U_R_AOF
mode |= U_R_AOF;
if (!(mode & U_R_AOF))
#define U_MASK (U_R_VAL | U_W_VAL | U_R_AOF)
if (mode & (U_R_AOF << U_SHIFT))
? U_R_AOF | (mode & U_W_AOF) : 0;
str[0] = U(U_R_AOF);