IsEvenReg.h

Go to the documentation of this file.

// IsEvenReg.h:
// -------------------
//

#ifndef __IPSDKUTIL_INSTRUCTIONSET_ARITHMETIC_DETAIL_COMMON_ISEVENREG_H__
#define __IPSDKUTIL_INSTRUCTIONSET_ARITHMETIC_DETAIL_COMMON_ISEVENREG_H__

#include <IPSDKUtil/IPSDKUtilExports.h>
#include <IPSDKUtil/InstructionSet/RegType.h>
#include <IPSDKUtil/InstructionSet/detail/AssignReg.h>
#include <IPSDKUtil/InstructionSet/Arithmetic/detail/FloorReg.h>
#include <IPSDKUtil/InstructionSet/Arithmetic/detail/MulReg.h>
#include <IPSDKUtil/InstructionSet/Comparison/detail/IsEqualReg.h>
#include <IPSDKUtil/InstructionSet/Logical/detail/BitwiseAndReg.h>
#include <IPSDKUtil/Tools/ForceInline.h>

#include <boost/type_traits/is_integral.hpp>

namespace ipsdk {
namespace simd {
namespace detail {


template <eInstructionSet::domain IS, typename T>
struct IsEvenReg<IS, T, typename boost::enable_if<typename boost::is_integral<T>::type>::type>
{
    static IPSDK_FORCEINLINE
    typename RegMaskType<IS, T>::Type
    act(const typename RegType<IS, T>::Type& in)
    {
        typename RegType<IS, T>::Type out;
        act(in, out);
        return out;
    }

    static IPSDK_FORCEINLINE
    void
    act(const typename RegType<IS, T>::Type& in,
        typename RegMaskType<IS, T>::Type& out)
    {
        typedef typename RegType<IS, T>::Type Reg;
        
        Reg one, inAndOne, zero;
        AssignReg<IS, T>::act(zero, 0);
        AssignReg<IS, T>::act(one, 1);
        BitwiseAndReg<IS, T>::act(in, one, inAndOne);
        IsEqualReg<IS, T>::act(inAndOne, zero, out);
    }
};

template <eInstructionSet::domain IS>
struct IsEvenReg<IS, ipReal32>
{
    static IPSDK_FORCEINLINE
    typename RegMaskType<IS, ipReal32>::Type
    act(const typename RegType<IS, ipReal32>::Type& in)
    {
        typename RegMaskType<IS, ipReal32>::Type out;
        act(in, out);
        return out;
    }

    static IPSDK_FORCEINLINE
    void
    act(const typename RegType<IS, ipReal32>::Type& in,
        typename RegMaskType<IS, ipReal32>::Type& out)
    {
        typedef typename RegType<IS, ipReal32>::Type Reg;
        
        Reg halfOne, halfIn, halfInFloor;
        AssignReg<IS, ipReal32>::act(halfOne, 0.5f);
        MulReg<IS, ipReal32>::act(in, halfOne, halfIn);
        FloorReg<IS, ipReal32>::act(halfIn, halfInFloor);
        IsEqualReg<IS, ipReal32>::act(halfIn, halfInFloor, out);
    }
};


} // end of namespace detail
} // end of namespace simd
} // end of namespace ipsdk

#endif // __IPSDKUTIL_INSTRUCTIONSET_ARITHMETIC_DETAIL_COMMON_ISEVENREG_H__