Viewing file:  avx2-vpmaddubsw-2.c (1.11 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-options "-mavx2 -O2" } */
/* { dg-require-effective-target avx2 } */
#include "avx2-check.h"
#include "ssse3-vals.h"
static short
signed_saturate_to_word (int x)
{
if (x > (int) 0x7fff)
return 0x7fff;
if (x < (int) 0xffff8000)
return 0x8000;
return (short) x;
}
static void
compute_pmaddubsw256 (short *i1, short *i2, short *r)
{
unsigned char *ub1 = (unsigned char *) i1;
char *sb2 = (char *) i2;
short *sout = (short *) r;
int t0;
int i;
for (i = 0; i < 16; i++)
{
t0 = ((int) ub1[2 * i] * (int) sb2[2 * i] +
(int) ub1[2 * i + 1] * (int) sb2[2 * i + 1]);
sout[i] = signed_saturate_to_word (t0);
}
}
static void
avx2_test (void)
{
union256i_w s1, s2, res;
short res_ref[16];
int i;
int fail = 0;
for (i = 0; i < 256; i += 16)
{
s1.x = _mm256_loadu_si256 ((__m256i *) & vals[i]);
s2.x = _mm256_loadu_si256 ((__m256i *) & vals[i + 8]);
res.x = _mm256_maddubs_epi16 (s1.x, s2.x);
compute_pmaddubsw256 (s1.a, s2.a, res_ref);
fail += check_union256i_w (res, res_ref);
}
if (fail != 0)
abort ();
}
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