diff options
Diffstat (limited to 'sim/igen/gen-idecode.c')
| -rw-r--r-- | sim/igen/gen-idecode.c | 1380 |
1 files changed, 0 insertions, 1380 deletions
diff --git a/sim/igen/gen-idecode.c b/sim/igen/gen-idecode.c deleted file mode 100644 index 96606fa..0000000 --- a/sim/igen/gen-idecode.c +++ /dev/null @@ -1,1380 +0,0 @@ -/* This file is part of the program psim. - - Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au> - - 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 "ld-decode.h" -#include "ld-cache.h" -#include "ld-insn.h" - -#include "igen.h" - -#include "gen-idecode.h" -#include "gen-icache.h" -#include "gen-semantics.h" - - - -static void -lf_print_opcodes(lf *file, - insn_table *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; - } - } -} - -/****************************************************************/ - -void -error_leaf_contains_multiple_insn(insn_table *entry) -{ - insn *i; - ASSERT(entry->opcode == NULL && entry->nr_insn > 1); - for (i = entry->insns; i != NULL; i = i->next) { - fprintf(stderr, "%s:%d: %s %s\n", - i->file_entry->file_name, - i->file_entry->line_nr, - i->file_entry->fields[insn_name], - (i == entry->insns - ? "was not uniquely decoded" - : "decodes to the same entry")); - } - error(""); -} - -/****************************************************************/ - - -static void -lf_print_table_name(lf *file, - insn_table *table) -{ - lf_printf(file, "idecode_table"); - lf_print_opcodes(file, table); -} - - - -static void -print_idecode_table(lf *file, - insn_table *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", - insn_bit_size, - i2target(hi_bit_nr, entry->opcode->first), - i2target(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 ((code & generate_jumps)) { - lf_printf(file, "goto *table_entry->function_or_table;\n"); - } - else { - lf_printf(file, "%s ", result); - if ((code & generate_with_icache)) { - lf_printf(file, "(((idecode_icache*)table_entry->function_or_table)\n"); - lf_printf(file, " ("); - print_icache_function_actual(file); - lf_printf(file, "));\n"); - } - else { - lf_printf(file, "((idecode_semantic*)table_entry->function_or_table)\n"); - lf_printf(file, " ("); - print_semantic_function_actual(file); - lf_printf(file, ");\n"); - } - } -} - - -static void -print_idecode_table_start(insn_table *table, - lf *file, - void *data, - int depth) -{ - 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(insn_table *entry, - lf *file, - void *data, - insn *instruction, - int depth) -{ - ASSERT(entry->parent != NULL); - ASSERT(depth == 0); - - /* 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) { - if (entry->nr_insn != 1) { - error_leaf_contains_multiple_insn(entry); - } - /* table leaf entry */ - lf_printf(file, "function_entry, 0, 0, "); - if ((code & generate_jumps)) - lf_printf(file, "&&"); - print_function_name(file, - entry->insns->file_entry->fields[insn_name], - entry->expanded_bits, - ((code & generate_with_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 ((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(hi_bit_nr, entry->opcode->first), - i2target(hi_bit_nr, entry->opcode->last)); - lf_printf(file, "INSERTED32(%d, %d, %d), ", - entry->opcode->boolean_constant, - i2target(hi_bit_nr, entry->opcode->first), - i2target(hi_bit_nr, entry->opcode->last)); - lf_print_table_name(file, entry); - } - else { - /* table `calling' another table */ - lf_printf(file, "%d, ", insn_bit_size - entry->opcode->last - 1); - lf_printf(file, "MASK%d(%d,%d), ", - insn_bit_size, - i2target(hi_bit_nr, entry->opcode->first), - i2target(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(insn_table *table, - lf *file, - void *data, - int depth) -{ - ASSERT(depth == 0); - if (table->opcode_rule->gen == array_gen) { - lf_printf(file, "};\n"); - } -} - -static void -print_idecode_table_padding(insn_table *table, - lf *file, - void *data, - int depth, - int opcode_nr) -{ - ASSERT(depth == 0); - if (table->opcode_rule->gen == array_gen) { - lf_printf(file, " /*%d*/ { function_entry, 0, 0, ", opcode_nr); - if ((code & generate_jumps)) - lf_printf(file, "&&"); - lf_printf(file, "%s_illegal },\n", - ((code & generate_with_icache) ? "icache" : "semantic")); - } -} - - -/****************************************************************/ - - -static void -print_goto_switch_name(lf *file, - insn_table *entry) -{ - lf_printf(file, "case_"); - if (entry->opcode == NULL) - print_function_name(file, - entry->insns->file_entry->fields[insn_name], - entry->expanded_bits, - ((code & generate_with_icache) - ? function_name_prefix_icache - : function_name_prefix_semantics)); - else - lf_print_table_name(file, entry); -} - -static void -print_goto_switch_table_leaf(insn_table *entry, - lf *file, - void *data, - insn *instruction, - int depth) -{ - ASSERT(entry->parent != NULL); - ASSERT(depth == 0); - ASSERT(entry->parent->opcode_rule->gen == goto_switch_gen); - ASSERT(entry->parent->opcode); - - lf_printf(file, "&&"); - print_goto_switch_name(file, entry); - lf_printf(file, ",\n"); -} - -static void -print_goto_switch_table_padding(insn_table *table, - lf *file, - void *data, - int depth, - int opcode_nr) -{ - ASSERT(depth == 0); - ASSERT(table->opcode_rule->gen == goto_switch_gen); - - lf_printf(file, "&&illegal_"); - lf_print_table_name(file, table); - lf_printf(file, ",\n"); -} - -static void -print_goto_switch_break(lf *file, - insn_table *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, - insn_table *table) -{ - lf_printf(file, "const static void *"); - lf_print_table_name(file, table); - lf_printf(file, "[] = {\n"); - lf_indent(file, +2); - insn_table_traverse_tree(table, - file, NULL/*data*/, - 0, - NULL/*start*/, - print_goto_switch_table_leaf, - NULL/*end*/, - print_goto_switch_table_padding); - lf_indent(file, -2); - lf_printf(file, "};\n"); -} - - -void print_idecode_switch -(lf *file, - insn_table *table, - const char *result); - -static void -print_idecode_switch_start(insn_table *table, - lf *file, - void *data, - int depth) -{ - /* 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)) {\n", - insn_bit_size, - i2target(hi_bit_nr, table->opcode->first), - i2target(hi_bit_nr, table->opcode->last)); - } - 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)\n", - insn_bit_size, - i2target(hi_bit_nr, table->opcode->first), - i2target(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)];\n", - insn_bit_size, - i2target(hi_bit_nr, table->opcode->first), - i2target(hi_bit_nr, table->opcode->last)); - } - else { - ASSERT("bad switch" == NULL); - } -} - - -static void -print_idecode_switch_leaf(insn_table *entry, - lf *file, - void *data, - insn *instruction, - int depth) -{ - 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); - - if (entry->parent->opcode->is_boolean - && entry->opcode_nr == 0) { - /* 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) { - /* 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) { - /* normal goto */ - lf_printf(file, "case %d:\n", entry->opcode_nr); - } - else if (entry->parent->opcode_rule->gen == goto_switch_gen) { - /* lf_indent(file, -1); */ - print_goto_switch_name(file, entry); - lf_printf(file, ":\n"); - /* lf_indent(file, +1); */ - } - else { - ASSERT("bad switch" == NULL); - } - lf_indent(file, +2); - { - if (entry->opcode == NULL) { - /* switch calling leaf */ - if (entry->nr_insn != 1) { - error_leaf_contains_multiple_insn(entry); - } - if ((code & generate_jumps)) - lf_printf(file, "goto "); - if ((code & generate_calls)) - lf_printf(file, "%s ", result); - print_function_name(file, - entry->insns->file_entry->fields[insn_name], - entry->expanded_bits, - ((code & generate_with_icache) - ? function_name_prefix_icache - : function_name_prefix_semantics)); - if ((code & generate_calls)) { - lf_printf(file, "("); - print_semantic_function_actual(file); - 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 */ - print_idecode_switch(file, entry, result); - } - else { - /* switch looking up a table */ - lf_printf(file, "{\n"); - lf_indent(file, -2); - 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 { - ASSERT("bad switch" == NULL); - } - } - lf_indent(file, -2); -} - - -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(insn_table *table, - lf *file, - void *data, - int depth) -{ - 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"); - } - else if (table->opcode_rule->gen == switch_gen - || table->opcode_rule->gen == padded_switch_gen) { - lf_printf(file, "default:\n"); - switch (table->opcode_rule->gen) { - case switch_gen: - print_idecode_switch_illegal(file, result); - break; - case padded_switch_gen: - lf_printf(file, " error(\"Internal error - bad switch generated\\n\");\n"); - lf_printf(file, " break;\n"); - break; - default: - ASSERT("bad switch" == NULL); - } - lf_printf(file, "}\n"); - } - 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 { - ASSERT("bad