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Unified Diff: fusl/src/math/copysign.c

Issue 1573973002: Add a "fork" of musl as //fusl. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: fusl/src/math/copysign.c
diff --git a/fusl/src/math/copysign.c b/fusl/src/math/copysign.c
new file mode 100644
index 0000000000000000000000000000000000000000..b09331b6876e74ebb5c12bdc9a0ee183ee5cc136
--- /dev/null
+++ b/fusl/src/math/copysign.c
@@ -0,0 +1,8 @@
+#include "libm.h"
+
+double copysign(double x, double y) {
+ union {double f; uint64_t i;} ux={x}, uy={y};
+ ux.i &= -1ULL/2;
+ ux.i |= uy.i & 1ULL<<63;
+ return ux.f;
+}
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