/***************************************************************************
* Copyright (c) 2016, Wolf Vollprecht, Johan Mabille, Sylvain Corlay and   *
* Martin Renou                                                             *
*                                                                          *
* Distributed under the terms of the BSD 3-Clause License.                 *
*                                                                          *
* The full license is in the file LICENSE, distributed with this software. *
****************************************************************************/

#ifndef XSIMD_NEON_UINT32_HPP
#define XSIMD_NEON_UINT32_HPP

#include <utility>

#include "xsimd_base.hpp"
#include "xsimd_neon_bool.hpp"
#include "xsimd_neon_utils.hpp"

namespace xsimd
{
    /**********************
     * batch<uint32_t, 4> *
     **********************/

    template <>
    struct simd_batch_traits<batch<uint32_t, 4>>
    {
        using value_type = uint32_t;
        static constexpr std::size_t size = 4;
        using batch_bool_type = batch_bool<uint32_t, 4>;
        static constexpr std::size_t align = XSIMD_DEFAULT_ALIGNMENT;
    };

    template <>
    class batch<uint32_t, 4> : public simd_batch<batch<uint32_t, 4>>
    {
    public:

        using simd_type = uint32x4_t;

        using base_type = simd_batch<batch<uint32_t, 4>>;

        batch();
        explicit batch(uint32_t src);

        template <class... Args, class Enable = detail::is_array_initializer_t<uint32_t, 4, Args...>>
        batch(Args... args);
        explicit batch(const uint32_t* src);

        batch(const uint32_t* src, aligned_mode);
        batch(const uint32_t* src, unaligned_mode);

        batch(const simd_type& rhs);
        batch& operator=(const simd_type& rhs);

        operator simd_type() const;

        XSIMD_DECLARE_LOAD_STORE_ALL(uint32_t, 4)
        XSIMD_DECLARE_LOAD_STORE_LONG(uint32_t, 4)

        using base_type::load_aligned;
        using base_type::load_unaligned;
        using base_type::store_aligned;
        using base_type::store_unaligned;

        uint32_t operator[](std::size_t index) const;

    private:

        simd_type m_value;
    };

    batch<uint32_t, 4> operator<<(const batch<uint32_t, 4>& lhs, int32_t rhs);
    batch<uint32_t, 4> operator>>(const batch<uint32_t, 4>& lhs, int32_t rhs);
    batch<uint32_t, 4> operator<<(const batch<uint32_t, 4>& lhs, const batch<int32_t, 4>& rhs);

    /*************************************
     * batch<uint32_t, 4> implementation *
     *************************************/

    inline batch<uint32_t, 4>::batch()
    {
    }

    inline batch<uint32_t, 4>::batch(uint32_t src)
        : m_value(vdupq_n_u32(src))
    {
    }

    template <class... Args, class>
    inline batch<uint32_t, 4>::batch(Args... args)
        : m_value{static_cast<uint32_t>(args)...}
    {
    }

    inline batch<uint32_t, 4>::batch(const uint32_t* src)
        : m_value(vld1q_u32(src))
    {
    }

    inline batch<uint32_t, 4>::batch(const uint32_t* src, aligned_mode)
        : batch(src)
    {
    }

    inline batch<uint32_t, 4>::batch(const uint32_t* src, unaligned_mode)
        : batch(src)
    {
    }

    inline batch<uint32_t, 4>::batch(const simd_type& rhs)
        : m_value(rhs)
    {
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::operator=(const simd_type& rhs)
    {
        m_value = rhs;
        return *this;
    }

    XSIMD_DEFINE_LOAD_STORE(uint32_t, 4, int8_t, XSIMD_DEFAULT_ALIGNMENT)
    XSIMD_DEFINE_LOAD_STORE(uint32_t, 4, uint8_t, XSIMD_DEFAULT_ALIGNMENT)

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_aligned(const int16_t* src)
    {
        int16x4_t tmp = vld1_s16((const int16_t*)src);
        m_value = vreinterpretq_u32_s32(vmovl_s16(tmp));
        return *this;
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_unaligned(const int16_t* src)
    {
        return load_aligned(src);
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_aligned(const uint16_t* src)
    {
        uint16x4_t tmp = vld1_u16((const uint16_t*)src);
        m_value = vmovl_u16(tmp);
        return *this;
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_unaligned(const uint16_t* src)
    {
        return load_aligned(src);
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_aligned(const int32_t* src)
    {
        m_value = vreinterpretq_u32_s32(vld1q_s32(src));
        return *this;
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_unaligned(const int32_t* src)
    {
        return load_aligned(src);
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_aligned(const uint32_t* src)
    {
        m_value = vld1q_u32(src);
        return *this;
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_unaligned(const uint32_t* src)
    {
        return load_aligned(src);
    }

