Viewing file:  avx512f-vect-fmaddsubXXXpd.c (1.2 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-require-effective-target avx512f } */
/* { dg-options "-O3 -mfma -save-temps -mavx512f -mprefer-vector-width=512" } */
#include "fma-check.h"
void __attribute__((noipa))
check_fmaddsub (double * __restrict a, double *b, double *c, int n)
{
for (int i = 0; i < n; ++i)
{
a[8*i + 0] = b[8*i + 0] * c[8*i + 0] - a[8*i + 0];
a[8*i + 1] = b[8*i + 1] * c[8*i + 1] + a[8*i + 1];
a[8*i + 2] = b[8*i + 2] * c[8*i + 2] - a[8*i + 2];
a[8*i + 3] = b[8*i + 3] * c[8*i + 3] + a[8*i + 3];
a[8*i + 4] = b[8*i + 4] * c[8*i + 4] - a[8*i + 4];
a[8*i + 5] = b[8*i + 5] * c[8*i + 5] + a[8*i + 5];
a[8*i + 6] = b[8*i + 6] * c[8*i + 6] - a[8*i + 6];
a[8*i + 7] = b[8*i + 7] * c[8*i + 7] + a[8*i + 7];
}
}
static void
fma_test (void)
{
if (!__builtin_cpu_supports ("avx512f"))
return;
double a[8], b[8], c[8];
for (int i = 0; i < 8; ++i)
{
a[i] = i;
b[i] = 3*i;
c[i] = 7*i;
}
check_fmaddsub (a, b, c, 1);
const double d[8] = { 0., 22., 82., 192., 332., 530., 750., 1036.};
for (int i = 0; i < 8; ++i)
if (a[i] != d[i])
__builtin_abort ();
}
/* { dg-final { scan-assembler {(?n)fmaddsub...pd[ \t].*%zmm[0-9]} } } */
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