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gnu / binutils-gdb / ae66a8f19ef6bf2dc7369cf26073f34ddf7c175b / . / sim / igen / igen.c
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/* The IGEN simulator generator for GDB, the GNU Debugger.
Copyright 2002-2021 Free Software Foundation, Inc.
Contributed by Andrew Cagney.
This file is part of GDB.
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 3 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, see <http://www.gnu.org/licenses/>. */
#include <getopt.h>
#include <stdlib.h>
#include "misc.h"
#include "lf.h"
#include "table.h"
#include "filter.h"
#include "igen.h"
#include "ld-insn.h"
#include "ld-decode.h"
#include "ld-cache.h"
#include "gen.h"
#include "gen-model.h"
#include "gen-icache.h"
#include "gen-itable.h"
#include "gen-idecode.h"
#include "gen-semantics.h"
#include "gen-engine.h"
#include "gen-support.h"
#include "gen-engine.h"
/****************************************************************/
/* Semantic functions */
int
print_semantic_function_formal (lf *file, int nr_prefetched_words)
{
int nr = 0;
int word_nr;
if (options.gen.icache || nr_prefetched_words < 0)
{
nr += lf_printf (file, "SIM_DESC sd,\n");
nr += lf_printf (file, "%sidecode_cache *cache_entry,\n",
options.module.global.prefix.l);
nr += lf_printf (file, "%sinstruction_address cia",
options.module.global.prefix.l);
}
else if (options.gen.smp)
{
nr += lf_printf (file, "sim_cpu *cpu,\n");
for (word_nr = 0; word_nr < nr_prefetched_words; word_nr++)
{
nr += lf_printf (file, "%sinstruction_word instruction_%d,\n",
options.module.global.prefix.l, word_nr);
}
nr += lf_printf (file, "%sinstruction_address cia",
options.module.global.prefix.l);
}
else
{
nr += lf_printf (file, "SIM_DESC sd,\n");
for (word_nr = 0; word_nr < nr_prefetched_words; word_nr++)
{
nr += lf_printf (file, "%sinstruction_word instruction_%d,\n",
options.module.global.prefix.l, word_nr);
}
nr += lf_printf (file, "%sinstruction_address cia",
options.module.global.prefix.l);
}
return nr;
}
int
print_semantic_function_actual (lf *file, int nr_prefetched_words)
{
int nr = 0;
int word_nr;
if (options.gen.icache || nr_prefetched_words < 0)
{
nr += lf_printf (file, "sd, cache_entry, cia");
}
else
{
if (options.gen.smp)
nr += lf_printf (file, "cpu");
else
nr += lf_printf (file, "sd");
for (word_nr = 0; word_nr < nr_prefetched_words; word_nr++)
nr += lf_printf (file, ", instruction_%d", word_nr);
nr += lf_printf (file, ", cia");
}
return nr;
}
int
print_semantic_function_type (lf *file)
{
int nr = 0;
nr += lf_printf (file, "%sinstruction_address",
options.module.global.prefix.l);
return nr;
}
/* Idecode functions */
int
print_icache_function_formal (lf *file, int nr_prefetched_words)
{
int nr = 0;
int word_nr;
if (options.gen.smp)
nr += lf_printf (file, "sim_cpu *cpu,\n");
else
nr += lf_printf (file, "SIM_DESC sd,\n");
for (word_nr = 0; word_nr < nr_prefetched_words; word_nr++)
nr += lf_printf (file, " %sinstruction_word instruction_%d,\n",
options.module.global.prefix.l, word_nr);
nr += lf_printf (file, " %sinstruction_address cia,\n",
options.module.global.prefix.l);
nr += lf_printf (file, " %sidecode_cache *cache_entry",
options.module.global.prefix.l);
return nr;
}
int
print_icache_function_actual (lf *file, int nr_prefetched_words)
{
int nr = 0;
int word_nr;
if (options.gen.smp)
nr += lf_printf (file, "cpu");
else
nr += lf_printf (file, "sd");
for (word_nr = 0; word_nr < nr_prefetched_words; word_nr++)
nr += lf_printf (file, ", instruction_%d", word_nr);
nr += lf_printf (file, ", cia, cache_entry");
return nr;
}
int
print_icache_function_type (lf *file)
{
int nr;
if (options.gen.semantic_icache)
{
nr = print_semantic_function_type (file);
}
else
{
nr = lf_printf (file, "%sidecode_semantic *",
options.module.global.prefix.l);
}
return nr;
}
/* Function names */
static int
print_opcode_bits (lf *file, opcode_bits *bits)
{
int nr = 0;
if (bits == NULL)
return nr;
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);
}
nr += print_opcode_bits (file, bits->next);
return nr;
}
static int
print_c_name (lf *file, const char *name)
{
int nr = 0;
const char *pos;
for (pos = name; *pos != '\0'; pos++)
{
switch (*pos)
{
case '/':
case '-':
break;
case ' ':
case '.':
nr += lf_putchr (file, '_');
break;
default:
nr += lf_putchr (file, *pos);
break;
}
}
return nr;
}
extern int
print_function_name (lf *file,
const char *basename,
const char *format_name,
const char *model_name,
opcode_bits *expanded_bits,
lf_function_name_prefixes prefix)
{
int nr = 0;
/* the prefix */
switch (prefix)
{
case function_name_prefix_semantics:
nr += lf_printf (file, "%s", options.module.semantics.prefix.l);
