Commit | Line | Data |
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feaee4bd AC |
1 | /* The IGEN simulator generator for GDB, the GNU Debugger. |
2 | ||
e2882c85 | 3 | Copyright 2002-2018 Free Software Foundation, Inc. |
feaee4bd AC |
4 | |
5 | Contributed by Andrew Cagney. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
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 | |
4744ac1b | 11 | the Free Software Foundation; either version 3 of the License, or |
feaee4bd AC |
12 | (at your option) any later version. |
13 | ||
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. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
4744ac1b | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
feaee4bd | 21 | |
c906108c SS |
22 | |
23 | #include "misc.h" | |
24 | #include "lf.h" | |
25 | #include "table.h" | |
26 | #include "filter.h" | |
27 | #include "igen.h" | |
28 | ||
29 | #include "ld-insn.h" | |
30 | #include "ld-decode.h" | |
31 | ||
32 | #include "gen.h" | |
33 | ||
34 | #include "gen-idecode.h" | |
35 | #include "gen-icache.h" | |
36 | #include "gen-semantics.h" | |
37 | ||
38 | ||
39 | ||
40 | static void | |
4e0bf4c4 | 41 | lf_print_opcodes (lf *file, gen_entry *table) |
c906108c | 42 | { |
4e0bf4c4 | 43 | if (table !=NULL) |
c906108c SS |
44 | { |
45 | while (1) | |
46 | { | |
47 | ASSERT (table->opcode != NULL); | |
48 | lf_printf (file, "_%d_%d", | |
4e0bf4c4 AC |
49 | table->opcode->first, table->opcode->last); |
50 | if (table->parent == NULL) | |
51 | break; | |
c906108c SS |
52 | lf_printf (file, "__%d", table->opcode_nr); |
53 | table = table->parent; | |
54 | } | |
55 | } | |
56 | } | |
57 | ||
58 | ||
59 | ||
60 | ||
61 | static void | |
62 | print_idecode_ifetch (lf *file, | |
63 | int previous_nr_prefetched_words, | |
64 | int current_nr_prefetched_words) | |
65 | { | |
66 | int word_nr; | |
67 | for (word_nr = previous_nr_prefetched_words; | |
4e0bf4c4 | 68 | word_nr < current_nr_prefetched_words; word_nr++) |
c906108c | 69 | { |
4e0bf4c4 AC |
70 | lf_printf (file, |
71 | "instruction_word instruction_%d = IMEM%d_IMMED (cia, %d);\n", | |
c906108c | 72 | word_nr, options.insn_bit_size, word_nr); |
4e0bf4c4 | 73 | |
c906108c SS |
74 | } |
75 | } | |
76 | ||
77 | ||
78 | ||
79 | /****************************************************************/ | |
80 | ||
81 | ||
82 | static void | |
4e0bf4c4 | 83 | lf_print_table_name (lf *file, gen_entry *table) |
c906108c SS |
84 | { |
85 | lf_printf (file, "idecode_table"); | |
86 | lf_print_opcodes (file, table); | |
87 | } | |
88 | ||
89 | ||
90 | ||
91 | static void | |
4e0bf4c4 | 92 | print_idecode_table (lf *file, gen_entry *entry, const char *result) |
c906108c SS |
93 | { |
94 | lf_printf (file, "/* prime the search */\n"); | |
95 | lf_printf (file, "idecode_table_entry *table = "); | |
96 | lf_print_table_name (file, entry); | |
97 | lf_printf (file, ";\n"); | |
98 | lf_printf (file, "int opcode = EXTRACTED%d (instruction, %d, %d);\n", | |
99 | options.insn_bit_size, | |
100 | i2target (options.hi_bit_nr, entry->opcode->first), | |
101 | i2target (options.hi_bit_nr, entry->opcode->last)); | |
102 | lf_printf (file, "idecode_table_entry *table_entry = table + opcode;\n"); | |
4e0bf4c4 | 103 | |
c906108c SS |
104 | lf_printf (file, "\n"); |
105 | lf_printf (file, "/* iterate until a leaf */\n"); | |
106 | lf_printf (file, "while (1) {\n"); | |
107 | lf_printf (file, " signed shift = table_entry->shift;\n"); | |
108 | lf_printf (file, "if (shift == function_entry) break;\n"); | |
109 | lf_printf (file, " if (shift >= 0) {\n"); | |
110 | lf_printf (file, " table = ((idecode_table_entry*)\n"); | |
111 | lf_printf (file, " table_entry->function_or_table);\n"); | |
112 | lf_printf (file, " opcode = ((instruction & table_entry->mask)\n"); | |
113 | lf_printf (file, " >> shift);\n"); | |
114 | lf_printf (file, " table_entry = table + opcode;\n"); | |
115 | lf_printf (file, " }\n"); | |
116 | lf_printf (file, " else {\n"); | |
117 | lf_printf (file, " /* must be a boolean */\n"); | |
118 | lf_printf (file, " ASSERT(table_entry->shift == boolean_entry);\n"); | |
119 | lf_printf (file, " opcode = ((instruction & table_entry->mask)\n"); | |
120 | lf_printf (file, " != table_entry->value);\n"); | |
121 | lf_printf (file, " table = ((idecode_table_entry*)\n"); | |
122 | lf_printf (file, " table_entry->function_or_table);\n"); | |
123 | lf_printf (file, " table_entry = table + opcode;\n"); | |
124 | lf_printf (file, " }\n"); | |
125 | lf_printf (file, "}\n"); | |
