fill6bits
fill6bits(bits, mskp->i6);
extern void fill6bits(int, u_int *);
fill6bits(128, $$.m.i6);
fill6bits(32, $$.m.i6);
fill6bits(bits, al->al_i6mask.i6);
fill6bits(nbits, ap);
fill6bits(atoi(str), afp->adf_addr.i6);