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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 VM_CPU_X64_H_
#define VM_CPU_X64_H_
#include "vm/allocation.h"
#include "vm/flags.h"
namespace dart {
DECLARE_FLAG(bool, use_sse41);
class HostCPUFeatures : public AllStatic {
public:
static void InitOnce();
static void Cleanup();
static const char* hardware() {
DEBUG_ASSERT(initialized_);
return hardware_;
}
static bool sse2_supported() {
DEBUG_ASSERT(initialized_);
return sse2_supported_;
}
static bool sse4_1_supported() {
DEBUG_ASSERT(initialized_);
return sse4_1_supported_ && FLAG_use_sse41;
}
private:
static const uint64_t kSSE2BitMask = static_cast<uint64_t>(1) << 26;
static const uint64_t kSSE4_1BitMask = static_cast<uint64_t>(1) << 51;
static const char* hardware_;
static bool sse2_supported_;
static bool sse4_1_supported_;
#if defined(DEBUG)
static bool initialized_;
#endif
};
class TargetCPUFeatures : public AllStatic {
public:
static void InitOnce() {
HostCPUFeatures::InitOnce();
}
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 double_truncate_round_supported() {
return false;
}
};
} // namespace dart
#endif // VM_CPU_X64_H_