676 lines
19 KiB
C
676 lines
19 KiB
C
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/* This file is part of the program psim.
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Copyright (C) 1994-1997, 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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const char *entry_name,
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const char *entry_type,
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const char *entry_expression,
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const char *original_name,
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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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icache_decl_type what_to_declare,
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icache_body_type what_to_do,
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const char *reason)
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{
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const char *expression;
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ASSERT(entry_name != NULL);
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/* Define a storage area for the cache element */
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if (what_to_declare == undef_variables) {
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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", entry_name);
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return;
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}
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else if (what_to_declare == define_variables) {
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lf_indent_suppress(file);
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lf_printf(file, "#define %s ", entry_name);
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}
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else {
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if (file_name != NULL)
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lf_print__external_reference(file, line_nr, file_name);
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lf_printf(file, "%s const %s UNUSED = ",
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entry_type == NULL ? "unsigned" : entry_type,
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entry_name);
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}
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/* define a value for that storage area as determined by what is in
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the cache */
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if (bits != NULL
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&& strcmp(entry_name, cur_field->val_string) == 0
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&& ((bits->opcode->is_boolean && bits->value == 0)
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|| (!bits->opcode->is_boolean))) {
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/* The simple field has been made constant (as a result of
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expanding instructions or similar). Remember that for a
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boolean field, value is either 0 (implying the required
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boolean_constant) or nonzero (implying some other value and
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handled later below) - Define the variable accordingly */
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expression = "constant field";
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ASSERT(bits->field == cur_field);
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ASSERT(entry_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 if (bits != NULL
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&& original_name != NULL
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&& strncmp(entry_name,
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original_name, strlen(original_name)) == 0
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&& strncmp(entry_name + strlen(original_name),
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"_is_", strlen("_is_")) == 0
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&& ((bits->opcode->is_boolean
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&& (atol(entry_name + strlen(original_name) + strlen("_is_"))
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== bits->opcode->boolean_constant))
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|| (!bits->opcode->is_boolean))) {
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expression = "constant compare";
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/* An entry, derived from ORIGINAL_NAME, is testing to see of the
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ORIGINAL_NAME has a specific constant value. That value
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matching a boolean or constant field */
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if (bits->opcode->is_boolean)
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lf_printf(file, "%d /* %s == %d */",
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bits->value == 0,
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original_name,
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bits->opcode->boolean_constant);
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else if (bits->opcode->last < bits->field->last)
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lf_printf(file, "%d /* %s == %d */",
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(atol(entry_name + strlen(original_name) + strlen("_is_"))
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== (bits->value << (bits->field->last - bits->opcode->last))),
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original_name,
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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 /* %s == %d */",
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(atol(entry_name + strlen(original_name) + strlen("_is_"))
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== bits->value),
