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
22namespace art {
23namespace arm {
24
25constexpr size_t kFramePointerSize = 4;
26
27class 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
49class 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