SaturatedCastPack.h

// SaturatedCastPack.h:
// ------------
//

#ifndef __IPSDKUTIL_INSTRUCTIONSET_DETAIL_AVX_SATURATEDCASTPACK_H__
#define __IPSDKUTIL_INSTRUCTIONSET_DETAIL_AVX_SATURATEDCASTPACK_H__

#include <IPSDKUtil/IPSDKUtilExports.h>
#include <IPSDKUtil/InstructionSet/BasePack.h>
#include <IPSDKUtil/InstructionSet/detail/CastPack.h>
#include <IPSDKUtil/InstructionSet/detail/SaturatedCastPack.h>
#include <IPSDKUtil/Tools/ForceInline.h>

namespace ipsdk {
namespace simd {
namespace detail {


template <typename TIn, typename TOut>
struct SaturatedCastPack<eInstructionSet::eIS_Avx, TIn, TOut,
    typename boost::enable_if_c<
        sizeof(TIn) <= sizeof(TOut)
    >::type
>
{ 
    static IPSDK_FORCEINLINE BasePack<ePackType::ePT_Avx, TOut> 
    act(const BasePack<ePackType::ePT_Avx, TIn>& in)
    {
        return CastPack<eInstructionSet::eIS_Avx, TIn, TOut>::act(in);
    }

    static IPSDK_FORCEINLINE
    void
    act(const BasePack<ePackType::ePT_Avx, TIn>& in,
        BasePack<ePackType::ePT_Avx, TOut> & out)
    {
        CastPack<eInstructionSet::eIS_Avx, TIn, TOut>::act(in, out);
    }
};

template <>
struct SaturatedCastPack<eInstructionSet::eIS_Avx, ipReal64, ipReal32>
{ 
    static IPSDK_FORCEINLINE BasePack<ePackType::ePT_Avx, ipReal32> 
    act(const BasePack<ePackType::ePT_Avx, ipReal64>& in)
    {
        BasePack<ePackType::ePT_Avx, ipReal64> clampedIn, packMin, packMax;
        simd::assign<eInstructionSet::eIS_Avx>(packMin, NumericLimits<ipReal32>::min());
        simd::assign<eInstructionSet::eIS_Avx>(packMax, NumericLimits<ipReal32>::max());
        simd::min<eInstructionSet::eIS_Avx>(packMax, in, clampedIn);
        simd::max<eInstructionSet::eIS_Avx>(packMin, clampedIn, clampedIn);

        return CastPack<eInstructionSet::eIS_Avx, ipReal64, ipReal32>::act(clampedIn);
    }

    static IPSDK_FORCEINLINE
    void
    act(const BasePack<ePackType::ePT_Avx, ipReal64>& in,
        BasePack<ePackType::ePT_Avx, ipReal32> & out)
    {
        BasePack<ePackType::ePT_Avx, ipReal64> clampedIn, packMin, packMax;
        simd::assign<eInstructionSet::eIS_Avx>(packMin, NumericLimits<ipReal32>::min());
        simd::assign<eInstructionSet::eIS_Avx>(packMax, NumericLimits<ipReal32>::max());
        simd::min<eInstructionSet::eIS_Avx>(packMax, in, clampedIn);
        simd::max<eInstructionSet::eIS_Avx>(packMin, clampedIn, clampedIn);

        CastPack<eInstructionSet::eIS_Avx, ipReal64, ipReal32>::act(clampedIn, out);
    }
};


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

#endif // __IPSDKUTIL_INSTRUCTIONSET_DETAIL_AVX_SATURATEDCASTPACK_H__