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| 1 // Copyright 2014 the V8 project authors. All rights reserved. | |
| 2 // Redistribution and use in source and binary forms, with or without | |
| 3 // modification, are permitted provided that the following conditions are | |
| 4 // met: | |
| 5 // | |
| 6 // * Redistributions of source code must retain the above copyright | |
| 7 // notice, this list of conditions and the following disclaimer. | |
| 8 // * Redistributions in binary form must reproduce the above | |
| 9 // copyright notice, this list of conditions and the following | |
| 10 // disclaimer in the documentation and/or other materials provided | |
| 11 // with the distribution. | |
| 12 // * Neither the name of Google Inc. nor the names of its | |
| 13 // contributors may be used to endorse or promote products derived | |
| 14 // from this software without specific prior written permission. | |
| 15 // | |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | |
| 28 #ifndef V8_A64_DECODER_A64_INL_H_ | |
| 29 #define V8_A64_DECODER_A64_INL_H_ | |
| 30 | |
| 31 #include "a64/decoder-a64.h" | |
| 32 #include "globals.h" | |
| 33 #include "utils.h" | |
| 34 | |
| 35 | |
| 36 namespace v8 { | |
| 37 namespace internal { | |
| 38 | |
| 39 | |
| 40 // Top-level instruction decode function. | |
| 41 template<typename V> | |
| 42 void Decoder<V>::Decode(Instruction *instr) { | |
| 43 if (instr->Bits(28, 27) == 0) { | |
| 44 V::VisitUnallocated(instr); | |
| 45 } else { | |
| 46 switch (instr->Bits(27, 24)) { | |
| 47 // 0: PC relative addressing. | |
| 48 case 0x0: DecodePCRelAddressing(instr); break; | |
| 49 | |
| 50 // 1: Add/sub immediate. | |
| 51 case 0x1: DecodeAddSubImmediate(instr); break; | |
| 52 | |
| 53 // A: Logical shifted register. | |
| 54 // Add/sub with carry. | |
| 55 // Conditional compare register. | |
| 56 // Conditional compare immediate. | |
| 57 // Conditional select. | |
| 58 // Data processing 1 source. | |
| 59 // Data processing 2 source. | |
| 60 // B: Add/sub shifted register. | |
| 61 // Add/sub extended register. | |
| 62 // Data processing 3 source. | |
| 63 case 0xA: | |
| 64 case 0xB: DecodeDataProcessing(instr); break; | |
| 65 | |
| 66 // 2: Logical immediate. | |
| 67 // Move wide immediate. | |
| 68 case 0x2: DecodeLogical(instr); break; | |
| 69 | |
| 70 // 3: Bitfield. | |
| 71 // Extract. | |
| 72 case 0x3: DecodeBitfieldExtract(instr); break; | |
| 73 | |
| 74 // 4: Unconditional branch immediate. | |
| 75 // Exception generation. | |
| 76 // Compare and branch immediate. | |
| 77 // 5: Compare and branch immediate. | |
| 78 // Conditional branch. | |
| 79 // System. | |
| 80 // 6,7: Unconditional branch. | |
| 81 // Test and branch immediate. | |
| 82 case 0x4: | |
| 83 case 0x5: | |