switch" == NULL); - } -} - -static void -print_idecode_switch_padding(insn_table *table, - lf *file, - void *data, - int depth, - int opcode_nr) -{ - 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); - - switch (table->opcode_rule->gen) { - case switch_gen: - break; - case padded_switch_gen: - lf_printf(file, "case %d:\n", opcode_nr); - print_idecode_switch_illegal(file, result); - break; - case goto_switch_gen: - /* no padding needed */ - break; - default: - ASSERT("bad switch" != NULL); - } -} - - -void -print_idecode_switch(lf *file, - insn_table *table, - const char *result) -{ - insn_table_traverse_tree(table, - file, (void*)result, - 0, - print_idecode_switch_start, - print_idecode_switch_leaf, - print_idecode_switch_end, - print_idecode_switch_padding); -} - - -static void -print_idecode_switch_function_header(lf *file, - insn_table *table, - int is_function_definition) -{ - lf_printf(file, "\n"); - if ((code & generate_calls)) { - lf_printf(file, "static "); - if ((code & generate_with_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); - lf_printf(file, ")"); - if (!is_function_definition) - lf_printf(file, ";"); - lf_printf(file, "\n"); - } - if ((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(insn_table *table, - lf *file, - void *data, - int depth) -{ - 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*/); - } -} - - -static void -idecode_expand_if_switch(insn_table *table, - lf *file, - void *data, - int depth) -{ - 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*/); - if ((code & generate_calls)) { - lf_printf(file, "{\n"); - lf_indent(file, +2); - } - print_idecode_switch(file, table, "return"); - if ((code & generate_calls)) { - lf_indent(file, -2); - lf_printf(file, "}\n"); - } - } -} - - -/****************************************************************/ - - -static void -print_idecode_lookups(lf *file, - insn_table *table, - cache_table *cache_rules) -{ - int depth; - - /* output switch function declarations where needed by tables */ - insn_table_traverse_tree(table, - file, NULL, - 1, - idecode_declare_if_switch, /* START */ - NULL, NULL, NULL); - - /* output tables where needed */ - for (depth = insn_table_depth(table); - depth > 0; - depth--) { - insn_table_traverse_tree(table, - file, NULL, - 1-depth, - print_idecode_table_start, - print_idecode_table_leaf, - print_idecode_table_end, - print_idecode_table_padding); - } - - /* output switch functions where needed */ - insn_table_traverse_tree(table, - file, NULL, - 1, - idecode_expand_if_switch, /* START */ - NULL, NULL, NULL); -} - - -static void -print_idecode_body(lf *file, - insn_table *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); -} - - -/****************************************************************/ - - -static void -print_idecode_issue_function_body(lf *file, - insn_table *table, - int can_stop) -{ - lf_printf(file, "{\n"); - lf_indent(file, +2); - lf_printf(file, "%sinstruction_address nia;\n", global_name_prefix); - if (!(code & generate_with_icache)) { - print_idecode_body(file, table, "nia =");; - } - else { - error("FIXME - idecode with cache?\n"); - lf_putstr(file, "idecode_cache *cache_entry =\n"); - lf_putstr(file, " cpu_icache_entry(cpu, cia);\n"); - lf_putstr(file, "if (cache_entry->address == cia) {\n"); - lf_putstr(file, " /* cache hit */\n"); - lf_putstr(file, " idecode_semantic *const semantic = cache_entry->semantic;\n"); - lf_putstr(file, " cia = semantic(cpu, cache_entry, cia);\n"); - /* tail */ - if (can_stop) { - lf_putstr(file, "if (keep_running != NULL && !*keep_running)\n"); - lf_putstr(file, " cpu_halt(cpu, cia, was_continuing, 0/*ignore*/);\n"); - } - lf_putstr(file, "}\n"); - lf_putstr(file, "else {\n"); - lf_putstr(file, " /* cache miss */\n"); - if (!(code & generate_with_semantic_icache)) { - lf_indent(file, +2); - lf_putstr(file, "idecode_semantic *semantic;\n"); - lf_indent(file, -2); - } - lf_putstr(file, " instruction_word instruction =\n"); - lf_putstr(file, " vm_instruction_map_read(cpu_instruction_map(cpu), cpu, cia);\n"); - lf_putstr(file, " if (WITH_MON != 0)\n"); - lf_putstr(file, " mon_event(mon_event_icache_miss, cpu, cia);\n"); - if ((code & generate_with_semantic_icache)) { - lf_putstr(file, "{\n"); - lf_indent(file, +2); - print_idecode_body(file, table, "cia ="); - lf_indent(file, -2); - lf_putstr(file, "}\n"); - } - else { - print_idecode_body(file, table, "semantic ="); - lf_putstr(file, " cia = semantic(cpu, cache_entry, cia);\n"); - } - lf_putstr(file, "}\n"); - } - lf_printf(file, "return nia;\n"); - lf_indent(file, -2); - lf_printf(file, "}\n"); -} - - -/****************************************************************/ - -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 (!