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* ld-insn.c (parse_insn_format): Accept '*' as an alternative of

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`/' in bit fields.  `/' denotes a wild bit.
This commit is contained in:
Andrew Cagney 1997-03-14 02:00:07 +00:00
parent 4507d85857
commit 3df381976f
2 changed files with 1190 additions and 0 deletions
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Fri Mar 14 11:24:06 1997 Andrew Cagney <cagney@kremvax.cygnus.com>
* ld-insn.c (parse_insn_format): Accept '*' as an alternative of
`/' in bit fields. `/' denotes a wild bit.
Fri Mar 7 18:20:38 1997 Andrew Cagney <cagney@kremvax.cygnus.com>
* igen.h, igen.c (main): New options. Control generation of
conditional issue and slot verification code.
Fri Mar 7 18:17:25 1997 Andrew Cagney <cagney@kremvax.cygnus.com>
* gen-support.c (print_support_function_name): Prepend the global
name prefix when applicable. Provide #define to map the user
specified name the generated globaly unique one.
Fri Mar 7 18:07:45 1997 Andrew Cagney <cagney@kremvax.cygnus.com>
* gen-idecode.c (print_idecode_validate): Wrap each of the checks
- reserved bits, floating point and slot validation - with a
#ifdef so that they are optional.
Fri Mar 7 16:35:13 1997 Andrew Cagney <cagney@kremvax.cygnus.com>
* gen-idecode.c (error_leaf_contains_multiple_insn): New function
- report the error of a leaf node in the decision tree containing
several instructions.
(print_idecode_table_leaf): Detect a leaf with multiple instructions.
(print_idecode_switch_leaf): Ditto.
* gen-semantics.h, gen-semantics.c (print_idecode_illegal,
print_idecode_invalid): Rename former to latter. Add argument so
that one function can generate all invalid instruction cases -
illegal, fp-unavailable, wrong-slot.
* gen-engine.c: Update.
* gen-idecode.c: Use print_idecode_invalid to generate a function
call for cases when fp-unavailable and the slot is wrong.
* gen-idecode.c (print_idecode_validate): New check, generate code
to verify that the instruction slot is correct.
* igen.c (main): Simplify options.
Wed Mar 5 09:55:55 1997 Andrew Cagney <cagney@kremvax.cygnus.com>
* igen.c (print_itrace): Remove source line reference for trace
code - let the user see the generated file.
(print_itrace): Print the trace code rather than reference a
macro.
Tue Mar 4 17:31:55 1997 Andrew Cagney <cagney@kremvax.cygnus.com>
* igen.c (print_semantic_function_actual): Pass either the
processor - smp - or the engine - mono - into semantic functions.
Don't pass in both.
* gen-icache.c (print_icache_body): Dependant on smp, derive
processor from engine or engine from processor, and hence ensuring
that both are defined in all semantic functions.
Mon Mar 3 17:11:21 1997 Andrew Cagney <cagney@kremvax.cygnus.com>
* ld-insn.c (parse_insn_format): Make the width field optional.
If missing assume that the number of characters in the value
determines the number of bits in the field.
Thu Feb 27 11:27:48 1997 Andrew Cagney <cagney@kremvax.cygnus.com>
* ld-insn.c (insn_table_expand_opcode): Replace assertion with
more useful error message.
Tue Feb 25 16:43:27 1997 Andrew Cagney <cagney@kremvax.cygnus.com>
* misc.c (error): Output errors on stderr.
* ld-insn.c (parse_insn_format): Skip any leading spaces.
Verify the width of instructions being parsed.
* table.c (table_entry_read): Parse CPP's convention for
specifying original file name/line-nr.
Wed Feb 19 12:30:28 1997 Andrew Cagney <cagney@critters.cygnus.com>
* ld-insn.c (parse_insn_format): Allow trailing spaces in
instruction fields.
* Makefile.in: Create using ../ppc/Makefile.in as a starting
point.
* configure.in: Ditto vis ../ppc/configure.in
Mon Feb 17 10:44:18 1997 Andrew Cagney <cagney@critters.cygnus.com>
* gen-support.c (gen_support_c): Always include engine.h instead
of cpu.h
* gen-idecode.c (gen_idecode_c): Ditto.
* words.h (instruction_word): Remove instruction_word - now
generated by igen.
(address_word): New. Used by igen.
* lf.c (lf_print_function_type_function): New, pass a function to
print out the type instead of a constant string.
