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 //Qt
  32 #include <QLibrary>
  33
  34 MUtils::CPUFetaures::cpu_info_t MUtils::CPUFetaures::detect(void)
  35 {
  36         const OS::ArgumentMap &args = OS::arguments();
  37         typedef BOOL (WINAPI *IsWow64ProcessFun)(__in HANDLE hProcess, __out PBOOL Wow64Process);
  38
  39         cpu_info_t features;
  40         SYSTEM_INFO systemInfo;
  41         int CPUInfo[4] = {-1};
  42         char CPUIdentificationString[0x40];
  43         char CPUBrandString[0x40];
  44
  45         memset(&features, 0, sizeof(cpu_info_t));
  46         memset(&systemInfo, 0, sizeof(SYSTEM_INFO));
  47         memset(CPUIdentificationString, 0, sizeof(CPUIdentificationString));
  48         memset(CPUBrandString, 0, sizeof(CPUBrandString));
  49
  50         __cpuid(CPUInfo, 0);
  51         memcpy(CPUIdentificationString, &CPUInfo[1], sizeof(int));
  52         memcpy(CPUIdentificationString + 4, &CPUInfo[3], sizeof(int));
  53         memcpy(CPUIdentificationString + 8, &CPUInfo[2], sizeof(int));
  54         features.intel = (_stricmp(CPUIdentificationString, "GenuineIntel") == 0);
  55         strncpy_s(features.vendor, 0x40, CPUIdentificationString, _TRUNCATE);
  56
  57         if(CPUInfo[0] >= 1)
  58         {
  59                 __cpuid(CPUInfo, 1);
  60                 if(CPUInfo[3] & 0x00800000) features.features |= FLAG_MMX;
  61                 if(CPUInfo[3] & 0x02000000) features.features |= FLAG_SSE;
  62                 if(CPUInfo[3] & 0x04000000) features.features |= FLAG_SSE2;
  63                 if(CPUInfo[2] & 0x00000001) features.features |= FLAG_SSE3;
  64                 if(CPUInfo[2] & 0x00000200) features.features |= FLAG_SSSE3;
  65                 if(CPUInfo[2] & 0x00080000) features.features |= FLAG_SSE4;
  66                 if(CPUInfo[2] & 0x00100000) features.features |= FLAG_SSE42;
  67                 features.stepping = CPUInfo[0] & 0xf;
  68                 features.model    = ((CPUInfo[0] >> 4) & 0xf) + (((CPUInfo[0] >> 16) & 0xf) << 4);
  69                 features.family   = ((CPUInfo[0] >> 8) & 0xf) + ((CPUInfo[0] >> 20) & 0xff);
  70         }
  71
  72         __cpuid(CPUInfo, 0x80000000);
  73         int nExIds = qMax<int>(qMin<int>(CPUInfo[0], 0x80000004), 0x80000000);
  74
  75         for(int i = 0x80000002; i <= nExIds; ++i)
  76         {
  77                 __cpuid(CPUInfo, i);
  78                 switch(i)
  79                 {
  80                 case 0x80000002:
  81                         memcpy(CPUBrandString, CPUInfo, sizeof(CPUInfo));
  82                         break;
  83                 case 0x80000003:
  84                         memcpy(CPUBrandString + 16, CPUInfo, sizeof(CPUInfo));
  85                         break;
  86                 case 0x80000004:
  87                         memcpy(CPUBrandString + 32, CPUInfo, sizeof(CPUInfo));
  88                         break;
  89                 }
  90         }
  91
  92         strncpy_s(features.brand, 0x40, CPUBrandString, _TRUNCATE);
  93
  94         if(strlen(features.brand)  < 1) strncpy_s(features.brand,  0x40, "Unknown", _TRUNCATE);
  95         if(strlen(features.vendor) < 1) strncpy_s(features.vendor, 0x40, "Unknown", _TRUNCATE);
  96
  97 #if (!(defined(_M_X64) || defined(_M_IA64)))
  98         const IsWow64ProcessFun isWow64ProcessPtr = MUtils::Win32Utils::resolve<IsWow64ProcessFun>(QLatin1String("kernel32"), QLatin1String("IsWow64Process"));
  99         if(isWow64ProcessPtr)
 100         {
 101                 BOOL x64flag = FALSE;
 102                 if(isWow64ProcessPtr(GetCurrentProcess(), &x64flag))
 103                 {
 104                         features.x64 = (x64flag == TRUE);
 105                 }
 106         }
 107 #else
 108         features.x64 = true;
 109 #endif
 110
 111         DWORD_PTR procAffinity, sysAffinity;
 112         if(GetProcessAffinityMask(GetCurrentProcess(), &procAffinity, &sysAffinity))
 113         {
 114                 for(DWORD_PTR mask = 1; mask; mask <<= 1)
 115                 {
 116                         features.count += ((sysAffinity & mask) ? (1) : (0));
 117                 }
 118         }
 119         if(features.count < 1)
 120         {
 121                 GetNativeSystemInfo(&systemInfo);
 122                 features.count = qBound(1UL, systemInfo.dwNumberOfProcessors, 64UL);
 123         }
 124
 125         bool flag = false;
 126         if(args.contains("force-cpu-no-64bit")) { flag = true; features.x64 = false; }
 127         if(args.contains("force-cpu-no-sse"  )) { flag = true; features.features &= (~(FLAG_SSE | FLAG_SSE2 | FLAG_SSE3 | FLAG_SSSE3 | FLAG_SSE4 | FLAG_SSE42)); }
 128         if(args.contains("force-cpu-no-intel")) { flag = true; features.intel = false; }
 129
 130         if(flag)
 131         {
 132                 qWarning("CPU flags overwritten by user-defined parameters. Take care!\n");
 133         }
 134
 135         return features;
 136 }