Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 859 insertions, 0 deletions

diff --git a/sim/igen/gen-icache.c b/sim/igen/gen-icache.c
new file mode 100644
index 0000000..88d5d41
--- /dev/null
+++ b/sim/igen/gen-icache.c
@@ -0,0 +1,859 @@
+/*  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 "misc.h"
+#include "lf.h"
+#include "table.h"
+#include "filter.h"
+#include "igen.h"
+
+#include "ld-insn.h"
+#include "ld-decode.h"
+
+#include "gen.h"
+
+#include "gen-semantics.h"
+#include "gen-idecode.h"
+#include "gen-icache.h"
+
+
+
+static void
+print_icache_function_header (lf *file,
+			      const char *basename,
+			      const char *format_name,
+			      opcode_bits *expanded_bits,
+			      int is_function_definition,
+			      int nr_prefetched_words)
+{
+  lf_printf(file, "\n");
+  lf_print__function_type_function (file, print_icache_function_type,
+				    "EXTERN_ICACHE", " ");
+  print_function_name (file,
+		       basename, format_name, NULL,
+		       expanded_bits,
+		       function_name_prefix_icache);
+  lf_printf (file, "\n(");
+  print_icache_function_formal (file, nr_prefetched_words);
+  lf_printf (file, ")");
+  if (!is_function_definition)
+    lf_printf (file, ";");
+  lf_printf (file, "\n");
+}
+
+
+void
+print_icache_declaration (lf *file,
+			  insn_entry *insn,
+			  opcode_bits *expanded_bits,
+			  insn_opcodes *opcodes,
+			  int nr_prefetched_words)
+{
+  print_icache_function_header (file,
+				insn->name,
+				insn->format_name,
+				expanded_bits,
+				0/* is not function definition */,
+				nr_prefetched_words);
+}
+
+
+
+static void
+print_icache_extraction (lf *file,
+			 const char *format_name,
+			 cache_entry_type cache_type,
+			 const char *entry_name,
+			 const char *entry_type,
+			 const char *entry_expression,
+			 char *single_insn_field,
+			 line_ref *line,
+			 insn_field_entry *cur_field,
+			 opcode_bits *expanded_bits,
+			 icache_decl_type what_to_declare,
+			 icache_body_type what_to_do)
+{
+  const char *expression;
+  opcode_bits *bits;
+  char *reason;
+  ASSERT (format_name != NULL);
+  ASSERT (entry_name != NULL);
+  
+  /* figure out exactly what should be going on here */
+  switch (cache_type)
+    {
+    case scratch_value:
+      if ((what_to_do & put_values_in_icache)
+	  || what_to_do == do_not_use_icache)
+	{
+	  reason = "scratch";
+	  what_to_do = do_not_use_icache;
+	}
+      else
+	return;
+      break;
+    case compute_value:
+      if ((what_to_do & get_values_from_icache)
+	  || what_to_do == do_not_use_icache)
+	{
+	  reason = "compute";
+	  what_to_do = do_not_use_icache;
+	}
+      else
+	return;
+      break;
+    case cache_value:
+      if ((what_to_declare != undef_variables)
+	  || !(what_to_do & put_values_in_icache))
+	{
+	  reason = "cache";
+	  what_to_declare = ((what_to_do & put_values_in_icache)
+			     ? declare_variables
+			     : what_to_declare);
+	}
+      else
+	return;
+      break;
+    }
+  
+  /* For the type, default to a simple unsigned */
+  if (entry_type == NULL || strlen (entry_type) == 0)
+    entry_type = "unsigned";
+  
+  /* look through the set of expanded sub fields to see if this field
+     has been given a constant value */
+  for (bits = expanded_bits;
+       bits != NULL;
+       bits = bits->next)
+    {
+      if (bits->field == cur_field)
+	break;
+    }
+  
+  /* Define a storage area for the cache element */
+  switch (what_to_declare)
+    {
+    case undef_variables:
+      /* We've finished with the #define value - destory it */
+      lf_indent_suppress (file);
+      lf_printf (file, "#undef %s\n", entry_name);
+      return;
+    case define_variables:
+      /* Using direct access for this entry, clear any prior
+         definition, then define it */
+      lf_indent_suppress (file);
+      lf_printf (file, "#undef %s\n", entry_name);
+      /* Don't type cast pointer types! */
+      lf_indent_suppress (file);
+      if (strchr (entry_type, '*') != NULL)
+	lf_printf (file, "#define %s (", entry_name);
+      else
+	lf_printf (file, "#define %s ((%s) ", entry_name, entry_type);
+      break;
+    case declare_variables:
+      /* using variables to define the value */
+      if (line != NULL)
+	lf_print__line_ref (file, line);
+      lf_printf (file, "%s const %s UNUSED = ", entry_type, entry_name);
+      break;
+    }
+  
+  
+  /* define a value for that storage area as determined by what is in
+     the cache */
+  if (bits != NULL
+      && single_insn_field != NULL
+      && strcmp (entry_name, single_insn_field) == 0
+      && strcmp (entry_name, cur_field->val_string) == 0
+      && ((bits->opcode->is_boolean && bits->value == 0)
+	  || (!bits->opcode->is_boolean)))
+    {
+      /* The cache rule is specifying what to do with a simple
+         instruction field.
