1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_COMPILER_UTILS_MANAGED_REGISTER_H_ 18 #define ART_COMPILER_UTILS_MANAGED_REGISTER_H_ 19 20 namespace art { 21 22 namespace arm { 23 class ArmManagedRegister; 24 } 25 namespace mips { 26 class MipsManagedRegister; 27 } 28 namespace x86 { 29 class X86ManagedRegister; 30 } 31 32 class ManagedRegister { 33 public: 34 // ManagedRegister is a value class. There exists no method to change the 35 // internal state. We therefore allow a copy constructor and an 36 // assignment-operator. 37 ManagedRegister(const ManagedRegister& other) : id_(other.id_) { } 38 39 ManagedRegister& operator=(const ManagedRegister& other) { 40 id_ = other.id_; 41 return *this; 42 } 43 44 arm::ArmManagedRegister AsArm() const; 45 mips::MipsManagedRegister AsMips() const; 46 x86::X86ManagedRegister AsX86() const; 47 48 // It is valid to invoke Equals on and with a NoRegister. 49 bool Equals(const ManagedRegister& other) const { 50 return id_ == other.id_; 51 } 52 53 bool IsNoRegister() const { 54 return id_ == kNoRegister; 55 } 56 57 static ManagedRegister NoRegister() { 58 return ManagedRegister(); 59 } 60 61 protected: 62 static const int kNoRegister = -1; 63 64 ManagedRegister() : id_(kNoRegister) { } 65 explicit ManagedRegister(int reg_id) : id_(reg_id) { } 66 67 int id_; 68 }; 69 70 } // namespace art 71 72 #endif // ART_COMPILER_UTILS_MANAGED_REGISTER_H_ 73
