Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include <assert.h> |
| 6 | #include <stdarg.h> |
| 7 | #include <stdio.h> |
| 8 | #include <string.h> |
| 9 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 10 | #if V8_TARGET_ARCH_ARM64 |
| 11 | |
| 12 | #include "src/arm64/decoder-arm64-inl.h" |
| 13 | #include "src/arm64/disasm-arm64.h" |
| 14 | #include "src/base/platform/platform.h" |
| 15 | #include "src/disasm.h" |
| 16 | #include "src/macro-assembler.h" |
| 17 | |
| 18 | namespace v8 { |
| 19 | namespace internal { |
| 20 | |
| 21 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 22 | DisassemblingDecoder::DisassemblingDecoder() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 23 | buffer_size_ = 256; |
| 24 | buffer_ = reinterpret_cast<char*>(malloc(buffer_size_)); |
| 25 | buffer_pos_ = 0; |
| 26 | own_buffer_ = true; |
| 27 | } |
| 28 | |
| 29 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 30 | DisassemblingDecoder::DisassemblingDecoder(char* text_buffer, int buffer_size) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 31 | buffer_size_ = buffer_size; |
| 32 | buffer_ = text_buffer; |
| 33 | buffer_pos_ = 0; |
| 34 | own_buffer_ = false; |
| 35 | } |
| 36 | |
| 37 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 38 | DisassemblingDecoder::~DisassemblingDecoder() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 39 | if (own_buffer_) { |
| 40 | free(buffer_); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 45 | char* DisassemblingDecoder::GetOutput() { return buffer_; } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 46 | |
| 47 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 48 | void DisassemblingDecoder::VisitAddSubImmediate(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 49 | bool rd_is_zr = RdIsZROrSP(instr); |
| 50 | bool stack_op = (rd_is_zr || RnIsZROrSP(instr)) && |
| 51 | (instr->ImmAddSub() == 0) ? true : false; |
| 52 | const char *mnemonic = ""; |
| 53 | const char *form = "'Rds, 'Rns, 'IAddSub"; |
| 54 | const char *form_cmp = "'Rns, 'IAddSub"; |
| 55 | const char *form_mov = "'Rds, 'Rns"; |
| 56 | |
| 57 | switch (instr->Mask(AddSubImmediateMask)) { |
| 58 | case ADD_w_imm: |
| 59 | case ADD_x_imm: { |
| 60 | mnemonic = "add"; |
| 61 | if (stack_op) { |
| 62 | mnemonic = "mov"; |
| 63 | form = form_mov; |
| 64 | } |
| 65 | break; |
| 66 | } |
| 67 | case ADDS_w_imm: |
| 68 | case ADDS_x_imm: { |
| 69 | mnemonic = "adds"; |
| 70 | if (rd_is_zr) { |
| 71 | mnemonic = "cmn"; |
| 72 | form = form_cmp; |
| 73 | } |
| 74 | break; |
| 75 | } |
| 76 | case SUB_w_imm: |
| 77 | case SUB_x_imm: mnemonic = "sub"; break; |
| 78 | case SUBS_w_imm: |
| 79 | case SUBS_x_imm: { |
| 80 | mnemonic = "subs"; |
| 81 | if (rd_is_zr) { |
| 82 | mnemonic = "cmp"; |
| 83 | form = form_cmp; |
| 84 | } |
| 85 | break; |
| 86 | } |
| 87 | default: UNREACHABLE(); |
| 88 | } |
| 89 | Format(instr, mnemonic, form); |
| 90 | } |
| 91 | |
| 92 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 93 | void DisassemblingDecoder::VisitAddSubShifted(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 94 | bool rd_is_zr = RdIsZROrSP(instr); |
| 95 | bool rn_is_zr = RnIsZROrSP(instr); |
| 96 | const char *mnemonic = ""; |
| 97 | const char *form = "'Rd, 'Rn, 'Rm'HDP"; |
| 98 | const char *form_cmp = "'Rn, 'Rm'HDP"; |
| 99 | const char *form_neg = "'Rd, 'Rm'HDP"; |
| 100 | |
| 101 | switch (instr->Mask(AddSubShiftedMask)) { |
| 102 | case ADD_w_shift: |
| 103 | case ADD_x_shift: mnemonic = "add"; break; |
| 104 | case ADDS_w_shift: |
| 105 | case ADDS_x_shift: { |
| 106 | mnemonic = "adds"; |
| 107 | if (rd_is_zr) { |
| 108 | mnemonic = "cmn"; |
| 109 | form = form_cmp; |
| 110 | } |
| 111 | break; |
| 112 | } |
| 113 | case SUB_w_shift: |
| 114 | case SUB_x_shift: { |
| 115 | mnemonic = "sub"; |
| 116 | if (rn_is_zr) { |
| 117 | mnemonic = "neg"; |
| 118 | form = form_neg; |
| 119 | } |
| 120 | break; |
| 121 | } |
| 122 | case SUBS_w_shift: |
| 123 | case SUBS_x_shift: { |
| 124 | mnemonic = "subs"; |
| 125 | if (rd_is_zr) { |
| 126 | mnemonic = "cmp"; |
| 127 | form = form_cmp; |
| 128 | } else if (rn_is_zr) { |
| 129 | mnemonic = "negs"; |
| 130 | form = form_neg; |
| 131 | } |
| 132 | break; |
| 133 | } |
| 134 | default: UNREACHABLE(); |
| 135 | } |
| 136 | Format(instr, mnemonic, form); |
| 137 | } |
| 138 | |
| 139 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 140 | void DisassemblingDecoder::VisitAddSubExtended(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 141 | bool rd_is_zr = RdIsZROrSP(instr); |
| 142 | const char *mnemonic = ""; |
| 143 | Extend mode = static_cast<Extend>(instr->ExtendMode()); |
| 144 | const char *form = ((mode == UXTX) || (mode == SXTX)) ? |
| 145 | "'Rds, 'Rns, 'Xm'Ext" : "'Rds, 'Rns, 'Wm'Ext"; |
| 146 | const char *form_cmp = ((mode == UXTX) || (mode == SXTX)) ? |
| 147 | "'Rns, 'Xm'Ext" : "'Rns, 'Wm'Ext"; |
| 148 | |
| 149 | switch (instr->Mask(AddSubExtendedMask)) { |
| 150 | case ADD_w_ext: |
| 151 | case ADD_x_ext: mnemonic = "add"; break; |
| 152 | case ADDS_w_ext: |
| 153 | case ADDS_x_ext: { |
| 154 | mnemonic = "adds"; |
| 155 | if (rd_is_zr) { |
| 156 | mnemonic = "cmn"; |
| 157 | form = form_cmp; |
| 158 | } |
| 159 | break; |
| 160 | } |
| 161 | case SUB_w_ext: |
| 162 | case SUB_x_ext: mnemonic = "sub"; break; |
| 163 | case SUBS_w_ext: |
| 164 | case SUBS_x_ext: { |
| 165 | mnemonic = "subs"; |
| 166 | if (rd_is_zr) { |
| 167 | mnemonic = "cmp"; |
| 168 | form = form_cmp; |
| 169 | } |
| 170 | break; |
| 171 | } |
| 172 | default: UNREACHABLE(); |
| 173 | } |
| 174 | Format(instr, mnemonic, form); |
| 175 | } |
| 176 | |
| 177 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 178 | void DisassemblingDecoder::VisitAddSubWithCarry(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 179 | bool rn_is_zr = RnIsZROrSP(instr); |
| 180 | const char *mnemonic = ""; |
| 181 | const char *form = "'Rd, 'Rn, 'Rm"; |
| 182 | const char *form_neg = "'Rd, 'Rm"; |
| 183 | |
| 184 | switch (instr->Mask(AddSubWithCarryMask)) { |
| 185 | case ADC_w: |
| 186 | case ADC_x: mnemonic = "adc"; break; |
| 187 | case ADCS_w: |
| 188 | case ADCS_x: mnemonic = "adcs"; break; |
| 189 | case SBC_w: |
| 190 | case SBC_x: { |
| 191 | mnemonic = "sbc"; |
| 192 | if (rn_is_zr) { |
| 193 | mnemonic = "ngc"; |
| 194 | form = form_neg; |
| 195 | } |
| 196 | break; |
| 197 | } |
| 198 | case SBCS_w: |
| 199 | case SBCS_x: { |
| 200 | mnemonic = "sbcs"; |
| 201 | if (rn_is_zr) { |
| 202 | mnemonic = "ngcs"; |
| 203 | form = form_neg; |
| 204 | } |
| 205 | break; |
| 206 | } |
| 207 | default: UNREACHABLE(); |
| 208 | } |
| 209 | Format(instr, mnemonic, form); |
| 210 | } |
| 211 | |
| 212 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 213 | void DisassemblingDecoder::VisitLogicalImmediate(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 214 | bool rd_is_zr = RdIsZROrSP(instr); |
| 215 | bool rn_is_zr = RnIsZROrSP(instr); |
| 216 | const char *mnemonic = ""; |
| 217 | const char *form = "'Rds, 'Rn, 'ITri"; |
| 218 | |
| 219 | if (instr->ImmLogical() == 0) { |
| 220 | // The immediate encoded in the instruction is not in the expected format. |
| 221 | Format(instr, "unallocated", "(LogicalImmediate)"); |
| 222 | return; |
| 223 | } |
| 224 | |
| 225 | switch (instr->Mask(LogicalImmediateMask)) { |
| 226 | case AND_w_imm: |
| 227 | case AND_x_imm: mnemonic = "and"; break; |
| 228 | case ORR_w_imm: |
| 229 | case ORR_x_imm: { |
| 230 | mnemonic = "orr"; |
| 231 | unsigned reg_size = (instr->SixtyFourBits() == 1) ? kXRegSizeInBits |
| 232 | : kWRegSizeInBits; |
| 233 | if (rn_is_zr && !IsMovzMovnImm(reg_size, instr->ImmLogical())) { |
| 234 | mnemonic = "mov"; |
| 235 | form = "'Rds, 'ITri"; |
| 236 | } |
| 237 | break; |
| 238 | } |
| 239 | case EOR_w_imm: |
| 240 | case EOR_x_imm: mnemonic = "eor"; break; |
| 241 | case ANDS_w_imm: |
| 242 | case ANDS_x_imm: { |
| 243 | mnemonic = "ands"; |
| 244 | if (rd_is_zr) { |
| 245 | mnemonic = "tst"; |
| 246 | form = "'Rn, 'ITri"; |
| 247 | } |
| 248 | break; |
| 249 | } |
| 250 | default: UNREACHABLE(); |
| 251 | } |
| 252 | Format(instr, mnemonic, form); |
| 253 | } |
| 254 | |
| 255 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 256 | bool DisassemblingDecoder::IsMovzMovnImm(unsigned reg_size, uint64_t value) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 257 | DCHECK((reg_size == kXRegSizeInBits) || |
| 258 | ((reg_size == kWRegSizeInBits) && (value <= 0xffffffff))); |
| 259 | |
| 260 | // Test for movz: 16-bits set at positions 0, 16, 32 or 48. |
| 261 | if (((value & 0xffffffffffff0000UL) == 0UL) || |
| 262 | ((value & 0xffffffff0000ffffUL) == 0UL) || |
| 263 | ((value & 0xffff0000ffffffffUL) == 0UL) || |
| 264 | ((value & 0x0000ffffffffffffUL) == 0UL)) { |
| 265 | return true; |
| 266 | } |
| 267 | |
