Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 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 "src/interpreter/bytecodes.h" |
| 6 | |
| 7 | #include "src/frames.h" |
| 8 | #include "src/interpreter/bytecode-traits.h" |
| 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | namespace interpreter { |
| 13 | |
| 14 | |
| 15 | // static |
| 16 | const char* Bytecodes::ToString(Bytecode bytecode) { |
| 17 | switch (bytecode) { |
| 18 | #define CASE(Name, ...) \ |
| 19 | case Bytecode::k##Name: \ |
| 20 | return #Name; |
| 21 | BYTECODE_LIST(CASE) |
| 22 | #undef CASE |
| 23 | } |
| 24 | UNREACHABLE(); |
| 25 | return ""; |
| 26 | } |
| 27 | |
| 28 | |
| 29 | // static |
| 30 | const char* Bytecodes::OperandTypeToString(OperandType operand_type) { |
| 31 | switch (operand_type) { |
| 32 | #define CASE(Name, _) \ |
| 33 | case OperandType::k##Name: \ |
| 34 | return #Name; |
| 35 | OPERAND_TYPE_LIST(CASE) |
| 36 | #undef CASE |
| 37 | } |
| 38 | UNREACHABLE(); |
| 39 | return ""; |
| 40 | } |
| 41 | |
| 42 | |
| 43 | // static |
| 44 | const char* Bytecodes::OperandSizeToString(OperandSize operand_size) { |
| 45 | switch (operand_size) { |
| 46 | case OperandSize::kNone: |
| 47 | return "None"; |
| 48 | case OperandSize::kByte: |
| 49 | return "Byte"; |
| 50 | case OperandSize::kShort: |
| 51 | return "Short"; |
| 52 | } |
| 53 | UNREACHABLE(); |
| 54 | return ""; |
| 55 | } |
| 56 | |
| 57 | |
| 58 | // static |
| 59 | uint8_t Bytecodes::ToByte(Bytecode bytecode) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 60 | DCHECK(bytecode <= Bytecode::kLast); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 61 | return static_cast<uint8_t>(bytecode); |
| 62 | } |
| 63 | |
| 64 | |
| 65 | // static |
| 66 | Bytecode Bytecodes::FromByte(uint8_t value) { |
| 67 | Bytecode bytecode = static_cast<Bytecode>(value); |
| 68 | DCHECK(bytecode <= Bytecode::kLast); |
| 69 | return bytecode; |
| 70 | } |
| 71 | |
| 72 | |
| 73 | // static |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 74 | Bytecode Bytecodes::GetDebugBreak(Bytecode bytecode) { |
| 75 | switch (Size(bytecode)) { |
| 76 | #define CASE(Name, ...) \ |
| 77 | case BytecodeTraits<__VA_ARGS__, OPERAND_TERM>::kSize: \ |
| 78 | return Bytecode::k##Name; |
| 79 | DEBUG_BREAK_BYTECODE_LIST(CASE) |
| 80 | #undef CASE |
| 81 | default: |
| 82 | break; |
| 83 | } |
| 84 | UNREACHABLE(); |
| 85 | return static_cast<Bytecode>(-1); |
| 86 | } |
| 87 | |
| 88 | // static |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 89 | int Bytecodes::Size(Bytecode bytecode) { |
| 90 | DCHECK(bytecode <= Bytecode::kLast); |
| 91 | switch (bytecode) { |
| 92 | #define CASE(Name, ...) \ |
| 93 | case Bytecode::k##Name: \ |
| 94 | return BytecodeTraits<__VA_ARGS__, OPERAND_TERM>::kSize; |
| 95 | BYTECODE_LIST(CASE) |
| 96 | #undef CASE |
| 97 | } |
| 98 | UNREACHABLE(); |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | |
| 103 | // static |
| 104 | int Bytecodes::NumberOfOperands(Bytecode bytecode) { |
| 105 | DCHECK(bytecode <= Bytecode::kLast); |
| 106 | switch (bytecode) { |
| 107 | #define CASE(Name, ...) \ |
| 108 | case Bytecode::k##Name: \ |
| 109 | return BytecodeTraits<__VA_ARGS__, OPERAND_TERM>::kOperandCount; |
| 110 | BYTECODE_LIST(CASE) |
| 111 | #undef CASE |
| 112 | } |
| 113 | UNREACHABLE(); |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | |
| 118 | // static |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 119 | int Bytecodes::NumberOfRegisterOperands(Bytecode bytecode) { |
