fix broken thread list unlocking after fork

[musl] / src / math / copysignf.c

diff --git a/src/math/copysignf.c b/src/math/copysignf.c
index 47ab37e..0af6ae9 100644 (file)
--- a/src/math/copysignf.c
+++ b/src/math/copysignf.c
@@ -1,11 +1,10 @@
-#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;
 }