| 268 | // Test for movn: NOT(16-bits set at positions 0, 16, 32 or 48). |
| 269 | if ((reg_size == kXRegSizeInBits) && |
| 270 | (((value & 0xffffffffffff0000UL) == 0xffffffffffff0000UL) || |
| 271 | ((value & 0xffffffff0000ffffUL) == 0xffffffff0000ffffUL) || |
| 272 | ((value & 0xffff0000ffffffffUL) == 0xffff0000ffffffffUL) || |
| 273 | ((value & 0x0000ffffffffffffUL) == 0x0000ffffffffffffUL))) { |
| 274 | return true; |
| 275 | } |
| 276 | if ((reg_size == kWRegSizeInBits) && |
| 277 | (((value & 0xffff0000) == 0xffff0000) || |
| 278 | ((value & 0x0000ffff) == 0x0000ffff))) { |
| 279 | return true; |
| 280 | } |
| 281 | return false; |
| 282 | } |
| 283 | |
| 284 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 285 | void DisassemblingDecoder::VisitLogicalShifted(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 286 | bool rd_is_zr = RdIsZROrSP(instr); |
| 287 | bool rn_is_zr = RnIsZROrSP(instr); |
| 288 | const char *mnemonic = ""; |
| 289 | const char *form = "'Rd, 'Rn, 'Rm'HLo"; |
| 290 | |
| 291 | switch (instr->Mask(LogicalShiftedMask)) { |
| 292 | case AND_w: |
| 293 | case AND_x: mnemonic = "and"; break; |
| 294 | case BIC_w: |
| 295 | case BIC_x: mnemonic = "bic"; break; |
| 296 | case EOR_w: |
| 297 | case EOR_x: mnemonic = "eor"; break; |
| 298 | case EON_w: |
| 299 | case EON_x: mnemonic = "eon"; break; |
| 300 | case BICS_w: |
| 301 | case BICS_x: mnemonic = "bics"; break; |
| 302 | case ANDS_w: |
| 303 | case ANDS_x: { |
| 304 | mnemonic = "ands"; |
| 305 | if (rd_is_zr) { |
| 306 | mnemonic = "tst"; |
| 307 | form = "'Rn, 'Rm'HLo"; |
| 308 | } |
| 309 | break; |
| 310 | } |
| 311 | case ORR_w: |
| 312 | case ORR_x: { |
| 313 | mnemonic = "orr"; |
| 314 | if (rn_is_zr && (instr->ImmDPShift() == 0) && (instr->ShiftDP() == LSL)) { |
| 315 | mnemonic = "mov"; |
| 316 | form = "'Rd, 'Rm"; |
| 317 | } |
| 318 | break; |
| 319 | } |
| 320 | case ORN_w: |
| 321 | case ORN_x: { |
| 322 | mnemonic = "orn"; |
| 323 | if (rn_is_zr) { |
| 324 | mnemonic = "mvn"; |
| 325 | form = "'Rd, 'Rm'HLo"; |
| 326 | } |
| 327 | break; |
| 328 | } |
| 329 | default: UNREACHABLE(); |
| 330 | } |
| 331 | |
| 332 | Format(instr, mnemonic, form); |
| 333 | } |
| 334 | |
| 335 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 336 | void DisassemblingDecoder::VisitConditionalCompareRegister(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 337 | const char *mnemonic = ""; |
| 338 | const char *form = "'Rn, 'Rm, 'INzcv, 'Cond"; |
| 339 | |
| 340 | switch (instr->Mask(ConditionalCompareRegisterMask)) { |
| 341 | case CCMN_w: |
| 342 | case CCMN_x: mnemonic = "ccmn"; break; |
| 343 | case CCMP_w: |
| 344 | case CCMP_x: mnemonic = "ccmp"; break; |
| 345 | default: UNREACHABLE(); |
| 346 | } |
| 347 | Format(instr, mnemonic, form); |
| 348 | } |
| 349 | |
| 350 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 351 | void DisassemblingDecoder::VisitConditionalCompareImmediate( |
| 352 | Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 353 | const char *mnemonic = ""; |
| 354 | const char *form = "'Rn, 'IP, 'INzcv, 'Cond"; |
| 355 | |
| 356 | switch (instr->Mask(ConditionalCompareImmediateMask)) { |
| 357 | case CCMN_w_imm: |
| 358 | case CCMN_x_imm: mnemonic = "ccmn"; break; |
| 359 | case CCMP_w_imm: |
| 360 | case CCMP_x_imm: mnemonic = "ccmp"; break; |
| 361 | default: UNREACHABLE(); |
| 362 | } |
| 363 | Format(instr, mnemonic, form); |
| 364 | } |
| 365 | |
| 366 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 367 | void DisassemblingDecoder::VisitConditionalSelect(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 368 | bool rnm_is_zr = (RnIsZROrSP(instr) && RmIsZROrSP(instr)); |
| 369 | bool rn_is_rm = (instr->Rn() == instr->Rm()); |
| 370 | const char *mnemonic = ""; |
| 371 | const char *form = "'Rd, 'Rn, 'Rm, 'Cond"; |
| 372 | const char *form_test = "'Rd, 'CInv"; |
| 373 | const char *form_update = "'Rd, 'Rn, 'CInv"; |
| 374 | |
| 375 | Condition cond = static_cast<Condition>(instr->Condition()); |
| 376 | bool invertible_cond = (cond != al) && (cond != nv); |
| 377 | |
| 378 | switch (instr->Mask(ConditionalSelectMask)) { |
| 379 | case CSEL_w: |
| 380 | case CSEL_x: mnemonic = "csel"; break; |
| 381 | case CSINC_w: |
| 382 | case CSINC_x: { |
| 383 | mnemonic = "csinc"; |
| 384 | if (rnm_is_zr && invertible_cond) { |
| 385 | mnemonic = "cset"; |
| 386 | form = form_test; |
| 387 | } else if (rn_is_rm && invertible_cond) { |
| 388 | mnemonic = "cinc"; |
| 389 | form = form_update; |
| 390 | } |
| 391 | break; |
| 392 | } |
| 393 | case CSINV_w: |
| 394 | case CSINV_x: { |
| 395 | mnemonic = "csinv"; |
| 396 | if (rnm_is_zr && invertible_cond) { |
| 397 | mnemonic = "csetm"; |
| 398 | form = form_test; |
| 399 | } else if (rn_is_rm && invertible_cond) { |
| 400 | mnemonic = "cinv"; |
| 401 | form = form_update; |
| 402 | } |
| 403 | break; |
| 404 | } |
| 405 | case CSNEG_w: |
| 406 | case CSNEG_x: { |
| 407 | mnemonic = "csneg"; |
| 408 | if (rn_is_rm && invertible_cond) { |
| 409 | mnemonic = "cneg"; |
| 410 | form = form_update; |
| 411 | } |
| 412 | break; |
| 413 | } |
| 414 | default: UNREACHABLE(); |
| 415 | } |
| 416 | Format(instr, mnemonic, form); |
| 417 | } |
| 418 | |
| 419 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 420 | void DisassemblingDecoder::VisitBitfield(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 421 | unsigned s = instr->ImmS(); |
| 422 | unsigned r = instr->ImmR(); |
| 423 | unsigned rd_size_minus_1 = |
| 424 | ((instr->SixtyFourBits() == 1) ? kXRegSizeInBits : kWRegSizeInBits) - 1; |
| 425 | const char *mnemonic = ""; |
| 426 | const char *form = ""; |
| 427 | const char *form_shift_right = "'Rd, 'Rn, 'IBr"; |
| 428 | const char *form_extend = "'Rd, 'Wn"; |
| 429 | const char *form_bfiz = "'Rd, 'Rn, 'IBZ-r, 'IBs+1"; |
| 430 | const char *form_bfx = "'Rd, 'Rn, 'IBr, 'IBs-r+1"; |
| 431 | const char *form_lsl = "'Rd, 'Rn, 'IBZ-r"; |
| 432 | |
| 433 | switch (instr->Mask(BitfieldMask)) { |
| 434 | case SBFM_w: |
| 435 | case SBFM_x: { |
| 436 | mnemonic = "sbfx"; |
| 437 | form = form_bfx; |
| 438 | if (r == 0) { |
| 439 | form = form_extend; |
| 440 | if (s == 7) { |
| 441 | mnemonic = "sxtb"; |
| 442 | } else if (s == 15) { |
| 443 | mnemonic = "sxth"; |
| 444 | } else if ((s == 31) && (instr->SixtyFourBits() == 1)) { |
| 445 | mnemonic = "sxtw"; |
| 446 | } else { |
| 447 | form = form_bfx; |
| 448 | } |
| 449 | } else if (s == rd_size_minus_1) { |
| 450 | mnemonic = "asr"; |
| 451 | form = form_shift_right; |
| 452 | } else if (s < r) { |
| 453 | mnemonic = "sbfiz"; |
| 454 | form = form_bfiz; |
| 455 | } |
| 456 | break; |
| 457 | } |
| 458 | case UBFM_w: |
| 459 | case UBFM_x: { |
| 460 | mnemonic = "ubfx"; |
| 461 | form = form_bfx; |
| 462 | if (r == 0) { |
| 463 | form = form_extend; |
| 464 | if (s == 7) { |
| 465 | mnemonic = "uxtb"; |
| 466 | } else if (s == 15) { |
| 467 | mnemonic = "uxth"; |
| 468 | } else { |
| 469 | form = form_bfx; |
| 470 | } |
| 471 | } |
| 472 | if (s == rd_size_minus_1) { |
| 473 | mnemonic = "lsr"; |
| 474 | form = form_shift_right; |
| 475 | } else if (r == s + 1) { |
| 476 | mnemonic = "lsl"; |
| 477 | form = form_lsl; |
| 478 | } else if (s < r) { |
| 479 | mnemonic = "ubfiz"; |
| 480 | form = form_bfiz; |
| 481 | } |
| 482 | break; |
| 483 | } |
| 484 | case BFM_w: |
| 485 | case BFM_x: { |
| 486 | mnemonic = "bfxil"; |
| 487 | form = form_bfx; |
| 488 | if (s < r) { |
| 489 | mnemonic = "bfi"; |
| 490 | form = form_bfiz; |
| 491 | } |
| 492 | } |
| 493 | } |
| 494 | Format(instr, mnemonic, form); |
| 495 | } |
| 496 | |
| 497 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 498 | void DisassemblingDecoder::VisitExtract(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 499 | const char *mnemonic = ""; |
| 500 | const char *form = "'Rd, 'Rn, 'Rm, 'IExtract"; |
| 501 | |
| 502 | switch (instr->Mask(ExtractMask)) { |
| 503 | case EXTR_w: |
| 504 | case EXTR_x: { |
| 505 | if (instr->Rn() == instr->Rm()) { |
| 506 | mnemonic = "ror"; |
| 507 | form = "'Rd, 'Rn, 'IExtract"; |
| 508 | } else { |
| 509 | mnemonic = "extr"; |
| 510 | } |
| 511 | break; |
| 512 | } |
| 513 | default: UNREACHABLE(); |
| 514 | } |
| 515 | Format(instr, mnemonic, form); |
| 516 | } |
| 517 | |
| 518 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 519 | void DisassemblingDecoder::VisitPCRelAddressing(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 520 | switch (instr->Mask(PCRelAddressingMask)) { |
| 521 | case ADR: Format(instr, "adr", "'Xd, 'AddrPCRelByte"); break; |
| 522 | // ADRP is not implemented. |
| 523 | default: Format(instr, "unimplemented", "(PCRelAddressing)"); |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 528 | void DisassemblingDecoder::VisitConditionalBranch(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 529 | switch (instr->Mask(ConditionalBranchMask)) { |
