rintl
long double rintl(long double);
PROTO_NORMAL(rintl);
if (i0<0 && (u_int64_t)i0<0xffff000000000000ULL && rintl(x)==x) {
#define roundit rintl
#define roundit rintl
res = rintl(x);
DEF_NONSTD(rintl);
assert(rintl(8.6L) == 9);