    XSIMD_DEFINE_LOAD_STORE(uint32_t, 4, int64_t, XSIMD_DEFAULT_ALIGNMENT)
    XSIMD_DEFINE_LOAD_STORE(uint32_t, 4, uint64_t, XSIMD_DEFAULT_ALIGNMENT)
    XSIMD_DEFINE_LOAD_STORE_LONG(uint32_t, 4, 64)

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_aligned(const float* src)
    {
        m_value = vcvtq_u32_f32(vld1q_f32(src));
        return *this;
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_unaligned(const float* src)
    {
        m_value = vcvtq_u32_f32(vld1q_f32(src));
        return *this;
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_aligned(const double* src)
    {
    #if XSIMD_ARM_INSTR_SET >= XSIMD_ARM8_64_NEON_VERSION
        float32x2_t tmp_l = vcvtx_f32_f64(float64x2_t{src[0], src[1]});
        float32x2_t tmp_h = vcvtx_f32_f64(float64x2_t{src[2], src[3]});
        m_value = vcvtq_u32_f32(vcombine_f32(tmp_l, tmp_h));
        return *this;
    #else
        m_value = uint32x4_t{
            static_cast<uint32_t>(src[0]),
            static_cast<uint32_t>(src[1]),
            static_cast<uint32_t>(src[2]),
            static_cast<uint32_t>(src[3])
        };
    #endif
        return *this;
    }

    inline batch<uint32_t, 4>& batch<uint32_t, 4>::load_unaligned(const double* src)
    {
        return load_aligned(src);
    }

    inline void batch<uint32_t, 4>::store_aligned(int16_t* dst) const
    {
        int16x4_t tmp = vmovn_s32(vreinterpretq_s32_u32(m_value));
        vst1_s16((int16_t*)dst, tmp);
    }

    inline void batch<uint32_t, 4>::store_unaligned(int16_t* dst) const
    {
        store_aligned(dst);
    }

    inline void batch<uint32_t, 4>::store_aligned(uint16_t* dst) const
    {
        uint16x4_t tmp = vmovn_u32(m_value);
        vst1_u16((uint16_t*)dst, tmp);
    }

    inline void batch<uint32_t, 4>::store_unaligned(uint16_t* dst) const
    {
        store_aligned(dst);
    }

    inline void batch<uint32_t, 4>::store_aligned(int32_t* dst) const
    {
        vst1q_s32(dst, vreinterpretq_s32_u32(m_value));
    }

    inline void batch<uint32_t, 4>::store_unaligned(int32_t* dst) const
    {
        store_aligned(dst);
    }

    inline void batch<uint32_t, 4>::store_aligned(uint32_t* dst) const
    {
        vst1q_u32(dst, m_value);
    }

    inline void batch<uint32_t, 4>::store_unaligned(uint32_t* dst) const
    {
        store_aligned(dst);
    }

    inline void batch<uint32_t, 4>::store_aligned(float* dst) const
    {
        vst1q_f32(dst, vcvtq_f32_u32(m_value));
    }

    inline void batch<uint32_t, 4>::store_unaligned(float* dst) const
    {
        store_aligned(dst);
    }

    inline void batch<uint32_t, 4>::store_aligned(double* dst) const
    {
        alignas(16) uint32_t tmp[4];
        vst1q_u32(tmp, m_value);
        dst[0] = static_cast<double>(tmp[0]);
        dst[1] = static_cast<double>(tmp[1]);
        dst[2] = static_cast<double>(tmp[2]);
        dst[3] = static_cast<double>(tmp[3]);
    }

    inline void batch<uint32_t, 4>::store_unaligned(double* dst) const
    {
        store_aligned(dst);
    }

    inline batch<uint32_t, 4>::operator simd_type() const
    {
        return m_value;
    }

    inline uint32_t batch<uint32_t, 4>::operator[](std::size_t index) const
    {
        return m_value[index];
    }

    namespace detail
    {
        template <>
        struct batch_kernel<uint32_t, 4>
        {
            using batch_type = batch<uint32_t, 4>;
            using value_type = uint32_t;
            using batch_bool_type = batch_bool<uint32_t, 4>;

            static batch_type neg(const batch_type& rhs)
            {
                return vreinterpretq_u32_s32(vnegq_s32(vreinterpretq_s32_u32(rhs)));
            }

            static batch_type add(const batch_type& lhs, const batch_type& rhs)
            {
                return vaddq_u32(lhs, rhs);
            }

            static batch_type sub(const batch_type& lhs, const batch_type& rhs)
            {
                return vsubq_u32(lhs, rhs);
            }

            static batch_type mul(const batch_type& lhs, const batch_type& rhs)
            {
                return vmulq_u32(lhs, rhs);
            }