| 84 case 0x6: | |
| 85 case 0x7: DecodeBranchSystemException(instr); break; | |
| 86 | |
| 87 // 8,9: Load/store register pair post-index. | |
| 88 // Load register literal. | |
| 89 // Load/store register unscaled immediate. | |
| 90 // Load/store register immediate post-index. | |
| 91 // Load/store register immediate pre-index. | |
| 92 // Load/store register offset. | |
| 93 // C,D: Load/store register pair offset. | |
| 94 // Load/store register pair pre-index. | |
| 95 // Load/store register unsigned immediate. | |
| 96 // Advanced SIMD. | |
| 97 case 0x8: | |
| 98 case 0x9: | |
| 99 case 0xC: | |
| 100 case 0xD: DecodeLoadStore(instr); break; | |
| 101 | |
| 102 // E: FP fixed point conversion. | |
| 103 // FP integer conversion. | |
| 104 // FP data processing 1 source. | |
| 105 // FP compare. | |
| 106 // FP immediate. | |
| 107 // FP data processing 2 source. | |
| 108 // FP conditional compare. | |
| 109 // FP conditional select. | |
| 110 // Advanced SIMD. | |
| 111 // F: FP data processing 3 source. | |
| 112 // Advanced SIMD. | |
| 113 case 0xE: | |
| 114 case 0xF: DecodeFP(instr); break; | |
| 115 } | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 | |
| 120 template<typename V> | |
| 121 void Decoder<V>::DecodePCRelAddressing(Instruction* instr) { | |
| 122 ASSERT(instr->Bits(27, 24) == 0x0); | |
| 123 // We know bit 28 is set, as <b28:b27> = 0 is filtered out at the top level | |
| 124 // decode. | |
| 125 ASSERT(instr->Bit(28) == 0x1); | |
| 126 V::VisitPCRelAddressing(instr); | |
| 127 } | |
| 128 | |
| 129 | |
| 130 template<typename V> | |
| 131 void Decoder<V>::DecodeBranchSystemException(Instruction* instr) { | |
| 132 ASSERT((instr->Bits(27, 24) == 0x4) || | |
| 133 (instr->Bits(27, 24) == 0x5) || | |
| 134 (instr->Bits(27, 24) == 0x6) || | |
| 135 (instr->Bits(27, 24) == 0x7) ); | |
| 136 | |
| 137 switch (instr->Bits(31, 29)) { | |
| 138 case 0: | |
| 139 case 4: { | |
| 140 V::VisitUnconditionalBranch(instr); | |
| 141 break; | |
| 142 } | |
| 143 case 1: | |
| 144 case 5: { | |
| 145 if (instr->Bit(25) == 0) { | |
| 146 V::VisitCompareBranch(instr); | |
| 147 } else { | |
| 148 V::VisitTestBranch(instr); | |
| 149 } | |
| 150 break; | |
| 151 } | |
| 152 case 2: { | |
| 153 if (instr->Bit(25) == 0) { | |
| 154 if ((instr->Bit(24) == 0x1) || | |
| 155 (instr->Mask(0x01000010) == 0x00000010)) { | |
| 156 V::VisitUnallocated(instr); | |
| 157 } else { | |
| 158 V::VisitConditionalBranch(instr); | |
| 159 } | |
| 160 } else { | |
| 161 V::VisitUnallocated(instr); | |
| 162 } | |
| 163 break; | |
| 164 } | |
| 165 case 6: { | |
| 166 if (instr->Bit(25) == 0) { | |
| 167 if (instr->Bit(24) == 0) { | |
| 168 if ((instr->Bits(4, 2) != 0) || | |
| 169 (instr->Mask(0x00E0001D) == 0x00200001) || | |
| 170 (instr->Mask(0x00E0001D) == 0x00400001) || | |