| 120 | DCHECK(bytecode <= Bytecode::kLast); |
| 121 | switch (bytecode) { |
| 122 | #define CASE(Name, ...) \ |
| 123 | case Bytecode::k##Name: \ |
| 124 | typedef BytecodeTraits<__VA_ARGS__, OPERAND_TERM> Name##Trait; \ |
| 125 | return Name##Trait::kRegisterOperandCount; |
| 126 | BYTECODE_LIST(CASE) |
| 127 | #undef CASE |
| 128 | } |
| 129 | UNREACHABLE(); |
| 130 | return false; |
| 131 | } |
| 132 | |
| 133 | // static |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 134 | OperandType Bytecodes::GetOperandType(Bytecode bytecode, int i) { |
| 135 | DCHECK(bytecode <= Bytecode::kLast); |
| 136 | switch (bytecode) { |
| 137 | #define CASE(Name, ...) \ |
| 138 | case Bytecode::k##Name: \ |
| 139 | return BytecodeTraits<__VA_ARGS__, OPERAND_TERM>::GetOperandType(i); |
| 140 | BYTECODE_LIST(CASE) |
| 141 | #undef CASE |
| 142 | } |
| 143 | UNREACHABLE(); |
| 144 | return OperandType::kNone; |
| 145 | } |
| 146 | |
| 147 | |
| 148 | // static |
| 149 | OperandSize Bytecodes::GetOperandSize(Bytecode bytecode, int i) { |
| 150 | DCHECK(bytecode <= Bytecode::kLast); |
| 151 | switch (bytecode) { |
| 152 | #define CASE(Name, ...) \ |
| 153 | case Bytecode::k##Name: \ |
| 154 | return BytecodeTraits<__VA_ARGS__, OPERAND_TERM>::GetOperandSize(i); |
| 155 | BYTECODE_LIST(CASE) |
| 156 | #undef CASE |
| 157 | } |
| 158 | UNREACHABLE(); |
| 159 | return OperandSize::kNone; |
| 160 | } |
| 161 | |
| 162 | |
| 163 | // static |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 164 | int Bytecodes::GetRegisterOperandBitmap(Bytecode bytecode) { |
| 165 | DCHECK(bytecode <= Bytecode::kLast); |
| 166 | switch (bytecode) { |
| 167 | #define CASE(Name, ...) \ |
| 168 | case Bytecode::k##Name: \ |
| 169 | typedef BytecodeTraits<__VA_ARGS__, OPERAND_TERM> Name##Trait; \ |
| 170 | return Name##Trait::kRegisterOperandBitmap; |
| 171 | BYTECODE_LIST(CASE) |
| 172 | #undef CASE |
| 173 | } |
| 174 | UNREACHABLE(); |
| 175 | return false; |
| 176 | } |
| 177 | |
| 178 | // static |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 179 | int Bytecodes::GetOperandOffset(Bytecode bytecode, int i) { |
| 180 | DCHECK(bytecode <= Bytecode::kLast); |
| 181 | switch (bytecode) { |
| 182 | #define CASE(Name, ...) \ |
| 183 | case Bytecode::k##Name: \ |
| 184 | return BytecodeTraits<__VA_ARGS__, OPERAND_TERM>::GetOperandOffset(i); |
| 185 | BYTECODE_LIST(CASE) |
| 186 | #undef CASE |
| 187 | } |
| 188 | UNREACHABLE(); |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | |
| 193 | // static |
| 194 | OperandSize Bytecodes::SizeOfOperand(OperandType operand_type) { |
| 195 | switch (operand_type) { |
| 196 | #define CASE(Name, Size) \ |
| 197 | case OperandType::k##Name: \ |
| 198 | return Size; |
| 199 | OPERAND_TYPE_LIST(CASE) |
| 200 | #undef CASE |
| 201 | } |
| 202 | UNREACHABLE(); |
| 203 | return OperandSize::kNone; |
| 204 | } |
| 205 | |
| 206 | |
| 207 | // static |
| 208 | bool Bytecodes::IsConditionalJumpImmediate(Bytecode bytecode) { |
| 209 | return bytecode == Bytecode::kJumpIfTrue || |
| 210 | bytecode == Bytecode::kJumpIfFalse || |
| 211 | bytecode == Bytecode::kJumpIfToBooleanTrue || |
| 212 | bytecode == Bytecode::kJumpIfToBooleanFalse || |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 213 | bytecode == Bytecode::kJumpIfNotHole || |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 214 | bytecode == Bytecode::kJumpIfNull || |
| 215 | bytecode == Bytecode::kJumpIfUndefined; |
| 216 | } |
| 217 | |
| 218 | |
| 219 | // static |
| 220 | bool Bytecodes::IsConditionalJumpConstant(Bytecode bytecode) { |
