ack/lang/cem/libcc.ansi/core/math/isnan.c

20 lines
270 B
C
Raw Normal View History

#include <math.h>
#include <ack/config.h>
#if ACKCONF_WANT_FLOAT
1991-06-04 15:33:34 +00:00
__IsNan(double d)
{
1991-08-27 08:57:28 +00:00
#if defined(__vax) || defined(__pdp)
1991-06-04 15:33:34 +00:00
#else
float f = d;
2018-06-21 20:33:47 +00:00
if ((*((long*)&f) & 0x7f800000) == 0x7f800000 && (*((long*)&f) & 0x007fffff) != 0)
return 1;
1991-06-04 15:33:34 +00:00
#endif
return 0;
}
#endif