169 lines
4.5 KiB
C
169 lines
4.5 KiB
C
/* Opcode decoder for the Renesas RL78
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Copyright 2011
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Free Software Foundation, Inc.
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Written by DJ Delorie <dj@redhat.com>
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This file is part of GDB, the GNU Debugger and GAS, the GNU Assembler.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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/* The RL78 decoder in libopcodes is used by the simulator, gdb's
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analyzer, and the disassembler. Given an opcode data source, it
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decodes the next opcode into the following structures. */
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#ifndef RL78_OPCODES_H_INCLUDED
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#define RL78_OPCODES_H_INCLUDED
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/* For the purposes of these structures, the RL78 registers are as
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follows, despite most of these being memory-mapped and
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bank-switched: */
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typedef enum {
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RL78_Reg_None,
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/* The order of these matches the encodings. */
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RL78_Reg_X,
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RL78_Reg_A,
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RL78_Reg_C,
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RL78_Reg_B,
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RL78_Reg_E,
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RL78_Reg_D,
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RL78_Reg_L,
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RL78_Reg_H,
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/* The order of these matches the encodings. */
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RL78_Reg_AX,
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RL78_Reg_BC,
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RL78_Reg_DE,
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RL78_Reg_HL,
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/* Unordered. */
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RL78_Reg_SP,
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RL78_Reg_PSW,
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RL78_Reg_CS,
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RL78_Reg_ES,
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RL78_Reg_PMC,
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RL78_Reg_MEM
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} RL78_Register;
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typedef enum
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{
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RL78_Byte = 0,
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RL78_Word
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} RL78_Size;
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typedef enum {
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RL78_Condition_T,
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RL78_Condition_F,
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RL78_Condition_C,
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RL78_Condition_NC,
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RL78_Condition_H,
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RL78_Condition_NH,
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RL78_Condition_Z,
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RL78_Condition_NZ
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} RL78_Condition;
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typedef enum {
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RL78_Operand_None = 0,
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RL78_Operand_Immediate, /* #addend */
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RL78_Operand_Register, /* reg */
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RL78_Operand_Indirect, /* [reg + reg2 + addend] */
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RL78_Operand_Bit, /* reg.bit */
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RL78_Operand_BitIndirect, /* [reg+reg2+addend].bit */
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RL78_Operand_PreDec, /* [--reg] = push */
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RL78_Operand_PostInc /* [reg++] = pop */
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} RL78_Operand_Type;
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typedef enum
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{
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RLO_unknown,
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RLO_add, /* d += s */
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RLO_addc, /* d += s + CY */
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RLO_and, /* d &= s (byte, word, bit) */
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RLO_branch, /* pc = d */
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RLO_branch_cond, /* pc = d if cond(src) */
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RLO_branch_cond_clear, /* pc = d if cond(src), and clear(src) */
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RLO_break, /* BRK */
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RLO_call, /* call */
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RLO_cmp, /* cmp d, s */
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RLO_divhu, /* DIVHU */
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RLO_divwu, /* DIVWU */
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RLO_halt, /* HALT */
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RLO_mov, /* d = s */
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RLO_mach, /* MACH */
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RLO_machu, /* MACHU */
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RLO_mulu, /* MULU */
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RLO_mulh, /* MULH */
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RLO_mulhu, /* MULHU */
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RLO_nop, /* NOP */
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RLO_or, /* d |= s */
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RLO_ret, /* RET */
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RLO_reti, /* RETI */
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RLO_rol, /* d <<= s, MSB to LSB and CY */
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RLO_rolc, /* d <<= s, MSB to CY, CY, to LSB */
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RLO_ror, /* d >>= s, LSB to MSB and CY */
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RLO_rorc, /* d >>= s, LSB to CY, CY, to MSB */
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RLO_sar, /* d >>= s, signed */
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RLO_sel, /* rb = s */
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RLO_shr, /* d >>= s, unsigned */
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RLO_shl, /* d <<= s */
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RLO_skip, /* skip next insn is cond(s) */
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RLO_stop, /* STOP */
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RLO_sub, /* d -= s */
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RLO_subc, /* d -= s - CY */
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RLO_xch, /* swap d, s */
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RLO_xor, /* d ^= s */
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} RL78_Opcode_ID;
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typedef struct {
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RL78_Operand_Type type;
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int addend;
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RL78_Register reg : 8;
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RL78_Register reg2 : 8;
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unsigned char bit_number : 4;
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unsigned char condition : 3;
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unsigned char use_es : 1;
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} RL78_Opcode_Operand;
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/* PSW flag bits */
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#define RL78_PSW_IE 0x80
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#define RL78_PSW_Z 0x40
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#define RL78_PSW_RBS1 0x20
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#define RL78_PSW_AC 0x10
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#define RL78_PSW_RBS0 0x08
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#define RL78_PSW_ISP1 0x04
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#define RL78_PSW_ISP0 0x02
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#define RL78_PSW_CY 0x01
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#define RL78_SFR_SP 0xffff8
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#define RL78_SFR_PSW 0xffffa
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#define RL78_SFR_CS 0xffffc
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#define RL78_SFR_ES 0xffffd
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#define RL78_SFR_PMC 0xffffe
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#define RL78_SFR_MEM 0xfffff
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typedef struct
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{
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int lineno;
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RL78_Opcode_ID id:24;
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unsigned flags:8; /* PSW mask, for side effects only */
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int n_bytes;
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char * syntax;
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RL78_Size size;
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/* By convention, these are destination, source. */
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RL78_Opcode_Operand op[2];
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} RL78_Opcode_Decoded;
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int rl78_decode_opcode (unsigned long, RL78_Opcode_Decoded *, int (*)(void *), void *);
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#endif
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