+	 
+	 Because of instruction expansion, the field is either a
+	 constant value or equal to the specified constant (boolean
+	 comparison). (The latter indicated by bits->value == 0).
+	 
+         The case of a field not being equal to the specified boolean
+         value is handled later. */
+      expression = "constant field";
+      ASSERT (bits->field == cur_field);
+      if (bits->opcode->is_boolean)
+	{
+	  ASSERT (bits->value == 0);
+	  lf_printf (file, "%d", bits->opcode->boolean_constant);
+	}
+      else if (bits->opcode->last < bits->field->last)
+	{
+	  lf_printf (file, "%d",
+		     bits->value << (bits->field->last - bits->opcode->last));
+	}
+      else
+	{
+	  lf_printf (file, "%d", bits->value);
+	}
+    }
+  else if (bits != NULL
+	   && single_insn_field != NULL
+	   && strncmp (entry_name,
+		       single_insn_field,
+		       strlen (single_insn_field)) == 0
+	   && strncmp (entry_name + strlen (single_insn_field),
+		       "_is_",
+		       strlen ("_is_")) == 0
+	   && ((bits->opcode->is_boolean
+		&& ((unsigned) atol (entry_name + strlen (single_insn_field) + strlen ("_is_"))
+		    == bits->opcode->boolean_constant))
+	       || (!bits->opcode->is_boolean)))
+    {
+      /* The cache rule defines an entry for the comparison between a
+	 single instruction field and a constant.  The value of the
+	 comparison in someway matches that of the opcode field that
+	 was made constant through expansion. */
+      expression = "constant compare";
+      if (bits->opcode->is_boolean)
+	{
+	  lf_printf (file, "%d /* %s == %d */",
+		     bits->value == 0,
+		     single_insn_field,
+		     bits->opcode->boolean_constant);
+	}
+      else if (bits->opcode->last < bits->field->last)
+	{
+	  lf_printf (file, "%d /* %s == %d */",
+		     (atol (entry_name + strlen (single_insn_field) + strlen ("_is_"))
+		      == (bits->value << (bits->field->last - bits->opcode->last))),
+		     single_insn_field,
+		     (bits->value << (bits->field->last - bits->opcode->last)));
+	}
+      else
+	{
+	  lf_printf (file, "%d /* %s == %d */",
+		     (atol (entry_name + strlen (single_insn_field) + strlen ("_is_"))
+		      == bits->value),
+		     single_insn_field,
+		     bits->value);
+	}
+    }
+  else
+    {
+      /* put the field in the local variable, possibly also enter it
+	 into the cache */
+      expression = "extraction";
+      /* handle the cache */
+      if ((what_to_do & get_values_from_icache)
+	  || (what_to_do & put_values_in_icache))
+	{
+	  lf_printf (file, "cache_entry->crack.%s.%s",
+		     format_name,
+		     entry_name);
+	  if (what_to_do & put_values_in_icache) /* also put it in the cache? */
+	    {
+	      lf_printf (file, " = ");
+	    }
+	}
+      if ((what_to_do & put_values_in_icache)
+	  || what_to_do == do_not_use_icache)
+	{
+	  if (cur_field != NULL)
+	    {
+	      if (entry_expression != NULL && strlen (entry_expression) > 0)
+		error (line, "Instruction field entry with nonempty expression\n");
+	      if (cur_field->first == 0 && cur_field->last == options.insn_bit_size - 1)
+		lf_printf (file, "(instruction_%d)",
+			   cur_field->word_nr);
+	      else if (cur_field->last == options.insn_bit_size - 1)
+		lf_printf (file, "MASKED%d (instruction_%d, %d, %d)",
+			   options.insn_bit_size,
+			   cur_field->word_nr,
+			   i2target (options.hi_bit_nr, cur_field->first),
+			   i2target (options.hi_bit_nr, cur_field->last));
