1/* { dg-do run } */ 2/* { dg-require-effective-target avx } */ 3/* { dg-options "-O2 -ftree-vectorize -mavx -mtune=generic" } */ 4 5#include "avx-check.h" 6 7#define N 16 8 9float b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45}; 10float c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; 11float d[N] = {0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30}; 12 13static void 14__attribute__ ((noinline)) 15avx_test () 16{ 17 int i; 18 float a[N]; 19 20 /* Strided access. Vectorizable on platforms that support load of strided 21 accesses (extract of even/odd vector elements). */ 22 for (i = 0; i < N/2; i++) 23 { 24 a[i] = b[2*i+1] * c[2*i+1] - b[2*i] * c[2*i]; 25 d[i] = b[2*i] * c[2*i+1] + b[2*i+1] * c[2*i]; 26 } 27 28 /* Check results. */ 29 for (i = 0; i < N/2; i++) 30 { 31 if (a[i] != b[2*i+1] * c[2*i+1] - b[2*i] * c[2*i] 32 || d[i] != b[2*i] * c[2*i+1] + b[2*i+1] * c[2*i]) 33 abort(); 34 } 35} 36