595 lines
16 KiB
C
595 lines
16 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
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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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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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 "ld-decode.h"
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#include "ld-cache.h"
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#include "ld-insn.h"
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#include "igen.h"
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#include "gen-semantics.h"
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#include "gen-idecode.h"
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#include "gen-icache.h"
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static void
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print_icache_function_header(lf *file,
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const char *basename,
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insn_bits *expanded_bits,
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int is_function_definition)
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{
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lf_printf(file, "\n");
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lf_print_function_type(file, ICACHE_FUNCTION_TYPE, "EXTERN_ICACHE", " ");
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print_function_name(file,
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basename,
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expanded_bits,
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function_name_prefix_icache);
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lf_printf(file, "\n(%s)", ICACHE_FUNCTION_FORMAL);
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if (!is_function_definition)
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lf_printf(file, ";");
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lf_printf(file, "\n");
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}
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void
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print_icache_declaration(insn_table *entry,
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lf *file,
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void *data,
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insn *instruction,
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int depth)
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{
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if (generate_expanded_instructions) {
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ASSERT(entry->nr_insn == 1);
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print_icache_function_header(file,
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entry->insns->file_entry->fields[insn_name],
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entry->expanded_bits,
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0/* is not function definition */);
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}
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else {
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print_icache_function_header(file,
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instruction->file_entry->fields[insn_name],
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NULL,
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0/* is not function definition */);
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}
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}
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static void
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print_icache_extraction(lf *file,
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insn *instruction,
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char *field_name,
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char *field_type,
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char *field_expression,
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const char *file_name,
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int line_nr,
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insn_field *cur_field,
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insn_bits *bits,
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int use_defines,
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int get_value_from_cache,
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int put_value_in_cache)
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{
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ASSERT(field_name != NULL);
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if (use_defines && put_value_in_cache) {
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/* We've finished with the value - destory it */
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lf_indent_suppress(file);
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lf_printf(file, "#undef %s\n", field_name);
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return;
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}
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else if (use_defines && get_value_from_cache) {
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lf_indent_suppress(file);
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lf_printf(file, "#define %s ", field_name);
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}
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else {
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lf_print__external_reference(file, line_nr, file_name);
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lf_printf(file, "%s const %s __attribute__((__unused__)) = ",
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field_type == NULL ? "unsigned" : field_type,
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field_name);
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}
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if (bits != NULL
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&& ((bits->opcode->is_boolean
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&& bits->value == 0)
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|| !bits->opcode->is_boolean)
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&& strcmp(field_name, cur_field->val_string) == 0) {
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/* The field has been made constant (as a result of expanding
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instructions or similar) - define a constant variable with the
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corresponding value. */
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ASSERT(bits->field == cur_field);
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ASSERT(field_type == NULL);
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if (bits->opcode->is_boolean)
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lf_printf(file, "%d", bits->opcode->boolean_constant);
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else if (bits->opcode->last < bits->field->last)
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lf_printf(file, "%d",
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bits->value << (bits->field->last - bits->opcode->last));
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else
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lf_printf(file, "%d", bits->value);
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}
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else {
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/* put the field in the local variable, possibly also enter it
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into the cache */
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/* getting it from the cache */
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if (get_value_from_cache || put_value_in_cache) {
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lf_printf(file, "cache_entry->crack.%s.%s",
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instruction->file_entry->fields[insn_form],
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field_name);
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if (put_value_in_cache) /* also put it in the cache? */
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lf_printf(file, " = ");
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}
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if (!get_value_from_cache) {
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if (strcmp(field_name, cur_field->val_string) == 0)
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lf_printf(file, "EXTRACTED32(instruction, %d, %d)",
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i2target(hi_bit_nr, cur_field->first),
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i2target(hi_bit_nr, cur_field->last));
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else if (field_expression != NULL)
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lf_printf(file, "%s", field_expression);
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else
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lf_printf(file, "eval_%s", field_name);
