M-Labs/compiler-builtins-zynq
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use rlibc crate instead

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This commit is contained in:
Jorge Aparicio 2016-08-14 21:59:48 -05:00
parent 5abf6b5d7c
commit 8965b061c2
3 changed files with 9 additions and 62 deletions
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6
Cargo.toml
View File

@ -3,5 +3,11 @@ authors = ["Jorge Aparicio <japaricious@gmail.com>"]
name = "rustc_builtins"
version = "0.1.0"
[dependencies]
rlibc = { git = "https://github.com/alexcrichton/rlibc", optional = true }
[dev-dependencies]
quickcheck = "0.3.1"
[features]
default = ["rlibc/weak"]

5
src/lib.rs
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@ -18,12 +18,13 @@ extern crate quickcheck;
#[cfg(test)]
extern crate core;
#[cfg(all(not(windows), not(target_os = "macos")))]
extern crate rlibc;
#[cfg(target_arch = "arm")]
pub mod arm;
pub mod udiv;
#[cfg(all(not(windows), not(target_os = "macos")))]
pub mod mem;
pub mod mul;
pub mod shift;

60
src/mem.rs
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@ -1,60 +0,0 @@
// NOTE Copied verbatim from the rlibc crate
// cf. https://crates.io/crates/rlibc
#[linkage = "weak"]
#[no_mangle]
pub unsafe extern "C" fn memcpy(dest: *mut u8, src: *const u8, n: usize) -> *mut u8 {
let mut i = 0;
while i < n {
*dest.offset(i as isize) = *src.offset(i as isize);
i += 1;
}
dest
}
#[linkage = "weak"]
#[no_mangle]
pub unsafe extern "C" fn memmove(dest: *mut u8, src: *const u8, n: usize) -> *mut u8 {
if src < dest as *const u8 {
// copy from end
let mut i = n;
while i != 0 {
i -= 1;
*dest.offset(i as isize) = *src.offset(i as isize);
}
} else {
// copy from beginning
let mut i = 0;
while i < n {
*dest.offset(i as isize) = *src.offset(i as isize);
i += 1;
}
}
dest
}
#[linkage = "weak"]
#[no_mangle]
pub unsafe extern "C" fn memset(s: *mut u8, c: i32, n: usize) -> *mut u8 {
let mut i = 0;
while i < n {
*s.offset(i as isize) = c as u8;
i += 1;
}
s
}
#[linkage = "weak"]
#[no_mangle]
pub unsafe extern "C" fn memcmp(s1: *const u8, s2: *const u8, n: usize) -> i32 {
let mut i = 0;
while i < n {
let a = *s1.offset(i as isize);
let b = *s2.offset(i as isize);
if a != b {
return a as i32 - b as i32;
}
i += 1;
}
0
}