alt_max_short
.fill - ((alt_max_short(new_len1, new_len2) - (old_len)) > 0) * \
(alt_max_short(new_len1, new_len2) - (old_len)) / 4, 4, 0x03400000
".fill -((" alt_max_short(alt_rlen(num1), alt_rlen(num2)) " - (" alt_slen ")) > 0) * " \
"(" alt_max_short(alt_rlen(num1), alt_rlen(num2)) " - (" alt_slen ")) / 4, " \