| 1 | /* Disassemble D30V instructions. |
| 2 | Copyright 1997, 1998, 2000, 2001 Free Software Foundation, Inc. |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | #include "sysdep.h" |
| 20 | #include "opcode/d30v.h" |
| 21 | #include "dis-asm.h" |
| 22 | #include "opintl.h" |
| 23 | |
| 24 | #define PC_MASK 0xFFFFFFFF |
| 25 | |
| 26 | static int lookup_opcode PARAMS ((struct d30v_insn *insn, long num, int is_long)); |
| 27 | static void print_insn PARAMS ((struct disassemble_info *info, bfd_vma memaddr, long long num, |
| 28 | struct d30v_insn *insn, int is_long, int show_ext)); |
| 29 | static int extract_value PARAMS ((long long num, struct d30v_operand *oper, int is_long)); |
| 30 | |
| 31 | int |
| 32 | print_insn_d30v (memaddr, info) |
| 33 | bfd_vma memaddr; |
| 34 | struct disassemble_info *info; |
| 35 | { |
| 36 | int status, result; |
| 37 | bfd_byte buffer[12]; |
| 38 | unsigned long in1, in2; |
| 39 | struct d30v_insn insn; |
| 40 | long long num; |
| 41 | |
| 42 | insn.form = (struct d30v_format *) NULL; |
| 43 | |
| 44 | info->bytes_per_line = 8; |
| 45 | info->bytes_per_chunk = 4; |
| 46 | info->display_endian = BFD_ENDIAN_BIG; |
| 47 | |
| 48 | status = (*info->read_memory_func) (memaddr, buffer, 4, info); |
| 49 | if (status != 0) |
| 50 | { |
| 51 | (*info->memory_error_func) (status, memaddr, info); |
| 52 | return -1; |
| 53 | } |
| 54 | in1 = bfd_getb32 (buffer); |
| 55 | |
| 56 | status = (*info->read_memory_func) (memaddr + 4, buffer, 4, info); |
| 57 | if (status != 0) |
| 58 | { |
| 59 | info->bytes_per_line = 8; |
| 60 | if (!(result = lookup_opcode (&insn, in1, 0))) |
| 61 | (*info->fprintf_func) (info->stream, ".long\t0x%x", in1); |
| 62 | else |
| 63 | print_insn (info, memaddr, (long long) in1, &insn, 0, result); |
| 64 | return 4; |
| 65 | } |
| 66 | in2 = bfd_getb32 (buffer); |
| 67 | |
| 68 | if (in1 & in2 & FM01) |
| 69 | { |
| 70 | /* LONG instruction. */ |
| 71 | if (!(result = lookup_opcode (&insn, in1, 1))) |
| 72 | { |
| 73 | (*info->fprintf_func) (info->stream, ".long\t0x%x,0x%x", in1, in2); |
| 74 | return 8; |
| 75 | } |
| 76 | num = (long long) in1 << 32 | in2; |
| 77 | print_insn (info, memaddr, num, &insn, 1, result); |
| 78 | } |
| 79 | else |
| 80 | { |
| 81 | num = in1; |
| 82 | if (!(result = lookup_opcode (&insn, in1, 0))) |
| 83 | (*info->fprintf_func) (info->stream, ".long\t0x%x", in1); |
| 84 | else |
| 85 | print_insn (info, memaddr, num, &insn, 0, result); |
| 86 | |
| 87 | switch (((in1 >> 31) << 1) | (in2 >> 31)) |
| 88 | { |
| 89 | case 0: |
| 90 | (*info->fprintf_func) (info->stream, "\t||\t"); |
| 91 | break; |
| 92 | case 1: |
| 93 | (*info->fprintf_func) (info->stream, "\t->\t"); |
| 94 | break; |
| 95 | case 2: |
| 96 | (*info->fprintf_func) (info->stream, "\t<-\t"); |
| 97 | default: |
| 98 | break; |
| 99 | } |
| 100 | |
| 101 | insn.form = (struct d30v_format *) NULL; |
| 102 | num = in2; |
| 103 | if (!(result = lookup_opcode (&insn, in2, 0))) |
