mirror of
https://github.com/dart-lang/sdk
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fd366da1cf
with fix that uses cpuid for Intel/Linux. R=asiva@google.com Review URL: https://codereview.chromium.org//136303012 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@32980 260f80e4-7a28-3924-810f-c04153c831b5
67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_CPU_X64_H_
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#define VM_CPU_X64_H_
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#include "vm/allocation.h"
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#include "vm/flags.h"
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namespace dart {
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DECLARE_FLAG(bool, use_sse41);
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class HostCPUFeatures : public AllStatic {
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public:
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static void InitOnce();
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static void Cleanup();
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static const char* hardware() {
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DEBUG_ASSERT(initialized_);
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return hardware_;
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}
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static bool sse2_supported() {
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DEBUG_ASSERT(initialized_);
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return sse2_supported_;
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}
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static bool sse4_1_supported() {
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DEBUG_ASSERT(initialized_);
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return sse4_1_supported_ && FLAG_use_sse41;
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}
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private:
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static const uint64_t kSSE2BitMask = static_cast<uint64_t>(1) << 26;
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static const uint64_t kSSE4_1BitMask = static_cast<uint64_t>(1) << 51;
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static const char* hardware_;
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static bool sse2_supported_;
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static bool sse4_1_supported_;
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#if defined(DEBUG)
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static bool initialized_;
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#endif
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};
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class TargetCPUFeatures : public AllStatic {
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public:
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static void InitOnce() {
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HostCPUFeatures::InitOnce();
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}
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static void Cleanup() {
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HostCPUFeatures::Cleanup();
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}
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static const char* hardware() {
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return HostCPUFeatures::hardware();
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}
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static bool sse2_supported() {
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return HostCPUFeatures::sse2_supported();
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}
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static bool sse4_1_supported() {
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return HostCPUFeatures::sse4_1_supported();
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}
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static bool double_truncate_round_supported() {
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return false;
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}
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};
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} // namespace dart
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#endif // VM_CPU_X64_H_
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