1 // only-x86_64 2 // compile-flags: -Copt-level=3 3 4 #![crate_type = "lib"] 5 6 #[cfg(target_arch = "x86_64")] 7 #[target_feature(enable = "sse4.2")] 8 #[no_mangle] crc32sse(v: u8) -> u329pub unsafe fn crc32sse(v: u8) -> u32 { 10 use std::arch::x86_64::*; 11 let out = !0u32; 12 _mm_crc32_u8(out, v) 13 } 14 15 // CHECK: attributes #0 {{.*"target-features"="\+sse4.2,\+crc32"}} 16