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/* Opcode decoder for the Renesas RL78
Copyright 2011
Free Software Foundation, Inc.
Written by DJ Delorie <dj@redhat.com>
This file is part of GDB, the GNU Debugger and GAS, the GNU Assembler.
This program 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 of the License, or
(at your option) any later version.
This program 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. */
/* The RL78 decoder in libopcodes is used by the simulator, gdb's
analyzer, and the disassembler. Given an opcode data source, it
decodes the next opcode into the following structures. */
#ifndef RL78_OPCODES_H_INCLUDED
#define RL78_OPCODES_H_INCLUDED
/* For the purposes of these structures, the RL78 registers are as
follows, despite most of these being memory-mapped and
bank-switched: */
typedef enum {
RL78_Reg_None,
/* The order of these matches the encodings. */
RL78_Reg_X,
RL78_Reg_A,
RL78_Reg_C,
RL78_Reg_B,
RL78_Reg_E,
RL78_Reg_D,
RL78_Reg_L,
RL78_Reg_H,
/* The order of these matches the encodings. */
RL78_Reg_AX,
RL78_Reg_BC,
RL78_Reg_DE,
RL78_Reg_HL,
/* Unordered. */
RL78_Reg_SP,
RL78_Reg_PSW,
RL78_Reg_CS,
RL78_Reg_ES,
RL78_Reg_PMC,
RL78_Reg_MEM
} RL78_Register;
typedef enum
{
RL78_Byte = 0,
RL78_Word
} RL78_Size;
typedef enum {
RL78_Condition_T,
RL78_Condition_F,
RL78_Condition_C,
RL78_Condition_NC,
RL78_Condition_H,
RL78_Condition_NH,
RL78_Condition_Z,
RL78_Condition_NZ
} RL78_Condition;
typedef enum {
RL78_Operand_None = 0,
RL78_Operand_Immediate, /* #addend */
RL78_Operand_Register, /* reg */
RL78_Operand_Indirect, /* [reg + reg2 + addend] */
RL78_Operand_Bit, /* reg.bit */
RL78_Operand_BitIndirect, /* [reg+reg2+addend].bit */
RL78_Operand_PreDec, /* [--reg] = push */
RL78_Operand_PostInc /* [reg++] = pop */
} RL78_Operand_Type;
typedef enum
{
RLO_unknown,
RLO_add, /* d += s */
RLO_addc, /* d += s + CY */
RLO_and, /* d &= s (byte, word, bit) */
RLO_branch, /* pc = d */
RLO_branch_cond, /* pc = d if cond(src) */
RLO_branch_cond_clear, /* pc = d if cond(src), and clear(src) */
RLO_break, /* BRK */
RLO_call, /* call */
RLO_cmp, /* cmp d, s */
RLO_divhu, /* DIVHU */
RLO_divwu, /* DIVWU */
RLO_halt, /* HALT */
RLO_mov, /* d = s */
RLO_mach, /* MACH */
RLO_machu, /* MACHU */
RLO_mulu, /* MULU */
RLO_mulh, /* MULH */
RLO_mulhu, /* MULHU */
RLO_nop, /* NOP */
RLO_or, /* d |= s */
RLO_ret, /* RET */
RLO_reti, /* RETI */
RLO_rol, /* d <<= s, MSB to LSB and CY */
RLO_rolc, /* d <<= s, MSB to CY, CY, to LSB */
RLO_ror, /* d >>= s, LSB to MSB and CY */
RLO_rorc, /* d >>= s, LSB to CY, CY, to MSB */
RLO_sar, /* d >>= s, signed */
RLO_sel, /* rb = s */
RLO_shr, /* d >>= s, unsigned */
RLO_shl, /* d <<= s */
RLO_skip, /* skip next insn is cond(s) */
RLO_stop, /* STOP */
RLO_sub, /* d -= s */
RLO_subc, /* d -= s - CY */
RLO_xch, /* swap d, s */
RLO_xor, /* d ^= s */
} RL78_Opcode_ID;
typedef struct {
RL78_Operand_Type type;
int addend;
RL78_Register reg : 8;
RL78_Register reg2 : 8;
unsigned char bit_number : 4;
unsigned char condition : 3;
unsigned char use_es : 1;
} RL78_Opcode_Operand;
/* PSW flag bits */
#define RL78_PSW_IE 0x80
#define RL78_PSW_Z 0x40
#define RL78_PSW_RBS1 0x20
#define RL78_PSW_AC 0x10
#define RL78_PSW_RBS0 0x08
#define RL78_PSW_ISP1 0x04
#define RL78_PSW_ISP0 0x02
#define RL78_PSW_CY 0x01
#define RL78_SFR_SP 0xffff8
#define RL78_SFR_PSW 0xffffa
#define RL78_SFR_CS 0xffffc
#define RL78_SFR_ES 0xffffd
#define RL78_SFR_PMC 0xffffe
#define RL78_SFR_MEM 0xfffff
typedef struct
{
int lineno;
RL78_Opcode_ID id:24;
unsigned flags:8; /* PSW mask, for side effects only */
int n_bytes;
char * syntax;
RL78_Size size;
/* By convention, these are destination, source. */
RL78_Opcode_Operand op[2];
} RL78_Opcode_Decoded;
int rl78_decode_opcode (unsigned long, RL78_Opcode_Decoded *, int (*)(void *), void *);
#endif
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