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// -----------------------------------------------------------------------------
// This file is part of Broken Sword 2.5
// Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsd�rfer
//
// Broken Sword 2.5 is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// Broken Sword 2.5 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Broken Sword 2.5; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
// -----------------------------------------------------------------------------
#define BS_LOG_PREFIX "CPUINFO"
// -----------------------------------------------------------------------------
// Includes
// -----------------------------------------------------------------------------
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include "cpuinfo.h"
// -----------------------------------------------------------------------------
// Konstanten
// -----------------------------------------------------------------------------
// Standard CPU-Features
static const unsigned int MMX_BITMASK = 1 << 23;
static const unsigned int SSE_BITMASK = 1 << 25;
static const unsigned int SSE2_BITMASK = 1 << 26;
// Erweiterte CPU-Features
static const unsigned int _3DNOW_BITMASK = 1 << 30;
static const unsigned int _3DNOWEXT_BITMASK = 1 << 31;
// -----------------------------------------------------------------------------
// Konstruktion
// -----------------------------------------------------------------------------
BS_CPUInfo::BS_CPUInfo() :
_VendorID(V_UNKNOWN),
_VendorString("unknown"),
_CPUName("unknown"),
_MMXSupported(false),
_SSESupported(false),
_SSE2Supported(false),
_3DNowSupported(false),
_3DNowExtSupported(false)
{
if (!_IsCPUIDSupported())
{
BS_LOG_ERRORLN("CPUID instruction ist not supported. Could not gather processor information.");
return;
}
if (!_ReadVendor())
{
BS_LOG_WARNINGLN("Unrecognized CPU vendor.");
}
if (!_ReadCPUName())
{
BS_LOG_WARNINGLN("Could not determine CPU name.");
}
if (!_ReadCPUFeatures())
{
BS_LOG_WARNINGLN("Could not determine CPU-features.");
}
}
// -----------------------------------------------------------------------------
bool BS_CPUInfo::_IsCPUIDSupported() const
{
__try
{
__asm
{
mov eax, 0
cpuid
}
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
return false;
}
return true;
}
// -----------------------------------------------------------------------------
bool BS_CPUInfo::_ReadVendor()
{
static struct
{
char* VendorString;
BS_CPUInfo::VENDORID ID;
} VENDOR_TABLE[] =
{
"GenuineIntel", V_INTEL,
"AuthenticAMD", V_AMD,
"CyrixInstead", V_CYRIX,
"CentaurHauls", V_CENTAUR,
"NexGenDriven", V_NEXGEN,
"GenuineTMx86", V_TRANSMETA,
"RiseRiseRise", V_RISE,
"UMC UMC UMC", V_UMC,
"SiS SiS SiS", V_SIS,
"Geode by NSC", V_NSC,
0, V_UNKNOWN,
};
// Vendor-String bestimmen
char Buffer[13];
__asm
{
xor eax, eax
cpuid
mov dword ptr [Buffer], ebx
mov dword ptr [Buffer + 4], edx
mov dword ptr [Buffer + 8], ecx
mov byte ptr [Buffer + 12], 0
}
_VendorString = Buffer;
// Vendor-ID bestimmen
int i;
for (i = 0; VENDOR_TABLE[i].VendorString; i++) if (_VendorString == VENDOR_TABLE[i].VendorString) break;
_VendorID = VENDOR_TABLE[i].ID;
return _VendorID != V_UNKNOWN;
}
// -----------------------------------------------------------------------------
bool BS_CPUInfo::_ReadCPUName()
{
// Feststellen, ob das CPU-Name Feature vorhanden ist.
unsigned int Result;
__asm
{
mov eax, 0x80000000
cpuid
mov Result, eax
}
if (Result < 0x80000004) return false;
// CPU-Namen einlesen
char Buffer[49];
__asm
{
mov eax,0x80000002
cpuid
mov dword ptr [Buffer + 0], eax
mov dword ptr [Buffer + 4], ebx
mov dword ptr [Buffer + 8], ecx
mov dword ptr [Buffer + 12], edx
mov eax,0x80000003
cpuid
mov dword ptr [Buffer + 16], eax
mov dword ptr [Buffer + 20], ebx
mov dword ptr [Buffer + 24], ecx
mov dword ptr [Buffer + 28], edx
mov eax,0x80000004
cpuid
mov dword ptr [Buffer + 32], eax
mov dword ptr [Buffer + 36], ebx
mov dword ptr [Buffer + 40], ecx
mov dword ptr [Buffer + 44], edx
mov byte ptr [Buffer + 48], 0
}
std::string TempCPUName = Buffer;
if (TempCPUName.size() != 0)
{
// F�hrende und nachfolgende Leerzeichen entfernen
std::string::const_iterator StringBegin = TempCPUName.begin();
for (; StringBegin != TempCPUName.end() && *StringBegin == ' '; StringBegin++);
std::string::const_iterator StringEnd = TempCPUName.end() - 1;
for(; StringEnd >= TempCPUName.begin() && *StringEnd == ' '; StringEnd--);
if (StringBegin != TempCPUName.end() && StringEnd >= TempCPUName.begin())
{
_CPUName = std::string(StringBegin, StringEnd + 1);
return true;
}
}
return false;
}
// -----------------------------------------------------------------------------
bool BS_CPUInfo::_ReadCPUFeatures()
{
{
// Feststellen ob die Standard-Features abgefragt werden k�nnen
unsigned int Result;
__asm
{
xor eax, eax
cpuid
mov Result, eax
}
// Nicht einmal die Standard-Features k�nnen abgefragt werden, also muss abgebrochen werden
if (Result < 1) return false;
// Standard-Features abfragen
unsigned int Features;
__asm
{
mov eax, 1
cpuid
mov Features, edx
}
_MMXSupported = (Features & MMX_BITMASK) != 0;
_SSESupported = (Features & SSE_BITMASK) != 0;
_SSE2Supported = (Features & SSE2_BITMASK) != 0;
}
// Feststellen ob erweiterte CPU-Features abgefragt werden k�nnen
{
unsigned int Result;
__asm
{
mov eax, 0x80000000
cpuid
mov Result, eax
}
// Die erweiterten Features k�nnen nicht abgefragt werden, aber die Standard-Features wurden schon
// abgefragt, daher wird true zur�ckgegeben.
if (Result < 0x80000001) return true;
// Erweiterte Features abfragen
unsigned int Features;
__asm
{
mov eax, 0x80000001
cpuid
mov Features, edx
}
_3DNowSupported = (Features & _3DNOW_BITMASK) != 0;
_3DNowExtSupported = (Features & _3DNOWEXT_BITMASK) != 0;
}
return true;
}
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