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)#include "base/cpu.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string.h> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <algorithm> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "base/basictypes.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "build/build_config.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu#if defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || defined(OS_LINUX)) 155c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu#include "base/file_util.h" 165c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu#include "base/lazy_instance.h" 175c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu#endif 185c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(ARCH_CPU_X86_FAMILY) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(_MSC_VER) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <intrin.h> 22f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include <immintrin.h> // For _xgetbv() 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)CPU::CPU() 29ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch : signature_(0), 30ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch type_(0), 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) family_(0), 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) model_(0), 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) stepping_(0), 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ext_model_(0), 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ext_family_(0), 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_mmx_(false), 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_sse_(false), 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_sse2_(false), 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_sse3_(false), 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_ssse3_(false), 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_sse41_(false), 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_sse42_(false), 43f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) has_avx_(false), 44f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) has_avx_hardware_(false), 45a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) has_aesni_(false), 46c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) has_non_stop_time_stamp_counter_(false), 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cpu_vendor_("unknown") { 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Initialize(); 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 51f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)namespace { 52f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(ARCH_CPU_X86_FAMILY) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef _MSC_VER 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(__pic__) && defined(__i386__) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void __cpuid(int cpu_info[4], int info_type) { 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) __asm__ volatile ( 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "mov %%ebx, %%edi\n" 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "cpuid\n" 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "xchg %%edi, %%ebx\n" 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : "a"(info_type) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ); 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void __cpuid(int cpu_info[4], int info_type) { 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) __asm__ volatile ( 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "cpuid \n\t" 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : "a"(info_type) 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ); 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 78f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#endif 79f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 80f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// _xgetbv returns the value of an Intel Extended Control Register (XCR). 81f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// Currently only XCR0 is defined by Intel so |xcr| should always be zero. 82f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)uint64 _xgetbv(uint32 xcr) { 83f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) uint32 eax, edx; 84f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 85f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) __asm__ volatile ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (xcr)); 86f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) return (static_cast<uint64>(edx) << 32) | eax; 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 89f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#endif // !_MSC_VER 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // ARCH_CPU_X86_FAMILY 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 925c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu#if defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || defined(OS_LINUX)) 935c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 94010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)// Returns the string found in /proc/cpuinfo under the key "model name" or 95010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)// "Processor". "model name" is used in Linux 3.8 and later (3.7 and later for 96010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)// arm64) and is shown once per CPU. "Processor" is used in earler versions and 97010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)// is shown only once at the top of /proc/cpuinfo regardless of the number CPUs. 985c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liustd::string ParseCpuInfo() { 99010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) const char kModelNamePrefix[] = "model name\t: "; 100010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) const char kProcessorPrefix[] = "Processor\t: "; 101010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) std::string contents; 1025c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu ReadFileToString(FilePath("/proc/cpuinfo"), &contents); 1035c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu DCHECK(!contents.empty()); 104010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) std::string cpu_brand; 1055c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (!contents.empty()) { 1065c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu std::istringstream iss(contents); 1075c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu std::string line; 1085c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu while (std::getline(iss, line)) { 109010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (line.compare(0, strlen(kModelNamePrefix), kModelNamePrefix) == 0) { 110010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) cpu_brand.assign(line.substr(strlen(kModelNamePrefix))); 111010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) break; 112010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) } 1135c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (line.compare(0, strlen(kProcessorPrefix), kProcessorPrefix) == 0) { 114010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) cpu_brand.assign(line.substr(strlen(kProcessorPrefix))); 115010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) break; 1165c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu } 1175c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu } 1185c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu } 1195c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return cpu_brand; 1205c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu} 1215c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 1225c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liuclass LazyCpuInfoValue { 1235c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu public: 1245c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu LazyCpuInfoValue() : value_(ParseCpuInfo()) {} 1255c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu const std::string& value() { return value_; } 1265c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 1275c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu private: 1285c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu const std::string value_; 1295c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu DISALLOW_COPY_AND_ASSIGN(LazyCpuInfoValue); 1305c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu}; 1315c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 1325c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liubase::LazyInstance<LazyCpuInfoValue> g_lazy_cpu_brand = 1335c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu