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Diffstat (limited to 'engines/sword25/kernel/cpuinfo.cpp')
| -rwxr-xr-x | engines/sword25/kernel/cpuinfo.cpp | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/engines/sword25/kernel/cpuinfo.cpp b/engines/sword25/kernel/cpuinfo.cpp new file mode 100755 index 0000000000..f65f7e6125 --- /dev/null +++ b/engines/sword25/kernel/cpuinfo.cpp @@ -0,0 +1,260 @@ +// ----------------------------------------------------------------------------- +// This file is part of Broken Sword 2.5 +// Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdörfer +// +// 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) + { + // Führende 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 können + unsigned int Result; + __asm + { + xor eax, eax + cpuid + mov Result, eax + } + + // Nicht einmal die Standard-Features können 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 können + { + unsigned int Result; + __asm + { + mov eax, 0x80000000 + cpuid + mov Result, eax + } + + // Die erweiterten Features können nicht abgefragt werden, aber die Standard-Features wurden schon + // abgefragt, daher wird true zurückgegeben. + 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; +} |