nr += lf_printf (file, "semantic_");
break;
case function_name_prefix_idecode:
nr += lf_printf (file, "%s", options.module.idecode.prefix.l);
nr += lf_printf (file, "idecode_");
break;
case function_name_prefix_itable:
nr += lf_printf (file, "%sitable_", options.module.itable.prefix.l);
break;
case function_name_prefix_icache:
nr += lf_printf (file, "%s", options.module.icache.prefix.l);
nr += lf_printf (file, "icache_");
break;
case function_name_prefix_engine:
nr += lf_printf (file, "%s", options.module.engine.prefix.l);
nr += lf_printf (file, "engine_");
default:
break;
}
if (model_name != NULL)
{
nr += print_c_name (file, model_name);
nr += lf_printf (file, "_");
}
/* the function name */
nr += print_c_name (file, basename);
/* the format name if available */
if (format_name != NULL)
{
nr += lf_printf (file, "_");
nr += print_c_name (file, format_name);
}
/* the suffix */
nr += print_opcode_bits (file, expanded_bits);
return nr;
}
void
print_my_defines (lf *file,
const char *basename,
const char *format_name, opcode_bits *expanded_bits)
{
/* #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,
basename, format_name, NULL,
NULL, function_name_prefix_itable);
lf_printf (file, "\n");
/* #define MY_PREFIX xxxxxx */
lf_indent_suppress (file);
lf_printf (file, "#undef ");
print_function_name (file,
basename, format_name, NULL,
expanded_bits, function_name_prefix_none);
lf_printf (file, "\n");
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,
basename, format_name, NULL,
expanded_bits, function_name_prefix_none);
lf_printf (file, "\n");
/* #define MY_NAME xxxxxx */
lf_indent_suppress (file);
lf_indent_suppress (file);
lf_printf (file, "#undef MY_NAME\n");
lf_indent_suppress (file);
lf_printf (file, "#define MY_NAME \"");
print_function_name (file,
basename, format_name, NULL,
expanded_bits, function_name_prefix_none);
lf_printf (file, "\"\n");
}
static int
print_itrace_prefix (lf *file)
{
const char *prefix = "trace_prefix (";
int indent = strlen (prefix);
lf_printf (file, "%sSD, CPU, cia, CIA, TRACE_LINENUM_P (CPU), \\\n",
prefix);
lf_indent (file, +indent);
lf_printf (file, "%sitable[MY_INDEX].file, \\\n",
options.module.itable.prefix.l);
lf_printf (file, "%sitable[MY_INDEX].line_nr, \\\n",
options.module.itable.prefix.l);
lf_printf (file, "\"");
return indent;
}
static void
print_itrace_format (lf *file, insn_mnemonic_entry *assembler)
{
/* pass=1 is fmt string; pass=2 is arguments */
int pass;
/* print the format string */
for (pass = 1; pass <= 2; pass++)
{
const char *chp = assembler->format;
chp++; /* skip the leading quote */
/* 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 (assembler->line, "Missing `<' after `%%'\n");
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 (assembler->line,
"Missing closing `>' in assembler string\n");
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_",
options.module.global.prefix.l);
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, "%#lx<", 5) == 0)
/* simple hex with 0x prefix */
{
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 (assembler->line, "Unknown assembler string format\n");
}
else
{
if (pass == 1)
lf_putchr (file, chp[0]);
chp += 1;
}
}
}
lf_printf (file, ");\n");
}
void
print_itrace (lf *file, insn_entry * insn, int idecode)
{
/* NB: Here we escape each EOLN. This is so that the the compiler
treats a trace function call as a single line. Consequently any
errors in the line are refered back to the same igen assembler
source line */
const char *phase = (idecode) ? "DECODE" : "INSN";
lf_printf (file, "\n");
lf_indent_suppress (file);
lf_printf (file, "#if defined (WITH_TRACE)\n");
lf_printf (file, "/* generate a trace prefix if any tracing enabled */\n");
lf_printf (file, "if (TRACE_ANY_P (CPU))\n");
lf_printf (file, " {\n");
lf_indent (file, +4);
{
if (insn->mnemonics != NULL)
{
insn_mnemonic_entry *assembler = insn->mnemonics;
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);
lf_print__line_ref (file, assembler->line);
indent = print_itrace_prefix (file);
print_itrace_format (file, assembler);
lf_print__internal_ref (file);
lf_indent (file, -indent);
lf_indent (file, -2);
if (assembler->next == NULL)
error (assembler->line,
"Missing final unconditional assembler\n");
}
else
{
int indent;
if (!is_first)
{
lf_printf (file, "else\n");
lf_indent (file, +2);
}
lf_print__line_ref (file, assembler->line);
indent = print_itrace_prefix (file);
print_itrace_format (file, assembler);
lf_print__internal_ref (file);
lf_indent (file, -indent);
if (!is_first)
lf_indent (file, -2);
if (assembler->next != NULL)
error (assembler->line,