| 221 | return bytecode == Bytecode::kJumpIfTrueConstant || |
| 222 | bytecode == Bytecode::kJumpIfFalseConstant || |
| 223 | bytecode == Bytecode::kJumpIfToBooleanTrueConstant || |
| 224 | bytecode == Bytecode::kJumpIfToBooleanFalseConstant || |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 225 | bytecode == Bytecode::kJumpIfNotHoleConstant || |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 226 | bytecode == Bytecode::kJumpIfNullConstant || |
| 227 | bytecode == Bytecode::kJumpIfUndefinedConstant; |
| 228 | } |
| 229 | |
| 230 | |
| 231 | // static |
| 232 | bool Bytecodes::IsConditionalJumpConstantWide(Bytecode bytecode) { |
| 233 | return bytecode == Bytecode::kJumpIfTrueConstantWide || |
| 234 | bytecode == Bytecode::kJumpIfFalseConstantWide || |
| 235 | bytecode == Bytecode::kJumpIfToBooleanTrueConstantWide || |
| 236 | bytecode == Bytecode::kJumpIfToBooleanFalseConstantWide || |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 237 | bytecode == Bytecode::kJumpIfNotHoleConstantWide || |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 238 | bytecode == Bytecode::kJumpIfNullConstantWide || |
| 239 | bytecode == Bytecode::kJumpIfUndefinedConstantWide; |
| 240 | } |
| 241 | |
| 242 | |
| 243 | // static |
| 244 | bool Bytecodes::IsConditionalJump(Bytecode bytecode) { |
| 245 | return IsConditionalJumpImmediate(bytecode) || |
| 246 | IsConditionalJumpConstant(bytecode) || |
| 247 | IsConditionalJumpConstantWide(bytecode); |
| 248 | } |
| 249 | |
| 250 | |
| 251 | // static |
| 252 | bool Bytecodes::IsJumpImmediate(Bytecode bytecode) { |
| 253 | return bytecode == Bytecode::kJump || IsConditionalJumpImmediate(bytecode); |
| 254 | } |
| 255 | |
| 256 | |
| 257 | // static |
| 258 | bool Bytecodes::IsJumpConstant(Bytecode bytecode) { |
| 259 | return bytecode == Bytecode::kJumpConstant || |
| 260 | IsConditionalJumpConstant(bytecode); |
| 261 | } |
| 262 | |
| 263 | |
| 264 | // static |
| 265 | bool Bytecodes::IsJumpConstantWide(Bytecode bytecode) { |
| 266 | return bytecode == Bytecode::kJumpConstantWide || |
| 267 | IsConditionalJumpConstantWide(bytecode); |
| 268 | } |
| 269 | |
| 270 | |
| 271 | // static |
| 272 | bool Bytecodes::IsJump(Bytecode bytecode) { |
| 273 | return IsJumpImmediate(bytecode) || IsJumpConstant(bytecode) || |
| 274 | IsJumpConstantWide(bytecode); |
| 275 | } |
| 276 | |
| 277 | |
| 278 | // static |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 279 | bool Bytecodes::IsCallOrNew(Bytecode bytecode) { |
| 280 | return bytecode == Bytecode::kCall || bytecode == Bytecode::kTailCall || |
| 281 | bytecode == Bytecode::kNew || bytecode == Bytecode::kCallWide || |
| 282 | bytecode == Bytecode::kTailCallWide || bytecode == Bytecode::kNewWide; |
| 283 | } |
| 284 | |
| 285 | // static |
| 286 | bool Bytecodes::IsDebugBreak(Bytecode bytecode) { |
| 287 | switch (bytecode) { |
| 288 | #define CASE(Name, ...) case Bytecode::k##Name: |
| 289 | DEBUG_BREAK_BYTECODE_LIST(CASE); |
| 290 | #undef CASE |
| 291 | return true; |
| 292 | default: |
| 293 | break; |
| 294 | } |
| 295 | return false; |
| 296 | } |
| 297 | |
| 298 | // static |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 299 | bool Bytecodes::IsJumpOrReturn(Bytecode bytecode) { |
| 300 | return bytecode == Bytecode::kReturn || IsJump(bytecode); |
| 301 | } |
| 302 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 303 | // static |
| 304 | bool Bytecodes::IsIndexOperandType(OperandType operand_type) { |
