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71 lines
2.5 KiB
71 lines
2.5 KiB
/// @ref gtc_integer |
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/// @file glm/gtc/integer.inl |
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namespace glm{ |
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namespace detail |
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{ |
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template <int D, typename T, precision P, template <int, typename, precision> class vecType, bool Aligned> |
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struct compute_log2<D, T, P, vecType, false, Aligned> |
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{ |
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GLM_FUNC_QUALIFIER static vecType<D, T, P> call(vecType<D, T, P> const & vec) |
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{ |
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//Equivalent to return findMSB(vec); but save one function call in ASM with VC |
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//return findMSB(vec); |
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return vecType<D, T, P>(detail::compute_findMSB_vec<D, T, P, vecType, sizeof(T) * 8>::call(vec)); |
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} |
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}; |
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# if GLM_HAS_BITSCAN_WINDOWS |
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template <precision P, bool Aligned> |
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struct compute_log2<4, int, P, tvec, false, Aligned> |
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{ |
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GLM_FUNC_QUALIFIER static tvec4<int, P> call(tvec4<int, P> const & vec) |
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{ |
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tvec4<int, P> Result(glm::uninitialize); |
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_BitScanReverse(reinterpret_cast<unsigned long*>(&Result.x), vec.x); |
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_BitScanReverse(reinterpret_cast<unsigned long*>(&Result.y), vec.y); |
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_BitScanReverse(reinterpret_cast<unsigned long*>(&Result.z), vec.z); |
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_BitScanReverse(reinterpret_cast<unsigned long*>(&Result.w), vec.w); |
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return Result; |
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} |
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}; |
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# endif//GLM_HAS_BITSCAN_WINDOWS |
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}//namespace detail |
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template <typename genType> |
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GLM_FUNC_QUALIFIER int iround(genType x) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'iround' only accept floating-point inputs"); |
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assert(static_cast<genType>(0.0) <= x); |
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return static_cast<int>(x + static_cast<genType>(0.5)); |
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} |
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template <int D, typename T, precision P, template <int, typename, precision> class vecType> |
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GLM_FUNC_QUALIFIER vecType<D, int, P> iround(vecType<D, T, P> const& x) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'iround' only accept floating-point inputs"); |
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assert(all(lessThanEqual(vecType<D, T, P>(0), x))); |
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return vecType<D, int, P>(x + static_cast<T>(0.5)); |
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} |
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template <typename genType> |
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GLM_FUNC_QUALIFIER uint uround(genType x) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'uround' only accept floating-point inputs"); |
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assert(static_cast<genType>(0.0) <= x); |
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return static_cast<uint>(x + static_cast<genType>(0.5)); |
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} |
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template <int D, typename T, precision P, template <int, typename, precision> class vecType> |
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GLM_FUNC_QUALIFIER vecType<D, uint, P> uround(vecType<D, T, P> const& x) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'uround' only accept floating-point inputs"); |
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assert(all(lessThanEqual(vecType<D, T, P>(0), x))); |
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return vecType<D, uint, P>(x + static_cast<T>(0.5)); |
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} |
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}//namespace glm
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