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      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_OPTIMIZING_NODES_X86_H_
     18 #define ART_COMPILER_OPTIMIZING_NODES_X86_H_
     19 
     20 namespace art {
     21 
     22 // Compute the address of the method for X86 Constant area support.
     23 class HX86ComputeBaseMethodAddress : public HExpression<0> {
     24  public:
     25   // Treat the value as an int32_t, but it is really a 32 bit native pointer.
     26   HX86ComputeBaseMethodAddress()
     27       : HExpression(Primitive::kPrimInt, SideEffects::None(), kNoDexPc) {}
     28 
     29   DECLARE_INSTRUCTION(X86ComputeBaseMethodAddress);
     30 
     31  private:
     32   DISALLOW_COPY_AND_ASSIGN(HX86ComputeBaseMethodAddress);
     33 };
     34 
     35 // Load a constant value from the constant table.
     36 class HX86LoadFromConstantTable : public HExpression<2> {
     37  public:
     38   HX86LoadFromConstantTable(HX86ComputeBaseMethodAddress* method_base,
     39                             HConstant* constant)
     40       : HExpression(constant->GetType(), SideEffects::None(), kNoDexPc) {
     41     SetRawInputAt(0, method_base);
     42     SetRawInputAt(1, constant);
     43   }
     44 
     45   HX86ComputeBaseMethodAddress* GetBaseMethodAddress() const {
     46     return InputAt(0)->AsX86ComputeBaseMethodAddress();
     47   }
     48 
     49   HConstant* GetConstant() const {
     50     return InputAt(1)->AsConstant();
     51   }
     52 
     53   DECLARE_INSTRUCTION(X86LoadFromConstantTable);
     54 
     55  private:
     56   DISALLOW_COPY_AND_ASSIGN(HX86LoadFromConstantTable);
     57 };
     58 
     59 // Version of HNeg with access to the constant table for FP types.
     60 class HX86FPNeg : public HExpression<2> {
     61  public:
     62   HX86FPNeg(Primitive::Type result_type,
     63             HInstruction* input,
     64             HX86ComputeBaseMethodAddress* method_base,
     65             uint32_t dex_pc)
     66       : HExpression(result_type, SideEffects::None(), dex_pc) {
     67     DCHECK(Primitive::IsFloatingPointType(result_type));
     68     SetRawInputAt(0, input);
     69     SetRawInputAt(1, method_base);
     70   }
     71 
     72   DECLARE_INSTRUCTION(X86FPNeg);
     73 
     74  private:
     75   DISALLOW_COPY_AND_ASSIGN(HX86FPNeg);
     76 };
     77 
     78 // X86 version of HPackedSwitch that holds a pointer to the base method address.
     79 class HX86PackedSwitch : public HTemplateInstruction<2> {
     80  public:
     81   HX86PackedSwitch(int32_t start_value,
     82                    int32_t num_entries,
     83                    HInstruction* input,
     84                    HX86ComputeBaseMethodAddress* method_base,
     85                    uint32_t dex_pc)
     86     : HTemplateInstruction(SideEffects::None(), dex_pc),
     87       start_value_(start_value),
     88       num_entries_(num_entries) {
     89     SetRawInputAt(0, input);
     90     SetRawInputAt(1, method_base);
     91   }
     92 
     93   bool IsControlFlow() const OVERRIDE { return true; }
     94 
     95   int32_t GetStartValue() const { return start_value_; }
     96 
     97   int32_t GetNumEntries() const { return num_entries_; }
     98 
     99   HX86ComputeBaseMethodAddress* GetBaseMethodAddress() const {
    100     return InputAt(1)->AsX86ComputeBaseMethodAddress();
    101   }
    102 
    103   HBasicBlock* GetDefaultBlock() const {
    104     // Last entry is the default block.
    105     return GetBlock()->GetSuccessors()[num_entries_];
    106   }
    107 
    108   DECLARE_INSTRUCTION(X86PackedSwitch);
    109 
    110  private:
    111   const int32_t start_value_;
    112   const int32_t num_entries_;
    113 
    114   DISALLOW_COPY_AND_ASSIGN(HX86PackedSwitch);
    115 };
    116 
    117 }  // namespace art
    118 
    119 #endif  // ART_COMPILER_OPTIMIZING_NODES_X86_H_
    120