"Unconditional assembler is not last\n");
}
is_first = 0;
assembler = assembler->next;
}
while (assembler != NULL);
}
else
{
int indent;
lf_indent (file, +2);
lf_print__line_ref (file, insn->line);
indent = print_itrace_prefix (file);
lf_printf (file, "%%s\", \\\n");
lf_printf (file, "itable[MY_INDEX].name);\n");
lf_print__internal_ref (file);
lf_indent (file, -indent);
lf_indent (file, -2);
}
lf_printf (file, "/* trace the instruction execution if enabled */\n");
lf_printf (file, "if (TRACE_%s_P (CPU))\n", phase);
lf_printf (file,
" trace_generic (SD, CPU, TRACE_%s_IDX, \" %%s\", itable[MY_INDEX].name);\n",
phase);
}
lf_indent (file, -4);
lf_printf (file, " }\n");
lf_indent_suppress (file);
lf_printf (file, "#endif\n");
}
void
print_sim_engine_abort (lf *file, const char *message)
{
lf_printf (file, "sim_engine_abort (SD, CPU, cia, ");
lf_printf (file, "\"%s\"", message);
lf_printf (file, ");\n");
}
void
print_include (lf *file, igen_module module)
{
lf_printf (file, "#include \"%s%s.h\"\n", module.prefix.l, module.suffix.l);
}
void
print_include_inline (lf *file, igen_module module)
{
lf_printf (file, "#if C_REVEALS_MODULE_P (%s_INLINE)\n", module.suffix.u);
lf_printf (file, "#include \"%s%s.c\"\n", module.prefix.l, module.suffix.l);
lf_printf (file, "#else\n");
print_include (file, module);
lf_printf (file, "#endif\n");
lf_printf (file, "\n");
}
void
print_includes (lf *file)
{
lf_printf (file, "\n");
lf_printf (file, "#include \"sim-inline.c\"\n");
lf_printf (file, "\n");
print_include_inline (file, options.module.itable);
print_include_inline (file, options.module.idecode);
print_include_inline (file, options.module.support);
}
/****************************************************************/
static void
gen_semantics_h (lf *file, insn_list *semantics, int max_nr_words)
{
int word_nr;
insn_list *semantic;
for (word_nr = -1; word_nr <= max_nr_words; word_nr++)
{
lf_printf (file, "typedef ");
print_semantic_function_type (file);
lf_printf (file, " %sidecode_semantic", options.module.global.prefix.l);
if (word_nr >= 0)
lf_printf (file, "_%d", word_nr);
lf_printf (file, "\n(");
lf_indent (file, +1);
print_semantic_function_formal (file, word_nr);
lf_indent (file, -1);
lf_printf (file, ");\n");
lf_printf (file, "\n");
}
switch (options.gen.code)
{
case generate_calls:
for (semantic = semantics; semantic != NULL; semantic = semantic->next)
{
/* Ignore any special/internal instructions */
if (semantic->insn->nr_words == 0)
continue;
print_semantic_declaration (file,
semantic->insn,
semantic->expanded_bits,
semantic->opcodes,
semantic->nr_prefetched_words);
}
break;
case generate_jumps:
lf_print__this_file_is_empty (file, "generating jumps");
break;
}
}
static void
gen_semantics_c (lf *file, insn_list *semantics, cache_entry *cache_rules)
{
if (options.gen.code == generate_calls)
{
insn_list *semantic;
print_includes (file);
print_include (file, options.module.semantics);
lf_printf (file, "\n");
for (semantic = semantics; semantic != NULL; semantic = semantic->next)
{
/* Ignore any special/internal instructions */
if (semantic->insn->nr_words == 0)
continue;
print_semantic_definition (file,
semantic->insn,
semantic->expanded_bits,
semantic->opcodes,
cache_rules,
semantic->nr_prefetched_words);
}
}
else
{
lf_print__this_file_is_empty (file, "generating jump engine");
}
}
/****************************************************************/
static void
gen_icache_h (lf *file,
insn_list *semantic,
function_entry * functions, int max_nr_words)
{
int word_nr;
for (word_nr = 0; word_nr <= max_nr_words; word_nr++)
{
lf_printf (file, "typedef ");
print_icache_function_type (file);
lf_printf (file, " %sidecode_icache_%d\n(",
options.module.global.prefix.l, word_nr);
print_icache_function_formal (file, word_nr);
lf_printf (file, ");\n");
lf_printf (file, "\n");
}
if (options.gen.code == generate_calls && options.gen.icache)
{
function_entry_traverse (file, functions,
print_icache_internal_function_declaration,
NULL);
while (semantic != NULL)
{
print_icache_declaration (file,
semantic->insn,
semantic->expanded_bits,
semantic->opcodes,
semantic->nr_prefetched_words);
semantic = semantic->next;
}
}
else
{
lf_print__this_file_is_empty (file, "generating jump engine");
}
}
static void
gen_icache_c (lf *file,
insn_list *semantic,
function_entry * functions, cache_entry *cache_rules)
{
/* output `internal' invalid/floating-point unavailable functions
where needed */
if (options.gen.code == generate_calls && options.gen.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");
function_entry_traverse (file, functions,
print_icache_internal_function_definition,
NULL);
lf_printf (file, "\n");