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}
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}
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if (use_defines && get_value_from_cache)
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lf_printf(file, "\n");
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else
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lf_printf(file, ";\n");
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}
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void
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print_icache_body(lf *file,
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insn *instruction,
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insn_bits *expanded_bits,
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cache_table *cache_rules,
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int use_defines,
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int get_value_from_cache,
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int put_value_in_cache)
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{
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insn_field *cur_field;
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/* extract instruction fields */
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lf_printf(file, "/* extraction: %s defines=%d get-value=%d put-value=%d */\n",
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instruction->file_entry->fields[insn_format],
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use_defines, get_value_from_cache, put_value_in_cache);
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for (cur_field = instruction->fields->first;
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cur_field->first < insn_bit_size;
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cur_field = cur_field->next) {
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if (cur_field->is_string) {
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insn_bits *bits;
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int found_rule = 0;
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/* find any corresponding value */
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for (bits = expanded_bits;
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bits != NULL;
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bits = bits->last) {
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if (bits->field == cur_field)
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break;
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}
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/* try the cache rule table for what to do */
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if (get_value_from_cache || put_value_in_cache) {
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cache_table *cache_rule;
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for (cache_rule = cache_rules;
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cache_rule != NULL;
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cache_rule = cache_rule->next) {
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if (strcmp(cur_field->val_string, cache_rule->old_name) == 0) {
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found_rule = 1;
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if (cache_rule->type == compute_value
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&& put_value_in_cache
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&& !use_defines)
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print_icache_extraction(file,
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instruction,
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cache_rule->new_name,
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cache_rule->type_def,
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cache_rule->expression,
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cache_rule->file_entry->file_name,
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cache_rule->file_entry->line_nr,
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cur_field,
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bits,
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0 /*use_defines*/,
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0 /*get-value-from-cache*/,
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0 /*put-value-in-cache*/);
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else if (cache_rule->type == cache_value)
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print_icache_extraction(file,
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instruction,
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cache_rule->new_name,
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cache_rule->type_def,
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cache_rule->expression,
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cache_rule->file_entry->file_name,
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cache_rule->file_entry->line_nr,
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cur_field,
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bits,
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use_defines,
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get_value_from_cache,
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put_value_in_cache);
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}
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}
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}
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if (found_rule == 0)
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print_icache_extraction(file,
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instruction,
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cur_field->val_string,
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0,
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0,
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instruction->file_entry->file_name,
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instruction->file_entry->line_nr,
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cur_field,
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bits,
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use_defines,
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get_value_from_cache,
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put_value_in_cache);
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/* if any (XXX == 0), output a corresponding test */
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if (instruction->file_entry->annex != NULL) {
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char *field_name = cur_field->val_string;
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char *is_0_ptr = instruction->file_entry->annex;
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int field_len = strlen(field_name);
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if (strlen(is_0_ptr) >= (strlen("_is_0") + field_len)) {
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is_0_ptr += field_len;
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while ((is_0_ptr = strstr(is_0_ptr, "_is_0")) != NULL) {
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if (strncmp(is_0_ptr - field_len, field_name, field_len) == 0
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&& !isalpha(is_0_ptr[ - field_len - 1])) {
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if (!use_defines || (use_defines && get_value_from_cache)) {
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if (use_defines) {
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lf_indent_suppress(file);
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lf_printf(file, "#define %s_is_0 ", field_name);
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}
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else {
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table_entry_print_cpp_line_nr(file, instruction->file_entry);
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lf_printf(file, "const unsigned %s_is_0 __attribute__((__unused__)) = ",
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field_name);
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}
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if (bits != NULL)
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lf_printf(file, "(%d == 0)", bits->value);
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else
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lf_printf(file, "(%s == 0)", field_name);
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if (use_defines)
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lf_printf(file, "\n");
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else
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lf_printf(file, ";\n");
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}
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else if (use_defines && put_value_in_cache) {
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lf_indent_suppress(file);
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lf_printf(file, "#undef %s_is_0\n", field_name);
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}
