1 /* The IGEN simulator generator for GDB, the GNU Debugger.
3 Copyright 2002-2014 Free Software Foundation, Inc.
5 Contributed by Andrew Cagney.
7 This file is part of GDB.
9 This program 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 3 of the License, or
12 (at your option) any later version.
14 This program 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.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* load the opcode stat structure */
32 #include "ld-decode.h"
39 static const name_map decode_type_map
[] = {
40 {"normal", normal_decode_rule
},
41 {"boolean", boolean_rule
},
42 {NULL
, normal_decode_rule
},
45 static const name_map decode_gen_map
[] = {
47 {"switch", switch_gen
},
48 {"padded-switch", padded_switch_gen
},
49 {"goto-switch", goto_switch_gen
},
53 static const name_map decode_reserved_map
[] = {
58 static const name_map decode_duplicates_map
[] = {
63 static const name_map decode_combine_map
[] = {
68 static const name_map decode_search_map
[] = {
69 {"constants", decode_find_constants
},
70 {"mixed", decode_find_mixed
},
71 {"strings", decode_find_strings
},
72 {NULL
, decode_find_mixed
},
77 set_bits (int bit
[max_insn_bit_size
], unsigned64 value
)
80 for (bit_nr
= 0; bit_nr
< max_insn_bit_size
; bit_nr
++)
82 if (bit_nr
< options
.insn_bit_size
)
83 bit
[bit_nr
] = (value
>> (options
.insn_bit_size
- bit_nr
- 1)) & 1;
90 load_decode_table (char *file_name
)
92 table
*file
= table_open (file_name
);
94 decode_table
*table
= NULL
;
95 decode_table
**curr_rule
= &table
;
96 while ((entry
= table_read (file
)) != NULL
)
98 char *decode_options
= entry
->field
[decode_options_field
];
99 decode_table
*new_rule
= ZALLOC (decode_table
);
100 if (entry
->nr_fields
< min_nr_decode_fields
)
101 error (entry
->line
, "Missing decode table fields\n");
102 new_rule
->line
= entry
->line
;
104 /* the options field */
105 new_rule
->type
= name2i (decode_options
, decode_type_map
);
106 if (options
.decode
.overriding_gen
!= NULL
)
108 name2i (options
.decode
.overriding_gen
, decode_gen_map
);
110 new_rule
->gen
= name2i (decode_options
, decode_gen_map
);
111 if (new_rule
->gen
== padded_switch_gen
&& options
.decode
.switch_as_goto
)
112 new_rule
->gen
= goto_switch_gen
;
113 if (options
.decode
.zero_reserved
)
114 new_rule
->with_zero_reserved
= 1;
116 new_rule
->with_zero_reserved
=
117 name2i (decode_options
, decode_reserved_map
);
118 if (options
.decode
.duplicate
)
119 new_rule
->with_duplicates
= 1;
121 new_rule
->with_duplicates
=
122 name2i (decode_options
, decode_duplicates_map
);
123 if (options
.decode
.combine
)
124 new_rule
->with_combine
= 1;
126 new_rule
->with_combine
= name2i (decode_options
, decode_combine_map
);
127 if (new_rule
->type
== boolean_rule
)
129 char *chp
= decode_options
;
134 new_rule
->constant
= a2i (chp
);
137 chp
= skip_to_separator (chp
, ",");
138 chp
= skip_spaces (chp
);
143 if (entry
->nr_fields
> decode_first_field
144 && strlen (entry
->field
[decode_first_field
]) > 0)
146 new_rule
->first
= target_a2i (options
.hi_bit_nr
,
147 entry
->field
[decode_first_field
]);
148 if (new_rule
->first
< 0 || new_rule
->first
>= options
.insn_bit_size
)
149 error (new_rule
->line
, "First field out of range\n");
153 if (entry
->nr_fields
> decode_last_field
154 && strlen (entry
->field
[decode_last_field
]) > 0)
156 new_rule
->last
= target_a2i (options
