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      1 /*
      2  * Copyright (C) 2014 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_64_CALLING_CONVENTION_X86_64_H_
     18 #define ART_COMPILER_JNI_QUICK_X86_64_CALLING_CONVENTION_X86_64_H_
     19 
     20 #include "jni/quick/calling_convention.h"
     21 
     22 namespace art {
     23 namespace x86_64 {
     24 
     25 constexpr size_t kFramePointerSize = 8;
     26 
     27 class X86_64ManagedRuntimeCallingConvention FINAL : public ManagedRuntimeCallingConvention {
     28  public:
     29   explicit X86_64ManagedRuntimeCallingConvention(bool is_static, bool is_synchronized,
     30                                               const char* shorty)
     31       : ManagedRuntimeCallingConvention(is_static, is_synchronized, shorty, kFramePointerSize) {}
     32   ~X86_64ManagedRuntimeCallingConvention() 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  private:
     44   ManagedRegisterEntrySpills entry_spills_;
     45   DISALLOW_COPY_AND_ASSIGN(X86_64ManagedRuntimeCallingConvention);
     46 };
     47 
     48 class X86_64JniCallingConvention FINAL : public JniCallingConvention {
     49  public:
     50   explicit X86_64JniCallingConvention(bool is_static, bool is_synchronized, const char* shorty);
     51   ~X86_64JniCallingConvention() OVERRIDE {}
     52   // Calling convention
     53   ManagedRegister ReturnRegister() OVERRIDE;
     54   ManagedRegister IntReturnRegister() OVERRIDE;
     55   ManagedRegister InterproceduralScratchRegister() OVERRIDE;
     56   // JNI calling convention
     57   size_t FrameSize() OVERRIDE;
     58   size_t OutArgSize() OVERRIDE;
     59   const std::vector<ManagedRegister>& CalleeSaveRegisters() const OVERRIDE {
     60     return callee_save_regs_;
     61   }
     62   ManagedRegister ReturnScratchRegister() const OVERRIDE;
     63   uint32_t CoreSpillMask() const OVERRIDE;
     64   uint32_t FpSpillMask() const OVERRIDE;
     65   bool IsCurrentParamInRegister() OVERRIDE;
     66   bool IsCurrentParamOnStack() OVERRIDE;
     67   ManagedRegister CurrentParamRegister() OVERRIDE;
     68   FrameOffset CurrentParamStackOffset() OVERRIDE;
     69 
     70   // x86-64 needs to extend small return types.
     71   bool RequiresSmallResultTypeExtension() const OVERRIDE {
     72     return true;
     73   }
     74 
     75  protected:
     76   size_t NumberOfOutgoingStackArgs() OVERRIDE;
     77 
     78  private:
     79   // TODO: these values aren't unique and can be shared amongst instances
     80   std::vector<ManagedRegister> callee_save_regs_;
     81 
     82   DISALLOW_COPY_AND_ASSIGN(X86_64JniCallingConvention);
     83 };
     84 
     85 }  // namespace x86_64
     86 }  // namespace art
     87 
     88 #endif  // ART_COMPILER_JNI_QUICK_X86_64_CALLING_CONVENTION_X86_64_H_
     89