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Diffstat (limited to 'sim/igen/gen-idecode.c')
| -rw-r--r-- | sim/igen/gen-idecode.c | 1306 |
1 files changed, 0 insertions, 1306 deletions
diff --git a/sim/igen/gen-idecode.c b/sim/igen/gen-idecode.c deleted file mode 100644 index 639b563..0000000 --- a/sim/igen/gen-idecode.c +++ /dev/null @@ -1,1306 +0,0 @@ -/* The IGEN simulator generator for GDB, the GNU Debugger. - - Copyright 2002 Free Software Foundation, Inc. - - Contributed by Andrew Cagney. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - - -#include "misc.h" -#include "lf.h" -#include "table.h" -#include "filter.h" -#include "igen.h" - -#include "ld-insn.h" -#include "ld-decode.h" - -#include "gen.h" - -#include "gen-idecode.h" -#include "gen-icache.h" -#include "gen-semantics.h" - - - -static void -lf_print_opcodes (lf *file, gen_entry *table) -{ - if (table !=NULL) - { - while (1) - { - ASSERT (table->opcode != NULL); - lf_printf (file, "_%d_%d", - table->opcode->first, table->opcode->last); - if (table->parent == NULL) - break; - lf_printf (file, "__%d", table->opcode_nr); - table = table->parent; - } - } -} - - - - -static void -print_idecode_ifetch (lf *file, - int previous_nr_prefetched_words, - int current_nr_prefetched_words) -{ - int word_nr; - for (word_nr = previous_nr_prefetched_words; - word_nr < current_nr_prefetched_words; word_nr++) - { - lf_printf (file, - "instruction_word instruction_%d = IMEM%d_IMMED (cia, %d);\n", - word_nr, options.insn_bit_size, word_nr); - - } -} - - - -/****************************************************************/ - - -static void -lf_print_table_name (lf *file, gen_entry *table) -{ - lf_printf (file, "idecode_table"); - lf_print_opcodes (file, table); -} - - - -static void -print_idecode_table (lf *file, gen_entry *entry, const char *result) -{ - lf_printf (file, "/* prime the search */\n"); - lf_printf (file, "idecode_table_entry *table = "); - lf_print_table_name (file, entry); - lf_printf (file, ";\n"); - lf_printf (file, "int opcode = EXTRACTED%d (instruction, %d, %d);\n", - options.insn_bit_size, - i2target (options.hi_bit_nr, entry->opcode->first), - i2target (options.hi_bit_nr, entry->opcode->last)); - lf_printf (file, "idecode_table_entry *table_entry = table + opcode;\n"); - - lf_printf (file, "\n"); - lf_printf (file, "/* iterate until a leaf */\n"); - lf_printf (file, "while (1) {\n"); - lf_printf (file, " signed shift = table_entry->shift;\n"); - lf_printf (file, "if (shift == function_entry) break;\n"); - lf_printf (file, " if (shift >= 0) {\n"); - lf_printf (file, " table = ((idecode_table_entry*)\n"); - lf_printf (file, " table_entry->function_or_table);\n"); - lf_printf (file, " opcode = ((instruction & table_entry->mask)\n"); - lf_printf (file, " >> shift);\n"); - lf_printf (file, " table_entry = table + opcode;\n"); - lf_printf (file, " }\n"); - lf_printf (file, " else {\n"); - lf_printf (file, " /* must be a boolean */\n"); - lf_printf (file, " ASSERT(table_entry->shift == boolean_entry);\n"); - lf_printf (file, " opcode = ((instruction & table_entry->mask)\n"); - lf_printf (file, " != table_entry->value);\n"); - lf_printf (file, " table = ((idecode_table_entry*)\n"); - lf_printf (file, " table_entry->function_or_table);\n"); - lf_printf (file, " table_entry = table + opcode;\n"); - lf_printf (file, " }\n"); - lf_printf (file, "}\n"); - - lf_printf (file, "\n"); - lf_printf (file, "/* call the leaf code */\n"); - if (options.gen.code == generate_jumps) - { - lf_printf (file, "goto *table_entry->function_or_table;\n"); - } - else - { - lf_printf (file, "%s ", result); - if (options.gen.icache) - { - lf_printf (file, - "(((idecode_icache*)table_entry->function_or_table)\n"); - lf_printf (file, " ("); - print_icache_function_actual (file, 1); - lf_printf (file, "));\n"); - } - else - { - lf_printf (file, - "((idecode_semantic*)table_entry->function_or_table)\n"); - lf_printf (file, " ("); - print_semantic_function_actual (file, 1); - lf_printf (file, ");\n"); - } - } -} - - -static void -print_idecode_table_start (lf *file, gen_entry *table, int depth, void *data) -{ - ASSERT (depth == 0); - /* start of the table */ - if (table->opcode_rule->gen == array_gen) - { - lf_printf (file, "\n"); - lf_printf (file, "static idecode_table_entry "); - lf_print_table_name (file, table); - lf_printf (file, "[] = {\n"); - } -} - -static void -print_idecode_table_leaf (lf *file, gen_entry *entry, int depth, void *data) -{ - gen_entry *master_entry; - ASSERT (entry->parent != NULL); - ASSERT (depth == 0); - if (entry->combined_parent == NULL) - master_entry = entry; - else - master_entry = entry->combined_parent; - - /* add an entry to the table */ - if (entry->parent->opcode_rule->gen == array_gen) - { - lf_printf (file, " /*%d*/ { ", entry->opcode_nr); - if (entry->opcode == NULL) - { - ASSERT (entry->nr_insns == 1); - /* table leaf entry */ - lf_printf (file, "function_entry, 0, 0, "); - if (options.gen.code == generate_jumps) - { - lf_printf (file, "&&"); - } - print_function_name (file, - entry->insns->insn->name, - entry->insns->insn->format_name, - NULL, - master_entry->expanded_bits, - (options.gen.icache - ? function_name_prefix_icache - : function_name_prefix_semantics)); - } - else if (entry->opcode_rule->gen == switch_gen - || entry->opcode_rule->gen == goto_switch_gen - || entry->opcode_rule->gen == padded_switch_gen) - { - /* table calling switch statement */ - lf_printf (file, "function_entry, 0, 0, "); - if (options.gen.code == generate_jumps) - { - lf_printf (file, "&&"); - } - lf_print_table_name (file, entry); - } - else if (entry->opcode->is_boolean) - { - /* table `calling' boolean table */ - lf_printf (file, "boolean_entry, "); - lf_printf (file, "MASK32(%d, %d), ", - i2target (options.hi_bit_nr, entry->opcode->first), - i2target (options.hi_bit_nr, entry->opcode->last)); - lf_printf (file, "INSERTED32(%d, %d, %d), ", - entry->opcode->boolean_constant, - i2target (options.hi_bit_nr, entry->opcode->first), - i2target (options.hi_bit_nr, entry->opcode->last)); - lf_print_table_name (file, entry); - } - else - { - /* table `calling' another table */ - lf_printf (file, "%d, ", - options.insn_bit_size - entry->opcode->last - 1); - lf_printf (file, "MASK%d(%d,%d), ", options.insn_bit_size, - i2target (options.hi_bit_nr, entry->opcode->first), - i2target (options.hi_bit_nr, entry->opcode->last)); - lf_printf (file, "0, "); - lf_print_table_name (file, entry); - } - lf_printf (file, " },\n"); - } -} - -static void -print_idecode_table_end (lf *file, gen_entry *table, int depth, void *data) -{ - ASSERT (depth == 0); - if (table->opcode_rule->gen == array_gen) - { - lf_printf (file, "};\n"); - } -} - -/****************************************************************/ - - -static void -print_goto_switch_name (lf *file, gen_entry *entry) -{ - lf_printf (file, "case_"); - if (entry->opcode == NULL) - { - print_function_name (file, - entry->insns->insn->name, - entry->insns->insn->format_name, - NULL, - entry->expanded_bits, - (options.gen.icache - ? function_name_prefix_icache - : function_name_prefix_semantics)); - } - else - { - lf_print_table_name (file, entry); - } -} - -static void -print_goto_switch_table_leaf (lf *file, - gen_entry *entry, int depth, void *data) -{ - ASSERT (entry->parent != NULL); - ASSERT (depth == 0); - ASSERT (entry->parent->opcode_rule->gen == goto_switch_gen); - ASSERT (entry->parent->opcode); - - lf_printf (file, "/* %d */ &&", entry->opcode_nr); - if (entry->combined_parent != NULL) - print_goto_switch_name (file, entry->combined_parent); - else - print_goto_switch_name (file, entry); - lf_printf (file, ",\n"); -} - -static void -print_goto_switch_break (lf *file, gen_entry *entry) -{ - lf_printf (file, "goto break_"); - lf_print_table_name (file, entry->parent); - lf_printf (file, ";\n"); -} - - -static void -print_goto_switch_table (lf *file, gen_entry *table) -{ - lf_printf (file, "const static void *"); - lf_print_table_name (file, table); - lf_printf (file, "[] = {\n"); - lf_indent (file, +2); - gen_entry_traverse_tree (file, table, 0, NULL /*start */ , - print_goto_switch_table_leaf, NULL /*end */ , - NULL /*data */ ); - lf_indent (file, -2); - lf_printf (file, "};\n"); -} - - -void print_idecode_switch (lf *file, gen_entry *table, const char *result); - -static void -print_idecode_switch_start (lf *file, gen_entry *table, int depth, void *data) -{ - /* const char *result = data; */ - ASSERT (depth == 0); - ASSERT (table->opcode_rule->gen == switch_gen - || table->opcode_rule->gen == goto_switch_gen - || table->opcode_rule->gen == padded_switch_gen); - - if (table->opcode->is_boolean - || table->opcode_rule->gen == switch_gen - || table->opcode_rule->gen == padded_switch_gen) - { - lf_printf (file, "switch (EXTRACTED%d (instruction_%d, %d, %d))\n", - options.insn_bit_size, - table->opcode_rule->word_nr, - i2target (options.hi_bit_nr, table->opcode->first), - i2target (options.hi_bit_nr, table->opcode->last)); - lf_indent (file, +2); - lf_printf (file, "{\n"); - } - else if (table->opcode_rule->gen == goto_switch_gen) - { - if (table->parent != NULL - && (table->parent->opcode_rule->gen == switch_gen - || table->parent->opcode_rule->gen == goto_switch_gen - || table->parent->opcode_rule->gen == padded_switch_gen)) - { - lf_printf (file, "{\n"); - lf_indent (file, +2); - } - print_goto_switch_table (file, table); - lf_printf (file, "ASSERT (EXTRACTED%d (instruction_%d, %d, %d)\n", - options.insn_bit_size, - table->opcode->word_nr, - i2target (options.hi_bit_nr, table->opcode->first), - i2target (options.hi_bit_nr, table->opcode->last)); - lf_printf (file, " < (sizeof ("); - lf_print_table_name (file, table); - lf_printf (file, ") / sizeof(void*)));\n"); - lf_printf (file, "goto *"); - lf_print_table_name (file, table); - lf_printf (file, "[EXTRACTED%d (instruction_%d, %d, %d)];\n", - options.insn_bit_size, - table->opcode->word_nr, - i2target (options.hi_bit_nr, table->opcode->first), - i2target (options.hi_bit_nr, table->opcode->last)); - } - else - { - ASSERT ("bad switch" == NULL); - } -} - - -static void -print_idecode_switch_leaf (lf *file, gen_entry *entry, int depth, void *data) -{ - const char *result = data; - ASSERT (entry->parent != NULL); - ASSERT (depth == 0); - ASSERT (entry->parent->opcode_rule->gen == switch_gen - || entry->parent->opcode_rule->gen == goto_switch_gen - || entry->parent->opcode_rule->gen == padded_switch_gen); - ASSERT (entry->parent->opcode); - - /* skip over any instructions combined into another entry */ - if (entry->combined_parent != NULL) - return; - - if (entry->parent->opcode->is_boolean && entry->opcode_nr == 0) - { - /* case: boolean false target */ - lf_printf (file, "case %d:\n", entry->parent->opcode->boolean_constant); - } - else if (entry->parent->opcode->is_boolean && entry->opcode_nr != 0) - { - /* case: boolean true case */ - lf_printf (file, "default:\n"); - } - else if (entry->parent->opcode_rule->gen == switch_gen - || entry->parent->opcode_rule->gen == padded_switch_gen) - { - /* case: <opcode-nr> - switch */ - gen_entry *cob; - for (cob = entry; cob != NULL; cob = cob->combined_next) - lf_printf (file, "case %d:\n", cob->opcode_nr); - } - else if (entry->parent->opcode_rule->gen == goto_switch_gen) - { - /* case: <opcode-nr> - goto-switch */ - print_goto_switch_name (file, entry); - lf_printf (file, ":\n"); - } - else - { - ERROR ("bad switch"); - } - lf_printf (file, " {\n"); - lf_indent (file, +4); - { - if (entry->opcode == NULL) - { - /* switch calling leaf */ - ASSERT (entry->nr_insns == 1); - print_idecode_ifetch (file, entry->nr_prefetched_words, - entry->insns->semantic->nr_prefetched_words); - switch (options.gen.code) - { - case generate_jumps: - lf_printf (file, "goto "); - break; - case generate_calls: - lf_printf (file, "%s", result); - break; - } - print_function_name (file, - entry->insns->insn->name, - entry->insns->insn->format_name, - NULL, - entry->expanded_bits, - (options.gen.icache - ? function_name_prefix_icache - : function_name_prefix_semantics)); - if (options.gen.code == generate_calls) - { - lf_printf (file, " ("); - print_semantic_function_actual (file, - entry->insns->semantic-> - nr_prefetched_words); - lf_printf (file, ")"); - } - lf_printf (file, ";\n"); - } - else if (entry->opcode_rule->gen == switch_gen - || entry->opcode_rule->gen == goto_switch_gen - || entry->opcode_rule->gen == padded_switch_gen) - { - /* switch calling switch */ - lf_printf (file, "{\n"); - lf_indent (file, +2); - print_idecode_ifetch (file, entry->parent->nr_prefetched_words, - entry->nr_prefetched_words); - print_idecode_switch (file, entry, result); - lf_indent (file, -2); - lf_printf (file, "}\n"); - } - else - { - /* switch looking up a table */ - lf_printf (file, "{\n"); - lf_indent (file, +2); - print_idecode_ifetch (file, entry->parent->nr_prefetched_words, - entry->nr_prefetched_words); - print_idecode_table (file, entry, result); - lf_indent (file, -2); - lf_printf (file, "}\n"); - } - if (entry->parent->opcode->is_boolean - || entry->parent->opcode_rule->gen == switch_gen - || entry->parent->opcode_rule->gen == padded_switch_gen) - { - lf_printf (file, "break;\n"); - } - else if (entry->parent->opcode_rule->gen == goto_switch_gen) - { - print_goto_switch_break (file, entry); - } - else - { - ERROR ("bad switch"); - } - } - lf_indent (file, -4); - lf_printf (file, " }\n"); -} - - -static void -print_idecode_switch_illegal (lf *file, const char *result) -{ - lf_indent (file, +2); - print_idecode_invalid (file, result, invalid_illegal); - lf_printf (file, "break;\n"); - lf_indent (file, -2); -} - -static void -print_idecode_switch_end (lf *file, gen_entry *table, int depth, void *data) -{ - const char *result = data; - ASSERT (depth == 0); - ASSERT (table->opcode_rule->gen == switch_gen - || table->opcode_rule->gen == goto_switch_gen - || table->opcode_rule->gen == padded_switch_gen); - ASSERT (table->opcode); - - if (table->opcode->is_boolean) - { - lf_printf (file, "}\n"); - lf_indent (file, -2); - } - else if (table->opcode_rule->gen == switch_gen - || table->opcode_rule->gen == padded_switch_gen) - { - lf_printf (file, "default:\n"); - lf_indent (file, +2); - if (table->nr_entries == table->opcode->nr_opcodes) - { - print_sim_engine_abort (file, - "Internal error - bad switch generated"); - lf_printf (file, "%sNULL_CIA;\n", result); - lf_printf (file, "break;\n"); - } - else - { - print_idecode_switch_illegal (file, result); - } - lf_indent (file, -2); - lf_printf (file, "}\n"); - lf_indent (file, -2); - } - else if (table->opcode_rule->gen == goto_switch_gen) - { - lf_printf (file, "illegal_"); - lf_print_table_name (file, table); - lf_printf (file, ":\n"); - print_idecode_invalid (file, result, invalid_illegal); - lf_printf (file, "break_"); - lf_print_table_name (file, table); - lf_printf (file, ":;\n"); - if (table->parent != NULL - && (table->parent->opcode_rule->gen == switch_gen - || table->parent->opcode_rule->gen == goto_switch_gen - || table->parent->opcode_rule->gen == padded_switch_gen)) - { - lf_indent (file, -2); - lf_printf (file, "}\n"); - } - } - else - { - ERROR ("bad switch"); - } -} - - -void -print_idecode_switch (lf *file, gen_entry *table, const char *result) -{ - gen_entry_traverse_tree (file, table, - 0, - print_idecode_switch_start, - print_idecode_switch_leaf, - print_idecode_switch_end, (void *) result); -} - - -static void -print_idecode_switch_function_header (lf *file, - gen_entry *table, - int is_function_definition, - int nr_prefetched_words) -{ - lf_printf (file, "\n"); - if (options.gen.code == generate_calls) - { - lf_printf (file, "static "); - if (options.gen.icache) - { - lf_printf (file, "idecode_semantic *"); - } - else - { - lf_printf (file, "unsigned_word"); - } - if (is_function_definition) - { - lf_printf (file, "\n"); - } - else - { - lf_printf (file, " "); - } - lf_print_table_name (file, table); - lf_printf (file, "\n("); - print_icache_function_formal (file, nr_prefetched_words); - lf_printf (file, ")"); - if (!is_function_definition) - { - lf_printf (file, ";"); - } - lf_printf (file, "\n"); - } - if (options.gen.code == generate_jumps && is_function_definition) - { - lf_indent (file, -1); - lf_print_table_name (file, table); - lf_printf (file, ":\n"); - lf_indent (file, +1); - } -} - - -static void -idecode_declare_if_switch (lf *file, gen_entry *table, int depth, void *data) -{ - 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 */ - && table->parent->opcode_rule->gen == array_gen) - { - print_idecode_switch_function_header (file, - table, - 0 /*isnt function definition */ , - 0); - } -} - - -static void -idecode_expand_if_switch (lf *file, gen_entry *table, int depth, void *data) -{ - 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 */ - && table->parent->opcode_rule->gen == array_gen) - { - print_idecode_switch_function_header (file, - table, - 1 /*is function definition */ , - 0); - if (options.gen.code == generate_calls) - { - lf_printf (file, "{\n"); - lf_indent (file, +2); - } - print_idecode_switch (file, table, "return"); - if (options.gen.code == generate_calls) - { - lf_indent (file, -2); - lf_printf (file, "}\n"); - } - } -} - - -/****************************************************************/ - - -void -print_idecode_lookups (lf *file, gen_entry *table, cache_entry *cache_rules) -{ - int depth; - - /* output switch function declarations where needed by tables */ - gen_entry_traverse_tree (file, table, 1, idecode_declare_if_switch, /* START */ - NULL, NULL, NULL); - - /* output tables where needed */ - for (depth = gen_entry_depth (table); depth > 0; depth--) - { - gen_entry_traverse_tree (file, table, - 1 - depth, - print_idecode_table_start, - print_idecode_table_leaf, - print_idecode_table_end, NULL); - } - - /* output switch functions where needed */ - gen_entry_traverse_tree (file, table, 1, idecode_expand_if_switch, /* START */ - NULL, NULL, NULL); -} - - -void -print_idecode_body (lf *file, gen_entry *table, const char *result) -{ - if (table->opcode_rule->gen == switch_gen - || table->opcode_rule->gen == goto_switch_gen - || table->opcode_rule->gen == padded_switch_gen) - { - print_idecode_switch (file, table, result); - } - else - { - print_idecode_table (file, table, result); - } -} - - -/****************************************************************/ - -#if 0 -static void -print_jump (lf *file, int is_tail) -{ - if (is_tail) - { - lf_putstr (file, "if (keep_running != NULL && !*keep_running)\n"); - lf_putstr (file, " cpu_halt(cpu, nia, was_continuing, 0/*na*/);\n"); - } - - if (!options.generate_smp) - { - lf_putstr (file, "if (WITH_EVENTS) {\n"); - lf_putstr (file, " if (event_queue_tick(events)) {\n"); - lf_putstr (file, " cpu_set_program_counter(cpu, nia);\n"); - lf_putstr (file, " event_queue_process(events);\n"); - lf_putstr (file, " nia = cpu_get_program_counter(cpu);\n"); - lf_putstr (file, " }\n"); - lf_putstr (file, "}\n"); - } - - if (options.generate_smp) - { - if (is_tail) - { - lf_putstr (file, "cpu_set_program_counter(cpu, nia);\n"); - } - lf_putstr (file, "if (WITH_EVENTS) {\n"); - lf_putstr (file, " current_cpu += 1;\n"); - lf_putstr (file, " if (current_cpu >= nr_cpus) {\n"); - lf_putstr (file, " if (event_queue_tick(events)) {\n"); - lf_putstr (file, " event_queue_process(events);\n"); - lf_putstr (file, " }\n"); - lf_putstr (file, " current_cpu = 0;\n"); - lf_putstr (file, " }\n"); - lf_putstr (file, "}\n"); - lf_putstr (file, "else {\n"); - lf_putstr (file, " current_cpu = (current_cpu + 1) % nr_cpus;\n"); - lf_putstr (file, "}\n"); - lf_putstr (file, "cpu = cpus[current_cpu];\n"); - lf_putstr (file, "nia = cpu_get_program_counter(cpu);\n"); - } - - if (options.gen.icache) - { - lf_putstr (file, "cache_entry = cpu_icache_entry(cpu, nia);\n"); - lf_putstr (file, "if (cache_entry->address == nia) {\n"); - lf_putstr (file, " /* cache hit */\n"); - lf_putstr (file, " goto *cache_entry->semantic;\n"); - lf_putstr (file, "}\n"); - if (is_tail) - { - lf_putstr (file, "goto cache_miss;\n"); - } - } - - if (!options.gen.icache && is_tail) - { - lf_printf (file, "goto idecode;\n"); - } - -} -#endif - - - -#if 0 -static void -print_jump_insn (lf *file, - insn_entry * instruction, - insn_bits * expanded_bits, - opcode_field *opcodes, cache_entry *cache_rules) -{ - - /* what we are for the moment */ - lf_printf (file, "\n"); - print_my_defines (file, expanded_bits, instruction->name); - - /* output the icache entry */ - if (options.gen.icache) - { - lf_printf (file, "\n"); - lf_indent (file, -1); - print_function_name (file, - instruction->name, - expanded_bits, function_name_prefix_icache); - lf_printf (file, ":\n"); - lf_indent (file, +1); - lf_printf (file, "{\n"); - lf_indent (file, +2); - lf_putstr (file, "const unsigned_word cia = nia;\n"); - print_itrace (file, instruction, 1 /*putting-value-in-cache */ ); - print_idecode_validate (file, instruction, opcodes); - lf_printf (file, "\n"); - lf_printf (file, "{\n"); - lf_indent (file, +2); - print_icache_body (file, instruction, expanded_bits, cache_rules, 0, /*use_defines */ - put_values_in_icache); - lf_printf (file, "cache_entry->address = nia;\n"); - lf_printf (file, "cache_entry->semantic = &&"); - print_function_name (file, - instruction->name, - expanded_bits, function_name_prefix_semantics); - lf_printf (file, ";\n"); - if (options.gen.semantic_icache) - { - print_semantic_body (file, instruction, expanded_bits, opcodes); - print_jump (file, 1 /*is-tail */ ); - } - else - { - lf_printf (file, "/* goto "); - print_function_name (file, - instruction->name, - expanded_bits, function_name_prefix_semantics); - lf_printf (file, "; */\n"); - } - lf_indent (file, -2); - lf_putstr (file, "}\n"); - lf_indent (file, -2); - lf_printf (file, "}\n"); - } - - /* print the semantics */ - lf_printf (file, "\n"); - lf_indent (file, -1); - print_function_name (file, - instruction->name, - expanded_bits, function_name_prefix_semantics); - lf_printf (file, ":\n"); - lf_indent (file, +1); - lf_printf (file, "{\n"); - lf_indent (file, +2); - lf_putstr (file, "const unsigned_word cia = nia;\n"); - print_icache_body (file, - instruction, - expanded_bits, - cache_rules, - (options.gen.direct_access - ? define_variables - : declare_variables), - (options.gen.icache - ? get_values_from_icache : do_not_use_icache)); - print_semantic_body (file, instruction, expanded_bits, opcodes); - if (options.gen.direct_access) - print_icache_body (file, - instruction, - expanded_bits, - cache_rules, - undef_variables, - (options.gen.icache - ? get_values_from_icache : do_not_use_icache)); - print_jump (file, 1 /*is tail */ ); - lf_indent (file, -2); - lf_printf (file, "}\n"); -} -#endif - - -#if 0 -static void -print_jump_definition (lf *file, - gen_entry *entry, - insn_entry * insn, int depth, void *data) -{ - cache_entry *cache_rules = (cache_entry *) data; - if (options.generate_expanded_instructions) - { - ASSERT (entry->nr_insns == 1 - && entry->opcode == NULL - && entry->parent != NULL && entry->parent->opcode != NULL); - ASSERT (entry->nr_insns == 1 - && entry->opcode == NULL - && entry->parent != NULL - && entry->parent->opcode != NULL - && entry->parent->opcode_rule != NULL); - print_jump_insn (file, - entry->insns->words[0]->insn, - entry->expanded_bits, entry->opcode, cache_rules); - } - else - { - print_jump_insn (file, - instruction->words[0]->insn, NULL, NULL, cache_rules); - } -} -#endif - -#if 0 -static void -print_jump_internal_function (lf *file, - gen_entry *table, - function_entry * function, void *data) -{ - if (function->is_internal) - { - lf_printf (file, "\n"); - lf_print__line_ref (file, function->line); - lf_indent (file, -1); - print_function_name (file, - function->name, - NULL, - (options.gen.icache - ? function_name_prefix_icache - : function_name_prefix_semantics)); - lf_printf (file, ":\n"); - lf_indent (file, +1); - lf_printf (file, "{\n"); - lf_indent (file, +2); - lf_printf (file, "const unsigned_word cia = nia;\n"); - table_print_code (file, function->code); - lf_print__internal_ref (file); - print_sim_engine_abort (file, "Internal function must longjump"); - lf_indent (file, -2); - lf_printf (file, "}\n"); - } -} -#endif - - - -#if 0 -static void -print_jump_until_stop_body (lf *file, - insn_table *table, cache_table * cache_rules) -{ - lf_printf (file, "{\n"); - lf_indent (file, +2); - lf_putstr (file, "jmp_buf halt;\n"); - lf_putstr (file, "jmp_buf restart;\n"); - lf_putstr (file, "sim_cpu *cpu = NULL;\n"); - lf_putstr (file, "unsigned_word nia = -1;\n"); - lf_putstr (file, "instruction_word instruction = 0;\n"); - if ((code & generate_with_icache)) - { - lf_putstr (file, "idecode_cache *cache_entry = NULL;\n"); - } - if (generate_smp) - { - lf_putstr (file, "int current_cpu = -1;\n"); - } - - /* all the switches and tables - they know about jumping */ - print_idecode_lookups (file, table, cache_rules); - - /* start the simulation up */ - if ((code & generate_with_icache)) - { - lf_putstr (file, "\n"); - lf_putstr (file, "{\n"); - lf_putstr (file, " int cpu_nr;\n"); - lf_putstr (file, " for (cpu_nr = 0; cpu_nr < nr_cpus; cpu_nr++)\n"); - lf_putstr (file, " cpu_flush_icache(cpus[cpu_nr]);\n"); - lf_putstr (file, "}\n"); - } - - lf_putstr (file, "\n"); - lf_putstr (file, "psim_set_halt_and_restart(system, &halt, &restart);\n"); - - lf_putstr (file, "\n"); - lf_putstr (file, "if (setjmp(halt))\n"); - lf_putstr (file, " return;\n"); - - lf_putstr (file, "\n"); - lf_putstr (file, "setjmp(restart);\n"); - - lf_putstr (file, "\n"); - if (!generate_smp) - { - lf_putstr (file, "cpu = cpus[0];\n"); - lf_putstr (file, "nia = cpu_get_program_counter(cpu);\n"); - } - else - { - lf_putstr (file, "current_cpu = psim_last_cpu(system);\n"); - } - - if (!