gas/config/xtensa-istack.h

   1 /* Declarations for stacks of tokenized Xtensa instructions.
   2    Copyright (C) 2003, 2004, 2007, 2008 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 */