1 /* Opcode decoder for the Renesas RX 2 Copyright (C) 2008-2016 Free Software Foundation, Inc. 3 Written by DJ Delorie <dj (at) 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 RX decoder in libopcodes is used by the simulator, gdb's 23 analyzer, and the disassembler. Given an opcode data source, 24 it decodes the next opcode into the following structures. */ 25 26 #ifdef __cplusplus 27 extern "C" { 28 #endif 29 30 typedef enum 31 { 32 RX_AnySize = 0, 33 RX_Byte, /* undefined extension */ 34 RX_UByte, 35 RX_SByte, 36 RX_Word, /* undefined extension */ 37 RX_UWord, 38 RX_SWord, 39 RX_3Byte, 40 RX_Long, 41 RX_Bad_Size, 42 RX_MAX_SIZE 43 } RX_Size; 44 45 typedef enum 46 { 47 RX_Operand_None, 48 RX_Operand_Immediate, /* #addend */ 49 RX_Operand_Register, /* Rn */ 50 RX_Operand_Indirect, /* [Rn + addend] */ 51 RX_Operand_Zero_Indirect,/* [Rn] */ 52 RX_Operand_Postinc, /* [Rn+] */ 53 RX_Operand_Predec, /* [-Rn] */ 54 RX_Operand_Condition, /* eq, gtu, etc */ 55 RX_Operand_Flag, /* [UIOSZC] */ 56 RX_Operand_TwoReg, /* [Rn + scale*R2] */ 57 } RX_Operand_Type; 58 59 typedef enum 60 { 61 RXO_unknown, 62 RXO_mov, /* d = s (signed) */ 63 RXO_movbi, /* d = [s,s2] (signed) */ 64 RXO_movbir, /* [s,s2] = d (signed) */ 65 RXO_pushm, /* s..s2 */ 66 RXO_popm, /* s..s2 */ 67 RXO_xchg, /* s <-> d */ 68 RXO_stcc, /* d = s if cond(s2) */ 69 RXO_rtsd, /* rtsd, 1=imm, 2-0 = reg if reg type */ 70 71 /* These are all either d OP= s or, if s2 is set, d = s OP s2. Note 72 that d may be "None". */ 73 RXO_and, 74 RXO_or, 75 RXO_xor, 76 RXO_add, 77 RXO_sub, 78 RXO_mul, 79 RXO_div, 80 RXO_divu, 81 RXO_shll, 82 RXO_shar, 83 RXO_shlr, 84 85 RXO_adc, /* d = d + s + carry */ 86 RXO_sbb, /* d = d - s - ~carry */ 87 RXO_abs, /* d = |s| */ 88 RXO_max, /* d = max(d,s) */ 89 RXO_min, /* d = min(d,s) */ 90 RXO_emul, /* d:64 = d:32 * s */ 91 RXO_emulu, /* d:64 = d:32 * s (unsigned) */ 92 93 RXO_rolc, /* d <<= 1 through carry */ 94 RXO_rorc, /* d >>= 1 through carry*/ 95 RXO_rotl, /* d <<= #s without carry */ 96 RXO_rotr, /* d >>= #s without carry*/ 97 RXO_revw, /* d = revw(s) */ 98 RXO_revl, /* d = revl(s) */ 99 RXO_branch, /* pc = d if cond(s) */ 100 RXO_branchrel,/* pc += d if cond(s) */ 101 RXO_jsr, /* pc = d */ 102 RXO_jsrrel, /* pc += d */ 103 RXO_rts, 104 RXO_nop, 105 RXO_nop2, 106 RXO_nop3, 107 RXO_nop4, 108 RXO_nop5, 109 RXO_nop6, 110 RXO_nop7, 111 112 RXO_scmpu, 113 RXO_smovu, 114 RXO_smovb, 115 RXO_suntil, 116 RXO_swhile, 117 RXO_smovf, 118 RXO_sstr, 119 120 RXO_rmpa, 121 RXO_mulhi, 122 RXO_mullo, 123 RXO_machi, 124 RXO_maclo, 125 RXO_mvtachi, 126 RXO_mvtaclo, 127 RXO_mvfachi, 128 RXO_mvfacmi, 129 