1305 lines
36 KiB
C
1305 lines
36 KiB
C
/* The IGEN simulator generator for GDB, the GNU Debugger.
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Copyright 2002, 2007, 2008 Free Software Foundation, Inc.
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Contributed by Andrew Cagney.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "misc.h"
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#include "lf.h"
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#include "table.h"
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#include "filter.h"
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#include "igen.h"
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#include "ld-insn.h"
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#include "ld-decode.h"
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#include "gen.h"
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#include "gen-idecode.h"
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#include "gen-icache.h"
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#include "gen-semantics.h"
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static void
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lf_print_opcodes (lf *file, gen_entry *table)
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{
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if (table !=NULL)
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{
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while (1)
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{
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ASSERT (table->opcode != NULL);
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lf_printf (file, "_%d_%d",
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table->opcode->first, table->opcode->last);
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if (table->parent == NULL)
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break;
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lf_printf (file, "__%d", table->opcode_nr);
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table = table->parent;
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}
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}
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}
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static void
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print_idecode_ifetch (lf *file,
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int previous_nr_prefetched_words,
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int current_nr_prefetched_words)
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{
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int word_nr;
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for (word_nr = previous_nr_prefetched_words;
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word_nr < current_nr_prefetched_words; word_nr++)
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{
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lf_printf (file,
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"instruction_word instruction_%d = IMEM%d_IMMED (cia, %d);\n",
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word_nr, options.insn_bit_size, word_nr);
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}
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}
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/****************************************************************/
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static void
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lf_print_table_name (lf *file, gen_entry *table)
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{
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lf_printf (file, "idecode_table");
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lf_print_opcodes (file, table);
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}
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static void
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print_idecode_table (lf *file, gen_entry *entry, const char *result)
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{
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lf_printf (file, "/* prime the search */\n");
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lf_printf (file, "idecode_table_entry *table = ");
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lf_print_table_name (file, entry);
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lf_printf (file, ";\n");
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lf_printf (file, "int opcode = EXTRACTED%d (instruction, %d, %d);\n",
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options.insn_bit_size,
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i2target (options.hi_bit_nr, entry->opcode->first),
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i2target (options.hi_bit_nr, entry->opcode->last));
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lf_printf (file, "idecode_table_entry *table_entry = table + opcode;\n");
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lf_printf (file, "\n");
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lf_printf (file, "/* iterate until a leaf */\n");
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lf_printf (file, "while (1) {\n");
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lf_printf (file, " signed shift = table_entry->shift;\n");
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lf_printf (file, "if (shift == function_entry) break;\n");
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lf_printf (file, " if (shift >= 0) {\n");
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lf_printf (file, " table = ((idecode_table_entry*)\n");
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lf_printf (file, " table_entry->function_or_table);\n");
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lf_printf (file, " opcode = ((instruction & table_entry->mask)\n");
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lf_printf (file, " >> shift);\n");
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lf_printf (file, " table_entry = table + opcode;\n");
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lf_printf (file, " }\n");
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lf_printf (file, " else {\n");
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lf_printf (file, " /* must be a boolean */\n");
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lf_printf (file, " ASSERT(table_entry->shift == boolean_entry);\n");
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lf_printf (file, " opcode = ((instruction & table_entry->mask)\n");
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lf_printf (file, " != table_entry->value);\n");
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lf_printf (file, " table = ((idecode_table_entry*)\n");
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lf_printf (file, " table_entry->function_or_table);\n");
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lf_printf (file, " table_entry = table + opcode;\n");
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lf_printf (file, " }\n");
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lf_printf (file, "}\n");
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lf_printf (file, "\n");
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lf_printf (file, "/* call the leaf code */\n");
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if (options.gen.code == generate_jumps)
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{
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lf_printf (file, "goto *table_entry->function_or_table;\n");
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}
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else
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{
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lf_printf (file, "%s ", result);
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if (options.gen.icache)
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{
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lf_printf (file,
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"(((idecode_icache*)table_entry->function_or_table)\n");
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lf_printf (file, " (");
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print_icache_function_actual (file, 1);
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lf_printf (file, "));\n");
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}
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else
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{
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lf_printf (file,
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"((idecode_semantic*)table_entry->function_or_table)\n");