| 530 | case B_cond: Format(instr, "b.'CBrn", "'BImmCond"); break; |
| 531 | default: UNREACHABLE(); |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 536 | void DisassemblingDecoder::VisitUnconditionalBranchToRegister( |
| 537 | Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 538 | const char *mnemonic = "unimplemented"; |
| 539 | const char *form = "'Xn"; |
| 540 | |
| 541 | switch (instr->Mask(UnconditionalBranchToRegisterMask)) { |
| 542 | case BR: mnemonic = "br"; break; |
| 543 | case BLR: mnemonic = "blr"; break; |
| 544 | case RET: { |
| 545 | mnemonic = "ret"; |
| 546 | if (instr->Rn() == kLinkRegCode) { |
| 547 | form = NULL; |
| 548 | } |
| 549 | break; |
| 550 | } |
| 551 | default: form = "(UnconditionalBranchToRegister)"; |
| 552 | } |
| 553 | Format(instr, mnemonic, form); |
| 554 | } |
| 555 | |
| 556 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 557 | void DisassemblingDecoder::VisitUnconditionalBranch(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 558 | const char *mnemonic = ""; |
| 559 | const char *form = "'BImmUncn"; |
| 560 | |
| 561 | switch (instr->Mask(UnconditionalBranchMask)) { |
| 562 | case B: mnemonic = "b"; break; |
| 563 | case BL: mnemonic = "bl"; break; |
| 564 | default: UNREACHABLE(); |
| 565 | } |
| 566 | Format(instr, mnemonic, form); |
| 567 | } |
| 568 | |
| 569 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 570 | void DisassemblingDecoder::VisitDataProcessing1Source(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 571 | const char *mnemonic = ""; |
| 572 | const char *form = "'Rd, 'Rn"; |
| 573 | |
| 574 | switch (instr->Mask(DataProcessing1SourceMask)) { |
| 575 | #define FORMAT(A, B) \ |
| 576 | case A##_w: \ |
| 577 | case A##_x: mnemonic = B; break; |
| 578 | FORMAT(RBIT, "rbit"); |
| 579 | FORMAT(REV16, "rev16"); |
| 580 | FORMAT(REV, "rev"); |
| 581 | FORMAT(CLZ, "clz"); |
| 582 | FORMAT(CLS, "cls"); |
| 583 | #undef FORMAT |
| 584 | case REV32_x: mnemonic = "rev32"; break; |
| 585 | default: UNREACHABLE(); |
| 586 | } |
| 587 | Format(instr, mnemonic, form); |
| 588 | } |
| 589 | |
| 590 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 591 | void DisassemblingDecoder::VisitDataProcessing2Source(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 592 | const char *mnemonic = "unimplemented"; |
| 593 | const char *form = "'Rd, 'Rn, 'Rm"; |
| 594 | |
| 595 | switch (instr->Mask(DataProcessing2SourceMask)) { |
| 596 | #define FORMAT(A, B) \ |
| 597 | case A##_w: \ |
| 598 | case A##_x: mnemonic = B; break; |
| 599 | FORMAT(UDIV, "udiv"); |
| 600 | FORMAT(SDIV, "sdiv"); |
| 601 | FORMAT(LSLV, "lsl"); |
| 602 | FORMAT(LSRV, "lsr"); |
| 603 | FORMAT(ASRV, "asr"); |
| 604 | FORMAT(RORV, "ror"); |
| 605 | #undef FORMAT |
| 606 | default: form = "(DataProcessing2Source)"; |
| 607 | } |
| 608 | Format(instr, mnemonic, form); |
| 609 | } |
| 610 | |
| 611 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 612 | void DisassemblingDecoder::VisitDataProcessing3Source(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 613 | bool ra_is_zr = RaIsZROrSP(instr); |
| 614 | const char *mnemonic = ""; |
| 615 | const char *form = "'Xd, 'Wn, 'Wm, 'Xa"; |
| 616 | const char *form_rrr = "'Rd, 'Rn, 'Rm"; |
| 617 | const char *form_rrrr = "'Rd, 'Rn, 'Rm, 'Ra"; |
| 618 | const char *form_xww = "'Xd, 'Wn, 'Wm"; |
| 619 | const char *form_xxx = "'Xd, 'Xn, 'Xm"; |
| 620 | |
| 621 | switch (instr->Mask(DataProcessing3SourceMask)) { |
| 622 | case MADD_w: |
| 623 | case MADD_x: { |
| 624 | mnemonic = "madd"; |
| 625 | form = form_rrrr; |
| 626 | if (ra_is_zr) { |
| 627 | mnemonic = "mul"; |
| 628 | form = form_rrr; |
| 629 | } |
| 630 | break; |
| 631 | } |
| 632 | case MSUB_w: |
| 633 | case MSUB_x: { |
| 634 | mnemonic = "msub"; |
| 635 | form = form_rrrr; |
| 636 | if (ra_is_zr) { |
| 637 | mnemonic = "mneg"; |
| 638 | form = form_rrr; |
| 639 | } |
| 640 | break; |
| 641 | } |
| 642 | case SMADDL_x: { |
| 643 | mnemonic = "smaddl"; |
| 644 | if (ra_is_zr) { |
| 645 | mnemonic = "smull"; |
| 646 | form = form_xww; |
| 647 | } |
| 648 | break; |
| 649 | } |
| 650 | case SMSUBL_x: { |
| 651 | mnemonic = "smsubl"; |
| 652 | if (ra_is_zr) { |
| 653 | mnemonic = "smnegl"; |
| 654 | form = form_xww; |
| 655 | } |
| 656 | break; |
| 657 | } |
| 658 | case UMADDL_x: { |
| 659 | mnemonic = "umaddl"; |
| 660 | if (ra_is_zr) { |
| 661 | mnemonic = "umull"; |
| 662 | form = form_xww; |
| 663 | } |
| 664 | break; |
| 665 | } |
| 666 | case UMSUBL_x: { |
| 667 | mnemonic = "umsubl"; |
| 668 | if (ra_is_zr) { |
| 669 | mnemonic = "umnegl"; |
| 670 | form = form_xww; |
| 671 | } |
| 672 | break; |
| 673 | } |
| 674 | case SMULH_x: { |
| 675 | mnemonic = "smulh"; |
| 676 | form = form_xxx; |
| 677 | break; |
| 678 | } |
| 679 | case UMULH_x: { |
| 680 | mnemonic = "umulh"; |
| 681 | form = form_xxx; |
| 682 | break; |
| 683 | } |
| 684 | default: UNREACHABLE(); |
| 685 | } |
| 686 | Format(instr, mnemonic, form); |
| 687 | } |
| 688 | |
| 689 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 690 | void DisassemblingDecoder::VisitCompareBranch(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 691 | const char *mnemonic = ""; |
| 692 | const char *form = "'Rt, 'BImmCmpa"; |
| 693 | |
| 694 | switch (instr->Mask(CompareBranchMask)) { |
| 695 | case CBZ_w: |
| 696 | case CBZ_x: mnemonic = "cbz"; break; |
| 697 | case CBNZ_w: |
| 698 | case CBNZ_x: mnemonic = "cbnz"; break; |
| 699 | default: UNREACHABLE(); |
| 700 | } |
| 701 | Format(instr, mnemonic, form); |
| 702 | } |
| 703 | |
| 704 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 705 | void DisassemblingDecoder::VisitTestBranch(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 706 | const char *mnemonic = ""; |
| 707 | // If the top bit of the immediate is clear, the tested register is |
| 708 | // disassembled as Wt, otherwise Xt. As the top bit of the immediate is |
| 709 | // encoded in bit 31 of the instruction, we can reuse the Rt form, which |
| 710 | // uses bit 31 (normally "sf") to choose the register size. |
| 711 | const char *form = "'Rt, 'IS, 'BImmTest"; |
| 712 | |
| 713 | switch (instr->Mask(TestBranchMask)) { |
| 714 | case TBZ: mnemonic = "tbz"; break; |
| 715 | case TBNZ: mnemonic = "tbnz"; break; |
| 716 | default: UNREACHABLE(); |
| 717 | } |
| 718 | Format(instr, mnemonic, form); |
| 719 | } |
| 720 | |
| 721 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 722 | void DisassemblingDecoder::VisitMoveWideImmediate(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 723 | const char *mnemonic = ""; |
| 724 | const char *form = "'Rd, 'IMoveImm"; |
| 725 | |
| 726 | // Print the shift separately for movk, to make it clear which half word will |
| 727 | // be overwritten. Movn and movz print the computed immediate, which includes |
| 728 | // shift calculation. |
| 729 | switch (instr->Mask(MoveWideImmediateMask)) { |
| 730 | case MOVN_w: |
| 731 | case MOVN_x: mnemonic = "movn"; break; |
| 732 | case MOVZ_w: |
| 733 | case MOVZ_x: mnemonic = "movz"; break; |
| 734 | case MOVK_w: |
| 735 | case MOVK_x: mnemonic = "movk"; form = "'Rd, 'IMoveLSL"; break; |
| 736 | default: UNREACHABLE(); |
| 737 | } |
| 738 | Format(instr, mnemonic, form); |
| 739 | } |
| 740 | |
| 741 | |
| 742 | #define LOAD_STORE_LIST(V) \ |
| 743 | V(STRB_w, "strb", "'Wt") \ |
| 744 | V(STRH_w, "strh", "'Wt") \ |
| 745 | V(STR_w, "str", "'Wt") \ |
| 746 | V(STR_x, "str", "'Xt") \ |
| 747 | V(LDRB_w, "ldrb", "'Wt") \ |
| 748 | V(LDRH_w, "ldrh", "'Wt") \ |
| 749 | V(LDR_w, "ldr", "'Wt") \ |
| 750 | V(LDR_x, "ldr", "'Xt") \ |
| 751 | V(LDRSB_x, "ldrsb", "'Xt") \ |
| 752 | V(LDRSH_x, "ldrsh", "'Xt") \ |
| 753 | V(LDRSW_x, "ldrsw", "'Xt") \ |
| 754 | V(LDRSB_w, "ldrsb", "'Wt") \ |
| 755 | V(LDRSH_w, "ldrsh", "'Wt") \ |
| 756 | V(STR_s, "str", "'St") \ |
| 757 | V(STR_d, "str", "'Dt") \ |
| 758 | V(LDR_s, "ldr", "'St") \ |
| 759 | V(LDR_d, "ldr", "'Dt") |
| 760 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 761 | void DisassemblingDecoder::VisitLoadStorePreIndex(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 762 | const char *mnemonic = "unimplemented"; |
| 763 | const char *form = "(LoadStorePreIndex)"; |
| 764 | |
| 765 | switch (instr->Mask(LoadStorePreIndexMask)) { |
| 766 | #define LS_PREINDEX(A, B, C) \ |
| 767 | case A##_pre: mnemonic = B; form = C ", ['Xns'ILS]!"; break; |
| 768 | LOAD_STORE_LIST(LS_PREINDEX) |
| 769 | #undef LS_PREINDEX |
| 770 | } |
| 771 | Format(instr, mnemonic, form); |
| 772 | } |
| 773 | |
| 774 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 775 | void DisassemblingDecoder::VisitLoadStorePostIndex(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 776 | const char *mnemonic = "unimplemented"; |
| 777 | const char *form = "(LoadStorePostIndex)"; |
| 778 | |
| 779 | switch (instr->Mask(LoadStorePostIndexMask)) { |