| 171 (instr->Mask(0x00E0001E) == 0x00200002) || | |
| 172 (instr->Mask(0x00E0001E) == 0x00400002) || | |
| 173 (instr->Mask(0x00E0001C) == 0x00600000) || | |
| 174 (instr->Mask(0x00E0001C) == 0x00800000) || | |
| 175 (instr->Mask(0x00E0001F) == 0x00A00000) || | |
| 176 (instr->Mask(0x00C0001C) == 0x00C00000)) { | |
| 177 V::VisitUnallocated(instr); | |
| 178 } else { | |
| 179 V::VisitException(instr); | |
| 180 } | |
| 181 } else { | |
| 182 if (instr->Bits(23, 22) == 0) { | |
| 183 const Instr masked_003FF0E0 = instr->Mask(0x003FF0E0); | |
| 184 if ((instr->Bits(21, 19) == 0x4) || | |
| 185 (masked_003FF0E0 == 0x00033000) || | |
| 186 (masked_003FF0E0 == 0x003FF020) || | |
| 187 (masked_003FF0E0 == 0x003FF060) || | |
| 188 (masked_003FF0E0 == 0x003FF0E0) || | |
| 189 (instr->Mask(0x00388000) == 0x00008000) || | |
| 190 (instr->Mask(0x0038E000) == 0x00000000) || | |
| 191 (instr->Mask(0x0039E000) == 0x00002000) || | |
| 192 (instr->Mask(0x003AE000) == 0x00002000) || | |
| 193 (instr->Mask(0x003CE000) == 0x00042000) || | |
| 194 (instr->Mask(0x003FFFC0) == 0x000320C0) || | |
| 195 (instr->Mask(0x003FF100) == 0x00032100) || | |
| 196 (instr->Mask(0x003FF200) == 0x00032200) || | |
| 197 (instr->Mask(0x003FF400) == 0x00032400) || | |
| 198 (instr->Mask(0x003FF800) == 0x00032800) || | |
| 199 (instr->Mask(0x0038F000) == 0x00005000) || | |
| 200 (instr->Mask(0x0038E000) == 0x00006000)) { | |
| 201 V::VisitUnallocated(instr); | |
| 202 } else { | |
| 203 V::VisitSystem(instr); | |
| 204 } | |
| 205 } else { | |
| 206 V::VisitUnallocated(instr); | |
| 207 } | |
| 208 } | |
| 209 } else { | |
| 210 if ((instr->Bit(24) == 0x1) || | |
| 211 (instr->Bits(20, 16) != 0x1F) || | |
| 212 (instr->Bits(15, 10) != 0) || | |
| 213 (instr->Bits(4, 0) != 0) || | |
| 214 (instr->Bits(24, 21) == 0x3) || | |
| 215 (instr->Bits(24, 22) == 0x3)) { | |
| 216 V::VisitUnallocated(instr); | |
| 217 } else { | |
| 218 V::VisitUnconditionalBranchToRegister(instr); | |
| 219 } | |
| 220 } | |
| 221 break; | |
| 222 } | |
| 223 case 3: | |
| 224 case 7: { | |
| 225 V::VisitUnallocated(instr); | |
| 226 break; | |
| 227 } | |
| 228 } | |
| 229 } | |
| 230 | |
| 231 | |
| 232 template<typename V> | |
| 233 void Decoder<V>::DecodeLoadStore(Instruction* instr) { | |
| 234 ASSERT((instr->Bits(27, 24) == 0x8) || | |
| 235 (instr->Bits(27, 24) == 0x9) || | |
| 236 (instr->Bits(27, 24) == 0xC) || | |
| 237 (instr->Bits(27, 24) == 0xD) ); | |
| 238 | |
| 239 if (instr->Bit(24) == 0) { | |
| 240 if (instr->Bit(28) == 0) { | |
| 241 if (instr->Bit(29) == 0) { | |
| 242 if (instr->Bit(26) == 0) { | |
| 243 // TODO(all): VisitLoadStoreExclusive. | |
| 244 V::VisitUnimplemented(instr); | |
| 245 } else { | |
| 246 DecodeAdvSIMDLoadStore(instr); | |
| 247 } | |