while (semantic != NULL)
{
print_icache_definition (file,
semantic->insn,
semantic->expanded_bits,
semantic->opcodes,
cache_rules,
semantic->nr_prefetched_words);
semantic = semantic->next;
}
}
else
{
lf_print__this_file_is_empty (file, "generating jump engine");
}
}
/****************************************************************/
static void
gen_idecode_h (lf *file,
gen_table *gen, insn_table *insns, cache_entry *cache_rules)
{
lf_printf (file, "typedef unsigned%d %sinstruction_word;\n",
options.insn_bit_size, options.module.global.prefix.l);
if (options.gen.delayed_branch)
{
lf_printf (file, "typedef struct _%sinstruction_address {\n",
options.module.global.prefix.l);
lf_printf (file, " address_word ip; /* instruction pointer */\n");
lf_printf (file, " address_word dp; /* delayed-slot pointer */\n");
lf_printf (file, "} %sinstruction_address;\n",
options.module.global.prefix.l);
}
else
{
lf_printf (file, "typedef address_word %sinstruction_address;\n",
options.module.global.prefix.l);
}
if (options.gen.nia == nia_is_invalid
&& strlen (options.module.global.prefix.u) > 0)
{
lf_indent_suppress (file);
lf_printf (file, "#define %sINVALID_INSTRUCTION_ADDRESS ",
options.module.global.prefix.u);
lf_printf (file, "INVALID_INSTRUCTION_ADDRESS\n");
}
lf_printf (file, "\n");
print_icache_struct (file, insns, cache_rules);
lf_printf (file, "\n");
if (options.gen.icache)
{
ERROR ("FIXME - idecode with icache suffering from bit-rot");
}
else
{
gen_list *entry;
for (entry = gen->tables; entry != NULL; entry = entry->next)
{
print_idecode_issue_function_header (file,
(options.gen.multi_sim
? entry->model->name
: NULL),
is_function_declaration,
1 /*ALWAYS ONE WORD */ );
}
if (options.gen.multi_sim)
{
print_idecode_issue_function_header (file,
NULL,
is_function_variable,
1 /*ALWAYS ONE WORD */ );
}
}
}
static void
gen_idecode_c (lf *file,
gen_table *gen, insn_table *isa, cache_entry *cache_rules)
{
/* the intro */
print_includes (file);
print_include_inline (file, options.module.semantics);
lf_printf (file, "\n");
print_idecode_globals (file);
lf_printf (file, "\n");
switch (options.gen.code)
{
case generate_calls:
{
gen_list *entry;
for (entry = gen->tables; entry != NULL; entry = entry->next)
{
print_idecode_lookups (file, entry->table, cache_rules);
/* output the main idecode routine */
if (!options.gen.icache)
{
print_idecode_issue_function_header (file,
(options.gen.multi_sim
? entry->model->name
: NULL),
1 /*is definition */ ,
1 /*ALWAYS ONE WORD */ );
lf_printf (file, "{\n");
lf_indent (file, +2);
lf_printf (file, "%sinstruction_address nia;\n",
options.module.global.prefix.l);
print_idecode_body (file, entry->table, "nia =");
lf_printf (file, "return nia;");
lf_indent (file, -2);
lf_printf (file, "}\n");
}
}
break;
}
case generate_jumps:
{
lf_print__this_file_is_empty (file, "generating a jump engine");
break;
}
}
}
/****************************************************************/
static void
gen_run_c (lf *file, gen_table *gen)
{
gen_list *entry;
lf_printf (file, "#include \"sim-main.h\"\n");
lf_printf (file, "#include \"engine.h\"\n");
lf_printf (file, "#include \"idecode.h\"\n");
lf_printf (file, "#include \"bfd.h\"\n");
lf_printf (file, "\n");
if (options.gen.multi_sim)
{
print_idecode_issue_function_header (file, NULL, is_function_variable,
1);
lf_printf (file, "\n");
print_engine_run_function_header (file, NULL, is_function_variable);
lf_printf (file, "\n");
}
lf_printf (file, "void\n");
lf_printf (file, "sim_engine_run (SIM_DESC sd,\n");
lf_printf (file, " int next_cpu_nr,\n");
lf_printf (file, " int nr_cpus,\n");
lf_printf (file, " int siggnal)\n");
lf_printf (file, "{\n");
lf_indent (file, +2);
if (options.gen.multi_sim)
{
lf_printf (file, "int mach;\n");
lf_printf (file, "if (STATE_ARCHITECTURE (sd) == NULL)\n");
lf_printf (file, " mach = 0;\n");
lf_printf (file, "else\n");
lf_printf (file, " mach = STATE_ARCHITECTURE (sd)->mach;\n");
lf_printf (file, "switch (mach)\n");
lf_printf (file, " {\n");
lf_indent (file, +2);
for (entry = gen->tables; entry != NULL; entry = entry->next)
{
if (options.gen.default_model != NULL
&& (strcmp (entry->model->name, options.gen.default_model) == 0
|| strcmp (entry->model->full_name,
options.gen.default_model) == 0))
lf_printf (file, "default:\n");
lf_printf (file, "case bfd_mach_%s:\n", entry->model->full_name);
lf_indent (file, +2);
print_function_name (file, "issue", NULL, /* format name */
NULL, /* NO processor */
NULL, /* expanded bits */
function_name_prefix_idecode);
lf_printf (file, " = ");
print_function_name (file, "issue", NULL, /* format name */
entry->model->name, NULL, /* expanded bits */