| 780 | #define LS_POSTINDEX(A, B, C) \ |
| 781 | case A##_post: mnemonic = B; form = C ", ['Xns]'ILS"; break; |
| 782 | LOAD_STORE_LIST(LS_POSTINDEX) |
| 783 | #undef LS_POSTINDEX |
| 784 | } |
| 785 | Format(instr, mnemonic, form); |
| 786 | } |
| 787 | |
| 788 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 789 | void DisassemblingDecoder::VisitLoadStoreUnsignedOffset(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 790 | const char *mnemonic = "unimplemented"; |
| 791 | const char *form = "(LoadStoreUnsignedOffset)"; |
| 792 | |
| 793 | switch (instr->Mask(LoadStoreUnsignedOffsetMask)) { |
| 794 | #define LS_UNSIGNEDOFFSET(A, B, C) \ |
| 795 | case A##_unsigned: mnemonic = B; form = C ", ['Xns'ILU]"; break; |
| 796 | LOAD_STORE_LIST(LS_UNSIGNEDOFFSET) |
| 797 | #undef LS_UNSIGNEDOFFSET |
| 798 | case PRFM_unsigned: mnemonic = "prfm"; form = "'PrefOp, ['Xn'ILU]"; |
| 799 | } |
| 800 | Format(instr, mnemonic, form); |
| 801 | } |
| 802 | |
| 803 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 804 | void DisassemblingDecoder::VisitLoadStoreRegisterOffset(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 805 | const char *mnemonic = "unimplemented"; |
| 806 | const char *form = "(LoadStoreRegisterOffset)"; |
| 807 | |
| 808 | switch (instr->Mask(LoadStoreRegisterOffsetMask)) { |
| 809 | #define LS_REGISTEROFFSET(A, B, C) \ |
| 810 | case A##_reg: mnemonic = B; form = C ", ['Xns, 'Offsetreg]"; break; |
| 811 | LOAD_STORE_LIST(LS_REGISTEROFFSET) |
| 812 | #undef LS_REGISTEROFFSET |
| 813 | case PRFM_reg: mnemonic = "prfm"; form = "'PrefOp, ['Xns, 'Offsetreg]"; |
| 814 | } |
| 815 | Format(instr, mnemonic, form); |
| 816 | } |
| 817 | |
| 818 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 819 | void DisassemblingDecoder::VisitLoadStoreUnscaledOffset(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 820 | const char *mnemonic = "unimplemented"; |
| 821 | const char *form = "'Wt, ['Xns'ILS]"; |
| 822 | const char *form_x = "'Xt, ['Xns'ILS]"; |
| 823 | const char *form_s = "'St, ['Xns'ILS]"; |
| 824 | const char *form_d = "'Dt, ['Xns'ILS]"; |
| 825 | |
| 826 | switch (instr->Mask(LoadStoreUnscaledOffsetMask)) { |
| 827 | case STURB_w: mnemonic = "sturb"; break; |
| 828 | case STURH_w: mnemonic = "sturh"; break; |
| 829 | case STUR_w: mnemonic = "stur"; break; |
| 830 | case STUR_x: mnemonic = "stur"; form = form_x; break; |
| 831 | case STUR_s: mnemonic = "stur"; form = form_s; break; |
| 832 | case STUR_d: mnemonic = "stur"; form = form_d; break; |
| 833 | case LDURB_w: mnemonic = "ldurb"; break; |
| 834 | case LDURH_w: mnemonic = "ldurh"; break; |
| 835 | case LDUR_w: mnemonic = "ldur"; break; |
| 836 | case LDUR_x: mnemonic = "ldur"; form = form_x; break; |
| 837 | case LDUR_s: mnemonic = "ldur"; form = form_s; break; |
| 838 | case LDUR_d: mnemonic = "ldur"; form = form_d; break; |
| 839 | case LDURSB_x: form = form_x; // Fall through. |
| 840 | case LDURSB_w: mnemonic = "ldursb"; break; |
| 841 | case LDURSH_x: form = form_x; // Fall through. |
| 842 | case LDURSH_w: mnemonic = "ldursh"; break; |
| 843 | case LDURSW_x: mnemonic = "ldursw"; form = form_x; break; |
| 844 | default: form = "(LoadStoreUnscaledOffset)"; |
| 845 | } |
| 846 | Format(instr, mnemonic, form); |
| 847 | } |
| 848 | |
| 849 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 850 | void DisassemblingDecoder::VisitLoadLiteral(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 851 | const char *mnemonic = "ldr"; |
| 852 | const char *form = "(LoadLiteral)"; |
| 853 | |
| 854 | switch (instr->Mask(LoadLiteralMask)) { |
| 855 | case LDR_w_lit: form = "'Wt, 'ILLiteral 'LValue"; break; |
| 856 | case LDR_x_lit: form = "'Xt, 'ILLiteral 'LValue"; break; |
| 857 | case LDR_s_lit: form = "'St, 'ILLiteral 'LValue"; break; |
| 858 | case LDR_d_lit: form = "'Dt, 'ILLiteral 'LValue"; break; |
| 859 | default: mnemonic = "unimplemented"; |
| 860 | } |
| 861 | Format(instr, mnemonic, form); |
| 862 | } |
| 863 | |
| 864 | |
| 865 | #define LOAD_STORE_PAIR_LIST(V) \ |
| 866 | V(STP_w, "stp", "'Wt, 'Wt2", "4") \ |
| 867 | V(LDP_w, "ldp", "'Wt, 'Wt2", "4") \ |
| 868 | V(LDPSW_x, "ldpsw", "'Xt, 'Xt2", "4") \ |
| 869 | V(STP_x, "stp", "'Xt, 'Xt2", "8") \ |
| 870 | V(LDP_x, "ldp", "'Xt, 'Xt2", "8") \ |
| 871 | V(STP_s, "stp", "'St, 'St2", "4") \ |
| 872 | V(LDP_s, "ldp", "'St, 'St2", "4") \ |
| 873 | V(STP_d, "stp", "'Dt, 'Dt2", "8") \ |
| 874 | V(LDP_d, "ldp", "'Dt, 'Dt2", "8") |
| 875 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 876 | void DisassemblingDecoder::VisitLoadStorePairPostIndex(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 877 | const char *mnemonic = "unimplemented"; |
| 878 | const char *form = "(LoadStorePairPostIndex)"; |
| 879 | |
| 880 | switch (instr->Mask(LoadStorePairPostIndexMask)) { |
| 881 | #define LSP_POSTINDEX(A, B, C, D) \ |
| 882 | case A##_post: mnemonic = B; form = C ", ['Xns]'ILP" D; break; |
| 883 | LOAD_STORE_PAIR_LIST(LSP_POSTINDEX) |
| 884 | #undef LSP_POSTINDEX |
| 885 | } |
| 886 | Format(instr, mnemonic, form); |
| 887 | } |
| 888 | |
| 889 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 890 | void DisassemblingDecoder::VisitLoadStorePairPreIndex(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 891 | const char *mnemonic = "unimplemented"; |
| 892 | const char *form = "(LoadStorePairPreIndex)"; |
| 893 | |
| 894 | switch (instr->Mask(LoadStorePairPreIndexMask)) { |
| 895 | #define LSP_PREINDEX(A, B, C, D) \ |
| 896 | case A##_pre: mnemonic = B; form = C ", ['Xns'ILP" D "]!"; break; |
| 897 | LOAD_STORE_PAIR_LIST(LSP_PREINDEX) |
| 898 | #undef LSP_PREINDEX |
| 899 | } |
| 900 | Format(instr, mnemonic, form); |
| 901 | } |
| 902 | |
| 903 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 904 | void DisassemblingDecoder::VisitLoadStorePairOffset(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 905 | const char *mnemonic = "unimplemented"; |
| 906 | const char *form = "(LoadStorePairOffset)"; |
| 907 | |
| 908 | switch (instr->Mask(LoadStorePairOffsetMask)) { |
| 909 | #define LSP_OFFSET(A, B, C, D) \ |
| 910 | case A##_off: mnemonic = B; form = C ", ['Xns'ILP" D "]"; break; |
| 911 | LOAD_STORE_PAIR_LIST(LSP_OFFSET) |
| 912 | #undef LSP_OFFSET |
| 913 | } |
| 914 | Format(instr, mnemonic, form); |
| 915 | } |
| 916 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 917 | void DisassemblingDecoder::VisitLoadStoreAcquireRelease(Instruction *instr) { |
| 918 | const char *mnemonic = "unimplemented"; |
| 919 | const char *form = "'Wt, ['Xn]"; |
| 920 | const char *form_x = "'Xt, ['Xn]"; |
| 921 | const char *form_stlx = "'Ws, 'Wt, ['Xn]"; |
| 922 | const char *form_stlx_x = "'Ws, 'Xt, ['Xn]"; |
| 923 | |
| 924 | switch (instr->Mask(LoadStoreAcquireReleaseMask)) { |
| 925 | case LDAXR_b: mnemonic = "ldaxrb"; break; |
| 926 | case STLR_b: mnemonic = "stlrb"; break; |
| 927 | case LDAR_b: mnemonic = "ldarb"; break; |
| 928 | case LDAXR_h: mnemonic = "ldaxrh"; break; |
| 929 | case STLR_h: mnemonic = "stlrh"; break; |
| 930 | case LDAR_h: mnemonic = "ldarh"; break; |
| 931 | case LDAXR_w: mnemonic = "ldaxr"; break; |
| 932 | case STLR_w: mnemonic = "stlr"; break; |
| 933 | case LDAR_w: mnemonic = "ldar"; break; |
| 934 | case LDAXR_x: mnemonic = "ldaxr"; form = form_x; break; |
| 935 | case STLR_x: mnemonic = "stlr"; form = form_x; break; |
| 936 | case LDAR_x: mnemonic = "ldar"; form = form_x; break; |
| 937 | case STLXR_h: mnemonic = "stlxrh"; form = form_stlx; break; |
| 938 | case STLXR_b: mnemonic = "stlxrb"; form = form_stlx; break; |
| 939 | case STLXR_w: mnemonic = "stlxr"; form = form_stlx; break; |
| 940 | case STLXR_x: mnemonic = "stlxr"; form = form_stlx_x; break; |
| 941 | default: form = "(LoadStoreAcquireReleaseMask)"; |
| 942 | } |
| 943 | Format(instr, mnemonic, form); |
| 944 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 945 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 946 | void DisassemblingDecoder::VisitFPCompare(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 947 | const char *mnemonic = "unimplemented"; |
| 948 | const char *form = "'Fn, 'Fm"; |
| 949 | const char *form_zero = "'Fn, #0.0"; |
| 950 | |
| 951 | switch (instr->Mask(FPCompareMask)) { |
| 952 | case FCMP_s_zero: |
| 953 | case FCMP_d_zero: form = form_zero; // Fall through. |
| 954 | case FCMP_s: |
| 955 | case FCMP_d: mnemonic = "fcmp"; break; |
| 956 | default: form = "(FPCompare)"; |
| 957 | } |
| 958 | Format(instr, mnemonic, form); |
| 959 | } |
| 960 | |
| 961 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 962 | void DisassemblingDecoder::VisitFPConditionalCompare(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 963 | const char *mnemonic = "unimplemented"; |
| 964 | const char *form = "'Fn, 'Fm, 'INzcv, 'Cond"; |
| 965 | |
| 966 | switch (instr->Mask(FPConditionalCompareMask)) { |
