upload base code

1 files changed, 68 insertions, 0 deletions

diff --git a/glm/detail/type_float.hpp b/glm/detail/type_float.hpp
new file mode 100644
index 0000000..c8037eb
--- /dev/null
+++ b/glm/detail/type_float.hpp
@@ -0,0 +1,68 @@
+#pragma once
+
+#include "setup.hpp"
+
+#if GLM_COMPILER == GLM_COMPILER_VC12
+#	pragma warning(push)
+#	pragma warning(disable: 4512) // assignment operator could not be generated
+#endif
+
+namespace glm{
+namespace detail
+{
+	template <typename T>
+	union float_t
+	{};
+
+	// https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
+	template <>
+	union float_t<float>
+	{
+		typedef int int_type;
+		typedef float float_type;
+
+		GLM_CONSTEXPR float_t(float_type Num = 0.0f) : f(Num) {}
+
+		GLM_CONSTEXPR float_t& operator=(float_t const& x)
+		{
+			f = x.f;
+			return *this;
+		}
+
+		// Portable extraction of components.
+		GLM_CONSTEXPR bool negative() const { return i < 0; }
+		GLM_CONSTEXPR int_type mantissa() const { return i & ((1 << 23) - 1); }
+		GLM_CONSTEXPR int_type exponent() const { return (i >> 23) & ((1 << 8) - 1); }
+
+		int_type i;
+		float_type f;
+	};
+
+	template <>
+	union float_t<double>
+	{
+		typedef detail::int64 int_type;
+		typedef double float_type;
+
+		GLM_CONSTEXPR float_t(float_type Num = static_cast<float_type>(0)) : f(Num) {}
+
+		GLM_CONSTEXPR float_t& operator=(float_t const& x)
+		{
+			f = x.f;
+			return *this;
+		}
+
+		// Portable extraction of components.
+		GLM_CONSTEXPR bool negative() const { return i < 0; }
+		GLM_CONSTEXPR int_type mantissa() const { return i & ((int_type(1) << 52) - 1); }
+		GLM_CONSTEXPR int_type exponent() const { return (i >> 52) & ((int_type(1) << 11) - 1); }
+
+		int_type i;
+		float_type f;
+	};
+}//namespace detail
+}//namespace glm
+
+#if GLM_COMPILER == GLM_COMPILER_VC12
+#	pragma warning(pop)
+#endif