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old-cross-binutils/sim/igen/igen.c
Andrew Cagney efe4f1cbf8 Add a simple dissasembler to igen
1997-05-29 07:06:41 +00:00

875 lines
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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 <getopt.h>
#include "misc.h"
#include "lf.h"
#include "table.h"
#include "config.h"
#include "filter.h"
#include "ld-decode.h"
#include "ld-cache.h"
#include "ld-insn.h"
#include "igen.h"
#include "gen-model.h"
#include "gen-icache.h"
#include "gen-itable.h"
#include "gen-idecode.h"
#include "gen-semantics.h"
#include "gen-support.h"
int hi_bit_nr = 0;
int insn_bit_size = default_insn_bit_size;
int insn_specifying_widths = 0;
const char *global_name_prefix = "";
const char *global_uname_prefix = "";
int semantic_zero_reg_nr = 0;
int code = generate_calls;
int generate_expanded_instructions;
int icache_size = 1024;
int generate_smp;
/****************************************************************/
/* Semantic functions */
int
print_semantic_function_formal(lf *file)
{
int nr;
if ((code & generate_with_icache))
nr = lf_printf(file, "SIM_DESC sd,\n %sidecode_cache *cache_entry,\n %sinstruction_address cia",
global_name_prefix, global_name_prefix);
else if (generate_smp)
nr = lf_printf(file, "sim_cpu *cpu,\n %sinstruction_word instruction,\n %sinstruction_address cia",
global_name_prefix, global_name_prefix);
else
nr = lf_printf(file, "SIM_DESC sd,\n %sinstruction_word instruction,\n %sinstruction_address cia",
global_name_prefix, global_name_prefix);
return nr;
}
int
print_semantic_function_actual(lf *file)
{
int nr;
if ((code & generate_with_icache))
nr = lf_printf(file, "sd, cache_entry, cia");
else if (generate_smp)
nr = lf_printf(file, "cpu, instruction, cia");
else
nr = lf_printf(file, "sd, instruction, cia");
return nr;
}
int
print_semantic_function_type(lf *file)
{
int nr;
nr = lf_printf(file, "%sinstruction_address", global_name_prefix);
return nr;
}
/* Idecode functions */
int
print_icache_function_formal(lf *file)
{
int nr = 0;
if (generate_smp)
nr += lf_printf(file, "sim_cpu *cpu,\n");
else
nr += lf_printf(file, "SIM_DESC sd,\n");
nr += lf_printf(file, " %sinstruction_word instruction,\n", global_name_prefix);
nr += lf_printf(file, " %sinstruction_address cia,\n", global_name_prefix);
nr += lf_printf(file, " %sidecode_cache *cache_entry", global_name_prefix);
return nr;
}
int
print_icache_function_actual(lf *file)
{
int nr;
if (generate_smp)
nr = lf_printf(file, "cpu, instruction, cia, cache_entry");
else
nr = lf_printf(file, "sd, instruction, cia, cache_entry");
return nr;
}
int
print_icache_function_type(lf *file)
{
int nr;
if ((code & generate_with_semantic_icache))
nr = print_semantic_function_type(file);
else
nr = lf_printf(file, "%sidecode_semantic *", global_name_prefix);
return nr;
}
/* Function names */
static int
print_insn_bits(lf *file, insn_bits *bits)
{
int nr = 0;
if (bits == NULL)
return nr;
nr += print_insn_bits(file, bits->last);
nr += lf_putchr(file, '_');
nr += lf_putstr(file, bits->field->val_string);
if (bits->opcode->is_boolean && bits->value == 0)
nr += lf_putint(file, bits->opcode->boolean_constant);
else if (!bits->opcode->is_boolean) {
if (bits->opcode->last < bits->field->last)
nr += lf_putint(file, bits->value << (bits->field->last - bits->opcode->last));
