1 /* The IGEN simulator generator for GDB, the GNU Debugger.
3 Copyright 2002, 2007 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/>. */
30 #include "ld-decode.h"
34 #include "gen-idecode.h"
35 #include "gen-icache.h"
36 #include "gen-semantics.h"
41 lf_print_opcodes (lf *file, gen_entry *table)
47 ASSERT (table->opcode != NULL);
48 lf_printf (file, "_%d_%d",
49 table->opcode->first, table->opcode->last);
50 if (table->parent == NULL)
52 lf_printf (file, "__%d", table->opcode_nr);
53 table = table->parent;
62 print_idecode_ifetch (lf *file,
63 int previous_nr_prefetched_words,
64 int current_nr_prefetched_words)
67 for (word_nr = previous_nr_prefetched_words;
68 word_nr < current_nr_prefetched_words; word_nr++)
71 "instruction_word instruction_%d = IMEM%d_IMMED (cia, %d);\n",
72 word_nr, options.insn_bit_size, word_nr);
79 /****************************************************************/
83 lf_print_table_name (lf *file, gen_entry *table)
85 lf_printf (file, "idecode_table");
86 lf_print_opcodes (file, table);
92 print_idecode_table (lf *file, gen_entry *entry, const char *result)
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");
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");
127 lf_printf (file, "\n");
128 lf_printf (file, "/* call the leaf code */\n");
129 if (options.gen.code == generate_jumps)
131 lf_printf (file, "goto *table_entry->function_or_table;\n");
135 lf_printf (file, "%s ", result);
136 if (options.gen.icache)
139 "(((idecode_icache*)table_entry->function_or_table)\n");
140 lf_printf (file, " (");
141 print_icache_function_actual (file, 1);
142 lf_printf (file, "));\n");
147 "((idecode_semantic*)table_entry->function_or_table)\n");
148 lf_printf (file, " (");
149 print_semantic_function_actual (file, 1);
150 lf_printf (file, ");\n");
157 print_idecode_table_start (lf *file, gen_entry *table, int depth, void *data)
160 /* start of the table */
161 if (table->opcode_rule->gen == array_gen)
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");
171 print_idecode_table_leaf (lf *file, gen_entry *entry, int depth, void *data)
173 gen_entry *master_entry;
174 ASSERT (entry->parent != NULL);
176 if (entry->combined_parent == NULL)
177 master_entry = entry;
179 master_entry = entry->combined_parent;
181 /* add an entry to the table */
182 if (entry->parent->opcode_rule->gen == array_gen)
184 lf_printf (file, " /*%d*/ { ", entry->opcode_nr);
185 if (entry->opcode == NULL)
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)
192 lf_printf (file, "&&");
194 print_function_name (file,
195 entry->insns->insn->name,
196 entry->insns->insn->format_name,
198 master_entry->expanded_bits,
200 ? function_name_prefix_icache
201 : function_name_prefix_semantics));
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)
207 /* table calling switch statement */
208 lf_printf (file, "function_entry, 0, 0, ");
209 if (options.gen.code == generate_jumps)
211 lf_printf (file, "&&");
213 lf_print_table_name (file, entry);
215 else if (entry->opcode->is_boolean)
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);
230 /* table `calling' another table */
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,
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);
239 lf_printf (file, " },\n");
244 print_idecode_table_end (lf *file, gen_entry *table, int depth, void *data)
247 if (table->opcode_rule->gen == array_gen)
249 lf_printf (file, "};\n");
253 /****************************************************************/
257 print_goto_switch_name (lf *file, gen_entry *entry)
259 lf_printf (file, "case_");
260 if (entry->opcode == NULL)
262 print_function_name (file,
263 entry->insns->insn->name,
264 entry->insns->insn->format_name,
266 entry->expanded_bits,
268 ? function_name_prefix_icache
269 : function_name_prefix_semantics));
273 lf_print_table_name (file, entry);
278 print_goto_switch_table_leaf (lf *file,
279 gen_entry *entry, int depth, void *data)
281 ASSERT (entry->parent != NULL);
283 ASSERT (entry->parent->opcode_rule->gen == goto_switch_gen);
