| #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); |