Use X86 intrinsic to code split function

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C

SSE

intrinsics

Hi.

I am asked to use following four X86 intrinsics to code split function.
__m128i _mm_blendv_epi8 (__m128i a, __m128i b, __m128i mask)
__m128i _mm_shuffle_epi8 (__m128i a, __m128i b)
__m128i _mm_load_si128 (__m128i const* mem_addr)
void _mm_store_si128 (__m128i* mem_addr, __m128i a)

Given array is Arr[] = {1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3}.
I need to split this array into three arrays.
a[] = {1,1,1,1,1,1,1,1,1}
b[] = {2,2,2,2,2,2,2,2,2}
c[] = {3,3,3,3,3,3,3,3,3}

I have no experience of Intel SSE intrinsics..I only have C programming experience..
Please help me to solve this problem.

Thanks.

What I have tried:

In C, I would do like this...

for(int i = 0; i <size ; i++)
{ 
  a[i] = arr[i*3+0];
  b[i] = arr[i*3+1];
  c[i] = arr[i*3+2];
}