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/* ARC target-dependent stuff. Extension data structures.
Copyright (C) 1995-2024 Free Software Foundation, Inc.
This file is part of libopcodes.
This library 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.
It 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
/*This header file defines a table of extensions to the ARC processor
architecture. These extensions are read from the '.arcextmap' or
'.gnu.linkonce.arcextmap.<type>.<N>' sections in the ELF file which
is identified by the bfd parameter to the build_ARC_extmap function.
These extensions may include:
core registers
auxiliary registers
instructions
condition codes
Once the table has been constructed, accessor functions may be used
to retrieve information from it.
The build_ARC_extmap constructor function build_ARC_extmap may be
called as many times as required; it will re-initialize the table
each time. */
#ifndef ARC_EXTENSIONS_H
#define ARC_EXTENSIONS_H
#include "opcode/arc.h"
#ifdef __cplusplus
extern "C" {
#endif
#define IGNORE_FIRST_OPD 1
/* Define this if we do not want to encode instructions based on the
ARCompact Programmer's Reference. */
#define UNMANGLED
/* This defines the kinds of extensions which may be read from the
ections in the executable files. */
enum ExtOperType
{
EXT_INSTRUCTION = 0,
EXT_CORE_REGISTER = 1,
EXT_AUX_REGISTER = 2,
EXT_COND_CODE = 3,
EXT_INSTRUCTION32 = 4,
EXT_AC_INSTRUCTION = 4,
EXT_REMOVE_CORE_REG = 5,
EXT_LONG_CORE_REGISTER = 6,
EXT_AUX_REGISTER_EXTENDED = 7,
EXT_INSTRUCTION32_EXTENDED = 8,
EXT_CORE_REGISTER_CLASS = 9
};
enum ExtReadWrite
{
REG_INVALID,
REG_READ,
REG_WRITE,
REG_READWRITE
};
/* Macro used when generating the patterns for an extension
instruction. */
#define INSERT_XOP(OP, NAME, CODE, MASK, CPU, ARG, FLG) \
do { \
(OP)->name = NAME; \
(OP)->opcode = CODE; \
(OP)->mask = MASK; \
(OP)->cpu = CPU; \
(OP)->insn_class = ARITH; \
(OP)->subclass = NONE; \
memcpy ((OP)->operands, (ARG), MAX_INSN_ARGS); \
memcpy ((OP)->flags, (FLG), MAX_INSN_FLGS); \
(OP++); \
} while (0)
/* Typedef to hold the extension instruction definition. */
typedef struct ExtInstruction
{
/* Name. */
char *name;
/* Major opcode. */
char major;
/* Minor(sub) opcode. */
char minor;
/* Flags, holds the syntax class and modifiers. */
char flags;
/* Syntax class. Use by assembler. */
unsigned char syntax;
/* Syntax class modifier. Used by assembler. */
unsigned char modsyn;
/* Suffix class. Used by assembler. */
unsigned char suffix;
/* Pointer to the next extension instruction. */
struct ExtInstruction* next;
} extInstruction_t;
/* Constructor function. */
extern void build_ARC_extmap (bfd *);
/* Accessor functions. */
extern enum ExtReadWrite arcExtMap_coreReadWrite (int);
extern const char * arcExtMap_coreRegName (int);
extern const char * arcExtMap_auxRegName (unsigned);
extern const char * arcExtMap_condCodeName (int);
extern const extInstruction_t *arcExtMap_insn (int, unsigned long long);
extern struct arc_opcode *arcExtMap_genOpcode (const extInstruction_t *,
unsigned arc_target,
const char **errmsg);
/* Dump function (for debugging). */
extern void dump_ARC_extmap (void);
#ifdef __cplusplus
}
#endif
#endif /* ARC_EXTENSIONS_H */
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