sim/igen/gen.h

/*  This file is part of the program psim.

    Copyright (C) 1994,1995,1996, 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.
 
    */


typedef struct _opcode_field opcode_field;
struct _opcode_field {
  int word_nr;
  int first;
  int last;
  int is_boolean;
  int nr_opcodes;
  unsigned boolean_constant;
  opcode_field *parent;
};

typedef struct _opcode_bits opcode_bits;
struct _opcode_bits {
  int value;
  int first;
  int last;
  insn_field_entry *field;
  opcode_field *opcode;
  opcode_bits *next;
};

typedef struct _insn_opcodes insn_opcodes;
struct _insn_opcodes {
  opcode_field *opcode;
  insn_opcodes *next;
};

typedef struct _insn_list insn_list;
struct _insn_list {
  /* the instruction */
  insn_entry *insn;
  /* list of non constant bits that have been made constant */
  opcode_bits *expanded_bits;
  /* list of the various opcode field paths used to reach this
     instruction */
  insn_opcodes *opcodes;
  /* number of prefetched words for this instruction */
  int nr_prefetched_words;
  /* The semantic function list_entry corresponding to this insn */
  insn_list *semantic;
  /* linked list */
  insn_list *next;
};

/* forward */
typedef struct _gen_list gen_list;

typedef struct _gen_entry gen_entry;
struct _gen_entry {

  /* as an entry in a table */
  int word_nr;
  int opcode_nr;
  gen_entry *sibling;
  opcode_bits *expanded_bits;
  gen_entry *parent; /* parent has the opcode* data */

  /* as a table containing entries */
  decode_table *opcode_rule;
  opcode_field *opcode;
  int nr_prefetched_words;
  int nr_entries;
  gen_entry *entries;

  /* as both an entry and a table */
  int nr_insns;
  insn_list *insns;

  /* if siblings are being combined */
  gen_entry *combined_next;
  gen_entry *combined_parent;

  /* our top-of-tree */
  gen_list *top;
};


struct _gen_list {
  model_entry *model;
  insn_table *isa;
  gen_entry *table;
  gen_list *next;
};


typedef struct _gen_table gen_table;
struct _gen_table {
  /* list of all the instructions */
  insn_table *isa;
  /* list of all the semantic functions */
  decode_table *rules;
  /* list of all the generated instruction tables */
  gen_list *tables;
  /* list of all the semantic functions */
  int nr_semantics;
  insn_list *semantics;
};


extern gen_table *make_gen_tables
(insn_table *isa,
 decode_table *rules);


extern void gen_tables_expand_insns
(gen_table *gen);

extern void gen_tables_expand_semantics
(gen_table *gen);

extern int gen_entry_depth
(gen_entry *table);



/* Traverse the created data structure */

typedef void gen_entry_handler
(lf *file,
 gen_entry *entry,
 int depth,
 void *data);

extern void gen_entry_traverse_tree
(lf *file,
 gen_entry *table,
 int depth,
 gen_entry_handler *start,
 gen_entry_handler *leaf,
 gen_entry_handler *end,
 void *data);



/* Misc functions - actually in igen.c */


/* Cache functions: */

extern int print_icache_function_formal
(lf *file, int nr_prefetched_words);

extern int print_icache_function_actual
(lf *file, int nr_prefetched_words);

extern int print_icache_function_type
(lf *file);

extern int print_semantic_function_formal
(lf *file, int nr_prefetched_words);

extern int print_semantic_function_actual
(lf *file, int nr_prefetched_words);

extern int print_semantic_function_type
(lf *file);

extern int print_idecode_function_formal
(lf *file, int nr_prefetched_words);

extern int print_idecode_function_actual
(lf *file, int nr_prefetched_words);

typedef enum {
  function_name_prefix_semantics,
  function_name_prefix_idecode,
  function_name_prefix_itable,
  function_name_prefix_icache,
  function_name_prefix_engine,
  function_name_prefix_none
} lf_function_name_prefixes;

typedef enum {
  is_function_declaration = 0,
  is_function_definition = 1,
  is_function_variable,
} function_decl_type;

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);

extern void print_my_defines
(lf *file,
 const char *basename,
 const char *format_name,
 opcode_bits *expanded_bits);

extern void print_itrace
(lf *file,
 insn_entry *insn,
 int idecode);

extern void print_sim_engine_abort
(lf *file,
 const char *message);


extern void print_include (lf *file, igen_module module);
extern void print_include_inline  (lf *file, igen_module module);
extern void print_includes (lf *file);