Stores the value at the specified memory location.

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.

Returns the sine of an `f128`.

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.

2/sqrt(π)

Archimedes’ constant (π)

1/π

π/8

ln(2)

π/4