| 248 } else { | |
| 249 if ((instr->Bits(31, 30) == 0x3) || | |
| 250 (instr->Mask(0xC4400000) == 0x40000000)) { | |
| 251 V::VisitUnallocated(instr); | |
| 252 } else { | |
| 253 if (instr->Bit(23) == 0) { | |
| 254 if (instr->Mask(0xC4400000) == 0xC0400000) { | |
| 255 V::VisitUnallocated(instr); | |
| 256 } else { | |
| 257 V::VisitLoadStorePairNonTemporal(instr); | |
| 258 } | |
| 259 } else { | |
| 260 V::VisitLoadStorePairPostIndex(instr); | |
| 261 } | |
| 262 } | |
| 263 } | |
| 264 } else { | |
| 265 if (instr->Bit(29) == 0) { | |
| 266 if (instr->Mask(0xC4000000) == 0xC4000000) { | |
| 267 V::VisitUnallocated(instr); | |
| 268 } else { | |
| 269 V::VisitLoadLiteral(instr); | |
| 270 } | |
| 271 } else { | |
| 272 if ((instr->Mask(0x84C00000) == 0x80C00000) || | |
| 273 (instr->Mask(0x44800000) == 0x44800000) || | |
| 274 (instr->Mask(0x84800000) == 0x84800000)) { | |
| 275 V::VisitUnallocated(instr); | |
| 276 } else { | |
| 277 if (instr->Bit(21) == 0) { | |
| 278 switch (instr->Bits(11, 10)) { | |
| 279 case 0: { | |
| 280 V::VisitLoadStoreUnscaledOffset(instr); | |
| 281 break; | |
| 282 } | |
| 283 case 1: { | |
| 284 if (instr->Mask(0xC4C00000) == 0xC0800000) { | |
| 285 V::VisitUnallocated(instr); | |
| 286 } else { | |
| 287 V::VisitLoadStorePostIndex(instr); | |
| 288 } | |
| 289 break; | |
| 290 } | |
| 291 case 2: { | |
| 292 // TODO(all): VisitLoadStoreRegisterOffsetUnpriv. | |
| 293 V::VisitUnimplemented(instr); | |
| 294 break; | |
| 295 } | |
| 296 case 3: { | |
| 297 if (instr->Mask(0xC4C00000) == 0xC0800000) { | |
| 298 V::VisitUnallocated(instr); | |
| 299 } else { | |
| 300 V::VisitLoadStorePreIndex(instr); | |
| 301 } | |
| 302 break; | |
| 303 } | |
| 304 } | |
| 305 } else { | |
| 306 if (instr->Bits(11, 10) == 0x2) { | |
| 307 if (instr->Bit(14) == 0) { | |
| 308 V::VisitUnallocated(instr); | |
| 309 } else { | |
| 310 V::VisitLoadStoreRegisterOffset(instr); | |
| 311 } | |
| 312 } else { | |
| 313 V::VisitUnallocated(instr); | |
| 314 } | |
| 315 } | |
| 316 } | |
| 317 } | |
| 318 } | |
| 319 } else { | |
| 320 if (instr->Bit(28) == 0) { | |
| 321 if (instr->Bit(29) == 0) { | |
| 322 V::VisitUnallocated(instr); | |
| 323 } else { | |
| 324 if ((instr->Bits(31, 30) == 0x3) || | |
| 325 (instr->Mask(0xC4400000) == 0x40000000)) { | |
| 326 V::VisitUnallocated(instr); | |
| 327 } else { | |
| 328 if (instr->Bit(23) == 0) { | |
| 329 V::VisitLoadStorePairOffset(instr); | |
| 330 } else { | |
| 331 V::VisitLoadStorePairPreIndex(instr); | |
| 332 } | |
| 333 } | |
| 334 } | |
| 335 } else { | |
| 336 if (instr->Bit(29) == 0) { | |
| 337 V::VisitUnallocated(instr); | |
| 338 } else { | |
| 339 if ((instr->Mask(0x84C00000) == 0x80C00000) || | |
| 340 (instr->Mask(0x44800000) == 0x44800000) || | |
| 341 (instr->Mask(0x84800000) == 0x84800000)) { | |
