Aart Bik
0ad30fafc1
Rationale: We are adding library support for bit operations: lowZeroBitCount/highZeroBitCount/nonZeroBitCount The added features will enable very efficient direct native implementations of these operations in the DartVM codegen. https://github.com/dart-lang/sdk/issues/38346 Change-Id: Id734a7590666c6abdc2a683a240094c6bf6cd46a Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/117768 Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Aart Bik <ajcbik@google.com>
53 lines
1.3 KiB
C++
53 lines
1.3 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 Init();
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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 Init() {}
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static void Cleanup() {}
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static const char* field(CpuInfoIndices idx) { return nullptr; }
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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 popcnt() { return popcnt_; }
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static bool abm() { return abm_; }
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static bool sse2_;
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static bool sse41_;
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static bool popcnt_;
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static bool abm_;
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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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