diff --git a/src/test/run-pass/asm-indirect-memory.rs b/src/test/run-pass/asm-indirect-memory.rs new file mode 100644 index 00000000000..80fd548dfe3 --- /dev/null +++ b/src/test/run-pass/asm-indirect-memory.rs @@ -0,0 +1,39 @@ +// Copyright 2015 The Rust Project Developers. See the COPYRIGHT +// file at the top-level directory of this distribution and at +// http://rust-lang.org/COPYRIGHT. +// +// Licensed under the Apache License, Version 2.0 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +#![feature(asm)] + +#[cfg(any(target_arch = "x86", target_arch = "x86_64"))] +fn read(ptr: &u32) -> u32 { + let out: u32; + unsafe { + asm!("mov $1, $0" : "=r" (out) : "*m" (ptr)); + } + out +} + +#[cfg(any(target_arch = "x86", target_arch = "x86_64"))] +fn write(ptr: &mut u32, val: u32) { + unsafe { + asm!("mov $1, $0" :: "=*m" (ptr), "r" (val)); + } +} + +#[cfg(any(target_arch = "x86", target_arch = "x86_64"))] +pub fn main() { + let a = 1; + let mut b = 2; + assert_eq!(read(&a), 1); + write(&mut b, 3); + assert_eq!(b, 3); +} + +#[cfg(not(any(target_arch = "x86", target_arch = "x86_64")))] +pub fn main() {}