1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef BASE_CPU_H_
6#define BASE_CPU_H_
7
8#include <string>
9
10#include "base/base_export.h"
11
12namespace base {
13
14// Query information about the processor.
15class BASE_EXPORT CPU {
16 public:
17  // Constructor
18  CPU();
19
20  enum IntelMicroArchitecture {
21    PENTIUM,
22    SSE,
23    SSE2,
24    SSE3,
25    SSSE3,
26    SSE41,
27    SSE42,
28    AVX,
29    MAX_INTEL_MICRO_ARCHITECTURE
30  };
31
32  // Accessors for CPU information.
33  const std::string& vendor_name() const { return cpu_vendor_; }
34  int signature() const { return signature_; }
35  int stepping() const { return stepping_; }
36  int model() const { return model_; }
37  int family() const { return family_; }
38  int type() const { return type_; }
39  int extended_model() const { return ext_model_; }
40  int extended_family() const { return ext_family_; }
41  bool has_mmx() const { return has_mmx_; }
42  bool has_sse() const { return has_sse_; }
43  bool has_sse2() const { return has_sse2_; }
44  bool has_sse3() const { return has_sse3_; }
45  bool has_ssse3() const { return has_ssse3_; }
46  bool has_sse41() const { return has_sse41_; }
47  bool has_sse42() const { return has_sse42_; }
48  bool has_avx() const { return has_avx_; }
49  // has_avx_hardware returns true when AVX is present in the CPU. This might
50  // differ from the value of |has_avx()| because |has_avx()| also tests for
51  // operating system support needed to actually call AVX instuctions.
52  // Note: you should never need to call this function. It was added in order
53  // to workaround a bug in NSS but |has_avx()| is what you want.
54  bool has_avx_hardware() const { return has_avx_hardware_; }
55  bool has_aesni() const { return has_aesni_; }
56  bool has_non_stop_time_stamp_counter() const {
57    return has_non_stop_time_stamp_counter_;
58  }
59  IntelMicroArchitecture GetIntelMicroArchitecture() const;
60  const std::string& cpu_brand() const { return cpu_brand_; }
61
62 private:
63  // Query the processor for CPUID information.
64  void Initialize();
65
66  int signature_;  // raw form of type, family, model, and stepping
67  int type_;  // process type
68  int family_;  // family of the processor
69  int model_;  // model of processor
70  int stepping_;  // processor revision number
71  int ext_model_;
72  int ext_family_;
73  bool has_mmx_;
74  bool has_sse_;
75  bool has_sse2_;
76  bool has_sse3_;
77  bool has_ssse3_;
78  bool has_sse41_;
79  bool has_sse42_;
80  bool has_avx_;
81  bool has_avx_hardware_;
82  bool has_aesni_;
83  bool has_non_stop_time_stamp_counter_;
84  std::string cpu_vendor_;
85  std::string cpu_brand_;
86};
87
88}  // namespace base
89
90#endif  // BASE_CPU_H_
91