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Like HOST_ARCH_*, HOST_OS_* describes the OS the VM is running on, which may be different from the OS the VM is generating code for during AOT compilation. Currently we conflate the two when emitting AOT as assembly, and we get away with it because Flutter only uses assembly for targeting iOS and one can only target iOS from a Mac, but we expect to use assembly for Android as well so native tools can unwind Dart frames. R=zra@google.com Review-Url: https://codereview.chromium.org/2750843003 .
48 lines
1.2 KiB
C++
48 lines
1.2 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_CPUID_H_
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#define RUNTIME_VM_CPUID_H_
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#include "vm/globals.h"
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#if !defined(HOST_OS_MACOS)
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#include "vm/allocation.h"
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#include "vm/cpuinfo.h"
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namespace dart {
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class CpuId : public AllStatic {
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public:
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#if defined(HOST_ARCH_IA32) || defined(HOST_ARCH_X64)
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static void InitOnce();
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static void Cleanup();
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// Caller must free the result of field.
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static const char* field(CpuInfoIndices idx);
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#else
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static void InitOnce() {}
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static void Cleanup() {}
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static const char* field(CpuInfoIndices idx) { return NULL; }
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#endif
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private:
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// Caller must free the result of id_string and brand_string.
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static const char* id_string();
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static const char* brand_string();
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static bool sse2() { return sse2_; }
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static bool sse41() { return sse41_; }
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static bool sse2_;
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static bool sse41_;
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static const char* id_string_;
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static const char* brand_string_;
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static void GetCpuId(int32_t level, uint32_t info[4]);
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};
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} // namespace dart
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#endif // !defined(HOST_OS_MACOS)
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#endif // RUNTIME_VM_CPUID_H_
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