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_MEMCMP16_H_
  #define ART_RUNTIME_ARCH_MEMCMP16_H_
  
  #include <museum/7.0.0/external/libcxx/cstddef>
  #include <museum/7.0.0/external/libcxx/cstdint>
  
  // memcmp16 support.
  //
  // This can either be optimized assembly code, in which case we expect a function __memcmp16,
  // or generic C support.
  //
  // In case of the generic support we declare two versions: one in this header file meant to be
  // inlined, and a static version that assembly stubs can link against.
  //
  // In both cases, MemCmp16 is declared.
  
  #if defined(__aarch64__) || defined(__arm__) || defined(__mips__) || defined(__i386__) || defined(__x86_64__)
  
  extern "C" uint32_t __memcmp16(const uint16_t* s0, const uint16_t* s1, size_t count);
  #define MemCmp16 __memcmp16
  
  #else
  
  // This is the generic inlined version.
  static inline int32_t MemCmp16(const uint16_t* s0, const uint16_t* s1, size_t count) {
    for (size_t i = 0; i < count; i++) {
      if (s0[i] != s1[i]) {
        return static_cast<int32_t>(s0[i]) - static_cast<int32_t>(s1[i]);
      }
    }
    return 0;
  }
  
  extern "C" int32_t memcmp16_generic_static(const uint16_t* s0, const uint16_t* s1, size_t count);
  #endif
  
  namespace facebook { namespace museum { namespace MUSEUM_VERSION { namespace art {
  
  namespace testing {
  
  // A version that is exposed and relatively "close to the metal," so that memcmp16_test can do
  // some reasonable testing. Without this, as __memcmp16 is hidden, the test cannot access the
  // implementation.
  int32_t MemCmp16Testing(const uint16_t* s0, const uint16_t* s1, size_t count);
  
  }
  
  } } } } // namespace facebook::museum::MUSEUM_VERSION::art
  
  #endif  // ART_RUNTIME_ARCH_MEMCMP16_H_
  