Returns the integer part of an `f128`.

Returns whether we should perform some UB-checking at runtime. This eventually evaluates to `cfg!(ub_checks)`, but behaves different from `cfg!` when mixing crates built with different flags: if the crate has UB checks enabled or carries the `#[rustc_preserve_ub_checks]` attribute, evaluation is delayed until monomorphization (or until the call gets inlined into a crate that does not delay evaluation further); otherwise it can happen any time.

Shuffles two vectors by const indices.

Like `transmute`, but even less checked at compile-time: rather than giving an error for `size_of::<Src>() != size_of::<Dst>()`, it’s Undefined Behavior at runtime.

Performs an unchecked right shift, resulting in undefined behavior when `y < 0` or `y >= N`, where N is the width of T in bits.

Creates a new iterator that endlessly repeats a single element.

A SIMD vector with 64 elements of type `u16`.

A SIMD vector with eight elements of type `u64`.

A SIMD vector with 64 elements of type `isize`.

A SIMD vector with eight elements of type `f64`.