signbit

1 assert(!signbit(float.nan));
2 assert(signbit(-float.nan));
3 assert(!signbit(168.1234f));
4 assert(signbit(-168.1234f));
5 assert(!signbit(0.0f));
6 assert(signbit(-0.0f));
7 assert(signbit(-float.max));
8 assert(!signbit(float.max));
9 
10 assert(!signbit(double.nan));
11 assert(signbit(-double.nan));
12 assert(!signbit(168.1234));
13 assert(signbit(-168.1234));
14 assert(!signbit(0.0));
15 assert(signbit(-0.0));
16 assert(signbit(-double.max));
17 assert(!signbit(double.max));
18 
19 assert(!signbit(real.nan));
20 assert(signbit(-real.nan));
21 assert(!signbit(168.1234L));
22 assert(signbit(-168.1234L));
23 assert(!signbit(0.0L));
24 assert(signbit(-0.0L));
25 assert(signbit(-real.max));
26 assert(!signbit(real.max));