///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
/// Copyright (c) 2005 - 2012 G-Truc Creation (www.g-truc.net)
/// Permission is hereby granted, free of charge, to any person obtaining a copy
/// of this software and associated documentation files (the "Software"), to deal
/// in the Software without restriction, including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
/// copies of the Software, and to permit persons to whom the Software is
/// furnished to do so, subject to the following conditions:
/// 
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
/// 
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
/// THE SOFTWARE.
///
/// @ref core
/// @file glm/core/func_common.inl
/// @date 2008-08-03 / 2011-06-15
/// @author Christophe Riccio
///////////////////////////////////////////////////////////////////////////////////

#include "_vectorize.hpp"

namespace glm{
namespace detail
{
    template <typename genFIType, bool /*signed*/>
    struct Abs_
    {};

    template <typename genFIType>
    struct Abs_<genFIType, true>
    {
        static genFIType get(genFIType const & x)
        {
            GLM_STATIC_ASSERT(
                detail::type<genFIType>::is_float || 
                detail::type<genFIType>::is_int, "'abs' only accept floating-point and integer inputs");
            return x >= genFIType(0) ? x : -x;
			// TODO, perf comp with: *(((int *) &x) + 1) &= 0x7fffffff;
        }
    };

    template <typename genFIType>
    struct Abs_<genFIType, false>
    {
        static genFIType get(genFIType const & x)
        {
            GLM_STATIC_ASSERT(
					detail::type<genFIType>::is_uint, "'abs' only accept floating-point and integer inputs");
            return x;
        }
    };
}//namespace detail

	// abs
	template <typename genFIType>
    GLM_FUNC_QUALIFIER genFIType abs
	(
		genFIType const & x
	)
    {
		return detail::Abs_<genFIType, std::numeric_limits<genFIType>::is_signed>::get(x);
    }

	VECTORIZE_VEC(abs)

    // sign
	//Try something like based on x >> 31 to get the sign bit
    template <typename genFIType> 
	GLM_FUNC_QUALIFIER genFIType sign
	(
		genFIType const & x
	)
	{
		GLM_STATIC_ASSERT(
			detail::type<genFIType>::is_float || 
			detail::type<genFIType>::is_int, "'sign' only accept signed inputs");
        
		genFIType result;
		if(x > genFIType(0))
            result = genFIType(1);
        else if(x < genFIType(0))
            result = genFIType(-1);
        else
            result = genFIType(0);
        return result;
	}
	
	VECTORIZE_VEC(sign)

    // floor
    template <>
	GLM_FUNC_QUALIFIER detail::half floor<detail::half>(detail::half const & x)
    {
        return detail::half(::std::floor(float(x)));
    }

    template <typename genType>
    GLM_FUNC_QUALIFIER genType floor(genType const & x)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'floor' only accept floating-point inputs");

        return ::std::floor(x);
    }

	VECTORIZE_VEC(floor)

    // trunc
    template <typename genType>
    GLM_FUNC_QUALIFIER genType trunc(genType const & x)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'trunc' only accept floating-point inputs");
        return x < 0 ? -floor(-x) : floor(x);
    }

	VECTORIZE_VEC(trunc)

    // round
    template <typename genType>
    GLM_FUNC_QUALIFIER genType round(genType const& x)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'round' only accept floating-point inputs");

		if(x < 0)
			return genType(int(x - genType(0.5)));
		return genType(int(x + genType(0.5)));
    }

	VECTORIZE_VEC(round)

/*
    // roundEven
    template <typename genType>
    GLM_FUNC_QUALIFIER genType roundEven(genType const& x)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'roundEven' only accept floating-point inputs");

		return genType(int(x + genType(int(x) % 2)));
    }
*/
	
    // roundEven
    template <typename genType>
    GLM_FUNC_QUALIFIER genType roundEven(genType const & x)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'roundEven' only accept floating-point inputs");
		
		int Integer = int(x);
		genType IntegerPart = genType(Integer);
		genType FractionalPart = fract(x);

		if(FractionalPart > genType(0.5) || FractionalPart < genType(0.5))
		{
			return round(x);
		}
		else if((Integer % 2) == 0)
		{
			return IntegerPart;
		}
		else if(x <= genType(0)) // Work around... 
		{
			return IntegerPart - 1;
		}
		else
		{
			return IntegerPart + 1;
		}
		//else // Bug on MinGW 4.5.2
		//{
		//	return mix(IntegerPart + genType(-1), IntegerPart + genType(1), x <= genType(0));
		//}
	}
	
