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    AVX2,
30    MAX_INTEL_MICRO_ARCHITECTURE
31  };
32
33  // Accessors for CPU information.
34  const std::string& vendor_name() const { return cpu_vendor_; }
35  int signature() const { return signature_; }
36  int stepping() const { return stepping_; }
37  int model() const { return model_; }
38  int family() const { return family_; }
39  int type() const { return type_; }
40  int extended_model() const { return ext_model_; }
41  int extended_family() const { return ext_family_; }
42  bool has_mmx() const { return has_mmx_; }
43  bool has_sse() const { return has_sse_; }
44  bool has_sse2() const { return has_sse2_; }
45  bool has_sse3() const { return has_sse3_; }
46  bool has_ssse3() const { return has_ssse3_; }
47  bool has_sse41() const { return has_sse41_; }
48  bool has_sse42() const { return has_sse42_; }
49  bool has_avx() const { return has_avx_; }
50  bool has_avx2() const { return has_avx2_; }
51  bool has_aesni() const { return has_aesni_; }
52  bool has_non_stop_time_stamp_counter() const {
53    return has_non_stop_time_stamp_counter_;
54  }
55  // has_broken_neon is only valid on ARM chips. If true, it indicates that we
56  // believe that the NEON unit on the current CPU is flawed and cannot execute
57  // some code. See https://code.google.com/p/chromium/issues/detail?id=341598
58  bool has_broken_neon() const { return has_broken_neon_; }
59
60  IntelMicroArchitecture GetIntelMicroArchitecture() const;
61  const std::string& cpu_brand() const { return cpu_brand_; }
62
63 private:
64  // Query the processor for CPUID information.
65  void Initialize();
66
67  int signature_;  // raw form of type, family, model, and stepping
68  int type_;  // process type
69  int family_;  // family of the processor
70  int model_;  // model of processor
71  int stepping_;  // processor revision number
72  int ext_model_;
73  int ext_family_;
74  bool has_mmx_;
75  bool has_sse_;
76  bool has_sse2_;
77  bool has_sse3_;
78  bool has_ssse3_;
79  bool has_sse41_;
80  bool has_sse42_;
81  bool has_avx_;
82  bool has_avx2_;
83  bool has_aesni_;
84  bool has_non_stop_time_stamp_counter_;
85  bool has_broken_neon_;
86  std::string cpu_vendor_;
87  std::string cpu_brand_;
88};
89
90}  // namespace base
91
92#endif  // BASE_CPU_H_
93