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. 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
