CrystalSpace

Public API Reference

csutil/processor/processorspecdetection_win.h
00001 /*
00002 Copyright (C) 2007 by Michael Gist
00003 
00004 This library is free software; you can redistribute it and/or
00005 modify it under the terms of the GNU Library General Public
00006 License as published by the Free Software Foundation; either
00007 version 2 of the License, or (at your option) any later version.
00008 
00009 This library is distributed in the hope that it will be useful,
00010 but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012 Library General Public License for more details.
00013 
00014 You should have received a copy of the GNU Library General Public
00015 License along with this library; if not, write to the Free
00016 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 */
00018 
00019 #ifndef __PROCESSORSPECDETECTION_WIN_H__
00020 #define __PROCESSORSPECDETECTION_WIN_H__
00021 
00022 // Not defined in some SDKs.
00023 #ifndef PF_SSE3_INSTRUCTIONS_AVAILABLE
00024 #define PF_SSE3_INSTRUCTIONS_AVAILABLE 13
00025 #endif
00026 
00027 namespace Implementation
00028 {
00029     class DetectInstructionsWin
00030     {
00031     public:
00032 
00033         uint CheckSupportedInstruction()
00034         {
00035             uint instructionBitMask = 0U;
00036             // We know 64-bit processors on windows will support MMX, SSE and SSE2 instructions.
00037             bool plat64bit = false;
00038 #if defined(CS_PLATFORM_WIN32) && (CS_PROCESSOR_SIZE == 64)
00039             plat64bit = true;
00040 #endif
00041 
00042             // Check for instruction sets and set flags.
00043             if(plat64bit || IsProcessorFeaturePresent(PF_MMX_INSTRUCTIONS_AVAILABLE) != 0)
00044                 instructionBitMask |= MMX;
00045             if(plat64bit || IsProcessorFeaturePresent(PF_XMMI_INSTRUCTIONS_AVAILABLE) != 0)
00046                 instructionBitMask |= SSE;
00047             if(plat64bit || IsProcessorFeaturePresent(PF_XMMI64_INSTRUCTIONS_AVAILABLE) != 0)
00048                 instructionBitMask |= SSE2;
00049             if(IsProcessorFeaturePresent(PF_SSE3_INSTRUCTIONS_AVAILABLE) != 0)
00050                 instructionBitMask |= SSE3;
00051 
00052             return instructionBitMask;
00053         }
00054     };
00055 }
00056 
00057 #endif // __PROCESSORSPECDETECTION_WIN_H__

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