTE_UNUSED)
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53 {
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54 struct enum_type *def;
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55 struct enum_value *value;
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56 char *value_name;
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57
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58 def = (struct enum_type *) *slot;
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59 printf ("\nenum %s {", def->name);
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60 for (value = def->values; value; value = value->next)
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61 {
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62 printf ("\n %s = %s", value->def->name, value->def->value);
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63 if (value->next)
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64 putc (',', stdout);
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65 }
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66 printf ("\n};\n");
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67
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68 /* Define NUM_<enum>_VALUES to be the largest enum value + 1. */
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69 value_name = ACONCAT (("num_", def->name, "_values", NULL));
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70 upcase_string (value_name);
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71 printf ("#define %s %d\n", value_name, def->num_values);
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72
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73 /* Declare the array that is generated by genenum. */
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74 printf ("extern const char *const %s_strings[];\n", def->name);
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75
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76 return 1;
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77 }
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78
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79 int
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80 main (int argc, const char **argv)
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81 {
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82 progname = "genconstants";
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83
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84 noop_reader reader;
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85 if (!reader.read_md_files (argc, argv, NULL))
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86 return (FATAL_EXIT_CODE);
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87
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88 /* Initializing the MD reader has the side effect of loading up
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89 the constants table that we wish to scan. */
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90
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91 puts ("/* Generated automatically by the program `genconstants'");
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92 puts (" from the machine description file `md'. */\n");
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93 puts ("#ifndef GCC_INSN_CONSTANTS_H");
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94 puts ("#define GCC_INSN_CONSTANTS_H\n");
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95
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96 reader.traverse_md_constants (print_md_constant, 0);
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97 reader.traverse_enum_types (print_enum_type, 0);
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98
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99 puts ("\n#endif /* GCC_INSN_CONSTANTS_H */");
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100
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101 if (ferror (stdout) || fflush (stdout) || fclose (stdout))
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102 return FATAL_EXIT_CODE;
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103
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104 return SUCCESS_EXIT_CODE;
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105 }