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// Copyright (c) 2014, 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.
#ifndef RUNTIME_VM_CPU_X64_H_
#define RUNTIME_VM_CPU_X64_H_
#if !defined(RUNTIME_VM_CPU_H_)
#error Do not include cpu_x64.h directly; use cpu.h instead.
#include "vm/allocation.h"
#include "vm/flags.h"
namespace dart {
DECLARE_FLAG(bool, use_sse41);
class HostCPUFeatures : public AllStatic {
static void Init();
static void Cleanup();
static const char* hardware() {
return hardware_;
static bool sse2_supported() {
return sse2_supported_;
static bool sse4_1_supported() {
return sse4_1_supported_ && FLAG_use_sse41 && !FLAG_target_unknown_cpu;
static bool popcnt_supported() {
return popcnt_supported_ && !FLAG_target_unknown_cpu;
static bool abm_supported() {
return abm_supported_ && !FLAG_target_unknown_cpu;
static const char* hardware_;
static bool sse2_supported_;
static bool sse4_1_supported_;
static bool popcnt_supported_;
static bool abm_supported_;
#if defined(DEBUG)
static bool initialized_;
class TargetCPUFeatures : public AllStatic {
static void Init() { HostCPUFeatures::Init(); }
static void Cleanup() { HostCPUFeatures::Cleanup(); }
static const char* hardware() { return HostCPUFeatures::hardware(); }
static bool sse2_supported() { return HostCPUFeatures::sse2_supported(); }
static bool sse4_1_supported() { return HostCPUFeatures::sse4_1_supported(); }
static bool popcnt_supported() { return HostCPUFeatures::popcnt_supported(); }
static bool abm_supported() { return HostCPUFeatures::abm_supported(); }
static bool double_truncate_round_supported() {
return HostCPUFeatures::sse4_1_supported();
} // namespace dart
#endif // RUNTIME_VM_CPU_X64_H_