4e0bf4c4 | 126 | |
c906108c SS |
127 | lf_printf (file, "\n"); |
128 | lf_printf (file, "/* call the leaf code */\n"); | |
129 | if (options.gen.code == generate_jumps) | |
130 | { | |
131 | lf_printf (file, "goto *table_entry->function_or_table;\n"); | |
132 | } | |
133 | else | |
134 | { | |
135 | lf_printf (file, "%s ", result); | |
136 | if (options.gen.icache) | |
137 | { | |
4e0bf4c4 AC |
138 | lf_printf (file, |
139 | "(((idecode_icache*)table_entry->function_or_table)\n"); | |
c906108c SS |
140 | lf_printf (file, " ("); |
141 | print_icache_function_actual (file, 1); | |
142 | lf_printf (file, "));\n"); | |
143 | } | |
144 | else | |
145 | { | |
4e0bf4c4 AC |
146 | lf_printf (file, |
147 | "((idecode_semantic*)table_entry->function_or_table)\n"); | |
c906108c SS |
148 | lf_printf (file, " ("); |
149 | print_semantic_function_actual (file, 1); | |
150 | lf_printf (file, ");\n"); | |
151 | } | |
152 | } | |
153 | } | |
154 | ||
155 | ||
156 | static void | |
4e0bf4c4 | 157 | print_idecode_table_start (lf *file, gen_entry *table, int depth, void *data) |
c906108c SS |
158 | { |
159 | ASSERT (depth == 0); | |
160 | /* start of the table */ | |
161 | if (table->opcode_rule->gen == array_gen) | |
162 | { | |
163 | lf_printf (file, "\n"); | |
164 | lf_printf (file, "static idecode_table_entry "); | |
165 | lf_print_table_name (file, table); | |
166 | lf_printf (file, "[] = {\n"); | |
167 | } | |
168 | } | |
169 | ||
170 | static void | |
4e0bf4c4 | 171 | print_idecode_table_leaf (lf *file, gen_entry *entry, int depth, void *data) |
c906108c SS |
172 | { |
173 | gen_entry *master_entry; | |
174 | ASSERT (entry->parent != NULL); | |
175 | ASSERT (depth == 0); | |
176 | if (entry->combined_parent == NULL) | |
177 | master_entry = entry; | |
178 | else | |
179 | master_entry = entry->combined_parent; | |
180 | ||
181 | /* add an entry to the table */ | |
182 | if (entry->parent->opcode_rule->gen == array_gen) | |
183 | { | |
184 | lf_printf (file, " /*%d*/ { ", entry->opcode_nr); | |
185 | if (entry->opcode == NULL) | |
186 | { | |
187 | ASSERT (entry->nr_insns == 1); | |
188 | /* table leaf entry */ | |
189 | lf_printf (file, "function_entry, 0, 0, "); | |
190 | if (options.gen.code == generate_jumps) | |
191 | { | |
192 | lf_printf (file, "&&"); | |
193 | } | |
194 | print_function_name (file, | |
195 | entry->insns->insn->name, | |
196 | entry->insns->insn->format_name, | |
197 | NULL, | |
198 | master_entry->expanded_bits, | |
199 | (options.gen.icache | |
200 | ? function_name_prefix_icache | |
201 | : function_name_prefix_semantics)); | |
202 | } | |
203 | else if (entry->opcode_rule->gen == switch_gen | |
204 | || entry->opcode_rule->gen == goto_switch_gen | |
205 | || entry->opcode_rule->gen == padded_switch_gen) | |
206 | { | |
207 | /* table calling switch statement */ | |
208 | lf_printf (file, "function_entry, 0, 0, "); | |
209 | if (options.gen.code == generate_jumps) | |
210 | { | |
211 | lf_printf (file, "&&"); | |
212 | } | |
213 | lf_print_table_name (file, entry); | |
214 | } | |
215 | else if (entry->opcode->is_boolean) | |
216 | { | |
217 | /* table `calling' boolean table */ | |
218 | lf_printf (file, "boolean_entry, "); | |
219 | lf_printf (file, "MASK32(%d, %d), ", | |
220 | i2target (options.hi_bit_nr, entry->opcode->first), | |
221 | i2target (options.hi_bit_nr, entry->opcode->last)); | |
222 | lf_printf (file, "INSERTED32(%d, %d, %d), ", | |
223 | entry->opcode->boolean_constant, | |
224 | i2target (options.hi_bit_nr, entry->opcode->first), | |
225 | i2target (options.hi_bit_nr, entry->opcode->last)); | |
226 | lf_print_table_name (file, entry); | |
227 | } | |
228 | else | |
229 | { | |
230 | /* table `calling' another table */ | |
4e0bf4c4 AC |
231 | lf_printf (file, "%d, ", |
232 | options.insn_bit_size - entry->opcode->last - 1); | |
233 | lf_printf (file, "MASK%d(%d,%d), ", options.insn_bit_size, | |
c906108c SS |
234 | i2target (options.hi_bit_nr, entry->opcode->first), |
235 | i2target (options.hi_bit_nr, entry->opcode->last)); | |
236 | lf_printf (file, "0, "); | |
237 | lf_print_table_name (file, entry); | |
238 | } | |
239 | lf_printf (file, " },\n"); | |
240 | } | |
241 | } | |
242 | ||
243 | static void | |
4e0bf4c4 | 244 | print_idecode_table_end (lf *file, gen_entry *table, int depth, void *data) |
c906108c SS |
245 | { |
246 | ASSERT (depth == 0); | |
4e0bf4c4 AC |
247 | if (table->opcode_rule->gen == array_gen) |
248 | { | |
249 | lf_printf (file, "};\n"); | |
250 | } | |
