cpu_x64.cc

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// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
 
#include "vm/globals.h"
#if defined(TARGET_ARCH_X64)
 
#include "vm/cpu.h"
#include "vm/cpu_x64.h"
 
#include "vm/cpuinfo.h"
 
namespace dart {
 
DEFINE_FLAG(bool, use_sse41, true, "Use SSE 4.1 if available");
 
void CPU::FlushICache(uword start, uword size) {
  // Nothing to be done here.
}
 
const char* CPU::Id() {
  return
#if defined(USING_SIMULATOR)
      "sim"
#endif  // !defined(USING_SIMULATOR)
      "x64";
}
 
const char* HostCPUFeatures::hardware_ = nullptr;
bool HostCPUFeatures::sse2_supported_ = true;
bool HostCPUFeatures::sse4_1_supported_ = false;
bool HostCPUFeatures::popcnt_supported_ = false;
bool HostCPUFeatures::abm_supported_ = false;
 
#if defined(DEBUG)
bool HostCPUFeatures::initialized_ = false;
#endif
 
#if !defined(USING_SIMULATOR)
void HostCPUFeatures::Init() {
  CpuInfo::Init();
  hardware_ = CpuInfo::GetCpuModel();
  sse4_1_supported_ = CpuInfo::FieldContains(kCpuInfoFeatures, "sse4_1") ||
                      CpuInfo::FieldContains(kCpuInfoFeatures, "sse4.1");
  popcnt_supported_ = CpuInfo::FieldContains(kCpuInfoFeatures, "popcnt");
  abm_supported_ = CpuInfo::FieldContains(kCpuInfoFeatures, "abm");
#if defined(DEBUG)
  initialized_ = true;
#endif
}
 
void HostCPUFeatures::Cleanup() {
  DEBUG_ASSERT(initialized_);
#if defined(DEBUG)
  initialized_ = false;
#endif
  ASSERT(hardware_ != nullptr);
  free(const_cast<char*>(hardware_));
  hardware_ = nullptr;
  CpuInfo::Cleanup();
}
 
#else  // !defined(USING_SIMULATOR)
 
void HostCPUFeatures::Init() {
  CpuInfo::Init();
  hardware_ = CpuInfo::GetCpuModel();
  sse4_1_supported_ = false;
  popcnt_supported_ = false;
  abm_supported_ = false;
#if defined(DEBUG)
  initialized_ = true;
#endif
}
 
void HostCPUFeatures::Cleanup() {
  DEBUG_ASSERT(initialized_);
#if defined(DEBUG)
  initialized_ = false;
#endif
  ASSERT(hardware_ != nullptr);
  free(const_cast<char*>(hardware_));
  hardware_ = nullptr;
  CpuInfo::Cleanup();
}
#endif  // !defined(USING_SIMULATOR)
 
}  // namespace dart
 
#endif  // defined TARGET_ARCH_X64