| 342 V::VisitUnallocated(instr); | |
| 343 } else { | |
| 344 V::VisitLoadStoreUnsignedOffset(instr); | |
| 345 } | |
| 346 } | |
| 347 } | |
| 348 } | |
| 349 } | |
| 350 | |
| 351 | |
| 352 template<typename V> | |
| 353 void Decoder<V>::DecodeLogical(Instruction* instr) { | |
| 354 ASSERT(instr->Bits(27, 24) == 0x2); | |
| 355 | |
| 356 if (instr->Mask(0x80400000) == 0x00400000) { | |
| 357 V::VisitUnallocated(instr); | |
| 358 } else { | |
| 359 if (instr->Bit(23) == 0) { | |
| 360 V::VisitLogicalImmediate(instr); | |
| 361 } else { | |
| 362 if (instr->Bits(30, 29) == 0x1) { | |
| 363 V::VisitUnallocated(instr); | |
| 364 } else { | |
| 365 V::VisitMoveWideImmediate(instr); | |
| 366 } | |
| 367 } | |
| 368 } | |
| 369 } | |
| 370 | |
| 371 | |
| 372 template<typename V> | |
| 373 void Decoder<V>::DecodeBitfieldExtract(Instruction* instr) { | |
| 374 ASSERT(instr->Bits(27, 24) == 0x3); | |
| 375 | |
| 376 if ((instr->Mask(0x80400000) == 0x80000000) || | |
| 377 (instr->Mask(0x80400000) == 0x00400000) || | |
| 378 (instr->Mask(0x80008000) == 0x00008000)) { | |
| 379 V::VisitUnallocated(instr); | |
| 380 } else if (instr->Bit(23) == 0) { | |
| 381 if ((instr->Mask(0x80200000) == 0x00200000) || | |
| 382 (instr->Mask(0x60000000) == 0x60000000)) { | |
| 383 V::VisitUnallocated(instr); | |
| 384 } else { | |
| 385 V::VisitBitfield(instr); | |
| 386 } | |
| 387 } else { | |
| 388 if ((instr->Mask(0x60200000) == 0x00200000) || | |
| 389 (instr->Mask(0x60000000) != 0x00000000)) { | |
| 390 V::VisitUnallocated(instr); | |
| 391 } else { | |
| 392 V::VisitExtract(instr); | |
| 393 } | |
| 394 } | |
| 395 } | |
| 396 | |
| 397 | |
| 398 template<typename V> | |
| 399 void Decoder<V>::DecodeAddSubImmediate(Instruction* instr) { | |
| 400 ASSERT(instr->Bits(27, 24) == 0x1); | |
| 401 if (instr->Bit(23) == 1) { | |
| 402 V::VisitUnallocated(instr); | |
| 403 } else { | |
| 404 V::VisitAddSubImmediate(instr); | |
| 405 } | |
| 406 } | |
| 407 | |
| 408 | |
| 409 template<typename V> | |
| 410 void Decoder<V>::DecodeDataProcessing(Instruction* instr) { | |
| 411 ASSERT((instr->Bits(27, 24) == 0xA) || | |
| 412 (instr->Bits(27, 24) == 0xB) ); | |
| 413 | |
| 414 if (instr->Bit(24) == 0) { | |
| 415 if (instr->Bit(28) == 0) { | |
| 416 if (instr->Mask(0x80008000) == 0x00008000) { | |
| 417 V::VisitUnallocated(instr); | |
| 418 } else { | |
| 419 V::VisitLogicalShifted(instr); | |
| 420 } | |
| 421 } else { | |
| 422 switch (instr->Bits(23, 21)) { | |
| 423 case 0: { | |
| 424 if (instr->Mask(0x0000FC00) != 0) { | |
| 425 V::VisitUnallocated(instr); | |
| 426 } else { | |
| 427 V::VisitAddSubWithCarry(instr); | |
| 428 } | |
| 429 break; | |
| 430 } | |
| 431 case 2: { | |
| 432 if ((instr->Bit(29) == 0) || | |
| 433 (instr->Mask(0x00000410) != 0)) { | |