function_name_prefix_idecode);
lf_printf (file, ";\n");
print_function_name (file, "run", NULL, /* format name */
NULL, /* NO processor */
NULL, /* expanded bits */
function_name_prefix_engine);
lf_printf (file, " = ");
print_function_name (file, "run", NULL, /* format name */
entry->model->name, NULL, /* expanded bits */
function_name_prefix_engine);
lf_printf (file, ";\n");
lf_printf (file, "break;\n");
lf_indent (file, -2);
}
if (options.gen.default_model == NULL)
{
lf_printf (file, "default:\n");
lf_indent (file, +2);
lf_printf (file, "sim_engine_abort (sd, NULL, NULL_CIA,\n");
lf_printf (file,
" \"sim_engine_run - unknown machine\");\n");
lf_printf (file, "break;\n");
lf_indent (file, -2);
}
lf_indent (file, -2);
lf_printf (file, " }\n");
}
print_function_name (file, "run", NULL, /* format name */
NULL, /* NO processor */
NULL, /* expanded bits */
function_name_prefix_engine);
lf_printf (file, " (sd, next_cpu_nr, nr_cpus, siggnal);\n");
lf_indent (file, -2);
lf_printf (file, "}\n");
}
/****************************************************************/
static gen_table *
do_gen (insn_table *isa, decode_table *decode_rules)
{
gen_table *gen;
if (decode_rules == NULL)
error (NULL, "Must specify a decode table\n");
if (isa == NULL)
error (NULL, "Must specify an instruction table\n");
if (decode_table_max_word_nr (decode_rules) > 0)
options.gen.multi_word = decode_table_max_word_nr (decode_rules);
gen = make_gen_tables (isa, decode_rules);
gen_tables_expand_insns (gen);
gen_tables_expand_semantics (gen);
return gen;
}
/****************************************************************/
igen_options options;
int
main (int argc, char **argv, char **envp)
{
cache_entry *cache_rules = NULL;
lf_file_references file_references = lf_include_references;
decode_table *decode_rules = NULL;
insn_table *isa = NULL;
gen_table *gen = NULL;
char *real_file_name = NULL;
int is_header = 0;
int ch;
lf *standard_out =
lf_open ("-", "stdout", lf_omit_references, lf_is_text, "igen");
INIT_OPTIONS ();
if (argc == 1)
{
printf ("Usage:\n");
printf ("\n");
printf (" igen <config-opts> ... <input-opts>... <output-opts>...\n");
printf ("\n");
printf ("Config options:\n");
printf ("\n");
printf (" -B <bit-size>\n");
printf ("\t Set the number of bits in an instruction (deprecated).\n");
printf
("\t This option can now be set directly in the instruction table.\n");
printf ("\n");
printf (" -D <data-structure>\n");
printf
("\t Dump the specified data structure to stdout. Valid structures include:\n");
printf
("\t processor-names - list the names of all the processors (models)\n");
printf ("\n");
printf (" -F <filter-list>\n");
printf
("\t Filter out any instructions with a non-empty flags field that contains\n");
printf ("\t a flag not listed in the <filter-list>.\n");
printf ("\n");
printf (" -H <high-bit>\n");
printf
("\t Set the number of the high (most significant) instruction bit (deprecated).\n");
printf
("\t This option can now be set directly in the instruction table.\n");
printf ("\n");
printf (" -I <directory>\n");
printf
("\t Add <directory> to the list of directories searched when opening a file\n");
printf ("\n");
printf (" -M <model-list>\n");
printf
("\t Filter out any instructions that do not support at least one of the listed\n");
printf
("\t models (An instructions with no model information is considered to support\n");
printf ("\t all models.).\n");
printf ("\n");
printf (" -N <nr-cpus>\n");
printf ("\t Generate a simulator supporting <nr-cpus>\n");
printf
("\t Specify `-N 0' to disable generation of the SMP. Specifying `-N 1' will\n");
printf
("\t still generate an SMP enabled simulator but will only support one CPU.\n");
printf ("\n");
printf (" -T <mechanism>\n");
printf
("\t Override the decode mechanism specified by the decode rules\n");
printf ("\n");
printf (" -P <prefix>\n");
printf
("\t Prepend global names (except itable) with the string <prefix>.\n");
printf
("\t Specify -P <module>=<prefix> to set a specific <module>'s prefix.\n");
printf ("\n");
printf (" -S <suffix>\n");
printf
("\t Replace a global name (suffix) (except itable) with the string <suffix>.\n");
printf
("\t Specify -S <module>=<suffix> to change a specific <module>'s name (suffix).\n");
printf ("\n");
printf (" -Werror\n");
printf ("\t Make warnings errors\n");
printf (" -Wnodiscard\n");
printf
("\t Suppress warnings about discarded functions and instructions\n");
printf (" -Wnowidth\n");
printf
("\t Suppress warnings about instructions with invalid widths\n");
printf (" -Wnounimplemented\n");
printf ("\t Suppress warnings about unimplemented instructions\n");
printf ("\n");