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break;
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}
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is_0_ptr += strlen("_is_0");
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}
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}
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}
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/* any thing else ... */
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}
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}
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lf_print__internal_reference(file);
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}
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typedef struct _icache_tree icache_tree;
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struct _icache_tree {
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char *name;
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icache_tree *next;
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icache_tree *children;
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};
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static icache_tree *
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icache_tree_insert(icache_tree *tree,
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char *name)
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{
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icache_tree *new_tree;
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/* find it */
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icache_tree **ptr_to_cur_tree = &tree->children;
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icache_tree *cur_tree = *ptr_to_cur_tree;
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while (cur_tree != NULL
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&& strcmp(cur_tree->name, name) < 0) {
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ptr_to_cur_tree = &cur_tree->next;
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cur_tree = *ptr_to_cur_tree;
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}
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ASSERT(cur_tree == NULL
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|| strcmp(cur_tree->name, name) >= 0);
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/* already in the tree */
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if (cur_tree != NULL
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&& strcmp(cur_tree->name, name) == 0)
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return cur_tree;
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/* missing, insert it */
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ASSERT(cur_tree == NULL
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|| strcmp(cur_tree->name, name) > 0);
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new_tree = ZALLOC(icache_tree);
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new_tree->name = name;
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new_tree->next = cur_tree;
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*ptr_to_cur_tree = new_tree;
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return new_tree;
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}
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static icache_tree *
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insn_table_cache_fields(insn_table *table)
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{
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icache_tree *tree = ZALLOC(icache_tree);
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insn *instruction;
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for (instruction = table->insns;
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instruction != NULL;
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instruction = instruction->next) {
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insn_field *field;
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icache_tree *form =
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icache_tree_insert(tree,
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instruction->file_entry->fields[insn_form]);
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for (field = instruction->fields->first;
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field != NULL;
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field = field->next) {
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if (field->is_string)
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icache_tree_insert(form, field->val_string);
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}
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}
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return tree;
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}
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extern void
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print_icache_struct(insn_table *instructions,
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cache_table *cache_rules,
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lf *file)
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{
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icache_tree *tree = insn_table_cache_fields(instructions);
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lf_printf(file, "#define WITH_IDECODE_CACHE_SIZE %d\n",
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(code & generate_with_icache) ? icache_size : 0);
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lf_printf(file, "\n");
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/* create an instruction cache if being used */
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if ((code & generate_with_icache)) {
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icache_tree *form;
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lf_printf(file, "typedef struct _idecode_cache {\n");
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lf_printf(file, " unsigned_word address;\n");
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lf_printf(file, " void *semantic;\n");
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lf_printf(file, " union {\n");
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for (form = tree->children;
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form != NULL;
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form = form->next) {
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icache_tree *field;
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lf_printf(file, " struct {\n");
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for (field = form->children;
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field != NULL;
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field = field->next) {
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cache_table *cache_rule;
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int found_rule = 0;
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for (cache_rule = cache_rules;
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cache_rule != NULL;
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cache_rule = cache_rule->next) {
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if (strcmp(field->name, cache_rule->old_name) == 0) {
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found_rule = 1;
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if (cache_rule->new_name != NULL)
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lf_printf(file, " %s %s; /* %s */\n",
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(cache_rule->type_def == NULL
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? "unsigned"
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: cache_rule->type_def),
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cache_rule->new_name,
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cache_rule->old_name);
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}
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}
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if (!found_rule)
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lf_printf(file, " unsigned %s;\n", field->name);
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}
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lf_printf(file, " } %s;\n", form->name);
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}
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lf_printf(file, " } crack;\n");
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lf_printf(file, "} idecode_cache;\n");
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}
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else {
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/* alernativly, since no cache, #define the fields to be
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extractions from the instruction variable. Emit a dummy
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definition for idecode_cache to allow model_issue to not
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be #ifdefed at the call level */
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cache_table *cache_rule;
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lf_printf(file, "\n");
