mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
143 lines
3.4 KiB
C
143 lines
3.4 KiB
C
/* Table of relaxations for Xtensa assembly.
|
|
Copyright 2003 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 2, 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, 59 Temple Place - Suite 330, Boston,
|
|
MA 02111-1307, USA. */
|
|
|
|
#ifndef XTENSA_RELAX_H
|
|
#define XTENSA_RELAX_H
|
|
|
|
#include "xtensa-isa.h"
|
|
|
|
|
|
/* Data structures for the table-driven relaxations for Xtensa processors.
|
|
See xtensa-relax.c for details. */
|
|
|
|
typedef struct transition_list TransitionList;
|
|
typedef struct transition_table TransitionTable;
|
|
typedef struct transition_rule TransitionRule;
|
|
typedef struct precondition_list PreconditionList;
|
|
typedef struct precondition Precondition;
|
|
|
|
struct transition_table
|
|
{
|
|
int num_opcodes;
|
|
TransitionList **table; /* Possible transitions for each opcode. */
|
|
};
|
|
|
|
struct transition_list
|
|
{
|
|
TransitionRule *rule;
|
|
TransitionList *next;
|
|
};
|
|
|
|
struct precondition_list
|
|
{
|
|
Precondition *precond;
|
|
PreconditionList *next;
|
|
};
|
|
|
|
|
|
/* Operand types and constraints on operands: */
|
|
|
|
typedef enum op_type OpType;
|
|
typedef enum cmp_op CmpOp;
|
|
|
|
enum op_type
|
|
{
|
|
OP_CONSTANT,
|
|
OP_OPERAND,
|
|
OP_OPERAND_LOW8, /* Sign-extended low 8 bits of immed. */
|
|
OP_OPERAND_HI24S, /* high 24 bits of immed,
|
|
plus 0x100 if low 8 bits are signed. */
|
|
OP_OPERAND_F32MINUS, /* 32 - immed. */
|
|
OP_LITERAL,
|
|
OP_LABEL
|
|
};
|
|
|
|
enum cmp_op
|
|
{
|
|
OP_EQUAL,
|
|
OP_NOTEQUAL,
|
|
};
|
|
|
|
struct precondition
|
|
{
|
|
CmpOp cmp;
|
|
int op_num;
|
|
OpType typ; /* CONSTANT: op_data is a constant.
|
|
OPERAND: operand op_num must equal op_data.
|
|
Cannot be LITERAL or LABEL. */
|
|
int op_data;
|
|
};
|
|
|
|
typedef struct build_op BuildOp;
|
|
|
|
struct build_op
|
|
{
|
|
int op_num;
|
|
OpType typ;
|
|
unsigned op_data; /* CONSTANT: op_data is the value to encode.
|
|
OPERAND: op_data is the field in the
|
|
source instruction to take the value from
|
|
and encode in the op_num field here.
|
|
LITERAL or LABEL: op_data is the ordinal
|
|
that identifies the appropriate one, i.e.,
|
|
there can be more than one literal or
|
|
label in an expansion. */
|
|
BuildOp *next;
|
|
};
|
|
|
|
typedef struct build_instr BuildInstr;
|
|
typedef enum instr_type InstrType;
|
|
|
|
enum instr_type
|
|
{
|
|
INSTR_INSTR,
|
|
INSTR_LITERAL_DEF,
|
|
INSTR_LABEL_DEF
|
|
};
|
|
|
|
struct build_instr
|
|
{
|
|
InstrType typ;
|
|
unsigned id; /* LITERAL_DEF or LABEL_DEF: an ordinal to
|
|
identify which one. */
|
|
xtensa_opcode opcode; /* unused for LITERAL_DEF or LABEL_DEF. */
|
|
BuildOp *ops;
|
|
BuildInstr *next;
|
|
};
|
|
|
|
struct transition_rule
|
|
{
|
|
xtensa_opcode opcode;
|
|
PreconditionList *conditions;
|
|
BuildInstr *to_instr;
|
|
};
|
|
|
|
extern TransitionTable *xg_build_simplify_table
|
|
PARAMS ((void));
|
|
extern TransitionTable *xg_build_widen_table
|
|
PARAMS ((void));
|
|
|
|
extern bfd_boolean xg_has_userdef_op_fn
|
|
PARAMS ((OpType));
|
|
extern long xg_apply_userdef_op_fn
|
|
PARAMS ((OpType, long));
|
|
|
|
#endif /* !XTENSA_RELAX_H */
|