else
nr += lf_putint(file, bits->value);
}
return nr;
}
extern int
print_function_name(lf *file,
const char *basename,
insn_bits *expanded_bits,
lf_function_name_prefixes prefix)
{
int nr = 0;
/* the prefix */
switch (prefix) {
case function_name_prefix_semantics:
nr += lf_putstr(file, global_name_prefix);
nr += lf_putstr(file, "semantic_");
break;
case function_name_prefix_idecode:
nr += lf_putstr(file, global_name_prefix);
nr += lf_printf(file, "idecode_");
break;
case function_name_prefix_itable:
nr += lf_putstr(file, "itable_");
break;
case function_name_prefix_icache:
nr += lf_putstr(file, global_name_prefix);
nr += lf_putstr(file, "icache_");
break;
default:
break;
}
/* the function name */
{
const char *pos;
for (pos = basename;
*pos != '\0';
pos++) {
switch (*pos) {
case '/':
case '-':
break;
case ' ':
case '.':
nr += lf_putchr(file, '_');
break;
default:
nr += lf_putchr(file, *pos);
break;
}
}
}
/* the suffix */
if (generate_expanded_instructions)
nr += print_insn_bits(file, expanded_bits);
return nr;
}
void
print_my_defines (lf *file,
insn_bits *expanded_bits,
table_entry *file_entry)
{
/* #define MY_INDEX xxxxx */
lf_indent_suppress (file);
lf_printf (file, "#undef MY_INDEX\n");
lf_indent_suppress (file);
lf_printf (file, "#define MY_INDEX ");
print_function_name (file,
file_entry->fields[insn_name],
NULL,
function_name_prefix_itable);
lf_printf (file, "\n");
/* #define MY_PREFIX xxxxxx */
lf_indent_suppress (file);
lf_printf (file, "#undef MY_PREFIX\n");
lf_indent_suppress (file);
lf_printf (file, "#define MY_PREFIX ");
print_function_name (file,
file_entry->fields[insn_name],
expanded_bits,
function_name_prefix_none);
lf_printf (file, "\n");
}
static int
print_itrace_prefix (lf *file,
table_entry *file_entry,
const char *phase_lc)
{
const char *prefix = "trace_one_insn (";
int indent = strlen (prefix);
lf_printf (file, "%sSD, CPU, %s, TRACE_LINENUM_P (CPU),\n",
prefix, (code & generate_with_semantic_delayed_branch) ? "cia.ip" : "cia");
lf_indent (file, +indent);
lf_printf (file, "itable[MY_INDEX].file,\n");
lf_printf (file, "itable[MY_INDEX].line_nr,\n");
lf_printf (file, "\"%s\",\n", phase_lc);
return indent;
}
static void
print_itrace_format (lf *file,
table_assembler_entry *assembler)
{
/* pass=1 is fmt string; pass=2 is is arguments */
int pass;
const char *chp;
/* print the format string */
for (pass = 1; pass <= 2; pass++)
{
const char *chp = assembler->format;
chp++; /* skip the leading quote */
/* prefix the format with the insn `name' */
if (pass == 1)
{
lf_printf (file, "\"%%s - %%s - ");
}
else
{
lf_printf (file, ",\n");
lf_printf (file, "itable[MY_INDEX].name");
lf_printf (file, ",\n");
lf_printf (file, "XSTRING(MY_PREFIX)");
}
/* write out the format/args */
while (*chp != '\0')
{
if (chp[0] == '\\' && (chp[1] == '<' || chp[1] == '>'))
{
if (pass == 1)
lf_putchr (file, chp[1]);
chp += 2;
}
else if (chp[0] == '<' || chp[0] == '%')
{
/* parse [ "%" ... ] "<" [ func "#" ] param ">" */
const char *fmt;
const char *func;
int strlen_func;
const char *param;
int strlen_param;
/* the "%" ... "<" format */
fmt = chp;
while (chp[0] != '<' && chp[0] != '\0')
chp++;
if (chp[0] != '<')
error ("%s:%d: Missing `<' after `%%'",
assembler->file_name,
assembler->line_nr);
chp++;
/* [ "func" # ] OR "param" */