.hi_bit_nr
,
157 entry
->field
[decode_last_field
]);
158 if (new_rule
->last
< 0 || new_rule
->last
>= options
.insn_bit_size
)
159 error (new_rule
->line
, "Last field out of range\n");
162 new_rule
->last
= options
.insn_bit_size
- 1;
163 if (new_rule
->first
> new_rule
->last
)
164 error (new_rule
->line
, "First must preceed last\n");
166 /* force first/last, with default values based on first/last */
167 if (entry
->nr_fields
> decode_force_first_field
168 && strlen (entry
->field
[decode_force_first_field
]) > 0)
170 new_rule
->force_first
= target_a2i (options
.hi_bit_nr
,
173 [decode_force_first_field
]);
174 if (new_rule
->force_first
< new_rule
->first
175 || new_rule
->force_first
> new_rule
->last
+ 1)
176 error (new_rule
->line
, "Force first out of range\n");
179 new_rule
->force_first
= new_rule
->last
+ 1;
180 if (entry
->nr_fields
> decode_force_last_field
181 && strlen (entry
->field
[decode_force_last_field
]) > 0)
183 new_rule
->force_last
= target_a2i (options
.hi_bit_nr
,
185 field
[decode_force_last_field
]);
186 if (new_rule
->force_last
> new_rule
->last
187 || new_rule
->force_last
< new_rule
->first
- 1)
188 error (new_rule
->line
, "Force-last out of range\n");
191 new_rule
->force_last
= new_rule
->first
- 1;
193 /* fields to be treated as constant */
194 if (entry
->nr_fields
> decode_constant_field_names_field
)
195 filter_parse (&new_rule
->constant_field_names
,
196 entry
->field
[decode_constant_field_names_field
]);
198 /* applicable word nr */
199 if (entry
->nr_fields
> decode_word_nr_field
)
200 new_rule
->word_nr
= a2i (entry
->field
[decode_word_nr_field
]);
202 /* required instruction format names */
203 if (entry
->nr_fields
> decode_format_names_field
)
204 filter_parse (&new_rule
->format_names
,
205 entry
->field
[decode_format_names_field
]);
207 /* required processor models */
208 if (entry
->nr_fields
> decode_model_names_field
)
209 filter_parse (&new_rule
->model_names
,
210 entry
->field
[decode_model_names_field
]);
213 if (entry
->nr_fields
> decode_paths_field
214 && strlen (entry
->field
[decode_paths_field
]) > 0)
216 decode_path_list
**last
= &new_rule
->paths
;
217 char *chp
= entry
->field
[decode_paths_field
];
220 (*last
) = ZALLOC (decode_path_list
);
221 /* extra root/zero entry */
222 (*last
)->path
= ZALLOC (decode_path
);
225 decode_path
*entry
= ZALLOC (decode_path
);
226 entry
->opcode_nr
= a2i (chp
);
227 entry
->parent
= (*last
)->path
;
228 (*last
)->path
= entry
;
229 chp
= skip_digits (chp
);
230 chp
= skip_spaces (chp
);
233 last
= &(*last
)->next
;
237 error (entry
->line
, "Invalid path field\n");
240 /* collect up the list of optional special conditions applicable
243 int field_nr
= nr_decode_fields
;
244 while (entry
->nr_fields
> field_nr
)
246 decode_cond
*cond
= ZALLOC (decode_cond
);
248 if (entry
->nr_fields
> field_nr
+ decode_cond_mask_field
)
249 set_bits (cond
->mask
,
251 field
[field_nr
+ decode_cond_mask_field
]));
252 if (entry
->nr_fields
> field_nr
+ decode_cond_value_field
)
254 if (entry
->field
[field_nr
+ decode_cond_value_field
][0] ==
258 set_bits (cond
->value
,
260 field
[field_nr
+ decode_cond_value_field
] +
266 set_bits (cond
->value
,
269 decode_cond_value_field
]));
272 if (entry
->nr_fields
> field_nr
+ decode_cond_word_nr_field
)
274 a2i (entry
->field
[field_nr
+ decode_cond_word_nr_field
]);
