#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(f128)]
fn main() {
    #[cfg(all(target_arch = "x86_64", target_os = "linux"))]
    {
        let f = 3.5_f128;
        assert_eq!(f.copysign(0.42), 3.5_f128);
        assert_eq!(f.copysign(- 0.42), - 3.5_f128);
        assert_eq!((- f).copysign(0.42), 3.5_f128);
        assert_eq!((- f).copysign(- 0.42), - 3.5_f128);
        assert!(f128::NAN.copysign(1.0).is_nan());
    }
}