c906108c SS |
251 | } |
252 | ||
253 | /****************************************************************/ | |
254 | ||
255 | ||
256 | static void | |
4e0bf4c4 | 257 | print_goto_switch_name (lf *file, gen_entry *entry) |
c906108c SS |
258 | { |
259 | lf_printf (file, "case_"); | |
260 | if (entry->opcode == NULL) | |
261 | { | |
262 | print_function_name (file, | |
263 | entry->insns->insn->name, | |
264 | entry->insns->insn->format_name, | |
265 | NULL, | |
266 | entry->expanded_bits, | |
267 | (options.gen.icache | |
268 | ? function_name_prefix_icache | |
269 | : function_name_prefix_semantics)); | |
270 | } | |
271 | else | |
272 | { | |
4e0bf4c4 | 273 | lf_print_table_name (file, entry); |
c906108c SS |
274 | } |
275 | } | |
276 | ||
277 | static void | |
278 | print_goto_switch_table_leaf (lf *file, | |
4e0bf4c4 | 279 | gen_entry *entry, int depth, void *data) |
c906108c SS |
280 | { |
281 | ASSERT (entry->parent != NULL); | |
282 | ASSERT (depth == 0); | |
283 | ASSERT (entry->parent->opcode_rule->gen == goto_switch_gen); | |
284 | ASSERT (entry->parent->opcode); | |
4e0bf4c4 | 285 | |
c906108c SS |
286 | lf_printf (file, "/* %d */ &&", entry->opcode_nr); |
287 | if (entry->combined_parent != NULL) | |
288 | print_goto_switch_name (file, entry->combined_parent); | |
289 | else | |
290 | print_goto_switch_name (file, entry); | |
291 | lf_printf (file, ",\n"); | |
292 | } | |
293 | ||
294 | static void | |
4e0bf4c4 | 295 | print_goto_switch_break (lf *file, gen_entry *entry) |
c906108c SS |
296 | { |
297 | lf_printf (file, "goto break_"); | |
298 | lf_print_table_name (file, entry->parent); | |
299 | lf_printf (file, ";\n"); | |
300 | } | |
301 | ||
302 | ||
303 | static void | |
4e0bf4c4 | 304 | print_goto_switch_table (lf *file, gen_entry *table) |
c906108c SS |
305 | { |
306 | lf_printf (file, "const static void *"); | |
307 | lf_print_table_name (file, table); | |
308 | lf_printf (file, "[] = {\n"); | |
309 | lf_indent (file, +2); | |
4e0bf4c4 AC |
310 | gen_entry_traverse_tree (file, table, 0, NULL /*start */ , |
311 | print_goto_switch_table_leaf, NULL /*end */ , | |
312 | NULL /*data */ ); | |
c906108c SS |
313 | lf_indent (file, -2); |
314 | lf_printf (file, "};\n"); | |
315 | } | |
316 | ||
317 | ||
4e0bf4c4 | 318 | void print_idecode_switch (lf *file, gen_entry *table, const char *result); |
c906108c SS |
319 | |
320 | static void | |
4e0bf4c4 | 321 | print_idecode_switch_start (lf *file, gen_entry *table, int depth, void *data) |
c906108c SS |
322 | { |
323 | /* const char *result = data; */ | |
324 | ASSERT (depth == 0); | |
325 | ASSERT (table->opcode_rule->gen == switch_gen | |
326 | || table->opcode_rule->gen == goto_switch_gen | |
327 | || table->opcode_rule->gen == padded_switch_gen); | |
4e0bf4c4 | 328 | |
c906108c SS |
329 | if (table->opcode->is_boolean |
330 | || table->opcode_rule->gen == switch_gen | |
331 | || table->opcode_rule->gen == padded_switch_gen) | |
332 | { | |
333 | lf_printf (file, "switch (EXTRACTED%d (instruction_%d, %d, %d))\n", | |
334 | options.insn_bit_size, | |
335 | table->opcode_rule->word_nr, | |
336 | i2target (options.hi_bit_nr, table->opcode->first), | |
337 | i2target (options.hi_bit_nr, table->opcode->last)); | |
338 | lf_indent (file, +2); | |
339 | lf_printf (file, "{\n"); | |
340 | } | |
341 | else if (table->opcode_rule->gen == goto_switch_gen) | |
342 | { | |
343 | if (table->parent != NULL | |
344 | && (table->parent->opcode_rule->gen == switch_gen | |
345 | || table->parent->opcode_rule->gen == goto_switch_gen | |
346 | || table->parent->opcode_rule->gen == padded_switch_gen)) | |
347 | { | |
348 | lf_printf (file, "{\n"); | |
349 | lf_indent (file, +2); | |
350 | } | |
351 | print_goto_switch_table (file, table); | |
352 | lf_printf (file, "ASSERT (EXTRACTED%d (instruction_%d, %d, %d)\n", | |
353 | options.insn_bit_size, | |
354 | table->opcode->word_nr, | |
355 | i2target (options.hi_bit_nr, table->opcode->first), | |
356 | i2target (options.hi_bit_nr, table->opcode->last)); | |
357 | lf_printf (file, " < (sizeof ("); | |
358 | lf_print_table_name (file, table); | |
359 | lf_printf (file, ") / sizeof(void*)));\n"); | |
360 | lf_printf (file, "goto *"); | |
361 | lf_print_table_name (file, table); | |
362 | lf_printf (file, "[EXTRACTED%d (instruction_%d, %d, %d)];\n", | |
363 | options.insn_bit_size, | |
364 | table->opcode->word_nr, | |
365 | i2target (options.hi_bit_nr, table->opcode->first), | |
366 | i2target (options.hi_bit_nr, table->opcode->last)); | |