| 967 | case FCCMP_s: |
| 968 | case FCCMP_d: mnemonic = "fccmp"; break; |
| 969 | case FCCMPE_s: |
| 970 | case FCCMPE_d: mnemonic = "fccmpe"; break; |
| 971 | default: form = "(FPConditionalCompare)"; |
| 972 | } |
| 973 | Format(instr, mnemonic, form); |
| 974 | } |
| 975 | |
| 976 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 977 | void DisassemblingDecoder::VisitFPConditionalSelect(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 978 | const char *mnemonic = ""; |
| 979 | const char *form = "'Fd, 'Fn, 'Fm, 'Cond"; |
| 980 | |
| 981 | switch (instr->Mask(FPConditionalSelectMask)) { |
| 982 | case FCSEL_s: |
| 983 | case FCSEL_d: mnemonic = "fcsel"; break; |
| 984 | default: UNREACHABLE(); |
| 985 | } |
| 986 | Format(instr, mnemonic, form); |
| 987 | } |
| 988 | |
| 989 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 990 | void DisassemblingDecoder::VisitFPDataProcessing1Source(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 991 | const char *mnemonic = "unimplemented"; |
| 992 | const char *form = "'Fd, 'Fn"; |
| 993 | |
| 994 | switch (instr->Mask(FPDataProcessing1SourceMask)) { |
| 995 | #define FORMAT(A, B) \ |
| 996 | case A##_s: \ |
| 997 | case A##_d: mnemonic = B; break; |
| 998 | FORMAT(FMOV, "fmov"); |
| 999 | FORMAT(FABS, "fabs"); |
| 1000 | FORMAT(FNEG, "fneg"); |
| 1001 | FORMAT(FSQRT, "fsqrt"); |
| 1002 | FORMAT(FRINTN, "frintn"); |
| 1003 | FORMAT(FRINTP, "frintp"); |
| 1004 | FORMAT(FRINTM, "frintm"); |
| 1005 | FORMAT(FRINTZ, "frintz"); |
| 1006 | FORMAT(FRINTA, "frinta"); |
| 1007 | FORMAT(FRINTX, "frintx"); |
| 1008 | FORMAT(FRINTI, "frinti"); |
| 1009 | #undef FORMAT |
| 1010 | case FCVT_ds: mnemonic = "fcvt"; form = "'Dd, 'Sn"; break; |
| 1011 | case FCVT_sd: mnemonic = "fcvt"; form = "'Sd, 'Dn"; break; |
| 1012 | default: form = "(FPDataProcessing1Source)"; |
| 1013 | } |
| 1014 | Format(instr, mnemonic, form); |
| 1015 | } |
| 1016 | |
| 1017 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1018 | void DisassemblingDecoder::VisitFPDataProcessing2Source(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1019 | const char *mnemonic = ""; |
| 1020 | const char *form = "'Fd, 'Fn, 'Fm"; |
| 1021 | |
| 1022 | switch (instr->Mask(FPDataProcessing2SourceMask)) { |
| 1023 | #define FORMAT(A, B) \ |
| 1024 | case A##_s: \ |
| 1025 | case A##_d: mnemonic = B; break; |
| 1026 | FORMAT(FMUL, "fmul"); |
| 1027 | FORMAT(FDIV, "fdiv"); |
| 1028 | FORMAT(FADD, "fadd"); |
| 1029 | FORMAT(FSUB, "fsub"); |
| 1030 | FORMAT(FMAX, "fmax"); |
| 1031 | FORMAT(FMIN, "fmin"); |
| 1032 | FORMAT(FMAXNM, "fmaxnm"); |
| 1033 | FORMAT(FMINNM, "fminnm"); |
| 1034 | FORMAT(FNMUL, "fnmul"); |
| 1035 | #undef FORMAT |
| 1036 | default: UNREACHABLE(); |
| 1037 | } |
| 1038 | Format(instr, mnemonic, form); |
| 1039 | } |
| 1040 | |
| 1041 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1042 | void DisassemblingDecoder::VisitFPDataProcessing3Source(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1043 | const char *mnemonic = ""; |
| 1044 | const char *form = "'Fd, 'Fn, 'Fm, 'Fa"; |
| 1045 | |
| 1046 | switch (instr->Mask(FPDataProcessing3SourceMask)) { |
| 1047 | #define FORMAT(A, B) \ |
| 1048 | case A##_s: \ |
| 1049 | case A##_d: mnemonic = B; break; |
| 1050 | FORMAT(FMADD, "fmadd"); |
| 1051 | FORMAT(FMSUB, "fmsub"); |
| 1052 | FORMAT(FNMADD, "fnmadd"); |
| 1053 | FORMAT(FNMSUB, "fnmsub"); |
| 1054 | #undef FORMAT |
| 1055 | default: UNREACHABLE(); |
| 1056 | } |
| 1057 | Format(instr, mnemonic, form); |
| 1058 | } |
| 1059 | |
| 1060 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1061 | void DisassemblingDecoder::VisitFPImmediate(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1062 | const char *mnemonic = ""; |
| 1063 | const char *form = "(FPImmediate)"; |
| 1064 | |
| 1065 | switch (instr->Mask(FPImmediateMask)) { |
| 1066 | case FMOV_s_imm: mnemonic = "fmov"; form = "'Sd, 'IFPSingle"; break; |
| 1067 | case FMOV_d_imm: mnemonic = "fmov"; form = "'Dd, 'IFPDouble"; break; |
| 1068 | default: UNREACHABLE(); |
| 1069 | } |
| 1070 | Format(instr, mnemonic, form); |
| 1071 | } |
| 1072 | |
| 1073 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1074 | void DisassemblingDecoder::VisitFPIntegerConvert(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1075 | const char *mnemonic = "unimplemented"; |
| 1076 | const char *form = "(FPIntegerConvert)"; |
| 1077 | const char *form_rf = "'Rd, 'Fn"; |
| 1078 | const char *form_fr = "'Fd, 'Rn"; |
| 1079 | |
| 1080 | switch (instr->Mask(FPIntegerConvertMask)) { |
| 1081 | case FMOV_ws: |
| 1082 | case FMOV_xd: mnemonic = "fmov"; form = form_rf; break; |
| 1083 | case FMOV_sw: |
| 1084 | case FMOV_dx: mnemonic = "fmov"; form = form_fr; break; |
| 1085 | case FCVTAS_ws: |
| 1086 | case FCVTAS_xs: |
| 1087 | case FCVTAS_wd: |
| 1088 | case FCVTAS_xd: mnemonic = "fcvtas"; form = form_rf; break; |
| 1089 | case FCVTAU_ws: |
| 1090 | case FCVTAU_xs: |
| 1091 | case FCVTAU_wd: |
| 1092 | case FCVTAU_xd: mnemonic = "fcvtau"; form = form_rf; break; |
| 1093 | case FCVTMS_ws: |
| 1094 | case FCVTMS_xs: |
| 1095 | case FCVTMS_wd: |
| 1096 | case FCVTMS_xd: mnemonic = "fcvtms"; form = form_rf; break; |
| 1097 | case FCVTMU_ws: |
| 1098 | case FCVTMU_xs: |
| 1099 | case FCVTMU_wd: |
| 1100 | case FCVTMU_xd: mnemonic = "fcvtmu"; form = form_rf; break; |
| 1101 | case FCVTNS_ws: |
| 1102 | case FCVTNS_xs: |
| 1103 | case FCVTNS_wd: |
| 1104 | case FCVTNS_xd: mnemonic = "fcvtns"; form = form_rf; break; |
| 1105 | case FCVTNU_ws: |
| 1106 | case FCVTNU_xs: |
| 1107 | case FCVTNU_wd: |
| 1108 | case FCVTNU_xd: mnemonic = "fcvtnu"; form = form_rf; break; |
| 1109 | case FCVTZU_xd: |
| 1110 | case FCVTZU_ws: |
| 1111 | case FCVTZU_wd: |
| 1112 | case FCVTZU_xs: mnemonic = "fcvtzu"; form = form_rf; break; |
| 1113 | case FCVTZS_xd: |
| 1114 | case FCVTZS_wd: |
| 1115 | case FCVTZS_xs: |
| 1116 | case FCVTZS_ws: mnemonic = "fcvtzs"; form = form_rf; break; |
| 1117 | case SCVTF_sw: |
| 1118 | case SCVTF_sx: |
| 1119 | case SCVTF_dw: |
| 1120 | case SCVTF_dx: mnemonic = "scvtf"; form = form_fr; break; |
| 1121 | case UCVTF_sw: |
| 1122 | case UCVTF_sx: |
| 1123 | case UCVTF_dw: |
| 1124 | case UCVTF_dx: mnemonic = "ucvtf"; form = form_fr; break; |
| 1125 | } |
| 1126 | Format(instr, mnemonic, form); |
| 1127 | } |
| 1128 | |
| 1129 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1130 | void DisassemblingDecoder::VisitFPFixedPointConvert(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1131 | const char *mnemonic = ""; |
| 1132 | const char *form = "'Rd, 'Fn, 'IFPFBits"; |
| 1133 | const char *form_fr = "'Fd, 'Rn, 'IFPFBits"; |
| 1134 | |
| 1135 | switch (instr->Mask(FPFixedPointConvertMask)) { |
| 1136 | case FCVTZS_ws_fixed: |
| 1137 | case FCVTZS_xs_fixed: |
| 1138 | case FCVTZS_wd_fixed: |
| 1139 | case FCVTZS_xd_fixed: mnemonic = "fcvtzs"; break; |
| 1140 | case FCVTZU_ws_fixed: |
| 1141 | case FCVTZU_xs_fixed: |
| 1142 | case FCVTZU_wd_fixed: |
| 1143 | case FCVTZU_xd_fixed: mnemonic = "fcvtzu"; break; |
| 1144 | case SCVTF_sw_fixed: |
| 1145 | case SCVTF_sx_fixed: |
| 1146 | case SCVTF_dw_fixed: |
| 1147 | case SCVTF_dx_fixed: mnemonic = "scvtf"; form = form_fr; break; |
| 1148 | case UCVTF_sw_fixed: |
| 1149 | case UCVTF_sx_fixed: |
| 1150 | case UCVTF_dw_fixed: |
| 1151 | case UCVTF_dx_fixed: mnemonic = "ucvtf"; form = form_fr; break; |
| 1152 | } |
| 1153 | Format(instr, mnemonic, form); |
| 1154 | } |
| 1155 | |
| 1156 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1157 | void DisassemblingDecoder::VisitSystem(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1158 | // Some system instructions hijack their Op and Cp fields to represent a |
| 1159 | // range of immediates instead of indicating a different instruction. This |
| 1160 | // makes the decoding tricky. |
| 1161 | const char *mnemonic = "unimplemented"; |
| 1162 | const char *form = "(System)"; |
| 1163 | |
| 1164 | if (instr->Mask(SystemSysRegFMask) == SystemSysRegFixed) { |
| 1165 | switch (instr->Mask(SystemSysRegMask)) { |
| 1166 | case MRS: { |
| 1167 | mnemonic = "mrs"; |
| 1168 | switch (instr->ImmSystemRegister()) { |
| 1169 | case NZCV: form = "'Xt, nzcv"; break; |
| 1170 | case FPCR: form = "'Xt, fpcr"; break; |
| 1171 | default: form = "'Xt, (unknown)"; break; |
| 1172 | } |
| 1173 | break; |
| 1174 | } |
| 1175 | case MSR: { |
| 1176 | mnemonic = "msr"; |
| 1177 | switch (instr->ImmSystemRegister()) { |
| 1178 | case NZCV: form = "nzcv, 'Xt"; break; |
| 1179 | case FPCR: form = "fpcr, 'Xt"; break; |
| 1180 | default: form = "(unknown), 'Xt"; break; |
| 1181 | } |
| 1182 | break; |
| 1183 | } |
| 1184 | } |
| 1185 | } else if (instr->Mask(SystemHintFMask) == SystemHintFixed) { |
| 1186 | DCHECK(instr->Mask(SystemHintMask) == HINT); |
| 1187 | switch (instr->ImmHint()) { |
| 1188 | case NOP: { |
| 1189 | mnemonic = "nop"; |
