lj_getu16        1801 lj_opt_fold.c    case IRT_I16: k = (int32_t)(int16_t)lj_getu16(p); break;
lj_getu16        1802 lj_opt_fold.c    case IRT_U16: k = (int32_t)(uint16_t)lj_getu16(p); break;