| 104 | (*info->fprintf_func) (info->stream, ".long\t0x%x", in2); |
| 105 | else |
| 106 | print_insn (info, memaddr, num, &insn, 0, result); |
| 107 | } |
| 108 | return 8; |
| 109 | } |
| 110 | |
| 111 | /* Return 0 if lookup fails, |
| 112 | 1 if found and only one form, |
| 113 | 2 if found and there are short and long forms. */ |
| 114 | |
| 115 | static int |
| 116 | lookup_opcode (insn, num, is_long) |
| 117 | struct d30v_insn *insn; |
| 118 | long num; |
| 119 | int is_long; |
| 120 | { |
| 121 | int i = 0, index; |
| 122 | struct d30v_format *f; |
| 123 | struct d30v_opcode *op = (struct d30v_opcode *) d30v_opcode_table; |
| 124 | int op1 = (num >> 25) & 0x7; |
| 125 | int op2 = (num >> 20) & 0x1f; |
| 126 | int mod = (num >> 18) & 0x3; |
| 127 | |
| 128 | /* Find the opcode. */ |
| 129 | do |
| 130 | { |
| 131 | if ((op->op1 == op1) && (op->op2 == op2)) |
| 132 | break; |
| 133 | op++; |
| 134 | } |
| 135 | while (op->name); |
| 136 | |
| 137 | if (!op || !op->name) |
| 138 | return 0; |
| 139 | |
| 140 | while (op->op1 == op1 && op->op2 == op2) |
| 141 | { |
| 142 | /* Scan through all the formats for the opcode. */ |
| 143 | index = op->format[i++]; |
| 144 | do |
| 145 | { |
| 146 | f = (struct d30v_format *) &d30v_format_table[index]; |
| 147 | while (f->form == index) |
| 148 | { |
| 149 | if ((!is_long || f->form >= LONG) && (f->modifier == mod)) |
| 150 | { |
| 151 | insn->form = f; |
| 152 | break; |
| 153 | } |
| 154 | f++; |
| 155 | } |
| 156 | if (insn->form) |
| 157 | break; |
| 158 | } |
| 159 | while ((index = op->format[i++]) != 0); |
| 160 | if (insn->form) |
| 161 | break; |
| 162 | op++; |
| 163 | i = 0; |
| 164 | } |
| 165 | if (insn->form == NULL) |
| 166 | return 0; |
| 167 | |
| 168 | insn->op = op; |
| 169 | insn->ecc = (num >> 28) & 0x7; |
| 170 | if (op->format[1]) |
| 171 | return 2; |
| 172 | else |
| 173 | return 1; |
| 174 | } |
| 175 | |
| 176 | static void |
| 177 | print_insn (info, memaddr, num, insn, is_long, show_ext) |
| 178 | struct disassemble_info *info; |
| 179 | bfd_vma memaddr; |
| 180 | long long num; |
| 181 | struct d30v_insn *insn; |
| 182 | int is_long; |
| 183 | int show_ext; |
| 184 | { |
| 185 | int val, opnum, need_comma = 0; |
| 186 | struct d30v_operand *oper; |
| 187 | int i, match, opind = 0, need_paren = 0, found_control = 0; |
| 188 | |
| 189 | (*info->fprintf_func) (info->stream, "%s", insn->op->name); |
| 190 | |
| 191 | /* Check for CMP or CMPU. */ |
| 192 | if (d30v_operand_table[insn->form->operands[0]].flags & OPERAND_NAME) |
| 193 | { |
| 194 | opind++; |
| 195 | val = |
| 196 | extract_value (num, |
| 197 | (struct d30v_operand *) &d30v_operand_table[insn->form->operands[0]], |
| 198 | is_long); |
| 199 | (*info->fprintf_func) (info->stream, "%s", d30v_cc_names[val]); |
| 200 | } |
| 201 | |
| 202 | /* Add in ".s" or ".l". */ |
| 203 | if (show_ext == 2) |
| 204 | { |
| 205 | if (is_long) |
| 206 | (*info->fprintf_func) (info->stream, ".l"); |
| 207 | else |
| 208 | (*info->fprintf_func) (info->stream, ".s"); |
