BF_ROUNDS
#if BF_ROUNDS == 20
r ^= p[BF_ROUNDS + 1];
l ^= p[BF_ROUNDS + 1];
#if BF_ROUNDS == 20
if (len > ((BF_ROUNDS + 2)*4))
len = (BF_ROUNDS + 2)*4;
for (i = 0; i < (BF_ROUNDS + 2); i++) {
for (i = 0; i < (BF_ROUNDS + 2); i += 2) {
#if (BF_ROUNDS != 16) && (BF_ROUNDS != 20)
BF_LONG P[BF_ROUNDS + 2];