| // 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_ |
| |
| #include "vm/allocation.h" |
| #include "vm/flags.h" |
| |
| namespace dart { |
| |
| DECLARE_FLAG(bool, use_sse41); |
| |
| class HostCPUFeatures : public AllStatic { |
| public: |
| static void Init(); |
| 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 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 double_truncate_round_supported() { return false; } |
| }; |
| |
| } // namespace dart |
| |
| #endif // RUNTIME_VM_CPU_X64_H_ |