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/* Declarations for stacks of tokenized Xtensa instructions.

   Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.

   This file is part of GAS, the GNU Assembler.

   GAS 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.

   GAS 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 GAS; see the file COPYING.  If not, write to the Free

   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA

   02110-1301, USA.  */

#ifndef XTENSA_ISTACK_H

#define XTENSA_ISTACK_H

#include "xtensa-isa.h"

#define MAX_ISTACK 12

#define MAX_INSN_ARGS 10

enum itype_enum

{

  ITYPE_INSN,

  ITYPE_LITERAL,

  ITYPE_LABEL

};

/* Literals have 1 token and no opcode.

   Labels have 1 token and no opcode.  */

typedef struct tinsn_struct

{

  enum itype_enum insn_type;

  xtensa_opcode opcode; /* Literals have an invalid opcode.  */

  bfd_boolean is_specific_opcode;

  bfd_boolean keep_wide;

  int ntok;

  expressionS tok[MAX_INSN_ARGS];

  bfd_boolean loc_directive_seen;

  struct dwarf2_line_info debug_line;

  /* Filled out by relaxation_requirements:  */

  enum xtensa_relax_statesE subtype;

  int literal_space;

  /* Filled out by vinsn_to_insnbuf:  */

  symbolS *symbol;

  offsetT offset;

  fragS *literal_frag;

} TInsn;

/* tinsn_stack:  This is a stack of instructions to  be placed.  */

typedef struct tinsn_stack

{

  int ninsn;

  TInsn insn[MAX_ISTACK];

} IStack;

void istack_init (IStack *);

bfd_boolean istack_empty (IStack *);

bfd_boolean istack_full (IStack *);

TInsn *istack_top (IStack *);

void istack_push (IStack *, TInsn *);

TInsn *istack_push_space (IStack *);

void istack_pop (IStack *);

/* TInsn utilities.  */

void tinsn_init (TInsn *);

/* vliw_insn: bundles of TInsns.  */

typedef struct vliw_insn

{

  xtensa_format format;

  int num_slots;

  unsigned int inside_bundle;

  TInsn slots[MAX_SLOTS];

  xtensa_insnbuf insnbuf;

  xtensa_insnbuf slotbuf[MAX_SLOTS];

} vliw_insn;

#endif /* !XTENSA_ISTACK_H */