read_u8
while (shift < 64 && read_u8(d, &x)) {
if (!read_u8(&unit, &min_insn_length) ||
!read_u8(&unit, &default_is_stmt) ||
!read_u8(&unit, &line_range) ||
!read_u8(&unit, &opcode_base))
while (read_u8(&unit, &opcode)) {
!read_u8(&extra, &opcode))