1 /* Declarations for stacks of tokenized Xtensa instructions.
2    Copyright (C) 2003-2016 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 
29 enum 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 
40 typedef 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 
74 typedef struct tinsn_stack
75 {
76   int ninsn;
77   TInsn insn[MAX_ISTACK];
78 } IStack;
79 
80 
81 void istack_init (IStack *);
82 bfd_boolean istack_empty (IStack *);
83 bfd_boolean istack_full (IStack *);
84 TInsn *istack_top (IStack *);
85 void istack_push (IStack *, TInsn *);
86 TInsn *istack_push_space (IStack *);
87 void istack_pop (IStack *);
88 
89 /* TInsn utilities.  */
90 void tinsn_init (TInsn *);
91 
92 
93 /* vliw_insn: bundles of TInsns.  */
94 
95 typedef 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