src/CPUFeatures_Win32.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // MuldeR's Utilities for Qt
   3 // Copyright (C) 2004-2014 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
  30 //Qt
  31 #include <QLibrary>
  32
  33 MUtils::CPUFetaures::cpu_info_t MUtils::CPUFetaures::detect(void)
  34 {
  35         const OS::ArgumentMap &args = OS::arguments();
  36         typedef BOOL (WINAPI *IsWow64ProcessFun)(__in HANDLE hProcess, __out PBOOL Wow64Process);
  37
  38         cpu_info_t features;
  39         SYSTEM_INFO systemInfo;
  40         int CPUInfo[4] = {-1};
  41         char CPUIdentificationString[0x40];
  42         char CPUBrandString[0x40];
  43
  44         memset(&features, 0, sizeof(cpu_info_t));
  45         memset(&systemInfo, 0, sizeof(SYSTEM_INFO));
  46         memset(CPUIdentificationString, 0, sizeof(CPUIdentificationString));
  47         memset(CPUBrandString, 0, sizeof(CPUBrandString));
  48
  49         __cpuid(CPUInfo, 0);
  50         memcpy(CPUIdentificationString, &CPUInfo[1], sizeof(int));
  51         memcpy(CPUIdentificationString + 4, &CPUInfo[3], sizeof(int));
  52         memcpy(CPUIdentificationString + 8, &CPUInfo[2], sizeof(int));
  53         features.intel = (_stricmp(CPUIdentificationString, "GenuineIntel") == 0);
  54         strncpy_s(features.vendor, 0x40, CPUIdentificationString, _TRUNCATE);
  55
  56         if(CPUInfo[0] >= 1)
  57         {
  58                 __cpuid(CPUInfo, 1);
  59                 if(CPUInfo[3] & 0x00800000) features.features |= FLAG_MMX;
  60                 if(CPUInfo[3] & 0x02000000) features.features |= FLAG_SSE;
  61                 if(CPUInfo[3] & 0x04000000) features.features |= FLAG_SSE2;
  62                 if(CPUInfo[2] & 0x00000001) features.features |= FLAG_SSE3;
  63                 if(CPUInfo[2] & 0x00000200) features.features |= FLAG_SSSE3;
  64                 if(CPUInfo[2] & 0x00080000) features.features |= FLAG_SSE4;
  65                 if(CPUInfo[2] & 0x00100000) features.features |= FLAG_SSE42;
  66                 features.stepping = CPUInfo[0] & 0xf;
  67                 features.model    = ((CPUInfo[0] >> 4) & 0xf) + (((CPUInfo[0] >> 16) & 0xf) << 4);
  68                 features.family   = ((CPUInfo[0] >> 8) & 0xf) + ((CPUInfo[0] >> 20) & 0xff);
  69         }
  70
  71         __cpuid(CPUInfo, 0x80000000);
  72         int nExIds = qMax<int>(qMin<int>(CPUInfo[0], 0x80000004), 0x80000000);
  73
  74         for(int i = 0x80000002; i <= nExIds; ++i)
  75         {
  76                 __cpuid(CPUInfo, i);
  77                 switch(i)
  78                 {
  79                 case 0x80000002:
  80                         memcpy(CPUBrandString, CPUInfo, sizeof(CPUInfo));
  81                         break;
  82                 case 0x80000003:
  83                         memcpy(CPUBrandString + 16, CPUInfo, sizeof(CPUInfo));
  84                         break;
  85                 case 0x80000004:
  86                         memcpy(CPUBrandString + 32, CPUInfo, sizeof(CPUInfo));
  87                         break;
  88                 }
  89         }
  90
  91         strncpy_s(features.brand, 0x40, CPUBrandString, _TRUNCATE);
  92
  93         if(strlen(features.brand)  < 1) strncpy_s(features.brand,  0x40, "Unknown", _TRUNCATE);
  94         if(strlen(features.vendor) < 1) strncpy_s(features.vendor, 0x40, "Unknown", _TRUNCATE);
  95
  96 #if (!(defined(_M_X64) || defined(_M_IA64)))
  97         QLibrary Kernel32Lib("kernel32.dll");
  98         if(IsWow64ProcessFun IsWow64ProcessPtr = (IsWow64ProcessFun) Kernel32Lib.resolve("IsWow64Process"))
  99         {
 100                 BOOL x64flag = FALSE;
 101                 if(IsWow64ProcessPtr(GetCurrentProcess(), &x64flag))
 102                 {
 103                         features.x64 = (x64flag == TRUE);
 104                 }
 105         }
 106 #else
 107         features.x64 = true;
 108 #endif
 109
 110         DWORD_PTR procAffinity, sysAffinity;
 111         if(GetProcessAffinityMask(GetCurrentProcess(), &procAffinity, &sysAffinity))
 112         {
 113                 for(DWORD_PTR mask = 1; mask; mask <<= 1)
 114                 {
 115                         features.count += ((sysAffinity & mask) ? (1) : (0));
 116                 }
 117         }
 118         if(features.count < 1)
 119         {
 120                 GetNativeSystemInfo(&systemInfo);
 121                 features.count = qBound(1UL, systemInfo.dwNumberOfProcessors, 64UL);
 122         }
 123
 124         bool flag = false;
 125         if(args.contains("force-cpu-no-64bit")) { flag = true; features.x64 = false; }
 126         if(args.contains("force-cpu-no-sse"  )) { flag = true; features.features &= (~(FLAG_SSE | FLAG_SSE2 | FLAG_SSE3 | FLAG_SSSE3 | FLAG_SSE4 | FLAG_SSE42)); }
 127         if(args.contains("force-cpu-no-intel")) { flag = true; features.intel = false; }
 128
 129         if(flag)
 130         {
 131                 qWarning("CPU flags overwritten by user-defined parameters. Take care!\n");
 132         }
 133
 134         return features;
 135 }