+	      else
+		lf_printf (file, "EXTRACTED%d (instruction_%d, %d, %d)",
+			   options.insn_bit_size,
+			   cur_field->word_nr,
+			   i2target (options.hi_bit_nr, cur_field->first),
+			   i2target (options.hi_bit_nr, cur_field->last));
+	    }
+	  else
+	    {
+	      lf_printf (file, "%s", entry_expression);
+	    }
+	}
+    }
+  
+  switch (what_to_declare)
+    {
+    case define_variables:
+      lf_printf (file, ")");
+      break;
+    case undef_variables:
+      break;
+    case declare_variables:
+      lf_printf (file, ";");
+      break;
+    }
+
+  ASSERT (reason != NULL && expression != NULL);
+  lf_printf (file, " /* %s - %s */\n", reason, expression);
+}
+
+
+void
+print_icache_body (lf *file,
+		   insn_entry *instruction,
+		   opcode_bits *expanded_bits,
+		   cache_entry *cache_rules,
+		   icache_decl_type what_to_declare,
+		   icache_body_type what_to_do,
+		   int nr_prefetched_words)
+{
+  /* extract instruction fields */
+  lf_printf (file, "/* Extraction: %s\n", instruction->name);
+  lf_printf (file, "     ");
+  switch (what_to_declare)
+    {
+    case define_variables:
+      lf_printf (file, "#define");
+      break;
+    case declare_variables:
+      lf_printf (file, "declare");
+      break;
+    case undef_variables:
+      lf_printf (file, "#undef");
+      break;
+    }
+  lf_printf (file, " ");
+  switch (what_to_do)
+    {
+    case get_values_from_icache:
+      lf_printf (file, "get-values-from-icache");
+      break;
+    case put_values_in_icache:
+      lf_printf (file, "put-values-in-icache");
+      break;
+    case both_values_and_icache:
+      lf_printf (file, "get-values-from-icache|put-values-in-icache");
+      break;
+    case do_not_use_icache:
+      lf_printf (file, "do-not-use-icache");
+      break;
+    }
+  lf_printf (file, "\n     ");
+  print_insn_words (file, instruction);
+  lf_printf(file, " */\n");
+  
+  /* pass zero - fetch from memory any missing instructions.
+
+     Some of the instructions will have already been fetched (in the
+     instruction array), others will still need fetching. */
+  switch (what_to_do)
+    {
+    case get_values_from_icache:
+      break;
+    case put_values_in_icache:
+    case both_values_and_icache:
+    case do_not_use_icache:
+      {
+	int word_nr;
+	switch (what_to_declare)
+	  {
+	  case undef_variables:
+	    break;
+	  case define_variables:
+	  case declare_variables:
+	    for (word_nr = nr_prefetched_words;
+		 word_nr < instruction->nr_words;
+		 word_nr++)
+	      {
+		/* FIXME - should be using print_icache_extraction? */
+		lf_printf (file, "%sinstruction_word instruction_%d UNUSED = ",
+			   options.module.global.prefix.l,
+			   word_nr);
+		lf_printf (file, "IMEM%d_IMMED (cia, %d)",
+			   options.insn_bit_size, word_nr);
+		lf_printf (file, ";\n");
+	      }
+	  }
+      }
+    }
+
+  /* if putting the instruction words in the cache, define references
+     for them */
+  if (options.gen.insn_in_icache) {
+    /* FIXME: is the instruction_word type correct? */
+    print_icache_extraction (file,
+			     instruction->format_name,
+			     cache_value,
+			     "insn", /* name */
+			     "instruction_word", /* type */
+			     "instruction", /* expression */
+			     NULL, /* origin */
+			     NULL, /* line */
+			     NULL, NULL,
+			     what_to_declare,
+			     what_to_do);
+  }
+  lf_printf(file, "\n");
+
+  /* pass one - process instruction fields.