* igen.h, igen.c (print_semantic_function_formal,
SEMANTIC_FUNCTION_FORMAL): Relace macro with function.
(print_semantic_function_actual, SEMANTIC_FUNCTION_ACTUAL): Ditto.
(print_semantic_function_type, SEMANTIC_FUNCTION_TYPE): Ditto.
(print_icache_function_type, ICACHE_FUNCTION_TYPE): Ditto.
(print_icache_function_formal, ICACHE_FUNCTION_FORMAL): Ditto.
(print_icache_function_actual, ICACHE_FUNCTION_ACTUAL): Ditto.
* gen-idecode.c (print_idecode_table): Update.
(idecode_switch_leaf): Update.
(print_idecode_switch_function_header): Ditto.
(print_idecode_floating_point_unavailable): Ditto.
(print_idecode_issue_function_header): Ditto.
* igen.c (gen_icache_h): Ditto.
* gen-engine.c (print_engine_table): Ditto.
(engine_switch_leaf): Ditto.
* gen-support.c (print_support_function_name): Ditto.
* gen-semantics.c (print_semantic_function_header): Update.
Update.
* gen-icache.c (print_icache_function_header): Update.
(print_icache_function): Update.
(print_icache_internal_function_declaration): Update.
(print_icache_internal_function_definition): Update.
* gen-idecode.c (gen_idecode_h): Drop including of idecode_*.h
files, will at some stage need to move it into support.
* igen.h, igen.c (main): New option -e <engine> - generate a full
simulation engine. Previously this was the -d <idecode-file>
option.
* gen-engine.h, gen-engine.c: Copies of gen-idecode.*. Will need
to clean these up so that that call upon the updated gen-idecode
code.
* gen-idecode.h, gen-idecode.c: Prune out any code not relevant to
generating a decode table.
* Makefile.in (igen): Add dependencies for new gen-engine.* files.
* igen.h, igen.c (main): New option -M - Control what is returned
by semantic functions - -1/NIA vs CIA+N/NIA. Add
generate_semantic_returning_modified_nia_only to igen_code enum.
* gen-semantics.c (print_semantic_body): As an alternative, make
NIA == -1 instead of CIA+insn_size by default.
* igen.h, igen.c (main, global_name_prefix, global_uname_prefix):
New option -P <prefix> - Prepend all generated functions with the
specified prefix.
(gen_idecode_c): Adjust.
* gen-icache.c (print_icache_struct): Ditto.
* gen-support.c (gen_support_c): Ditto.
Sun Feb 16 15:23:15 1997 Andrew Cagney <cagney@critters.cygnus.com>
* igen.c (main): Correct usage. Missleading message about ucase
options dumping internal tables. -F now includes rather then
excludes instructions.
* misc.h, misc.c (a2i): Make 64bit.
* ld-insn.h (max_insn_bit_size, default_insn_bit_size): Increase
max to 64bits, expect trouble. Make the default 32 bits.
* gen-idecode.c (print_idecode_table): Change EXTRACTED*
et.al. macro's to use the insn_bit_size instead of assuming 32
bits.
* gen-icache.c (print_icache_extraction): Ditto.
* gen-idecode.c (idecode_switch_start): Ditto.
* gen-idecode.c (gen_idecode_c): Ditto
* igen.h (insn_specifying_widths), igen.c (main): New option -W.
Indicates that the instruction field of the table is specifying
bit widths instead of bit offsets.
* ld-insn.c (parse_insn_format): Parse instruction fields
specifying widths.
* misc.c (a2i): Allow binary numbers to be specified using the
syntax 0bNNNN.
* ld-insn.c: Allow such numbers to appear in the instruction
format.
* table.c (table_entry_read): Make // a valid comment character.
(table_entry_read): Skip lines containing a leading " - these may
eventually be used in a disasembler.
Fri Feb 14 15:23:15 1997 Andrew Cagney <cagney@critters.cygnus.com>
* filter.c, filter.h, gen-engine.c, gen-engine.h, gen-icache.c,
gen-icache.h, gen-idecode.c, gen-idecode.h, gen-itable.c,
gen-itable.h, gen-model.c, gen-model.h, gen-semantics.c,
gen-semantics.h, gen-support.c, gen-support.h, igen.c, igen.h,
ld-cache.c, ld-cache.h, ld-decode.c, ld-decode.h, ld-insn.c,
ld-insn.h, lf.c, lf.h, misc.c, misc.h, table.c, table.h: Copy in
from the ../ppc directory.
