def pick1

bend-collections-laws-crypto@1.0.0.0 · src/crypto/secp256k1/limbs.bend:118

import Base

118# b x + (1 - b) y, limb-wise, for b in {0, 1}
119def pick1(+b: Nat, +x: Nat, +y: Nat) -> Nat:
120  Nat.add(Nat.mul(x, b), Nat.mul(y, Nat.sub(1n, b)))