(code & generate_with_icache)) - { - lf_printf (file, "\n"); - lf_indent (file, -1); - lf_printf (file, "idecode:\n"); - lf_indent (file, +1); - } - - print_jump (file, 0 /*is_tail */ ); - - if ((code & generate_with_icache)) - { - lf_indent (file, -1); - lf_printf (file, "cache_miss:\n"); - lf_indent (file, +1); - } - - lf_putstr (file, "instruction\n"); - lf_putstr (file, " = vm_instruction_map_read(cpu_instruction_map(cpu),\n"); - lf_putstr (file, " cpu, nia);\n"); - print_idecode_body (file, table, "/*IGORE*/"); - - /* print out a table of all the internals functions */ - insn_table_traverse_function (table, - file, NULL, print_jump_internal_function); - - /* print out a table of all the instructions */ - if (generate_expanded_instructions) - insn_table_traverse_tree (table, file, cache_rules, 1, NULL, /* start */ - print_jump_definition, /* leaf */ - NULL, /* end */ - NULL); /* padding */ - else - insn_table_traverse_insn (table, - file, cache_rules, print_jump_definition); - lf_indent (file, -2); - lf_printf (file, "}\n"); -} -#endif - -/****************************************************************/ - - - -/* Output code to do any final checks on the decoded instruction. - This includes things like verifying any on decoded fields have the - correct value and checking that (for floating point) floating point - hardware isn't disabled */ - -void -print_idecode_validate (lf *file, - insn_entry * instruction, insn_opcodes *opcode_paths) -{ - /* Validate: unchecked instruction fields - - If any constant fields in the instruction were not checked by the - idecode tables, output code to check that they have the correct - value here */ - { - int nr_checks = 0; - int word_nr; - lf_printf (file, "\n"); - lf_indent_suppress (file); - lf_printf (file, "#if defined (WITH_RESERVED_BITS)\n"); - lf_printf (file, "/* validate: "); - print_insn_words (file, instruction); - lf_printf (file, " */\n"); - for (word_nr = 0; word_nr < instruction->nr_words; word_nr++) - { - insn_uint check_mask = 0; - insn_uint check_val = 0; - insn_word_entry *word = instruction->word[word_nr]; - int bit_nr; - - /* form check_mask/check_val containing what needs to be checked - in the instruction */ - for (bit_nr = 0; bit_nr < options.insn_bit_size; bit_nr++) - { - insn_bit_entry *bit = word->bit[bit_nr]; - insn_field_entry *field = bit->field; - - /* Make space for the next bit */ - check_mask <<= 1; - check_val <<= 1; - - /* Only need to validate constant (and reserved) - bits. Skip any others */ - if (field->type != insn_field_int - && field->type != insn_field_reserved) - continue; - - /* Look through the list of opcode paths that lead to this - instruction. See if any have failed to check the - relevant bit */ - if (opcode_paths != NULL) - { - insn_opcodes *entry; - for (entry = opcode_paths; entry != NULL; entry = entry->next) - { - opcode_field *opcode; - for (opcode = entry->opcode; - opcode != NULL; opcode = opcode->parent) - { - if (opcode->word_nr == word_nr - && opcode->first <= bit_nr - && opcode->last >= bit_nr) - /* we've decoded on this bit */ - break; - } - if (opcode == NULL) - /* the bit wasn't decoded on */ - break; - } - if (entry == NULL) - /* all the opcode paths decoded on BIT_NR, no need - to check it */ - continue; - } - - check_mask |= 1; - check_val |= bit->value; - } - - /* if any bits not checked by opcode tables, output code to check them */ - if (check_mask) - { - if (nr_checks == 0) - { - lf_printf (file, "if (WITH_RESERVED_BITS)\n"); - lf_printf (file, " {\n"); - lf_indent (file, +4); - } - nr_checks++; - if (options.insn_bit_size > 32) - { - lf_printf (file, "if ((instruction_%d\n", word_nr); - lf_printf (file, " & UNSIGNED64 (0x%08lx%08lx))\n", - (unsigned long) (check_mask >> 32), - (unsigned long) (check_mask)); - lf_printf (file, " != UNSIGNED64 (0x%08lx%08lx))\n", - (unsigned long) (check_val >> 32), - (unsigned long) (check_val)); - } - else - { - lf_printf (file, - "if ((instruction_%d & 0x%08lx) != 0x%08lx)\n", - word_nr, (unsigned long) (check_mask), - (unsigned long) (check_val)); - } - lf_indent (file, +2); - print_idecode_invalid (file, "return", invalid_illegal); - lf_indent (file, -2); - } - } - if (nr_checks > 0) - { - lf_indent (file, -4); - lf_printf (file, " }\n"); - } - lf_indent_suppress (file); - lf_printf (file, "#endif\n"); - } - - /* Validate: Floating Point hardware - - If the simulator is being built with out floating point hardware - (different to it being disabled in the MSR) then floating point - instructions are invalid */ - { - if (filter_is_member (instruction->flags, "f")) - { - lf_printf (file, "\n"); - lf_indent_suppress (file); - lf_printf (file, "#if defined(CURRENT_FLOATING_POINT)\n"); - lf_printf (file, "/* Validate: FP hardware exists */\n"); - lf_printf (file, - "if (CURRENT_FLOATING_POINT != HARD_FLOATING_POINT) {\n"); - lf_indent (file, +2); - print_idecode_invalid (file, "return", invalid_illegal); - lf_indent (file, -2); - lf_printf (file, "}\n"); - lf_indent_suppress (file); - lf_printf (file, "#endif\n"); - } - } - - /* Validate: Floating Point available - - If floating point is not available, we enter a floating point - unavailable interrupt into the cache instead of the instruction - proper. - - The PowerPC spec requires a CSI after MSR[FP] is changed and when - ever a CSI occures we flush the instruction cache. */ - - { - if (filter_is_member (instruction->flags, "f")) - { - lf_printf (file, "\n"); - lf_indent_suppress (file); - lf_printf (file, "#if defined(IS_FP_AVAILABLE)\n"); - lf_printf (file, "/* Validate: FP available according to cpu */\n"); - lf_printf (file, "if (!IS_FP_AVAILABLE) {\n"); - lf_indent (file, +2); - print_idecode_invalid (file, "return", invalid_fp_unavailable); - lf_indent (file, -2); - lf_printf (file, "}\n"); - lf_indent_suppress (file); - lf_printf (file, "#endif\n"); - } - } - - /* Validate: Validate Instruction in correct slot - - Some architectures place restrictions on the slot that an - instruction can be issued in */ - - { - if (filter_is_member (instruction->options, "s") - || options.gen.slot_verification) - { - lf_printf (file, "\n"); - lf_indent_suppress (file); - lf_printf (file, "#if defined(IS_WRONG_SLOT)\n"); - lf_printf (file, - "/* Validate: Instruction issued in correct slot */\n"); - lf_printf (file, "if (IS_WRONG_SLOT) {\n"); - lf_indent (file, +2); - print_idecode_invalid (file, "return", invalid_wrong_slot); - lf_indent (file, -2); - lf_printf (file, "}\n"); - lf_indent_suppress (file); - lf_printf (file, "#endif\n"); - } - } - -} - - -/****************************************************************/ - - -void -print_idecode_issue_function_header (lf *file, - const char *processor, - function_decl_type decl_type, - int nr_prefetched_words) -{ - int indent; - lf_printf (file, "\n"); - switch (decl_type) - { - case is_function_declaration: - lf_print__function_type_function (file, print_semantic_function_type, - "INLINE_IDECODE", " "); - break; - case is_function_definition: - lf_print__function_type_function (file, print_semantic_function_type, - "INLINE_IDECODE", "\n"); - break; - case is_function_variable: - print_semantic_function_type (file); - lf_printf (file, " (*"); - break; - } - indent = print_function_name (file, - "issue", - NULL, - processor, - NULL, function_name_prefix_idecode); - switch (decl_type) - { - case is_function_definition: - indent += lf_printf (file, " ("); - break; - case is_function_declaration: - lf_putstr (file, "\n("); - indent = 1; - break; - case is_function_variable: - lf_putstr (file, ")\n("); - indent = 1; - break; - } - lf_indent (file, +indent); - print_semantic_function_formal (file, nr_prefetched_words); - lf_putstr (file, ")"); - lf_indent (file, -indent); - switch (decl_type) - { - case is_function_definition: - lf_printf (file, "\n"); - break; - case is_function_declaration: - case is_function_variable: - lf_putstr (file, ";\n"); - break; - } -} - - - -void -print_idecode_globals (lf *file) -{ - lf_printf (file, "enum {\n"); - lf_printf (file, " /* greater or equal to zero => table */\n"); - lf_printf (file, " function_entry = -1,\n"); - lf_printf (file, " boolean_entry = -2,\n"); - lf_printf (file, "};\n"); - lf_printf (file, "\n"); - lf_printf (file, "typedef struct _idecode_table_entry {\n"); - lf_printf (file, " int shift;\n"); - lf_printf (file, " unsigned%d mask;\n", options.insn_bit_size); - lf_printf (file, " unsigned%d value;\n", options.insn_bit_size); - lf_printf (file, " void *function_or_table;\n"); - lf_printf (file, "} idecode_table_entry;\n"); -} |