	VECTORIZE_VEC(roundEven)

    // ceil
    template <typename genType>
    GLM_FUNC_QUALIFIER genType ceil(genType const & x)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'ceil' only accept floating-point inputs");

        return ::std::ceil(x);
    }

	VECTORIZE_VEC(ceil)

    // fract
    template <typename genType>
    GLM_FUNC_QUALIFIER genType fract
	(
		genType const & x
	)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'fract' only accept floating-point inputs");

        return x - ::std::floor(x);
    }

	VECTORIZE_VEC(fract)

    // mod
    template <typename genType>
    GLM_FUNC_QUALIFIER genType mod
	(
		genType const & x, 
		genType const & y
	)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'mod' only accept floating-point inputs");

        return x - y * floor(x / y);
    }

	VECTORIZE_VEC_SCA(mod)
	VECTORIZE_VEC_VEC(mod)

    // modf
    template <typename genType>
    GLM_FUNC_QUALIFIER genType modf
	(
		genType const & x, 
		genType & i
	)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'modf' only accept floating-point inputs");

		return std::modf(x, &i);
    }

    template <typename valType>
    GLM_FUNC_QUALIFIER detail::tvec2<valType> modf
	(
		detail::tvec2<valType> const & x, 
		detail::tvec2<valType> & i
	)
    {
        return detail::tvec2<valType>(
            modf(x.x, i.x),
            modf(x.y, i.y));
    }

    template <typename valType>
    GLM_FUNC_QUALIFIER detail::tvec3<valType> modf
	(
		detail::tvec3<valType> const & x, 
		detail::tvec3<valType> & i
	)
    {
        return detail::tvec3<valType>(
            modf(x.x, i.x),
            modf(x.y, i.y),
            modf(x.z, i.z));
    }

    template <typename valType>
    GLM_FUNC_QUALIFIER detail::tvec4<valType> modf
	(
		detail::tvec4<valType> const & x, 
		detail::tvec4<valType> & i
	)
    {
        return detail::tvec4<valType>(
            modf(x.x, i.x),
            modf(x.y, i.y),
            modf(x.z, i.z),
            modf(x.w, i.w));
    }

	//// Only valid if (INT_MIN <= x-y <= INT_MAX)
	//// min(x,y)
	//r = y + ((x - y) & ((x - y) >> (sizeof(int) *
	//CHAR_BIT – 1)));
	//// max(x,y)
	//r = x - ((x - y) & ((x - y) >> (sizeof(int) *
	//CHAR_BIT - 1)));

    // min
    template <typename genType>
    GLM_FUNC_QUALIFIER genType min
	(
		genType const & x, 
		genType const & y
	)
    {
		GLM_STATIC_ASSERT(
			detail::type<genType>::is_float || 
			detail::type<genType>::is_int ||
			detail::type<genType>::is_uint, "'min' only accept numbers");

        return x < y ? x : y;
    }

	VECTORIZE_VEC_SCA(min)
	VECTORIZE_VEC_VEC(min)

    // max
    template <typename genType>
    GLM_FUNC_QUALIFIER genType max
	(
		genType const & x, 
		genType const & y
	)
    {
		GLM_STATIC_ASSERT(
			detail::type<genType>::is_float || 
			detail::type<genType>::is_int ||
			detail::type<genType>::is_uint, "'max' only accept numbers");

		return x > y ? x : y;
    }

	VECTORIZE_VEC_SCA(max)
	VECTORIZE_VEC_VEC(max)

    // clamp
    template <typename valType>
    GLM_FUNC_QUALIFIER valType clamp
	(
		valType const & x, 
		valType const & minVal, 
		valType const & maxVal
	)
    {
		GLM_STATIC_ASSERT(
			detail::type<valType>::is_float || 
			detail::type<valType>::is_int ||
			detail::type<valType>::is_uint, "'clamp' only accept numbers");
		
