SSE Example

#include <intrin.h>
#include <immintrin.h>
#include <smmintrin.h>
#include <wmmintrin.h>

#include <stdio.h>

typedef unsigned int u32;

u32 data[] = {
    1,
    2,
    3,
    4
};

u32 SingleSSE(u32 Count, u32 *Input)
{
    __m128i Sum = _mm_setzero_si128();
    for(u32 Index = 0; Index < Count; Index += 4)
    {
        Sum = _mm_add_epi32(Sum, _mm_load_si128((__m128i *)&Input[Index]));
    }

    Sum = _mm_hadd_epi32(Sum, Sum);
    Sum = _mm_hadd_epi32(Sum, Sum);

    return _mm_cvtsi128_si32(Sum);
}

#pragma optimize("", off)
int main(int ArgCount, char** Args)
{
    printf("%d", SingleSSE(4, data));
}