28 lines
1.0 KiB
Rust
28 lines
1.0 KiB
Rust
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//@ build-pass
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//@ compile-flags: -Copt-level=3
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//@ only-x86_64
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// ignore-tidy-linelength
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// regression test for https://github.com/rust-lang/rust/issues/110707
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// in --release we were optimizing to invalid bitcasts, due to a combination of MIR inlining and
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// mostly bad repr(simd) lowering which prevented even basic splats from working
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#![crate_type = "rlib"]
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#![feature(portable_simd)]
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use std::simd::*;
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use std::arch::x86_64::*;
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#[target_feature(enable = "sse4.1")]
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pub unsafe fn fast_round_sse(i: f32x8) -> f32x8 {
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let a = i.to_array();
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let [low, high]: [[f32; 4]; 2] =
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unsafe { std::mem::transmute::<[f32; 8], [[f32; 4]; 2]>(a) };
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let low = f32x4::from(_mm_round_ps::<{_MM_FROUND_TO_NEAREST_INT | _MM_FROUND_NO_EXC}>(f32x4::from_array(low).into()));
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let high = f32x4::from(_mm_round_ps::<{_MM_FROUND_TO_NEAREST_INT | _MM_FROUND_NO_EXC}>(f32x4::from_array(high).into()));
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let a: [f32; 8] =
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unsafe { std::mem::transmute::<[[f32; 4]; 2], [f32; 8]>([low.to_array(), high.to_array()]) };
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f32x8::from_array(a)
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}
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