printf (" -G [!]<gen-option>\n");
printf ("\t Any of the following options:\n");
printf ("\n");
printf
("\t decode-duplicate - Override the decode rules, forcing the duplication of\n");
printf ("\t semantic functions\n");
printf
("\t decode-combine - Combine any duplicated entries within a table\n");
printf
("\t decode-zero-reserved - Override the decode rules, forcing reserved bits to be\n");
printf ("\t treated as zero.\n");
printf
("\t decode-switch-is-goto - Overfide the padded-switch code type as a goto-switch\n");
printf ("\n");
printf
("\t gen-conditional-issue - conditionally issue each instruction\n");
printf
("\t gen-delayed-branch - need both cia and nia passed around\n");
printf
("\t gen-direct-access - use #defines to directly access values\n");
printf
("\t gen-zero-r<N> - arch assumes GPR(<N>) == 0, keep it that way\n");
printf
("\t gen-icache[=<N> - generate an instruction cracking cache of size <N>\n");
printf ("\t Default size is %d\n",
options.gen.icache_size);
printf
("\t gen-insn-in-icache - save original instruction when cracking\n");
printf
("\t gen-multi-sim[=MODEL] - generate multiple simulators - one per model\n");
printf
("\t If specified MODEL is made the default architecture.\n");
printf
("\t By default, a single simulator that will\n");
printf
("\t execute any instruction is generated\n");
printf
("\t gen-multi-word - generate code allowing for multi-word insns\n");
printf
("\t gen-semantic-icache - include semantic code in cracking functions\n");
printf
("\t gen-slot-verification - perform slot verification as part of decode\n");
printf ("\t gen-nia-invalid - NIA defaults to nia_invalid\n");
printf ("\t gen-nia-void - do not compute/return NIA\n");
printf ("\n");
printf
("\t trace-combine - report combined entries a rule application\n");
printf
("\t trace-entries - report entries after a rules application\n");
printf ("\t trace-rule-rejection - report each rule as rejected\n");
printf ("\t trace-rule-selection - report each rule as selected\n");
printf
("\t trace-insn-insertion - report each instruction as it is inserted into a decode table\n");
printf
("\t trace-rule-expansion - report each instruction as it is expanded (before insertion into a decode table)\n");
printf ("\t trace-all - enable all trace options\n");
printf ("\n");
printf
("\t field-widths - instruction formats specify widths (deprecated)\n");
printf
("\t By default, an instruction format specifies bit\n");
printf ("\t positions\n");
printf
("\t This option can now be set directly in the\n");
printf ("\t instruction table\n");
printf
("\t jumps - use jumps instead of function calls\n");
printf
("\t omit-line-numbers - do not include line number information in the output\n");
printf ("\n");
printf ("Input options:\n");
printf ("\n");
printf (" -k <cache-rules> (deprecated)\n");
printf (" -o <decode-rules>\n");
printf (" -i <instruction-table>\n");
printf ("\n");
printf ("Output options:\n");
printf ("\n");
printf (" -x Perform expansion (required)\n");
printf
(" -n <real-name> Specify the real name of the next output file\n");
printf
(" -h Generate the header (.h) file rather than the body (.c)\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 (" -r <output-file> output multi-sim run\n");
printf (" -s <output-file> output schematic\n");
printf (" -t <output-file> output itable\n");
}
while ((ch = getopt (argc, argv,
"B:D:F:G:H:I:M:N:P:T:W:o:k:i:n:hc:d:e:m:r:s:t:f:x"))
!= -1)
{
fprintf (stderr, " -%c ", ch);
if (optarg)
fprintf (stderr, "%s ", optarg);
fprintf (stderr, "\\\n");
switch (ch)
{
case 'M':
filter_parse (&options.model_filter, optarg);
break;
case 'D':
if (strcmp (optarg, "processor-names"))
{
char *processor;
for (processor = filter_next (options.model_filter, "");
processor != NULL;
processor = filter_next (options.model_filter, processor))
lf_printf (standard_out, "%s\n", processor);
}
else
error (NULL, "Unknown data structure %s, not dumped\n", optarg);
break;
case 'F':
filter_parse (&options.flags_filter, optarg);
break;
case 'I':
{
table_include **dir = &options.include;
while ((*dir) != NULL)
dir = &(*dir)->next;
(*dir) = ZALLOC (table_include);
(*dir)->dir = strdup (optarg);
}
break;
case 'B':
options.insn_bit_size = a2i (optarg);
if (options.insn_bit_size <= 0
|| options.insn_bit_size > max_insn_bit_size)
{
error (NULL, "Instruction bitsize must be in range 1..%d\n",
max_insn_bit_size);
}
if (options.hi_bit_nr != options.insn_bit_size - 1
&& options.hi_bit_nr != 0)
{
error (NULL, "Conflict betweem hi-bit-nr and insn-bit-size\n");
}
break;
case 'H':
options.hi_bit_nr = a2i (optarg);
if (options.hi_bit_nr != options.insn_bit_size - 1
