broadcast.c

#include <stdio.h>
#include <smmintrin.h> //SSE4_1
#include <emmintrin.h> //SSE2

void print128_num(__m128i var) 
{
    //int64_t *v64val = (int64_t*) &var;
    //printf("%.16llx %.16llx\n", v64val[1], v64val[0]);


    int a = _mm_extract_epi8 (var, 0);
    int b = _mm_extract_epi8 (var, 1);
    int c = _mm_extract_epi8 (var, 2);
    int d = _mm_extract_epi8 (var, 3);
    int e = _mm_extract_epi8 (var, 4);
    int f = _mm_extract_epi8 (var, 5);
    int g = _mm_extract_epi8 (var, 6);
    int h = _mm_extract_epi8 (var, 7);
    int i = _mm_extract_epi8 (var, 8);
    int j = _mm_extract_epi8 (var, 9);
    int k = _mm_extract_epi8 (var, 10);
    int l = _mm_extract_epi8 (var, 11);
    int m = _mm_extract_epi8 (var, 12);
    int n = _mm_extract_epi8 (var, 13);
    int o = _mm_extract_epi8 (var, 14);
    int p = _mm_extract_epi8 (var, 15);
    printf("(%d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %d)",a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p);
}

int main()
{
  __m128i a = _mm_set_epi32(0,0,0,0);
  __m128i b = _mm_insert_epi8 (a, 5, 0);
  __m128i c = _mm_insert_epi8 (b, 5, 1);
  __m128i d = _mm_insert_epi8 (c, 5, 2);
  __m128i e = _mm_insert_epi8 (d, 5, 3);
  __m128i f = _mm_insert_epi8 (e, 5, 4);
  __m128i g = _mm_insert_epi8 (f, 5, 5);
  __m128i h = _mm_insert_epi8 (g, 5, 6);
  __m128i i = _mm_insert_epi8 (h, 5, 7);
  __m128i j = _mm_insert_epi8 (i, 5, 8);
  __m128i k = _mm_insert_epi8 (j, 5, 9);
  __m128i l = _mm_insert_epi8 (k, 5, 10);
  __m128i m = _mm_insert_epi8 (l, 5, 11);
  __m128i n = _mm_insert_epi8 (m, 5, 12);
  __m128i o = _mm_insert_epi8 (n, 5, 13);
  __m128i p = _mm_insert_epi8 (o, 5, 14);
  __m128i r = _mm_insert_epi8 (p, 5, 15);
  print128_num(r);

  return 0;
}

//gcc-7 -msse4.1 -Wall broadcast.c
//(5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5)