367 | } | |
368 | else | |
369 | { | |
4e0bf4c4 | 370 | ASSERT ("bad switch" == NULL); |
c906108c SS |
371 | } |
372 | } | |
373 | ||
374 | ||
375 | static void | |
4e0bf4c4 | 376 | print_idecode_switch_leaf (lf *file, gen_entry *entry, int depth, void *data) |
c906108c SS |
377 | { |
378 | const char *result = data; | |
379 | ASSERT (entry->parent != NULL); | |
380 | ASSERT (depth == 0); | |
381 | ASSERT (entry->parent->opcode_rule->gen == switch_gen | |
382 | || entry->parent->opcode_rule->gen == goto_switch_gen | |
383 | || entry->parent->opcode_rule->gen == padded_switch_gen); | |
384 | ASSERT (entry->parent->opcode); | |
4e0bf4c4 | 385 | |
c906108c SS |
386 | /* skip over any instructions combined into another entry */ |
387 | if (entry->combined_parent != NULL) | |
388 | return; | |
389 | ||
4e0bf4c4 | 390 | if (entry->parent->opcode->is_boolean && entry->opcode_nr == 0) |
c906108c SS |
391 | { |
392 | /* case: boolean false target */ | |
393 | lf_printf (file, "case %d:\n", entry->parent->opcode->boolean_constant); | |
394 | } | |
4e0bf4c4 | 395 | else if (entry->parent->opcode->is_boolean && entry->opcode_nr != 0) |
c906108c SS |
396 | { |
397 | /* case: boolean true case */ | |
398 | lf_printf (file, "default:\n"); | |
399 | } | |
400 | else if (entry->parent->opcode_rule->gen == switch_gen | |
401 | || entry->parent->opcode_rule->gen == padded_switch_gen) | |
402 | { | |
403 | /* case: <opcode-nr> - switch */ | |
404 | gen_entry *cob; | |
405 | for (cob = entry; cob != NULL; cob = cob->combined_next) | |
406 | lf_printf (file, "case %d:\n", cob->opcode_nr); | |
407 | } | |
408 | else if (entry->parent->opcode_rule->gen == goto_switch_gen) | |
409 | { | |
410 | /* case: <opcode-nr> - goto-switch */ | |
411 | print_goto_switch_name (file, entry); | |
412 | lf_printf (file, ":\n"); | |
413 | } | |
414 | else | |
415 | { | |
416 | ERROR ("bad switch"); | |
417 | } | |
418 | lf_printf (file, " {\n"); | |
419 | lf_indent (file, +4); | |
420 | { | |
421 | if (entry->opcode == NULL) | |
422 | { | |
423 | /* switch calling leaf */ | |
424 | ASSERT (entry->nr_insns == 1); | |
425 | print_idecode_ifetch (file, entry->nr_prefetched_words, | |
426 | entry->insns->semantic->nr_prefetched_words); | |
427 | switch (options.gen.code) | |
428 | { | |
429 | case generate_jumps: | |
430 | lf_printf (file, "goto "); | |
431 | break; | |
432 | case generate_calls: | |
433 | lf_printf (file, "%s", result); | |
434 | break; | |
435 | } | |
436 | print_function_name (file, | |
437 | entry->insns->insn->name, | |
438 | entry->insns->insn->format_name, | |
439 | NULL, | |
440 | entry->expanded_bits, | |
441 | (options.gen.icache | |
442 | ? function_name_prefix_icache | |
443 | : function_name_prefix_semantics)); | |
444 | if (options.gen.code == generate_calls) | |
445 | { | |
446 | lf_printf (file, " ("); | |
4e0bf4c4 AC |
447 | print_semantic_function_actual (file, |
448 | entry->insns->semantic-> | |
449 | nr_prefetched_words); | |
c906108c SS |
450 | lf_printf (file, ")"); |
451 | } | |
452 | lf_printf (file, ";\n"); | |
453 | } | |
454 | else if (entry->opcode_rule->gen == switch_gen | |
455 | || entry->opcode_rule->gen == goto_switch_gen | |
456 | || entry->opcode_rule->gen == padded_switch_gen) | |
457 | { | |
458 | /* switch calling switch */ | |
459 | lf_printf (file, "{\n"); | |
460 | lf_indent (file, +2); | |
461 | print_idecode_ifetch (file, entry->parent->nr_prefetched_words, | |
462 | entry->nr_prefetched_words); | |
463 | print_idecode_switch (file, entry, result); | |
464 | lf_indent (file, -2); | |
465 | lf_printf (file, "}\n"); | |
466 | } | |
467 | else | |
468 | { | |
469 | /* switch looking up a table */ | |
470 | lf_printf (file, "{\n"); | |
471 | lf_indent (file, +2); | |
472 | print_idecode_ifetch (file, entry->parent->nr_prefetched_words, | |
473 | entry->nr_prefetched_words); | |
474 | print_idecode_table (file, entry, result); | |
475 | lf_indent (file, -2); | |
476 | lf_printf (file, "}\n"); | |
477 | } | |
478 | if (entry->parent->opcode->is_boolean | |
479 | || entry->parent->opcode_rule->gen == switch_gen | |
480 | || entry->parent->opcode_rule->gen == padded_switch_gen) | |
481 | { | |
482 | lf_printf (file, "break;\n"); | |
483 | } | |
484 | else if (entry->parent->opcode_rule->gen == goto_switch_gen) | |
485 | { | |
4e0bf4c4 | 486 | print_goto_switch_break (file, entry); |
c906108c SS |
487 | } |
488 | else | |
489 | { | |
490 | ERROR ("bad switch"); | |
491 | } | |
492 | } | |