| 434 V::VisitUnallocated(instr); | |
| 435 } else { | |
| 436 if (instr->Bit(11) == 0) { | |
| 437 V::VisitConditionalCompareRegister(instr); | |
| 438 } else { | |
| 439 V::VisitConditionalCompareImmediate(instr); | |
| 440 } | |
| 441 } | |
| 442 break; | |
| 443 } | |
| 444 case 4: { | |
| 445 if (instr->Mask(0x20000800) != 0x00000000) { | |
| 446 V::VisitUnallocated(instr); | |
| 447 } else { | |
| 448 V::VisitConditionalSelect(instr); | |
| 449 } | |
| 450 break; | |
| 451 } | |
| 452 case 6: { | |
| 453 if (instr->Bit(29) == 0x1) { | |
| 454 V::VisitUnallocated(instr); | |
| 455 } else { | |
| 456 if (instr->Bit(30) == 0) { | |
| 457 if ((instr->Bit(15) == 0x1) || | |
| 458 (instr->Bits(15, 11) == 0) || | |
| 459 (instr->Bits(15, 12) == 0x1) || | |
| 460 (instr->Bits(15, 12) == 0x3) || | |
| 461 (instr->Bits(15, 13) == 0x3) || | |
| 462 (instr->Mask(0x8000EC00) == 0x00004C00) || | |
| 463 (instr->Mask(0x8000E800) == 0x80004000) || | |
| 464 (instr->Mask(0x8000E400) == 0x80004000)) { | |
| 465 V::VisitUnallocated(instr); | |
| 466 } else { | |
| 467 V::VisitDataProcessing2Source(instr); | |
| 468 } | |
| 469 } else { | |
| 470 if ((instr->Bit(13) == 1) || | |
| 471 (instr->Bits(20, 16) != 0) || | |
| 472 (instr->Bits(15, 14) != 0) || | |
| 473 (instr->Mask(0xA01FFC00) == 0x00000C00) || | |
| 474 (instr->Mask(0x201FF800) == 0x00001800)) { | |
| 475 V::VisitUnallocated(instr); | |
| 476 } else { | |
| 477 V::VisitDataProcessing1Source(instr); | |
| 478 } | |
| 479 } | |
| 480 break; | |
| 481 } | |
| 482 } | |
| 483 case 1: | |
| 484 case 3: | |
| 485 case 5: | |
| 486 case 7: V::VisitUnallocated(instr); break; | |
| 487 } | |
| 488 } | |
| 489 } else { | |
| 490 if (instr->Bit(28) == 0) { | |
| 491 if (instr->Bit(21) == 0) { | |
| 492 if ((instr->Bits(23, 22) == 0x3) || | |
| 493 (instr->Mask(0x80008000) == 0x00008000)) { | |
| 494 V::VisitUnallocated(instr); | |
| 495 } else { | |
| 496 V::VisitAddSubShifted(instr); | |
| 497 } | |
| 498 } else { | |
| 499 if ((instr->Mask(0x00C00000) != 0x00000000) || | |
| 500 (instr->Mask(0x00001400) == 0x00001400) || | |
| 501 (instr->Mask(0x00001800) == 0x00001800)) { | |
| 502 V::VisitUnallocated(instr); | |
| 503 } else { | |
| 504 V::VisitAddSubExtended(instr); | |
| 505 } | |
| 506 } | |
| 507 } else { | |
| 508 if ((instr->Bit(30) == 0x1) || | |
| 509 (instr->Bits(30, 29) == 0x1) || | |
| 510 (instr->Mask(0xE0600000) == 0x00200000) || | |
| 511 (instr->Mask(0xE0608000) == 0x00400000) || | |
| 512 (instr->Mask(0x60608000) == 0x00408000) || | |
| 513 (instr->Mask(0x60E00000) == 0x00E00000) || | |
| 514 (instr->Mask(0x60E00000) == 0x00800000) || | |
| 515 (instr->Mask(0x60E00000) == 0x00600000)) { | |
| 516 V::VisitUnallocated(instr); | |
| 517 } else { | |
