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| 1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 740 return Bits(kImm16Shift + kImm16Bits - 1, kImm16Shift); | 740 return Bits(kImm16Shift + kImm16Bits - 1, kImm16Shift); |
| 741 } | 741 } |
| 742 | 742 |
| 743 inline int32_t Imm26Value() const { | 743 inline int32_t Imm26Value() const { |
| 744 ASSERT(InstructionType() == kJumpType); | 744 ASSERT(InstructionType() == kJumpType); |
| 745 return Bits(kImm26Shift + kImm26Bits - 1, kImm26Shift); | 745 return Bits(kImm26Shift + kImm26Bits - 1, kImm26Shift); |
| 746 } | 746 } |
| 747 | 747 |
| 748 // Say if the instruction should not be used in a branch delay slot. | 748 // Say if the instruction should not be used in a branch delay slot. |
| 749 bool IsForbiddenInBranchDelay() const; | 749 bool IsForbiddenInBranchDelay() const; |
| 750 // Say if the instruction 'links'. eg: jal, bal. | 750 // Say if the instruction 'links'. e.g. jal, bal. |
| 751 bool IsLinkingInstruction() const; | 751 bool IsLinkingInstruction() const; |
| 752 // Say if the instruction is a break or a trap. | 752 // Say if the instruction is a break or a trap. |
| 753 bool IsTrap() const; | 753 bool IsTrap() const; |
| 754 | 754 |
| 755 // Instructions are read of out a code stream. The only way to get a | 755 // Instructions are read of out a code stream. The only way to get a |
| 756 // reference to an instruction is to convert a pointer. There is no way | 756 // reference to an instruction is to convert a pointer. There is no way |
| 757 // to allocate or create instances of class Instruction. | 757 // to allocate or create instances of class Instruction. |
| 758 // Use the At(pc) function to create references to Instruction. | 758 // Use the At(pc) function to create references to Instruction. |
| 759 static Instruction* At(byte* pc) { | 759 static Instruction* At(byte* pc) { |
| 760 return reinterpret_cast<Instruction*>(pc); | 760 return reinterpret_cast<Instruction*>(pc); |
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| 780 const int kBranchReturnOffset = 2 * Instruction::kInstrSize; | 780 const int kBranchReturnOffset = 2 * Instruction::kInstrSize; |
| 781 | 781 |
| 782 const int kDoubleAlignmentBits = 3; | 782 const int kDoubleAlignmentBits = 3; |
| 783 const int kDoubleAlignment = (1 << kDoubleAlignmentBits); | 783 const int kDoubleAlignment = (1 << kDoubleAlignmentBits); |
| 784 const int kDoubleAlignmentMask = kDoubleAlignment - 1; | 784 const int kDoubleAlignmentMask = kDoubleAlignment - 1; |
| 785 | 785 |
| 786 | 786 |
| 787 } } // namespace v8::internal | 787 } } // namespace v8::internal |
| 788 | 788 |
| 789 #endif // #ifndef V8_MIPS_CONSTANTS_H_ | 789 #endif // #ifndef V8_MIPS_CONSTANTS_H_ |
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