+
+     If there is no cache rule, the default is to enter the field into
+     the cache */
+  {
+    insn_word_entry *word;
+    for (word = instruction->words;
+	 word != NULL;
+	 word = word->next)
+      {
+	insn_field_entry *cur_field;
+	for (cur_field = word->first;
+	     cur_field->first < options.insn_bit_size;
+	     cur_field = cur_field->next)
+	  {
+	    if (cur_field->type == insn_field_string)
+	      {
+		cache_entry *cache_rule;
+		cache_entry_type value_type = cache_value;
+		line_ref *value_line = instruction->line;
+		/* check the cache table to see if it contains a rule
+		   overriding the default cache action for an
+		   instruction field */
+		for (cache_rule = cache_rules;
+		     cache_rule != NULL;
+		     cache_rule = cache_rule->next)
+		  {
+		    if (filter_is_subset (instruction->field_names,
+					  cache_rule->original_fields)
+			&& strcmp (cache_rule->name, cur_field->val_string) == 0)
+		      {
+			value_type = cache_rule->entry_type;
+			value_line = cache_rule->line;
+			if (value_type == compute_value)
+			  {
+			    options.warning (cache_rule->line,
+					     "instruction field of type `compute' changed to `cache'\n");
+			    cache_rule->entry_type = cache_value;
+			  }
+			break;
+		      }
+		  }
+		/* Define an entry for the field within the
+                   instruction */
+		print_icache_extraction (file,
+					 instruction->format_name,
+					 value_type,
+					 cur_field->val_string, /* name */
+					 NULL, /* type */
+					 NULL, /* expression */
+					 cur_field->val_string, /* insn field */
+					 value_line,
+					 cur_field,
+					 expanded_bits,
+					 what_to_declare,
+					 what_to_do);
+	      }
+	  }
+      }
+  }
+
+  /* pass two - any cache fields not processed above */
+  {
+    cache_entry *cache_rule;
+    for (cache_rule = cache_rules;
+	 cache_rule != NULL;
+	 cache_rule = cache_rule->next)
+      {
+	if (filter_is_subset (instruction->field_names,
+			      cache_rule->original_fields)
+	    && !filter_is_member (instruction->field_names,
+				  cache_rule->name))
+	  {
+	    char *single_field = filter_next (cache_rule->original_fields, "");
+	    if (filter_next (cache_rule->original_fields, single_field) != NULL)
+	      single_field = NULL;
+	    print_icache_extraction (file,
+				     instruction->format_name,
+				     cache_rule->entry_type,
+				     cache_rule->name,
+				     cache_rule->type,
+				     cache_rule->expression,
+				     single_field,
+				     cache_rule->line,
+				     NULL, /* cur_field */
+				     expanded_bits,
+				     what_to_declare,
+				     what_to_do);
+	  }
+      }
+  }
+
+  lf_print__internal_ref (file);
+}
+
+
+
+typedef struct _form_fields form_fields;
+struct _form_fields {
+  char *name;
+  filter *fields;
+  form_fields *next;
+};
+
+static form_fields *
+insn_table_cache_fields (insn_table *isa)
+{
+  form_fields *forms = NULL;
+  insn_entry *insn;
+  for (insn = isa->insns;
+       insn != NULL;
+       insn = insn->next) {
+    form_fields **form = &forms;
+    while (1)
+      {
+	if (*form == NULL)
+	  {
+	    /* new format name, add it */
+	    form_fields *new_form = ZALLOC (form_fields);
+	    new_form->name = insn->format_name;
+	    filter_add (&new_form->fields, insn->field_names);
+	    *form = new_form;
+	    break;
+	  }
+	else if (strcmp ((*form)->name, insn->format_name) == 0)
+	  {
+	    /* already present, add field names to the existing list */
+	    filter_add (&(*form)->fields, insn->field_names);
+	    break;
+	  }
+	form = &(*form)->next;
+      }
+  }
+  return forms;
+}
+
+
+
+extern void
+print_icache_struct (lf *file,
+		     insn_table *isa,
+		     cache_entry *cache_rules)
+{
+  /* Create a list of all the different instruction formats with their
+     corresponding field names. */
+  form_fields *formats = insn_table_cache_fields (isa);
+  
+  lf_printf (file, "\n");
+  lf_printf (file, "#define WITH_%sIDECODE_CACHE_SIZE %d\n",
+	     options.module.global.prefix.u,
