308 lines
8.8 KiB
C
308 lines
8.8 KiB
C
/* This file is part of the program psim.
|
||
|
||
Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||
|
||
*/
|
||
|
||
|
||
|
||
#include "misc.h"
|
||
#include "lf.h"
|
||
#include "table.h"
|
||
#include "filter.h"
|
||
|
||
#include "ld-decode.h"
|
||
#include "ld-cache.h"
|
||
#include "ld-insn.h"
|
||
|
||
#include "igen.h"
|
||
|
||
#include "gen-semantics.h"
|
||
#include "gen-icache.h"
|
||
#include "gen-idecode.h"
|
||
|
||
|
||
static void
|
||
print_semantic_function_header(lf *file,
|
||
const char *basename,
|
||
insn_bits *expanded_bits,
|
||
int is_function_definition)
|
||
{
|
||
int indent;
|
||
lf_printf(file, "\n");
|
||
lf_print_function_type_function(file, print_semantic_function_type, "EXTERN_SEMANTICS",
|
||
(is_function_definition ? "\n" : " "));
|
||
indent = print_function_name(file,
|
||
basename,
|
||
expanded_bits,
|
||
function_name_prefix_semantics);
|
||
if (is_function_definition)
|
||
lf_indent(file, +indent);
|
||
else
|
||
lf_printf(file, "\n");
|
||
lf_printf(file, "(");
|
||
print_semantic_function_formal(file);
|
||
lf_printf(file, ")");
|
||
if (is_function_definition)
|
||
lf_indent(file, -indent);
|
||
else
|
||
lf_printf(file, ";");
|
||
lf_printf(file, "\n");
|
||
}
|
||
|
||
void
|
||
print_semantic_declaration(insn_table *entry,
|
||
lf *file,
|
||
void *data,
|
||
insn *instruction,
|
||
int depth)
|
||
{
|
||
if (generate_expanded_instructions) {
|
||
ASSERT(entry->nr_insn == 1);
|
||
print_semantic_function_header(file,
|
||
instruction->file_entry->fields[insn_name],
|
||
entry->expanded_bits,
|
||
0/* is not function definition*/);
|
||
}
|
||
else {
|
||
print_semantic_function_header(file,
|
||
instruction->file_entry->fields[insn_name],
|
||
NULL,
|
||
0/* is not function definition*/);
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* generate the semantics.c file */
|
||
|
||
|
||
void
|
||
print_idecode_invalid(lf *file,
|
||
const char *result,
|
||
invalid_type type)
|
||
{
|
||
const char *name;
|
||
switch (type) {
|
||
default: name = "unknown"; break;
|
||
case invalid_illegal: name = "illegal"; break;
|
||
case invalid_fp_unavailable: name = "fp_unavailable"; break;
|
||
case invalid_wrong_slot: name = "wrong_slot"; break;
|
||
}
|
||
if ((code & generate_jumps))
|
||
lf_printf(file, "goto %s_%s;\n",
|
||
(code & generate_with_icache) ? "icache" : "semantic",
|
||
name);
|
||
else if ((code & generate_with_icache)) {
|
||
lf_printf(file, "%s %sicache_%s(", result, global_name_prefix, name);
|
||
print_icache_function_actual(file);
|
||
lf_printf(file, ");\n");
|
||
}
|
||
else {
|
||
lf_printf(file, "%s %ssemantic_%s(", result, global_name_prefix, name);
|
||
print_semantic_function_actual(file);
|
||
lf_printf(file, ");\n");
|
||
}
|
||
}
|
||
|
||
|
||
void
|
||
print_semantic_body(lf *file,
|
||
insn *instruction,
|
||
insn_bits *expanded_bits,
|
||
opcode_field *opcodes)
|
||
{
|
||
print_itrace(file, instruction->file_entry, 0/*put_value_in_cache*/);
|
||
|
||
/* validate the instruction, if a cache this has already been done */
|
||
if (!(code & generate_with_icache))
|
||
print_idecode_validate(file, instruction, opcodes);
|
||
|
||
/* generate the profiling call - this is delayed until after the
|
||
instruction has been verified */
|
||
lf_printf(file, "\n");
|
||
lf_indent_suppress(file);
|
||
lf_printf(file, "#if defined(WITH_MON)\n");
|
||
lf_printf(file, "/* monitoring: */\n");
|
||
lf_printf(file, "if (WITH_MON & MONITOR_INSTRUCTION_ISSUE) {\n");
|
||
lf_printf(file, " mon_issue(");
|
||
print_function_name(file,
|
||
instruction->file_entry->fields[insn_name],
|
||
NULL,
|
||
function_name_prefix_itable);
|
||
lf_printf(file, ", cpu, cia);\n");
|
||
lf_printf(file, "}\n");
|
||
lf_indent_suppress(file);
|
||
lf_printf(file, "#endif\n");
|
||
lf_printf(file, "\n");
|
||
|
||
/* determine the new instruction address */
|
||
lf_printf(file, "/* keep the next instruction address handy */\n");
|
||
if ((code & generate_with_semantic_returning_modified_nia_only))
|
||
lf_printf(file, "nia = -1;\n");
|
||
else if ((code & generate_with_semantic_delayed_branch)) {
|