284 ASSERT (entry->parent->opcode);
286 lf_printf (file, "/* %d */ &&", entry->opcode_nr);
287 if (entry->combined_parent != NULL)
288 print_goto_switch_name (file, entry->combined_parent);
290 print_goto_switch_name (file, entry);
291 lf_printf (file, ",\n");
295 print_goto_switch_break (lf *file, gen_entry *entry)
297 lf_printf (file, "goto break_");
298 lf_print_table_name (file, entry->parent);
299 lf_printf (file, ";\n");
304 print_goto_switch_table (lf *file, gen_entry *table)
306 lf_printf (file, "const static void *");
307 lf_print_table_name (file, table);
308 lf_printf (file, "[] = {\n");
309 lf_indent (file, +2);
310 gen_entry_traverse_tree (file, table, 0, NULL /*start */ ,
311 print_goto_switch_table_leaf, NULL /*end */ ,
313 lf_indent (file, -2);
314 lf_printf (file, "};\n");
318 void print_idecode_switch (lf *file, gen_entry *table, const char *result);
321 print_idecode_switch_start (lf *file, gen_entry *table, int depth, void *data)
323 /* const char *result = data; */
325 ASSERT (table->opcode_rule->gen == switch_gen
326 || table->opcode_rule->gen == goto_switch_gen
327 || table->opcode_rule->gen == padded_switch_gen);
329 if (table->opcode->is_boolean
330 || table->opcode_rule->gen == switch_gen
331 || table->opcode_rule->gen == padded_switch_gen)
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");
341 else if (table->opcode_rule->gen == goto_switch_gen)
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))
348 lf_printf (file, "{\n");
349 lf_indent (file, +2);
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));
370 ASSERT ("bad switch" == NULL);
376 print_idecode_switch_leaf (lf *file, gen_entry *entry, int depth, void *data)
378 const char *result = data;
379 ASSERT (entry->parent != NULL);
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);
386 /* skip over any instructions combined into another entry */
387 if (entry->combined_parent != NULL)
390 if (entry->parent->opcode->is_boolean && entry->opcode_nr == 0)
392 /* case: boolean false target */
393 lf_printf (file, "case %d:\n", entry->parent->opcode->boolean_constant);
395 else if (entry->parent->opcode->is_boolean && entry->opcode_nr != 0)
397 /* case: boolean true case */
398 lf_printf (file, "default:\n");
400 else if (entry->parent->opcode_rule->gen == switch_gen
401 || entry->parent->opcode_rule->gen == padded_switch_gen)
403 /* case: <opcode-nr> - switch */
405 for (cob = entry; cob != NULL; cob = cob->combined_next)
406 lf_printf (file, "case %d:\n", cob->opcode_nr);
408 else if (entry->parent->opcode_rule->gen == goto_switch_gen)
410 /* case: <opcode-nr> - goto-switch */
411 print_goto_switch_name (file, entry);
412 lf_printf (file, ":\n");
416 ERROR ("bad switch");
418 lf_printf (file, " {\n");
419 lf_indent (file, +4);
421 if (entry->opcode == NULL)
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)
430 lf_printf (file, "goto ");
433 lf_printf (file, "%s", result);
436 print_function_name (file,
437 entry->insns->insn->name,
438 entry->insns->insn->format_name,
440 entry->expanded_bits,
442 ? function_name_prefix_icache
443 : function_name_prefix_semantics));
444 if (options.gen.code == generate_calls)
446 lf_printf (file, " (");
447 print_semantic_function_actual (file,
448 entry->insns->semantic->
449 nr_prefetched_words);
450 lf_printf (file, ")");
452 lf_printf (file, ";\n");
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)
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");
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");
478 if (entry->parent->opcode->is_boolean
479 || entry->parent->opcode_rule->gen == switch_gen
480 || entry->parent->opcode_rule->gen == padded_switch_gen)
482 lf_printf (file, "break;\n");
484 else if (entry->parent->opcode_rule->gen == goto_switch_gen)
486 print_goto_switch_break (file, entry);
490 ERROR ("bad switch");
493 lf_indent (file, -4);
494 lf_printf (file, " }\n");
499 print_idecode_switch_illegal (lf *file, const char *result)
501 lf_indent (file, +2);
502 print_idecode_invalid (file, result, invalid_illegal);
