/* The IGEN simulator generator for GDB, the GNU Debugger.

   Copyright 2002 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 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-insn.h"

#include "gen-model.h"

#ifndef NULL
#define NULL 0
#endif


#if 0
static void
model_c_or_h_data (insn_table *table, lf *file, table_entry *data)
{
  if (data->annex)
    {
      table_entry_print_cpp_line_nr (file, data->annex_line);
      lf_print__c_code (file, data->annex);
      lf_print__internal_reference (file);
      lf_printf (file, "\n");
    }
}

static void
model_c_or_h_function (insn_table *entry,
		       lf *file, table_entry *function, char *prefix)
{
  if (function->fields[function_type] == NULL
      || function->fields[function_type][0] == '\0')
    {
      error ("Model function type not specified for %s",
	     function->fields[function_name]);
    }
  lf_printf (file, "\n");
  lf_print_function_type (file, function->fields[function_type], prefix, " ");
  lf_printf (file, "%s\n(%s);\n",
	     function->fields[function_name],
	     function->fields[function_param]);
  lf_printf (file, "\n");
}

void
gen_model_h (insn_table *table, lf *file)
{
  insn *insn_ptr;
  model *model_ptr;
  insn *macro;
  char *name;
  int model_create_p = 0;
  int model_init_p = 0;
  int model_halt_p = 0;
  int model_mon_info_p = 0;
  int model_mon_info_free_p = 0;

  for (macro = model_macros; macro; macro = macro->next)
    {
      model_c_or_h_data (table, file, macro->file_entry);
    }

  lf_printf (file, "typedef enum _model_enum {\n");
  lf_printf (file, "  MODEL_NONE,\n");
  for (model_ptr = models; model_ptr; model_ptr = model_ptr->next)
    {
      lf_printf (file, "  MODEL_%s,\n", model_ptr->name);
    }
  lf_printf (file, "  nr_models\n");
  lf_printf (file, "} model_enum;\n");
  lf_printf (file, "\n");

  lf_printf (file, "#define DEFAULT_MODEL MODEL_%s\n",
	     (models) ? models->name : "NONE");
  lf_printf (file, "\n");

  lf_printf (file, "typedef struct _model_data model_data;\n");
  lf_printf (file, "typedef struct _model_time model_time;\n");
  lf_printf (file, "\n");

  lf_printf (file, "extern model_enum current_model;\n");
  lf_printf (file, "extern const char *model_name[ (int)nr_models ];\n");
  lf_printf (file,
	     "extern const char *const *const model_func_unit_name[ (int)nr_models ];\n");
  lf_printf (file,
	     "extern const model_time *const model_time_mapping[ (int)nr_models ];\n");
  lf_printf (file, "\n");

  for (insn_ptr = model_functions; insn_ptr; insn_ptr = insn_ptr->next)
    {
      model_c_or_h_function (table, file, insn_ptr->file_entry,
			     "INLINE_MODEL");
      name = insn_ptr->file_entry->fields[function_name];
      if (strcmp (name, "model_create") == 0)
	model_create_p = 1;
      else if (strcmp (name, "model_init") == 0)
	model_init_p = 1;
      else if (strcmp (name, "model_halt") == 0)
	model_halt_p = 1;
      else if (strcmp (name, "model_mon_info") == 0)
	model_mon_info_p = 1;
      else if (strcmp (name, "model_mon_info_free") == 0)
	model_mon_info_free_p = 1;
    }

  if (!model_create_p)
    {
      lf_print_function_type (file, "model_data *", "INLINE_MODEL", " ");
      lf_printf (file, "model_create\n");
      lf_printf (file, "(sim_cpu *cpu);\n");
      lf_printf (file, "\n");
    }

  if (!model_init_p)
    {
      lf_print_function_type (file, "void", "INLINE_MODEL", " ");
      lf_printf (file, "model_init\n");
      lf_printf (file, "(model_data *model_ptr);\n");
      lf_printf (file, "\n");
    }

  if (!model_halt_p)
    {
      lf_print_function_type (file, "void", "INLINE_MODEL", " ");
      lf_printf (file, "model_halt\n");
      lf_printf (file, "(model_data *model_ptr);\n");
      lf_printf (file, "\n");
    }

  if (!model_mon_info_p)
    {
      lf_print_function_type (file, "model_print *", "INLINE_MODEL", " ");
      lf_printf (file, "model_mon_info\n");
      lf_printf (file, "(model_data *model_ptr);\n");
      lf_printf (file, "\n");
    }

  if (!model_mon_info_free_p)
    {
      lf_print_function_type (file, "void", "INLINE_MODEL", " ");
      lf_printf (file, "model_mon_info_free\n");
      lf_printf (file, "(model_data *model_ptr,\n");
      lf_printf (file, " model_print *info_ptr);\n");
      lf_printf (file, "\n");
    }

  lf_print_function_type (file, "void", "INLINE_MODEL", " ");
  lf_printf (file, "model_set\n");
  lf_printf (file, "(const char *name);\n");
}

