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[deliverable/binutils-gdb.git] / gas / config / xtensa-istack.h
1 /* Declarations for stacks of tokenized Xtensa instructions.
2 Copyright (C) 2003, 2004, 2007 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 10
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 unsigned linenum;
50
51 /* Filled out by relaxation_requirements: */
52 enum xtensa_relax_statesE subtype;
53 int literal_space;
54 /* Filled out by vinsn_to_insnbuf: */
55 symbolS *symbol;
56 offsetT offset;
57 fragS *literal_frag;
58 } TInsn;
59
60
61 /* tinsn_stack: This is a stack of instructions to be placed. */
62
63 typedef struct tinsn_stack
64 {
65 int ninsn;
66 TInsn insn[MAX_ISTACK];
67 } IStack;
68
69
70 void istack_init (IStack *);
71 bfd_boolean istack_empty (IStack *);
72 bfd_boolean istack_full (IStack *);
73 TInsn *istack_top (IStack *);
74 void istack_push (IStack *, TInsn *);
75 TInsn *istack_push_space (IStack *);
76 void istack_pop (IStack *);
77
78 /* TInsn utilities. */
79 void tinsn_init (TInsn *);
80
81
82 /* vliw_insn: bundles of TInsns. */
83
84 typedef struct vliw_insn
85 {
86 xtensa_format format;
87 int num_slots;
88 unsigned int inside_bundle;
89 TInsn slots[MAX_SLOTS];
90 xtensa_insnbuf insnbuf;
91 xtensa_insnbuf slotbuf[MAX_SLOTS];
92 } vliw_insn;
93
94 #endif /* !XTENSA_ISTACK_H */
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