503 lf_printf (file, "break;\n");
504 lf_indent (file, -2);
508 print_idecode_switch_end (lf *file, gen_entry *table, int depth, void *data)
510 const char *result = data;
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);
517 if (table->opcode->is_boolean)
519 lf_printf (file, "}\n");
520 lf_indent (file, -2);
522 else if (table->opcode_rule->gen == switch_gen
523 || table->opcode_rule->gen == padded_switch_gen)
525 lf_printf (file, "default:\n");
526 lf_indent (file, +2);
527 if (table->nr_entries == table->opcode->nr_opcodes)
529 print_sim_engine_abort (file,
530 "Internal error - bad switch generated");
531 lf_printf (file, "%sNULL_CIA;\n", result);
532 lf_printf (file, "break;\n");
536 print_idecode_switch_illegal (file, result);
538 lf_indent (file, -2);
539 lf_printf (file, "}\n");
540 lf_indent (file, -2);
542 else if (table->opcode_rule->gen == goto_switch_gen)
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_");
549 lf_print_table_name (file, table);
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))
556 lf_indent (file, -2);
557 lf_printf (file, "}\n");
562 ERROR ("bad switch");
568 print_idecode_switch (lf *file, gen_entry *table, const char *result)
570 gen_entry_traverse_tree (file, table,
572 print_idecode_switch_start,
573 print_idecode_switch_leaf,
574 print_idecode_switch_end, (void *) result);
579 print_idecode_switch_function_header (lf *file,
581 int is_function_definition,
582 int nr_prefetched_words)
584 lf_printf (file, "\n");
585 if (options.gen.code == generate_calls)
587 lf_printf (file, "static ");
588 if (options.gen.icache)
590 lf_printf (file, "idecode_semantic *");
594 lf_printf (file, "unsigned_word");
596 if (is_function_definition)
598 lf_printf (file, "\n");
602 lf_printf (file, " ");
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)
610 lf_printf (file, ";");
612 lf_printf (file, "\n");
614 if (options.gen.code == generate_jumps && is_function_definition)
616 lf_indent (file, -1);
617 lf_print_table_name (file, table);
618 lf_printf (file, ":\n");
619 lf_indent (file, +1);
625 idecode_declare_if_switch (lf *file, gen_entry *table, int depth, void *data)
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 */
628 && table->parent->opcode_rule->gen == array_gen)
630 print_idecode_switch_function_header (file,
632 0 /*isnt function definition */ ,
639 idecode_expand_if_switch (lf *file, gen_entry *table, int depth, void *data)
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 */
642 && table->parent->opcode_rule->gen == array_gen)
644 print_idecode_switch_function_header (file,
646 1 /*is function definition */ ,
648 if (options.gen.code == generate_calls)
650 lf_printf (file, "{\n");
651 lf_indent (file, +2);
653 print_idecode_switch (file, table, "return");
654 if (options.gen.code == generate_calls)
656 lf_indent (file, -2);
657 lf_printf (file, "}\n");
663 /****************************************************************/
667 print_idecode_lookups (lf *file, gen_entry *table, cache_entry *cache_rules)
671 /* output switch function declarations where needed by tables */
672 gen_entry_traverse_tree (file, table, 1, idecode_declare_if_switch, /* START */
675 /* output tables where needed */
676 for (depth = gen_entry_depth (table); depth > 0; depth--)
678 gen_entry_traverse_tree (file, table,
680 print_idecode_table_start,
681 print_idecode_table_leaf,
682 print_idecode_table_end, NULL);
685 /* output switch functions where needed */
686 gen_entry_traverse_tree (file, table, 1, idecode_expand_if_switch, /* START */
692 print_idecode_body (lf *file, gen_entry *table, const char *result)
694 if (table->opcode_rule->gen == switch_gen
695 || table->opcode_rule->gen == goto_switch_gen
696 || table->opcode_rule->gen == padded_switch_gen)
698 print_idecode_switch (file, table, result);
702 print_idecode_table (file, table, result);
707 /****************************************************************/
711 print_jump (lf *file, int is_tail)
715 lf_putstr (file, "if (keep_running != NULL && !*keep_running)\n");
