initial commit

lib/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