mirror of
https://github.com/rust-lang/rust.git
synced 2025-11-04 06:56:14 +00:00
42 lines
1.1 KiB
Rust
42 lines
1.1 KiB
Rust
// compile-flags: -O -C target-feature=+avx
|
|
// only-x86_64
|
|
// ignore-debug: the debug assertions get in the way
|
|
|
|
#![crate_type = "lib"]
|
|
|
|
use std::mem::swap;
|
|
|
|
// SIMD types are highly-aligned already, so make sure the swap code leaves their
|
|
// types alone and doesn't pessimize them (such as by swapping them as `usize`s).
|
|
extern crate core;
|
|
use core::arch::x86_64::__m256;
|
|
|
|
// CHECK-LABEL: @swap_single_m256
|
|
#[no_mangle]
|
|
pub fn swap_single_m256(x: &mut __m256, y: &mut __m256) {
|
|
// CHECK-NOT: alloca
|
|
// CHECK: load <8 x float>{{.+}}align 32
|
|
// CHECK: store <8 x float>{{.+}}align 32
|
|
swap(x, y)
|
|
}
|
|
|
|
// CHECK-LABEL: @swap_m256_slice
|
|
#[no_mangle]
|
|
pub fn swap_m256_slice(x: &mut [__m256], y: &mut [__m256]) {
|
|
// CHECK-NOT: alloca
|
|
// CHECK: load <8 x float>{{.+}}align 32
|
|
// CHECK: store <8 x float>{{.+}}align 32
|
|
if x.len() == y.len() {
|
|
x.swap_with_slice(y);
|
|
}
|
|
}
|
|
|
|
// CHECK-LABEL: @swap_bytes32
|
|
#[no_mangle]
|
|
pub fn swap_bytes32(x: &mut [u8; 32], y: &mut [u8; 32]) {
|
|
// CHECK-NOT: alloca
|
|
// CHECK: load <32 x i8>{{.+}}align 1
|
|
// CHECK: store <32 x i8>{{.+}}align 1
|
|
swap(x, y)
|
|
}
|