func = chp;
param = chp;
while (chp[0] != '>' && chp[0] != '#' && chp[0] != '\0')
chp++;
strlen_func = chp - func;
if (chp[0] == '#')
{
chp++;
param = chp;
while (chp[0] != '>' && chp[0] != '\0')
chp++;
}
strlen_param = chp - param;
if (chp[0] != '>')
error ("%s:%d: Missing closing `>' in assembler string",
assembler->file_name,
assembler->line_nr);
chp++;
/* now process it */
if (pass == 2)
lf_printf (file, ",\n");
if (strncmp (fmt, "<", 1) == 0)
/* implicit long int format */
{
if (pass == 1)
lf_printf (file, "%%ld");
else
{
lf_printf (file, "(long) ");
lf_write (file, param, strlen_param);
}
}
else if (strncmp (fmt, "%<", 2) == 0)
/* explicit format */
{
if (pass == 1)
lf_printf (file, "%%");
else
lf_write (file, param, strlen_param);
}
else if (strncmp (fmt, "%s<", 3) == 0)
/* string format */
{
if (pass == 1)
lf_printf (file, "%%s");
else
{
lf_printf (file, "%sstr_", global_name_prefix);
lf_write (file, func, strlen_func);
lf_printf (file, " (_SD, ");
lf_write (file, param, strlen_param);
lf_printf (file, ")");
}
}
else if (strncmp (fmt, "%lx<", 4) == 0)
/* simple hex */
{
if (pass == 1)
lf_printf (file, "%%lx");
else
{
lf_printf (file, "(unsigned long) ");
lf_write (file, param, strlen_param);
}
}
else if (strncmp (fmt, "%08lx<", 6) == 0)
/* simple hex */
{
if (pass == 1)
lf_printf (file, "%%08lx");
else
{
lf_printf (file, "(unsigned long) ");
lf_write (file, param, strlen_param);
}
}
else
error ("%s:%d: Unknown assembler string format",
assembler->file_name,
assembler->line_nr);
}
else
{
if (pass == 1)
lf_putchr (file, chp[0]);
chp += 1;
}
}
}
lf_printf (file, ");\n");
}
void
print_itrace (lf *file,
table_entry *file_entry,
int idecode)
{
const char *phase = (idecode) ? "DECODE" : "INSN";
const char *phase_lc = (idecode) ? "decode" : "insn";
lf_printf (file, "\n");
lf_indent_suppress (file);
lf_printf (file, "#if defined (WITH_TRACE)\n");
lf_printf (file, "/* trace the instructions execution if enabled */\n");
lf_printf (file, "if (TRACE_%s_P (CPU)) {\n", phase);
lf_indent (file, +2);
if (file_entry->assembler != NULL)
{
table_assembler_entry *assembler = file_entry->assembler;
int is_first = 1;
do
{
if (assembler->condition != NULL)
{
int indent;
lf_printf (file, "%sif (%s)\n",
is_first ? "" : "else ",
assembler->condition);
lf_indent (file, +2);
indent = print_itrace_prefix (file, file_entry, phase_lc);
print_itrace_format (file, assembler);
lf_indent (file, -indent);
lf_indent (file, -2);
if (assembler->next == NULL)
error ("%s:%d: Missing final unconditional assembler",
assembler->file_name,
assembler->line_nr);
}
else
{
int indent;
if (!is_first)
{
lf_printf (file, "else\n");
lf_indent (file, +2);
}
indent = print_itrace_prefix (file, file_entry, phase_lc);
print_itrace_format (file, assembler);
lf_indent (file, -indent);
if (!is_first)
lf_indent (file, -2);
if (assembler->next != NULL)
error ("%s:%d: Unconditional assembler is not last",
assembler->file_name,
assembler->line_nr);
}
is_first = 0;
assembler = assembler->next;
}
while (assembler != NULL);
}
else
{
int indent = print_itrace_prefix (file, file_entry, phase_lc);
lf_printf (file, "\"%%s - %%s - ?\",\n");
lf_printf (file, "itable[MY_INDEX].name,\n");
lf_printf (file, "XSTRING(MY_PREFIX));\n");
lf_indent (file, -indent);
}
lf_indent (file, -2);
lf_printf (file, "}\n");
