Viewing file:  vect-avg-16.c (1.17 KB) -rw-r--r--
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/* { dg-additional-options "-O3" } */
/* { dg-require-effective-target vect_int } */
#include "tree-vect.h"
#define N 80
void __attribute__ ((noipa))
f (signed char *restrict a, signed char *restrict b,
signed char *restrict c, int n)
{
for (int j = 0; j < n; ++j)
{
for (int i = 0; i < 16; ++i)
a[i] = (b[i] + c[i]) >> 1;
a += 20;
b += 20;
c += 20;
}
}
#define BASE1 -126
#define BASE2 -42
signed char a[N], b[N], c[N];
int
main (void)
{
check_vect ();
for (int i = 0; i < N; ++i)
{
a[i] = i;
b[i] = BASE1 + i * 3;
c[i] = BASE2 + i * 2;
asm volatile ("" ::: "memory");
}
f (a, b, c, N / 20);
for (int i = 0; i < N; ++i)
{
int d = (BASE1 + BASE2 + i * 5) >> 1;
if (a[i] != (i % 20 < 16 ? d : i))
__builtin_abort ();
}
return 0;
}
/* { dg-final { scan-tree-dump "vect_recog_average_pattern: detected" "vect" } } */
/* { dg-final { scan-tree-dump {\.AVG_FLOOR} "vect" { target vect_avg_qi } } } */
/* { dg-final { scan-tree-dump "Loop contains only SLP stmts" "vect" { target vect_avg_qi } } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" { target vect_avg_qi } } } */
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