&& options.hi_bit_nr != 0)
{
error (NULL, "Conflict between hi-bit-nr and insn-bit-size\n");
}
break;
case 'N':
options.gen.smp = a2i (optarg);
break;
case 'P':
case 'S':
{
igen_module *names;
igen_name *name;
char *chp;
chp = strchr (optarg, '=');
if (chp == NULL)
{
names = &options.module.global;
chp = optarg;
}
else
{
chp = chp + 1; /* skip `=' */
names = NULL;
if (strncmp (optarg, "global=", chp - optarg) == 0)
{
names = &options.module.global;
}
if (strncmp (optarg, "engine=", chp - optarg) == 0)
{
names = &options.module.engine;
}
if (strncmp (optarg, "icache=", chp - optarg) == 0)
{
names = &options.module.icache;
}
if (strncmp (optarg, "idecode=", chp - optarg) == 0)
{
names = &options.module.idecode;
}
if (strncmp (optarg, "itable=", chp - optarg) == 0)
{
names = &options.module.itable;
}
if (strncmp (optarg, "semantics=", chp - optarg) == 0)
{
names = &options.module.semantics;
}
if (strncmp (optarg, "support=", chp - optarg) == 0)
{
names = &options.module.support;
}
if (names == NULL)
{
error (NULL, "Prefix `%s' unreconized\n", optarg);
}
}
switch (ch)
{
case 'P':
name = &names->prefix;
break;
case 'S':
name = &names->suffix;
break;
default:
abort (); /* Bad switch. */
}
name->u = strdup (chp);
name->l = strdup (chp);
chp = name->u;
while (*chp)
{
if (islower (*chp))
*chp = toupper (*chp);
chp++;
}
if (name == &options.module.global.prefix)
{
options.module.engine.prefix = options.module.global.prefix;
options.module.icache.prefix = options.module.global.prefix;
options.module.idecode.prefix = options.module.global.prefix;
/* options.module.itable.prefix = options.module.global.prefix; */
options.module.semantics.prefix =
options.module.global.prefix;
options.module.support.prefix = options.module.global.prefix;
}
if (name == &options.module.global.suffix)
{
options.module.engine.suffix = options.module.global.suffix;
options.module.icache.suffix = options.module.global.suffix;
options.module.idecode.suffix = options.module.global.suffix;
/* options.module.itable.suffix = options.module.global.suffix; */
options.module.semantics.suffix =
options.module.global.suffix;
options.module.support.suffix = options.module.global.suffix;
}
break;
}
case 'W':
{
if (strcmp (optarg, "error") == 0)
options.warning = error;
else if (strcmp (optarg, "nodiscard") == 0)
options.warn.discard = 0;
else if (strcmp (optarg, "discard") == 0)
options.warn.discard = 1;
else if (strcmp (optarg, "nowidth") == 0)
options.warn.width = 0;
else if (strcmp (optarg, "width") == 0)
options.warn.width = 1;
else if (strcmp (optarg, "nounimplemented") == 0)
options.warn.unimplemented = 0;
else if (strcmp (optarg, "unimplemented") == 0)
options.warn.unimplemented = 1;
else
error (NULL, "Unknown -W argument `%s'\n", optarg);
break;
}
case 'G':
{
int enable_p;
char *argp;
if (strncmp (optarg, "no-", strlen ("no-")) == 0)
{
argp = optarg + strlen ("no-");
enable_p = 0;
}
else if (strncmp (optarg, "!", strlen ("!")) == 0)
{
argp = optarg + strlen ("no-");
enable_p = 0;
}
else
{
argp = optarg;
enable_p = 1;
}
if (strcmp (argp, "decode-duplicate") == 0)
{
options.decode.duplicate = enable_p;
}
else if (strcmp (argp, "decode-combine") == 0)
{
options.decode.combine = enable_p;
}
else if (strcmp (argp, "decode-zero-reserved") == 0)
{
options.decode.zero_reserved = enable_p;
}
else if (strcmp (argp, "gen-conditional-issue") == 0)
{
options.gen.conditional_issue = enable_p;
}
else if (strcmp (argp, "conditional-issue") == 0)
{
options.gen.conditional_issue = enable_p;
options.warning (NULL,
"Option conditional-issue replaced by gen-conditional-issue\n");
}
else if (strcmp (argp, "gen-delayed-branch") == 0)
{
options.gen.delayed_branch = enable_p;
}
else if (strcmp (argp, "delayed-branch") == 0)
{
options.gen.delayed_branch = enable_p;
options.warning (NULL,
"Option delayed-branch replaced by gen-delayed-branch\n");
}
else if (strcmp (argp, "gen-direct-access") == 0)
{
options.gen.direct_access = enable_p;
}
else if (strcmp (argp, "direct-access") == 0)
{
options.gen.direct_access = enable_p;
options.warning (NULL,
"Option direct-access replaced by gen-direct-access\n");
}
else if (strncmp (argp, "gen-zero-r", strlen ("gen-zero-r")) == 0)
{
options.gen.zero_reg = enable_p;
options.gen.zero_reg_nr = atoi (argp + strlen ("gen-zero-r"));
}
else if (strncmp (argp, "zero-r", strlen ("zero-r")) == 0)
{
options.gen.zero_reg = enable_p;
options.gen.zero_reg_nr = atoi (argp + strlen ("zero-r"));
options.warning (NULL,
"Option zero-r<N> replaced by gen-zero-r<N>\n");
}
else if (strncmp (argp, "gen-icache", strlen ("gen-icache")) == 0)
{
switch (argp[strlen ("gen-icache")])
{
case '=':