| 305 | return operand_type == OperandType::kIdx8 || |
| 306 | operand_type == OperandType::kIdx16; |
| 307 | } |
| 308 | |
| 309 | // static |
| 310 | bool Bytecodes::IsImmediateOperandType(OperandType operand_type) { |
| 311 | return operand_type == OperandType::kImm8; |
| 312 | } |
| 313 | |
| 314 | // static |
| 315 | bool Bytecodes::IsRegisterCountOperandType(OperandType operand_type) { |
| 316 | return (operand_type == OperandType::kRegCount8 || |
| 317 | operand_type == OperandType::kRegCount16); |
| 318 | } |
| 319 | |
| 320 | // static |
| 321 | bool Bytecodes::IsMaybeRegisterOperandType(OperandType operand_type) { |
| 322 | return (operand_type == OperandType::kMaybeReg8 || |
| 323 | operand_type == OperandType::kMaybeReg16); |
| 324 | } |
| 325 | |
| 326 | // static |
| 327 | bool Bytecodes::IsRegisterOperandType(OperandType operand_type) { |
| 328 | switch (operand_type) { |
| 329 | #define CASE(Name, _) \ |
| 330 | case OperandType::k##Name: \ |
| 331 | return true; |
| 332 | REGISTER_OPERAND_TYPE_LIST(CASE) |
| 333 | #undef CASE |
| 334 | #define CASE(Name, _) \ |
| 335 | case OperandType::k##Name: \ |
| 336 | break; |
| 337 | NON_REGISTER_OPERAND_TYPE_LIST(CASE) |
| 338 | #undef CASE |
| 339 | } |
| 340 | return false; |
| 341 | } |
| 342 | |
| 343 | // static |
| 344 | bool Bytecodes::IsRegisterInputOperandType(OperandType operand_type) { |
| 345 | switch (operand_type) { |
| 346 | #define CASE(Name, _) \ |
| 347 | case OperandType::k##Name: \ |
| 348 | return true; |
| 349 | REGISTER_INPUT_OPERAND_TYPE_LIST(CASE) |
| 350 | #undef CASE |
| 351 | #define CASE(Name, _) \ |
| 352 | case OperandType::k##Name: \ |
| 353 | break; |
| 354 | NON_REGISTER_OPERAND_TYPE_LIST(CASE) |
| 355 | REGISTER_OUTPUT_OPERAND_TYPE_LIST(CASE) |
| 356 | #undef CASE |
| 357 | } |
| 358 | return false; |
| 359 | } |
| 360 | |
| 361 | // static |
| 362 | bool Bytecodes::IsRegisterOutputOperandType(OperandType operand_type) { |
| 363 | switch (operand_type) { |
| 364 | #define CASE(Name, _) \ |
| 365 | case OperandType::k##Name: \ |
| 366 | return true; |
| 367 | REGISTER_OUTPUT_OPERAND_TYPE_LIST(CASE) |
| 368 | #undef CASE |
| 369 | #define CASE(Name, _) \ |
| 370 | case OperandType::k##Name: \ |
| 371 | break; |
| 372 | NON_REGISTER_OPERAND_TYPE_LIST(CASE) |
| 373 | REGISTER_INPUT_OPERAND_TYPE_LIST(CASE) |
| 374 | #undef CASE |
| 375 | } |
| 376 | return false; |
| 377 | } |
| 378 | |
| 379 | namespace { |
| 380 | static Register DecodeRegister(const uint8_t* operand_start, |
| 381 | OperandType operand_type) { |
| 382 | switch (Bytecodes::SizeOfOperand(operand_type)) { |
| 383 | case OperandSize::kByte: |
| 384 | return Register::FromOperand(*operand_start); |
| 385 | case OperandSize::kShort: |
| 386 | return Register::FromWideOperand(ReadUnalignedUInt16(operand_start)); |
| 387 | case OperandSize::kNone: { |
| 388 | UNREACHABLE(); |
| 389 | } |
| 390 | } |
| 391 | return Register(); |
| 392 | } |
| 393 | } // namespace |
| 394 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 395 | |
| 396 | // static |
| 397 | std::ostream& Bytecodes::Decode(std::ostream& os, const uint8_t* bytecode_start, |
| 398 | int parameter_count) { |
| 399 | Vector<char> buf = Vector<char>::New(50); |
| 400 | |
| 401 | Bytecode bytecode = Bytecodes::FromByte(bytecode_start[0]); |
| 402 | int bytecode_size = Bytecodes::Size(bytecode); |
| 403 | |
| 404 | for (int i = 0; i < bytecode_size; i++) { |
| 405 | SNPrintF(buf, "%02x ", bytecode_start[i]); |
| 406 | os << buf.start(); |
| 407 | } |
| 408 | const int kBytecodeColumnSize = 6; |
