modf
double modf(double, double *);
__strong_alias(modfl, modf);
f = modf(BIGFLOAT, &i);
f = modf(BIGFLOAT, &i);
f = modf(-BIGFLOAT, &i);
f = modf(__builtin_inf(), &i);
f = modf(-__builtin_inf(), &i);
f = modf(NAN, &i);
f = modf(-NAN, &i);
CHECK_FPEQUAL(out, modf(in, &ipart));
CHECK_FPEQUAL(out, modf(in, &ipart));
fraction = modf(seconds, &integral);
modf(i/j, &v);
if (j >= 0 && modf(j, &v) == 0.0) /* pos integer exponent */
modf(xf/yf, &v);
if (yf >= 0 && modf(yf, &v) == 0.0) /* pos integer exponent */
modf(getfval(x), &u); break;
else if (modf(vp->fval, &dtemp) == 0) /* it's integral */ \
frac = modf(delay, &secs);