rust/tests/ui/sse2.rs

// run-pass

#![allow(stable_features)]
#![feature(cfg_target_feature)]

use std::env;

fn main() {
    match env::var("TARGET") {
        Ok(s) => {
            // Skip this tests on i586-unknown-linux-gnu where sse2 is disabled
            if s.contains("i586") {
                return
            }
        }
        Err(_) => return,
    }
    if cfg!(any(target_arch = "x86", target_arch = "x86_64")) {
        assert!(cfg!(target_feature = "sse2"),
                "SSE2 was not detected as available on an x86 platform");
    }
    // check a negative case too -- allowed on x86, but not enabled by default
    assert!(cfg!(not(target_feature = "avx2")),
            "AVX2 shouldn't be detected as available by default on any platform");
}