RXO_mvfaclo, 130 RXO_racw, 131 132 RXO_sat, /* sat(d) */ 133 RXO_satr, 134 135 RXO_fadd, /* d op= s */ 136 RXO_fcmp, 137 RXO_fsub, 138 RXO_ftoi, 139 RXO_fmul, 140 RXO_fdiv, 141 RXO_round, 142 RXO_itof, 143 144 RXO_bset, /* d |= (1<<s) */ 145 RXO_bclr, /* d &= ~(1<<s) */ 146 RXO_btst, /* s & (1<<s2) */ 147 RXO_bnot, /* d ^= (1<<s) */ 148 RXO_bmcc, /* d<s> = cond(s2) */ 149 150 RXO_clrpsw, /* flag index in d */ 151 RXO_setpsw, /* flag index in d */ 152 RXO_mvtipl, /* new IPL in s */ 153 154 RXO_rtfi, 155 RXO_rte, 156 RXO_rtd, /* undocumented */ 157 RXO_brk, 158 RXO_dbt, /* undocumented */ 159 RXO_int, /* vector id in s */ 160 RXO_stop, 161 RXO_wait, 162 163 RXO_sccnd, /* d = cond(s) ? 1 : 0 */ 164 165 RXO_fsqrt, 166 RXO_ftou, 167 RXO_utof, 168 RXO_movco, 169 RXO_movli, 170 RXO_emaca, 171 RXO_emsba, 172 RXO_emula, 173 RXO_maclh, 174 RXO_msbhi, 175 RXO_msblh, 176 RXO_msblo, 177 RXO_mullh, 178 RXO_mvfacgu, 179 RXO_mvtacgu, 180 RXO_racl, 181 RXO_rdacl, 182 RXO_rdacw, 183 } RX_Opcode_ID; 184 185 /* Condition bitpatterns, as registers. */ 186 #define RXC_eq 0 187 #define RXC_z 0 188 #define RXC_ne 1 189 #define RXC_nz 1 190 #define RXC_c 2 191 #define RXC_nc 3 192 #define RXC_gtu 4 193 #define RXC_leu 5 194 #define RXC_pz 6 195 #define RXC_n 7 196 #define RXC_ge 8 197 #define RXC_lt 9 198 #define RXC_gt 10 199 #define RXC_le 11 200 #define RXC_o 12 201 #define RXC_no 13 202 #define RXC_always 14 203 #define RXC_never 15 204 205 typedef struct 206 { 207 RX_Operand_Type type; 208 int reg; 209 int addend; 210 RX_Size size; 211 } RX_Opcode_Operand; 212 213 typedef struct 214 { 215 RX_Opcode_ID id; 216 int n_bytes; 217 int prefix; 218 char * syntax; 219 RX_Size size; 220 /* By convention, these are destination, source1, source2. */ 221 RX_Opcode_Operand op[3]; 222 223 /* The logic here is: 224 newflags = (oldflags & ~(int)flags_0) | flags_1 | (op_flags & flags_s) 225 Only the O, S, Z, and C flags are affected. */ 226 char flags_0; /* This also clears out flags-to-be-set. */ 227 char flags_1; 228 char flags_s; 229 } RX_Opcode_Decoded; 230 231 /* Within the syntax, %c-style format specifiers are as follows: 232 233 %% = '%' character 234 %0 = operand[0] (destination) 235 %1 = operand[1] (source) 236 %2 = operand[2] (2nd source) 237 %s = operation size (b/w/l) 238 %SN = operand size [N] (N=0,1,2) 239 %aN = op[N] as an address (N=0,1,2) 240 241 Register numbers 0..15 are general registers. 16..31 are control 242 registers. 32..47 are condition codes. */ 243 244 int rx_decode_opcode (unsigned long, RX_Opcode_Decoded *, int (*)(void *), void *); 245 246 #ifdef __cplusplus 247 } 248 #endif 249
