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