bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Merge commit '1411a98352' into sync_cg_clif-2021-12-31

Browse source
This commit is contained in:
bjorn3 2021-12-31 16:26:32 +01:00
commit b799d6e0a5
18 changed files with 245 additions and 209 deletions
Download patch file Download diff file Expand all files Collapse all files

31
compiler/rustc_codegen_gcc/tests/run/asm.rs
View file

@ -3,6 +3,10 @@
// Run-time:
// status: 0
#![feature(asm_const, asm_sym)]
use std::arch::{asm, global_asm};
global_asm!("
.global add_asm
add_asm:
@ -15,6 +19,16 @@ extern "C" {
fn add_asm(a: i64, b: i64) -> i64;
}
pub unsafe fn mem_cpy(dst: *mut u8, src: *const u8, len: usize) {
asm!(
"rep movsb",
inout("rdi") dst => _,
inout("rsi") src => _,
inout("rcx") len => _,
options(preserves_flags, nostack)
);
}
fn main() {
unsafe {
asm!("nop");
@ -60,11 +74,11 @@ fn main() {
}
assert_eq!(x, 43);
// check inout(reg_class) x
// check inout(reg_class) x
let mut x: u64 = 42;
unsafe {
asm!("add {0}, {0}",
inout(reg) x
inout(reg) x
);
}
assert_eq!(x, 84);
@ -73,7 +87,7 @@ fn main() {
let mut x: u64 = 42;
unsafe {
asm!("add r11, r11",
inout("r11") x
inout("r11") x
);
}
assert_eq!(x, 84);
@ -96,12 +110,12 @@ fn main() {
assert_eq!(res, 7);
assert_eq!(rem, 2);
// check const
// check const
let mut x: u64 = 42;
unsafe {
asm!("add {}, {}",
inout(reg) x,
const 1
const 1
);
}
assert_eq!(x, 43);
@ -148,4 +162,11 @@ fn main() {
assert_eq!(x, 42);
assert_eq!(unsafe { add_asm(40, 2) }, 42);
let array1 = [1u8, 2, 3];
let mut array2 = [0u8, 0, 0];
unsafe {
mem_cpy(array2.as_mut_ptr(), array1.as_ptr(), 3);
}
assert_eq!(array1, array2);
}