* filter_host.c, filter_host.h: Copy in from the ../ppc directory
renaming from filter_filename.[hc]

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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"
static void
update_depth(insn_table *entry,
lf *file,
void *data,
insn *instruction,
int depth)
{
int *max_depth = (int*)data;
if (*max_depth < depth)
*max_depth = depth;
}
int
insn_table_depth(insn_table *table)
{
int depth = 0;
insn_table_traverse_tree(table,
NULL,
&depth,
1,
NULL, /*start*/
update_depth,
NULL, /*end*/
NULL); /*padding*/
return depth;
}
static insn_fields *
parse_insn_format(table_entry *entry,
char *format)
{
char *chp;
insn_fields *fields = ZALLOC(insn_fields);
/* create a leading sentinal */
fields->first = ZALLOC(insn_field);
fields->first->first = -1;
fields->first->last = -1;
fields->first->width = 0;
/* and a trailing sentinal */
fields->last = ZALLOC(insn_field);
fields->last->first = insn_bit_size;
fields->last->last = insn_bit_size;
fields->last->width = 0;
/* link them together */
fields->first->next = fields->last;
fields->last->prev = fields->first;
/* now work through the formats */
chp = format;
while (*chp != '\0') {
char *start_pos;
char *start_val;
int strlen_val;
int strlen_pos;
insn_field *new_field;
/* skip leading spaces */
while (isspace(*chp) && *chp != '\n')
chp++;
/* break out the first field (if present) */
start_pos = chp;
while (*chp != '\0'
&& !isspace(*chp)
&& *chp != '.'
&& *chp != ',') {
chp++;
}
strlen_pos = chp - start_pos;
/* break out the second field (if present) */
if (*chp != '.') {
/* assume that the value length specifies the nr of bits */
start_val = start_pos;
strlen_val = strlen_pos;
start_pos = "";
strlen_pos = 0;
}
else {
chp++;
start_val = chp;
if (*chp == '/' || *chp == '*') {
do {
chp++;
} while (*chp == '/' || *chp == '*');
}
else if (isalpha(*start_val)) {
do {
chp++;
} while (isalnum(*chp) || *chp == '_');
}
else if (isdigit(*start_val)) {
do {
chp++;
} while (isalnum(*chp));
}
strlen_val = chp - start_val;
}
/* skip trailing spaces */
while (isspace(*chp))
chp++;
/* verify field finished */
if (*chp == ',')
chp++;
else if (*chp != '\0' || strlen_val == 0) {
error("%s:%d: missing field terminator at %s\n",
entry->file_name, entry->line_nr, chp);
break;
}
/* create a new field and insert it */
new_field = ZALLOC(insn_field);
new_field->next = fields->last;
new_field->prev = fields->last->prev;
new_field->next->prev = new_field;
new_field->prev->next = new_field;
/* the value */
new_field->val_string = (char*)zalloc(strlen_val+1);
strncpy(new_field->val_string, start_val, strlen_val);
if (isdigit(new_field->val_string[0])) {
if (strlen_pos == 0) {
insn_int val = 0;
int i;
for (i = 0; i < strlen_val; i++) {
if (start_val[i] != '0' && start_val[i] != '1')
error("%s:%d: invalid binary field %s\n",
entry->file_name, entry->line_nr, start_val);
val = (val << 1) + (start_val[i] == '1');
}
new_field->val_int = val;
new_field->is_int = 1;
}
else {
new_field->val_int = a2i(new_field->val_string);
new_field->is_int = 1;
}
}
else if (new_field->val_string[0] == '/'
|| new_field->val_string[0] == '*') {
new_field->is_slash = 1;
}
else {
new_field->is_string = 1;
}
/* the pos */
new_field->pos_string = (char*)zalloc(strlen_pos+1);
strncpy(new_field->pos_string, start_pos, strlen_pos);
if (strlen_pos == 0) {
new_field->first = new_field->prev->last + 1;
new_field->width = strlen_val;
new_field->last = new_field->first + new_field->width - 1;
if (new_field->last >= insn_bit_size)
error("%s:%d: Bit position %d exceed instruction bit size (%d)",
entry->file_name, entry->line_nr,
new_field->last, insn_bit_size);
}
else if (insn_specifying_widths) {
new_field->first = new_field->prev->last + 1;
new_field->width = a2i(new_field->pos_string);
new_field->last = new_field->first + new_field->width - 1;
if (new_field->last >= insn_bit_size)
