fpu_round
int fpu_round(struct fpemu *, struct fpn *);
fpu_round(fe, fp);
if (fpu_round(fe, fp) && fp->fp_mant[2] == SNG_EXP(1))
if (fpu_round(fe, fp) && fp->fp_mant[2] == SNG_EXP(2))
if (fpu_round(fe, fp) && fp->fp_mant[1] == DBL_EXP(1)) {
if (fpu_round(fe, fp) && fp->fp_mant[1] == DBL_EXP(2))
if (fpu_round(fe, fp) && fp->fp_mant[1] == EXT_EXPLICIT1) {
if (fpu_round(fe, fp) && fp->fp_mant[0] == EXT_EXPLICIT2) {
fpu_round(fe, x);