15 lines
306 B
C
15 lines
306 B
C
#include <math.h>
|
|
|
|
int
|
|
__isnan (double _x)
|
|
{
|
|
unsigned short _sw;
|
|
__asm__ ("fxam;"
|
|
"fstsw %%ax": "=a" (_sw) : "t" (_x));
|
|
return (_sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
|
|
== FP_NAN;
|
|
}
|
|
|
|
#undef isnan
|
|
int __attribute__ ((alias ("__isnan"))) isnan (double);
|