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 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
32enum {
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
45static 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
52static 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
60static const name_map decode_slash_map[] = {
61  { "variable-slash", 0 },
62  { "constant-slash", 1 },
63  { NULL },
64};
65
66
67static decode_gen_type overriding_gen_type = invalid_gen;
68
69void
70force_decode_gen_type(const char *type)
71{
72  overriding_gen_type = name2i(type, decode_gen_map);
73}
74
75
76decode_table *
77load_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
110void
111dump_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
135static void
136dump_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
145int
146main(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
156