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lf_printf(file, "typedef void idecode_cache;\n");
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lf_printf(file, "\n");
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for (cache_rule = cache_rules;
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cache_rule != NULL;
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cache_rule = cache_rule->next) {
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if (cache_rule->expression != NULL
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&& strlen(cache_rule->expression) > 0)
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lf_printf(file, "#define %s %s\n",
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cache_rule->new_name, cache_rule->expression);
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}
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}
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}
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static void
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print_icache_function(lf *file,
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insn *instruction,
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insn_bits *expanded_bits,
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opcode_field *opcodes,
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cache_table *cache_rules)
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{
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int indent;
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/* generate code to enter decoded instruction into the icache */
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lf_printf(file, "\n");
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lf_print_function_type(file, ICACHE_FUNCTION_TYPE, "EXTERN_ICACHE", "\n");
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indent = print_function_name(file,
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instruction->file_entry->fields[insn_name],
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expanded_bits,
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function_name_prefix_icache);
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lf_indent(file, +indent);
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lf_printf(file, "(%s)\n", ICACHE_FUNCTION_FORMAL);
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lf_indent(file, -indent);
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/* function header */
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lf_printf(file, "{\n");
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lf_indent(file, +2);
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print_define_my_index(file, instruction->file_entry);
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print_itrace(file, instruction->file_entry, 1/*putting-value-in-cache*/);
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print_idecode_validate(file, instruction, opcodes);
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lf_printf(file, "\n");
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lf_printf(file, "{\n");
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lf_indent(file, +2);
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print_icache_body(file,
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instruction,
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expanded_bits,
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cache_rules,
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0/*use_defines*/,
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0/*get_value_from_cache*/,
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1/*put_value_in_cache*/);
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if ((code & generate_with_semantic_icache)) {
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lf_printf(file, "unsigned_word nia;\n");
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lf_printf(file, "cache_entry->address = cia;\n");
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lf_printf(file, "cache_entry->semantic = ");
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print_function_name(file,
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instruction->file_entry->fields[insn_name],
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expanded_bits,
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function_name_prefix_semantics);
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lf_printf(file, ";\n");
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print_semantic_body(file,
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instruction,
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expanded_bits,
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opcodes);
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lf_printf(file, "\n");
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lf_printf(file, "return nia;\n");
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}
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lf_indent(file, -2);
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lf_printf(file, "}\n");
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if (!(code & generate_with_semantic_icache)) {
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/* return the function propper (main sorts this one out) */
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lf_printf(file, "\n");
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lf_printf(file, "/* semantic routine */\n");
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table_entry_print_cpp_line_nr(file, instruction->file_entry);
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lf_printf(file, "return ");
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print_function_name(file,
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instruction->file_entry->fields[insn_name],
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expanded_bits,
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function_name_prefix_semantics);
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lf_printf(file, ";\n");
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lf_print__internal_reference(file);
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}
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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
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print_icache_definition(insn_table *entry,
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lf *file,
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void *data,
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insn *instruction,
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int depth)
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{
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cache_table *cache_rules = (cache_table*)data;
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if (generate_expanded_instructions) {
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ASSERT(entry->nr_insn == 1
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&& entry->opcode == NULL
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&& entry->parent != NULL
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&& 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_icache_function(file,
|
|
entry->insns,
|
|
entry->expanded_bits,
|
|
entry->opcode,
|
|
cache_rules);
|
|
}
|
|
else {
|
|
print_icache_function(file,
|
|
instruction,
|
|
NULL,
|
|
NULL,
|
|
cache_rules);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void
|
|
print_icache_internal_function_declaration(insn_table *table,
|
|
lf *file,
|
|
void *data,
|
|
table_entry *function)
|
|
{
|
|
ASSERT((code & generate_with_icache) != 0);
|
|
if (it_is("internal", function->fields[insn_flags])) {
|
|
lf_printf(file, "\n");
|
|
lf_print_function_type(file, ICACHE_FUNCTION_TYPE, "INLINE_ICACHE",
|
|
"\n");
|
|
print_function_name(file,
|
|
function->fields[insn_name],
|
|
NULL,
|
|
function_name_prefix_icache);
|
|
lf_printf(file, "\n(%s);\n", ICACHE_FUNCTION_FORMAL);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
print_icache_internal_function_definition(insn_table *table,
|
|
lf *file,
|
|
void *data,
|
|
table_entry *function)
|
|
{
|
|
ASSERT((code & generate_with_icache) != 0);
|
|
if (it_is("internal", function->fields[insn_flags])) {
|
|
lf_printf(file, "\n");
|
|
lf_print_function_type(file, ICACHE_FUNCTION_TYPE, "INLINE_ICACHE",
|
|
"\n");
|
|
print_function_name(file,
|
|
function->fields[insn_name],
|
|
NULL,
|
|
function_name_prefix_icache);
|
|
lf_printf(file, "\n(%s)\n", ICACHE_FUNCTION_FORMAL);
|
|
lf_printf(file, "{\n");
|
|
lf_indent(file, +2);
|
|
lf_printf(file, "/* semantic routine */\n");
|
|
table_entry_print_cpp_line_nr(file, function);
|
|
if ((code & generate_with_semantic_icache)) {
|
|
lf_print__c_code(file, function->annex);
|
|
lf_printf(file, "error(\"Internal function must longjump\\n\");\n");
|
|
lf_printf(file, "return 0;\n");
|
|
}
|
|
else {
|
|
lf_printf(file, "return ");
|
|
print_function_name(file,
|
|
function->fields[insn_name],
|
|
NULL,
|
|
function_name_prefix_semantics);
|
|
lf_printf(file, ";\n");
|
|
}
|
|
|
|
lf_print__internal_reference(file);
|
|
lf_indent(file, -2);
|
|
lf_printf(file, "}\n");
|
|
}
|
|
}
|