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      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_MIPS_CALLING_CONVENTION_MIPS_H_
     18 #define ART_COMPILER_JNI_QUICK_MIPS_CALLING_CONVENTION_MIPS_H_
     19 
     20 #include "base/enums.h"
     21 #include "jni/quick/calling_convention.h"
     22 
     23 namespace art {
     24 namespace mips {
     25 
     26 constexpr size_t kFramePointerSize = 4;
     27 static_assert(kFramePointerSize == static_cast<size_t>(PointerSize::k32),
     28               "Invalid frame pointer size");
     29 
     30 class MipsManagedRuntimeCallingConvention FINAL : public ManagedRuntimeCallingConvention {
     31  public:
     32   MipsManagedRuntimeCallingConvention(bool is_static, bool is_synchronized, const char* shorty)
     33       : ManagedRuntimeCallingConvention(is_static,
     34                                         is_synchronized,
     35                                         shorty,
     36                                         PointerSize::k32) {}
     37   ~MipsManagedRuntimeCallingConvention() OVERRIDE {}
     38   // Calling convention
     39   ManagedRegister ReturnRegister() OVERRIDE;
     40   ManagedRegister InterproceduralScratchRegister() OVERRIDE;
     41   // Managed runtime calling convention
     42   ManagedRegister MethodRegister() OVERRIDE;
     43   bool IsCurrentParamInRegister() OVERRIDE;
     44   bool IsCurrentParamOnStack() OVERRIDE;
     45   ManagedRegister CurrentParamRegister() OVERRIDE;
     46   FrameOffset CurrentParamStackOffset() OVERRIDE;
     47   const ManagedRegisterEntrySpills& EntrySpills() OVERRIDE;
     48 
     49  private:
     50   ManagedRegisterEntrySpills entry_spills_;
     51 
     52   DISALLOW_COPY_AND_ASSIGN(MipsManagedRuntimeCallingConvention);
     53 };
     54 
     55 class MipsJniCallingConvention FINAL : public JniCallingConvention {
     56  public:
     57   MipsJniCallingConvention(bool is_static,
     58                            bool is_synchronized,
     59                            bool is_critical_native,
     60                            const char* shorty);
     61   ~MipsJniCallingConvention() OVERRIDE {}
     62   // Calling convention
     63   ManagedRegister ReturnRegister() OVERRIDE;
     64   ManagedRegister IntReturnRegister() OVERRIDE;
     65   ManagedRegister InterproceduralScratchRegister() OVERRIDE;
     66   // JNI calling convention
     67   void Next() OVERRIDE;  // Override default behavior for o32.
     68   size_t FrameSize() OVERRIDE;
     69   size_t OutArgSize() OVERRIDE;
     70   ArrayRef<const ManagedRegister> CalleeSaveRegisters() const OVERRIDE;
     71   ManagedRegister ReturnScratchRegister() const OVERRIDE;
     72   uint32_t CoreSpillMask() const OVERRIDE;
     73   uint32_t FpSpillMask() const OVERRIDE;
     74   bool IsCurrentParamInRegister() OVERRIDE;
     75   bool IsCurrentParamOnStack() OVERRIDE;
     76   ManagedRegister CurrentParamRegister() OVERRIDE;
     77   FrameOffset CurrentParamStackOffset() OVERRIDE;
     78 
     79   // Mips does not need to extend small return types.
     80   bool RequiresSmallResultTypeExtension() const OVERRIDE {
     81     return false;
     82   }
     83 
     84  protected:
     85   size_t NumberOfOutgoingStackArgs() OVERRIDE;
     86 
     87  private:
     88   // Padding to ensure longs and doubles are not split in o32.
     89   size_t padding_;
     90   size_t use_fp_arg_registers_;
     91 
     92   DISALLOW_COPY_AND_ASSIGN(MipsJniCallingConvention);
     93 };
     94 
     95 }  // namespace mips
     96 }  // namespace art
     97 
     98 #endif  // ART_COMPILER_JNI_QUICK_MIPS_CALLING_CONVENTION_MIPS_H_
     99