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lf_printf (file, " (");
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print_semantic_function_actual (file, 1);
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lf_printf (file, ");\n");
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}
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}
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}
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static void
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print_idecode_table_start (lf *file, gen_entry *table, int depth, void *data)
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{
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ASSERT (depth == 0);
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/* start of the table */
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if (table->opcode_rule->gen == array_gen)
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{
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lf_printf (file, "\n");
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lf_printf (file, "static idecode_table_entry ");
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lf_print_table_name (file, table);
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lf_printf (file, "[] = {\n");
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}
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}
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static void
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print_idecode_table_leaf (lf *file, gen_entry *entry, int depth, void *data)
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{
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gen_entry *master_entry;
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ASSERT (entry->parent != NULL);
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ASSERT (depth == 0);
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if (entry->combined_parent == NULL)
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master_entry = entry;
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else
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master_entry = entry->combined_parent;
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/* add an entry to the table */
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if (entry->parent->opcode_rule->gen == array_gen)
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{
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lf_printf (file, " /*%d*/ { ", entry->opcode_nr);
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if (entry->opcode == NULL)
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{
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ASSERT (entry->nr_insns == 1);
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/* table leaf entry */
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lf_printf (file, "function_entry, 0, 0, ");
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if (options.gen.code == generate_jumps)
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{
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lf_printf (file, "&&");
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}
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print_function_name (file,
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entry->insns->insn->name,
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entry->insns->insn->format_name,
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NULL,
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master_entry->expanded_bits,
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(options.gen.icache
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? function_name_prefix_icache
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: function_name_prefix_semantics));
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}
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else if (entry->opcode_rule->gen == switch_gen
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|| entry->opcode_rule->gen == goto_switch_gen
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|| entry->opcode_rule->gen == padded_switch_gen)
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{
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/* table calling switch statement */
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lf_printf (file, "function_entry, 0, 0, ");
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if (options.gen.code == generate_jumps)
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{
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lf_printf (file, "&&");
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}
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lf_print_table_name (file, entry);
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}
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else if (entry->opcode->is_boolean)
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{
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/* table `calling' boolean table */
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lf_printf (file, "boolean_entry, ");
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lf_printf (file, "MASK32(%d, %d), ",
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i2target (options.hi_bit_nr, entry->opcode->first),
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i2target (options.hi_bit_nr, entry->opcode->last));
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lf_printf (file, "INSERTED32(%d, %d, %d), ",
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entry->opcode->boolean_constant,
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i2target (options.hi_bit_nr, entry->opcode->first),
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i2target (options.hi_bit_nr, entry->opcode->last));
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lf_print_table_name (file, entry);
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}
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else
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{
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/* table `calling' another table */
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lf_printf (file, "%d, ",
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options.insn_bit_size - entry->opcode->last - 1);
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lf_printf (file, "MASK%d(%d,%d), ", options.insn_bit_size,
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i2target (options.hi_bit_nr, entry->opcode->first),
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i2target (options.hi_bit_nr, entry->opcode->last));
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lf_printf (file, "0, ");
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lf_print_table_name (file, entry);
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}
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lf_printf (file, " },\n");
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}
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}
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static void
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print_idecode_table_end (lf *file, gen_entry *table, int depth, void *data)
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{
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ASSERT (depth == 0);
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if (table->opcode_rule->gen == array_gen)
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{
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lf_printf (file, "};\n");
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}
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}
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/****************************************************************/
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static void
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print_goto_switch_name (lf *file, gen_entry *entry)
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{
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lf_printf (file, "case_");
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if (entry->opcode == NULL)
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{
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print_function_name (file,
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entry->insns->insn->name,
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entry->insns->insn->format_name,
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NULL,
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entry->expanded_bits,
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(options.gen.icache