716 lf_putstr (file, " cpu_halt(cpu, nia, was_continuing, 0/*na*/);\n");
719 if (!options.generate_smp)
721 lf_putstr (file, "if (WITH_EVENTS) {\n");
722 lf_putstr (file, " if (event_queue_tick(events)) {\n");
723 lf_putstr (file, " cpu_set_program_counter(cpu, nia);\n");
724 lf_putstr (file, " event_queue_process(events);\n");
725 lf_putstr (file, " nia = cpu_get_program_counter(cpu);\n");
726 lf_putstr (file, " }\n");
727 lf_putstr (file, "}\n");
730 if (options.generate_smp)
734 lf_putstr (file, "cpu_set_program_counter(cpu, nia);\n");
736 lf_putstr (file, "if (WITH_EVENTS) {\n");
737 lf_putstr (file, " current_cpu += 1;\n");
738 lf_putstr (file, " if (current_cpu >= nr_cpus) {\n");
739 lf_putstr (file, " if (event_queue_tick(events)) {\n");
740 lf_putstr (file, " event_queue_process(events);\n");
741 lf_putstr (file, " }\n");
742 lf_putstr (file, " current_cpu = 0;\n");
743 lf_putstr (file, " }\n");
744 lf_putstr (file, "}\n");
745 lf_putstr (file, "else {\n");
746 lf_putstr (file, " current_cpu = (current_cpu + 1) % nr_cpus;\n");
747 lf_putstr (file, "}\n");
748 lf_putstr (file, "cpu = cpus[current_cpu];\n");
749 lf_putstr (file, "nia = cpu_get_program_counter(cpu);\n");
752 if (options.gen.icache)
754 lf_putstr (file, "cache_entry = cpu_icache_entry(cpu, nia);\n");
755 lf_putstr (file, "if (cache_entry->address == nia) {\n");
756 lf_putstr (file, " /* cache hit */\n");
757 lf_putstr (file, " goto *cache_entry->semantic;\n");
758 lf_putstr (file, "}\n");
761 lf_putstr (file, "goto cache_miss;\n");
765 if (!options.gen.icache && is_tail)
767 lf_printf (file, "goto idecode;\n");
777 print_jump_insn (lf *file,
778 insn_entry * instruction,
779 insn_bits * expanded_bits,
780 opcode_field *opcodes, cache_entry *cache_rules)
783 /* what we are for the moment */
784 lf_printf (file, "\n");
785 print_my_defines (file, expanded_bits, instruction->name);
787 /* output the icache entry */
788 if (options.gen.icache)
790 lf_printf (file, "\n");
791 lf_indent (file, -1);
792 print_function_name (file,
794 expanded_bits, function_name_prefix_icache);
795 lf_printf (file, ":\n");
796 lf_indent (file, +1);
797 lf_printf (file, "{\n");
798 lf_indent (file, +2);
799 lf_putstr (file, "const unsigned_word cia = nia;\n");
800 print_itrace (file, instruction, 1 /*putting-value-in-cache */ );
801 print_idecode_validate (file, instruction, opcodes);
802 lf_printf (file, "\n");
803 lf_printf (file, "{\n");
804 lf_indent (file, +2);
805 print_icache_body (file, instruction, expanded_bits, cache_rules, 0, /*use_defines */
806 put_values_in_icache);
807 lf_printf (file, "cache_entry->address = nia;\n");
808 lf_printf (file, "cache_entry->semantic = &&");
809 print_function_name (file,
811 expanded_bits, function_name_prefix_semantics);
812 lf_printf (file, ";\n");
813 if (options.gen.semantic_icache)
815 print_semantic_body (file, instruction, expanded_bits, opcodes);
816 print_jump (file, 1 /*is-tail */ );
820 lf_printf (file, "/* goto ");
821 print_function_name (file,
823 expanded_bits, function_name_prefix_semantics);
824 lf_printf (file, "; */\n");
826 lf_indent (file, -2);
827 lf_putstr (file, "}\n");
828 lf_indent (file, -2);
829 lf_printf (file, "}\n");
832 /* print the semantics */
833 lf_printf (file, "\n");
834 lf_indent (file, -1);
835 print_function_name (file,
837 expanded_bits, function_name_prefix_semantics);
838 lf_printf (file, ":\n");
839 lf_indent (file, +1);
840 lf_printf (file, "{\n");
841 lf_indent (file, +2);
842 lf_putstr (file, "const unsigned_word cia = nia;\n");
843 print_icache_body (file,
847 (options.gen.direct_access
849 : declare_variables),
851 ? get_values_from_icache : do_not_use_icache));
852 print_semantic_body (file, instruction, expanded_bits, opcodes);
853 if (options.gen.direct_access)
854 print_icache_body (file,
860 ? get_values_from_icache : do_not_use_icache));
861 print_jump (file, 1 /*is tail */ );
862 lf_indent (file, -2);
863 lf_printf (file, "}\n");
870 print_jump_definition (lf *file,
