-#include "libm.h"
+#include <math.h>
+#include <stdint.h>
-float copysignf(float x, float y) {
- union fshape ux, uy;
-
- ux.value = x;
- uy.value = y;
- ux.bits &= (uint32_t)-1>>1;
- ux.bits |= uy.bits & (uint32_t)1<<31;
- return ux.value;
+float copysignf(float x, float y)
+{
+ union {float f; uint32_t i;} ux={x}, uy={y};
+ ux.i &= 0x7fffffff;
+ ux.i |= uy.i & 0x80000000;
+ return ux.f;
}