62 lines
1.1 KiB
Rust
62 lines
1.1 KiB
Rust
#![cfg(all(
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target_arch = "arm",
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not(any(target_env = "gnu", target_env = "musl")),
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target_os = "linux",
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feature = "mem"
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))]
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#![feature(compiler_builtins_lib)]
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#![feature(lang_items)]
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#![no_std]
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extern crate compiler_builtins;
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// test runner
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extern crate utest_cortex_m_qemu;
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// overrides `panic!`
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#[macro_use]
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extern crate utest_macros;
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use core::mem;
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macro_rules! panic {
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($($tt:tt)*) => {
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upanic!($($tt)*);
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};
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}
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extern "C" {
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fn __aeabi_memclr4(dest: *mut u8, n: usize);
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fn __aeabi_memset4(dest: *mut u8, n: usize, c: u32);
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}
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struct Aligned {
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array: [u8; 8],
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_alignment: [u32; 0],
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}
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impl Aligned {
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fn new() -> Self {
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Aligned {
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array: [0; 8],
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_alignment: [],
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}
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}
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}
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#[test]
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fn memclr4() {
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let mut aligned = Aligned::new();;
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assert_eq!(mem::align_of_val(&aligned), 4);
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let xs = &mut aligned.array;
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for n in 0..9 {
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unsafe {
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__aeabi_memset4(xs.as_mut_ptr(), n, 0xff);
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__aeabi_memclr4(xs.as_mut_ptr(), n);
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}
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assert!(xs[0..n].iter().all(|x| *x == 0));
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}
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}
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