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_JNI_QUICK_ARM_CALLING_CONVENTION_ARM_H_ 18 #define ART_COMPILER_JNI_QUICK_ARM_CALLING_CONVENTION_ARM_H_ 19 20 #include "jni/quick/calling_convention.h" 21 22 namespace art { 23 namespace arm { 24 25 constexpr size_t kFramePointerSize = 4; 26 27 class ArmManagedRuntimeCallingConvention FINAL : public ManagedRuntimeCallingConvention { 28 public: 29 ArmManagedRuntimeCallingConvention(bool is_static, bool is_synchronized, const char* shorty) 30 : ManagedRuntimeCallingConvention(is_static, is_synchronized, shorty, kFramePointerSize) {} 31 ~ArmManagedRuntimeCallingConvention() OVERRIDE {} 32 // Calling convention 33 ManagedRegister ReturnRegister() OVERRIDE; 34 ManagedRegister InterproceduralScratchRegister() OVERRIDE; 35 // Managed runtime calling convention 36 ManagedRegister MethodRegister() OVERRIDE; 37 bool IsCurrentParamInRegister() OVERRIDE; 38 bool IsCurrentParamOnStack() OVERRIDE; 39 ManagedRegister CurrentParamRegister() OVERRIDE; 40 FrameOffset CurrentParamStackOffset() OVERRIDE; 41 const ManagedRegisterEntrySpills& EntrySpills() OVERRIDE; 42 43 private: 44 ManagedRegisterEntrySpills entry_spills_; 45 46 DISALLOW_COPY_AND_ASSIGN(ArmManagedRuntimeCallingConvention); 47 }; 48 49 class ArmJniCallingConvention FINAL : public JniCallingConvention { 50 public: 51 explicit ArmJniCallingConvention(bool is_static, bool is_synchronized, const char* shorty); 52 ~ArmJniCallingConvention() OVERRIDE {} 53 // Calling convention 54 ManagedRegister ReturnRegister() OVERRIDE; 55 ManagedRegister IntReturnRegister() OVERRIDE; 56 ManagedRegister InterproceduralScratchRegister() OVERRIDE; 57 // JNI calling convention 58 void Next() OVERRIDE; // Override default behavior for AAPCS 59 size_t FrameSize() OVERRIDE; 60 size_t OutArgSize() OVERRIDE; 61 const std::vector<ManagedRegister>& CalleeSaveRegisters() const OVERRIDE { 62 return callee_save_regs_; 63 } 64 ManagedRegister ReturnScratchRegister() const OVERRIDE; 65 uint32_t CoreSpillMask() const OVERRIDE; 66 uint32_t FpSpillMask() const OVERRIDE { 67 return 0; // Floats aren't spilled in JNI down call 68 } 69 bool IsCurrentParamInRegister() OVERRIDE; 70 bool IsCurrentParamOnStack() OVERRIDE; 71 ManagedRegister CurrentParamRegister() OVERRIDE; 72 FrameOffset CurrentParamStackOffset() OVERRIDE; 73 74 // AAPCS mandates return values are extended. 75 bool RequiresSmallResultTypeExtension() const OVERRIDE { 76 return false; 77 } 78 79 protected: 80 size_t NumberOfOutgoingStackArgs() OVERRIDE; 81 82 private: 83 // TODO: these values aren't unique and can be shared amongst instances 84 std::vector<ManagedRegister> callee_save_regs_; 85 86 // Padding to ensure longs and doubles are not split in AAPCS 87 size_t padding_; 88 89 DISALLOW_COPY_AND_ASSIGN(ArmJniCallingConvention); 90 }; 91 92 } // namespace arm 93 } // namespace art 94 95 #endif // ART_COMPILER_JNI_QUICK_ARM_CALLING_CONVENTION_ARM_H_ 96
