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 
12 namespace base {
13 
14 // Query information about the processor.
15 class 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.
vendor_name()34   const std::string& vendor_name() const { return cpu_vendor_; }
signature()35   int signature() const { return signature_; }
stepping()36   int stepping() const { return stepping_; }
model()37   int model() const { return model_; }
family()38   int family() const { return family_; }
type()39   int type() const { return type_; }
extended_model()40   int extended_model() const { return ext_model_; }
extended_family()41   int extended_family() const { return ext_family_; }
has_mmx()42   bool has_mmx() const { return has_mmx_; }
has_sse()43   bool has_sse() const { return has_sse_; }
has_sse2()44   bool has_sse2() const { return has_sse2_; }
has_sse3()45   bool has_sse3() const { return has_sse3_; }
has_ssse3()46   bool has_ssse3() const { return has_ssse3_; }
has_sse41()47   bool has_sse41() const { return has_sse41_; }
has_sse42()48   bool has_sse42() const { return has_sse42_; }
has_avx()49   bool has_avx() const { return has_avx_; }
has_avx2()50   bool has_avx2() const { return has_avx2_; }
has_aesni()51   bool has_aesni() const { return has_aesni_; }
has_non_stop_time_stamp_counter()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
has_broken_neon()58   bool has_broken_neon() const { return has_broken_neon_; }
59 
60   IntelMicroArchitecture GetIntelMicroArchitecture() const;
cpu_brand()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