error("%s:%d: Bit position %d exceed instruction bit size (%d)",
entry->file_name, entry->line_nr,
new_field->last, insn_bit_size);
}
else {
new_field->first = target_a2i(hi_bit_nr, new_field->pos_string);
new_field->last = new_field->next->first - 1; /* guess */
new_field->width = new_field->last - new_field->first + 1; /* guess */
new_field->prev->last = new_field->first - 1; /*fix*/
new_field->prev->width = new_field->first - new_field->prev->first; /*fix*/
}
}
/* fiddle first/last so that the sentinals `disapear' */
ASSERT(fields->first->last < 0);
ASSERT(fields->last->first >= insn_bit_size);
fields->first = fields->first->next;
fields->last = fields->last->prev;
/* now go over this again, pointing each bit position at a field
record */
{
int i;
insn_field *field;
field = fields->first;
for (i = 0; i < insn_bit_size; i++) {
while (field->last < i)
field = field->next;
fields->bits[i] = field;
}
}
/* go over each of the fields, and compute a `value' for the insn */
{
insn_field *field;
fields->value = 0;
for (field = fields->first;
field->last < insn_bit_size;
field = field->next) {
fields->value <<= field->width;
if (field->is_int)
fields->value |= field->val_int;
}
}
return fields;
}
static void
model_table_insert(insn_table *table,
table_entry *file_entry)
{
int len;
/* create a new model */
model *new_model = ZALLOC(model);
new_model->name = file_entry->fields[model_identifer];
new_model->printable_name = file_entry->fields[model_name];
new_model->insn_default = file_entry->fields[model_default];
while (*new_model->insn_default && isspace(*new_model->insn_default))
new_model->insn_default++;
len = strlen(new_model->insn_default);
if (max_model_fields_len < len)
max_model_fields_len = len;
/* append it to the end of the model list */
if (last_model)
last_model->next = new_model;
else
models = new_model;
last_model = new_model;
}
static void
model_table_insert_specific(insn_table *table,
table_entry *file_entry,
insn **start_ptr,
insn **end_ptr)
{
insn *ptr = ZALLOC(insn);
ptr->file_entry = file_entry;
if (*end_ptr)
(*end_ptr)->next = ptr;
else
(*start_ptr) = ptr;
(*end_ptr) = ptr;
}
static void
insn_table_insert_function(insn_table *table,
table_entry *file_entry)
{
/* create a new function */
insn *new_function = ZALLOC(insn);
new_function->file_entry = file_entry;
/* append it to the end of the function list */
if (table->last_function)
table->last_function->next = new_function;
else
table->functions = new_function;
table->last_function = new_function;
}
extern void
insn_table_insert_insn(insn_table *table,
table_entry *file_entry,
insn_fields *fields)
{
insn **ptr_to_cur_insn = &table->insns;
insn *cur_insn = *ptr_to_cur_insn;
table_model_entry *insn_model_ptr;
model *model_ptr;
/* create a new instruction */
insn *new_insn = ZALLOC(insn);
new_insn->file_entry = file_entry;
new_insn->fields = fields;
/* Check out any model information returned to make sure the model
is correct. */
for(insn_model_ptr = file_entry->model_first; insn_model_ptr; insn_model_ptr = insn_model_ptr->next) {
char *name = insn_model_ptr->fields[insn_model_name];
int len = strlen (insn_model_ptr->fields[insn_model_fields]);
while (len > 0 && isspace(*insn_model_ptr->fields[insn_model_fields])) {
len--;
insn_model_ptr->fields[insn_model_fields]++;
}
if (max_model_fields_len < len)
max_model_fields_len = len;
for(model_ptr = models; model_ptr; model_ptr = model_ptr->next) {
if (strcmp(name, model_ptr->printable_name) == 0) {
/* Replace the name field with that of the global model, so that when we
want to print it out, we can just compare pointers. */
insn_model_ptr->fields[insn_model_name] = model_ptr->printable_name;
break;
}
}
if (!model_ptr)
error("%s:%d: machine model `%s' was not known about\n",
file_entry->file_name, file_entry->line_nr, name);
}
/* insert it according to the order of the fields */
