def u32_xx
import bend-osdev-aead@0.1.0.0/PROOF.bend as PROOFimport Base
62def u32_xx(a: U32, b: U32) -> {a == U32.xor(U32.xor(a, b), b) : U32}:
63 match a b:
64 case U32{x} U32{y}:
65 %word_xx(32n, x, y) : {U32{x} == U32{_} : U32}
66 {==}