1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
//! Byte swap intrinsics.
#![allow(clippy::module_name_repetitions)]
#[cfg(test)]
use stdarch_test::assert_instr;
/// Returns an integer with the reversed byte order of x
///
/// [Intel's documentation](https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_bswap)
#[inline]
#[cfg_attr(test, assert_instr(bswap))]
#[stable(feature = "simd_x86", since = "1.27.0")]
pub unsafe fn _bswap(x: i32) -> i32 {
x.swap_bytes()
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_bswap() {
unsafe {
assert_eq!(_bswap(0x0EADBE0F), 0x0FBEAD0E);
assert_eq!(_bswap(0x00000000), 0x00000000);
}
}
}