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/* Declarations for stacks of tokenized Xtensa instructions.
Copyright (C) 2003-2021 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#ifndef XTENSA_ISTACK_H
#define XTENSA_ISTACK_H
#include "xtensa-isa.h"
#define MAX_ISTACK 12
#define MAX_INSN_ARGS 64
enum itype_enum
{
ITYPE_INSN,
ITYPE_LITERAL,
ITYPE_LABEL
};
/* Literals have 1 token and no opcode.
Labels have 1 token and no opcode. */
typedef struct tinsn_struct
{
enum itype_enum insn_type;
xtensa_opcode opcode; /* Literals have an invalid opcode. */
bool is_specific_opcode;
bool keep_wide;
int ntok;
expressionS tok[MAX_INSN_ARGS];
bool loc_directive_seen;
struct dwarf2_line_info debug_line;
/* This field is used for two types of special pseudo ops:
1. TLS-related operations. Eg: callx8.tls
2. j.l label, a2
For the tls-related operations, it will hold a tls-related opcode
and info to be used in a fixup. For j.l it will hold a
register to be used during relaxation. */
expressionS extra_arg;
/* Filled out by relaxation_requirements: */
enum xtensa_relax_statesE subtype;
int literal_space;
/* Filled out by vinsn_to_insnbuf: */
symbolS *symbol;
offsetT offset;
fragS *literal_frag;
} TInsn;
/* tinsn_stack: This is a stack of instructions to be placed. */
typedef struct tinsn_stack
{
int ninsn;
TInsn insn[MAX_ISTACK];
} IStack;
void istack_init (IStack *);
bool istack_empty (IStack *);
bool istack_full (IStack *);
TInsn *istack_top (IStack *);
void istack_push (IStack *, TInsn *);
TInsn *istack_push_space (IStack *);
void istack_pop (IStack *);
/* TInsn utilities. */
void tinsn_init (TInsn *);
/* vliw_insn: bundles of TInsns. */
typedef struct vliw_insn
{
xtensa_format format;
int num_slots;
unsigned int inside_bundle;
TInsn slots[MAX_SLOTS];
xtensa_insnbuf insnbuf;
xtensa_insnbuf slotbuf[MAX_SLOTS];
} vliw_insn;
#endif /* !XTENSA_ISTACK_H */
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