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

typedef struct _model_c_passed_data model_c_passed_data;
struct _model_c_passed_data
{
  lf *file;
  model *model_ptr;
};

static void
model_c_insn (insn_table *entry,
	      lf *phony_file, void *data, insn * instruction, int depth)
{
  model_c_passed_data *data_ptr = (model_c_passed_data *) data;
  lf *file = data_ptr->file;
  char *current_name = data_ptr->model_ptr->printable_name;
  table_model_entry *model_ptr = instruction->file_entry->model_first;

  while (model_ptr)
    {
      if (model_ptr->fields[insn_model_name] == current_name)
	{
	  lf_printf (file, "  { %-*s },  /* %s */\n",
		     max_model_fields_len,
		     model_ptr->fields[insn_model_fields],
		     instruction->file_entry->fields[insn_name]);
	  return;
	}

      model_ptr = model_ptr->next;
    }

  lf_printf (file, "  { %-*s },  /* %s */\n",
	     max_model_fields_len,
	     data_ptr->model_ptr->insn_default,
	     instruction->file_entry->fields[insn_name]);
}

static void
model_c_function (insn_table *table,
		  lf *file, table_entry *function, const char *prefix)
{
  if (function->fields[function_type] == NULL
      || function->fields[function_type][0] == '\0')
    {
      error ("Model function return type not specified for %s",
	     function->fields[function_name]);
    }
  else
    {
      lf_printf (file, "\n");
      lf_print_function_type (file, function->fields[function_type], prefix,
			      "\n");
      lf_printf (file, "%s(%s)\n", function->fields[function_name],
		 function->fields[function_param]);
    }
  lf_printf (file, "{\n");
  if (function->annex)
    {
      lf_indent (file, +2);
      table_entry_print_cpp_line_nr (file, function->annex_line);
      lf_print__c_code (file, function->annex);
      lf_indent (file, -2);
    }
  lf_printf (file, "}\n");
  lf_print__internal_reference (file);
  lf_printf (file, "\n");
}

void
gen_model_c (insn_table *table, lf *file)
{
  insn *insn_ptr;
  model *model_ptr;
  char *name;
  int model_create_p = 0;
  int model_init_p = 0;
  int model_halt_p = 0;
  int model_mon_info_p = 0;
  int model_mon_info_free_p = 0;

  lf_printf (file, "\n");
  lf_printf (file, "#include \"cpu.h\"\n");
  lf_printf (file, "#include \"mon.h\"\n");
  lf_printf (file, "\n");
  lf_printf (file, "#ifdef HAVE_STDLIB_H\n");
  lf_printf (file, "#include <stdlib.h>\n");
  lf_printf (file, "#endif\n");
  lf_printf (file, "\n");

  for (insn_ptr = model_data; insn_ptr; insn_ptr = insn_ptr->next)
    {
      model_c_or_h_data (table, file, insn_ptr->file_entry);
    }

  for (insn_ptr = model_static; insn_ptr; insn_ptr = insn_ptr->next)
    {
      model_c_or_h_function (table, file, insn_ptr->file_entry,
			     "/*h*/STATIC");
    }

  for (insn_ptr = model_internal; insn_ptr; insn_ptr = insn_ptr->next)
    {
      model_c_or_h_function (table, file, insn_ptr->file_entry,
			     "STATIC_INLINE_MODEL");
    }

  for (insn_ptr = model_static; insn_ptr; insn_ptr = insn_ptr->next)
    {
      model_c_function (table, file, insn_ptr->file_entry, "/*c*/STATIC");
    }

  for (insn_ptr = model_internal; insn_ptr; insn_ptr = insn_ptr->next)
    {
      model_c_function (table, file, insn_ptr->file_entry,
			"STATIC_INLINE_MODEL");
    }

  for (insn_ptr = model_functions; insn_ptr; insn_ptr = insn_ptr->next)
    {
      model_c_function (table, file, insn_ptr->file_entry, "INLINE_MODEL");
      name = insn_ptr->file_entry->fields[function_name];
      if (strcmp (name, "model_create") == 0)
	model_create_p = 1;
      else if (strcmp (name, "model_init") == 0)
	model_init_p = 1;
      else if (strcmp (name, "model_halt") == 0)
	model_halt_p = 1;
      else if (strcmp (name, "model_mon_info") == 0)
	model_mon_info_p = 1;
      else if (strcmp (name, "model_mon_info_free") == 0)
	model_mon_info_free_p = 1;
    }