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 (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 ((code & generate_with_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 (!(code & generate_with_icache) && is_tail) { - lf_printf(file, "goto idecode;\n"); - } - -} - - - - - -static void -print_jump_insn(lf *file, - insn *instruction, - insn_bits *expanded_bits, - opcode_field *opcodes, - cache_table *cache_rules) -{ - - /* what we are for the moment */ - lf_printf(file, "\n"); - print_my_defines(file, expanded_bits, instruction->file_entry); - - /* output the icache entry */ - if ((code & generate_with_icache)) { - lf_printf(file, "\n"); - lf_indent(file, -1); - print_function_name(file, - instruction->file_entry->fields[insn_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->file_entry, 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->file_entry->fields[insn_name], - expanded_bits, - function_name_prefix_semantics); - lf_printf(file, ";\n"); - if ((code & generate_with_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->file_entry->fields[insn_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->file_entry->fields[insn_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, - ((code & generate_with_direct_access) - ? define_variables - : declare_variables), - ((code & generate_with_icache) - ? get_values_from_icache - : do_not_use_icache)); - print_semantic_body(file, - instruction, - expanded_bits, - opcodes); - if (code & generate_with_direct_access) - print_icache_body(file, - instruction, - expanded_bits, - cache_rules, - undef_variables, - ((code & generate_with_icache) - ? get_values_from_icache - : do_not_use_icache)); - print_jump(file, 1/*is tail*/); - lf_indent(file, -2); - lf_printf(file, "}\n"); -} - -static void -print_jump_definition(insn_table *entry, - lf *file, - void *data, - insn *instruction, - int depth) -{ - cache_table *cache_rules = (cache_table*)data; - if (generate_expanded_instructions) { - ASSERT(entry->nr_insn == 1 - && entry->opcode == NULL - && entry->parent != NULL - && entry->parent->opcode != NULL); - ASSERT(entry->nr_insn == 1 - && entry->opcode == NULL - && entry->parent != NULL - && entry->parent->opcode != NULL - && entry->parent->opcode_rule != NULL); - print_jump_insn(file, - entry->insns, - entry->expanded_bits, - entry->opcode, - cache_rules); - } - else { - print_jump_insn(file, - instruction, - NULL, - NULL, - cache_rules); - } -} - -static void -print_jump_internal_function(insn_table *table, - lf *file, - void *data, - table_entry *function) -{ - if (it_is("internal", function->fields[insn_flags])) { - lf_printf(file, "\n"); - table_entry_print_cpp_line_nr(file, function); - lf_indent(file, -1); - print_function_name(file, - function->fields[insn_name], - NULL, - ((code & generate_with_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"); - lf_print__c_code(file, function->annex); - lf_print__internal_reference(file); - lf_printf(file, "error(\"Internal function must longjump\\n\");\n"); - lf_indent(file, -2); - lf_printf(file, "}\n"); - } -} - -#ifdef UNUSED -static void -print_jump_until_stop_body(lf *file, - insn_table *table, - cache_table *cache_rules, - int can_stop) -{ - lf_printf(file, "{\n"); - lf_indent(file, +2); - if (!can_stop) - lf_printf(file, "int *keep_running = NULL;\n"); - 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 *instruction, - opcode_field *opcodes) -{ - /* 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 */ - { - insn_int check_mask = 0; - insn_int check_val = 0; - insn_field *field; - opcode_field *opcode; - - /* form check_mask/check_val containing what needs to be checked - in the instruction */ - for (field = instruction->fields->first; - field->first < insn_bit_size; - field = field->next) { - - check_mask <<= field->width; - check_val <<= field->width; - - /* is it a constant that could need validating? */ - if (!field->is_int && !field->is_reserved) - continue; - - /* has it been checked by a table? */ - for (opcode = opcodes; opcode != NULL; opcode = opcode->parent) { - if (field->first >= opcode->first - && field->last <= opcode->last) - break; - } - if (opcode != NULL) - continue; - - check_mask |= (1 << field->width)-1; - check_val |= field->val_int; - } - - /* if any bits not checked by opcode tables, output code to check them */ - if (check_mask) { - lf_printf(file, "\n"); - lf_indent_suppress(file); - lf_printf(file, "#if defined(WITH_RESERVED_BITS)\n"); - lf_printf(file, "/* validate: %s */\n", - instruction->file_entry->fields[insn_format]); - lf_printf(file, "if (WITH_RESERVED_BITS\n"); - if (insn_bit_size > 32) { - lf_printf(file, " && (instruction & 0x%08lx%08lxLL) != 0x%08lx%08lxLL) {\n", - (unsigned long)(check_mask >> 32), - (unsigned long)(check_mask), - (unsigned long)(check_val >> 32), - (unsigned long)(check_val)); - } - else { - lf_printf(file, " && (instruction & 0x%08lx) != 0x%08lx) {\n", - (unsigned long)(check_mask), - (unsigned long)(check_val)); - } - 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 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 (it_is("f", instruction->file_entry->fields[insn_flags])) { - 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 (it_is("f", instruction->file_entry->fields[insn_flags])) { - 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 (it_is("s", instruction->file_entry->fields[insn_options]) - || (code & generate_with_idecode_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"); - } - } - -} - - -/****************************************************************/ - - -static void -print_idecode_issue_function_header(lf *file, - int is_function_definition) -{ - int indent; - lf_printf(file, "\n"); - lf_print_function_type_function(file, print_semantic_function_type, "INLINE_IDECODE", - (is_function_definition ? "\n" : " ")); - indent = print_function_name(file, "issue", NULL, function_name_prefix_idecode); - if (is_function_definition) - lf_indent(file, +indent); - else - lf_putstr(file, "\n"); - lf_putstr(file, "("); - print_semantic_function_formal(file); - lf_putstr(file, ")"); - if (is_function_definition) - lf_indent(file, -indent); - else - lf_printf(file, ";"); - lf_printf(file, "\n"); -} - - -void -gen_idecode_h (lf *file, - insn_table *table, - cache_table *cache_rules) -{ - lf_printf(file, "typedef unsigned%d %sinstruction_word;\n", - insn_bit_size, global_name_prefix); - - if ((code & generate_with_semantic_delayed_branch)) - { - lf_printf (file, "typedef struct _%sinstruction_address {\n", - global_name_prefix); - lf_printf (file, " address_word ip; /* instruction pointer */\n"); - lf_printf (file, " address_word dp; /* delayed-slot pointer */\n"); - lf_printf (file, "} %sinstruction_address;\n", global_name_prefix); - } - else - { - lf_printf (file, "typedef address_word %sinstruction_address;\n", - global_name_prefix); - - } - lf_printf(file, "\n"); - print_icache_struct(table, cache_rules, file); - lf_printf(file, "\n"); - if ((code & generate_with_icache)) - { - error("FIXME - idecode with icache incomplete"); - } - else - { - print_idecode_issue_function_header(file, 0/*is definition*/); - } -} - - -static void -print_idecode_globals(lf *file, - insn_table *table, - cache_table *cache_rules) -{ - 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", insn_bit_size); - lf_printf(file, " unsigned%d value;\n", insn_bit_size); - lf_printf(file, " void *function_or_table;\n"); - lf_printf(file, "} idecode_table_entry;\n"); -} - - -void -gen_idecode_c(lf *file, - insn_table *table, - cache_table *cache_rules) -{ - /* the intro */ - lf_printf(file, "#include \"sim-main.h\"\n"); - lf_printf(file, "#include \"%sidecode.h\"\n", global_name_prefix); - lf_printf(file, "#include \"%ssemantics.h\"\n", global_name_prefix); - lf_printf(file, "#include \"%sicache.h\"\n", global_name_prefix); - lf_printf(file, "#include \"%ssupport.h\"\n", global_name_prefix); - lf_printf(file, "\n"); - lf_printf(file, "\n"); - - print_idecode_globals(file, table, cache_rules); - lf_printf(file, "\n"); - - if ((code & generate_calls)) { - - print_idecode_lookups(file, table, cache_rules); - - /* output the main idecode routine */ - if ((code & generate_with_icache)) { - error("FIXME - handle the icache"); - } - else { - print_idecode_issue_function_header(file, 1/*is definition*/); - print_idecode_issue_function_body(file, table, 0/* have stop argument */); - } - - } - else if ((code & generate_jumps)) { - - lf_printf(file, "/* this file is intentionally left blank - generating a jump engine */\n"); - - } - else { - error("Something is wrong!\n"); - } -} |