		// Old implementation, less predictable branching
		//if(x >= maxVal) return maxVal; 
        //if(x <= minVal) return minVal;
	    //return x;
		return max(min(x, maxVal), minVal);
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec2<T> clamp
	(
		detail::tvec2<T> const & x, 
		typename detail::tvec2<T>::value_type const & minVal, 
		typename detail::tvec2<T>::value_type const & maxVal
	)
    {
        return detail::tvec2<T>(
            clamp(x.x, minVal, maxVal),
            clamp(x.y, minVal, maxVal));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec3<T> clamp
	(
		detail::tvec3<T> const & x, 
		typename detail::tvec3<T>::value_type const & minVal, 
		typename detail::tvec3<T>::value_type const & maxVal
	)
    {
        return detail::tvec3<T>(
            clamp(x.x, minVal, maxVal),
            clamp(x.y, minVal, maxVal),
            clamp(x.z, minVal, maxVal));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec4<T> clamp
	(
		detail::tvec4<T> const & x, 
		typename detail::tvec4<T>::value_type const & minVal, 
		typename detail::tvec4<T>::value_type const & maxVal
	)
    {
        return detail::tvec4<T>(
            clamp(x.x, minVal, maxVal),
            clamp(x.y, minVal, maxVal),
            clamp(x.z, minVal, maxVal),
            clamp(x.w, minVal, maxVal));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec2<T> clamp
	(
		detail::tvec2<T> const & x, 
		detail::tvec2<T> const & minVal, 
		detail::tvec2<T> const & maxVal
	)
    {
        return detail::tvec2<T>(
            clamp(x.x, minVal.x, maxVal.x),
            clamp(x.y, minVal.y, maxVal.y));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec3<T> clamp
	(
		detail::tvec3<T> const & x, 
		detail::tvec3<T> const & minVal, 
		detail::tvec3<T> const & maxVal
	)
    {
        return detail::tvec3<T>(
            clamp(x.x, minVal.x, maxVal.x),
            clamp(x.y, minVal.y, maxVal.y),
            clamp(x.z, minVal.z, maxVal.z));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec4<T> clamp
	(
		detail::tvec4<T> const & x, 
		detail::tvec4<T> const & minVal, 
		detail::tvec4<T> const & maxVal
	)
    {
        return detail::tvec4<T>(
            clamp(x.x, minVal.x, maxVal.x),
            clamp(x.y, minVal.y, maxVal.y),
            clamp(x.z, minVal.z, maxVal.z),
            clamp(x.w, minVal.w, maxVal.w));
    }

	// mix
	template <typename genTypeT, typename genTypeU>
	GLM_FUNC_QUALIFIER genTypeT mix
	(
		genTypeT const & x, 
		genTypeT const & y, 
		genTypeU const & a
	)
	{
		// It could be a vector too
		//GLM_STATIC_ASSERT(
		//	detail::type<genTypeT>::is_float && 
		//	detail::type<genTypeU>::is_float);

		//return x + a * (y - x);
		return genTypeT(genTypeU(x) + a * genTypeU(y - x));
	}

	template <typename valTypeA, typename valTypeB>
	GLM_FUNC_QUALIFIER detail::tvec2<valTypeA> mix
	(
		detail::tvec2<valTypeA> const & x, 
		detail::tvec2<valTypeA> const & y, 
		valTypeB const & a
	)
	{
		return detail::tvec2<valTypeA>(
			detail::tvec2<valTypeB>(x) + a * detail::tvec2<valTypeB>(y - x));
	}

	template <typename valTypeA, typename valTypeB>
	GLM_FUNC_QUALIFIER detail::tvec3<valTypeA> mix
	(
		detail::tvec3<valTypeA> const & x, 
		detail::tvec3<valTypeA> const & y, 
		valTypeB const & a
	)
	{
		return detail::tvec3<valTypeA>(
			detail::tvec3<valTypeB>(x) + a * detail::tvec3<valTypeB>(y - x));
	}

	template <typename valTypeA, typename valTypeB>
	GLM_FUNC_QUALIFIER detail::tvec4<valTypeA> mix
	(
		detail::tvec4<valTypeA> const & x, 
		detail::tvec4<valTypeA> const & y, 
		valTypeB const & a
	)
	{
		return detail::tvec4<valTypeA>(
			detail::tvec4<valTypeB>(x) + a * detail::tvec4<valTypeB>(y - x));
	}

	template <typename valTypeA, typename valTypeB>
	GLM_FUNC_QUALIFIER detail::tvec2<valTypeA> mix
	(
		detail::tvec2<valTypeA> const & x, 
		detail::tvec2<valTypeA> const & y, 
		detail::tvec2<valTypeB> const & a
	)
	{
		return detail::tvec2<valTypeA>(
			detail::tvec2<valTypeB>(x) + a * detail::tvec2<valTypeB>(y - x));
	}

