/// @ref gtc_integer /// @file glm/gtc/integer.inl namespace glm{ namespace detail { template <typename T, precision P, template <typename, precision> class vecType, bool Aligned> struct compute_log2<T, P, vecType, false, Aligned> { GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & vec) { //Equivalent to return findMSB(vec); but save one function call in ASM with VC //return findMSB(vec); return vecType<T, P>(detail::compute_findMSB_vec<T, P, vecType, sizeof(T) * 8>::call(vec)); } }; # if GLM_HAS_BITSCAN_WINDOWS template <precision P, bool Aligned> struct compute_log2<int, P, tvec4, false, Aligned> { GLM_FUNC_QUALIFIER static tvec4<int, P> call(tvec4<int, P> const & vec) { tvec4<int, P> Result(glm::uninitialize); _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.x), vec.x); _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.y), vec.y); _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.z), vec.z); _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.w), vec.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 <typename T, precision P, template <typename, precision> class vecType> GLM_FUNC_QUALIFIER vecType<int, P> iround(vecType<T, P> const& x) { GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'iround' only accept floating-point inputs"); assert(all(lessThanEqual(vecType<T, P>(0), x))); return vecType<int, P>(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 <typename T, precision P, template <typename, precision> class vecType> GLM_FUNC_QUALIFIER vecType<uint, P> uround(vecType<T, P> const& x) { GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'uround' only accept floating-point inputs"); assert(all(lessThanEqual(vecType<T, P>(0), x))); return vecType<uint, P>(x + static_cast<T>(0.5)); } }//namespace glm