+	     (options.gen.icache ? options.gen.icache_size : 0));
+  lf_printf (file, "\n");
+  
+  /* create an instruction cache if being used */
+  if (options.gen.icache) {
+    lf_printf (file, "typedef struct _%sidecode_cache {\n",
+	       options.module.global.prefix.l);
+    lf_indent (file, +2);
+    {
+      form_fields *format;
+      lf_printf (file, "unsigned_word address;\n");
+      lf_printf (file, "void *semantic;\n");
+      lf_printf (file, "union {\n");
+      lf_indent (file, +2);
+      for (format = formats;
+	   format != NULL;
+	   format = format->next)
+	{
+	  lf_printf (file, "struct {\n");
+	  lf_indent (file, +2);
+	  {
+	    cache_entry *cache_rule;
+	    char *field;
+	    /* space for any instruction words */
+	    if (options.gen.insn_in_icache)
+	      lf_printf (file, "instruction_word insn[%d];\n", isa->max_nr_words);
+	    /* define an entry for any applicable cache rules */
+	    for (cache_rule = cache_rules;
+		 cache_rule != NULL;
+		 cache_rule = cache_rule->next)
+	      {
+		/* nb - sort of correct - should really check against
+                   individual instructions */
+		if (filter_is_subset (format->fields, cache_rule->original_fields))
+		  {
+		    char *memb;
+		    lf_printf (file, "%s %s;",
+			       (cache_rule->type == NULL
+				? "unsigned" 
+				: cache_rule->type),
+			       cache_rule->name);
+		    lf_printf (file, " /*");
+		    for (memb = filter_next (cache_rule->original_fields, "");
+			 memb != NULL;
+			 memb = filter_next (cache_rule->original_fields, memb))
+		      {
+			lf_printf (file, " %s", memb);
+		      }
+		    lf_printf (file, " */\n");
+		  }
+	      }
+	    /* define an entry for any fields not covered by a cache rule */
+	    for (field = filter_next (format->fields, "");
+		 field != NULL;
+		 field = filter_next (format->fields, field))
+	      {
+		cache_entry *cache_rule;
+		int found_rule = 0;
+		for (cache_rule = cache_rules;
+		     cache_rule != NULL;
+		     cache_rule = cache_rule->next)
+		  {
+		    if (strcmp (cache_rule->name, field) == 0)
+		      {
+			found_rule = 1;
+			break;
+		      }
+		  }
+		if (!found_rule)
+		  lf_printf (file, "unsigned %s; /* default */\n", field);
+	      }
+	  }
+	  lf_indent (file, -2);
+	  lf_printf (file, "} %s;\n", format->name);
+	}
+      lf_indent (file, -2);
+      lf_printf (file, "} crack;\n");
+    }
+    lf_indent (file, -2);
+    lf_printf (file, "} %sidecode_cache;\n", options.module.global.prefix.l);
+  }
+  else
+    {
+      /* alernativly, since no cache, emit a dummy definition for
+	 idecode_cache so that code refering to the type can still compile */
+      lf_printf(file, "typedef void %sidecode_cache;\n",
+		options.module.global.prefix.l);
+    }
+  lf_printf (file, "\n");
+}
+
+
+
+static void
+print_icache_function (lf *file,
+		       insn_entry *instruction,
+		       opcode_bits *expanded_bits,
+		       insn_opcodes *opcodes,
+		       cache_entry *cache_rules,
+		       int nr_prefetched_words)
+{
+  int indent;
+
+  /* generate code to enter decoded instruction into the icache */
+  lf_printf(file, "\n");
+  lf_print__function_type_function (file, print_icache_function_type,
+				    "EXTERN_ICACHE", "\n");
+  indent = print_function_name (file,
+				instruction->name,
+				instruction->format_name,
+				NULL,
+				expanded_bits,
+				function_name_prefix_icache);
+  indent += lf_printf (file, " ");
+  lf_indent (file, +indent);
+  lf_printf (file, "(");
+  print_icache_function_formal (file, nr_prefetched_words);
+  lf_printf (file, ")\n");
+  lf_indent (file, -indent);
+  
+  /* function header */
+  lf_printf (file, "{\n");
+  lf_indent (file, +2);
+  
+  print_my_defines (file,
+		    instruction->name,
+		    instruction->format_name,
+		    expanded_bits);
+  print_itrace (file, instruction, 1/*putting-value-in-cache*/);
+  
+  print_idecode_validate (file, instruction, opcodes);
+  
+  lf_printf (file, "\n");
+  lf_printf (file, "{\n");