| 1190 | form = NULL; |
| 1191 | break; |
| 1192 | } |
| 1193 | } |
| 1194 | } else if (instr->Mask(MemBarrierFMask) == MemBarrierFixed) { |
| 1195 | switch (instr->Mask(MemBarrierMask)) { |
| 1196 | case DMB: { |
| 1197 | mnemonic = "dmb"; |
| 1198 | form = "'M"; |
| 1199 | break; |
| 1200 | } |
| 1201 | case DSB: { |
| 1202 | mnemonic = "dsb"; |
| 1203 | form = "'M"; |
| 1204 | break; |
| 1205 | } |
| 1206 | case ISB: { |
| 1207 | mnemonic = "isb"; |
| 1208 | form = NULL; |
| 1209 | break; |
| 1210 | } |
| 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | Format(instr, mnemonic, form); |
| 1215 | } |
| 1216 | |
| 1217 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1218 | void DisassemblingDecoder::VisitException(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1219 | const char *mnemonic = "unimplemented"; |
| 1220 | const char *form = "'IDebug"; |
| 1221 | |
| 1222 | switch (instr->Mask(ExceptionMask)) { |
| 1223 | case HLT: mnemonic = "hlt"; break; |
| 1224 | case BRK: mnemonic = "brk"; break; |
| 1225 | case SVC: mnemonic = "svc"; break; |
| 1226 | case HVC: mnemonic = "hvc"; break; |
| 1227 | case SMC: mnemonic = "smc"; break; |
| 1228 | case DCPS1: mnemonic = "dcps1"; form = "{'IDebug}"; break; |
| 1229 | case DCPS2: mnemonic = "dcps2"; form = "{'IDebug}"; break; |
| 1230 | case DCPS3: mnemonic = "dcps3"; form = "{'IDebug}"; break; |
| 1231 | default: form = "(Exception)"; |
| 1232 | } |
| 1233 | Format(instr, mnemonic, form); |
| 1234 | } |
| 1235 | |
| 1236 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1237 | void DisassemblingDecoder::VisitUnimplemented(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1238 | Format(instr, "unimplemented", "(Unimplemented)"); |
| 1239 | } |
| 1240 | |
| 1241 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1242 | void DisassemblingDecoder::VisitUnallocated(Instruction* instr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1243 | Format(instr, "unallocated", "(Unallocated)"); |
| 1244 | } |
| 1245 | |
| 1246 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1247 | void DisassemblingDecoder::ProcessOutput(Instruction* /*instr*/) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1248 | // The base disasm does nothing more than disassembling into a buffer. |
| 1249 | } |
| 1250 | |
| 1251 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1252 | void DisassemblingDecoder::Format(Instruction* instr, const char* mnemonic, |
| 1253 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1254 | // TODO(mcapewel) don't think I can use the instr address here - there needs |
| 1255 | // to be a base address too |
| 1256 | DCHECK(mnemonic != NULL); |
| 1257 | ResetOutput(); |
| 1258 | Substitute(instr, mnemonic); |
| 1259 | if (format != NULL) { |
| 1260 | buffer_[buffer_pos_++] = ' '; |
| 1261 | Substitute(instr, format); |
| 1262 | } |
| 1263 | buffer_[buffer_pos_] = 0; |
| 1264 | ProcessOutput(instr); |
| 1265 | } |
| 1266 | |
| 1267 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1268 | void DisassemblingDecoder::Substitute(Instruction* instr, const char* string) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1269 | char chr = *string++; |
| 1270 | while (chr != '\0') { |
| 1271 | if (chr == '\'') { |
| 1272 | string += SubstituteField(instr, string); |
| 1273 | } else { |
| 1274 | buffer_[buffer_pos_++] = chr; |
| 1275 | } |
| 1276 | chr = *string++; |
| 1277 | } |
| 1278 | } |
| 1279 | |
| 1280 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1281 | int DisassemblingDecoder::SubstituteField(Instruction* instr, |
| 1282 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1283 | switch (format[0]) { |
| 1284 | case 'R': // Register. X or W, selected by sf bit. |
| 1285 | case 'F': // FP Register. S or D, selected by type field. |
| 1286 | case 'W': |
| 1287 | case 'X': |
| 1288 | case 'S': |
| 1289 | case 'D': return SubstituteRegisterField(instr, format); |
| 1290 | case 'I': return SubstituteImmediateField(instr, format); |
| 1291 | case 'L': return SubstituteLiteralField(instr, format); |
| 1292 | case 'H': return SubstituteShiftField(instr, format); |
| 1293 | case 'P': return SubstitutePrefetchField(instr, format); |
| 1294 | case 'C': return SubstituteConditionField(instr, format); |
| 1295 | case 'E': return SubstituteExtendField(instr, format); |
| 1296 | case 'A': return SubstitutePCRelAddressField(instr, format); |
| 1297 | case 'B': return SubstituteBranchTargetField(instr, format); |
| 1298 | case 'O': return SubstituteLSRegOffsetField(instr, format); |
| 1299 | case 'M': return SubstituteBarrierField(instr, format); |
| 1300 | default: { |
| 1301 | UNREACHABLE(); |
| 1302 | return 1; |
| 1303 | } |
| 1304 | } |
| 1305 | } |
| 1306 | |
| 1307 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1308 | int DisassemblingDecoder::SubstituteRegisterField(Instruction* instr, |
| 1309 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1310 | unsigned reg_num = 0; |
| 1311 | unsigned field_len = 2; |
| 1312 | switch (format[1]) { |
| 1313 | case 'd': reg_num = instr->Rd(); break; |
| 1314 | case 'n': reg_num = instr->Rn(); break; |
| 1315 | case 'm': reg_num = instr->Rm(); break; |
| 1316 | case 'a': reg_num = instr->Ra(); break; |
| 1317 | case 't': { |
| 1318 | if (format[2] == '2') { |
| 1319 | reg_num = instr->Rt2(); |
| 1320 | field_len = 3; |
| 1321 | } else { |
| 1322 | reg_num = instr->Rt(); |
| 1323 | } |
| 1324 | break; |
| 1325 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1326 | case 's': |
| 1327 | reg_num = instr->Rs(); |
| 1328 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1329 | default: UNREACHABLE(); |
| 1330 | } |
| 1331 | |
| 1332 | // Increase field length for registers tagged as stack. |
| 1333 | if (format[2] == 's') { |
| 1334 | field_len = 3; |
| 1335 | } |
| 1336 | |
| 1337 | char reg_type; |
| 1338 | if (format[0] == 'R') { |
| 1339 | // Register type is R: use sf bit to choose X and W. |
| 1340 | reg_type = instr->SixtyFourBits() ? 'x' : 'w'; |
| 1341 | } else if (format[0] == 'F') { |
| 1342 | // Floating-point register: use type field to choose S or D. |
| 1343 | reg_type = ((instr->FPType() & 1) == 0) ? 's' : 'd'; |
| 1344 | } else { |
| 1345 | // Register type is specified. Make it lower case. |
| 1346 | reg_type = format[0] + 0x20; |
| 1347 | } |
| 1348 | |
| 1349 | if ((reg_num != kZeroRegCode) || (reg_type == 's') || (reg_type == 'd')) { |
| 1350 | // A normal register: w0 - w30, x0 - x30, s0 - s31, d0 - d31. |
| 1351 | |
| 1352 | // Filter special registers |
| 1353 | if ((reg_type == 'x') && (reg_num == 27)) { |
| 1354 | AppendToOutput("cp"); |
| 1355 | } else if ((reg_type == 'x') && (reg_num == 28)) { |
| 1356 | AppendToOutput("jssp"); |
| 1357 | } else if ((reg_type == 'x') && (reg_num == 29)) { |
| 1358 | AppendToOutput("fp"); |
| 1359 | } else if ((reg_type == 'x') && (reg_num == 30)) { |
| 1360 | AppendToOutput("lr"); |
| 1361 | } else { |
| 1362 | AppendToOutput("%c%d", reg_type, reg_num); |
| 1363 | } |
| 1364 | } else if (format[2] == 's') { |
| 1365 | // Disassemble w31/x31 as stack pointer wcsp/csp. |
| 1366 | AppendToOutput("%s", (reg_type == 'w') ? "wcsp" : "csp"); |
| 1367 | } else { |
| 1368 | // Disassemble w31/x31 as zero register wzr/xzr. |
| 1369 | AppendToOutput("%czr", reg_type); |
| 1370 | } |
| 1371 | |
| 1372 | return field_len; |
| 1373 | } |
| 1374 | |
| 1375 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1376 | int DisassemblingDecoder::SubstituteImmediateField(Instruction* instr, |
| 1377 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1378 | DCHECK(format[0] == 'I'); |
| 1379 | |
| 1380 | switch (format[1]) { |
| 1381 | case 'M': { // IMoveImm or IMoveLSL. |
| 1382 | if (format[5] == 'I') { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1383 | uint64_t imm = static_cast<uint64_t>(instr->ImmMoveWide()) |
| 1384 | << (16 * instr->ShiftMoveWide()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1385 | AppendToOutput("#0x%" PRIx64, imm); |
| 1386 | } else { |
| 1387 | DCHECK(format[5] == 'L'); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1388 | AppendToOutput("#0x%" PRIx32, instr->ImmMoveWide()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1389 | if (instr->ShiftMoveWide() > 0) { |
| 1390 | AppendToOutput(", lsl #%d", 16 * instr->ShiftMoveWide()); |
| 1391 | } |
| 1392 | } |
| 1393 | return 8; |
| 1394 | } |
| 1395 | case 'L': { |
| 1396 | switch (format[2]) { |
| 1397 | case 'L': { // ILLiteral - Immediate Load Literal. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1398 | AppendToOutput("pc%+" PRId32, instr->ImmLLiteral() |
| 1399 | << kLoadLiteralScaleLog2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1400 | return 9; |
| 1401 | } |
| 1402 | case 'S': { // ILS - Immediate Load/Store. |
