-#include <stdint.h>
#include <math.h>
+#include <stdint.h>
-int __fpclassify(double __x)
+int __fpclassify(double x)
{
- union {
- double __d;
- __uint64_t __i;
- } __y = { __x };
- int __ee = __y.__i>>52 & 0x7ff;
- if (!__ee) return __y.__i<<1 ? FP_SUBNORMAL : FP_ZERO;
- if (__ee==0x7ff) return __y.__i<<12 ? FP_NAN : FP_INFINITE;
+ union {double f; uint64_t i;} u = {x};
+ int e = u.i>>52 & 0x7ff;
+ if (!e) return u.i<<1 ? FP_SUBNORMAL : FP_ZERO;
+ if (e==0x7ff) return u.i<<12 ? FP_NAN : FP_INFINITE;
return FP_NORMAL;
}