+  lf_indent (file, +2);
+  if (options.gen.semantic_icache)
+    lf_printf (file, "unsigned_word nia;\n");
+  print_icache_body (file,
+		     instruction,
+		     expanded_bits,
+		     cache_rules,
+		     (options.gen.direct_access
+		      ? define_variables
+		      : declare_variables),
+		     (options.gen.semantic_icache
+		      ? both_values_and_icache
+		      : put_values_in_icache),
+		     nr_prefetched_words);
+  
+  lf_printf (file, "\n");
+  lf_printf (file, "cache_entry->address = cia;\n");
+  lf_printf (file, "cache_entry->semantic = ");
+  print_function_name (file,
+		       instruction->name,
+		       instruction->format_name,
+		       NULL,
+		       expanded_bits,
+		       function_name_prefix_semantics);
+  lf_printf (file, ";\n");
+  lf_printf (file, "\n");
+
+  if (options.gen.semantic_icache) {
+    lf_printf (file, "/* semantic routine */\n");
+    print_semantic_body (file,
+			 instruction,
+			 expanded_bits,
+			 opcodes);
+    lf_printf (file, "return nia;\n");
+  }
+  
+  if (!options.gen.semantic_icache)
+    {
+      lf_printf (file, "/* return the function proper */\n");
+      lf_printf (file, "return ");
+      print_function_name (file,
+			   instruction->name,
+			   instruction->format_name,
+			   NULL,
+			   expanded_bits,
+			   function_name_prefix_semantics);
+      lf_printf (file, ";\n");
+    }
+  
+  if (options.gen.direct_access)
+    {
+      print_icache_body (file,
+			 instruction,
+			 expanded_bits,
+			 cache_rules,
+			 undef_variables,
+			 (options.gen.semantic_icache
+			  ? both_values_and_icache
+			  : put_values_in_icache),
+			 nr_prefetched_words);
+    }
+  
+  lf_indent (file, -2);
+  lf_printf (file, "}\n");
+  lf_indent (file, -2);
+  lf_printf (file, "}\n");
+}
+
+
+void
+print_icache_definition (lf *file,
+			 insn_entry *insn,
+			 opcode_bits *expanded_bits,
+			 insn_opcodes *opcodes,
+			 cache_entry *cache_rules,
+			 int nr_prefetched_words)
+{
+  print_icache_function (file,
+			 insn,
+			 expanded_bits,
+			 opcodes,
+			 cache_rules,
+			 nr_prefetched_words);
+}
+
+
+
+void
+print_icache_internal_function_declaration (lf *file,
+					    function_entry *function,
+					    void *data)
+{
+  ASSERT (options.gen.icache);
+  if (function->is_internal)
+    {
+      lf_printf (file, "\n");
+      lf_print__function_type_function (file, print_icache_function_type,
+					"INLINE_ICACHE", "\n");
+      print_function_name (file,
+			   function->name,
+			   NULL,
+			   NULL,
+			   NULL,
+			   function_name_prefix_icache);
+      lf_printf (file, "\n(");
+      print_icache_function_formal (file, 0);
+      lf_printf (file, ");\n");
+    }
+}
+
+
+void
+print_icache_internal_function_definition (lf *file,
+					   function_entry *function,
+					   void *data)
+{
+  ASSERT (options.gen.icache);
+  if (function->is_internal)
+    {
+      lf_printf (file, "\n");
+      lf_print__function_type_function (file, print_icache_function_type,
+					"INLINE_ICACHE", "\n");
+      print_function_name (file,
+			   function->name,
+			   NULL,
+			   NULL,
+			   NULL,
+			   function_name_prefix_icache);
+      lf_printf (file, "\n(");
+      print_icache_function_formal (file, 0);
+      lf_printf (file, ")\n");
+      lf_printf (file, "{\n");
+      lf_indent (file, +2);
+      lf_printf (file, "/* semantic routine */\n");
+      if (options.gen.semantic_icache)
+	{
+	  lf_print__line_ref (file, function->code->line);
+	  table_print_code (file, function->code);
+	  lf_printf (file, "error (\"Internal function must longjump\\n\");\n");
+	  lf_printf (file, "return 0;\n");
+	}
+      else
+	{
+	  lf_printf (file, "return ");
+	  print_function_name (file,
+			       function->name,
+			       NULL,
+			       NULL,
+			       NULL,
+			       function_name_prefix_semantics);
+	  lf_printf (file, ";\n");
+	}
+      
+      lf_print__internal_ref (file);
+      lf_indent (file, -2);
+      lf_printf (file, "}\n");
+    }
+}