1 /* Opcode decoder for the Renesas RL78 2 Copyright (C) 2011-2014 Free Software Foundation, Inc. 3 Written by DJ Delorie <dj@redhat.com> 4 5 This file is part of GDB, the GNU Debugger and GAS, the GNU Assembler. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 /* The RL78 decoder in libopcodes is used by the simulator, gdb's 23 analyzer, and the disassembler. Given an opcode data source, it 24 decodes the next opcode into the following structures. */ 25 26 #ifndef RL78_OPCODES_H_INCLUDED 27 #define RL78_OPCODES_H_INCLUDED 28 29 /* For the purposes of these structures, the RL78 registers are as 30 follows, despite most of these being memory-mapped and 31 bank-switched: */ 32 typedef enum { 33 RL78_Reg_None, 34 /* The order of these matches the encodings. */ 35 RL78_Reg_X, 36 RL78_Reg_A, 37 RL78_Reg_C, 38 RL78_Reg_B, 39 RL78_Reg_E, 40 RL78_Reg_D, 41 RL78_Reg_L, 42 RL78_Reg_H, 43 /* The order of these matches the encodings. */ 44 RL78_Reg_AX, 45 RL78_Reg_BC, 46 RL78_Reg_DE, 47 RL78_Reg_HL, 48 /* Unordered. */ 49 RL78_Reg_SP, 50 RL78_Reg_PSW, 51 RL78_Reg_CS, 52 RL78_Reg_ES, 53 RL78_Reg_PMC, 54 RL78_Reg_MEM 55 } RL78_Register; 56 57 typedef enum 58 { 59 RL78_Byte = 0, 60 RL78_Word 61 } RL78_Size; 62 63 typedef enum { 64 RL78_Condition_T, 65 RL78_Condition_F, 66 RL78_Condition_C, 67 RL78_Condition_NC, 68 RL78_Condition_H, 69 RL78_Condition_NH, 70 RL78_Condition_Z, 71 RL78_Condition_NZ 72 } RL78_Condition; 73 74 typedef enum { 75 RL78_Operand_None = 0, 76 RL78_Operand_Immediate, /* #addend */ 77 RL78_Operand_Register, /* reg */ 78 RL78_Operand_Indirect, /* [reg + reg2 + addend] */ 79 RL78_Operand_Bit, /* reg.bit */ 80 RL78_Operand_BitIndirect, /* [reg+reg2+addend].bit */ 81 RL78_Operand_PreDec, /* [--reg] = push */ 82 RL78_Operand_PostInc /* [reg++] = pop */ 83 } RL78_Operand_Type; 84 85 typedef enum 86 { 87 RLO_unknown, 88 RLO_add, /* d += s */ 89 RLO_addc, /* d += s + CY */ 90 RLO_and, /* d &= s (byte, word, bit) */ 91 RLO_branch, /* pc = d */ 92 RLO_branch_cond, /* pc = d if cond(src) */ 93 RLO_branch_cond_clear, /* pc = d if cond(src), and clear(src) */ 94 RLO_break, /* BRK */ 95 RLO_call, /* call */ 96 RLO_cmp, /* cmp d, s */ 97 RLO_divhu, /* DIVHU */ 98 RLO_divwu, /* DIVWU */ 99 RLO_halt, /* HALT */ 100 RLO_mov, /* d = s */ 101 RLO_mach, /* MACH */ 102 RLO_machu, /* MACHU */ 103 RLO_mulu, /* MULU */ 104 RLO_mulh, /* MULH */ 105 RLO_mulhu, /* MULHU */ 106 RLO_nop, /* NOP */ 107 RLO_or, /* d |= s */ 108 RLO_ret, /* RET */ 109 RLO_reti, /* RETI */ 110 RLO_rol, /* d <<= s, MSB to LSB and CY */ 111 RLO_rolc, /* d <<= s, MSB to CY, CY, to LSB */ 112 RLO_ror, /* d >>= s, LSB to MSB and CY */ 113 RLO_rorc, /* d >>= s, LSB to CY, CY, to MSB */ 114 RLO_sar, /* d >>= s, signed */ 115 RLO_sel, /* rb = s */ 116 RLO_shr, /* d >>= s, unsigned */ 117 RLO_shl, /* d <<= s */ 118 RLO_skip, /* skip next insn is cond(s) */ 119 RLO_stop, /* STOP */ 120 RLO_sub, /* d -= s */ 121 RLO_subc, /* d -= s - CY */ 122 RLO_xch, /* swap d, s */ 123 RLO_xor, /* d ^= s */ 124 } RL78_Opcode_ID; 125 126 typedef struct { 127 RL78_Operand_Type type; 128 int addend; 129 RL78_Register reg : 8; 130 RL78_Register reg2 : 8; 131 unsigned char bit_number : 4; 132 unsigned char condition : 3; 133 unsigned char use_es : 1; 134 } RL78_Opcode_Operand; 135 136 /* PSW flag bits */ 137 #define RL78_PSW_IE 0x80 138 #define RL78_PSW_Z 0x40 139 #define RL78_PSW_RBS1 0x20 140 #define RL78_PSW_AC 0x10 141 #define RL78_PSW_RBS0 0x08 142 #define RL78_PSW_ISP1 0x04 143 #define RL78_PSW_ISP0 0x02 144 #define RL78_PSW_CY 0x01 145 146 #define RL78_SFR_SP 0xffff8 147 #define RL78_SFR_PSW 0xffffa 148 #define RL78_SFR_CS 0xffffc 149 #define RL78_SFR_ES 0xffffd 150 #define RL78_SFR_PMC 0xffffe 151 #define RL78_SFR_MEM 0xfffff 152 153 typedef struct 154 { 155 int lineno; 156 RL78_Opcode_ID id:24; 157 unsigned flags:8; /* PSW mask, for side effects only */ 158 int n_bytes; 159 char * syntax; 160 RL78_Size size; 161 /* By convention, these are destination, source. */ 162 RL78_Opcode_Operand op[2]; 163 } RL78_Opcode_Decoded; 164 165 int rl78_decode_opcode (unsigned long, RL78_Opcode_Decoded *, int (*)(void *), void *); 166 167 #endif 168