while (cur_insn != NULL
&& new_insn->fields->value >= cur_insn->fields->value) {
ptr_to_cur_insn = &cur_insn->next;
cur_insn = *ptr_to_cur_insn;
}
new_insn->next = cur_insn;
*ptr_to_cur_insn = new_insn;
table->nr_insn++;
}
insn_table *
load_insn_table(const char *file_name,
decode_table *decode_rules,
filter *filters)
{
table *file = table_open(file_name, nr_insn_table_fields, nr_insn_model_table_fields);
insn_table *table = ZALLOC(insn_table);
table_entry *file_entry;
table->opcode_rule = decode_rules;
while ((file_entry = table_entry_read(file)) != NULL) {
if (it_is("function", file_entry->fields[insn_flags])
|| it_is("internal", file_entry->fields[insn_flags])) {
insn_table_insert_function(table, file_entry);
}
else if (it_is("model", file_entry->fields[insn_flags])) {
model_table_insert(table, file_entry);
}
else if (it_is("model-macro", file_entry->fields[insn_flags])) {
model_table_insert_specific(table, file_entry, &model_macros, &last_model_macro);
}
else if (it_is("model-function", file_entry->fields[insn_flags])) {
model_table_insert_specific(table, file_entry, &model_functions, &last_model_function);
}
else if (it_is("model-internal", file_entry->fields[insn_flags])) {
model_table_insert_specific(table, file_entry, &model_internal, &last_model_internal);
}
else if (it_is("model-static", file_entry->fields[insn_flags])) {
model_table_insert_specific(table, file_entry, &model_static, &last_model_static);
}
else if (it_is("model-data", file_entry->fields[insn_flags])) {
model_table_insert_specific(table, file_entry, &model_data, &last_model_data);
}
else {
insn_fields *fields;
/* skip instructions that aren't relevant to the mode */
if (is_filtered_out(file_entry->fields[insn_flags], filters)) {
fprintf(stderr, "Dropping %s - %s\n",
file_entry->fields[insn_name],
file_entry->fields[insn_flags]);
}
else {
/* create/insert the new instruction */
fields = parse_insn_format(file_entry,
file_entry->fields[insn_format]);
insn_table_insert_insn(table, file_entry, fields);
}
}
}
return table;
}
extern void
insn_table_traverse_tree(insn_table *table,
lf *file,
void *data,
int depth,
leaf_handler *start,
insn_handler *leaf,
leaf_handler *end,
padding_handler *padding)
{
insn_table *entry;
int entry_nr;
ASSERT(table != NULL
&& table->opcode != NULL
&& table->nr_entries > 0
&& table->entries != 0);
if (start != NULL && depth >= 0)
start(table, file, data, depth);
for (entry_nr = 0, entry = table->entries;
entry_nr < (table->opcode->is_boolean
? 2
: (1 << (table->opcode->last - table->opcode->first + 1)));
entry_nr ++) {
if (entry == NULL
|| (!table->opcode->is_boolean
&& entry_nr < entry->opcode_nr)) {
if (padding != NULL && depth >= 0)
padding(table, file, data, depth, entry_nr);
}
else {
ASSERT(entry != NULL && (entry->opcode_nr == entry_nr
|| table->opcode->is_boolean));
if (entry->opcode != NULL && depth != 0) {
insn_table_traverse_tree(entry, file, data, depth+1,
start, leaf, end, padding);
}
else if (depth >= 0) {
if (leaf != NULL)
leaf(entry, file, data, entry->insns, depth);
}
entry = entry->sibling;
}
}
if (end != NULL && depth >= 0)
end(table, file, data, depth);
}
extern void
insn_table_traverse_function(insn_table *table,
lf *file,
void *data,
function_handler *leaf)
{
insn *function;
for (function = table->functions;
function != NULL;
function = function->next) {
leaf(table, file, data, function->file_entry);
}
}
extern void
insn_table_traverse_insn(insn_table *table,
lf *file,
void *data,
insn_handler *handler)
{
insn *instruction;
for (instruction = table->insns;
instruction != NULL;
instruction = instruction->next) {
handler(table, file, data, instruction, 0);
}
}
/****************************************************************/
typedef enum {
field_constant_int = 1,
field_constant_slash = 2,
field_constant_string = 3
} constant_field_types;
static int
insn_field_is_constant(insn_field *field,