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? function_name_prefix_icache
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: function_name_prefix_semantics));
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}
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else
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{
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lf_print_table_name (file, entry);
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}
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}
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static void
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print_goto_switch_table_leaf (lf *file,
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gen_entry *entry, int depth, void *data)
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{
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ASSERT (entry->parent != NULL);
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ASSERT (depth == 0);
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ASSERT (entry->parent->opcode_rule->gen == goto_switch_gen);
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ASSERT (entry->parent->opcode);
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lf_printf (file, "/* %d */ &&", entry->opcode_nr);
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if (entry->combined_parent != NULL)
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print_goto_switch_name (file, entry->combined_parent);
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else
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print_goto_switch_name (file, entry);
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lf_printf (file, ",\n");
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}
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static void
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print_goto_switch_break (lf *file, gen_entry *entry)
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{
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lf_printf (file, "goto break_");
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lf_print_table_name (file, entry->parent);
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lf_printf (file, ";\n");
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}
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static void
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print_goto_switch_table (lf *file, gen_entry *table)
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{
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lf_printf (file, "const static void *");
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lf_print_table_name (file, table);
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lf_printf (file, "[] = {\n");
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lf_indent (file, +2);
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gen_entry_traverse_tree (file, table, 0, NULL /*start */ ,
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print_goto_switch_table_leaf, NULL /*end */ ,
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NULL /*data */ );
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lf_indent (file, -2);
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lf_printf (file, "};\n");
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}
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void print_idecode_switch (lf *file, gen_entry *table, const char *result);
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static void
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print_idecode_switch_start (lf *file, gen_entry *table, int depth, void *data)
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{
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/* const char *result = data; */
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ASSERT (depth == 0);
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ASSERT (table->opcode_rule->gen == switch_gen
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|| table->opcode_rule->gen == goto_switch_gen
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|| table->opcode_rule->gen == padded_switch_gen);
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if (table->opcode->is_boolean
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|| table->opcode_rule->gen == switch_gen
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|| table->opcode_rule->gen == padded_switch_gen)
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{
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lf_printf (file, "switch (EXTRACTED%d (instruction_%d, %d, %d))\n",
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options.insn_bit_size,
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table->opcode_rule->word_nr,
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i2target (options.hi_bit_nr, table->opcode->first),
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i2target (options.hi_bit_nr, table->opcode->last));
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lf_indent (file, +2);
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lf_printf (file, "{\n");
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}
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else if (table->opcode_rule->gen == goto_switch_gen)
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{
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if (table->parent != NULL
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&& (table->parent->opcode_rule->gen == switch_gen
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|| table->parent->opcode_rule->gen == goto_switch_gen
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|| table->parent->opcode_rule->gen == padded_switch_gen))
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{
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lf_printf (file, "{\n");
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lf_indent (file, +2);
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}
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print_goto_switch_table (file, table);
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lf_printf (file, "ASSERT (EXTRACTED%d (instruction_%d, %d, %d)\n",
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options.insn_bit_size,
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table->opcode->word_nr,
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i2target (options.hi_bit_nr, table->opcode->first),
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i2target (options.hi_bit_nr, table->opcode->last));
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lf_printf (file, " < (sizeof (");
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lf_print_table_name (file, table);
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lf_printf (file, ") / sizeof(void*)));\n");
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lf_printf (file, "goto *");
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lf_print_table_name (file, table);
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lf_printf (file, "[EXTRACTED%d (instruction_%d, %d, %d)];\n",
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options.insn_bit_size,
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table->opcode->word_nr,
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i2target (options.hi_bit_nr, table->opcode->first),
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i2target (options.hi_bit_nr, table->opcode->last));
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}
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else
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{
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ASSERT ("bad switch" == NULL);
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}
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}
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static void
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print_idecode_switch_leaf (lf *file, gen_entry *entry, int depth, void *data)
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{
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const char *result = data;
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ASSERT (entry->parent != NULL);
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ASSERT (depth == 0);
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ASSERT (entry->parent->opcode_rule->gen == switch_gen
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|| entry->parent->opcode_rule->gen == goto_switch_gen
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|| entry->parent->opcode_rule->gen == padded_switch_gen);
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ASSERT (entry->parent->opcode);
