text: /*
   * Copyright (C) 2014 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifndef ART_RUNTIME_ARCH_MIPS64_INSTRUCTION_SET_FEATURES_MIPS64_H_
  #define ART_RUNTIME_ARCH_MIPS64_INSTRUCTION_SET_FEATURES_MIPS64_H_
  
  #include <museum/8.1.0/art/runtime/arch/instruction_set_features.h>
  
  namespace facebook { namespace museum { namespace MUSEUM_VERSION { namespace art {
  
  class Mips64InstructionSetFeatures;
  using Mips64FeaturesUniquePtr = std::unique_ptr<const Mips64InstructionSetFeatures>;
  
  // Instruction set features relevant to the MIPS64 architecture.
  class Mips64InstructionSetFeatures FINAL : public InstructionSetFeatures {
   public:
    // Process a CPU variant string like "r4000" and create InstructionSetFeatures.
    static Mips64FeaturesUniquePtr FromVariant(const std::string& variant,
                                               std::string* error_msg);
  
    // Parse a bitmap and create an InstructionSetFeatures.
    static Mips64FeaturesUniquePtr FromBitmap(uint32_t bitmap);
  
    // Turn C pre-processor #defines into the equivalent instruction set features.
    static Mips64FeaturesUniquePtr FromCppDefines();
  
    // Process /proc/cpuinfo and use kRuntimeISA to produce InstructionSetFeatures.
    static Mips64FeaturesUniquePtr FromCpuInfo();
  
    // Process the auxiliary vector AT_HWCAP entry and use kRuntimeISA to produce
    // InstructionSetFeatures.
    static Mips64FeaturesUniquePtr FromHwcap();
  
    // Use assembly tests of the current runtime (ie kRuntimeISA) to determine the
    // InstructionSetFeatures. This works around kernel bugs in AT_HWCAP and /proc/cpuinfo.
    static Mips64FeaturesUniquePtr FromAssembly();
  
    bool Equals(const InstructionSetFeatures* other) const OVERRIDE;
  
    InstructionSet GetInstructionSet() const OVERRIDE {
      return kMips64;
    }
  
    uint32_t AsBitmap() const OVERRIDE;
  
    std::string GetFeatureString() const OVERRIDE;
  
    // Does it have MSA (MIPS SIMD Architecture) support.
    bool HasMsa() const {
      return msa_;
    }
  
    virtual ~Mips64InstructionSetFeatures() {}
  
   protected:
    // Parse a vector of the form "fpu32", "mips2" adding these to a new Mips64InstructionSetFeatures.
    std::unique_ptr<const InstructionSetFeatures>
        AddFeaturesFromSplitString(const std::vector<std::string>& features,
                                   std::string* error_msg) const OVERRIDE;
  
   private:
    explicit Mips64InstructionSetFeatures(bool msa) : InstructionSetFeatures(), msa_(msa) {
    }
  
    // Bitmap positions for encoding features as a bitmap.
    enum {
      kMsaBitfield = 1,
    };
  
    const bool msa_;
  
    DISALLOW_COPY_AND_ASSIGN(Mips64InstructionSetFeatures);
  };
  
  } } } } // namespace facebook::museum::MUSEUM_VERSION::art
  
  #endif  // ART_RUNTIME_ARCH_MIPS64_INSTRUCTION_SET_FEATURES_MIPS64_H_
  