decode_table *rule)
{
/* field is an integer */
if (field->is_int)
return field_constant_int;
/* field is `/' and treating that as a constant */
if (field->is_slash && rule->force_slash)
return field_constant_slash;
/* field, though variable is on the list */
if (field->is_string && rule->force_expansion != NULL) {
char *forced_fields = rule->force_expansion;
while (*forced_fields != '\0') {
int field_len;
char *end = strchr(forced_fields, ',');
if (end == NULL)
field_len = strlen(forced_fields);
else
field_len = end-forced_fields;
if (strncmp(forced_fields, field->val_string, field_len) == 0
&& field->val_string[field_len] == '\0')
return field_constant_string;
forced_fields += field_len;
if (*forced_fields == ',')
forced_fields++;
}
}
return 0;
}
static opcode_field *
insn_table_find_opcode_field(insn *insns,
decode_table *rule,
int string_only)
{
opcode_field *curr_opcode = ZALLOC(opcode_field);
insn *entry;
ASSERT(rule);
curr_opcode->first = insn_bit_size;
curr_opcode->last = -1;
for (entry = insns; entry != NULL; entry = entry->next) {
insn_fields *fields = entry->fields;
opcode_field new_opcode;
/* find a start point for the opcode field */
new_opcode.first = rule->first;
while (new_opcode.first <= rule->last
&& (!string_only
|| insn_field_is_constant(fields->bits[new_opcode.first],
rule) != field_constant_string)
&& (string_only
|| !insn_field_is_constant(fields->bits[new_opcode.first],
rule)))
new_opcode.first = fields->bits[new_opcode.first]->last + 1;
ASSERT(new_opcode.first > rule->last
|| (string_only
&& insn_field_is_constant(fields->bits[new_opcode.first],
rule) == field_constant_string)
|| (!string_only
&& insn_field_is_constant(fields->bits[new_opcode.first],
rule)));
/* find the end point for the opcode field */
new_opcode.last = rule->last;
while (new_opcode.last >= rule->first
&& (!string_only
|| insn_field_is_constant(fields->bits[new_opcode.last],
rule) != field_constant_string)
&& (string_only
|| !insn_field_is_constant(fields->bits[new_opcode.last],
rule)))
new_opcode.last = fields->bits[new_opcode.last]->first - 1;
ASSERT(new_opcode.last < rule->first
|| (string_only
&& insn_field_is_constant(fields->bits[new_opcode.last],
rule) == field_constant_string)
|| (!string_only
&& insn_field_is_constant(fields->bits[new_opcode.last],
rule)));
/* now see if our current opcode needs expanding */
if (new_opcode.first <= rule->last
&& curr_opcode->first > new_opcode.first)
curr_opcode->first = new_opcode.first;
if (new_opcode.last >= rule->first
&& curr_opcode->last < new_opcode.last)
curr_opcode->last = new_opcode.last;
}
/* was any thing interesting found? */
if (curr_opcode->first > rule->last) {
ASSERT(curr_opcode->last < rule->first);
return NULL;
}
ASSERT(curr_opcode->last >= rule->first);
ASSERT(curr_opcode->first <= rule->last);
/* if something was found, check it includes the forced field range */
if (!string_only
&& curr_opcode->first > rule->force_first) {
curr_opcode->first = rule->force_first;
}
if (!string_only
&& curr_opcode->last < rule->force_last) {
curr_opcode->last = rule->force_last;
}
/* handle special case elminating any need to do shift after mask */
if (string_only
&& rule->force_last == insn_bit_size-1) {
curr_opcode->last = insn_bit_size-1;
}
/* handle any special cases */
switch (rule->type) {
case normal_decode_rule:
/* let the above apply */
break;
case expand_forced_rule:
/* expand a limited nr of bits, ignoring the rest */
curr_opcode->first = rule->force_first;
curr_opcode->last = rule->force_last;
break;
case boolean_rule:
curr_opcode->is_boolean = 1;
curr_opcode->boolean_constant = rule->special_constant;
break;
default:
error("Something is going wrong\n");
}
return curr_opcode;
}
static void
insn_table_insert_expanded(insn_table *table,
insn *old_insn,
int new_opcode_nr,
insn_bits *new_bits)
{
insn_table **ptr_to_cur_entry = &table->entries;
