sim/igen/ld-decode.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994,1995,1996, 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 2 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, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19     */
  20
  21 /* load the opcode stat structure */
  22
  23 #include "misc.h"
  24 #include "lf.h"
  25 #include "table.h"
  26 #include "ld-decode.h"
  27
  28 #ifndef NULL
  29 #define NULL 0
  30 #endif
  31
  32 enum {
  33   op_options,
  34   op_first,
  35   op_last,
  36   op_force_first,
  37   op_force_last,
  38   op_force_expansion,
  39   op_special_mask,
  40   op_special_value,
  41   op_special_constant,
  42   nr_decode_fields,
  43 };
  44
  45 static const name_map decode_type_map[] = {
  46   { "normal", normal_decode_rule },
  47   { "expand-forced", expand_forced_rule },
  48   { "boolean", boolean_rule },
  49   { NULL, normal_decode_rule },
  50 };
  51
  52 static const name_map decode_gen_map[] = {
  53   { "array", array_gen },
  54   { "switch", switch_gen },
  55   { "padded-switch", padded_switch_gen },
  56   { "goto-switch", goto_switch_gen },
  57   { NULL, -1 },
  58 };
  59
  60 static const name_map decode_slash_map[] = {
  61   { "variable-slash", 0 },
  62   { "constant-slash", 1 },
  63   { NULL },
  64 };
  65
  66
  67 static decode_gen_type overriding_gen_type = invalid_gen;
  68
  69 void
  70 force_decode_gen_type(const char *type)
  71 {
  72   overriding_gen_type = name2i(type, decode_gen_map);
  73 }
  74
  75
  76 decode_table *
  77 load_decode_table(char *file_name,
  78                   int hi_bit_nr)
  79 {
  80   table *file = table_open(file_name, nr_decode_fields, 0);
  81   table_entry *entry;
  82   decode_table *table = NULL;
  83   decode_table **curr_rule = &table;
  84   while ((entry = table_entry_read(file)) != NULL) {
  85     decode_table *new_rule = ZALLOC(decode_table);
  86     new_rule->type = name2i(entry->fields[op_options], decode_type_map);
  87     new_rule->gen = (overriding_gen_type != invalid_gen
  88                      ? overriding_gen_type
  89                      : name2i(entry->fields[op_options], decode_gen_map));
  90     new_rule->force_slash = name2i(entry->fields[op_options], decode_slash_map);
  91     new_rule->first = target_a2i(hi_bit_nr, entry->fields[op_first]);
  92     new_rule->last = target_a2i(hi_bit_nr, entry->fields[op_last]);
  93     new_rule->force_first = (strlen(entry->fields[op_force_first])
  94                              ? target_a2i(hi_bit_nr, entry->fields[op_force_first])
  95                              : new_rule->last + 1);
  96     new_rule->force_last = (strlen(entry->fields[op_force_last])
  97                             ? target_a2i(hi_bit_nr, entry->fields[op_force_last])
  98                             : new_rule->first - 1);
  99     new_rule->force_expansion = entry->fields[op_force_expansion];
 100     new_rule->special_mask = a2i(entry->fields[op_special_mask]);
 101     new_rule->special_value = a2i(entry->fields[op_special_value]);
 102     new_rule->special_constant = a2i(entry->fields[op_special_constant]);
 103     *curr_rule = new_rule;
 104     curr_rule = &new_rule->next;
 105   }
 106   return table;
 107 }
 108
 109
 110 void
 111 dump_decode_rule(decode_table *rule,
 112                  int indent)
 113 {
 114   dumpf(indent, "((decode_table*)%p\n", rule);
 115   if (rule) {
 116     dumpf(indent, " (type %s)\n", i2name(rule->type, decode_type_map));
 117     dumpf(indent, " (gen %s)\n", i2name(rule->gen, decode_gen_map));
 118     dumpf(indent, " (force_slash %d)\n", rule->force_slash);
 119     dumpf(indent, " (first %d)\n", rule->first);
 120     dumpf(indent, " (last %d)\n", rule->last);
 121     dumpf(indent, " (force_first %d)\n", rule->force_first);
 122     dumpf(indent, " (force_last %d)\n", rule->force_last);
 123     dumpf(indent, " (force_expansion \"%s\")\n", rule->force_expansion);
 124     dumpf(indent, " (special_mask 0x%x)\n", rule->special_mask);
 125     dumpf(indent, " (special_value 0x%x)\n", rule->special_value);
 126     dumpf(indent, " (special_constant 0x%x)\n", rule->special_constant);
 127     dumpf(indent, " (next 0x%x)\n", rule->next);
 128   }
 129   dumpf(indent, " )\n");
 130 }
 131
 132
 133 #ifdef MAIN
 134
 135 static void
 136 dump_decode_rules(decode_table *rule,
 137                   int indent)
 138 {
 139   while (rule) {
 140     dump_decode_rule(rule, indent);
 141     rule = rule->next;
 142   }
 143 }
 144
 145 int
 146 main(int argc, char **argv)
 147 {
 148   decode_table *rules;
 149   if (argc != 3)
 150     error("Usage: decode <decode-file> <hi-bit-nr>\n");
 151   rules = load_decode_table(argv[1], a2i(argv[2]));
 152   dump_decode_rules(rules, 0);
 153   return 0;
 154 }
 155 #endif