1 /*
2  * Copyright (C) 2015 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_MIPS64_CALLING_CONVENTION_MIPS64_H_
18 #define ART_COMPILER_JNI_QUICK_MIPS64_CALLING_CONVENTION_MIPS64_H_
19 
20 #include "jni/quick/calling_convention.h"
21 
22 namespace art {
23 namespace mips64 {
24 
25 constexpr size_t kFramePointerSize = 8;
26 
27 class Mips64ManagedRuntimeCallingConvention FINAL : public ManagedRuntimeCallingConvention {
28  public:
Mips64ManagedRuntimeCallingConvention(bool is_static,bool is_synchronized,const char * shorty)29   Mips64ManagedRuntimeCallingConvention(bool is_static, bool is_synchronized, const char* shorty)
30       : ManagedRuntimeCallingConvention(is_static, is_synchronized, shorty, kFramePointerSize) {}
~Mips64ManagedRuntimeCallingConvention()31   ~Mips64ManagedRuntimeCallingConvention() 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(Mips64ManagedRuntimeCallingConvention);
47 };
48 
49 class Mips64JniCallingConvention FINAL : public JniCallingConvention {
50  public:
51   explicit Mips64JniCallingConvention(bool is_static, bool is_synchronized, const char* shorty);
~Mips64JniCallingConvention()52   ~Mips64JniCallingConvention() OVERRIDE {}
53   // Calling convention
54   ManagedRegister ReturnRegister() OVERRIDE;
55   ManagedRegister IntReturnRegister() OVERRIDE;
56   ManagedRegister InterproceduralScratchRegister() OVERRIDE;
57   // JNI calling convention
58   size_t FrameSize() OVERRIDE;
59   size_t OutArgSize() OVERRIDE;
CalleeSaveRegisters()60   const std::vector<ManagedRegister>& CalleeSaveRegisters() const OVERRIDE {
61     return callee_save_regs_;
62   }
63   ManagedRegister ReturnScratchRegister() const OVERRIDE;
64   uint32_t CoreSpillMask() const OVERRIDE;
FpSpillMask()65   uint32_t FpSpillMask() const OVERRIDE {
66     return 0;  // Floats aren't spilled in JNI down call
67   }
68   bool IsCurrentParamInRegister() OVERRIDE;
69   bool IsCurrentParamOnStack() OVERRIDE;
70   ManagedRegister CurrentParamRegister() OVERRIDE;
71   FrameOffset CurrentParamStackOffset() OVERRIDE;
72 
73   // Mips64 does not need to extend small return types.
RequiresSmallResultTypeExtension()74   bool RequiresSmallResultTypeExtension() const OVERRIDE {
75     return false;
76   }
77 
78  protected:
79   size_t NumberOfOutgoingStackArgs() OVERRIDE;
80 
81  private:
82   // TODO: these values aren't unique and can be shared amongst instances
83   std::vector<ManagedRegister> callee_save_regs_;
84 
85   DISALLOW_COPY_AND_ASSIGN(Mips64JniCallingConvention);
86 };
87 
88 }  // namespace mips64
89 }  // namespace art
90 
91 #endif  // ART_COMPILER_JNI_QUICK_MIPS64_CALLING_CONVENTION_MIPS64_H_
92