lf_indent_suppress (file);
lf_printf (file, "#endif\n");
}
/****************************************************************/
static void
gen_semantics_h(insn_table *table,
lf *file,
igen_code generate)
{
lf_printf(file, "typedef ");
print_semantic_function_type(file);
lf_printf(file, " %sidecode_semantic\n(", global_name_prefix);
print_semantic_function_formal(file);
lf_printf(file, ");\n");
lf_printf(file, "\n");
if ((code & generate_calls)) {
if (generate_expanded_instructions)
insn_table_traverse_tree(table,
file, NULL,
1,
NULL, /* start */
print_semantic_declaration, /* leaf */
NULL, /* end */
NULL); /* padding */
else
insn_table_traverse_insn(table,
file, NULL,
print_semantic_declaration);
}
else {
lf_print__this_file_is_empty(file);
}
}
static void
gen_semantics_c(insn_table *table,
cache_table *cache_rules,
lf *file,
igen_code generate)
{
if ((code & generate_calls)) {
lf_printf(file, "\n");
lf_printf(file, "#include \"sim-main.h\"\n");
lf_printf(file, "#include \"%sidecode.h\"\n", global_name_prefix);
lf_printf(file, "#include \"%ssemantics.h\"\n", global_name_prefix);
lf_printf(file, "#include \"%ssupport.h\"\n", global_name_prefix);
lf_printf(file, "\n");
if (generate_expanded_instructions)
insn_table_traverse_tree(table,
file, cache_rules,
1,
NULL, /* start */
print_semantic_definition, /* leaf */
NULL, /* end */
NULL); /* padding */
else
insn_table_traverse_insn(table,
file, cache_rules,
print_semantic_definition);
}
else {
lf_print__this_file_is_empty(file);
}
}
/****************************************************************/
static void
gen_icache_h(insn_table *table,
lf *file,
igen_code generate)
{
lf_printf(file, "typedef ");
print_icache_function_type(file);
lf_printf(file, " %sidecode_icache\n(", global_name_prefix);
print_icache_function_formal(file);
lf_printf(file, ");\n");
lf_printf(file, "\n");
if ((code & generate_calls)
&& (code & generate_with_icache)) {
insn_table_traverse_function(table,
file, NULL,
print_icache_internal_function_declaration);
if (generate_expanded_instructions)
insn_table_traverse_tree(table,
file, NULL,
1,
NULL, /* start */
print_icache_declaration, /* leaf */
NULL, /* end */
NULL); /* padding */
else
insn_table_traverse_insn(table,
file, NULL,
print_icache_declaration);
}
else {
lf_print__this_file_is_empty(file);
}
}
static void
gen_icache_c(insn_table *table,
cache_table *cache_rules,
lf *file,
igen_code generate)
{
/* output `internal' invalid/floating-point unavailable functions
where needed */
if ((code & generate_calls)
&& (code & generate_with_icache)) {
lf_printf(file, "\n");
lf_printf(file, "#include \"cpu.h\"\n");
lf_printf(file, "#include \"idecode.h\"\n");
lf_printf(file, "#include \"semantics.h\"\n");
lf_printf(file, "#include \"icache.h\"\n");
lf_printf(file, "#include \"support.h\"\n");
lf_printf(file, "\n");
insn_table_traverse_function(table,
file, NULL,
print_icache_internal_function_definition);
lf_printf(file, "\n");
if (generate_expanded_instructions)
insn_table_traverse_tree(table,
file, cache_rules,
1,
NULL, /* start */
print_icache_definition, /* leaf */
NULL, /* end */
NULL); /* padding */
else
insn_table_traverse_insn(table,
file, cache_rules,
print_icache_definition);
}
else {
lf_print__this_file_is_empty(file);
}
}
/****************************************************************/