insn_table *cur_entry = *ptr_to_cur_entry;
/* find the new table for this entry */
while (cur_entry != NULL
&& cur_entry->opcode_nr < new_opcode_nr) {
ptr_to_cur_entry = &cur_entry->sibling;
cur_entry = *ptr_to_cur_entry;
}
if (cur_entry == NULL || cur_entry->opcode_nr != new_opcode_nr) {
insn_table *new_entry = ZALLOC(insn_table);
new_entry->opcode_nr = new_opcode_nr;
new_entry->expanded_bits = new_bits;
new_entry->opcode_rule = table->opcode_rule->next;
new_entry->sibling = cur_entry;
new_entry->parent = table;
*ptr_to_cur_entry = new_entry;
cur_entry = new_entry;
table->nr_entries++;
}
/* ASSERT new_bits == cur_entry bits */
ASSERT(cur_entry != NULL && cur_entry->opcode_nr == new_opcode_nr);
insn_table_insert_insn(cur_entry,
old_insn->file_entry,
old_insn->fields);
}
static void
insn_table_expand_opcode(insn_table *table,
insn *instruction,
int field_nr,
int opcode_nr,
insn_bits *bits)
{
if (field_nr > table->opcode->last) {
insn_table_insert_expanded(table, instruction, opcode_nr, bits);
}
else {
insn_field *field = instruction->fields->bits[field_nr];
if (field->is_int || field->is_slash) {
if (!(field->first >= table->opcode->first
&& field->last <= table->opcode->last))
error("%s:%d: Instruction field %s.%s [%d..%d] overlaps sub-field [%d..%d] boundary",
instruction->file_entry->file_name,
instruction->file_entry->line_nr,
field->pos_string, field->val_string,
field->first, field->last,
table->opcode->first, table->opcode->last);
insn_table_expand_opcode(table, instruction, field->last+1,
((opcode_nr << field->width) + field->val_int),
bits);
}
else {
int val;
int last_pos = ((field->last < table->opcode->last)
? field->last : table->opcode->last);
int first_pos = ((field->first > table->opcode->first)
? field->first : table->opcode->first);
int width = last_pos - first_pos + 1;
int last_val = (table->opcode->is_boolean
? 2 : (1 << width));
for (val = 0; val < last_val; val++) {
insn_bits *new_bits = ZALLOC(insn_bits);
new_bits->field = field;
new_bits->value = val;
new_bits->last = bits;
new_bits->opcode = table->opcode;
insn_table_expand_opcode(table, instruction, last_pos+1,
((opcode_nr << width) | val),
new_bits);
}
}
}
}
static void
insn_table_insert_expanding(insn_table *table,
insn *entry)
{
insn_table_expand_opcode(table,
entry,
table->opcode->first,
0,
table->expanded_bits);
}
extern void
insn_table_expand_insns(insn_table *table)
{
ASSERT(table->nr_insn >= 1);
/* determine a valid opcode */
while (table->opcode_rule) {
/* specials only for single instructions */
if ((table->nr_insn > 1
&& table->opcode_rule->special_mask == 0
&& table->opcode_rule->type == normal_decode_rule)
|| (table->nr_insn == 1
&& table->opcode_rule->special_mask != 0
&& ((table->insns->fields->value
& table->opcode_rule->special_mask)
== table->opcode_rule->special_value))
|| (generate_expanded_instructions
&& table->opcode_rule->special_mask == 0
&& table->opcode_rule->type == normal_decode_rule))
table->opcode =
insn_table_find_opcode_field(table->insns,
table->opcode_rule,
table->nr_insn == 1/*string*/
);
if (table->opcode != NULL)
break;
table->opcode_rule = table->opcode_rule->next;
}
/* did we find anything */
if (table->opcode == NULL) {
return;
}
ASSERT(table->opcode != NULL);
/* back link what we found to its parent */
if (table->parent != NULL) {
ASSERT(table->parent->opcode != NULL);
table->opcode->parent = table->parent->opcode;
}
/* expand the raw instructions according to the opcode */
{
insn *entry;
for (entry = table->insns; entry != NULL; entry = entry->next) {
insn_table_insert_expanding(table, entry);
}
}
/* and do the same for the sub entries */
{
insn_table *entry;
for (entry = table->entries; entry != NULL; entry = entry->sibling) {
insn_table_expand_insns(entry);
}
}
}
#ifdef MAIN
static void
dump_insn_field(insn_field *field,
int indent)
{
printf("(insn_field*)0x%x\n", (unsigned)field);
