Permutation.xor: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/spec/crypto/keccak/permutation.bend as Permutation
Lines 4-7 of bend-collections@1.0.0.0/spec/crypto/keccak/permutation.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/spec/crypto/keccak/permutation.bend&start_line=4&end_line=7

import Base
import bend-collections@1.0.0.0/src/crypto/keccak/types.bend as T

# 64-bit lanes are specified by two 32-bit halves, low half first.
def xor(a: T.Lane, b: T.Lane) -> T.Lane:
  match a b:
    case T.W{al,ah} T.W{bl,bh}: T.W{U32.xor(al,bl),U32.xor(ah,bh)}

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.xor
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/keccak/types.bend&name=Lane