1 /* { dg-do run } */
2 /* { dg-require-effective-target avx2 } */
3 /* { dg-options "-O2 -mavx2" } */
4
5 #include <string.h>
6 #include "avx2-check.h"
7
8 static void
compute_i32gatherps(float * s1,int * s2,int scale,float * r)9 compute_i32gatherps (float *s1, int *s2, int scale, float *r)
10 {
11 int i;
12
13 for (i = 0; i < 4; ++i)
14 r[i] = *(float *) (((unsigned char *) s1) + s2[i] * scale);
15 }
16
17 void static
avx2_test(void)18 avx2_test (void)
19 {
20 int i;
21 union128i_d idx;
22 union128 res;
23 float s1[4], res_ref[4] = { 0 };
24
25 for (i = 0; i < 4; ++i)
26 {
27 /* Set some stuff */
28 s1[i] = 2.718281828459045 * (i + 1) * (i + 2);
29
30 /* About to gather in reverse order,
31 divide by 2 to demonstrate scale */
32 idx.a[i] = (16 - (i + 1) * 4) >> 1;
33 }
34
35 res.x = _mm_i32gather_ps (s1, idx.x, 2);
36
37 compute_i32gatherps (s1, idx.a, 2, res_ref);
38
39 if (check_union128 (res, res_ref) != 0)
40 abort ();
41 }
42