/* ia64-asmtab.h -- Header for compacted IA-64 opcode tables.
  Copyright (C) 1999-2024 Free Software Foundation, Inc.
  Contributed by Bob Manson of Cygnus Support <[email protected]>

  This file is part of the GNU opcodes library.

  This library 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 3, or (at your option)
  any later version.

  It 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 file; see the file COPYING.  If not, write to the
  Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
  MA 02110-1301, USA.  */

#ifndef IA64_ASMTAB_H
#define IA64_ASMTAB_H

#include "opcode/ia64.h"

/* The primary opcode table is made up of the following: */
struct ia64_main_table
{
 /* The entry in the string table that corresponds to the name of this
    opcode. */
 unsigned short name_index;

 /* The type of opcode; corresponds to the TYPE field in
    struct ia64_opcode. */
 unsigned char opcode_type;

 /* The number of outputs for this opcode. */
 unsigned char num_outputs;

 /* The base insn value for this opcode.  It may be modified by completers. */
 ia64_insn opcode;

 /* The mask of valid bits in OPCODE. Zeros indicate operand fields. */
 ia64_insn mask;

 /* The operands of this instruction.  Corresponds to the OPERANDS field
    in struct ia64_opcode. */
 unsigned char operands[5];

 /* The flags for this instruction.  Corresponds to the FLAGS field in
    struct ia64_opcode. */
 short flags;

 /* The tree of completers for this instruction; this is an offset into
    completer_table. */
 short completers;
};

/* Each instruction has a set of possible "completers", or additional
  suffixes that can alter the instruction's behavior, and which has
  potentially different dependencies.

  The completer entries modify certain bits in the instruction opcode.
  Which bits are to be modified are marked by the BITS, MASK and
  OFFSET fields.  The completer entry may also note dependencies for the
  opcode.

  These completers are arranged in a DAG; the pointers are indexes
  into the completer_table array.  The completer DAG is searched by
  find_completer () and ia64_find_matching_opcode ().

  Note that each completer needs to be applied in turn, so that if we
  have the instruction
       cmp.lt.unc
  the completer entries for both "lt" and "unc" would need to be applied
  to the opcode's value.

  Some instructions do not require any completers; these contain an
  empty completer entry.  Instructions that require a completer do
  not contain an empty entry.

  Terminal completers (those completers that validly complete an
  instruction) are marked by having the TERMINAL_COMPLETER flag set.

  Only dependencies listed in the terminal completer for an opcode are
  considered to apply to that opcode instance. */

struct ia64_completer_table
{
 /* The bit value that this completer sets. */
 unsigned int bits;

 /* And its mask. 1s are bits that are to be modified in the
    instruction. */
 unsigned int mask;

 /* The entry in the string table that corresponds to the name of this
    completer. */
 unsigned short name_index;

 /* An alternative completer, or -1 if this is the end of the chain. */
 short alternative;

 /* A pointer to the DAG of completers that can potentially follow
    this one, or -1. */
 short subentries;

 /* The bit offset in the instruction where BITS and MASK should be
    applied. */
 unsigned char offset : 7;

 unsigned char terminal_completer : 1;

 /* Index into the dependency list table */
 short dependencies;
};

/* This contains sufficient information for the disassembler to resolve
  the complete name of the original instruction.  */
struct ia64_dis_names
{
 /* COMPLETER_INDEX represents the tree of completers that make up
    the instruction.  The LSB represents the top of the tree for the
    specified instruction.

    A 0 bit indicates to go to the next alternate completer via the
    alternative field; a 1 bit indicates that the current completer
    is part of the instruction, and to go down the subentries index.
    We know we've reached the final completer when we run out of 1
    bits.

    There is always at least one 1 bit. */
 unsigned int completer_index ;

 /* The index in the main_table[] array for the instruction. */
 unsigned short insn_index : 11;

 /* If set, the next entry in this table is an alternate possibility
    for this instruction encoding.  Which one to use is determined by
    the instruction type and other factors (see opcode_verify ()).  */
 unsigned int next_flag : 1;

 /* The disassembly priority of this entry among instructions. */
 unsigned short priority;
};

#endif

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