| 409 | for (int i = bytecode_size; i < kBytecodeColumnSize; i++) { |
| 410 | os << " "; |
| 411 | } |
| 412 | |
| 413 | os << bytecode << " "; |
| 414 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 415 | // Operands for the debug break are from the original instruction. |
| 416 | if (IsDebugBreak(bytecode)) return os; |
| 417 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 418 | int number_of_operands = NumberOfOperands(bytecode); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 419 | int range = 0; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 420 | for (int i = 0; i < number_of_operands; i++) { |
| 421 | OperandType op_type = GetOperandType(bytecode, i); |
| 422 | const uint8_t* operand_start = |
| 423 | &bytecode_start[GetOperandOffset(bytecode, i)]; |
| 424 | switch (op_type) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 425 | case interpreter::OperandType::kRegCount8: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 426 | os << "#" << static_cast<unsigned int>(*operand_start); |
| 427 | break; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 428 | case interpreter::OperandType::kRegCount16: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 429 | os << '#' << ReadUnalignedUInt16(operand_start); |
| 430 | break; |
| 431 | case interpreter::OperandType::kIdx8: |
| 432 | os << "[" << static_cast<unsigned int>(*operand_start) << "]"; |
| 433 | break; |
| 434 | case interpreter::OperandType::kIdx16: |
| 435 | os << "[" << ReadUnalignedUInt16(operand_start) << "]"; |
| 436 | break; |
| 437 | case interpreter::OperandType::kImm8: |
| 438 | os << "#" << static_cast<int>(static_cast<int8_t>(*operand_start)); |
| 439 | break; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 440 | case interpreter::OperandType::kMaybeReg8: |
| 441 | case interpreter::OperandType::kMaybeReg16: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 442 | case interpreter::OperandType::kReg8: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 443 | case interpreter::OperandType::kReg16: |
| 444 | case interpreter::OperandType::kRegOut8: |
| 445 | case interpreter::OperandType::kRegOut16: { |
| 446 | Register reg = DecodeRegister(operand_start, op_type); |
| 447 | os << reg.ToString(parameter_count); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 448 | break; |
| 449 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 450 | case interpreter::OperandType::kRegOutTriple8: |
| 451 | case interpreter::OperandType::kRegOutTriple16: |
| 452 | range += 1; |
| 453 | case interpreter::OperandType::kRegOutPair8: |
| 454 | case interpreter::OperandType::kRegOutPair16: |
| 455 | case interpreter::OperandType::kRegPair8: |
| 456 | case interpreter::OperandType::kRegPair16: { |
| 457 | range += 1; |
| 458 | Register first_reg = DecodeRegister(operand_start, op_type); |
| 459 | Register last_reg = Register(first_reg.index() + range); |
| 460 | os << first_reg.ToString(parameter_count) << "-" |
| 461 | << last_reg.ToString(parameter_count); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 462 | break; |
| 463 | } |
| 464 | case interpreter::OperandType::kNone: |
| 465 | UNREACHABLE(); |
| 466 | break; |
| 467 | } |
| 468 | if (i != number_of_operands - 1) { |
| 469 | os << ", "; |
| 470 | } |
| 471 | } |
| 472 | return os; |
| 473 | } |
| 474 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 475 | std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode) { |
| 476 | return os << Bytecodes::ToString(bytecode); |
| 477 | } |
