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
|
//@ only-x86_64
// Set the base cpu explicitly, in case the default has been changed.
//@ compile-flags: -Copt-level=3 -Ctarget-cpu=x86-64
#![crate_type = "lib"]
#![feature(target_feature_11)]
#[cfg(target_arch = "x86_64")]
use std::arch::x86_64::*;
// CHECK-LABEL: @with_avx
#[no_mangle]
#[cfg(target_arch = "x86_64")]
#[target_feature(enable = "avx")]
fn with_avx(x: __m256) -> __m256 {
// CHECK: fadd
let add = {
#[inline(always)]
|x, y| unsafe { _mm256_add_ps(x, y) }
};
add(x, x)
}
// CHECK-LABEL: @without_avx
#[no_mangle]
#[cfg(target_arch = "x86_64")]
unsafe fn without_avx(x: __m256) -> __m256 {
// CHECK-NOT: fadd
let add = {
#[inline(always)]
|x, y| unsafe { _mm256_add_ps(x, y) }
};
add(x, x)
}
// Don't allow the above CHECK-NOT to accidentally match a commit hash in the
// compiler version.
// CHECK-LABEL: rustc version
|
