src/CPUFeatures_Win32.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // MuldeR's Utilities for Qt
   3 // Copyright (C) 2004-2015 LoRd_MuldeR <MuldeR2@GMX.de>
   4 //
   5 // This library is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU Lesser General Public
   7 // License as published by the Free Software Foundation; either
   8 // version 2.1 of the License, or (at your option) any later version.
   9 //
  10 // This library is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 // Lesser General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU Lesser General Public
  16 // License along with this library; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18 //
  19 // http://www.gnu.org/licenses/lgpl-2.1.txt
  20 //////////////////////////////////////////////////////////////////////////////////
  21
  22 //Win32 API
  23 #define WIN32_LEAN_AND_MEAN 1
  24 #include <Windows.h>
  25
  26 //MUtils
  27 #include <MUtils/CPUFeatures.h>
  28 #include <MUtils/OSSupport.h>
  29 #include "Utils_Win32.h"
  30
  31 MUtils::CPUFetaures::cpu_info_t MUtils::CPUFetaures::detect(void)
  32 {
  33         const OS::ArgumentMap &args = OS::arguments();
  34         typedef BOOL (WINAPI *IsWow64ProcessFun)(__in HANDLE hProcess, __out PBOOL Wow64Process);
  35
  36         cpu_info_t features;
  37         SYSTEM_INFO systemInfo;
  38         int CPUInfo[4] = {-1};
  39         char CPUIdentificationString[0x40];
  40         char CPUBrandString[0x40];
  41
  42         memset(&features, 0, sizeof(cpu_info_t));
  43         memset(&systemInfo, 0, sizeof(SYSTEM_INFO));
  44         memset(CPUIdentificationString, 0, sizeof(CPUIdentificationString));
  45         memset(CPUBrandString, 0, sizeof(CPUBrandString));
  46
  47         __cpuid(CPUInfo, 0);
  48         memcpy(CPUIdentificationString, &CPUInfo[1], sizeof(int));
  49         memcpy(CPUIdentificationString + 4, &CPUInfo[3], sizeof(int));
  50         memcpy(CPUIdentificationString + 8, &CPUInfo[2], sizeof(int));
  51         features.intel = (_stricmp(CPUIdentificationString, "GenuineIntel") == 0);
  52         strncpy_s(features.vendor, 0x40, CPUIdentificationString, _TRUNCATE);
  53
  54         if(CPUInfo[0] >= 1)
  55         {
  56                 __cpuid(CPUInfo, 1);
  57                 if(CPUInfo[3] & 0x00800000) features.features |= FLAG_MMX;
  58                 if(CPUInfo[3] & 0x02000000) features.features |= FLAG_SSE;
  59                 if(CPUInfo[3] & 0x04000000) features.features |= FLAG_SSE2;
  60                 if(CPUInfo[2] & 0x00000001) features.features |= FLAG_SSE3;
  61                 if(CPUInfo[2] & 0x00000200) features.features |= FLAG_SSSE3;
  62                 if(CPUInfo[2] & 0x00080000) features.features |= FLAG_SSE4;
  63                 if(CPUInfo[2] & 0x00100000) features.features |= FLAG_SSE42;
  64                 if ((CPUInfo[2] & 0x18000000) == 0x18000000)
  65                 {
  66                         if (IsProcessorFeaturePresent(PF_XSAVE_ENABLED)) /*AVX requires OS support!*/
  67                         {
  68                                 features.features |= FLAG_AVX;
  69                         }
  70                 }
  71                 features.stepping = CPUInfo[0] & 0xf;
  72                 features.model    = ((CPUInfo[0] >> 4) & 0xf) + (((CPUInfo[0] >> 16) & 0xf) << 4);
  73                 features.family   = ((CPUInfo[0] >> 8) & 0xf) + ((CPUInfo[0] >> 20) & 0xff);
  74         }
  75
  76         __cpuid(CPUInfo, 0x80000000);
  77         int nExIds = qMax<int>(qMin<int>(CPUInfo[0], 0x80000004), 0x80000000);
  78
  79         for(int i = 0x80000002; i <= nExIds; ++i)
  80         {
  81                 __cpuid(CPUInfo, i);
  82                 switch(i)
  83                 {
  84                 case 0x80000002:
  85                         memcpy(CPUBrandString, CPUInfo, sizeof(CPUInfo));
  86                         break;
  87                 case 0x80000003:
  88                         memcpy(CPUBrandString + 16, CPUInfo, sizeof(CPUInfo));
  89                         break;
  90                 case 0x80000004:
  91                         memcpy(CPUBrandString + 32, CPUInfo, sizeof(CPUInfo));
  92                         break;
  93                 }
  94         }
  95
  96         strncpy_s(features.brand, 0x40, CPUBrandString, _TRUNCATE);
  97
  98         if(strlen(features.brand)  < 1) strncpy_s(features.brand,  0x40, "Unknown", _TRUNCATE);
  99         if(strlen(features.vendor) < 1) strncpy_s(features.vendor, 0x40, "Unknown", _TRUNCATE);
 100
 101 #if (!(defined(_M_X64) || defined(_M_IA64)))
 102         const IsWow64ProcessFun isWow64ProcessPtr = MUtils::Win32Utils::resolve<IsWow64ProcessFun>(QLatin1String("kernel32"), QLatin1String("IsWow64Process"));
 103         if(isWow64ProcessPtr)
 104         {
 105                 BOOL x64flag = FALSE;
 106                 if(isWow64ProcessPtr(GetCurrentProcess(), &x64flag))
 107                 {
 108                         if(x64flag) features.x64 = true;
 109                 }
 110         }
 111 #else
 112         features.x64 = true;
 113 #endif
 114
 115         if (features.x64)
 116         {
 117                 features.features |= (FLAG_MMX | FLAG_SSE | FLAG_SSE2); /*x86_64 implies SSE2*/
 118         }
 119
 120         if (!(features.features & FLAG_MMX))
 121         {
 122                 qWarning("Warning: CPU does not seem to support MMX. Take care!\n");
 123                 features.features = 0;
 124         }
 125
 126         DWORD_PTR procAffinity, sysAffinity;
 127         if(GetProcessAffinityMask(GetCurrentProcess(), &procAffinity, &sysAffinity))
 128         {
 129                 for(DWORD_PTR mask = 1; mask; mask <<= 1)
 130                 {
 131                         features.count += ((sysAffinity & mask) ? (1) : (0));
 132                 }
 133         }
 134         if(features.count < 1)
 135         {
 136                 GetNativeSystemInfo(&systemInfo);
 137                 features.count = qBound(1UL, systemInfo.dwNumberOfProcessors, 64UL);
 138         }
 139
 140         bool userFlag = false;
 141         if(args.contains("force-cpu-no-64bit")) { userFlag = true; features.x64 = false; }
 142         if(args.contains("force-cpu-no-sse"  )) { userFlag = true; features.features &= (~(FLAG_SSE | FLAG_SSE2 | FLAG_SSE3 | FLAG_SSSE3 | FLAG_SSE4 | FLAG_SSE42)); }
 143         if(args.contains("force-cpu-no-intel")) { userFlag = true; features.intel = false; }
 144
 145         if(userFlag)
 146         {
 147                 qWarning("CPU flags overwritten by user-defined parameters. Take care!\n");
 148         }
 149
 150         return features;
 151 }