872 insn_entry * insn, int depth, void *data)
874 cache_entry *cache_rules = (cache_entry *) data;
875 if (options.generate_expanded_instructions)
877 ASSERT (entry->nr_insns == 1
878 && entry->opcode == NULL
879 && entry->parent != NULL && entry->parent->opcode != NULL);
880 ASSERT (entry->nr_insns == 1
881 && entry->opcode == NULL
882 && entry->parent != NULL
883 && entry->parent->opcode != NULL
884 && entry->parent->opcode_rule != NULL);
885 print_jump_insn (file,
886 entry->insns->words[0]->insn,
887 entry->expanded_bits, entry->opcode, cache_rules);
891 print_jump_insn (file,
892 instruction->words[0]->insn, NULL, NULL, cache_rules);
899 print_jump_internal_function (lf *file,
901 function_entry * function, void *data)
903 if (function->is_internal)
905 lf_printf (file, "\n");
906 lf_print__line_ref (file, function->line);
907 lf_indent (file, -1);
908 print_function_name (file,
912 ? function_name_prefix_icache
913 : function_name_prefix_semantics));
914 lf_printf (file, ":\n");
915 lf_indent (file, +1);
916 lf_printf (file, "{\n");
917 lf_indent (file, +2);
918 lf_printf (file, "const unsigned_word cia = nia;\n");
919 table_print_code (file, function->code);
920 lf_print__internal_ref (file);
921 print_sim_engine_abort (file, "Internal function must longjump");
922 lf_indent (file, -2);
923 lf_printf (file, "}\n");
932 print_jump_until_stop_body (lf *file,
933 insn_table *table, cache_table * cache_rules)
935 lf_printf (file, "{\n");
936 lf_indent (file, +2);
937 lf_putstr (file, "jmp_buf halt;\n");
938 lf_putstr (file, "jmp_buf restart;\n");
939 lf_putstr (file, "sim_cpu *cpu = NULL;\n");
940 lf_putstr (file, "unsigned_word nia = -1;\n");
941 lf_putstr (file, "instruction_word instruction = 0;\n");
942 if ((code & generate_with_icache))
944 lf_putstr (file, "idecode_cache *cache_entry = NULL;\n");
948 lf_putstr (file, "int current_cpu = -1;\n");
951 /* all the switches and tables - they know about jumping */
952 print_idecode_lookups (file, table, cache_rules);
954 /* start the simulation up */
955 if ((code & generate_with_icache))
957 lf_putstr (file, "\n");
958 lf_putstr (file, "{\n");
959 lf_putstr (file, " int cpu_nr;\n");
960 lf_putstr (file, " for (cpu_nr = 0; cpu_nr < nr_cpus; cpu_nr++)\n");
961 lf_putstr (file, " cpu_flush_icache(cpus[cpu_nr]);\n");
962 lf_putstr (file, "}\n");
965 lf_putstr (file, "\n");
966 lf_putstr (file, "psim_set_halt_and_restart(system, &halt, &restart);\n");
968 lf_putstr (file, "\n");
969 lf_putstr (file, "if (setjmp(halt))\n");
970 lf_putstr (file, " return;\n");
972 lf_putstr (file, "\n");
973 lf_putstr (file, "setjmp(restart);\n");
975 lf_putstr (file, "\n");
978 lf_putstr (file, "cpu = cpus[0];\n");
979 lf_putstr (file, "nia = cpu_get_program_counter(cpu);\n");
983 lf_putstr (file, "current_cpu = psim_last_cpu(system);\n");
986 if (!(code & generate_with_icache))
988 lf_printf (file, "\n");
989 lf_indent (file, -1);
990 lf_printf (file, "idecode:\n");
991 lf_indent (file, +1);
994 print_jump (file, 0 /*is_tail */ );
996 if ((code & generate_with_icache))
998 lf_indent (file, -1);
999 lf_printf (file, "cache_miss:\n");
1000 lf_indent (file, +1);
1003 lf_putstr (file, "instruction\n");
1004 lf_putstr (file, " = vm_instruction_map_read(cpu_instruction_map(cpu),\n");
1005 lf_putstr (file, " cpu, nia);\n");
1006 print_idecode_body (file, table, "/*IGORE*/");
1008 /* print out a table of all the internals functions */
1009 insn_table_traverse_function (table,
1010 file, NULL, print_jump_internal_function);
1012 /* print out a table of all the instructions */
1013 if (generate_expanded_instructions)
1014 insn_table_traverse_tree (table, file, cache_rules, 1, NULL, /* start */
1015 print_jump_definition, /* leaf */
1017 NULL); /* padding */
1019 insn_table_traverse_insn (table,
1020 file, cache_rules, print_jump_definition);
1021 lf_indent (file, -2);
1022 lf_printf (file, "}\n");
1026 /****************************************************************/
1030 /* Output code to do any final checks on the decoded instruction.