LAZY_INSTANCE_INITIALIZER; 1345c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 1355c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liuconst std::string& CpuBrandInfo() { 1365c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return g_lazy_cpu_brand.Get().value(); 1375c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu} 1385c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 1395c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu#endif // defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || 1405c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // defined(OS_LINUX)) 1415c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 142f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)} // anonymous namespace 143f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CPU::Initialize() { 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(ARCH_CPU_X86_FAMILY) 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int cpu_info[4] = {-1}; 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char cpu_string[48]; 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // __cpuid with an InfoType argument of 0 returns the number of 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // valid Ids in CPUInfo[0] and the CPU identification string in 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the other three array elements. The CPU identification string is 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // not in linear order. The code below arranges the information 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // in a human readable form. The human readable order is CPUInfo[1] | 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // CPUInfo[3] | CPUInfo[2]. CPUInfo[2] and CPUInfo[3] are swapped 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // before using memcpy to copy these three array elements to cpu_string. 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) __cpuid(cpu_info, 0); 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int num_ids = cpu_info[0]; 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::swap(cpu_info[2], cpu_info[3]); 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(cpu_string, &cpu_info[1], 3 * sizeof(cpu_info[1])); 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cpu_vendor_.assign(cpu_string, 3 * sizeof(cpu_info[1])); 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Interpret CPU feature information. 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (num_ids > 0) { 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) __cpuid(cpu_info, 1); 165ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch signature_ = cpu_info[0]; 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) stepping_ = cpu_info[0] & 0xf; 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) model_ = ((cpu_info[0] >> 4) & 0xf) + ((cpu_info[0] >> 12) & 0xf0); 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) family_ = (cpu_info[0] >> 8) & 0xf; 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) type_ = (cpu_info[0] >> 12) & 0x3; 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ext_model_ = (cpu_info[0] >> 16) & 0xf; 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ext_family_ = (cpu_info[0] >> 20) & 0xff; 172f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) has_mmx_ = (cpu_info[3] & 0x00800000) != 0; 173f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) has_sse_ = (cpu_info[3] & 0x02000000) != 0; 174f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) has_sse2_ = (cpu_info[3] & 0x04000000) != 0; 175f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) has_sse3_ = (cpu_info[2] & 0x00000001) != 0; 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_ssse3_ = (cpu_info[2] & 0x00000200) != 0; 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_sse41_ = (cpu_info[2] & 0x00080000) != 0; 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) has_sse42_ = (cpu_info[2] & 0x00100000) != 0; 179f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) has_avx_hardware_ = 180f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) (cpu_info[2] & 0x10000000) != 0; 181f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // AVX instructions will generate an illegal instruction exception unless 182f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // a) they are supported by the CPU, 183f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // b) XSAVE is supported by the CPU and 184f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // c) XSAVE is enabled by the kernel. 185f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) // See http://software.intel.com/en-us/blogs/2011/04/14/is-avx-enabled 186cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // 187cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // In addition, we have observed some crashes with the xgetbv instruction 188cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // even after following Intel's example code. (See crbug.com/375968.) 189cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Because of that, we also test the XSAVE bit because its description in 190cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // the CPUID documentation suggests that it signals xgetbv support. 191f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) has_avx_ = 192f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) has_avx_hardware_ && 193cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) (cpu_info[2] & 0x04000000) != 0 /* XSAVE */ && 194f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) (cpu_info[2] & 0x08000000) != 0 /* OSXSAVE */ && 195f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) (_xgetbv(0) & 6) == 6 /* XSAVE enabled by kernel */; 196a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) has_aesni_ = (cpu_info[2] & 0x02000000) != 0; 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Get the brand string of the cpu. 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) __cpuid(cpu_info, 0x80000000); 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int parameter_end = 0x80000004; 202c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) int max_parameter = cpu_info[0]; 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (cpu_info[0] >= parameter_end) { 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char* cpu_string_ptr = cpu_string; 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int parameter = 0x80000002; parameter <= parameter_end && 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cpu_string_ptr < &cpu_string[sizeof(cpu_string)]; parameter++) { 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) __cpuid(cpu_info, parameter); 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(cpu_string_ptr, cpu_info, sizeof(cpu_info)); 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cpu_string_ptr += sizeof(cpu_info); 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cpu_brand_.assign(cpu_string, cpu_string_ptr - cpu_string); 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 215c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 216c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) const int parameter_containing_non_stop_time_stamp_counter = 0x80000007; 217c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (max_parameter >= parameter_containing_non_stop_time_stamp_counter) { 218c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) __cpuid(cpu_info, parameter_containing_non_stop_time_stamp_counter); 219c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) has_non_stop_time_stamp_counter_ = (cpu_info[3] & (1 << 8)) != 0; 220c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) } 2215c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu#elif defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || defined(OS_LINUX)) 2225c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu cpu_brand_.assign(CpuBrandInfo()); 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)CPU::IntelMicroArchitecture CPU::GetIntelMicroArchitecture() const { 2272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (has_avx()) return AVX; 2282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (has_sse42()) return SSE42; 2292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (has_sse41()) return SSE41; 2302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (has_ssse3()) return SSSE3; 2312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (has_sse3()) return SSE3; 2322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (has_sse2()) return SSE2; 2332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (has_sse()) return SSE; 2342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return PENTIUM; 2352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 238