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 
22 namespace art {
23 namespace x86 {
24 
25 constexpr size_t kFramePointerSize = 4;
26 
27 class X86ManagedRuntimeCallingConvention FINAL : public ManagedRuntimeCallingConvention {
28  public:
X86ManagedRuntimeCallingConvention(bool is_static,bool is_synchronized,const char * shorty)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) {}
~X86ManagedRuntimeCallingConvention()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 
52 class X86JniCallingConvention FINAL : public JniCallingConvention {
53  public:
54   explicit X86JniCallingConvention(bool is_static, bool is_synchronized, const char* shorty);
~X86JniCallingConvention()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;
CalleeSaveRegisters()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;
FpSpillMask()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.
RequiresSmallResultTypeExtension()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