modff
float modff(float, float *);
PROTO_STD_DEPRECATED(modff);
f = modff(__builtin_inff(), &i);
f = modff(-__builtin_inff(), &i);
f = modff(NAN, &i);
f = modff(-NAN, &i);
CHECK_FPEQUAL(out, modff(in, &ipartf));
CHECK_FPEQUAL(out, modff(in, &ipartf));