493 | lf_indent (file, -4); | |
494 | lf_printf (file, " }\n"); | |
495 | } | |
496 | ||
497 | ||
498 | static void | |
4e0bf4c4 | 499 | print_idecode_switch_illegal (lf *file, const char *result) |
c906108c SS |
500 | { |
501 | lf_indent (file, +2); | |
502 | print_idecode_invalid (file, result, invalid_illegal); | |
503 | lf_printf (file, "break;\n"); | |
504 | lf_indent (file, -2); | |
505 | } | |
506 | ||
507 | static void | |
4e0bf4c4 | 508 | print_idecode_switch_end (lf *file, gen_entry *table, int depth, void *data) |
c906108c SS |
509 | { |
510 | const char *result = data; | |
511 | ASSERT (depth == 0); | |
512 | ASSERT (table->opcode_rule->gen == switch_gen | |
513 | || table->opcode_rule->gen == goto_switch_gen | |
514 | || table->opcode_rule->gen == padded_switch_gen); | |
515 | ASSERT (table->opcode); | |
4e0bf4c4 | 516 | |
c906108c SS |
517 | if (table->opcode->is_boolean) |
518 | { | |
519 | lf_printf (file, "}\n"); | |
520 | lf_indent (file, -2); | |
521 | } | |
522 | else if (table->opcode_rule->gen == switch_gen | |
523 | || table->opcode_rule->gen == padded_switch_gen) | |
524 | { | |
525 | lf_printf (file, "default:\n"); | |
526 | lf_indent (file, +2); | |
527 | if (table->nr_entries == table->opcode->nr_opcodes) | |
528 | { | |
4e0bf4c4 AC |
529 | print_sim_engine_abort (file, |
530 | "Internal error - bad switch generated"); | |
c906108c SS |
531 | lf_printf (file, "%sNULL_CIA;\n", result); |
532 | lf_printf (file, "break;\n"); | |
533 | } | |
534 | else | |
535 | { | |
536 | print_idecode_switch_illegal (file, result); | |
537 | } | |
538 | lf_indent (file, -2); | |
539 | lf_printf (file, "}\n"); | |
540 | lf_indent (file, -2); | |
541 | } | |
542 | else if (table->opcode_rule->gen == goto_switch_gen) | |
543 | { | |
544 | lf_printf (file, "illegal_"); | |
545 | lf_print_table_name (file, table); | |
546 | lf_printf (file, ":\n"); | |
547 | print_idecode_invalid (file, result, invalid_illegal); | |
548 | lf_printf (file, "break_"); | |
4e0bf4c4 | 549 | lf_print_table_name (file, table); |
c906108c SS |
550 | lf_printf (file, ":;\n"); |
551 | if (table->parent != NULL | |
552 | && (table->parent->opcode_rule->gen == switch_gen | |
553 | || table->parent->opcode_rule->gen == goto_switch_gen | |
554 | || table->parent->opcode_rule->gen == padded_switch_gen)) | |
555 | { | |
556 | lf_indent (file, -2); | |
557 | lf_printf (file, "}\n"); | |
558 | } | |
559 | } | |
560 | else | |
561 | { | |
562 | ERROR ("bad switch"); | |
563 | } | |
564 | } | |
565 | ||
566 | ||
567 | void | |
4e0bf4c4 | 568 | print_idecode_switch (lf *file, gen_entry *table, const char *result) |
c906108c SS |
569 | { |
570 | gen_entry_traverse_tree (file, table, | |
571 | 0, | |
572 | print_idecode_switch_start, | |
573 | print_idecode_switch_leaf, | |
4e0bf4c4 | 574 | print_idecode_switch_end, (void *) result); |
c906108c SS |
575 | } |
576 | ||
577 | ||
578 | static void | |
579 | print_idecode_switch_function_header (lf *file, | |
580 | gen_entry *table, | |
581 | int is_function_definition, | |
582 | int nr_prefetched_words) | |
583 | { | |
584 | lf_printf (file, "\n"); | |
585 | if (options.gen.code == generate_calls) | |
586 | { | |
587 | lf_printf (file, "static "); | |
588 | if (options.gen.icache) | |
589 | { | |
590 | lf_printf (file, "idecode_semantic *"); | |
591 | } | |
592 | else | |
593 | { | |
594 | lf_printf (file, "unsigned_word"); | |
595 | } | |
596 | if (is_function_definition) | |
597 | { | |
598 | lf_printf (file, "\n"); | |
599 | } | |
600 | else | |
601 | { | |
602 | lf_printf (file, " "); | |
603 | } | |
604 | lf_print_table_name (file, table); | |
605 | lf_printf (file, "\n("); | |
606 | print_icache_function_formal (file, nr_prefetched_words); | |
607 | lf_printf (file, ")"); | |
608 | if (!is_function_definition) | |
609 | { | |
610 | lf_printf (file, ";"); | |
611 | } | |
612 | lf_printf (file, "\n"); | |
613 | } | |
614 | if (options.gen.code == generate_jumps && is_function_definition) | |
615 | { | |
616 | lf_indent (file, -1); | |
617 | lf_print_table_name (file, table); | |
618 | lf_printf (file, ":\n"); | |
619 | lf_indent (file, +1); | |
620 | } | |
621 | } | |
622 | ||
623 | ||
624 | static void | |
4e0bf4c4 | 625 | idecode_declare_if_switch (lf *file, gen_entry *table, int depth, void *data) |
c906108c | 626 | { |
4e0bf4c4 | 627 | if ((table->opcode_rule->gen == switch_gen || table->opcode_rule->gen == goto_switch_gen || table->opcode_rule->gen == padded_switch_gen) &&table->parent != NULL /* don't declare the top one yet */ |