int
main(int argc,
char **argv,
char **envp)
{
cache_table *cache_rules = NULL;
lf_file_references file_references = lf_include_references;
decode_table *decode_rules = NULL;
filter *filters = NULL;
insn_table *instructions = NULL;
char *real_file_name = NULL;
int is_header = 0;
int ch;
if (argc == 1) {
printf("Usage:\n");
printf(" igen <config-opts> ... <input-opts>... <output-opts>...\n");
printf("Config options:\n");
printf(" -F <filter-flag> eg -F 32 to include 32bit instructions\n");
printf(" -I <icache-size> Specify size of cracking cache\n");
printf(" -B <bit-size> Set the number of bits in an instruction\n");
printf(" -H <high-bit> Set the number of the high (msb) instruction bit\n");
printf(" -N <nr-cpus> Specify the max number of cpus the simulation will support\n");
printf(" -T <mechanism> Override the decode mechanism specified by the decode rules\n");
printf(" -P <prefix> Prepend all functions with the specified prefix\n");
printf(" -G <gen-option> Any of the following options:\n");
printf(" field-widths - instruction table specifies widths (not ofsesets)\n");
printf(" jumps - use jumps instead of function calls\n");
printf(" duplicate - expand (duplicate) semantic functions\n");
printf(" omit-line-numbers - do not include line nr info in output\n");
printf(" direct-access - use #defines to directly access values\n");
printf(" icache - generate an instruction cracking cache\n");
printf(" semantic-icache - include semantic code in cracking functions\n");
printf(" insn-in-icache - save original instruction when cracking\n");
printf(" default-nia-minus-one - instead of cia + insn-size\n");
printf(" delayed-branch - instead of cia + insn-size\n");
printf(" zero-r<N> - arch assumes GPR(<N>) == 0, keep it that way\n");
printf(" conditional-issue - conditionally issue each instruction\n");
printf(" validate-slot - perform slot verification as part of decode\n");
printf("\n");
printf("Input options:\n");
printf(" -o <decode-rules>\n");
printf(" -k <cache-rules>\n");
printf(" -i <instruction-table>\n");
printf("\n");
printf("Output options:\n");
printf(" -n <real-name> Specify the real name of the next output file\n");
printf(" -h Generate header file\n");
printf(" -c <output-file> output icache\n");
printf(" -d <output-file> output idecode\n");
printf(" -e <output-file> output engine\n");
printf(" -f <output-file> output support functions\n");
printf(" -m <output-file> output model\n");
printf(" -s <output-file> output schematic\n");
printf(" -t <output-file> output itable\n");
}
while ((ch = getopt(argc, argv,
"F:I:B:H:N:T:P:G:o:k:i:n:hc:d:e:m:s:t:f:"))
!= -1) {
fprintf(stderr, "\t-%c %s\n", ch, (optarg ? optarg : ""));
switch(ch) {
case 'F':
filters = new_filter(optarg, filters);
break;
case 'I':
icache_size = a2i(optarg);
code |= generate_with_icache;
break;
case 'B':
insn_bit_size = a2i(optarg);
ASSERT(insn_bit_size > 0 && insn_bit_size <= max_insn_bit_size
&& (hi_bit_nr == insn_bit_size-1 || hi_bit_nr == 0));
break;
case 'H':
hi_bit_nr = a2i(optarg);
ASSERT(hi_bit_nr == insn_bit_size-1 || hi_bit_nr == 0);
break;
case 'N':
generate_smp = a2i(optarg);
break;
case 'T':
force_decode_gen_type(optarg);
break;
case 'P':
{
char *chp;
global_name_prefix = strdup(optarg);
chp = strdup(optarg);
global_uname_prefix = chp;
while (*chp) {
