def na_z
import bend-collections-laws-crypto@1.0.0.0/src/math/f64.bend as F64import Base
920def na_z(+x: F64, +y: F64, z: Bool) -> F64:
921 match z:
922 case True{}:
923 Bits{1, sgn(signbit(y))}
924 case False{}:
925 na_step(x, Bool.xor(lt(x, y), signbit(x)))