	template <typename valTypeA, typename valTypeB>
	GLM_FUNC_QUALIFIER detail::tvec3<valTypeA> mix
	(
		detail::tvec3<valTypeA> const & x, 
		detail::tvec3<valTypeA> const & y, 
		detail::tvec3<valTypeB> const & a
	)
	{
		return detail::tvec3<valTypeA>(
			detail::tvec3<valTypeB>(x) + a * detail::tvec3<valTypeB>(y - x));
	}

	template <typename valTypeA, typename valTypeB>
	GLM_FUNC_QUALIFIER detail::tvec4<valTypeA> mix
	(
		detail::tvec4<valTypeA> const & x, 
		detail::tvec4<valTypeA> const & y, 
		detail::tvec4<valTypeB> const & a
	)
	{
		return detail::tvec4<valTypeA>(
			detail::tvec4<valTypeB>(x) + a * detail::tvec4<valTypeB>(y - x));
	}

	//template <typename genTypeT>
	//GLM_FUNC_QUALIFIER genTypeT mix
	//(
	//	genTypeT const & x, 
	//	genTypeT const & y, 
	//	float const & a
	//)
	//{
	//	// It could be a vector too
	//	//GLM_STATIC_ASSERT(
	//	//	detail::type<genTypeT>::is_float && 
	//	//	detail::type<genTypeU>::is_float);

	//	return x + a * (y - x);
	//}

	template <typename genType>
	GLM_FUNC_QUALIFIER genType mix
	(
		genType const & x, 
		genType const & y, 
		bool const & a
	)
	{
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'mix' only accept floating-point inputs");

		return a ? y : x;
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tvec2<T> mix
	(
		detail::tvec2<T> const & x, 
		detail::tvec2<T> const & y, 
		typename detail::tvec2<T>::bool_type a
	)
	{
		GLM_STATIC_ASSERT(detail::type<T>::is_float, "'mix' only accept floating-point inputs");

		detail::tvec2<T> result;
		for
		(
			typename detail::tvec2<T>::size_type i = 0; 
			i < detail::tvec2<T>::value_size(); 
			++i
		)
		{
			result[i] = a[i] ? y[i] : x[i];
		}
		return result;
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tvec3<T> mix
	(
		detail::tvec3<T> const & x, 
		detail::tvec3<T> const & y, 
		typename detail::tvec3<T>::bool_type a
	)
	{
		GLM_STATIC_ASSERT(detail::type<T>::is_float, "'mix' only accept floating-point inputs");

		detail::tvec3<T> result;
		for
		(
			typename detail::tvec3<T>::size_type i = 0; 
			i < detail::tvec3<T>::value_size(); 
			++i
		)
		{
			result[i] = a[i] ? y[i] : x[i];
		}
		return result;
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tvec4<T> mix
	(
		detail::tvec4<T> const & x, 
		detail::tvec4<T> const & y, 
		typename detail::tvec4<T>::bool_type a
	)
	{
		GLM_STATIC_ASSERT(detail::type<T>::is_float, "'mix' only accept floating-point inputs");

		detail::tvec4<T> result;
		for
		(
			typename detail::tvec4<T>::size_type i = 0; 
			i < detail::tvec4<T>::value_size(); 
			++i
		)
		{
			result[i] = a[i] ? y[i] : x[i];
		}
		return result;
	}

	// step
    template <typename genType>
    GLM_FUNC_QUALIFIER genType step
	(
		genType const & edge, 
		genType const & x
	)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'mix' only accept floating-point inputs");

