mirror of https://github.com/rust-lang/rust
16 lines
342 B
Rust
16 lines
342 B
Rust
//@ only-x86_64
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//@ compile-flags: -Copt-level=3
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#![crate_type = "lib"]
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#[cfg(target_arch = "x86_64")]
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#[target_feature(enable = "sse4.2")]
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#[no_mangle]
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pub unsafe fn crc32sse(v: u8) -> u32 {
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use std::arch::x86_64::*;
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let out = !0u32;
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_mm_crc32_u8(out, v)
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}
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// CHECK: attributes #0 {{.*"target-features"=".*\+sse4.2,\+crc32"}}
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