if (islower(*chp))
*chp = toupper(*chp);
chp++;
}
}
break;
case 'G':
if (strcmp(optarg, "jumps") == 0) {
code &= ~generate_calls;
code |= generate_jumps;
}
else if (strcmp(optarg, "field-widths") == 0) {
insn_specifying_widths = 1;
}
else if (strcmp(optarg, "duplicate") == 0) {
generate_expanded_instructions = 1;
}
else if (strcmp(optarg, "omit-line-numbers") == 0) {
file_references = lf_omit_references;
}
else if (strcmp(optarg, "direct-access") == 0) {
code |= generate_with_direct_access;
}
else if (strcmp(optarg, "icache") == 0) {
}
else if (strcmp(optarg, "semantic-icache") == 0) {
code |= generate_with_icache;
code |= generate_with_semantic_icache;
}
else if (strcmp(optarg, "insn-in-icache") == 0) {
code |= generate_with_icache;
code |= generate_with_insn_in_icache;
}
else if (strcmp(optarg, "default-nia-minus-one") == 0) {
code |= generate_with_semantic_returning_modified_nia_only;
code &= ~generate_with_semantic_delayed_branch;
}
else if (strcmp(optarg, "delayed-branch") == 0) {
code |= generate_with_semantic_delayed_branch;
code &= ~generate_with_semantic_returning_modified_nia_only;
}
else if (strcmp(optarg, "conditional-issue") == 0) {
code |= generate_with_semantic_conditional_issue;
}
else if (strncmp (optarg, "zero-r", strlen ("zero-r")) == 0) {
code |= generate_with_semantic_zero_reg;
semantic_zero_reg_nr = atoi (optarg + strlen ("zero-r"));
}
else if (strcmp(optarg, "verify-slot") == 0) {
code |= generate_with_idecode_slot_verification;
}
else
error("Unknown option %s", optarg);
break;
case 'i':
if (decode_rules == NULL || cache_rules == NULL) {
fprintf(stderr, "Must specify decode and cache tables\n");
exit (1);
}
instructions = load_insn_table(optarg, decode_rules, filters);
fprintf(stderr, "\texpanding ...\n");
insn_table_expand_insns(instructions);
break;
case 'o':
decode_rules = load_decode_table(optarg, hi_bit_nr);
break;
case 'k':
cache_rules = load_cache_table(optarg, hi_bit_nr);
break;
case 'n':
real_file_name = strdup(optarg);
break;
case 'h':
is_header = 1;
break;
case 's':
case 'd':
case 'e':
case 'm':
case 't':
case 'f':
case 'c':
{
lf *file = lf_open(optarg, real_file_name, file_references,
(is_header ? lf_is_h : lf_is_c),
argv[0]);
lf_print__file_start(file);
ASSERT(instructions != NULL);
switch (ch) {
case 's':
if(is_header)
gen_semantics_h(instructions, file, code);
else
gen_semantics_c(instructions, cache_rules, file, code);
break;
case 'd':
if (is_header)
gen_idecode_h(file, instructions, cache_rules);
else
gen_idecode_c(file, instructions, cache_rules);
break;
case 'e':
if (is_header)
gen_engine_h(file, instructions, cache_rules);
else
gen_engine_c(file, instructions, cache_rules);
break;
case 'm':
if (is_header)
gen_model_h(instructions, file);
else
gen_model_c(instructions, file);
break;
case 't':
if (is_header)
gen_itable_h(instructions, file);
else
gen_itable_c(instructions, file);
break;
case 'f':
if (is_header)
gen_support_h(instructions, file);
else
gen_support_c(instructions, file);
break;
case 'c':
if (is_header)
gen_icache_h(instructions, file, code);
else
gen_icache_c(instructions, cache_rules, file, code);
break;
}
lf_print__file_finish(file);
lf_close(file);
is_header = 0;
}
real_file_name = NULL;
break;
default:
error("unknown option\n");
}
}
return 0;
}
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