Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 1 | // Copyright 2011 Google Inc. All Rights Reserved. |
| 2 | |
| 3 | #ifndef ART_SRC_MANAGED_REGISTER_H_ |
| 4 | #define ART_SRC_MANAGED_REGISTER_H_ |
| 5 | |
Ian Rogers | 2c8f653 | 2011-09-02 17:16:34 -0700 | [diff] [blame^] | 6 | namespace art { |
| 7 | |
| 8 | namespace x86 { |
| 9 | class X86ManagedRegister; |
| 10 | } |
| 11 | namespace arm { |
| 12 | class ArmManagedRegister; |
| 13 | } |
| 14 | |
| 15 | class ManagedRegister { |
| 16 | public: |
| 17 | // ManagedRegister is a value class. There exists no method to change the |
| 18 | // internal state. We therefore allow a copy constructor and an |
| 19 | // assignment-operator. |
| 20 | ManagedRegister(const ManagedRegister& other) : id_(other.id_) { } |
| 21 | |
| 22 | ManagedRegister& operator=(const ManagedRegister& other) { |
| 23 | id_ = other.id_; |
| 24 | return *this; |
| 25 | } |
| 26 | |
| 27 | x86::X86ManagedRegister AsX86() const; |
| 28 | arm::ArmManagedRegister AsArm() const; |
| 29 | |
| 30 | // It is valid to invoke Equals on and with a NoRegister. |
| 31 | bool Equals(const ManagedRegister& other) const { |
| 32 | return id_ == other.id_; |
| 33 | } |
| 34 | |
| 35 | bool IsNoRegister() const { |
| 36 | return id_ == kNoRegister; |
| 37 | } |
| 38 | |
| 39 | static ManagedRegister NoRegister() { |
| 40 | return ManagedRegister(); |
| 41 | } |
| 42 | |
| 43 | protected: |
| 44 | static const int kNoRegister = -1; |
| 45 | |
| 46 | ManagedRegister() : id_(kNoRegister) { } |
| 47 | ManagedRegister(int reg_id) : id_(reg_id) { } |
| 48 | |
| 49 | int id_; |
| 50 | }; |
| 51 | |
| 52 | } // namespace art |
Ian Rogers | b033c75 | 2011-07-20 12:22:35 -0700 | [diff] [blame] | 53 | |
| 54 | #endif // ART_SRC_MANAGED_REGISTER_H_ |