            static batch_type div(const batch_type& lhs, const batch_type& rhs)
            {
#if defined(XSIMD_FAST_INTEGER_DIVISION)
                return vcvtq_u32_f32(vcvtq_f32_u32(lhs) / vcvtq_f32_u32(rhs));
#else
                return neon_detail::unroll_op<4, uint32x4_t, uint32_t>([&lhs, &rhs] (std::size_t idx) {
                    return lhs[idx] / rhs[idx];
                });
#endif
            }

            static batch_type mod(const batch_type& lhs, const batch_type& rhs)
            {
                return neon_detail::unroll_op<4, uint32x4_t, uint32_t>([&lhs, &rhs] (std::size_t idx) {
                    return lhs[idx] % rhs[idx];
                });
            }

            static batch_bool_type eq(const batch_type& lhs, const batch_type& rhs)
            {
                return vceqq_u32(lhs, rhs);
            }

            static batch_bool_type neq(const batch_type& lhs, const batch_type& rhs)
            {
                return !(lhs == rhs);
            }

            static batch_bool_type lt(const batch_type& lhs, const batch_type& rhs)
            {
                return vcltq_u32(lhs, rhs);
            }

            static batch_bool_type lte(const batch_type& lhs, const batch_type& rhs)
            {
                return vcleq_u32(lhs, rhs);
            }

            static batch_type bitwise_and(const batch_type& lhs, const batch_type& rhs)
            {
                return vandq_u32(lhs, rhs);
            }

            static batch_type bitwise_or(const batch_type& lhs, const batch_type& rhs)
            {
                return vorrq_u32(lhs, rhs);
            }

            static batch_type bitwise_xor(const batch_type& lhs, const batch_type& rhs)
            {
                return veorq_u32(lhs, rhs);
            }

            static batch_type bitwise_not(const batch_type& rhs)
            {
                return vmvnq_u32(rhs);
            }

            static batch_type bitwise_andnot(const batch_type& lhs, const batch_type& rhs)
            {
                return vbicq_u32(lhs, rhs);
            }

            static batch_type min(const batch_type& lhs, const batch_type& rhs)
            {
                return vminq_u32(lhs, rhs);
            }

            static batch_type max(const batch_type& lhs, const batch_type& rhs)
            {
                return vmaxq_u32(lhs, rhs);
            }

            static batch_type abs(const batch_type& rhs)
            {
                return rhs;
            }

            static batch_type fma(const batch_type& x, const batch_type& y, const batch_type& z)
            {
                return x * y + z;
            }

            static batch_type fms(const batch_type& x, const batch_type& y, const batch_type& z)
            {
                return x * y - z;
            }

            static batch_type fnma(const batch_type& x, const batch_type& y, const batch_type& z)
            {
                return -x * y + z;
            }

            static batch_type fnms(const batch_type& x, const batch_type& y, const batch_type& z)
            {
                return -x * y - z;
            }

            static value_type hadd(const batch_type& rhs)
            {
#if XSIMD_ARM_INSTR_SET >= XSIMD_ARM8_64_NEON_VERSION
                return vaddvq_u32(rhs);
#else
                uint32x2_t tmp = vpadd_u32(vget_low_u32(rhs), vget_high_u32(rhs));
                tmp = vpadd_u32(tmp, tmp);
                return vget_lane_u32(tmp, 0);
#endif
            }

            static batch_type select(const batch_bool_type& cond, const batch_type& a, const batch_type& b)
            {
                return vbslq_u32(cond, a, b);
            }
        };

        inline batch<uint32_t, 4> shift_left(const batch<uint32_t, 4>& lhs, const int n)
        {
            switch(n)
            {
                case 0: return lhs;
                XSIMD_REPEAT_32(vshlq_n_u32);
                default: break;
            }
            return batch<uint32_t, 4>(uint32_t(0));
        }

        inline batch<uint32_t, 4> shift_right(const batch<uint32_t, 4>& lhs, const int n)
        {
            switch(n)
            {
                case 0: return lhs;
                XSIMD_REPEAT_32(vshrq_n_u32);
                default: break;
            }
            return batch<uint32_t, 4>(uint32_t(0));
        }
    }

    inline batch<uint32_t, 4> operator<<(const batch<uint32_t, 4>& lhs, int32_t rhs)
    {
        return detail::shift_left(lhs, rhs);
    }

    inline batch<uint32_t, 4> operator>>(const batch<uint32_t, 4>& lhs, int32_t rhs)
    {
        return detail::shift_right(lhs, rhs);
    }

    inline batch<uint32_t, 4> operator<<(const batch<uint32_t, 4>& lhs, const batch<int32_t, 4>& rhs)
    {
        return vshlq_u32(lhs, rhs);
    }
}

#endif