275 field_nr
+= nr_decode_cond_fields
;
277 last
= &new_rule
->conditions
;
278 while (*last
!= NULL
)
279 last
= &(*last
)->next
;
283 *curr_rule
= new_rule
;
284 curr_rule
= &new_rule
->next
;
291 decode_table_max_word_nr (decode_table
*entry
)
294 while (entry
!= NULL
)
297 if (entry
->word_nr
> max_word_nr
)
298 max_word_nr
= entry
->word_nr
;
299 for (cond
= entry
->conditions
; cond
!= NULL
; cond
= cond
->next
)
301 if (cond
->word_nr
> max_word_nr
)
302 max_word_nr
= cond
->word_nr
;
312 dump_decode_cond (lf
*file
, char *prefix
, decode_cond
*cond
, char *suffix
)
314 lf_printf (file
, "%s(decode_cond *) 0x%lx", prefix
, (long) cond
);
317 lf_indent (file
, +1);
318 lf_printf (file
, "\n(word_nr %d)", cond
->word_nr
);
319 lf_printf (file
, "\n(mask 0x%lx)", (long) cond
->mask
);
320 lf_printf (file
, "\n(value 0x%lx)", (long) cond
->value
);
321 lf_printf (file
, "\n(is_equal 0x%lx)", (long) cond
->is_equal
);
322 lf_printf (file
, "\n(next (decode_cond *) 0%lx)", (long) cond
->next
);
323 lf_indent (file
, -1);
325 lf_printf (file
, "%s", suffix
);
330 dump_decode_conds (lf
*file
, char *prefix
, decode_cond
*cond
, char *suffix
)
332 lf_printf (file
, "%s(decode_cond *) 0x%lx", prefix
, (long) cond
);
335 dump_decode_cond (file
, "\n(", cond
, ")");
338 lf_printf (file
, "%s", suffix
);
343 dump_decode_rule (lf
*file
, char *prefix
, decode_table
*rule
, char *suffix
)
345 lf_printf (file
, "%s(decode_table *) 0x%lx", prefix
, (long) rule
);
348 lf_indent (file
, +1);
349 dump_line_ref (file
, "\n(line ", rule
->line
, ")");
350 lf_printf (file
, "\n(type %s)", i2name (rule
->type
, decode_type_map
));
351 lf_printf (file
, "\n(gen %s)", i2name (rule
->gen
, decode_gen_map
));
352 lf_printf (file
, "\n(first %d)", rule
->first
);
353 lf_printf (file
, "\n(last %d)", rule
->last
);
354 lf_printf (file
, "\n(force_first %d)", rule
->force_first
);
355 lf_printf (file
, "\n(force_last %d)", rule
->force_last
);
356 dump_filter (file
, "\n(constant_field_names \"",
357 rule
->constant_field_names
, "\")");
358 lf_printf (file
, "\n(constant 0x%x)", rule
->constant
);
359 lf_printf (file
, "\n(word_nr %d)", rule
->word_nr
);
360 lf_printf (file
, "\n(with_zero_reserved %d)", rule
->with_zero_reserved
);
361 lf_printf (file
, "\n(with_duplicates %d)", rule
->with_duplicates
);
362 lf_printf (file
, "\n(with_combine %d)", rule
->with_combine
);
363 dump_filter (file
, "\n(format_names \"", rule
->format_names
, "\")");
364 dump_filter (file
, "\n(model_names \"", rule
->model_names
, "\")");
365 dump_decode_conds (file
, "\n(conditions ", rule
->conditions
, ")");
366 lf_printf (file
, "\n(next 0x%lx)", (long) rule
->next
);
367 lf_indent (file
, -1);
369 lf_printf (file
, "%s", suffix
);
376 dump_decode_rules (lf
*file
, char *prefix
, decode_table
*rule
, char *suffix
)
378 lf_printf (file
, "%s", prefix
);
381 lf_indent (file
, +1);
382 dump_decode_rule (file
, "\n(", rule
, ")");
383 lf_indent (file
, -1);
386 lf_printf (file
, "%s", suffix
);
389 igen_options options
;
392 main (int argc
, char **argv
)
397 INIT_OPTIONS (options
);
400 error (NULL
, "Usage: decode <decode-file> <hi-bit-nr>\n");
402 options
.hi_bit_nr
= a2i (argv
[2]);
403 rules
= load_decode_table (argv
[1]);
404 l
= lf_open ("-", "stdout", lf_omit_references
, lf_is_text
, "tmp-ld-insn");
405 dump_decode_rules (l
, "(rules ", rules
, ")\n");