1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
/* { dg-do run } */
/* { dg-options "-O3 -fwrapv" } */
/* Make sure vectorized absolute difference behaves same as scalar version. */
#define N 16
signed char a[] = {-100, -100, -100, -100,-100, -100, -100, -100, -100, -100, -100, -100, -100, -100, -100, -100 };
signed char b[] = { 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100 };
signed char out[N];
__attribute__ ((noinline,noipa))
void
foo (void)
{
for (int i = 0; i < N; i++)
{
signed char diff = b[i] - a[i];
out[i] = diff > 0 ? diff : -diff;
}
}
signed char out2[N];
__attribute__ ((noinline,noipa))
void
foo_scalar (void)
{
for (int i = 0; i < N; i++)
{
asm volatile ("");
signed char diff = b[i] - a[i];
out2[i] = diff > 0 ? diff : -diff;
}
}
int
main (void)
{
foo ();
foo_scalar ();
for (int i = 0; i < N; i++)
if (out[i] != out2[i])
__builtin_abort ();
return 0;
}
|
