igen.c

这个是LINUX下的GDB调度工具的源码

/*  This file is part of the program psim.

    Copyright 1994, 1995, 1996, 1997, 2003 Andrew Cagney

    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-cache.h"
#include "ld-decode.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;
int insn_bit_size = max_insn_bit_size;

igen_code code = generate_calls;

int generate_expanded_instructions;
int icache_size = 1024;
int generate_smp;

/****************************************************************/

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, "semantic_");
    break;
  case function_name_prefix_idecode:
    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, "icache_");
    break;
  default:
    break;
  }

  /* the function name */
  {
    const char *pos;
    for (pos = basename;
	 *pos != '\0';
	 pos++) {
      switch (*pos) {
      case '/':
      case '-':
      case '(':
      case ')':
	break;
      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");
}


void
print_itrace(lf *file,
	     table_entry *file_entry,
	     int idecode)
{
  lf_print__external_reference(file, file_entry->line_nr, file_entry->file_name);
  lf_printf(file, "ITRACE(trace_%s, (\"%s %s\\n\"));\n",
	    (idecode ? "idecode" : "semantics"),
	    (idecode ? "idecode" : "semantics"),
	    file_entry->fields[insn_name]);
  lf_print__internal_reference(file);
}


/****************************************************************/


static void
gen_semantics_h(insn_table *table,
		lf *file,
		igen_code generate)
{
  lf_printf(file, "typedef %s idecode_semantic\n(%s);\n",
	    SEMANTIC_FUNCTION_TYPE,
	    SEMANTIC_FUNCTION_FORMAL);
  lf_printf(file, "\n");
  if ((code & generate_calls)) {
    lf_printf(file, "extern int option_mpc860c0;\n");
    lf_printf(file, "#define PAGE_SIZE 0x1000\n");
    lf_printf(file, "\n");
    lf_printf(file, "PSIM_EXTERN_SEMANTICS(void)\n");
    lf_printf(file, "semantic_init(device* root);\n");
    lf_printf(file, "\n");
    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 \"cpu.h\"\n");
    lf_printf(file, "#include \"idecode.h\"\n");
    lf_printf(file, "#include \"semantics.h\"\n");
    lf_printf(file, "#ifdef HAVE_COMMON_FPU\n");
    lf_printf(file, "#include \"sim-inline.h\"\n");
    lf_printf(file, "#include \"sim-fpu.h\"\n");
    lf_printf(file, "#endif\n");
    lf_printf(file, "#include \"support.h\"\n");
    lf_printf(file, "\n");
    lf_printf(file, "int option_mpc860c0 = 0;\n");
    lf_printf(file, "\n");
    lf_printf(file, "PSIM_EXTERN_SEMANTICS(void)\n");
    lf_printf(file, "semantic_init(device* root)\n");
    lf_printf(file, "{\n");
    lf_printf(file, "  option_mpc860c0 = 0;\n");
    lf_printf(file, "  if (tree_find_property(root, \"/options/mpc860c0\"))\n");
    lf_printf(file, "    option_mpc860c0 = tree_find_integer_property(root, \"/options/mpc860c0\");\n");
    lf_printf(file, "    option_mpc860c0 *= 4;   /* convert word count to byte count */\n");
    lf_printf(file, "}\n");
    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 %s idecode_icache\n(%s);\n",
	    ICACHE_FUNCTION_TYPE,
	    ICACHE_FUNCTION_FORMAL);
  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 */