framework/delibs/decpp/deMath.hpp

#ifndef _DEMATH_HPP
#define _DEMATH_HPP
/*-------------------------------------------------------------------------
 * drawElements Base Portability Library
 * -------------------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief Basic mathematical operations.
 *//*--------------------------------------------------------------------*/

#include "deFloat16.h"
#include "deMath.h"

#include <limits>

DE_INLINE double	deToDouble	(deFloat16 x)	{ return deFloat16To64(x); }
DE_INLINE double	deToDouble	(float x)		{ return x; };
DE_INLINE double	deToDouble	(double x)		{ return x; };

template <typename T>
inline T deToFloatType(double x)
{
	return static_cast<T>(x);
}

template <>
inline deFloat16 deToFloatType<deFloat16>(double x)
{
	return deFloat64To16(x);
}

// These helpers make the C helpers usable from templates.  Because some of
// these deal with signaling NaN, it's important that no implicit float
// conversion operations happen.
DE_INLINE deBool	deIsPositiveZero	(deFloat16 x)	{ return deHalfIsPositiveZero(x); };
DE_INLINE deBool	deIsPositiveZero	(float x)		{ return deFloatIsPositiveZero(x); };
DE_INLINE deBool	deIsPositiveZero	(double x)		{ return deDoubleIsPositiveZero(x); };
DE_INLINE deBool	deIsNegativeZero	(deFloat16 x)	{ return deHalfIsNegativeZero(x); };
DE_INLINE deBool	deIsNegativeZero	(float x)		{ return deFloatIsNegativeZero(x); };
DE_INLINE deBool	deIsNegativeZero	(double x)		{ return deDoubleIsNegativeZero(x); };
DE_INLINE deBool	deIsIEEENaN			(deFloat16 x)	{ return deHalfIsIEEENaN(x); };
DE_INLINE deBool	deIsIEEENaN			(float x)		{ return deFloatIsIEEENaN(x); };
DE_INLINE deBool	deIsIEEENaN			(double x)		{ return deDoubleIsIEEENaN(x); };
DE_INLINE deBool	deIsSignalingNaN	(deFloat16 x)	{ return deHalfIsSignalingNaN(x); };
DE_INLINE deBool	deIsSignalingNaN	(float x)		{ return deFloatIsSignalingNaN(x); };
DE_INLINE deBool	deIsSignalingNaN	(double x)		{ return deDoubleIsSignalingNaN(x); };
DE_INLINE deBool	deIsQuietNaN		(deFloat16 x)	{ return deHalfIsQuietNaN(x); };
DE_INLINE deBool	deIsQuietNaN		(float x)		{ return deFloatIsQuietNaN(x); };
DE_INLINE deBool	deIsQuietNaN		(double x)		{ return deDoubleIsQuietNaN(x); };

template<typename T>
inline T deQuietNaN()
{
	return std::numeric_limits<T>::quiet_NaN();
}

template<>
inline deFloat16 deQuietNaN<deFloat16>()
{
	return deFloat16QuietNaN;
}

template<typename T>
inline T deSignalingNaN()
{
	return std::numeric_limits<T>::signaling_NaN();
}

template<>
inline deFloat16 deSignalingNaN<deFloat16>()
{
	return deFloat16SignalingNaN;
}

#endif // _DEMATH_HPP