15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef BASE_CPU_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define BASE_CPU_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/base_export.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Query information about the processor. 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class BASE_EXPORT CPU { 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Constructor 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CPU(); 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) enum IntelMicroArchitecture { 212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) PENTIUM, 222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SSE, 232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SSE2, 242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SSE3, 252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SSSE3, 262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SSE41, 272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SSE42, 282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) AVX, 292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) MAX_INTEL_MICRO_ARCHITECTURE 302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) }; 312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Accessors for CPU information. 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string& vendor_name() const { return cpu_vendor_; } 34ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch int signature() const { return signature_; } 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int stepping() const { return stepping_; } 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int model() const { return model_; } 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int family() const { return family_; } 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int type() const { return type_; } 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int extended_model() const { return ext_model_; } 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int extended_family() const { return ext_family_; } 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_mmx() const { return has_mmx_; } 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_sse() const { return has_sse_; } 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_sse2() const { return has_sse2_; } 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_sse3() const { return has_sse3_; } 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_ssse3() const { return has_ssse3_; } 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_sse41() const { return has_sse41_; } 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_sse42() const { return has_sse42_; } 482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool has_avx() const { return has_avx_; } 49f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // has_avx_hardware returns true when AVX is present in the CPU. This might 50f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // differ from the value of |has_avx()| because |has_avx()| also tests for 51f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // operating system support needed to actually call AVX instuctions. 52f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // Note: you should never need to call this function. It was added in order 53f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // to workaround a bug in NSS but |has_avx()| is what you want. 54f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) bool has_avx_hardware() const { return has_avx_hardware_; } 55a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) bool has_aesni() const { return has_aesni_; } 56c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) bool has_non_stop_time_stamp_counter() const { 57c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return has_non_stop_time_stamp_counter_; 58c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) } 596e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // has_broken_neon is only valid on ARM chips. If true, it indicates that we 606e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // believe that the NEON unit on the current CPU is flawed and cannot execute 616e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) // some code. See https://code.google.com/p/chromium/issues/detail?id=341598 626e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) bool has_broken_neon() const { return has_broken_neon_; } 636e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) 642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) IntelMicroArchitecture GetIntelMicroArchitecture() const; 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string& cpu_brand() const { return cpu_brand_; } 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Query the processor for CPUID information. 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void Initialize(); 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 71ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch int signature_; // raw form of type, family, model, and stepping 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int type_; // process type 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int family_; // family of the processor 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int model_; // model of processor 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int stepping_; // processor revision number 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int ext_model_; 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int ext_family_; 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_mmx_; 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_sse_; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_sse2_; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_sse3_; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_ssse3_; 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_sse41_; 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool has_sse42_; 852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool has_avx_; 86f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) bool has_avx_hardware_; 87a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) bool has_aesni_; 88c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) bool has_non_stop_time_stamp_counter_; 896e8cce623b6e4fe0c9e4af605d675dd9d0338c38Torne (Richard Coles) bool has_broken_neon_; 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string cpu_vendor_; 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string cpu_brand_; 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // BASE_CPU_H_ 97