c906108c SS |
628 | && table->parent->opcode_rule->gen == array_gen) |
629 | { | |
630 | print_idecode_switch_function_header (file, | |
631 | table, | |
4e0bf4c4 | 632 | 0 /*isnt function definition */ , |
c906108c SS |
633 | 0); |
634 | } | |
635 | } | |
636 | ||
637 | ||
638 | static void | |
4e0bf4c4 | 639 | idecode_expand_if_switch (lf *file, gen_entry *table, int depth, void *data) |
c906108c | 640 | { |
4e0bf4c4 | 641 | if ((table->opcode_rule->gen == switch_gen || table->opcode_rule->gen == goto_switch_gen || table->opcode_rule->gen == padded_switch_gen) &&table->parent != NULL /* don't expand the top one yet */ |
c906108c SS |
642 | && table->parent->opcode_rule->gen == array_gen) |
643 | { | |
4e0bf4c4 AC |
644 | print_idecode_switch_function_header (file, |
645 | table, | |
646 | 1 /*is function definition */ , | |
647 | 0); | |
c906108c SS |
648 | if (options.gen.code == generate_calls) |
649 | { | |
650 | lf_printf (file, "{\n"); | |
651 | lf_indent (file, +2); | |
652 | } | |
4e0bf4c4 | 653 | print_idecode_switch (file, table, "return"); |
c906108c SS |
654 | if (options.gen.code == generate_calls) |
655 | { | |
656 | lf_indent (file, -2); | |
657 | lf_printf (file, "}\n"); | |
658 | } | |
659 | } | |
660 | } | |
661 | ||
662 | ||
663 | /****************************************************************/ | |
664 | ||
665 | ||
666 | void | |
4e0bf4c4 | 667 | print_idecode_lookups (lf *file, gen_entry *table, cache_entry *cache_rules) |
c906108c SS |
668 | { |
669 | int depth; | |
4e0bf4c4 | 670 | |
c906108c | 671 | /* output switch function declarations where needed by tables */ |
4e0bf4c4 AC |
672 | gen_entry_traverse_tree (file, table, 1, idecode_declare_if_switch, /* START */ |
673 | NULL, NULL, NULL); | |
674 | ||
c906108c | 675 | /* output tables where needed */ |
4e0bf4c4 | 676 | for (depth = gen_entry_depth (table); depth > 0; depth--) |
c906108c SS |
677 | { |
678 | gen_entry_traverse_tree (file, table, | |
4e0bf4c4 | 679 | 1 - depth, |
c906108c SS |
680 | print_idecode_table_start, |
681 | print_idecode_table_leaf, | |
4e0bf4c4 | 682 | print_idecode_table_end, NULL); |
c906108c | 683 | } |
4e0bf4c4 | 684 | |
c906108c | 685 | /* output switch functions where needed */ |
4e0bf4c4 AC |
686 | gen_entry_traverse_tree (file, table, 1, idecode_expand_if_switch, /* START */ |
687 | NULL, NULL, NULL); | |
c906108c SS |
688 | } |
689 | ||
690 | ||
691 | void | |
4e0bf4c4 | 692 | print_idecode_body (lf *file, gen_entry *table, const char *result) |
c906108c SS |
693 | { |
694 | if (table->opcode_rule->gen == switch_gen | |
695 | || table->opcode_rule->gen == goto_switch_gen | |
696 | || table->opcode_rule->gen == padded_switch_gen) | |
697 | { | |
698 | print_idecode_switch (file, table, result); | |
699 | } | |
700 | else | |
701 | { | |
702 | print_idecode_table (file, table, result); | |
703 | } | |
704 | } | |
705 | ||
706 | ||
707 | /****************************************************************/ | |
708 | ||
c906108c SS |
709 | /* Output code to do any final checks on the decoded instruction. |
710 | This includes things like verifying any on decoded fields have the | |
711 | correct value and checking that (for floating point) floating point | |
712 | hardware isn't disabled */ | |
713 | ||
714 | void | |
715 | print_idecode_validate (lf *file, | |
4e0bf4c4 | 716 | insn_entry * instruction, insn_opcodes *opcode_paths) |
c906108c SS |
717 | { |
718 | /* Validate: unchecked instruction fields | |
719 | ||
720 | If any constant fields in the instruction were not checked by the | |
721 | idecode tables, output code to check that they have the correct | |
722 | value here */ | |
723 | { | |
724 | int nr_checks = 0; | |
725 | int word_nr; | |
726 | lf_printf (file, "\n"); | |
727 | lf_indent_suppress (file); | |
728 | lf_printf (file, "#if defined (WITH_RESERVED_BITS)\n"); | |
729 | lf_printf (file, "/* validate: "); | |
730 | print_insn_words (file, instruction); | |
731 | lf_printf (file, " */\n"); | |
732 | for (word_nr = 0; word_nr < instruction->nr_words; word_nr++) | |
733 | { | |
734 | insn_uint check_mask = 0; | |
735 | insn_uint check_val = 0; | |
736 | insn_word_entry *word = instruction->word[word_nr]; | |
737 | int bit_nr; | |
738 | ||
739 | /* form check_mask/check_val containing what needs to be checked | |
740 | in the instruction */ | |
741 | for (bit_nr = 0; bit_nr < options.insn_bit_size; bit_nr++) | |
742 | { | |
743 | insn_bit_entry *bit = word->bit[bit_nr]; | |
