Viewing file:  avx512f-i32gatherpd512-2.c (1.15 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-options "-mavx512f -O2 -mtune=knl" } */
/* { dg-require-effective-target avx512f } */
#include "avx512f-check.h"
#define SCALE 2
static void
compute_gatherdpd (double *res, __mmask8 m8, int *idx,
double *src, int scale, double *r)
{
int i;
for (i = 0; i < 8; i++)
{
if (m8 & (1 << i))
r[i] = *(double *) (((unsigned char *) src) + idx[i] * scale);
else
r[i] = res[i];
}
}
static void
avx512f_test (void)
{
int i;
union512d res;
union256i_d idx;
double src[8];
double res_ref[8];
__mmask8 m8 = 0xC5;
res.x = _mm512_setzero_pd();
for (i = 0; i < 8; i++)
{
src[i] = 2.718281828459045 * (i + 1) * (i + 2);
/* About to gather in reverse order,
divide by 2 to demonstrate scale */
idx.a[i] = (64 - (i + 1) * 8) >> 1;
}
res.x = _mm512_mask_i32gather_pd (res.x, m8, idx.x, src, SCALE);
compute_gatherdpd (res.a, m8, idx.a, src, SCALE, res_ref);
if (check_union512d (res, res_ref))
abort ();
res.x = _mm512_i32gather_pd (idx.x, src, SCALE);
compute_gatherdpd (res.a, 0xFF, idx.a, src, SCALE, res_ref);
if (check_union512d (res, res_ref))
abort ();
}
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