| 518 V::VisitDataProcessing3Source(instr); | |
| 519 } | |
| 520 } | |
| 521 } | |
| 522 } | |
| 523 | |
| 524 | |
| 525 template<typename V> | |
| 526 void Decoder<V>::DecodeFP(Instruction* instr) { | |
| 527 ASSERT((instr->Bits(27, 24) == 0xE) || | |
| 528 (instr->Bits(27, 24) == 0xF) ); | |
| 529 | |
| 530 if (instr->Bit(28) == 0) { | |
| 531 DecodeAdvSIMDDataProcessing(instr); | |
| 532 } else { | |
| 533 if (instr->Bit(29) == 1) { | |
| 534 V::VisitUnallocated(instr); | |
| 535 } else { | |
| 536 if (instr->Bits(31, 30) == 0x3) { | |
| 537 V::VisitUnallocated(instr); | |
| 538 } else if (instr->Bits(31, 30) == 0x1) { | |
| 539 DecodeAdvSIMDDataProcessing(instr); | |
| 540 } else { | |
| 541 if (instr->Bit(24) == 0) { | |
| 542 if (instr->Bit(21) == 0) { | |
| 543 if ((instr->Bit(23) == 1) || | |
| 544 (instr->Bit(18) == 1) || | |
| 545 (instr->Mask(0x80008000) == 0x00000000) || | |
| 546 (instr->Mask(0x000E0000) == 0x00000000) || | |
| 547 (instr->Mask(0x000E0000) == 0x000A0000) || | |
| 548 (instr->Mask(0x00160000) == 0x00000000) || | |
| 549 (instr->Mask(0x00160000) == 0x00120000)) { | |
| 550 V::VisitUnallocated(instr); | |
| 551 } else { | |
| 552 V::VisitFPFixedPointConvert(instr); | |
| 553 } | |
| 554 } else { | |
| 555 if (instr->Bits(15, 10) == 32) { | |
| 556 V::VisitUnallocated(instr); | |
| 557 } else if (instr->Bits(15, 10) == 0) { | |
| 558 if ((instr->Bits(23, 22) == 0x3) || | |
| 559 (instr->Mask(0x000E0000) == 0x000A0000) || | |
| 560 (instr->Mask(0x000E0000) == 0x000C0000) || | |
| 561 (instr->Mask(0x00160000) == 0x00120000) || | |
| 562 (instr->Mask(0x00160000) == 0x00140000) || | |
| 563 (instr->Mask(0x20C40000) == 0x00800000) || | |
| 564 (instr->Mask(0x20C60000) == 0x00840000) || | |
| 565 (instr->Mask(0xA0C60000) == 0x80060000) || | |
| 566 (instr->Mask(0xA0C60000) == 0x00860000) || | |
| 567 (instr->Mask(0xA0C60000) == 0x00460000) || | |
| 568 (instr->Mask(0xA0CE0000) == 0x80860000) || | |
| 569 (instr->Mask(0xA0CE0000) == 0x804E0000) || | |
| 570 (instr->Mask(0xA0CE0000) == 0x000E0000) || | |
| 571 (instr->Mask(0xA0D60000) == 0x00160000) || | |
| 572 (instr->Mask(0xA0D60000) == 0x80560000) || | |
| 573 (instr->Mask(0xA0D60000) == 0x80960000)) { | |
| 574 V::VisitUnallocated(instr); | |
| 575 } else { | |
| 576 V::VisitFPIntegerConvert(instr); | |
| 577 } | |
| 578 } else if (instr->Bits(14, 10) == 16) { | |
| 579 const Instr masked_A0DF8000 = instr->Mask(0xA0DF8000); | |
| 580 if ((instr->Mask(0x80180000) != 0) || | |
| 581 (masked_A0DF8000 == 0x00020000) || | |
| 582 (masked_A0DF8000 == 0x00030000) || | |
| 583 (masked_A0DF8000 == 0x00068000) || | |
| 584 (masked_A0DF8000 == 0x00428000) || | |
| 585 (masked_A0DF8000 == 0x00430000) || | |
| 586 (masked_A0DF8000 == 0x00468000) || | |
| 587 (instr->Mask(0xA0D80000) == 0x00800000) || | |
