Function std::intrinsics::select_unpredictable
source · pub fn select_unpredictable<T>(b: bool, true_val: T, false_val: T) -> T
🔬This is a nightly-only experimental API. (
core_intrinsics
)Expand description
Returns either true_val
or false_val
depending on condition b
with a
hint to the compiler that this condition is unlikely to be correctly
predicted by a CPU’s branch predictor (e.g. a binary search).
This is otherwise functionally equivalent to if b { true_val } else { false_val }
.
Note that, unlike most intrinsics, this is safe to call;
it does not require an unsafe
block.
Therefore, implementations must not require the user to uphold
any safety invariants.
This intrinsic does not have a stable counterpart.