initial commit

2025-02-17 21:05:45 +01:00
commit 06623aeb64
282 changed files with 113292 additions and 0 deletions
--- a/lib/glm/detail/func_exponential.inl
+++ b/lib/glm/detail/func_exponential.inl
@@ -0,0 +1,146 @@
+/// @ref core
+/// @file glm/detail/func_exponential.inl
+
+#include "func_vector_relational.hpp"
+#include "_vectorize.hpp"
+#include <limits>
+#include <cmath>
+#include <cassert>
+
+namespace glm{
+namespace detail
+{
+#	if GLM_HAS_CXX11_STL
+		using std::log2;
+#	else
+		template <typename genType>
+		genType log2(genType Value)
+		{
+			return std::log(Value) * static_cast<genType>(1.4426950408889634073599246810019);
+		}
+#	endif
+
+	template <typename T, precision P, template <class, precision> class vecType, bool isFloat, bool Aligned>
+	struct compute_log2
+	{
+		GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & vec)
+		{
+			return detail::functor1<T, T, P, vecType>::call(log2, vec);
+		}
+	};
+
+	template <template <class, precision> class vecType, typename T, precision P, bool Aligned>
+	struct compute_sqrt
+	{
+		GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & x)
+		{
+			return detail::functor1<T, T, P, vecType>::call(std::sqrt, x);
+		}
+	};
+
+	template <template <class, precision> class vecType, typename T, precision P, bool Aligned>
+	struct compute_inversesqrt
+	{
+		GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & x)
+		{
+			return static_cast<T>(1) / sqrt(x);
+		}
+	};
+		
+	template <template <class, precision> class vecType, bool Aligned>
+	struct compute_inversesqrt<vecType, float, lowp, Aligned>
+	{
+		GLM_FUNC_QUALIFIER static vecType<float, lowp> call(vecType<float, lowp> const & x)
+		{
+			vecType<float, lowp> tmp(x);
+			vecType<float, lowp> xhalf(tmp * 0.5f);
+			vecType<uint, lowp>* p = reinterpret_cast<vecType<uint, lowp>*>(const_cast<vecType<float, lowp>*>(&x));
+			vecType<uint, lowp> i = vecType<uint, lowp>(0x5f375a86) - (*p >> vecType<uint, lowp>(1));
+			vecType<float, lowp>* ptmp = reinterpret_cast<vecType<float, lowp>*>(&i);
+			tmp = *ptmp;
+			tmp = tmp * (1.5f - xhalf * tmp * tmp);
+			return tmp;
+		}
+	};
+}//namespace detail
+
+	// pow
+	using std::pow;
+	template <typename T, precision P, template <typename, precision> class vecType>
+	GLM_FUNC_QUALIFIER vecType<T, P> pow(vecType<T, P> const & base, vecType<T, P> const & exponent)
+	{
+		return detail::functor2<T, P, vecType>::call(pow, base, exponent);
+	}
+
+	// exp
+	using std::exp;
+	template <typename T, precision P, template <typename, precision> class vecType>
+	GLM_FUNC_QUALIFIER vecType<T, P> exp(vecType<T, P> const & x)
+	{
+		return detail::functor1<T, T, P, vecType>::call(exp, x);
+	}
+
+	// log
+	using std::log;
+	template <typename T, precision P, template <typename, precision> class vecType>
+	GLM_FUNC_QUALIFIER vecType<T, P> log(vecType<T, P> const & x)
+	{
+		return detail::functor1<T, T, P, vecType>::call(log, x);
+	}
+
+	//exp2, ln2 = 0.69314718055994530941723212145818f
+	template <typename genType>
+	GLM_FUNC_QUALIFIER genType exp2(genType x)
+	{
+		GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'exp2' only accept floating-point inputs");
+
+		return std::exp(static_cast<genType>(0.69314718055994530941723212145818) * x);
+	}
+
+	template <typename T, precision P, template <typename, precision> class vecType>
+	GLM_FUNC_QUALIFIER vecType<T, P> exp2(vecType<T, P> const & x)
+	{
+		return detail::functor1<T, T, P, vecType>::call(exp2, x);
+	}
+
+	// log2, ln2 = 0.69314718055994530941723212145818f
+	template <typename genType>
+	GLM_FUNC_QUALIFIER genType log2(genType x)
+	{
+		return log2(tvec1<genType>(x)).x;
+	}
+
+	template <typename T, precision P, template <typename, precision> class vecType>
+	GLM_FUNC_QUALIFIER vecType<T, P> log2(vecType<T, P> const & x)
+	{
+		return detail::compute_log2<T, P, vecType, std::numeric_limits<T>::is_iec559, detail::is_aligned<P>::value>::call(x);
+	}
+
+	// sqrt
+	using std::sqrt;
+	template <typename T, precision P, template <typename, precision> class vecType>
+	GLM_FUNC_QUALIFIER vecType<T, P> sqrt(vecType<T, P> const & x)
+	{
+		GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'sqrt' only accept floating-point inputs");
+		return detail::compute_sqrt<vecType, T, P, detail::is_aligned<P>::value>::call(x);
+	}
+
+	// inversesqrt
+	template <typename genType>
+	GLM_FUNC_QUALIFIER genType inversesqrt(genType x)
+	{
+		return static_cast<genType>(1) / sqrt(x);
+	}
+	
+	template <typename T, precision P, template <typename, precision> class vecType>
+	GLM_FUNC_QUALIFIER vecType<T, P> inversesqrt(vecType<T, P> const & x)
+	{
+		GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'inversesqrt' only accept floating-point inputs");
+		return detail::compute_inversesqrt<vecType, T, P, detail::is_aligned<P>::value>::call(x);
+	}
+}//namespace glm
+
+#if GLM_ARCH != GLM_ARCH_PURE && GLM_HAS_UNRESTRICTED_UNIONS
+#	include "func_exponential_simd.inl"
+#endif
+