| 209 | } |
| 210 | |
| 211 | if (insn->ecc) |
| 212 | (*info->fprintf_func) (info->stream, "/%s", d30v_ecc_names[insn->ecc]); |
| 213 | |
| 214 | (*info->fprintf_func) (info->stream, "\t"); |
| 215 | |
| 216 | while ((opnum = insn->form->operands[opind++]) != 0) |
| 217 | { |
| 218 | int bits; |
| 219 | oper = (struct d30v_operand *) &d30v_operand_table[opnum]; |
| 220 | bits = oper->bits; |
| 221 | if (oper->flags & OPERAND_SHIFT) |
| 222 | bits += 3; |
| 223 | |
| 224 | if (need_comma |
| 225 | && oper->flags != OPERAND_PLUS |
| 226 | && oper->flags != OPERAND_MINUS) |
| 227 | { |
| 228 | need_comma = 0; |
| 229 | (*info->fprintf_func) (info->stream, ", "); |
| 230 | } |
| 231 | |
| 232 | if (oper->flags == OPERAND_ATMINUS) |
| 233 | { |
| 234 | (*info->fprintf_func) (info->stream, "@-"); |
| 235 | continue; |
| 236 | } |
| 237 | if (oper->flags == OPERAND_MINUS) |
| 238 | { |
| 239 | (*info->fprintf_func) (info->stream, "-"); |
| 240 | continue; |
| 241 | } |
| 242 | if (oper->flags == OPERAND_PLUS) |
| 243 | { |
| 244 | (*info->fprintf_func) (info->stream, "+"); |
| 245 | continue; |
| 246 | } |
| 247 | if (oper->flags == OPERAND_ATSIGN) |
| 248 | { |
| 249 | (*info->fprintf_func) (info->stream, "@"); |
| 250 | continue; |
| 251 | } |
| 252 | if (oper->flags == OPERAND_ATPAR) |
| 253 | { |
| 254 | (*info->fprintf_func) (info->stream, "@("); |
| 255 | need_paren = 1; |
| 256 | continue; |
| 257 | } |
| 258 | |
| 259 | if (oper->flags == OPERAND_SPECIAL) |
| 260 | continue; |
| 261 | |
| 262 | val = extract_value (num, oper, is_long); |
| 263 | |
| 264 | if (oper->flags & OPERAND_REG) |
| 265 | { |
| 266 | match = 0; |
| 267 | if (oper->flags & OPERAND_CONTROL) |
| 268 | { |
| 269 | struct d30v_operand *oper3 = |
| 270 | (struct d30v_operand *) &d30v_operand_table[insn->form->operands[2]]; |
| 271 | int id = extract_value (num, oper3, is_long); |
| 272 | found_control = 1; |
| 273 | switch (id) |
| 274 | { |
| 275 | case 0: |
| 276 | val |= OPERAND_CONTROL; |
| 277 | break; |
| 278 | case 1: |
| 279 | case 2: |
| 280 | val = OPERAND_CONTROL + MAX_CONTROL_REG + id; |
| 281 | break; |
| 282 | case 3: |
| 283 | val |= OPERAND_FLAG; |
| 284 | break; |
| 285 | default: |
| 286 | fprintf (stderr, "illegal id (%d)\n", id); |
| 287 | } |
| 288 | } |
| 289 | else if (oper->flags & OPERAND_ACC) |
| 290 | val |= OPERAND_ACC; |
| 291 | else if (oper->flags & OPERAND_FLAG) |
| 292 | val |= OPERAND_FLAG; |
| 293 | for (i = 0; i < reg_name_cnt (); i++) |
| 294 | { |
| 295 | if (val == pre_defined_registers[i].value) |
| 296 | { |
| 297 | if (pre_defined_registers[i].pname) |
| 298 | (*info->fprintf_func) |
| 299 | (info->stream, "%s", pre_defined_registers[i].pname); |
| 300 | else |
| 301 | (*info->fprintf_func) |
| 302 | (info->stream, "%s", pre_defined_registers[i].name); |
| 303 | match = 1; |
| 304 | break; |
| 305 | } |
| 306 | } |
| 307 | if (match == 0) |
| 308 | { |
| 309 | /* This would only get executed if a register was not in |