| 1403 | if (instr->ImmLS() != 0) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1404 | AppendToOutput(", #%" PRId32, instr->ImmLS()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1405 | } |
| 1406 | return 3; |
| 1407 | } |
| 1408 | case 'P': { // ILPx - Immediate Load/Store Pair, x = access size. |
| 1409 | if (instr->ImmLSPair() != 0) { |
| 1410 | // format[3] is the scale value. Convert to a number. |
| 1411 | int scale = format[3] - 0x30; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1412 | AppendToOutput(", #%" PRId32, instr->ImmLSPair() * scale); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1413 | } |
| 1414 | return 4; |
| 1415 | } |
| 1416 | case 'U': { // ILU - Immediate Load/Store Unsigned. |
| 1417 | if (instr->ImmLSUnsigned() != 0) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1418 | AppendToOutput(", #%" PRId32, instr->ImmLSUnsigned() |
| 1419 | << instr->SizeLS()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1420 | } |
| 1421 | return 3; |
| 1422 | } |
| 1423 | } |
| 1424 | } |
| 1425 | case 'C': { // ICondB - Immediate Conditional Branch. |
| 1426 | int64_t offset = instr->ImmCondBranch() << 2; |
| 1427 | char sign = (offset >= 0) ? '+' : '-'; |
| 1428 | AppendToOutput("#%c0x%" PRIx64, sign, offset); |
| 1429 | return 6; |
| 1430 | } |
| 1431 | case 'A': { // IAddSub. |
| 1432 | DCHECK(instr->ShiftAddSub() <= 1); |
| 1433 | int64_t imm = instr->ImmAddSub() << (12 * instr->ShiftAddSub()); |
| 1434 | AppendToOutput("#0x%" PRIx64 " (%" PRId64 ")", imm, imm); |
| 1435 | return 7; |
| 1436 | } |
| 1437 | case 'F': { // IFPSingle, IFPDouble or IFPFBits. |
| 1438 | if (format[3] == 'F') { // IFPFBits. |
| 1439 | AppendToOutput("#%d", 64 - instr->FPScale()); |
| 1440 | return 8; |
| 1441 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1442 | AppendToOutput("#0x%" PRIx32 " (%.4f)", instr->ImmFP(), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1443 | format[3] == 'S' ? instr->ImmFP32() : instr->ImmFP64()); |
| 1444 | return 9; |
| 1445 | } |
| 1446 | } |
| 1447 | case 'T': { // ITri - Immediate Triangular Encoded. |
| 1448 | AppendToOutput("#0x%" PRIx64, instr->ImmLogical()); |
| 1449 | return 4; |
| 1450 | } |
| 1451 | case 'N': { // INzcv. |
| 1452 | int nzcv = (instr->Nzcv() << Flags_offset); |
| 1453 | AppendToOutput("#%c%c%c%c", ((nzcv & NFlag) == 0) ? 'n' : 'N', |
| 1454 | ((nzcv & ZFlag) == 0) ? 'z' : 'Z', |
| 1455 | ((nzcv & CFlag) == 0) ? 'c' : 'C', |
| 1456 | ((nzcv & VFlag) == 0) ? 'v' : 'V'); |
| 1457 | return 5; |
| 1458 | } |
| 1459 | case 'P': { // IP - Conditional compare. |
| 1460 | AppendToOutput("#%d", instr->ImmCondCmp()); |
| 1461 | return 2; |
| 1462 | } |
| 1463 | case 'B': { // Bitfields. |
| 1464 | return SubstituteBitfieldImmediateField(instr, format); |
| 1465 | } |
| 1466 | case 'E': { // IExtract. |
| 1467 | AppendToOutput("#%d", instr->ImmS()); |
| 1468 | return 8; |
| 1469 | } |
| 1470 | case 'S': { // IS - Test and branch bit. |
| 1471 | AppendToOutput("#%d", (instr->ImmTestBranchBit5() << 5) | |
| 1472 | instr->ImmTestBranchBit40()); |
| 1473 | return 2; |
| 1474 | } |
| 1475 | case 'D': { // IDebug - HLT and BRK instructions. |
| 1476 | AppendToOutput("#0x%x", instr->ImmException()); |
| 1477 | return 6; |
| 1478 | } |
| 1479 | default: { |
| 1480 | UNREACHABLE(); |
| 1481 | return 0; |
| 1482 | } |
| 1483 | } |
| 1484 | } |
| 1485 | |
| 1486 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1487 | int DisassemblingDecoder::SubstituteBitfieldImmediateField(Instruction* instr, |
| 1488 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1489 | DCHECK((format[0] == 'I') && (format[1] == 'B')); |
| 1490 | unsigned r = instr->ImmR(); |
| 1491 | unsigned s = instr->ImmS(); |
| 1492 | |
| 1493 | switch (format[2]) { |
| 1494 | case 'r': { // IBr. |
| 1495 | AppendToOutput("#%d", r); |
| 1496 | return 3; |
| 1497 | } |
| 1498 | case 's': { // IBs+1 or IBs-r+1. |
| 1499 | if (format[3] == '+') { |
| 1500 | AppendToOutput("#%d", s + 1); |
| 1501 | return 5; |
| 1502 | } else { |
| 1503 | DCHECK(format[3] == '-'); |
| 1504 | AppendToOutput("#%d", s - r + 1); |
| 1505 | return 7; |
| 1506 | } |
| 1507 | } |
| 1508 | case 'Z': { // IBZ-r. |
| 1509 | DCHECK((format[3] == '-') && (format[4] == 'r')); |
| 1510 | unsigned reg_size = (instr->SixtyFourBits() == 1) ? kXRegSizeInBits |
| 1511 | : kWRegSizeInBits; |
| 1512 | AppendToOutput("#%d", reg_size - r); |
| 1513 | return 5; |
| 1514 | } |
| 1515 | default: { |
| 1516 | UNREACHABLE(); |
| 1517 | return 0; |
| 1518 | } |
| 1519 | } |
| 1520 | } |
| 1521 | |
| 1522 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1523 | int DisassemblingDecoder::SubstituteLiteralField(Instruction* instr, |
| 1524 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1525 | DCHECK(strncmp(format, "LValue", 6) == 0); |
| 1526 | USE(format); |
| 1527 | |
| 1528 | switch (instr->Mask(LoadLiteralMask)) { |
| 1529 | case LDR_w_lit: |
| 1530 | case LDR_x_lit: |
| 1531 | case LDR_s_lit: |
| 1532 | case LDR_d_lit: |
| 1533 | AppendToOutput("(addr 0x%016" PRIxPTR ")", instr->LiteralAddress()); |
| 1534 | break; |
| 1535 | default: UNREACHABLE(); |
| 1536 | } |
| 1537 | |
| 1538 | return 6; |
| 1539 | } |
| 1540 | |
| 1541 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1542 | int DisassemblingDecoder::SubstituteShiftField(Instruction* instr, |
| 1543 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1544 | DCHECK(format[0] == 'H'); |
| 1545 | DCHECK(instr->ShiftDP() <= 0x3); |
| 1546 | |
| 1547 | switch (format[1]) { |
| 1548 | case 'D': { // HDP. |
| 1549 | DCHECK(instr->ShiftDP() != ROR); |
| 1550 | } // Fall through. |
| 1551 | case 'L': { // HLo. |
| 1552 | if (instr->ImmDPShift() != 0) { |
| 1553 | const char* shift_type[] = {"lsl", "lsr", "asr", "ror"}; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1554 | AppendToOutput(", %s #%" PRId32, shift_type[instr->ShiftDP()], |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1555 | instr->ImmDPShift()); |
| 1556 | } |
| 1557 | return 3; |
| 1558 | } |
| 1559 | default: |
| 1560 | UNREACHABLE(); |
| 1561 | return 0; |
| 1562 | } |
| 1563 | } |
| 1564 | |
| 1565 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1566 | int DisassemblingDecoder::SubstituteConditionField(Instruction* instr, |
| 1567 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1568 | DCHECK(format[0] == 'C'); |
| 1569 | const char* condition_code[] = { "eq", "ne", "hs", "lo", |
| 1570 | "mi", "pl", "vs", "vc", |
| 1571 | "hi", "ls", "ge", "lt", |
| 1572 | "gt", "le", "al", "nv" }; |
| 1573 | int cond; |
| 1574 | switch (format[1]) { |
| 1575 | case 'B': cond = instr->ConditionBranch(); break; |
| 1576 | case 'I': { |
| 1577 | cond = NegateCondition(static_cast<Condition>(instr->Condition())); |
| 1578 | break; |
| 1579 | } |
| 1580 | default: cond = instr->Condition(); |
| 1581 | } |
| 1582 | AppendToOutput("%s", condition_code[cond]); |
| 1583 | return 4; |
| 1584 | } |
| 1585 | |
| 1586 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1587 | int DisassemblingDecoder::SubstitutePCRelAddressField(Instruction* instr, |
| 1588 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1589 | USE(format); |
| 1590 | DCHECK(strncmp(format, "AddrPCRel", 9) == 0); |
| 1591 | |
| 1592 | int offset = instr->ImmPCRel(); |
| 1593 | |
| 1594 | // Only ADR (AddrPCRelByte) is supported. |
| 1595 | DCHECK(strcmp(format, "AddrPCRelByte") == 0); |
| 1596 | |
| 1597 | char sign = '+'; |
| 1598 | if (offset < 0) { |
| 1599 | offset = -offset; |
| 1600 | sign = '-'; |
| 1601 | } |
| 1602 | AppendToOutput("#%c0x%x (addr %p)", sign, offset, |
| 1603 | instr->InstructionAtOffset(offset, Instruction::NO_CHECK)); |
| 1604 | return 13; |
| 1605 | } |
| 1606 | |
| 1607 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1608 | int DisassemblingDecoder::SubstituteBranchTargetField(Instruction* instr, |
| 1609 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1610 | DCHECK(strncmp(format, "BImm", 4) == 0); |
| 1611 | |
| 1612 | int64_t offset = 0; |
| 1613 | switch (format[5]) { |
| 1614 | // BImmUncn - unconditional branch immediate. |
| 1615 | case 'n': offset = instr->ImmUncondBranch(); break; |
| 1616 | // BImmCond - conditional branch immediate. |
| 1617 | case 'o': offset = instr->ImmCondBranch(); break; |
| 1618 | // BImmCmpa - compare and branch immediate. |
| 1619 | case 'm': offset = instr->ImmCmpBranch(); break; |
| 1620 | // BImmTest - test and branch immediate. |
| 1621 | case 'e': offset = instr->ImmTestBranch(); break; |
| 1622 | default: UNREACHABLE(); |
| 1623 | } |
| 1624 | offset <<= kInstructionSizeLog2; |
| 1625 | char sign = '+'; |
| 1626 | if (offset < 0) { |
| 1627 | sign = '-'; |
| 1628 | } |
| 1629 | AppendToOutput("#%c0x%" PRIx64 " (addr %p)", sign, Abs(offset), |
| 1630 | instr->InstructionAtOffset(offset), Instruction::NO_CHECK); |
| 1631 | return 8; |
| 1632 | } |
| 1633 | |
