Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 1621 insertions, 0 deletions

diff --git a/sim/igen/igen.c b/sim/igen/igen.c
new file mode 100644
index 0000000..094f0cd
--- /dev/null
+++ b/sim/igen/igen.c
@@ -0,0 +1,1621 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1998, 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 "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, "%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 (depreciated).\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 (depreciated).\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 (depreciated)\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> (depreciated)\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;
+	      }
+	    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);
+}