1/* Declarations for stacks of tokenized Xtensa instructions.
2   Copyright (C) 2003, 2004 Free Software Foundation, Inc.
3
4   This file is part of GAS, the GNU Assembler.
5
6   GAS is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2, or (at your option)
9   any later version.
10
11   GAS is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with GAS; see the file COPYING.  If not, write to the Free
18   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
19   02110-1301, USA.  */
20
21#ifndef XTENSA_ISTACK_H
22#define XTENSA_ISTACK_H
23
24#include "xtensa-isa.h"
25
26#define MAX_ISTACK 12
27#define MAX_INSN_ARGS 10
28
29enum itype_enum
30{
31  ITYPE_INSN,
32  ITYPE_LITERAL,
33  ITYPE_LABEL
34};
35
36
37/* Literals have 1 token and no opcode.
38   Labels have 1 token and no opcode.  */
39
40typedef struct tinsn_struct
41{
42  enum itype_enum insn_type;
43
44  xtensa_opcode opcode;	/* Literals have an invalid opcode.  */
45  bfd_boolean is_specific_opcode;
46  bfd_boolean keep_wide;
47  int ntok;
48  expressionS tok[MAX_INSN_ARGS];
49  unsigned linenum;
50
51  struct fixP *fixup;
52
53  /* Filled out by relaxation_requirements:  */
54  enum xtensa_relax_statesE subtype;
55  int literal_space;
56  /* Filled out by vinsn_to_insnbuf:  */
57  symbolS *symbol;
58  offsetT offset;
59  fragS *literal_frag;
60} TInsn;
61
62
63/* tinsn_stack:  This is a stack of instructions to  be placed.  */
64
65typedef struct tinsn_stack
66{
67  int ninsn;
68  TInsn insn[MAX_ISTACK];
69} IStack;
70
71
72void istack_init (IStack *);
73bfd_boolean istack_empty (IStack *);
74bfd_boolean istack_full (IStack *);
75TInsn *istack_top (IStack *);
76void istack_push (IStack *, TInsn *);
77TInsn *istack_push_space (IStack *);
78void istack_pop (IStack *);
79
80/* TInsn utilities.  */
81void tinsn_init (TInsn *);
82expressionS *tinsn_get_tok (TInsn *, int);
83
84
85/* vliw_insn: bundles of TInsns.  */
86
87typedef struct vliw_insn
88{
89  xtensa_format format;
90  int num_slots;
91  unsigned int inside_bundle;
92  TInsn slots[MAX_SLOTS];
93  xtensa_insnbuf insnbuf;
94  xtensa_insnbuf slotbuf[MAX_SLOTS];
95} vliw_insn;
96
97#endif /* !XTENSA_ISTACK_H */
98