1031 This includes things like verifying any on decoded fields have the
1032 correct value and checking that (for floating point) floating point
1033 hardware isn't disabled */
1036 print_idecode_validate (lf *file,
1037 insn_entry * instruction, insn_opcodes *opcode_paths)
1039 /* Validate: unchecked instruction fields
1041 If any constant fields in the instruction were not checked by the
1042 idecode tables, output code to check that they have the correct
1047 lf_printf (file, "\n");
1048 lf_indent_suppress (file);
1049 lf_printf (file, "#if defined (WITH_RESERVED_BITS)\n");
1050 lf_printf (file, "/* validate: ");
1051 print_insn_words (file, instruction);
1052 lf_printf (file, " */\n");
1053 for (word_nr = 0; word_nr < instruction->nr_words; word_nr++)
1055 insn_uint check_mask = 0;
1056 insn_uint check_val = 0;
1057 insn_word_entry *word = instruction->word[word_nr];
1060 /* form check_mask/check_val containing what needs to be checked
1061 in the instruction */
1062 for (bit_nr = 0; bit_nr < options.insn_bit_size; bit_nr++)
1064 insn_bit_entry *bit = word->bit[bit_nr];
1065 insn_field_entry *field = bit->field;
1067 /* Make space for the next bit */
1071 /* Only need to validate constant (and reserved)
1072 bits. Skip any others */
1073 if (field->type != insn_field_int
1074 && field->type != insn_field_reserved)
1077 /* Look through the list of opcode paths that lead to this
1078 instruction. See if any have failed to check the
1080 if (opcode_paths != NULL)
1082 insn_opcodes *entry;
1083 for (entry = opcode_paths; entry != NULL; entry = entry->next)
1085 opcode_field *opcode;
1086 for (opcode = entry->opcode;
1087 opcode != NULL; opcode = opcode->parent)
1089 if (opcode->word_nr == word_nr
1090 && opcode->first <= bit_nr
1091 && opcode->last >= bit_nr)
1092 /* we've decoded on this bit */
1096 /* the bit wasn't decoded on */
1100 /* all the opcode paths decoded on BIT_NR, no need
1106 check_val |= bit->value;
1109 /* if any bits not checked by opcode tables, output code to check them */
1114 lf_printf (file, "if (WITH_RESERVED_BITS)\n");
1115 lf_printf (file, " {\n");
1116 lf_indent (file, +4);
1119 if (options.insn_bit_size > 32)
1121 lf_printf (file, "if ((instruction_%d\n", word_nr);
1122 lf_printf (file, " & UNSIGNED64 (0x%08lx%08lx))\n",
1123 (unsigned long) (check_mask >> 32),
1124 (unsigned long) (check_mask));
1125 lf_printf (file, " != UNSIGNED64 (0x%08lx%08lx))\n",
1126 (unsigned long) (check_val >> 32),
1127 (unsigned long) (check_val));
1132 "if ((instruction_%d & 0x%08lx) != 0x%08lx)\n",
1133 word_nr, (unsigned long) (check_mask),
1134 (unsigned long) (check_val));
1136 lf_indent (file, +2);
1137 print_idecode_invalid (file, "return", invalid_illegal);
1138 lf_indent (file, -2);
1143 lf_indent (file, -4);
1144 lf_printf (file, " }\n");
1146 lf_indent_suppress (file);
1147 lf_printf (file, "#endif\n");
1150 /* Validate: Floating Point hardware
1152 If the simulator is being built with out floating point hardware
1153 (different to it being disabled in the MSR) then floating point
1154 instructions are invalid */
1156 if (filter_is_member (instruction->flags, "f"))
1158 lf_printf (file, "\n");
1159 lf_indent_suppress (file);
1160 lf_printf (file, "#if defined(CURRENT_FLOATING_POINT)\n");
1161 lf_printf (file, "/* Validate: FP hardware exists */\n");
1163 "if (CURRENT_FLOATING_POINT != HARD_FLOATING_POINT) {\n");
1164 lf_indent (file, +2);
1165 print_idecode_invalid (file, "return", invalid_illegal);
1166 lf_indent (file, -2);
