integer.inl

 
 
namespace glm{
namespace detail
{
    template<length_t L, typename T, qualifier Q, bool Aligned>
    struct compute_log2<L, T, Q, false, Aligned>
    {
        GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& v)
        {
            //Equivalent to return findMSB(vec); but save one function call in ASM with VC
            //return findMSB(vec);
            return vec<L, T, Q>(detail::compute_findMSB_vec<L, T, Q, sizeof(T) * 8>::call(v));
        }
    };
 
#   if GLM_HAS_BITSCAN_WINDOWS
        template<qualifier Q, bool Aligned>
        struct compute_log2<4, int, Q, false, Aligned>
        {
            GLM_FUNC_QUALIFIER static vec<4, int, Q> call(vec<4, int, Q> const& v)
            {
                vec<4, int, Q> Result;
                _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.x), v.x);
                _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.y), v.y);
                _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.z), v.z);
                _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.w), v.w);
                return Result;
            }
        };
#   endif//GLM_HAS_BITSCAN_WINDOWS
}//namespace detail
    template<typename genType>
    GLM_FUNC_QUALIFIER int iround(genType x)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'iround' only accept floating-point inputs");
        assert(static_cast<genType>(0.0) <= x);
 
        return static_cast<int>(x + static_cast<genType>(0.5));
    }
 
    template<length_t L, typename T, qualifier Q>
    GLM_FUNC_QUALIFIER vec<L, int, Q> iround(vec<L, T, Q> const& x)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'iround' only accept floating-point inputs");
        assert(all(lessThanEqual(vec<L, T, Q>(0), x)));
 
        return vec<L, int, Q>(x + static_cast<T>(0.5));
    }
 
    template<typename genType>
    GLM_FUNC_QUALIFIER uint uround(genType x)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'uround' only accept floating-point inputs");
        assert(static_cast<genType>(0.0) <= x);
 
        return static_cast<uint>(x + static_cast<genType>(0.5));
    }
 
    template<length_t L, typename T, qualifier Q>
    GLM_FUNC_QUALIFIER vec<L, uint, Q> uround(vec<L, T, Q> const& x)
    {
        GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'uround' only accept floating-point inputs");
        assert(all(lessThanEqual(vec<L, T, Q>(0), x)));
 
        return vec<L, uint, Q>(x + static_cast<T>(0.5));
    }
}//namespace glm