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/* skip over any instructions combined into another entry */
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if (entry->combined_parent != NULL)
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return;
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if (entry->parent->opcode->is_boolean && entry->opcode_nr == 0)
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{
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/* case: boolean false target */
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lf_printf (file, "case %d:\n", entry->parent->opcode->boolean_constant);
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}
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else if (entry->parent->opcode->is_boolean && entry->opcode_nr != 0)
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{
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/* case: boolean true case */
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lf_printf (file, "default:\n");
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}
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else if (entry->parent->opcode_rule->gen == switch_gen
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|| entry->parent->opcode_rule->gen == padded_switch_gen)
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{
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/* case: <opcode-nr> - switch */
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gen_entry *cob;
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for (cob = entry; cob != NULL; cob = cob->combined_next)
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lf_printf (file, "case %d:\n", cob->opcode_nr);
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}
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else if (entry->parent->opcode_rule->gen == goto_switch_gen)
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{
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/* case: <opcode-nr> - goto-switch */
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print_goto_switch_name (file, entry);
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lf_printf (file, ":\n");
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}
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else
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{
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ERROR ("bad switch");
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}
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lf_printf (file, " {\n");
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lf_indent (file, +4);
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{
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if (entry->opcode == NULL)
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{
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/* switch calling leaf */
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ASSERT (entry->nr_insns == 1);
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print_idecode_ifetch (file, entry->nr_prefetched_words,
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entry->insns->semantic->nr_prefetched_words);
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switch (options.gen.code)
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{
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case generate_jumps:
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lf_printf (file, "goto ");
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break;
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case generate_calls:
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lf_printf (file, "%s", result);
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break;
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}
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print_function_name (file,
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entry->insns->insn->name,
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entry->insns->insn->format_name,
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NULL,
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entry->expanded_bits,
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(options.gen.icache
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? function_name_prefix_icache
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: function_name_prefix_semantics));
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if (options.gen.code == generate_calls)
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{
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lf_printf (file, " (");
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print_semantic_function_actual (file,
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entry->insns->semantic->
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nr_prefetched_words);
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lf_printf (file, ")");
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}
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lf_printf (file, ";\n");
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}
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else if (entry->opcode_rule->gen == switch_gen
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|| entry->opcode_rule->gen == goto_switch_gen
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|| entry->opcode_rule->gen == padded_switch_gen)
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{
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/* switch calling switch */
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lf_printf (file, "{\n");
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lf_indent (file, +2);
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print_idecode_ifetch (file, entry->parent->nr_prefetched_words,
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entry->nr_prefetched_words);
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print_idecode_switch (file, entry, result);
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lf_indent (file, -2);
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lf_printf (file, "}\n");
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}
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else
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{
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/* switch looking up a table */
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lf_printf (file, "{\n");
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lf_indent (file, +2);
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print_idecode_ifetch (file, entry->parent->nr_prefetched_words,
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entry->nr_prefetched_words);
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print_idecode_table (file, entry, result);
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lf_indent (file, -2);
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lf_printf (file, "}\n");
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}
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if (entry->parent->opcode->is_boolean
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|| entry->parent->opcode_rule->gen == switch_gen
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|| entry->parent->opcode_rule->gen == padded_switch_gen)
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{
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lf_printf (file, "break;\n");
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}
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else if (entry->parent->opcode_rule->gen == goto_switch_gen)
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{
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print_goto_switch_break (file, entry);
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}
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else
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{
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ERROR ("bad switch");
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}
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}
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lf_indent (file, -4);
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lf_printf (file, " }\n");
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}
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static void
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print_idecode_switch_illegal (lf *file, const char *result)
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{
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lf_indent (file, +2);
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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");
|
|
}
|