1/* Declarations for stacks of tokenized Xtensa instructions.
2   Copyright (C) 2003-2017 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 3, 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 64
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  bfd_boolean loc_directive_seen;
50  struct dwarf2_line_info debug_line;
51
52  /* This field is used for two types of special pseudo ops:
53     1. TLS-related operations.  Eg:  callx8.tls
54     2. j.l  label, a2
55
56     For the tls-related operations, it will hold a tls-related opcode
57     and info to be used in a fixup.  For j.l it will hold a
58     register to be used during relaxation.  */
59  expressionS extra_arg;
60
61  /* Filled out by relaxation_requirements:  */
62  enum xtensa_relax_statesE subtype;
63  int literal_space;
64
65  /* Filled out by vinsn_to_insnbuf:  */
66  symbolS *symbol;
67  offsetT offset;
68  fragS *literal_frag;
69} TInsn;
70
71
72/* tinsn_stack:  This is a stack of instructions to  be placed.  */
73
74typedef struct tinsn_stack
75{
76  int ninsn;
77  TInsn insn[MAX_ISTACK];
78} IStack;
79
80
81void istack_init (IStack *);
82bfd_boolean istack_empty (IStack *);
83bfd_boolean istack_full (IStack *);
84TInsn *istack_top (IStack *);
85void istack_push (IStack *, TInsn *);
86TInsn *istack_push_space (IStack *);
87void istack_pop (IStack *);
88
89/* TInsn utilities.  */
90void tinsn_init (TInsn *);
91
92
93/* vliw_insn: bundles of TInsns.  */
94
95typedef struct vliw_insn
96{
97  xtensa_format format;
98  int num_slots;
99  unsigned int inside_bundle;
100  TInsn slots[MAX_SLOTS];
101  xtensa_insnbuf insnbuf;
102  xtensa_insnbuf slotbuf[MAX_SLOTS];
103} vliw_insn;
104
105#endif /* !XTENSA_ISTACK_H */
106