| 588 (instr->Mask(0xA0DE0000) == 0x00C00000) || | |
| 589 (instr->Mask(0xA0DF0000) == 0x00C30000) || | |
| 590 (instr->Mask(0xA0DC0000) == 0x00C40000)) { | |
| 591 V::VisitUnallocated(instr); | |
| 592 } else { | |
| 593 V::VisitFPDataProcessing1Source(instr); | |
| 594 } | |
| 595 } else if (instr->Bits(13, 10) == 8) { | |
| 596 if ((instr->Bits(15, 14) != 0) || | |
| 597 (instr->Bits(2, 0) != 0) || | |
| 598 (instr->Mask(0x80800000) != 0x00000000)) { | |
| 599 V::VisitUnallocated(instr); | |
| 600 } else { | |
| 601 V::VisitFPCompare(instr); | |
| 602 } | |
| 603 } else if (instr->Bits(12, 10) == 4) { | |
| 604 if ((instr->Bits(9, 5) != 0) || | |
| 605 (instr->Mask(0x80800000) != 0x00000000)) { | |
| 606 V::VisitUnallocated(instr); | |
| 607 } else { | |
| 608 V::VisitFPImmediate(instr); | |
| 609 } | |
| 610 } else { | |
| 611 if (instr->Mask(0x80800000) != 0x00000000) { | |
| 612 V::VisitUnallocated(instr); | |
| 613 } else { | |
| 614 switch (instr->Bits(11, 10)) { | |
| 615 case 1: { | |
| 616 V::VisitFPConditionalCompare(instr); | |
| 617 break; | |
| 618 } | |
| 619 case 2: { | |
| 620 if ((instr->Bits(15, 14) == 0x3) || | |
| 621 (instr->Mask(0x00009000) == 0x00009000) || | |
| 622 (instr->Mask(0x0000A000) == 0x0000A000)) { | |
| 623 V::VisitUnallocated(instr); | |
| 624 } else { | |
| 625 V::VisitFPDataProcessing2Source(instr); | |
| 626 } | |
| 627 break; | |
| 628 } | |
| 629 case 3: { | |
| 630 V::VisitFPConditionalSelect(instr); | |
| 631 break; | |
| 632 } | |
| 633 default: UNREACHABLE(); | |
| 634 } | |
| 635 } | |
| 636 } | |
| 637 } | |
| 638 } else { | |
| 639 // Bit 30 == 1 has been handled earlier. | |
| 640 ASSERT(instr->Bit(30) == 0); | |
| 641 if (instr->Mask(0xA0800000) != 0) { | |
| 642 V::VisitUnallocated(instr); | |
| 643 } else { | |
| 644 V::VisitFPDataProcessing3Source(instr); | |
| 645 } | |
| 646 } | |
| 647 } | |
| 648 } | |
| 649 } | |
| 650 } | |
| 651 | |
| 652 | |
| 653 template<typename V> | |
| 654 void Decoder<V>::DecodeAdvSIMDLoadStore(Instruction* instr) { | |
| 655 // TODO(all): Implement Advanced SIMD load/store instruction decode. | |
| 656 ASSERT(instr->Bits(29, 25) == 0x6); | |
| 657 V::VisitUnimplemented(instr); | |
| 658 } | |
| 659 | |
| 660 | |
| 661 template<typename V> | |
| 662 void Decoder<V>::DecodeAdvSIMDDataProcessing(Instruction* instr) { | |
| 663 // TODO(all): Implement Advanced SIMD data processing instruction decode. | |
| 664 ASSERT(instr->Bits(27, 25) == 0x7); | |
| 665 V::VisitUnimplemented(instr); | |
| 666 } | |
| 667 | |
| 668 | |
| 669 } } // namespace v8::internal | |
| 670 | |
| 671 #endif // V8_A64_DECODER_A64_INL_H_ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 207823003:
Rename A64 port to ARM64 port (Closed)
Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge