Ben Konyi
07852532e3
Change-Id: I6dc02b3d9de16cc176eb97613bc0c7f0bb9b16eb Reviewed-on: https://dart-review.googlesource.com/77013 Commit-Queue: Ben Konyi <bkonyi@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com> Auto-Submit: Ben Konyi <bkonyi@google.com>
56 lines
1.6 KiB
C++
56 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 RUNTIME_VM_CPU_X64_H_
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#define RUNTIME_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 Init();
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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 Init() { HostCPUFeatures::Init(); }
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static void Cleanup() { HostCPUFeatures::Cleanup(); }
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static const char* hardware() { return HostCPUFeatures::hardware(); }
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static bool sse2_supported() { return HostCPUFeatures::sse2_supported(); }
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static bool sse4_1_supported() { return HostCPUFeatures::sse4_1_supported(); }
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static bool double_truncate_round_supported() { return false; }
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};
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} // namespace dart
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#endif // RUNTIME_VM_CPU_X64_H_
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