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-require-effective-target vmx_hw } */
/* { dg-options "-O2 -maltivec" } */
#include <altivec.h>
/* The initial implementation of vec_sel used an IF_THEN_ELSE rtx.
This did NOT match what the vsel instruction does. vsel is a
bit-wise operation. Using IF_THEN_ELSE made the + operation to be
simplified away in combine. A plus operation affects other bits in
the same element. Hence per-element simplifications are wrong for
vsel. */
vector unsigned char __attribute__((noinline))
foo (vector unsigned char a, vector unsigned char b, vector unsigned char c)
{
return vec_sel (a + b, c, a);
}
vector unsigned char __attribute__((noinline))
foor (vector unsigned char a, vector unsigned char b, vector unsigned char c)
{
return vec_sel (c, a + b, ~a);
}
vector unsigned char __attribute__((noinline))
bar (vector unsigned char a, vector unsigned char b, vector unsigned char c)
{
return vec_sel (a | b, c, a);
}
int
main ()
{
vector unsigned char v = (vector unsigned char){ 1 };
if (foo (v, v, v)[0] != 3)
__builtin_abort ();
if (bar (v, v, v)[0] != 1)
__builtin_abort ();
if (foor (v, v, v)[0] != 3)
__builtin_abort ();
return 0;
}
|