        return x < edge ? genType(0) : genType(1);
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec2<T> step
	(
		typename detail::tvec2<T>::value_type const & edge, 
		detail::tvec2<T> const & x
	)
    {
        return detail::tvec2<T>(
            x.x < edge ? T(0) : T(1),
            x.y < edge ? T(0) : T(1));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec3<T> step
	(
		typename detail::tvec3<T>::value_type const & edge, 
		detail::tvec3<T> const & x
	)
    {
		return detail::tvec3<T>(
			x.x < edge ? T(0) : T(1),
			x.y < edge ? T(0) : T(1),
			x.z < edge ? T(0) : T(1));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec4<T> step
	(
		typename detail::tvec4<T>::value_type const & edge, 
		detail::tvec4<T> const & x
	)
    {
        return detail::tvec4<T>(
            x.x < edge ? T(0) : T(1),
            x.y < edge ? T(0) : T(1),
            x.z < edge ? T(0) : T(1),
            x.w < edge ? T(0) : T(1));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec2<T> step
	(
		detail::tvec2<T> const & edge, 
		detail::tvec2<T> const & x
	)
    {
        return detail::tvec2<T>(
            x.x < edge.x ? T(0) : T(1),
            x.y < edge.y ? T(0) : T(1));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec3<T> step
	(
		detail::tvec3<T> const & edge, 
		detail::tvec3<T> const & x
	)
    {
        return detail::tvec3<T>(
            x.x < edge.x ? T(0) : T(1),
            x.y < edge.y ? T(0) : T(1),
            x.z < edge.z ? T(0) : T(1));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec4<T> step
	(
		detail::tvec4<T> const & edge, 
		detail::tvec4<T> const & x
	)
    {
        return detail::tvec4<T>(
            x.x < edge.x ? T(0) : T(1),
            x.y < edge.y ? T(0) : T(1),
            x.z < edge.z ? T(0) : T(1),
            x.w < edge.w ? T(0) : T(1));
    }

    // smoothstep
    template <typename genType>
    GLM_FUNC_QUALIFIER genType smoothstep
	(
		genType const & edge0, 
		genType const & edge1, 
		genType const & x
	)
    {
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'mix' only accept floating-point inputs");

        genType tmp = clamp((x - edge0) / (edge1 - edge0), genType(0), genType(1));
        return tmp * tmp * (genType(3) - genType(2) * tmp);
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec2<T> smoothstep
	(
		typename detail::tvec2<T>::value_type const & edge0, 
		typename detail::tvec2<T>::value_type const & edge1, 
		detail::tvec2<T> const & x
	)
    {
        return detail::tvec2<T>(
            smoothstep(edge0, edge1, x.x),
            smoothstep(edge0, edge1, x.y));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec3<T> smoothstep
	(
		typename detail::tvec3<T>::value_type const & edge0, 
		typename detail::tvec3<T>::value_type const & edge1, 
		detail::tvec3<T> const & x
	)
    {
        return detail::tvec3<T>(
            smoothstep(edge0, edge1, x.x),
            smoothstep(edge0, edge1, x.y),
            smoothstep(edge0, edge1, x.z));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec4<T> smoothstep
	(
		typename detail::tvec4<T>::value_type const & edge0, 
		typename detail::tvec4<T>::value_type const & edge1, 
		detail::tvec4<T> const & x
	)
    {
        return detail::tvec4<T>(
            smoothstep(edge0, edge1, x.x),
            smoothstep(edge0, edge1, x.y),
            smoothstep(edge0, edge1, x.z),
            smoothstep(edge0, edge1, x.w));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec2<T> smoothstep
	(
		detail::tvec2<T> const & edge0, 
		detail::tvec2<T> const & edge1, 
		detail::tvec2<T> const & x
	)
    {
        return detail::tvec2<T>(
            smoothstep(edge0.x, edge1.x, x.x),
            smoothstep(edge0.y, edge1.y, x.y));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec3<T> smoothstep
	(
		detail::tvec3<T> const & edge0, 
		detail::tvec3<T> const & edge1, 
		detail::tvec3<T> const & x
	)
    {
        return detail::tvec3<T>(
            smoothstep(edge0.x, edge1.x, x.x),
            smoothstep(edge0.y, edge1.y, x.y),
            smoothstep(edge0.z, edge1.z, x.z));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER detail::tvec4<T> smoothstep
	(
		detail::tvec4<T> const & edge0, 
		detail::tvec4<T> const & edge1, 
		detail::tvec4<T> const & x
	)
    {
        return detail::tvec4<T>(
            smoothstep(edge0.x, edge1.x, x.x),
            smoothstep(edge0.y, edge1.y, x.y),
            smoothstep(edge0.z, edge1.z, x.z),
            smoothstep(edge0.w, edge1.w, x.w));
    }

	template <typename genType> 
	GLM_FUNC_QUALIFIER bool isnan(genType const & x)
	{
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'isnan' only accept floating-point inputs");

