increment_sse2_64_4.hpp

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//============================================================================
// MCKL/include/mckl/random/internal/increment_sse2_64_4.hpp
//----------------------------------------------------------------------------
// MCKL: Monte Carlo Kernel Library
//----------------------------------------------------------------------------
// Copyright (c) 2013-2018, Yan Zhou
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
//
//   Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
//
//   Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
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//============================================================================

#ifndef MCKL_RANDOM_INTERNAL_INCREMENT_SSE2_64_4_HPP
#define MCKL_RANDOM_INTERNAL_INCREMENT_SSE2_64_4_HPP

#include <mckl/random/internal/increment_generic.hpp>

MCKL_PUSH_GCC_WARNING("-Wignored-attributes")

namespace mckl {

namespace internal {

template <typename T>
class IncrementBlockSI128<T, 1, 8, 64>
{
    static constexpr std::size_t K_ = 1;

  public:
    static void eval(const std::array<T, K_> &ctr, std::array<__m128i, 4> &s)
    {
        __m128i c = _mm_set1_epi64x(static_cast<MCKL_INT64>(std::get<0>(ctr)));

        std::get<0>(s) = _mm_add_epi64(c, _mm_set_epi64x(2, 1));
        std::get<1>(s) = _mm_add_epi64(c, _mm_set_epi64x(4, 3));
        std::get<2>(s) = _mm_add_epi64(c, _mm_set_epi64x(6, 5));
        std::get<3>(s) = _mm_add_epi64(c, _mm_set_epi64x(8, 7));
    }
}; // class IncrementBlockSI128

template <typename T>
class IncrementBlockSI128<T, 2, 4, 64>
{
    static constexpr std::size_t K_ = 2;

  public:
    static void eval(const std::array<T, K_> &ctr, std::array<__m128i, 4> &s)
    {
        __m128i c = _mm_set_epi64x(static_cast<MCKL_INT64>(std::get<1>(ctr)),
            static_cast<MCKL_INT64>(std::get<0>(ctr)));

        std::get<0>(s) = _mm_add_epi64(c, _mm_set_epi64x(0, 1));
        std::get<1>(s) = _mm_add_epi64(c, _mm_set_epi64x(0, 2));
        std::get<2>(s) = _mm_add_epi64(c, _mm_set_epi64x(0, 3));
        std::get<3>(s) = _mm_add_epi64(c, _mm_set_epi64x(0, 4));
    }
}; // class IncrementBlockSI128

template <typename T>
class IncrementBlockSI128<T, 4, 2, 64>
{
    static constexpr std::size_t K_ = 4;

  public:
    static void eval(const std::array<T, K_> &ctr, std::array<__m128i, 4> &s)
    {
        __m128i c = _mm_set_epi64x(static_cast<MCKL_INT64>(std::get<1>(ctr)),
            static_cast<MCKL_INT64>(std::get<0>(ctr)));

        std::get<0>(s) = _mm_add_epi64(c, _mm_set_epi64x(0, 1));
        std::get<1>(s) =
            _mm_set_epi64x(static_cast<MCKL_INT64>(std::get<3>(ctr)),
                static_cast<MCKL_INT64>(std::get<2>(ctr)));
        std::get<2>(s) = _mm_add_epi64(c, _mm_set_epi64x(0, 2));
        std::get<3>(s) = std::get<1>(s);
    }
}; // class IncrementBlockSI128

template <typename T>
class IncrementBlockSI128<T, 8, 1, 64>
{
    static constexpr std::size_t K_ = 8;

  public:
    static void eval(const std::array<T, K_> &ctr, std::array<__m128i, 4> &s)
    {
        std::memcpy(s.data(), ctr.data(), 64);
        std::get<0>(s) = _mm_add_epi64(std::get<0>(s), _mm_set_epi64x(0, 1));
    }
}; // class IncrementBlockSI128

} // namespace internal

} // namespace mckl

MCKL_POP_GCC_WARNING

#endif // MCKL_RANDOM_INTERNAL_INCREMENT_SSE2_64_4_HPP