| 478 | |
| 479 | |
| 480 | std::ostream& operator<<(std::ostream& os, const OperandType& operand_type) { |
| 481 | return os << Bytecodes::OperandTypeToString(operand_type); |
| 482 | } |
| 483 | |
| 484 | |
| 485 | std::ostream& operator<<(std::ostream& os, const OperandSize& operand_size) { |
| 486 | return os << Bytecodes::OperandSizeToString(operand_size); |
| 487 | } |
| 488 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 489 | static const int kLastParamRegisterIndex = |
| 490 | -InterpreterFrameConstants::kLastParamFromRegisterPointer / kPointerSize; |
| 491 | static const int kFunctionClosureRegisterIndex = |
| 492 | -InterpreterFrameConstants::kFunctionFromRegisterPointer / kPointerSize; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 493 | static const int kCurrentContextRegisterIndex = |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 494 | -InterpreterFrameConstants::kContextFromRegisterPointer / kPointerSize; |
| 495 | static const int kNewTargetRegisterIndex = |
| 496 | -InterpreterFrameConstants::kNewTargetFromRegisterPointer / kPointerSize; |
| 497 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 498 | // The register space is a signed 16-bit space. Register operands |
| 499 | // occupy range above 0. Parameter indices are biased with the |
| 500 | // negative value kLastParamRegisterIndex for ease of access in the |
| 501 | // interpreter. |
| 502 | static const int kMaxParameterIndex = kMaxInt16 + kLastParamRegisterIndex; |
| 503 | static const int kMaxRegisterIndex = -kMinInt16; |
| 504 | static const int kMaxReg8Index = -kMinInt8; |
| 505 | static const int kMinReg8Index = -kMaxInt8; |
| 506 | static const int kMaxReg16Index = -kMinInt16; |
| 507 | static const int kMinReg16Index = -kMaxInt16; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 508 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 509 | bool Register::is_byte_operand() const { |
| 510 | return index_ >= kMinReg8Index && index_ <= kMaxReg8Index; |
| 511 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 512 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 513 | bool Register::is_short_operand() const { |
| 514 | return index_ >= kMinReg16Index && index_ <= kMaxReg16Index; |
| 515 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 516 | |
| 517 | Register Register::FromParameterIndex(int index, int parameter_count) { |
| 518 | DCHECK_GE(index, 0); |
| 519 | DCHECK_LT(index, parameter_count); |
| 520 | DCHECK_LE(parameter_count, kMaxParameterIndex + 1); |
| 521 | int register_index = kLastParamRegisterIndex - parameter_count + index + 1; |
| 522 | DCHECK_LT(register_index, 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 523 | return Register(register_index); |
| 524 | } |
| 525 | |
| 526 | |
| 527 | int Register::ToParameterIndex(int parameter_count) const { |
| 528 | DCHECK(is_parameter()); |
| 529 | return index() - kLastParamRegisterIndex + parameter_count - 1; |
| 530 | } |
| 531 | |
| 532 | |
| 533 | Register Register::function_closure() { |
| 534 | return Register(kFunctionClosureRegisterIndex); |
| 535 | } |
| 536 | |
| 537 | |
| 538 | bool Register::is_function_closure() const { |
| 539 | return index() == kFunctionClosureRegisterIndex; |
| 540 | } |
| 541 | |
| 542 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 543 | Register Register::current_context() { |
| 544 | return Register(kCurrentContextRegisterIndex); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 548 | bool Register::is_current_context() const { |
