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author | LaG1924 <12997935+LaG1924@users.noreply.github.com> | 2017-05-12 15:49:50 +0200 |
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committer | LaG1924 <12997935+LaG1924@users.noreply.github.com> | 2017-05-12 15:49:50 +0200 |
commit | e62817b8252974b8a98393275874ee303840bf13 (patch) | |
tree | 4565935f06e369f4a84410b0c098958e07a750c7 /depedencies/include/glm/gtc/integer.inl | |
parent | 2017-05-10 (diff) | |
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Diffstat (limited to 'depedencies/include/glm/gtc/integer.inl')
-rw-r--r-- | depedencies/include/glm/gtc/integer.inl | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/depedencies/include/glm/gtc/integer.inl b/depedencies/include/glm/gtc/integer.inl new file mode 100644 index 0000000..7ce2918 --- /dev/null +++ b/depedencies/include/glm/gtc/integer.inl @@ -0,0 +1,71 @@ +/// @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 |