1167 lf_printf (file, "}\n");
1168 lf_indent_suppress (file);
1169 lf_printf (file, "#endif\n");
1173 /* Validate: Floating Point available
1175 If floating point is not available, we enter a floating point
1176 unavailable interrupt into the cache instead of the instruction
1179 The PowerPC spec requires a CSI after MSR[FP] is changed and when
1180 ever a CSI occures we flush the instruction cache. */
1183 if (filter_is_member (instruction->flags, "f"))
1185 lf_printf (file, "\n");
1186 lf_indent_suppress (file);
1187 lf_printf (file, "#if defined(IS_FP_AVAILABLE)\n");
1188 lf_printf (file, "/* Validate: FP available according to cpu */\n");
1189 lf_printf (file, "if (!IS_FP_AVAILABLE) {\n");
1190 lf_indent (file, +2);
1191 print_idecode_invalid (file, "return", invalid_fp_unavailable);
1192 lf_indent (file, -2);
1193 lf_printf (file, "}\n");
1194 lf_indent_suppress (file);
1195 lf_printf (file, "#endif\n");
1199 /* Validate: Validate Instruction in correct slot
1201 Some architectures place restrictions on the slot that an
1202 instruction can be issued in */
1205 if (filter_is_member (instruction->options, "s")
1206 || options.gen.slot_verification)
1208 lf_printf (file, "\n");
1209 lf_indent_suppress (file);
1210 lf_printf (file, "#if defined(IS_WRONG_SLOT)\n");
1212 "/* Validate: Instruction issued in correct slot */\n");
1213 lf_printf (file, "if (IS_WRONG_SLOT) {\n");
1214 lf_indent (file, +2);
1215 print_idecode_invalid (file, "return", invalid_wrong_slot);
1216 lf_indent (file, -2);
1217 lf_printf (file, "}\n");
1218 lf_indent_suppress (file);
1219 lf_printf (file, "#endif\n");
1226 /****************************************************************/
1230 print_idecode_issue_function_header (lf *file,
1231 const char *processor,
1232 function_decl_type decl_type,
1233 int nr_prefetched_words)
1236 lf_printf (file, "\n");
1239 case is_function_declaration:
1240 lf_print__function_type_function (file, print_semantic_function_type,
1241 "INLINE_IDECODE", " ");
1243 case is_function_definition:
1244 lf_print__function_type_function (file, print_semantic_function_type,
1245 "INLINE_IDECODE", "\n");
1247 case is_function_variable:
1248 print_semantic_function_type (file);
1249 lf_printf (file, " (*");
1252 indent = print_function_name (file,
1256 NULL, function_name_prefix_idecode);
1259 case is_function_definition:
1260 indent += lf_printf (file, " (");
1262 case is_function_declaration:
1263 lf_putstr (file, "\n(");
1266 case is_function_variable:
1267 lf_putstr (file, ")\n(");
1271 lf_indent (file, +indent);
1272 print_semantic_function_formal (file, nr_prefetched_words);
1273 lf_putstr (file, ")");
1274 lf_indent (file, -indent);
1277 case is_function_definition:
1278 lf_printf (file, "\n");
1280 case is_function_declaration:
1281 case is_function_variable:
1282 lf_putstr (file, ";\n");
1290 print_idecode_globals (lf *file)
1292 lf_printf (file, "enum {\n");
1293 lf_printf (file, " /* greater or equal to zero => table */\n");
1294 lf_printf (file, " function_entry = -1,\n");
1295 lf_printf (file, " boolean_entry = -2,\n");
1296 lf_printf (file, "};\n");
1297 lf_printf (file, "\n");
1298 lf_printf (file, "typedef struct _idecode_table_entry {\n");
1299 lf_printf (file, " int shift;\n");
1300 lf_printf (file, " unsigned%d mask;\n", options.insn_bit_size);
1301 lf_printf (file, " unsigned%d value;\n", options.insn_bit_size);
1302 lf_printf (file, " void *function_or_table;\n");
1303 lf_printf (file, "} idecode_table_entry;\n");