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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_CPU_H_
#define BASE_CPU_H_
#include <string>
#include "base/base_export.h"
namespace base {
// Query information about the processor.
// Constructor
enum IntelMicroArchitecture {
// Accessors for CPU information.
const std::string& vendor_name() const { return cpu_vendor_; }
int signature() const { return signature_; }
int stepping() const { return stepping_; }
int model() const { return model_; }
int family() const { return family_; }
int type() const { return type_; }
int extended_model() const { return ext_model_; }
int extended_family() const { return ext_family_; }
bool has_mmx() const { return has_mmx_; }
bool has_sse() const { return has_sse_; }
bool has_sse2() const { return has_sse2_; }
bool has_sse3() const { return has_sse3_; }
bool has_ssse3() const { return has_ssse3_; }
bool has_sse41() const { return has_sse41_; }
bool has_sse42() const { return has_sse42_; }
bool has_avx() const { return has_avx_; }
// has_avx_hardware returns true when AVX is present in the CPU. This might
// differ from the value of |has_avx()| because |has_avx()| also tests for
// operating system support needed to actually call AVX instuctions.
// Note: you should never need to call this function. It was added in order
// to workaround a bug in NSS but |has_avx()| is what you want.
bool has_avx_hardware() const { return has_avx_hardware_; }
bool has_aesni() const { return has_aesni_; }
bool has_non_stop_time_stamp_counter() const {
return has_non_stop_time_stamp_counter_;
// has_broken_neon is only valid on ARM chips. If true, it indicates that we
// believe that the NEON unit on the current CPU is flawed and cannot execute
// some code. See
bool has_broken_neon() const { return has_broken_neon_; }
IntelMicroArchitecture GetIntelMicroArchitecture() const;
const std::string& cpu_brand() const { return cpu_brand_; }
// Query the processor for CPUID information.
void Initialize();
int signature_; // raw form of type, family, model, and stepping
int type_; // process type
int family_; // family of the processor
int model_; // model of processor
int stepping_; // processor revision number
int ext_model_;
int ext_family_;
bool has_mmx_;
bool has_sse_;
bool has_sse2_;
bool has_sse3_;
bool has_ssse3_;
bool has_sse41_;
bool has_sse42_;
bool has_avx_;
bool has_avx_hardware_;
bool has_aesni_;
bool has_non_stop_time_stamp_counter_;
bool has_broken_neon_;
std::string cpu_vendor_;
std::string cpu_brand_;
} // namespace base
#endif // BASE_CPU_H_