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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 FINAL : 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   bool CanBeMoved() const OVERRIDE { return true; }
     30 
     31   DECLARE_INSTRUCTION(X86ComputeBaseMethodAddress);
     32 
     33  private:
     34   DISALLOW_COPY_AND_ASSIGN(HX86ComputeBaseMethodAddress);
     35 };
     36 
     37 // Load a constant value from the constant table.
     38 class HX86LoadFromConstantTable FINAL : public HExpression<2> {
     39  public:
     40   HX86LoadFromConstantTable(HX86ComputeBaseMethodAddress* method_base,
     41                             HConstant* constant)
     42       : HExpression(constant->GetType(), SideEffects::None(), kNoDexPc) {
     43     SetRawInputAt(0, method_base);
     44     SetRawInputAt(1, constant);
     45   }
     46 
     47   HX86ComputeBaseMethodAddress* GetBaseMethodAddress() const {
     48     return InputAt(0)->AsX86ComputeBaseMethodAddress();
     49   }
     50 
     51   HConstant* GetConstant() const {
     52     return InputAt(1)->AsConstant();
     53   }
     54 
     55   DECLARE_INSTRUCTION(X86LoadFromConstantTable);
     56 
     57  private:
     58   DISALLOW_COPY_AND_ASSIGN(HX86LoadFromConstantTable);
     59 };
     60 
     61 // Version of HNeg with access to the constant table for FP types.
     62 class HX86FPNeg FINAL : public HExpression<2> {
     63  public:
     64   HX86FPNeg(Primitive::Type result_type,
     65             HInstruction* input,
     66             HX86ComputeBaseMethodAddress* method_base,
     67             uint32_t dex_pc)
     68       : HExpression(result_type, SideEffects::None(), dex_pc) {
     69     DCHECK(Primitive::IsFloatingPointType(result_type));
     70     SetRawInputAt(0, input);
     71     SetRawInputAt(1, method_base);
     72   }
     73 
     74   HX86ComputeBaseMethodAddress* GetBaseMethodAddress() const {
     75     return InputAt(1)->AsX86ComputeBaseMethodAddress();
     76   }
     77 
     78   DECLARE_INSTRUCTION(X86FPNeg);
     79 
     80  private:
     81   DISALLOW_COPY_AND_ASSIGN(HX86FPNeg);
     82 };
     83 
     84 // X86 version of HPackedSwitch that holds a pointer to the base method address.
     85 class HX86PackedSwitch FINAL : public HTemplateInstruction<2> {
     86  public:
     87   HX86PackedSwitch(int32_t start_value,
     88                    int32_t num_entries,
     89                    HInstruction* input,
     90                    HX86ComputeBaseMethodAddress* method_base,
     91                    uint32_t dex_pc)
     92     : HTemplateInstruction(SideEffects::None(), dex_pc),
     93       start_value_(start_value),
     94       num_entries_(num_entries) {
     95     SetRawInputAt(0, input);
     96     SetRawInputAt(1, method_base);
     97   }
     98 
     99   bool IsControlFlow() const OVERRIDE { return true; }
    100 
    101   int32_t GetStartValue() const { return start_value_; }
    102 
    103   int32_t GetNumEntries() const { return num_entries_; }
    104 
    105   HX86ComputeBaseMethodAddress* GetBaseMethodAddress() const {
    106     return InputAt(1)->AsX86ComputeBaseMethodAddress();
    107   }
    108 
    109   HBasicBlock* GetDefaultBlock() const {
    110     // Last entry is the default block.
    111     return GetBlock()->GetSuccessors()[num_entries_];
    112   }
    113 
    114   DECLARE_INSTRUCTION(X86PackedSwitch);
    115 
    116  private:
    117   const int32_t start_value_;
    118   const int32_t num_entries_;
    119 
    120   DISALLOW_COPY_AND_ASSIGN(HX86PackedSwitch);
    121 };
    122 
    123 }  // namespace art
    124 
    125 #endif  // ART_COMPILER_OPTIMIZING_NODES_X86_H_
    126