options.gen.icache_size =
atoi (argp + strlen ("gen-icache") + 1);
options.gen.icache = enable_p;
break;
case '\0':
options.gen.icache = enable_p;
break;
default:
error (NULL,
"Expecting -Ggen-icache or -Ggen-icache=<N>\n");
}
}
else if (strcmp (argp, "gen-insn-in-icache") == 0)
{
options.gen.insn_in_icache = enable_p;
}
else if (strncmp (argp, "gen-multi-sim", strlen ("gen-multi-sim"))
== 0)
{
char *arg = &argp[strlen ("gen-multi-sim")];
switch (arg[0])
{
case '=':
options.gen.multi_sim = enable_p;
options.gen.default_model = arg + 1;
if (!filter_is_member
(options.model_filter, options.gen.default_model))
error (NULL, "multi-sim model %s unknown\n",
options.gen.default_model);
break;
case '\0':
options.gen.multi_sim = enable_p;
options.gen.default_model = NULL;
break;
default:
error (NULL,
"Expecting -Ggen-multi-sim or -Ggen-multi-sim=<MODEL>\n");
break;
}
}
else if (strcmp (argp, "gen-multi-word") == 0)
{
options.gen.multi_word = enable_p;
}
else if (strcmp (argp, "gen-semantic-icache") == 0)
{
options.gen.semantic_icache = enable_p;
}
else if (strcmp (argp, "gen-slot-verification") == 0)
{
options.gen.slot_verification = enable_p;
}
else if (strcmp (argp, "verify-slot") == 0)
{
options.gen.slot_verification = enable_p;
options.warning (NULL,
"Option verify-slot replaced by gen-slot-verification\n");
}
else if (strcmp (argp, "gen-nia-invalid") == 0)
{
options.gen.nia = nia_is_invalid;
}
else if (strcmp (argp, "default-nia-minus-one") == 0)
{
options.gen.nia = nia_is_invalid;
options.warning (NULL,
"Option default-nia-minus-one replaced by gen-nia-invalid\n");
}
else if (strcmp (argp, "gen-nia-void") == 0)
{
options.gen.nia = nia_is_void;
}
else if (strcmp (argp, "trace-all") == 0)
{
memset (&options.trace, enable_p, sizeof (options.trace));
}
else if (strcmp (argp, "trace-combine") == 0)
{
options.trace.combine = enable_p;
}
else if (strcmp (argp, "trace-entries") == 0)
{
options.trace.entries = enable_p;
}
else if (strcmp (argp, "trace-rule-rejection") == 0)
{
options.trace.rule_rejection = enable_p;
}
else if (strcmp (argp, "trace-rule-selection") == 0)
{
options.trace.rule_selection = enable_p;
}
else if (strcmp (argp, "trace-insn-insertion") == 0)
{
options.trace.insn_insertion = enable_p;
}
else if (strcmp (argp, "trace-insn-expansion") == 0)
{
options.trace.insn_expansion = enable_p;
}
else if (strcmp (argp, "jumps") == 0)
{
options.gen.code = generate_jumps;
}
else if (strcmp (argp, "field-widths") == 0)
{
options.insn_specifying_widths = enable_p;
}
else if (strcmp (argp, "omit-line-numbers") == 0)
{
file_references = lf_omit_references;
}
else
{
error (NULL, "Unknown option %s\n", optarg);
}
break;
}
case 'i':
isa = load_insn_table (optarg, cache_rules);
if (isa->illegal_insn == NULL)
error (NULL, "illegal-instruction missing from insn table\n");
break;
case 'x':
gen = do_gen (isa, decode_rules);
break;
case 'o':
decode_rules = load_decode_table (optarg);
break;
case 'k':
if (isa != NULL)
error (NULL, "Cache file must appear before the insn file\n");
cache_rules = load_cache_table (optarg);
break;
case 'n':
real_file_name = strdup (optarg);
break;
case 'h':
is_header = 1;
break;
case 'c':
case 'd':
case 'e':
case 'f':
case 'm':
case 'r':
case 's':
case 't':
{
lf *file = lf_open (optarg, real_file_name, file_references,
(is_header ? lf_is_h : lf_is_c),
argv[0]);
if (gen == NULL && ch != 't' && ch != 'm' && ch != 'f')
{
options.warning (NULL,
"Explicitly generate tables with -x option\n");
gen = do_gen (isa, decode_rules);
}
lf_print__file_start (file);
switch (ch)
{
case 'm':
if (is_header)
gen_model_h (file, isa);
else
gen_model_c (file, isa);
break;
case 't':
if (is_header)
gen_itable_h (file, isa);
else
gen_itable_c (file, isa);
break;
case 'f':
if (is_header)
gen_support_h (file, isa);
else
gen_support_c (file, isa);
break;
case 'r':
if (is_header)
options.warning (NULL, "-hr option ignored\n");
else
gen_run_c (file, gen);
break;
case 's':
if (is_header)
gen_semantics_h (file, gen->semantics, isa->max_nr_words);
else
gen_semantics_c (file, gen->semantics, isa->caches);
break;
case 'd':
if (is_header)
gen_idecode_h (file, gen, isa, cache_rules);
else
gen_idecode_c (file, gen, isa, cache_rules);
break;
case 'e':
if (is_header)
gen_engine_h (file, gen, isa, cache_rules);
else
gen_engine_c (file, gen, isa, cache_rules);
break;
case 'c':
if (is_header)
gen_icache_h (file,
gen->semantics,
isa->functions, isa->max_nr_words);
else
gen_icache_c (file,
gen->semantics, isa->functions, cache_rules);
break;
}
lf_print__file_finish (file);
lf_close (file);
is_header = 0;
}
real_file_name = NULL;
break;
default:
ERROR ("Bad switch");
}
}
return (0);
}