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291da71b2a
This uses the feature gate for https://github.com/rust-lang/rust/issues/143352, but is described in https://github.com/rust-lang/rfcs/pull/3820 which is strongly tied to the experiment.
34 lines
817 B
Rust
34 lines
817 B
Rust
//@ only-x86_64
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//@ assembly-output: emit-asm
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//@ compile-flags: -C opt-level=3 -C target-feature=-avx2
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//@ ignore-sgx Tests incompatible with LVI mitigations
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#![feature(effective_target_features)]
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use std::arch::x86_64::{__m256i, _mm256_add_epi32, _mm256_setzero_si256};
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use std::ops::Add;
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#[derive(Clone, Copy)]
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struct AvxU32(__m256i);
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impl Add<AvxU32> for AvxU32 {
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type Output = Self;
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#[no_mangle]
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#[inline(never)]
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#[unsafe(force_target_feature(enable = "avx2"))]
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fn add(self, oth: AvxU32) -> AvxU32 {
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// CHECK-LABEL: add:
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// CHECK-NOT: callq
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// CHECK: vpaddd
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// CHECK: retq
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Self(_mm256_add_epi32(self.0, oth.0))
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}
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}
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fn main() {
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assert!(is_x86_feature_detected!("avx2"));
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let v = AvxU32(unsafe { _mm256_setzero_si256() });
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v + v;
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}
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