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_X86_CALLING_CONVENTION_X86_H_
18#define ART_COMPILER_JNI_QUICK_X86_CALLING_CONVENTION_X86_H_
19
20#include "jni/quick/calling_convention.h"
21
22namespace art {
23namespace x86 {
24
25constexpr size_t kFramePointerSize = 4;
26
27class X86ManagedRuntimeCallingConvention FINAL : public ManagedRuntimeCallingConvention {
28 public:
29  explicit X86ManagedRuntimeCallingConvention(bool is_static, bool is_synchronized,
30                                              const char* shorty)
31      : ManagedRuntimeCallingConvention(is_static, is_synchronized, shorty, kFramePointerSize),
32        gpr_arg_count_(0) {}
33  ~X86ManagedRuntimeCallingConvention() OVERRIDE {}
34  // Calling convention
35  ManagedRegister ReturnRegister() OVERRIDE;
36  ManagedRegister InterproceduralScratchRegister() OVERRIDE;
37  // Managed runtime calling convention
38  ManagedRegister MethodRegister() OVERRIDE;
39  bool IsCurrentParamInRegister() OVERRIDE;
40  bool IsCurrentParamOnStack() OVERRIDE;
41  ManagedRegister CurrentParamRegister() OVERRIDE;
42  FrameOffset CurrentParamStackOffset() OVERRIDE;
43  const ManagedRegisterEntrySpills& EntrySpills() OVERRIDE;
44
45 private:
46  int gpr_arg_count_;
47  ManagedRegister CurrentParamHighLongRegister();
48  ManagedRegisterEntrySpills entry_spills_;
49  DISALLOW_COPY_AND_ASSIGN(X86ManagedRuntimeCallingConvention);
50};
51
52class X86JniCallingConvention FINAL : public JniCallingConvention {
53 public:
54  explicit X86JniCallingConvention(bool is_static, bool is_synchronized, const char* shorty);
55  ~X86JniCallingConvention() OVERRIDE {}
56  // Calling convention
57  ManagedRegister ReturnRegister() OVERRIDE;
58  ManagedRegister IntReturnRegister() OVERRIDE;
59  ManagedRegister InterproceduralScratchRegister() OVERRIDE;
60  // JNI calling convention
61  size_t FrameSize() OVERRIDE;
62  size_t OutArgSize() OVERRIDE;
63  const std::vector<ManagedRegister>& CalleeSaveRegisters() const OVERRIDE {
64    return callee_save_regs_;
65  }
66  ManagedRegister ReturnScratchRegister() const OVERRIDE;
67  uint32_t CoreSpillMask() const OVERRIDE;
68  uint32_t FpSpillMask() const OVERRIDE {
69    return 0;
70  }
71  bool IsCurrentParamInRegister() OVERRIDE;
72  bool IsCurrentParamOnStack() OVERRIDE;
73  ManagedRegister CurrentParamRegister() OVERRIDE;
74  FrameOffset CurrentParamStackOffset() OVERRIDE;
75
76  // x86 needs to extend small return types.
77  bool RequiresSmallResultTypeExtension() const OVERRIDE {
78    return true;
79  }
80
81 protected:
82  size_t NumberOfOutgoingStackArgs() OVERRIDE;
83
84 private:
85  // TODO: these values aren't unique and can be shared amongst instances
86  std::vector<ManagedRegister> callee_save_regs_;
87
88  DISALLOW_COPY_AND_ASSIGN(X86JniCallingConvention);
89};
90
91}  // namespace x86
92}  // namespace art
93
94#endif  // ART_COMPILER_JNI_QUICK_X86_CALLING_CONVENTION_X86_H_
95