gas/config/xtensa-istack.h

   1 /* Declarations for stacks of tokenized Xtensa instructions.
   2    Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #ifndef XTENSA_ISTACK_H
  23 #define XTENSA_ISTACK_H
  24
  25 #include "xtensa-isa.h"
  26
  27 #define MAX_ISTACK 12
  28 #define MAX_INSN_ARGS 64
  29
  30 enum itype_enum
  31 {
  32   ITYPE_INSN,
  33   ITYPE_LITERAL,
  34   ITYPE_LABEL
  35 };
  36
  37
  38 /* Literals have 1 token and no opcode.
  39    Labels have 1 token and no opcode.  */
  40
  41 typedef struct tinsn_struct
  42 {
  43   enum itype_enum insn_type;
  44
  45   xtensa_opcode opcode; /* Literals have an invalid opcode.  */
  46   bfd_boolean is_specific_opcode;
  47   bfd_boolean keep_wide;
  48   int ntok;
  49   expressionS tok[MAX_INSN_ARGS];
  50   bfd_boolean loc_directive_seen;
  51   struct dwarf2_line_info debug_line;
  52
  53   /* This field is used for two types of special pseudo ops:
  54      1. TLS-related operations.  Eg:  callx8.tls
  55      2. j.l  label, a2
  56
  57      For the tls-related operations, it will hold a tls-related opcode
  58      and info to be used in a fixup.  For j.l it will hold a
  59      register to be used during relaxation.  */
  60   expressionS extra_arg;
  61
  62   /* Filled out by relaxation_requirements:  */
  63   enum xtensa_relax_statesE subtype;
  64   int literal_space;
  65
  66   /* Filled out by vinsn_to_insnbuf:  */
  67   symbolS *symbol;
  68   offsetT offset;
  69   fragS *literal_frag;
  70 } TInsn;
  71
  72
  73 /* tinsn_stack:  This is a stack of instructions to  be placed.  */
  74
  75 typedef struct tinsn_stack
  76 {
  77   int ninsn;
  78   TInsn insn[MAX_ISTACK];
  79 } IStack;
  80
  81
  82 void istack_init (IStack *);
  83 bfd_boolean istack_empty (IStack *);
  84 bfd_boolean istack_full (IStack *);
  85 TInsn *istack_top (IStack *);
  86 void istack_push (IStack *, TInsn *);
  87 TInsn *istack_push_space (IStack *);
  88 void istack_pop (IStack *);
  89
  90 /* TInsn utilities.  */
  91 void tinsn_init (TInsn *);
  92
  93
  94 /* vliw_insn: bundles of TInsns.  */
  95
  96 typedef struct vliw_insn
  97 {
  98   xtensa_format format;
  99   int num_slots;
 100   unsigned int inside_bundle;
 101   TInsn slots[MAX_SLOTS];
 102   xtensa_insnbuf insnbuf;
 103   xtensa_insnbuf slotbuf[MAX_SLOTS];
 104 } vliw_insn;
 105
 106 #endif /* !XTENSA_ISTACK_H */