ShDataType.hpp

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// Sh: A GPU metaprogramming language.
//
// Copyright (c) 2003 University of Waterloo Computer Graphics Laboratory
// Project administrator: Michael D. McCool
// Authors: Zheng Qin, Stefanus Du Toit, Kevin Moule, Tiberiu S. Popa,
//          Michael D. McCool
// 
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
// 
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 
// 1. The origin of this software must not be misrepresented; you must
// not claim that you wrote the original software. If you use this
// software in a product, an acknowledgment in the product documentation
// would be appreciated but is not required.
// 
// 2. Altered source versions must be plainly marked as such, and must
// not be misrepresented as being the original software.
// 
// 3. This notice may not be removed or altered from any source
// distribution.
#ifndef SHDATATYPE_HPP
#define SHDATATYPE_HPP

#include "ShUtility.hpp"
#include "ShVariableType.hpp"
#include "ShInterval.hpp"
#include "ShHalf.hpp"
#include "ShFraction.hpp"
#include "ShStorageType.hpp"

namespace SH {
enum ShDataType {
  SH_HOST,  //< computation data type on the host
  SH_MEM,  //< data type stored in memory on the host
  SH_DATATYPE_END
};

SH_DLLEXPORT
extern const char* dataTypeName[];

template<typename T, ShDataType DT> struct ShDataTypeCppType; 

template<typename T> struct ShDataTypeCppType<T, SH_HOST> { typedef T type; }; 
template<typename T> struct ShDataTypeCppType<T, SH_MEM> { typedef T type; }; 

// define special cases here
#define SH_VALUETYPE_DATATYPE(T, hostType, memType)\
  template<> struct ShDataTypeCppType<T, SH_HOST> { typedef hostType type; }; \
  template<> struct ShDataTypeCppType<T, SH_MEM> { typedef memType type; }; 

SH_VALUETYPE_DATATYPE(ShHalf, float, ShHalf); 

template<typename T> struct ShHostType { typedef typename ShDataTypeCppType<T, SH_HOST>::type type; };
template<typename T> struct ShMemType { typedef typename ShDataTypeCppType<T, SH_MEM>::type type; };
// @}

template<typename T, ShDataType DT> 
struct ShDataTypeConstant {
    typedef typename ShDataTypeCppType<T, DT>::type type;
    static const type Zero; /* additive identity and also a true value */ \
    static const type One; /* multiplicative identity also a false value */ \
};

template<typename T, ShDataType DT>
const typename ShDataTypeCppType<T, DT>::type ShDataTypeConstant<T, DT>::Zero = 
  (typename ShDataTypeCppType<T, DT>::type)(0.0); 

template<typename T, ShDataType DT>
const typename ShDataTypeCppType<T, DT>::type ShDataTypeConstant<T, DT>::One = 
  (typename ShDataTypeCppType<T, DT>::type)(1.0); 
// @}

template<typename T, ShDataType DT>
inline
typename ShDataTypeCppType<T, DT>::type shDataTypeCond(bool cond);

template<typename T>
inline
bool shDataTypeEqual(const T &a, const T &b);
// @}

template<typename T>
inline
bool shDataTypeIsPositive(const T &a);


template<typename T1, ShDataType DT1, typename T2, ShDataType DT2>
void shDataTypeCast(typename ShDataTypeCppType<T1, DT1>::type &dest,
                    const typename ShDataTypeCppType<T2, DT2>::type &src);

}

#include "ShDataTypeImpl.hpp"

#endif

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