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https://github.com/rust-lang/rust
synced 2024-10-14 12:33:57 +00:00
72800d3b89
Except for `simd-intrinsic/`, which has a lot of files containing multiple types like `u8x64` which really are better when hand-formatted. There is a surprising amount of two-space indenting in this directory. Non-trivial changes: - `rustfmt::skip` needed in `debug-column.rs` to preserve meaning of the test. - `rustfmt::skip` used in a few places where hand-formatting read more nicely: `enum/enum-match.rs` - Line number adjustments needed for the expected output of `debug-column.rs` and `coroutine-debug.rs`.
22 lines
799 B
Rust
22 lines
799 B
Rust
//@ compile-flags: -C opt-level=3 -C target-cpu=cannonlake
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//@ only-x86_64
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// In a previous implementation, _mm512_reduce_add_pd did the reduction with all fast-math flags
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// enabled, making it UB to reduce a vector containing a NaN.
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#![crate_type = "lib"]
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#![feature(stdarch_x86_avx512, avx512_target_feature)]
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use std::arch::x86_64::*;
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// CHECK-LABEL: @demo(
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#[no_mangle]
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#[target_feature(enable = "avx512f")] // Function-level target feature mismatches inhibit inlining
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pub unsafe fn demo() -> bool {
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// CHECK: %0 = tail call reassoc double @llvm.vector.reduce.fadd.v8f64(
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// CHECK: %_0.i = fcmp uno double %0, 0.000000e+00
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// CHECK: ret i1 %_0.i
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let res =
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unsafe { _mm512_reduce_add_pd(_mm512_set_pd(0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, f64::NAN)) };
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res.is_nan()
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}
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