ISNAN
if (ISNAN(y))
if (ISNAN(a) || ISNAN(b)) {
if (ISNAN(x) || ISNAN(y)) {
if (ISNAN(fp)) {
if (ISNAN(fp)) {
if (ISNAN(fp)) {
if (ISNAN(y)) {
if (ISNAN(x) || ISZERO(x))
if (rsh <= 0 || (fp->fp_class != FPC_NUM && !ISNAN(fp)))
if (ISNAN(y))
if (ISNAN(a) || ISNAN(b)) {
if (ISNAN(x) || ISNAN(y)) {
if (ISNAN(fp)) {
if (ISNAN(fp)) {
if (ISNAN(fp)) {
if (ISNAN(y)) {
if (ISNAN(x) || ISZERO(x))
if (rsh <= 0 || (fp->fp_class != FPC_NUM && !ISNAN(fp)))