csutil/processor/processorspecdetection_win.h Source File (Crystal Space 2.0 Public API Reference)

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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__