math: fix tgamma to raise underflow for large negative values
[oweals/musl.git] / src / math / __signbit.c
1 #include "libm.h"
2
3 // FIXME: macro in math.h
4 int __signbit(double x)
5 {
6         union {
7                 double d;
8                 uint64_t i;
9         } y = { x };
10         return y.i>>63;
11 }
12
13