#       if(GLM_COMPILER & GLM_COMPILER_VC)
            return _isnan(x) != 0;
#       elif(GLM_COMPILER & GLM_COMPILER_GCC)
#           if(GLM_PLATFORM & GLM_PLATFORM_ANDROID)
                return _isnan(x) != 0;
#           else
                return std::isnan(x) != 0;
#           endif
#       else
            return std::isnan(x) != 0;
#       endif
	}

    template <typename T>
    GLM_FUNC_QUALIFIER typename detail::tvec2<T>::bool_type isnan
	(
		detail::tvec2<T> const & x
	)
    {
        return typename detail::tvec2<T>::bool_type(
            isnan(x.x),
            isnan(x.y));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER typename detail::tvec3<T>::bool_type isnan
	(
		detail::tvec3<T> const & x
	)
    {
        return typename detail::tvec3<T>::bool_type(
            isnan(x.x),
            isnan(x.y),
            isnan(x.z));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER typename detail::tvec4<T>::bool_type isnan
	(
		detail::tvec4<T> const & x
	)
    {
        return typename detail::tvec4<T>::bool_type(
            isnan(x.x),
            isnan(x.y),
            isnan(x.z),
            isnan(x.w));
    }

	template <typename genType> 
	GLM_FUNC_QUALIFIER bool isinf(
		genType const & x)
	{
		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'isinf' only accept floating-point inputs");

#       if(GLM_COMPILER & GLM_COMPILER_VC)
            return _fpclass(x) == _FPCLASS_NINF || _fpclass(x) == _FPCLASS_PINF;
#       elif(GLM_COMPILER & GLM_COMPILER_GCC)
#           if(GLM_PLATFORM & GLM_PLATFORM_ANDROID)
                return _isinf(x) != 0;
#           else
                return std::isinf(x) != 0;
#           endif
#       else
            return std::isinf(x) != 0;
#       endif
	}

    template <typename T>
    GLM_FUNC_QUALIFIER typename detail::tvec2<T>::bool_type isinf
	(
		detail::tvec2<T> const & x
	)
    {
        return typename detail::tvec2<T>::bool_type(
            isinf(x.x),
            isinf(x.y));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER typename detail::tvec3<T>::bool_type isinf
	(
		detail::tvec3<T> const & x
	)
    {
        return typename detail::tvec3<T>::bool_type(
            isinf(x.x),
            isinf(x.y),
            isinf(x.z));
    }

    template <typename T>
    GLM_FUNC_QUALIFIER typename detail::tvec4<T>::bool_type isinf
	(
		detail::tvec4<T> const & x
	)
    {
        return typename detail::tvec4<T>::bool_type(
            isinf(x.x),
            isinf(x.y),
            isinf(x.z),
            isinf(x.w));
    }

	GLM_FUNC_QUALIFIER int floatBitsToInt(float const & value)
	{
		union
		{
			float f;
			int i;
		} fi;

		fi.f = value;
		return fi.i;
	}

    GLM_FUNC_QUALIFIER detail::tvec2<int> floatBitsToInt
	(
		detail::tvec2<float> const & value
	)
    {
        return detail::tvec2<int>(
            floatBitsToInt(value.x),
            floatBitsToInt(value.y));
    }

    GLM_FUNC_QUALIFIER detail::tvec3<int> floatBitsToInt
	(
		detail::tvec3<float> const & value
	)
    {
        return detail::tvec3<int>(
            floatBitsToInt(value.x),
			floatBitsToInt(value.y),
			floatBitsToInt(value.z));
    }

    GLM_FUNC_QUALIFIER detail::tvec4<int> floatBitsToInt
	(
		detail::tvec4<float> const & value
	)
    {
        return detail::tvec4<int>(
            floatBitsToInt(value.x),
			floatBitsToInt(value.y),
			floatBitsToInt(value.z),
			floatBitsToInt(value.w));
    }

	GLM_FUNC_QUALIFIER uint floatBitsToUint(float const & value)
	{
		union
		{
			float f;
			uint u;
		} fu;

		fu.f = value;
		return fu.u;
	}

    GLM_FUNC_QUALIFIER detail::tvec2<uint> floatBitsToUint
	(
		detail::tvec2<float> const & value
	)
    {
        return detail::tvec2<uint>(
            floatBitsToUint(value.x),
            floatBitsToUint(value.y));
    }

    GLM_FUNC_QUALIFIER detail::tvec3<uint> floatBitsToUint
	(
		detail::tvec3<float> const & value
	)
    {
        return detail::tvec3<uint>(
            floatBitsToUint(value.x),
			floatBitsToUint(value.y),
			floatBitsToUint(value.z));
    }

