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
|
//@ assembly-output: emit-asm
// # zen3 previously exhibited odd vectorization
//@ compile-flags: --crate-type=lib -Ctarget-cpu=znver3 -O
//@ only-x86_64
//@ ignore-sgx
use std::iter;
// previously this produced a long chain of
// 56: vpextrb $6, %xmm0, %ecx
// 57: orb %cl, 22(%rsi)
// 58: vpextrb $7, %xmm0, %ecx
// 59: orb %cl, 23(%rsi)
// [...]
// CHECK-LABEL: zip_arrays:
#[no_mangle]
pub fn zip_arrays(mut a: [u8; 32], b: [u8; 32]) -> [u8; 32] {
// CHECK-NOT: vpextrb
// CHECK-NOT: orb %cl
// CHECK: vorps
iter::zip(&mut a, b).for_each(|(a, b)| *a |= b);
// CHECK: retq
a
}
|