| 310 | the register table. */ |
| 311 | (*info->fprintf_func) |
| 312 | (info->stream, _("<unknown register %d>"), val & 0x3F); |
| 313 | } |
| 314 | } |
| 315 | /* repeati has a relocation, but its first argument is a plain |
| 316 | immediate. OTOH instructions like djsri have a pc-relative |
| 317 | delay target, but an absolute jump target. Therefore, a test |
| 318 | of insn->op->reloc_flag is not specific enough; we must test |
| 319 | if the actual operand we are handling now is pc-relative. */ |
| 320 | else if (oper->flags & OPERAND_PCREL) |
| 321 | { |
| 322 | int neg = 0; |
| 323 | |
| 324 | /* IMM6S3 is unsigned. */ |
| 325 | if (oper->flags & OPERAND_SIGNED || bits == 32) |
| 326 | { |
| 327 | long max; |
| 328 | max = (1 << (bits - 1)); |
| 329 | if (val & max) |
| 330 | { |
| 331 | if (bits == 32) |
| 332 | val = -val; |
| 333 | else |
| 334 | val = -val & ((1 << bits) - 1); |
| 335 | neg = 1; |
| 336 | } |
| 337 | } |
| 338 | if (neg) |
| 339 | { |
| 340 | (*info->fprintf_func) (info->stream, "-%x\t(", val); |
| 341 | (*info->print_address_func) ((memaddr - val) & PC_MASK, info); |
| 342 | (*info->fprintf_func) (info->stream, ")"); |
| 343 | } |
| 344 | else |
| 345 | { |
| 346 | (*info->fprintf_func) (info->stream, "%x\t(", val); |
| 347 | (*info->print_address_func) ((memaddr + val) & PC_MASK, info); |
| 348 | (*info->fprintf_func) (info->stream, ")"); |
| 349 | } |
| 350 | } |
| 351 | else if (insn->op->reloc_flag == RELOC_ABS) |
| 352 | { |
| 353 | (*info->print_address_func) (val, info); |
| 354 | } |
| 355 | else |
| 356 | { |
| 357 | if (oper->flags & OPERAND_SIGNED) |
| 358 | { |
| 359 | int max = (1 << (bits - 1)); |
| 360 | if (val & max) |
| 361 | { |
| 362 | val = -val; |
| 363 | if (bits < 32) |
| 364 | val &= ((1 << bits) - 1); |
| 365 | (*info->fprintf_func) (info->stream, "-"); |
| 366 | } |
| 367 | } |
| 368 | (*info->fprintf_func) (info->stream, "0x%x", val); |
| 369 | } |
| 370 | /* If there is another operand, then write a comma and space. */ |
| 371 | if (insn->form->operands[opind] && !(found_control && opind == 2)) |
| 372 | need_comma = 1; |
| 373 | } |
| 374 | if (need_paren) |
| 375 | (*info->fprintf_func) (info->stream, ")"); |
| 376 | } |
| 377 | |
| 378 | static int |
| 379 | extract_value (num, oper, is_long) |
| 380 | long long num; |
| 381 | struct d30v_operand *oper; |
| 382 | int is_long; |
| 383 | { |
| 384 | int val; |
| 385 | int shift = 12 - oper->position; |
| 386 | int mask = (0xFFFFFFFF >> (32 - oper->bits)); |
| 387 | |
| 388 | if (is_long) |
| 389 | { |
| 390 | if (oper->bits == 32) |
| 391 | { |
| 392 | /* Piece together 32-bit constant. */ |
| 393 | val = ((num & 0x3FFFF) |
| 394 | | ((num & 0xFF00000) >> 2) |
| 395 | | ((num & 0x3F00000000LL) >> 6)); |
| 396 | } |
| 397 | else |
| 398 | val = (num >> (32 + shift)) & mask; |
| 399 | } |
| 400 | else |
| 401 | val = (num >> shift) & mask; |
| 402 | |
| 403 | if (oper->flags & OPERAND_SHIFT) |
| 404 | val <<= 3; |
| 405 | |
| 406 | return val; |
| 407 | } |