| 1634 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1635 | int DisassemblingDecoder::SubstituteExtendField(Instruction* instr, |
| 1636 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1637 | DCHECK(strncmp(format, "Ext", 3) == 0); |
| 1638 | DCHECK(instr->ExtendMode() <= 7); |
| 1639 | USE(format); |
| 1640 | |
| 1641 | const char* extend_mode[] = { "uxtb", "uxth", "uxtw", "uxtx", |
| 1642 | "sxtb", "sxth", "sxtw", "sxtx" }; |
| 1643 | |
| 1644 | // If rd or rn is SP, uxtw on 32-bit registers and uxtx on 64-bit |
| 1645 | // registers becomes lsl. |
| 1646 | if (((instr->Rd() == kZeroRegCode) || (instr->Rn() == kZeroRegCode)) && |
| 1647 | (((instr->ExtendMode() == UXTW) && (instr->SixtyFourBits() == 0)) || |
| 1648 | (instr->ExtendMode() == UXTX))) { |
| 1649 | if (instr->ImmExtendShift() > 0) { |
| 1650 | AppendToOutput(", lsl #%d", instr->ImmExtendShift()); |
| 1651 | } |
| 1652 | } else { |
| 1653 | AppendToOutput(", %s", extend_mode[instr->ExtendMode()]); |
| 1654 | if (instr->ImmExtendShift() > 0) { |
| 1655 | AppendToOutput(" #%d", instr->ImmExtendShift()); |
| 1656 | } |
| 1657 | } |
| 1658 | return 3; |
| 1659 | } |
| 1660 | |
| 1661 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1662 | int DisassemblingDecoder::SubstituteLSRegOffsetField(Instruction* instr, |
| 1663 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1664 | DCHECK(strncmp(format, "Offsetreg", 9) == 0); |
| 1665 | const char* extend_mode[] = { "undefined", "undefined", "uxtw", "lsl", |
| 1666 | "undefined", "undefined", "sxtw", "sxtx" }; |
| 1667 | USE(format); |
| 1668 | |
| 1669 | unsigned shift = instr->ImmShiftLS(); |
| 1670 | Extend ext = static_cast<Extend>(instr->ExtendMode()); |
| 1671 | char reg_type = ((ext == UXTW) || (ext == SXTW)) ? 'w' : 'x'; |
| 1672 | |
| 1673 | unsigned rm = instr->Rm(); |
| 1674 | if (rm == kZeroRegCode) { |
| 1675 | AppendToOutput("%czr", reg_type); |
| 1676 | } else { |
| 1677 | AppendToOutput("%c%d", reg_type, rm); |
| 1678 | } |
| 1679 | |
| 1680 | // Extend mode UXTX is an alias for shift mode LSL here. |
| 1681 | if (!((ext == UXTX) && (shift == 0))) { |
| 1682 | AppendToOutput(", %s", extend_mode[ext]); |
| 1683 | if (shift != 0) { |
| 1684 | AppendToOutput(" #%d", instr->SizeLS()); |
| 1685 | } |
| 1686 | } |
| 1687 | return 9; |
| 1688 | } |
| 1689 | |
| 1690 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1691 | int DisassemblingDecoder::SubstitutePrefetchField(Instruction* instr, |
| 1692 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1693 | DCHECK(format[0] == 'P'); |
| 1694 | USE(format); |
| 1695 | |
| 1696 | int prefetch_mode = instr->PrefetchMode(); |
| 1697 | |
| 1698 | const char* ls = (prefetch_mode & 0x10) ? "st" : "ld"; |
| 1699 | int level = (prefetch_mode >> 1) + 1; |
| 1700 | const char* ks = (prefetch_mode & 1) ? "strm" : "keep"; |
| 1701 | |
| 1702 | AppendToOutput("p%sl%d%s", ls, level, ks); |
| 1703 | return 6; |
| 1704 | } |
| 1705 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1706 | int DisassemblingDecoder::SubstituteBarrierField(Instruction* instr, |
| 1707 | const char* format) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1708 | DCHECK(format[0] == 'M'); |
| 1709 | USE(format); |
| 1710 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1711 | static const char* const options[4][4] = { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1712 | { "sy (0b0000)", "oshld", "oshst", "osh" }, |
| 1713 | { "sy (0b0100)", "nshld", "nshst", "nsh" }, |
| 1714 | { "sy (0b1000)", "ishld", "ishst", "ish" }, |
| 1715 | { "sy (0b1100)", "ld", "st", "sy" } |
| 1716 | }; |
| 1717 | int domain = instr->ImmBarrierDomain(); |
| 1718 | int type = instr->ImmBarrierType(); |
| 1719 | |
| 1720 | AppendToOutput("%s", options[domain][type]); |
| 1721 | return 1; |
| 1722 | } |
| 1723 | |
| 1724 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1725 | void DisassemblingDecoder::ResetOutput() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1726 | buffer_pos_ = 0; |
| 1727 | buffer_[buffer_pos_] = 0; |
| 1728 | } |
| 1729 | |
| 1730 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1731 | void DisassemblingDecoder::AppendToOutput(const char* format, ...) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1732 | va_list args; |
| 1733 | va_start(args, format); |
| 1734 | buffer_pos_ += vsnprintf(&buffer_[buffer_pos_], buffer_size_, format, args); |
| 1735 | va_end(args); |
| 1736 | } |
| 1737 | |
| 1738 | |
| 1739 | void PrintDisassembler::ProcessOutput(Instruction* instr) { |
| 1740 | fprintf(stream_, "0x%016" PRIx64 " %08" PRIx32 "\t\t%s\n", |
| 1741 | reinterpret_cast<uint64_t>(instr), instr->InstructionBits(), |
| 1742 | GetOutput()); |
| 1743 | } |
| 1744 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1745 | } // namespace internal |
| 1746 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1747 | |
| 1748 | |
| 1749 | namespace disasm { |
| 1750 | |
| 1751 | |
| 1752 | const char* NameConverter::NameOfAddress(byte* addr) const { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1753 | v8::internal::SNPrintF(tmp_buffer_, "%p", static_cast<void *>(addr)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1754 | return tmp_buffer_.start(); |
| 1755 | } |
| 1756 | |
| 1757 | |
| 1758 | const char* NameConverter::NameOfConstant(byte* addr) const { |
| 1759 | return NameOfAddress(addr); |
| 1760 | } |
| 1761 | |
| 1762 | |
| 1763 | const char* NameConverter::NameOfCPURegister(int reg) const { |
| 1764 | unsigned ureg = reg; // Avoid warnings about signed/unsigned comparisons. |
| 1765 | if (ureg >= v8::internal::kNumberOfRegisters) { |
| 1766 | return "noreg"; |
| 1767 | } |
| 1768 | if (ureg == v8::internal::kZeroRegCode) { |
| 1769 | return "xzr"; |
| 1770 | } |
| 1771 | v8::internal::SNPrintF(tmp_buffer_, "x%u", ureg); |
| 1772 | return tmp_buffer_.start(); |
| 1773 | } |
| 1774 | |
| 1775 | |
| 1776 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
| 1777 | UNREACHABLE(); // ARM64 does not have the concept of a byte register |
| 1778 | return "nobytereg"; |
| 1779 | } |
| 1780 | |
| 1781 | |
| 1782 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
| 1783 | UNREACHABLE(); // ARM64 does not have any XMM registers |
| 1784 | return "noxmmreg"; |
| 1785 | } |
| 1786 | |
| 1787 | |
| 1788 | const char* NameConverter::NameInCode(byte* addr) const { |
| 1789 | // The default name converter is called for unknown code, so we will not try |
| 1790 | // to access any memory. |
| 1791 | return ""; |
| 1792 | } |
| 1793 | |
| 1794 | |
| 1795 | //------------------------------------------------------------------------------ |
| 1796 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1797 | class BufferDisassembler : public v8::internal::DisassemblingDecoder { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1798 | public: |
| 1799 | explicit BufferDisassembler(v8::internal::Vector<char> out_buffer) |
| 1800 | : out_buffer_(out_buffer) { } |
| 1801 | |
| 1802 | ~BufferDisassembler() { } |
| 1803 | |
| 1804 | virtual void ProcessOutput(v8::internal::Instruction* instr) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1805 | v8::internal::SNPrintF(out_buffer_, "%08" PRIx32 " %s", |
| 1806 | instr->InstructionBits(), GetOutput()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1807 | } |
| 1808 | |
| 1809 | private: |
| 1810 | v8::internal::Vector<char> out_buffer_; |
| 1811 | }; |
| 1812 | |
| 1813 | Disassembler::Disassembler(const NameConverter& converter) |
| 1814 | : converter_(converter) {} |
| 1815 | |
| 1816 | |
| 1817 | Disassembler::~Disassembler() { USE(converter_); } |
| 1818 | |
| 1819 | |
| 1820 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
| 1821 | byte* instr) { |
| 1822 | v8::internal::Decoder<v8::internal::DispatchingDecoderVisitor> decoder; |
| 1823 | BufferDisassembler disasm(buffer); |
| 1824 | decoder.AppendVisitor(&disasm); |
| 1825 | |
| 1826 | decoder.Decode(reinterpret_cast<v8::internal::Instruction*>(instr)); |
| 1827 | return v8::internal::kInstructionSize; |
| 1828 | } |
| 1829 | |
| 1830 | |
| 1831 | int Disassembler::ConstantPoolSizeAt(byte* instr) { |
| 1832 | return v8::internal::Assembler::ConstantPoolSizeAt( |
| 1833 | reinterpret_cast<v8::internal::Instruction*>(instr)); |
| 1834 | } |
| 1835 | |
| 1836 | |
| 1837 | void Disassembler::Disassemble(FILE* file, byte* start, byte* end) { |
| 1838 | v8::internal::Decoder<v8::internal::DispatchingDecoderVisitor> decoder; |
| 1839 | v8::internal::PrintDisassembler disasm(file); |
| 1840 | decoder.AppendVisitor(&disasm); |
| 1841 | |
| 1842 | for (byte* pc = start; pc < end; pc += v8::internal::kInstructionSize) { |
| 1843 | decoder.Decode(reinterpret_cast<v8::internal::Instruction*>(pc)); |
| 1844 | } |
| 1845 | } |
| 1846 | |
| 1847 | } // namespace disasm |
| 1848 | |
| 1849 | #endif // V8_TARGET_ARCH_ARM64 |