744 | insn_field_entry *field = bit->field; | |
745 | ||
746 | /* Make space for the next bit */ | |
747 | check_mask <<= 1; | |
748 | check_val <<= 1; | |
4e0bf4c4 | 749 | |
c906108c | 750 | /* Only need to validate constant (and reserved) |
4e0bf4c4 | 751 | bits. Skip any others */ |
c906108c | 752 | if (field->type != insn_field_int |
af342558 HPN |
753 | && field->type != insn_field_reserved |
754 | /* Consider a named field equal to a value to be just as | |
755 | constant as an integer field. */ | |
756 | && (field->type != insn_field_string | |
757 | || field->conditions == NULL | |
758 | || field->conditions->test != insn_field_cond_eq | |
759 | || field->conditions->type != insn_field_cond_value)) | |
c906108c SS |
760 | continue; |
761 | ||
762 | /* Look through the list of opcode paths that lead to this | |
4e0bf4c4 AC |
763 | instruction. See if any have failed to check the |
764 | relevant bit */ | |
c906108c SS |
765 | if (opcode_paths != NULL) |
766 | { | |
767 | insn_opcodes *entry; | |
4e0bf4c4 | 768 | for (entry = opcode_paths; entry != NULL; entry = entry->next) |
c906108c SS |
769 | { |
770 | opcode_field *opcode; | |
771 | for (opcode = entry->opcode; | |
4e0bf4c4 | 772 | opcode != NULL; opcode = opcode->parent) |
c906108c SS |
773 | { |
774 | if (opcode->word_nr == word_nr | |
775 | && opcode->first <= bit_nr | |
776 | && opcode->last >= bit_nr) | |
777 | /* we've decoded on this bit */ | |
778 | break; | |
779 | } | |
780 | if (opcode == NULL) | |
781 | /* the bit wasn't decoded on */ | |
782 | break; | |
783 | } | |
784 | if (entry == NULL) | |
785 | /* all the opcode paths decoded on BIT_NR, no need | |
4e0bf4c4 | 786 | to check it */ |
c906108c SS |
787 | continue; |
788 | } | |
4e0bf4c4 | 789 | |
c906108c SS |
790 | check_mask |= 1; |
791 | check_val |= bit->value; | |
792 | } | |
4e0bf4c4 | 793 | |
c906108c SS |
794 | /* if any bits not checked by opcode tables, output code to check them */ |
795 | if (check_mask) | |
796 | { | |
797 | if (nr_checks == 0) | |
798 | { | |
799 | lf_printf (file, "if (WITH_RESERVED_BITS)\n"); | |
800 | lf_printf (file, " {\n"); | |
801 | lf_indent (file, +4); | |
802 | } | |
4e0bf4c4 | 803 | nr_checks++; |
c906108c SS |
804 | if (options.insn_bit_size > 32) |
805 | { | |
4e0bf4c4 | 806 | lf_printf (file, "if ((instruction_%d\n", word_nr); |
c906108c | 807 | lf_printf (file, " & UNSIGNED64 (0x%08lx%08lx))\n", |
4e0bf4c4 AC |
808 | (unsigned long) (check_mask >> 32), |
809 | (unsigned long) (check_mask)); | |
c906108c | 810 | lf_printf (file, " != UNSIGNED64 (0x%08lx%08lx))\n", |
4e0bf4c4 AC |
811 | (unsigned long) (check_val >> 32), |
812 | (unsigned long) (check_val)); | |
c906108c SS |
813 | } |
814 | else | |
815 | { | |
4e0bf4c4 AC |
816 | lf_printf (file, |
817 | "if ((instruction_%d & 0x%08lx) != 0x%08lx)\n", | |
818 | word_nr, (unsigned long) (check_mask), | |
819 | (unsigned long) (check_val)); | |
c906108c SS |
820 | } |
821 | lf_indent (file, +2); | |
822 | print_idecode_invalid (file, "return", invalid_illegal); | |
823 | lf_indent (file, -2); | |
824 | } | |
825 | } | |
826 | if (nr_checks > 0) | |
827 | { | |
828 | lf_indent (file, -4); | |
829 | lf_printf (file, " }\n"); | |
830 | } | |
4e0bf4c4 | 831 | lf_indent_suppress (file); |
c906108c SS |
832 | lf_printf (file, "#endif\n"); |
833 | } | |
834 | ||
835 | /* Validate: Floating Point hardware | |
4e0bf4c4 | 836 | |
c906108c SS |
837 | If the simulator is being built with out floating point hardware |
838 | (different to it being disabled in the MSR) then floating point | |
839 | instructions are invalid */ | |
840 | { | |
841 | if (filter_is_member (instruction->flags, "f")) | |
842 | { | |
843 | lf_printf (file, "\n"); | |
844 | lf_indent_suppress (file); | |
845 | lf_printf (file, "#if defined(CURRENT_FLOATING_POINT)\n"); | |
846 | lf_printf (file, "/* Validate: FP hardware exists */\n"); | |
4e0bf4c4 AC |
847 | lf_printf (file, |
848 | "if (CURRENT_FLOATING_POINT != HARD_FLOATING_POINT) {\n"); | |
c906108c SS |
849 | lf_indent (file, +2); |
850 | print_idecode_invalid (file, "return", invalid_illegal); | |
851 | lf_indent (file, -2); | |
852 | lf_printf (file, "}\n"); | |
853 | lf_indent_suppress (file); | |
854 | lf_printf (file, "#endif\n"); | |
855 | } | |
856 | } | |
857 | ||
858 | /* Validate: Floating Point available | |
859 | ||
860 | If floating point is not available, we enter a floating point | |
861 | unavailable interrupt into the cache instead of the instruction | |