    GLM_FUNC_QUALIFIER detail::tvec4<uint> floatBitsToUint
	(
		detail::tvec4<float> const & value
	)
    {
        return detail::tvec4<uint>(
            floatBitsToUint(value.x),
			floatBitsToUint(value.y),
			floatBitsToUint(value.z),
			floatBitsToUint(value.w));
    }

	GLM_FUNC_QUALIFIER float intBitsToFloat(int const & value)
	{
		union
		{
			float f;
			int i;
		} fi;

		fi.i = value;
		return fi.f;
	}

	GLM_FUNC_QUALIFIER detail::tvec2<float> intBitsToFloat

	(
		detail::tvec2<int> const & value
	)
    {
        return detail::tvec2<float>(
            intBitsToFloat(value.x),
            intBitsToFloat(value.y));
    }

	GLM_FUNC_QUALIFIER detail::tvec3<float> intBitsToFloat
	(
		detail::tvec3<int> const & value
	)
    {
        return detail::tvec3<float>(
            intBitsToFloat(value.x),
			intBitsToFloat(value.y),
			intBitsToFloat(value.z));
    }

    GLM_FUNC_QUALIFIER detail::tvec4<float> intBitsToFloat
	(
		detail::tvec4<int> const & value
	)
    {
        return detail::tvec4<float>(
            intBitsToFloat(value.x),
			intBitsToFloat(value.y),
			intBitsToFloat(value.z),
			intBitsToFloat(value.w));
    }

    GLM_FUNC_QUALIFIER float uintBitsToFloat(uint const & value)
    {
        union
        {
            float f;
            uint u;
        } fu;

        fu.u = value;
        return fu.f;
    }

    GLM_FUNC_QUALIFIER detail::tvec2<float> uintBitsToFloat
	(
		detail::tvec2<uint> const & value
	)
    {
        return detail::tvec2<float>(
            uintBitsToFloat(value.x),
            uintBitsToFloat(value.y));
    }

    GLM_FUNC_QUALIFIER detail::tvec3<float> uintBitsToFloat
	(
		detail::tvec3<uint> const & value
	)
    {
        return detail::tvec3<float>(
            uintBitsToFloat(value.x),
			uintBitsToFloat(value.y),
			uintBitsToFloat(value.z));
    }

    GLM_FUNC_QUALIFIER detail::tvec4<float> uintBitsToFloat
	(
		detail::tvec4<uint> const & value
	)
    {
        return detail::tvec4<float>(
            uintBitsToFloat(value.x),
			uintBitsToFloat(value.y),
			uintBitsToFloat(value.z),
			uintBitsToFloat(value.w));
    }

	template <typename genType>
	GLM_FUNC_QUALIFIER genType fma
	(
		genType const & a, 
		genType const & b, 
		genType const & c
	)
	{
		return a * b + c;
	}

	template <typename genType>
	GLM_FUNC_QUALIFIER genType frexp
	(
		genType const & x, 
		int & exp
	)
	{
		return std::frexp(x, exp);
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tvec2<T> frexp
	(
		detail::tvec2<T> const & x, 
		detail::tvec2<int> & exp
	)
	{
		return std::frexp(x, exp);
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tvec3<T> frexp
	(
		detail::tvec3<T> const & x, 
		detail::tvec3<int> & exp
	)
	{
		return std::frexp(x, exp);
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tvec4<T> frexp
	(
		detail::tvec4<T> const & x, 
		detail::tvec4<int> & exp
	)
	{
		return std::frexp(x, exp);
	}

	template <typename genType>
	GLM_FUNC_QUALIFIER genType ldexp
	(
		genType const & x, 
		int const & exp
	)
	{
		return std::frexp(x, exp);
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tvec2<T> ldexp
	(
		detail::tvec2<T> const & x, 
		detail::tvec2<int> const & exp
	)
	{
		return std::frexp(x, exp);
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tvec3<T> ldexp
	(
		detail::tvec3<T> const & x, 
		detail::tvec3<int> const & exp
	)
	{
		return std::frexp(x, exp);
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tvec4<T> ldexp
	(
		detail::tvec4<T> const & x, 
		detail::tvec4<int> const & exp
	)
	{
		return std::frexp(x, exp);
	}

}//namespace glm
