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 2, 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 */