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original_name,
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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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expression = "extraction";
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/* handle the cache */
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if ((what_to_do & get_values_from_icache)
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|| (what_to_do & put_values_in_icache)) {
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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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entry_name);
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if (what_to_do & put_values_in_icache) /* also put it in the cache? */
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lf_printf(file, " = ");
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}
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if ((what_to_do & put_values_in_icache)
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|| what_to_do == do_not_use_icache) {
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if (cur_field != NULL && strcmp(entry_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 (entry_expression != NULL)
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lf_printf(file, "%s", entry_expression);
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else
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lf_printf(file, "eval_%s", entry_name);
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}
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}
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if (!((what_to_declare == define_variables)
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|| (what_to_declare == undef_variables)))
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lf_printf(file, ";");
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if (reason != NULL)
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lf_printf(file, " /* %s - %s */", reason, expression);
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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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icache_decl_type what_to_declare,
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icache_body_type what_to_do)
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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 ",
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instruction->file_entry->fields[insn_format]);
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switch (what_to_declare) {
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case define_variables:
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lf_printf(file, "#define");
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break;
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case declare_variables:
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lf_printf(file, "declare");
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break;
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case undef_variables:
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lf_printf(file, "#undef");
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break;
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}
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lf_printf(file, " ");
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switch (what_to_do) {
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case get_values_from_icache:
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lf_printf(file, "get-values-from-icache");
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break;
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case put_values_in_icache:
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lf_printf(file, "put-values-in-icache");
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break;
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case both_values_and_icache:
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lf_printf(file, "get-values-from-icache|put-values-in-icache");
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break;
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case do_not_use_icache:
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lf_printf(file, "do-not-use-icache");
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break;
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}
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lf_printf(file, " */\n");
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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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{
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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->field_name) == 0) {
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found_rule = 1;
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if (cache_rule->type == scratch_value
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&& ((what_to_do & put_values_in_icache)
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|| what_to_do == do_not_use_icache))
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print_icache_extraction(file,
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instruction,
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cache_rule->derived_name,
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cache_rule->type_def,
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cache_rule->expression,
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cache_rule->field_name,
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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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what_to_declare,
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do_not_use_icache,
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"icache scratch");
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else if (cache_rule->type == compute_value
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&& ((what_to_do & get_values_from_icache)
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|| what_to_do == do_not_use_icache))