| 549 | return index() == kCurrentContextRegisterIndex; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 550 | } |
| 551 | |
| 552 | |
| 553 | Register Register::new_target() { return Register(kNewTargetRegisterIndex); } |
| 554 | |
| 555 | |
| 556 | bool Register::is_new_target() const { |
| 557 | return index() == kNewTargetRegisterIndex; |
| 558 | } |
| 559 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 560 | int Register::MaxParameterIndex() { return kMaxParameterIndex; } |
| 561 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 562 | int Register::MaxRegisterIndex() { return kMaxRegisterIndex; } |
| 563 | |
| 564 | int Register::MaxRegisterIndexForByteOperand() { return kMaxReg8Index; } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 565 | |
| 566 | uint8_t Register::ToOperand() const { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 567 | DCHECK(is_byte_operand()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 568 | return static_cast<uint8_t>(-index_); |
| 569 | } |
| 570 | |
| 571 | |
| 572 | Register Register::FromOperand(uint8_t operand) { |
| 573 | return Register(-static_cast<int8_t>(operand)); |
| 574 | } |
| 575 | |
| 576 | |
| 577 | uint16_t Register::ToWideOperand() const { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 578 | DCHECK(is_short_operand()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 579 | return static_cast<uint16_t>(-index_); |
| 580 | } |
| 581 | |
| 582 | |
| 583 | Register Register::FromWideOperand(uint16_t operand) { |
| 584 | return Register(-static_cast<int16_t>(operand)); |
| 585 | } |
| 586 | |
| 587 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 588 | uint32_t Register::ToRawOperand() const { |
| 589 | return static_cast<uint32_t>(-index_); |
| 590 | } |
| 591 | |
| 592 | |
| 593 | Register Register::FromRawOperand(uint32_t operand) { |
| 594 | return Register(-static_cast<int32_t>(operand)); |
| 595 | } |
| 596 | |
| 597 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 598 | bool Register::AreContiguous(Register reg1, Register reg2, Register reg3, |
| 599 | Register reg4, Register reg5) { |
| 600 | if (reg1.index() + 1 != reg2.index()) { |
| 601 | return false; |
| 602 | } |
| 603 | if (reg3.is_valid() && reg2.index() + 1 != reg3.index()) { |
| 604 | return false; |
| 605 | } |
| 606 | if (reg4.is_valid() && reg3.index() + 1 != reg4.index()) { |
| 607 | return false; |
| 608 | } |
| 609 | if (reg5.is_valid() && reg4.index() + 1 != reg5.index()) { |
| 610 | return false; |
| 611 | } |
| 612 | return true; |
| 613 | } |
| 614 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 615 | std::string Register::ToString(int parameter_count) { |
| 616 | if (is_current_context()) { |
| 617 | return std::string("<context>"); |
| 618 | } else if (is_function_closure()) { |
| 619 | return std::string("<closure>"); |
| 620 | } else if (is_new_target()) { |
| 621 | return std::string("<new.target>"); |
| 622 | } else if (is_parameter()) { |
| 623 | int parameter_index = ToParameterIndex(parameter_count); |
| 624 | if (parameter_index == 0) { |
| 625 | return std::string("<this>"); |
| 626 | } else { |
| 627 | std::ostringstream s; |
| 628 | s << "a" << parameter_index - 1; |
| 629 | return s.str(); |
| 630 | } |
| 631 | } else { |
| 632 | std::ostringstream s; |
| 633 | s << "r" << index(); |
| 634 | return s.str(); |
| 635 | } |
| 636 | } |
| 637 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 638 | } // namespace interpreter |
| 639 | } // namespace internal |
| 640 | } // namespace v8 |