From a8b3118e8305fd1c668ea25e07157b625c9747ff Mon Sep 17 00:00:00 2001
From: Joursoir <chat@joursoir.net>
Date: Sat, 10 Apr 2021 17:29:02 +0000
Subject: add glm headers

---
 src/include/glm/detail/func_exponential.inl | 152 ++++++++++++++++++++++++++++
 1 file changed, 152 insertions(+)
 create mode 100644 src/include/glm/detail/func_exponential.inl

(limited to 'src/include/glm/detail/func_exponential.inl')

diff --git a/src/include/glm/detail/func_exponential.inl b/src/include/glm/detail/func_exponential.inl
new file mode 100644
index 0000000..477b377
--- /dev/null
+++ b/src/include/glm/detail/func_exponential.inl
@@ -0,0 +1,152 @@
+/// @ref core
+/// @file glm/detail/func_exponential.inl
+
+#include "../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<length_t L, typename T, qualifier Q, bool isFloat, bool Aligned>
+	struct compute_log2
+	{
+		GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& v)
+		{
+			GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'log2' only accept floating-point inputs. Include <glm/gtc/integer.hpp> for integer inputs.");
+
+			return detail::functor1<vec, L, T, T, Q>::call(log2, v);
+		}
+	};
+
+	template<length_t L, typename T, qualifier Q, bool Aligned>
+	struct compute_sqrt
+	{
+		GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& x)
+		{
+			return detail::functor1<vec, L, T, T, Q>::call(std::sqrt, x);
+		}
+	};
+
+	template<length_t L, typename T, qualifier Q, bool Aligned>
+	struct compute_inversesqrt
+	{
+		GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& x)
+		{
+			return static_cast<T>(1) / sqrt(x);
+		}
+	};
+
+	template<length_t L, bool Aligned>
+	struct compute_inversesqrt<L, float, lowp, Aligned>
+	{
+		GLM_FUNC_QUALIFIER static vec<L, float, lowp> call(vec<L, float, lowp> const& x)
+		{
+			vec<L, float, lowp> tmp(x);
+			vec<L, float, lowp> xhalf(tmp * 0.5f);
+			vec<L, uint, lowp>* p = reinterpret_cast<vec<L, uint, lowp>*>(const_cast<vec<L, float, lowp>*>(&x));
+			vec<L, uint, lowp> i = vec<L, uint, lowp>(0x5f375a86) - (*p >> vec<L, uint, lowp>(1));
+			vec<L, float, lowp>* ptmp = reinterpret_cast<vec<L, float, lowp>*>(&i);
+			tmp = *ptmp;
+			tmp = tmp * (1.5f - xhalf * tmp * tmp);
+			return tmp;
+		}
+	};
+}//namespace detail
+
+	// pow
+	using std::pow;
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> pow(vec<L, T, Q> const& base, vec<L, T, Q> const& exponent)
+	{
+		return detail::functor2<vec, L, T, Q>::call(pow, base, exponent);
+	}
+
+	// exp
+	using std::exp;
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> exp(vec<L, T, Q> const& x)
+	{
+		return detail::functor1<vec, L, T, T, Q>::call(exp, x);
+	}
+
+	// log
+	using std::log;
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> log(vec<L, T, Q> const& x)
+	{
+		return detail::functor1<vec, L, T, T, Q>::call(log, x);
+	}
+
+#   if GLM_HAS_CXX11_STL
+    using std::exp2;
+#   else
+	//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);
+	}
+#   endif
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> exp2(vec<L, T, Q> const& x)
+	{
+		return detail::functor1<vec, L, T, T, Q>::call(exp2, x);
+	}
+
+	// log2, ln2 = 0.69314718055994530941723212145818f
+	template<typename genType>
+	GLM_FUNC_QUALIFIER genType log2(genType x)
+	{
+		return log2(vec<1, genType>(x)).x;
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> log2(vec<L, T, Q> const& x)
+	{
+		return detail::compute_log2<L, T, Q, std::numeric_limits<T>::is_iec559, detail::is_aligned<Q>::value>::call(x);
+	}
+
+	// sqrt
+	using std::sqrt;
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> sqrt(vec<L, T, Q> const& x)
+	{
+		GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'sqrt' only accept floating-point inputs");
+		return detail::compute_sqrt<L, T, Q, detail::is_aligned<Q>::value>::call(x);
+	}
+
+	// inversesqrt
+	template<typename genType>
+	GLM_FUNC_QUALIFIER genType inversesqrt(genType x)
+	{
+		return static_cast<genType>(1) / sqrt(x);
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> inversesqrt(vec<L, T, Q> const& x)
+	{
+		GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'inversesqrt' only accept floating-point inputs");
+		return detail::compute_inversesqrt<L, T, Q, detail::is_aligned<Q>::value>::call(x);
+	}
+}//namespace glm
+
+#if GLM_CONFIG_SIMD == GLM_ENABLE
+#	include "func_exponential_simd.inl"
+#endif
+
-- 
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