73 lines
1.4 KiB
Rust
73 lines
1.4 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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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_memcpy(dest: *mut u8, src: *const u8, n: usize);
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fn __aeabi_memcpy4(dest: *mut u8, src: *const u8, n: usize);
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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(array: [u8; 8]) -> Self {
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Aligned {
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array: array,
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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 memcpy() {
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let mut dest = [0; 4];
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let src = [0xde, 0xad, 0xbe, 0xef];
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for n in 0..dest.len() {
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dest.copy_from_slice(&[0; 4]);
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unsafe { __aeabi_memcpy(dest.as_mut_ptr(), src.as_ptr(), n) }
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assert_eq!(&dest[0..n], &src[0..n])
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}
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}
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#[test]
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fn memcpy4() {
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let mut aligned = Aligned::new([0; 8]);
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let dest = &mut aligned.array;
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let src = [0xde, 0xad, 0xbe, 0xef, 0xba, 0xad, 0xf0, 0x0d];
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for n in 0..dest.len() {
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dest.copy_from_slice(&[0; 8]);
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unsafe { __aeabi_memcpy4(dest.as_mut_ptr(), src.as_ptr(), n) }
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assert_eq!(&dest[0..n], &src[0..n])
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}
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}
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