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print_icache_extraction(file,
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instruction,
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cache_rule->derived_name,
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cache_rule->type_def,
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cache_rule->expression,
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cache_rule->field_name,
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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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what_to_declare,
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do_not_use_icache,
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"semantic compute");
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else if (cache_rule->type == cache_value
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&& ((what_to_declare != undef_variables)
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|| !(what_to_do & put_values_in_icache)))
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print_icache_extraction(file,
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instruction,
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cache_rule->derived_name,
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cache_rule->type_def,
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cache_rule->expression,
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cache_rule->field_name,
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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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((what_to_do & put_values_in_icache)
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? declare_variables
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: what_to_declare),
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what_to_do,
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"in icache");
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}
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}
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}
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/* No rule at all, assume that this is needed in the semantic
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function (when values are extracted from the icache) and
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hence must be put into the cache */
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if (found_rule == 0
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&& ((what_to_declare != undef_variables)
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|| !(what_to_do & put_values_in_icache)))
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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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NULL, NULL, NULL, /* type, exp, orig */
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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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((what_to_do & put_values_in_icache)
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? declare_variables
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: what_to_declare),
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what_to_do,
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"default in icache");
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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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if ((code & generate_with_insn_in_icache)) {
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lf_printf(file, "\n");
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print_icache_extraction(file,
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instruction,
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"insn",
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"instruction_word",
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"instruction",
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NULL, /* origin */
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NULL, 0, /* file_name & line_nr */
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NULL, NULL,
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what_to_declare,
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what_to_do,
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NULL);
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}
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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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||
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icache_tree *children;
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};
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|
|
||
|
|
static icache_tree *
|
||
|
|
icache_tree_insert(icache_tree *tree,
|
||
|
|
char *name)
|
||
|
|
{
|
||
|
|
icache_tree *new_tree;
|
||
|
|
/* find it */
|
||
|
|
icache_tree **ptr_to_cur_tree = &tree->children;
|
||
|
|
icache_tree *cur_tree = *ptr_to_cur_tree;
|
||
|
|
while (cur_tree != NULL
|
||
|
|
&& strcmp(cur_tree->name, name) < 0) {
|
||
|
|
ptr_to_cur_tree = &cur_tree->next;
|
||
|
|
cur_tree = *ptr_to_cur_tree;
|
||
|
|
}
|
||
|
|
ASSERT(cur_tree == NULL
|
||
|
|
|| strcmp(cur_tree->name, name) >= 0);
|
||
|
|
/* already in the tree */
|
||
|
|
if (cur_tree != NULL
|
||
|
|
&& strcmp(cur_tree->name, name) == 0)
|
||
|
|
return cur_tree;
|
||
|
|
/* missing, insert it */
|
||
|
|
ASSERT(cur_tree == NULL
|
||
|
|
|| strcmp(cur_tree->name, name) > 0);
|
||
|
|
new_tree = ZALLOC(icache_tree);
|
||
|
|
new_tree->name = name;
|
||
|
|
new_tree->next = cur_tree;
|
||
|
|
*ptr_to_cur_tree = new_tree;
|
||
|
|
return new_tree;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static icache_tree *
|
||
|
|
insn_table_cache_fields(insn_table *table)
|
||
|
|
{
|
||
|
|
icache_tree *tree = ZALLOC(icache_tree);
|
||
|
|
insn *instruction;
|
||
|
|
for (instruction = table->insns;
|
||
|
|
instruction != NULL;
|
||
|
|
instruction = instruction->next) {
|
||
|
|
insn_field *field;
|
||
|
|
icache_tree *form =
|
||
|
|
icache_tree_insert(tree,
|
||
|
|
instruction->file_entry->fields[insn_form]);
|
||
|
|
for (field = instruction->fields->first;
