sim/ppc/ld-decode.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, see <http://www.gnu.org/licenses/>.
  17
  18     */
  19
  20 /* load the opcode stat structure */
  21
  22 #include "misc.h"
  23 #include "lf.h"
  24 #include "table.h"
  25 #include "ld-decode.h"
  26
  27 #ifndef NULL
  28 #define NULL 0
  29 #endif
  30
  31 enum {
  32   op_options,
  33   op_first,
  34   op_last,
  35   op_force_first,
  36   op_force_last,
  37   op_force_expansion,
  38   op_special_mask,
  39   op_special_value,
  40   op_special_constant,
  41   nr_decode_fields,
  42 };
  43
  44 static const name_map decode_type_map[] = {
  45   { "normal", normal_decode_rule },
  46   { "expand-forced", expand_forced_rule },
  47   { "boolean", boolean_rule },
  48   { NULL, normal_decode_rule },
  49 };
  50
  51 static const name_map decode_gen_map[] = {
  52   { "array", array_gen },
  53   { "switch", switch_gen },
  54   { "padded-switch", padded_switch_gen },
  55   { "goto-switch", goto_switch_gen },
  56   { NULL, -1 },
  57 };
  58
  59 static const name_map decode_slash_map[] = {
  60   { "variable-slash", 0 },
  61   { "constant-slash", 1 },
  62   { NULL },
  63 };
  64
  65
  66 static decode_gen_type overriding_gen_type = invalid_gen;
  67
  68 void
  69 force_decode_gen_type(const char *type)
  70 {
  71   overriding_gen_type = name2i(type, decode_gen_map);
  72 }
  73
  74
  75 decode_table *
  76 load_decode_table(char *file_name,
  77                   int hi_bit_nr)
  78 {
  79   table *file = table_open(file_name, nr_decode_fields, 0);
  80   table_entry *entry;
  81   decode_table *table = NULL;
  82   decode_table **curr_rule = &table;
  83   while ((entry = table_entry_read(file)) != NULL) {
  84     decode_table *new_rule = ZALLOC(decode_table);
  85     new_rule->type = name2i(entry->fields[op_options], decode_type_map);
  86     new_rule->gen = (overriding_gen_type != invalid_gen
  87                      ? overriding_gen_type
  88                      : name2i(entry->fields[op_options], decode_gen_map));
  89     new_rule->force_slash = name2i(entry->fields[op_options], decode_slash_map);
  90     new_rule->first = target_a2i(hi_bit_nr, entry->fields[op_first]);
  91     new_rule->last = target_a2i(hi_bit_nr, entry->fields[op_last]);
  92     new_rule->force_first = (strlen(entry->fields[op_force_first])
  93                              ? target_a2i(hi_bit_nr, entry->fields[op_force_first])
  94                              : new_rule->last + 1);
  95     new_rule->force_last = (strlen(entry->fields[op_force_last])
  96                             ? target_a2i(hi_bit_nr, entry->fields[op_force_last])
  97                             : new_rule->first - 1);
  98     new_rule->force_expansion = entry->fields[op_force_expansion];
  99     new_rule->special_mask = a2i(entry->fields[op_special_mask]);
 100     new_rule->special_value = a2i(entry->fields[op_special_value]);
 101     new_rule->special_constant = a2i(entry->fields[op_special_constant]);
 102     *curr_rule = new_rule;
 103     curr_rule = &new_rule->next;
 104   }
 105   return table;
 106 }
 107
 108
 109 void
 110 dump_decode_rule(decode_table *rule,
 111                  int indent)
 112 {
 113   dumpf(indent, "((decode_table*)%p\n", rule);
 114   if (rule) {
 115     dumpf(indent, " (type %s)\n", i2name(rule->type, decode_type_map));
 116     dumpf(indent, " (gen %s)\n", i2name(rule->gen, decode_gen_map));
 117     dumpf(indent, " (force_slash %d)\n", rule->force_slash);
 118     dumpf(indent, " (first %d)\n", rule->first);
 119     dumpf(indent, " (last %d)\n", rule->last);
 120     dumpf(indent, " (force_first %d)\n", rule->force_first);
 121     dumpf(indent, " (force_last %d)\n", rule->force_last);
 122     dumpf(indent, " (force_expansion \"%s\")\n", rule->force_expansion);
 123     dumpf(indent, " (special_mask 0x%x)\n", rule->special_mask);
 124     dumpf(indent, " (special_value 0x%x)\n", rule->special_value);
 125     dumpf(indent, " (special_constant 0x%x)\n", rule->special_constant);
 126     dumpf(indent, " (next 0x%x)\n", rule->next);
 127   }
 128   dumpf(indent, " )\n");
 129 }
 130
 131
 132 #ifdef MAIN
 133
 134 static void
 135 dump_decode_rules(decode_table *rule,
 136                   int indent)
 137 {
 138   while (rule) {
 139     dump_decode_rule(rule, indent);
 140     rule = rule->next;
 141   }
 142 }
 143
 144 int
 145 main(int argc, char **argv)
 146 {
 147   decode_table *rules;
 148   if (argc != 3)
 149     error("Usage: decode <decode-file> <hi-bit-nr>\n");
 150   rules = load_decode_table(argv[1], a2i(argv[2]));
 151   dump_decode_rules(rules, 0);
 152   return 0;
 153 }
 154 #endif