  if (!model_create_p)
    {
      lf_print_function_type (file, "model_data *", "INLINE_MODEL", "\n");
      lf_printf (file, "model_create(sim_cpu *cpu)\n");
      lf_printf (file, "{\n");
      lf_printf (file, "  return (model_data *)0;\n");
      lf_printf (file, "}\n");
      lf_printf (file, "\n");
    }

  if (!model_init_p)
    {
      lf_print_function_type (file, "void", "INLINE_MODEL", "\n");
      lf_printf (file, "model_init(model_data *model_ptr)\n");
      lf_printf (file, "{\n");
      lf_printf (file, "}\n");
      lf_printf (file, "\n");
    }

  if (!model_halt_p)
    {
      lf_print_function_type (file, "void", "INLINE_MODEL", "\n");
      lf_printf (file, "model_halt(model_data *model_ptr)\n");
      lf_printf (file, "{\n");
      lf_printf (file, "}\n");
      lf_printf (file, "\n");
    }

  if (!model_mon_info_p)
    {
      lf_print_function_type (file, "model_print *", "INLINE_MODEL", "\n");
      lf_printf (file, "model_mon_info(model_data *model_ptr)\n");
      lf_printf (file, "{\n");
      lf_printf (file, "  return (model_print *)0;\n");
      lf_printf (file, "}\n");
      lf_printf (file, "\n");
    }

  if (!model_mon_info_free_p)
    {
      lf_print_function_type (file, "void", "INLINE_MODEL", "\n");
      lf_printf (file, "model_mon_info_free(model_data *model_ptr,\n");
      lf_printf (file, "                    model_print *info_ptr)\n");
      lf_printf (file, "{\n");
      lf_printf (file, "}\n");
      lf_printf (file, "\n");
    }

  lf_printf (file, "/* Insn functional unit info */\n");
  for (model_ptr = models; model_ptr; model_ptr = model_ptr->next)
    {
      model_c_passed_data data;

      lf_printf (file, "static const model_time model_time_%s[] = {\n",
		 model_ptr->name);
      data.file = file;
      data.model_ptr = model_ptr;
      insn_table_traverse_insn (table, NULL, (void *) &data, model_c_insn);

      lf_printf (file, "};\n");
      lf_printf (file, "\n");
      lf_printf (file, "\f\n");
    }

  lf_printf (file, "#ifndef _INLINE_C_\n");
  lf_printf (file,
	     "const model_time *const model_time_mapping[ (int)nr_models ] = {\n");
  lf_printf (file, "  (const model_time *const)0,\n");
  for (model_ptr = models; model_ptr; model_ptr = model_ptr->next)
    {
      lf_printf (file, "  model_time_%s,\n", model_ptr->name);
    }
  lf_printf (file, "};\n");
  lf_printf (file, "#endif\n");
  lf_printf (file, "\n");

  lf_printf (file, "\f\n");
  lf_printf (file, "/* map model enumeration into printable string */\n");
  lf_printf (file, "#ifndef _INLINE_C_\n");
  lf_printf (file, "const char *model_name[ (int)nr_models ] = {\n");
  lf_printf (file, "  \"NONE\",\n");
  for (model_ptr = models; model_ptr; model_ptr = model_ptr->next)
    {
      lf_printf (file, "  \"%s\",\n", model_ptr->printable_name);
    }
  lf_printf (file, "};\n");
  lf_printf (file, "#endif\n");
  lf_printf (file, "\n");

  lf_print_function_type (file, "void", "INLINE_MODEL", "\n");
  lf_printf (file, "model_set(const char *name)\n");
  lf_printf (file, "{\n");
  if (models)
    {
      lf_printf (file, "  model_enum model;\n");
      lf_printf (file,
		 "  for(model = MODEL_%s; model < nr_models; model++) {\n",
		 models->name);
      lf_printf (file, "    if(strcmp(name, model_name[model]) == 0) {\n");
      lf_printf (file, "      current_model = model;\n");
      lf_printf (file, "      return;\n");
      lf_printf (file, "    }\n");
      lf_printf (file, "  }\n");
      lf_printf (file, "\n");
      lf_printf (file,
		 "  error(\"Unknown model '%%s', Models which are known are:%%s\n\",\n");
      lf_printf (file, "        name,\n");
      lf_printf (file, "        \"");
      for (model_ptr = models; model_ptr; model_ptr = model_ptr->next)
	{
	  lf_printf (file, "\\n\\t%s", model_ptr->printable_name);
	}
      lf_printf (file, "\");\n");
    }
  else
    {
      lf_printf (file, "  error(\"No models are currently known about\");\n");
    }

  lf_printf (file, "}\n");
}

#endif


void
gen_model_h (lf *file, insn_table *table)
{
  lf_print__this_file_is_empty (file, "suffering bit rot");
}


void
gen_model_c (lf *file, insn_table *table)
{
  lf_print__this_file_is_empty (file, "suffering bit rot");
}