|
||
|
|
field != NULL;
|
||
|
|
field = field->next) {
|
||
|
|
if (field->is_string)
|
||
|
|
icache_tree_insert(form, field->val_string);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return tree;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
extern void
|
||
|
|
print_icache_struct(insn_table *instructions,
|
||
|
|
cache_table *cache_rules,
|
||
|
|
lf *file)
|
||
|
|
{
|
||
|
|
icache_tree *tree = insn_table_cache_fields(instructions);
|
||
|
|
|
||
|
|
lf_printf(file, "\n");
|
||
|
|
lf_printf(file, "#define WITH_IDECODE_CACHE_SIZE %d\n",
|
||
|
|
(code & generate_with_icache) ? icache_size : 0);
|
||
|
|
lf_printf(file, "\n");
|
||
|
|
|
||
|
|
/* create an instruction cache if being used */
|
||
|
|
if ((code & generate_with_icache)) {
|
||
|
|
icache_tree *form;
|
||
|
|
lf_printf(file, "typedef struct _idecode_cache {\n");
|
||
|
|
lf_printf(file, " unsigned_word address;\n");
|
||
|
|
lf_printf(file, " void *semantic;\n");
|
||
|
|
lf_printf(file, " union {\n");
|
||
|
|
for (form = tree->children;
|
||
|
|
form != NULL;
|
||
|
|
form = form->next) {
|
||
|
|
icache_tree *field;
|
||
|
|
lf_printf(file, " struct {\n");
|
||
|
|
if (code & generate_with_insn_in_icache)
|
||
|
|
lf_printf(file, " instruction_word insn;\n");
|
||
|
|
for (field = form->children;
|
||
|
|
field != NULL;
|
||
|
|
field = field->next) {
|
||
|
|
cache_table *cache_rule;
|
||
|
|
int found_rule = 0;
|
||
|
|
for (cache_rule = cache_rules;
|
||
|
|
cache_rule != NULL;
|
||
|
|
cache_rule = cache_rule->next) {
|
||
|
|
if (strcmp(field->name, cache_rule->field_name) == 0) {
|
||
|
|
found_rule = 1;
|
||
|
|
if (cache_rule->derived_name != NULL)
|
||
|
|
lf_printf(file, " %s %s; /* %s */\n",
|
||
|
|
(cache_rule->type_def == NULL
|
||
|
|
? "unsigned"
|
||
|
|
: cache_rule->type_def),
|
||
|
|
cache_rule->derived_name,
|
||
|
|
cache_rule->field_name);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!found_rule)
|
||
|
|
lf_printf(file, " unsigned %s;\n", field->name);
|
||
|
|
}
|
||
|
|
lf_printf(file, " } %s;\n", form->name);
|
||
|
|
}
|
||
|
|
lf_printf(file, " } crack;\n");
|
||
|
|
lf_printf(file, "} idecode_cache;\n");
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
/* alernativly, since no cache, emit a dummy definition for
|
||
|
|
idecode_cache so that code refering to the type can still compile */
|
||
|
|
lf_printf(file, "typedef void idecode_cache;\n");
|
||
|
|
}
|
||
|
|
lf_printf(file, "\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
static void
|
||
|
|
print_icache_function(lf *file,
|
||
|
|
insn *instruction,
|
||
|
|
insn_bits *expanded_bits,
|
||
|
|
opcode_field *opcodes,
|
||
|
|
cache_table *cache_rules)
|
||
|
|
{
|
||
|
|
int indent;
|
||
|
|
|
||
|
|
/* generate code to enter decoded instruction into the icache */
|
||
|
|
lf_printf(file, "\n");
|
||
|
|
lf_print_function_type(file, ICACHE_FUNCTION_TYPE, "EXTERN_ICACHE", "\n");
|
||
|
|
indent = print_function_name(file,
|
||
|
|
instruction->file_entry->fields[insn_name],
|
||
|
|
expanded_bits,
|
||
|
|
function_name_prefix_icache);
|
||
|
|
lf_indent(file, +indent);
|
||
|
|
lf_printf(file, "(%s)\n", ICACHE_FUNCTION_FORMAL);
|
||
|
|
lf_indent(file, -indent);
|
||
|
|
|
||
|
|
/* function header */
|
||
|
|
lf_printf(file, "{\n");
|
||
|
|
lf_indent(file, +2);
|
||
|
|
|
||
|
|
print_my_defines(file, expanded_bits, instruction->file_entry);
|
||
|
|
print_itrace(file, instruction->file_entry, 1/*putting-value-in-cache*/);
|
||
|
|
|
||
|
|
print_idecode_validate(file, instruction, opcodes);
|
||
|
|
|
||
|
|
lf_printf(file, "\n");
|
||
|
|
lf_printf(file, "{\n");
|
||
|
|
lf_indent(file, +2);
|
||
|
|
if ((code & generate_with_semantic_icache))
|
||
|
|
lf_printf(file, "unsigned_word nia;\n");
|
||
|
|
print_icache_body(file,
|
||
|
|
instruction,
|
||
|
|
expanded_bits,
|
||
|
|
cache_rules,
|
||
|
|
((code & generate_with_direct_access)
|
||
|
|
? define_variables
|
||
|
|
: declare_variables),
|
||
|
|
((code & generate_with_semantic_icache)
|
||
|
|
? both_values_and_icache
|
||
|
|
: put_values_in_icache));
|
||
|
|
|
||
|
|
lf_printf(file, "\n");
|
||
|
|
lf_printf(file, "cache_entry->address = cia;\n");
|
||
|
|
lf_printf(file, "cache_entry->semantic = ");
|
||
|
|
print_function_name(file,
|
||
|
|
instruction->file_entry->fields[insn_name],
|
||
|
|
expanded_bits,
|
||
|
|
function_name_prefix_semantics);
|
||
|
|
lf_printf(file, ";\n");
|
||
|
|
lf_printf(file, "\n");
|
||
|
|
|
||
|
|
if ((code & generate_with_semantic_icache)) {
|
||
|
|
lf_printf(file, "/* semantic routine */\n");
|
||
|
|
print_semantic_body(file,
|
||
|
|
instruction,
|
||
|
|
expanded_bits,
|
||
|
|
opcodes);
|
||
|
|
lf_printf(file, "return nia;\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(code & generate_with_semantic_icache)) {
|
||
|
|
lf_printf(file, "/* return the function proper */\n");
|
||
|
|
lf_printf(file, "return ");
|
||
|
|
print_function_name(file,
|
||
|
|
instruction->file_entry->fields[insn_name],
|
||
|
|
expanded_bits,
|
||
|
|
function_name_prefix_semantics);
|
||
|
|
lf_printf(file, ";\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((code & generate_with_direct_access))
|
||
|
|
print_icache_body(file,
|
||
|
|
instruction,
|
||
|
|
expanded_bits,
|
||
|
|
cache_rules,
|
||
|
|
undef_variables,
|
||
|
|
((code & generate_with_semantic_icache)
|
||
|
|
? both_values_and_icache
|
||
|
|
: put_values_in_icache));
|
||
|
|
|
||
|
|
lf_indent(file, -2);
|
||
|
|
lf_printf(file, "}\n");
|
||
|
|
lf_indent(file, -2);
|
||
|
|
lf_printf(file, "}\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void
|
||
|
|
print_icache_definition(insn_table *entry,
|
||
|
|
lf *file,
|
||
|
|
void *data,
|
||
|
|
insn *instruction,
|
||
|
|
int depth)
|
||
|
|
{
|
||
|
|
cache_table *cache_rules = (cache_table*)data;
|
||
|
|
if (generate_expanded_instructions) {
|
||
|
|
ASSERT(entry->nr_insn == 1
|
||
|
|
&& entry->opcode == NULL
|
||
|
|
&& entry->parent != NULL
|
||
|
|
&& entry->parent->opcode != NULL);
|
||
|
|
ASSERT(entry->nr_insn == 1
|
||
|
|
&& entry->opcode == NULL
|
||
|
|
&& entry->parent != NULL
|
||
|
|
&& entry->parent->opcode != NULL
|
||
|
|
&& entry->parent->opcode_rule != NULL);
|
||
|
|
print_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");
|
||
|
|
}
|
||
|
|
}
|