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1 // Copyright 2015 the V8 project authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_INTERPRETER_BYTECODES_H_ | 5 #ifndef V8_INTERPRETER_BYTECODES_H_ |
6 #define V8_INTERPRETER_BYTECODES_H_ | 6 #define V8_INTERPRETER_BYTECODES_H_ |
7 | 7 |
8 #include <iosfwd> | 8 #include <iosfwd> |
9 | 9 |
10 // Clients of this interface shouldn't depend on lots of interpreter internals. | 10 // Clients of this interface shouldn't depend on lots of interpreter internals. |
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380 bool is_new_target() const; | 380 bool is_new_target() const; |
381 | 381 |
382 // Returns the register for the bytecode array. | 382 // Returns the register for the bytecode array. |
383 static Register bytecode_array(); | 383 static Register bytecode_array(); |
384 bool is_bytecode_array() const; | 384 bool is_bytecode_array() const; |
385 | 385 |
386 // Returns the register for the saved bytecode offset. | 386 // Returns the register for the saved bytecode offset. |
387 static Register bytecode_offset(); | 387 static Register bytecode_offset(); |
388 bool is_bytecode_offset() const; | 388 bool is_bytecode_offset() const; |
389 | 389 |
| 390 // Returns a register that can be used to represent the accumulator |
| 391 // within code in the interpreter, but should never be emitted in |
| 392 // bytecode. |
| 393 static Register virtual_accumulator(); |
| 394 |
390 OperandSize SizeOfOperand() const; | 395 OperandSize SizeOfOperand() const; |
391 | 396 |
392 int32_t ToOperand() const { return kRegisterFileStartOffset - index_; } | 397 int32_t ToOperand() const { return kRegisterFileStartOffset - index_; } |
393 static Register FromOperand(int32_t operand) { | 398 static Register FromOperand(int32_t operand) { |
394 return Register(kRegisterFileStartOffset - operand); | 399 return Register(kRegisterFileStartOffset - operand); |
395 } | 400 } |
396 | 401 |
397 static bool AreContiguous(Register reg1, Register reg2, | 402 static bool AreContiguous(Register reg1, Register reg2, |
398 Register reg3 = Register(), | 403 Register reg3 = Register(), |
399 Register reg4 = Register(), | 404 Register reg4 = Register(), |
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498 static OperandType GetOperandType(Bytecode bytecode, int i); | 503 static OperandType GetOperandType(Bytecode bytecode, int i); |
499 | 504 |
500 // Returns a pointer to an array of operand types terminated in | 505 // Returns a pointer to an array of operand types terminated in |
501 // OperandType::kNone. | 506 // OperandType::kNone. |
502 static const OperandType* GetOperandTypes(Bytecode bytecode); | 507 static const OperandType* GetOperandTypes(Bytecode bytecode); |
503 | 508 |
504 // Returns the size of the i-th operand of |bytecode|. | 509 // Returns the size of the i-th operand of |bytecode|. |
505 static OperandSize GetOperandSize(Bytecode bytecode, int i, | 510 static OperandSize GetOperandSize(Bytecode bytecode, int i, |
506 OperandScale operand_scale); | 511 OperandScale operand_scale); |
507 | 512 |
| 513 // Returns a pointer to an array of the operand sizes for |bytecode|. |
| 514 static const OperandSize* GetOperandSizes(Bytecode bytecode, |
| 515 OperandScale operand_scale); |
| 516 |
508 // Returns the offset of the i-th operand of |bytecode| relative to the start | 517 // Returns the offset of the i-th operand of |bytecode| relative to the start |
509 // of the bytecode. | 518 // of the bytecode. |
510 static int GetOperandOffset(Bytecode bytecode, int i, | 519 static int GetOperandOffset(Bytecode bytecode, int i, |
511 OperandScale operand_scale); | 520 OperandScale operand_scale); |
512 | 521 |
513 // Returns a zero-based bitmap of the register operand positions of | 522 // Returns a zero-based bitmap of the register operand positions of |
514 // |bytecode|. | 523 // |bytecode|. |
515 static int GetRegisterOperandBitmap(Bytecode bytecode); | 524 static int GetRegisterOperandBitmap(Bytecode bytecode); |
516 | 525 |
517 // Returns a debug break bytecode to replace |bytecode|. | 526 // Returns a debug break bytecode to replace |bytecode|. |
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635 static OperandSize SizeForSignedOperand(int value); | 644 static OperandSize SizeForSignedOperand(int value); |
636 | 645 |
637 // Return the operand size required to hold an unsigned operand. | 646 // Return the operand size required to hold an unsigned operand. |
638 static OperandSize SizeForUnsignedOperand(int value); | 647 static OperandSize SizeForUnsignedOperand(int value); |
639 | 648 |
640 // Return the operand size required to hold an unsigned operand. | 649 // Return the operand size required to hold an unsigned operand. |
641 static OperandSize SizeForUnsignedOperand(size_t value); | 650 static OperandSize SizeForUnsignedOperand(size_t value); |
642 | 651 |
643 // Return the OperandScale required for bytecode emission of | 652 // Return the OperandScale required for bytecode emission of |
644 // operand sizes. | 653 // operand sizes. |
| 654 static OperandScale OperandSizesToScale(OperandSize size0); |
| 655 static OperandScale OperandSizesToScale(OperandSize size0, OperandSize size1); |
645 static OperandScale OperandSizesToScale( | 656 static OperandScale OperandSizesToScale( |
646 OperandSize size0, OperandSize size1 = OperandSize::kByte, | 657 OperandSize size0, OperandSize size1, OperandSize size2, |
647 OperandSize size2 = OperandSize::kByte, | |
648 OperandSize size3 = OperandSize::kByte); | 658 OperandSize size3 = OperandSize::kByte); |
649 | 659 |
650 private: | 660 private: |
651 DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes); | 661 DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes); |
652 }; | 662 }; |
653 | 663 |
654 class CreateObjectLiteralFlags { | 664 class CreateObjectLiteralFlags { |
655 public: | 665 public: |
656 class FlagsBits : public BitField8<int, 0, 3> {}; | 666 class FlagsBits : public BitField8<int, 0, 3> {}; |
657 class FastClonePropertiesCountBits | 667 class FastClonePropertiesCountBits |
658 : public BitField8<int, FlagsBits::kNext, 3> {}; | 668 : public BitField8<int, FlagsBits::kNext, 3> {}; |
659 STATIC_ASSERT((FlagsBits::kMask & FastClonePropertiesCountBits::kMask) == 0); | 669 STATIC_ASSERT((FlagsBits::kMask & FastClonePropertiesCountBits::kMask) == 0); |
660 }; | 670 }; |
661 | 671 |
662 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode); | 672 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode); |
663 std::ostream& operator<<(std::ostream& os, const AccumulatorUse& use); | 673 std::ostream& operator<<(std::ostream& os, const AccumulatorUse& use); |
664 std::ostream& operator<<(std::ostream& os, const OperandScale& operand_scale); | 674 std::ostream& operator<<(std::ostream& os, const OperandScale& operand_scale); |
665 std::ostream& operator<<(std::ostream& os, const OperandSize& operand_size); | 675 std::ostream& operator<<(std::ostream& os, const OperandSize& operand_size); |
666 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type); | 676 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type); |
667 | 677 |
668 } // namespace interpreter | 678 } // namespace interpreter |
669 } // namespace internal | 679 } // namespace internal |
670 } // namespace v8 | 680 } // namespace v8 |
671 | 681 |
672 #endif // V8_INTERPRETER_BYTECODES_H_ | 682 #endif // V8_INTERPRETER_BYTECODES_H_ |
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