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