dumpf(indent, "(first %d)\n", field->first);
dumpf(indent, "(last %d)\n", field->last);
dumpf(indent, "(width %d)\n", field->width);
if (field->is_int)
dumpf(indent, "(is_int %d)\n", field->val_int);
if (field->is_slash)
dumpf(indent, "(is_slash)\n");
if (field->is_string)
dumpf(indent, "(is_string `%s')\n", field->val_string);
dumpf(indent, "(next 0x%x)\n", field->next);
dumpf(indent, "(prev 0x%x)\n", field->prev);
}
static void
dump_insn_fields(insn_fields *fields,
int indent)
{
int i;
printf("(insn_fields*)%p\n", fields);
dumpf(indent, "(first 0x%x)\n", fields->first);
dumpf(indent, "(last 0x%x)\n", fields->last);
dumpf(indent, "(value 0x%x)\n", fields->value);
for (i = 0; i < insn_bit_size; i++) {
dumpf(indent, "(bits[%d] ", i, fields->bits[i]);
dump_insn_field(fields->bits[i], indent+1);
dumpf(indent, " )\n");
}
}
static void
dump_opcode_field(opcode_field *field, int indent, int levels)
{
printf("(opcode_field*)%p\n", field);
if (levels && field != NULL) {
dumpf(indent, "(first %d)\n", field->first);
dumpf(indent, "(last %d)\n", field->last);
dumpf(indent, "(is_boolean %d)\n", field->is_boolean);
dumpf(indent, "(parent ");
dump_opcode_field(field->parent, indent, levels-1);
}
}
static void
dump_insn_bits(insn_bits *bits, int indent, int levels)
{
printf("(insn_bits*)%p\n", bits);
if (levels && bits != NULL) {
dumpf(indent, "(value %d)\n", bits->value);
dumpf(indent, "(opcode ");
dump_opcode_field(bits->opcode, indent+1, 0);
dumpf(indent, " )\n");
dumpf(indent, "(field ");
dump_insn_field(bits->field, indent+1);
dumpf(indent, " )\n");
dumpf(indent, "(last ");
dump_insn_bits(bits->last, indent+1, levels-1);
}
}
static void
dump_insn(insn *entry, int indent, int levels)
{
printf("(insn*)%p\n", entry);
if (levels && entry != NULL) {
dumpf(indent, "(file_entry ");
dump_table_entry(entry->file_entry, indent+1);
dumpf(indent, " )\n");
dumpf(indent, "(fields ");
dump_insn_fields(entry->fields, indent+1);
dumpf(indent, " )\n");
dumpf(indent, "(next ");
dump_insn(entry->next, indent+1, levels-1);
dumpf(indent, " )\n");
}
}
static void
dump_insn_table(insn_table *table,
int indent, int levels)
{
printf("(insn_table*)%p\n", table);
if (levels && table != NULL) {
dumpf(indent, "(opcode_nr %d)\n", table->opcode_nr);
dumpf(indent, "(expanded_bits ");
dump_insn_bits(table->expanded_bits, indent+1, -1);
dumpf(indent, " )\n");
dumpf(indent, "(int nr_insn %d)\n", table->nr_insn);
dumpf(indent, "(insns ");
dump_insn(table->insns, indent+1, table->nr_insn);
dumpf(indent, " )\n");
dumpf(indent, "(opcode_rule ");
dump_decode_rule(table->opcode_rule, indent+1);
dumpf(indent, " )\n");
dumpf(indent, "(opcode ");
dump_opcode_field(table->opcode, indent+1, 1);
dumpf(indent, " )\n");
dumpf(indent, "(nr_entries %d)\n", table->entries);
dumpf(indent, "(entries ");
dump_insn_table(table->entries, indent+1, table->nr_entries);
dumpf(indent, " )\n");
dumpf(indent, "(sibling ", table->sibling);
dump_insn_table(table->sibling, indent+1, levels-1);
dumpf(indent, " )\n");
dumpf(indent, "(parent ", table->parent);
dump_insn_table(table->parent, indent+1, 0);
dumpf(indent, " )\n");
}
}
int insn_bit_size = default_insn_bit_size;
int hi_bit_nr;
int generate_expanded_instructions;
int insn_specifying_widths;
int
main(int argc, char **argv)
{
filter *filters = NULL;
decode_table *decode_rules = NULL;
insn_table *instructions = NULL;
if (argc != 7)
error("Usage: insn <filter-in> <hi-bit-nr> <insn-bit-size> <widths> <decode-table> <insn-table>\n");
filters = new_filter(argv[1], filters);
hi_bit_nr = a2i(argv[2]);
insn_bit_size = a2i(argv[3]);
insn_specifying_widths = a2i(argv[4]);
ASSERT(hi_bit_nr < insn_bit_size);
decode_rules = load_decode_table(argv[5], hi_bit_nr);
instructions = load_insn_table(argv[6], decode_rules, filters);
insn_table_expand_insns(instructions);
dump_insn_table(instructions, 0, -1);
return 0;
}
#endif