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/* 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(file, SEMANTIC_FUNCTION_TYPE, "PSIM_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, "(%s)", SEMANTIC_FUNCTION_FORMAL);
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_illegal(lf *file,
const char *result)
{
if ((code & generate_jumps))
lf_printf(file, "goto %s_illegal;\n", (code & generate_with_icache) ? "icache" : "semantic");
else if ((code & generate_with_icache))
lf_printf(file, "%s icache_illegal(%s);\n", result, ICACHE_FUNCTION_ACTUAL);
else
lf_printf(file, "%s semantic_illegal(%s);\n", result, SEMANTIC_FUNCTION_ACTUAL);
}
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_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, ", processor, cia);\n");
lf_printf(file, "}\n");
/* generate the code (or at least something */
lf_printf(file, "\n");
lf_printf(file, "/* semantics: */\n");
lf_printf(file, "nia = cia + %d;\n", insn_bit_size / 8);
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_putstr(file, "error(\"%s:%d:0x%08lx:%s unimplemented\\n\",\n");
lf_printf(file, " itable[MY_INDEX].file, itable[MY_INDEX].line_nr, (long)cia, itable[MY_INDEX].name);\n");
lf_print__internal_reference(file);
}
}
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, "unsigned_word nia;\n");
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);
}
}
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