||
lf_printf(file, "nia.ip = cia.dp; /* instruction pointer */\n");
|
||
lf_printf(file, "nia.dp = cia.dp + %d; /* delayed-slot pointer */\n",
|
||
insn_bit_size / 8);
|
||
}
|
||
else
|
||
lf_printf(file, "nia = cia + %d;\n", insn_bit_size / 8);
|
||
|
||
/* if conditional, generate code to verify that the instruction
|
||
should be issued */
|
||
if (it_is("c", instruction->file_entry->fields[insn_options])
|
||
|| (code & generate_with_semantic_conditional_issue)) {
|
||
lf_printf(file, "\n");
|
||
lf_printf(file, "/* execute only if conditional passes */\n");
|
||
lf_printf(file, "if (IS_CONDITION_OK) {\n");
|
||
lf_indent(file, +2);
|
||
/* FIXME - need to log a conditional failure */
|
||
}
|
||
|
||
/* generate the code (or at least something */
|
||
lf_printf(file, "\n");
|
||
lf_printf(file, "/* semantics: */\n");
|
||
if (instruction->file_entry->annex != NULL) {
|
||
/* true code */
|
||
table_entry_print_cpp_line_nr(file, instruction->file_entry);
|
||
lf_printf(file, "{\n");
|
||
lf_indent(file, +2);
|
||
lf_print__c_code(file, instruction->file_entry->annex);
|
||
lf_indent(file, -2);
|
||
lf_printf(file, "}\n");
|
||
lf_print__internal_reference(file);
|
||
}
|
||
else if (it_is("nop", instruction->file_entry->fields[insn_flags])) {
|
||
lf_print__internal_reference(file);
|
||
}
|
||
else {
|
||
/* abort so it is implemented now */
|
||
table_entry_print_cpp_line_nr(file, instruction->file_entry);
|
||
lf_printf(file, "engine_error (SD, CPU, cia, \"%s:%d:0x%%08lx:%%s unimplemented\\n\",\n",
|
||
filter_filename(instruction->file_entry->file_name),
|
||
instruction->file_entry->line_nr);
|
||
if ((code & generate_with_semantic_delayed_branch))
|
||
lf_printf(file, " (long)cia.ip,\n");
|
||
else
|
||
lf_printf(file, " (long)cia,\n");
|
||
lf_printf(file, " itable[MY_INDEX].name);\n");
|
||
lf_print__internal_reference(file);
|
||
}
|
||
|
||
/* Close off the conditional execution */
|
||
if (it_is("c", instruction->file_entry->fields[insn_options])
|
||
|| (code & generate_with_semantic_conditional_issue)) {
|
||
lf_indent(file, -2);
|
||
lf_printf(file, "}\n");
|
||
}
|
||
}
|
||
|
||
static void
|
||
print_c_semantic(lf *file,
|
||
insn *instruction,
|
||
insn_bits *expanded_bits,
|
||
opcode_field *opcodes,
|
||
cache_table *cache_rules)
|
||
{
|
||
|
||
lf_printf(file, "{\n");
|
||
lf_indent(file, +2);
|
||
|
||
print_my_defines(file, expanded_bits, instruction->file_entry);
|
||
lf_printf(file, "\n");
|
||
print_icache_body(file,
|
||
instruction,
|
||
expanded_bits,
|
||
cache_rules,
|
||
((code & generate_with_direct_access)
|
||
? define_variables
|
||
: declare_variables),
|
||
((code & generate_with_icache)
|
||
? get_values_from_icache
|
||
: do_not_use_icache));
|
||
|
||
lf_printf(file, "%sinstruction_address nia;\n", global_name_prefix);
|
||
print_semantic_body(file,
|
||
instruction,
|
||
expanded_bits,
|
||
opcodes);
|
||
lf_printf(file, "return nia;\n");
|
||
|
||
/* generate something to clean up any #defines created for the cache */
|
||
if (code & generate_with_direct_access)
|
||
print_icache_body(file,
|
||
instruction,
|
||
expanded_bits,
|
||
cache_rules,
|
||
undef_variables,
|
||
((code & generate_with_icache)
|
||
? get_values_from_icache
|
||
: do_not_use_icache));
|
||
|
||
lf_indent(file, -2);
|
||
lf_printf(file, "}\n");
|
||
}
|
||
|
||
static void
|
||
print_c_semantic_function(lf *file,
|
||
insn *instruction,
|
||
insn_bits *expanded_bits,
|
||
opcode_field *opcodes,
|
||
cache_table *cache_rules)
|
||
{
|
||
/* build the semantic routine to execute the instruction */
|
||
print_semantic_function_header(file,
|
||
instruction->file_entry->fields[insn_name],
|
||
expanded_bits,
|
||
1/*is-function-definition*/);
|
||
print_c_semantic(file,
|
||
instruction,
|
||
expanded_bits,
|
||
opcodes,
|
||
cache_rules);
|
||
}
|
||
|
||
void
|
||
print_semantic_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_c_semantic_function(file,
|
||
entry->insns,
|
||
entry->expanded_bits,
|
||
entry->parent->opcode,
|
||
cache_rules);
|
||
}
|
||
else {
|
||
print_c_semantic_function(file, instruction,
|
||
NULL, NULL,
|
||
cache_rules);
|
||
}
|
||
}
|