cpufeatures.h

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
 * do so, all subject to the following:
 *
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
 * works are solely in the form of machine-executable object code generated by
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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#pragma once
 
#include <cstdint>
#include <utility>
#include "sysconfig.h"
 
class QString;
 
namespace LC
{
namespace Util
{
    class UTIL_SYS_API CpuFeatures
    {
        uint32_t Ecx1_ = 0;
        uint32_t Ebx7_ = 0;
    public:
        CpuFeatures ();
 
        enum class Feature
        {
            SSSE3,
            SSE41,
            AVX,
            XSave,
            AVX2,
 
            None
        };
 
        bool HasFeature (Feature) const;
 
        static QString GetFeatureName (Feature);
 
        template<typename T>
        static T Choose (std::initializer_list<std::pair<Feature, T>> funcs, T fallback)
        {
            const CpuFeatures features;
            for (const auto& pair : funcs)
                if (features.HasFeature (pair.first))
                    return pair.second;
 
            return fallback;
        }
    private:
        void DumpDetectedFeatures () const;
    };
}
}