862 | proper. | |
863 | ||
864 | The PowerPC spec requires a CSI after MSR[FP] is changed and when | |
865 | ever a CSI occures we flush the instruction cache. */ | |
866 | ||
867 | { | |
868 | if (filter_is_member (instruction->flags, "f")) | |
869 | { | |
870 | lf_printf (file, "\n"); | |
871 | lf_indent_suppress (file); | |
872 | lf_printf (file, "#if defined(IS_FP_AVAILABLE)\n"); | |
873 | lf_printf (file, "/* Validate: FP available according to cpu */\n"); | |
874 | lf_printf (file, "if (!IS_FP_AVAILABLE) {\n"); | |
875 | lf_indent (file, +2); | |
4e0bf4c4 | 876 | print_idecode_invalid (file, "return", invalid_fp_unavailable); |
c906108c SS |
877 | lf_indent (file, -2); |
878 | lf_printf (file, "}\n"); | |
879 | lf_indent_suppress (file); | |
880 | lf_printf (file, "#endif\n"); | |
881 | } | |
882 | } | |
4e0bf4c4 | 883 | |
c906108c SS |
884 | /* Validate: Validate Instruction in correct slot |
885 | ||
886 | Some architectures place restrictions on the slot that an | |
887 | instruction can be issued in */ | |
888 | ||
889 | { | |
890 | if (filter_is_member (instruction->options, "s") | |
891 | || options.gen.slot_verification) | |
892 | { | |
893 | lf_printf (file, "\n"); | |
894 | lf_indent_suppress (file); | |
895 | lf_printf (file, "#if defined(IS_WRONG_SLOT)\n"); | |
4e0bf4c4 AC |
896 | lf_printf (file, |
897 | "/* Validate: Instruction issued in correct slot */\n"); | |
c906108c SS |
898 | lf_printf (file, "if (IS_WRONG_SLOT) {\n"); |
899 | lf_indent (file, +2); | |
900 | print_idecode_invalid (file, "return", invalid_wrong_slot); | |
901 | lf_indent (file, -2); | |
902 | lf_printf (file, "}\n"); | |
903 | lf_indent_suppress (file); | |
904 | lf_printf (file, "#endif\n"); | |
905 | } | |
906 | } | |
4e0bf4c4 | 907 | |
c906108c SS |
908 | } |
909 | ||
910 | ||
911 | /****************************************************************/ | |
912 | ||
913 | ||
914 | void | |
915 | print_idecode_issue_function_header (lf *file, | |
916 | const char *processor, | |
917 | function_decl_type decl_type, | |
918 | int nr_prefetched_words) | |
919 | { | |
920 | int indent; | |
921 | lf_printf (file, "\n"); | |
922 | switch (decl_type) | |
923 | { | |
924 | case is_function_declaration: | |
925 | lf_print__function_type_function (file, print_semantic_function_type, | |
4e0bf4c4 | 926 | "INLINE_IDECODE", " "); |
c906108c SS |
927 | break; |
928 | case is_function_definition: | |
929 | lf_print__function_type_function (file, print_semantic_function_type, | |
4e0bf4c4 | 930 | "INLINE_IDECODE", "\n"); |
c906108c SS |
931 | break; |
932 | case is_function_variable: | |
933 | print_semantic_function_type (file); | |
934 | lf_printf (file, " (*"); | |
935 | break; | |
936 | } | |
937 | indent = print_function_name (file, | |
938 | "issue", | |
939 | NULL, | |
940 | processor, | |
4e0bf4c4 | 941 | NULL, function_name_prefix_idecode); |
c906108c SS |
942 | switch (decl_type) |
943 | { | |
944 | case is_function_definition: | |
945 | indent += lf_printf (file, " ("); | |
946 | break; | |
947 | case is_function_declaration: | |
948 | lf_putstr (file, "\n("); | |
949 | indent = 1; | |
950 | break; | |
951 | case is_function_variable: | |
952 | lf_putstr (file, ")\n("); | |
953 | indent = 1; | |
954 | break; | |
955 | } | |
956 | lf_indent (file, +indent); | |
957 | print_semantic_function_formal (file, nr_prefetched_words); | |
958 | lf_putstr (file, ")"); | |
959 | lf_indent (file, -indent); | |
960 | switch (decl_type) | |
961 | { | |
962 | case is_function_definition: | |
963 | lf_printf (file, "\n"); | |
964 | break; | |
965 | case is_function_declaration: | |
966 | case is_function_variable: | |
967 | lf_putstr (file, ";\n"); | |
968 | break; | |
969 | } | |
970 | } | |
971 | ||
972 | ||
973 | ||
974 | void | |
975 | print_idecode_globals (lf *file) | |
976 | { | |
977 | lf_printf (file, "enum {\n"); | |
978 | lf_printf (file, " /* greater or equal to zero => table */\n"); | |
979 | lf_printf (file, " function_entry = -1,\n"); | |
980 | lf_printf (file, " boolean_entry = -2,\n"); | |
981 | lf_printf (file, "};\n"); | |
982 | lf_printf (file, "\n"); | |
983 | lf_printf (file, "typedef struct _idecode_table_entry {\n"); | |
984 | lf_printf (file, " int shift;\n"); | |
985 | lf_printf (file, " unsigned%d mask;\n", options.insn_bit_size); | |
986 | lf_printf (file, " unsigned%d value;\n", options.insn_bit_size); | |
987 | lf_printf (file, " void *function_or_table;\n"); | |
988 | lf_printf (file, "} idecode_table_entry;\n"); | |
989 | } |