24 	CC = P2 == 0;             /* Check zero count*/  define
25 	IF CC JUMP .Lfinished;    /* very unlikely */
27 	CC = R1 < R0 (IU);        /* From < To */  define
28 	IF !CC JUMP .Lno_overlap;
30 	CC = R0 <= R3 (IU);       /* (From+len) >= To */  define
31 	IF CC JUMP .Loverlap;
34 	CC = R2 <= R3;  define
35 	IF CC JUMP .Lbytes;
38 	CC =  AZ;                 /* AZ set if zero.*/  define
39 	IF !CC JUMP .Lbytes;      /* Jump if addrs not aligned.*/
62 	CC = P2 == 0;             /* any remaining bytes? */  define
64 	IF !CC JUMP .Lbytes;
80 	CC = P2 == 0;  define
81 	IF CC JUMP .Lno_loop;