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| 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 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 // has_broken_neon is only valid on ARM chips. If true, it indicates that we | |
| 60 // believe that the NEON unit on the current CPU is flawed and cannot execute | |
| 61 // some code. See https://code.google.com/p/chromium/issues/detail?id=341598 | |
| 62 bool has_broken_neon() const { return has_broken_neon_; } | |
| 63 | |
| 64 IntelMicroArchitecture GetIntelMicroArchitecture() const; | |
| 65 const std::string& cpu_brand() const { return cpu_brand_; } | |
| 66 | |
| 67 private: | |
| 68 // Query the processor for CPUID information. | |
| 69 void Initialize(); | |
| 70 | |
| 71 int signature_; // raw form of type, family, model, and stepping | |
| 72 int type_; // process type | |
| 73 int family_; // family of the processor | |
| 74 int model_; // model of processor | |
| 75 int stepping_; // processor revision number | |
| 76 int ext_model_; | |
| 77 int ext_family_; | |
| 78 bool has_mmx_; | |
| 79 bool has_sse_; | |
| 80 bool has_sse2_; | |
| 81 bool has_sse3_; | |
| 82 bool has_ssse3_; | |
| 83 bool has_sse41_; | |
| 84 bool has_sse42_; | |
| 85 bool has_avx_; | |
| 86 bool has_avx_hardware_; | |
| 87 bool has_aesni_; | |
| 88 bool has_non_stop_time_stamp_counter_; | |
| 89 bool has_broken_neon_; | |
| 90 std::string cpu_vendor_; | |
| 91 std::string cpu_brand_; | |
| 92 }; | |
| 93 | |
| 94 } // namespace base | |
| 95 | |
| 96 #endif // BASE_CPU_H_ | |
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