20060303a

1 files changed, 27 insertions, 0 deletions

diff --git a/libmath/fdlibm/s_copysign.c b/libmath/fdlibm/s_copysign.c
new file mode 100644
index 00000000..5f26eefc
--- /dev/null
+++ b/libmath/fdlibm/s_copysign.c
@@ -0,0 +1,27 @@
+/* derived from /netlib/fdlibm */
+
+/* @(#)s_copysign.c 1.3 95/01/18 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunSoft, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice 
+ * is preserved.
+ * ====================================================
+ */
+
+/*
+ * copysign(double x, double y)
+ * copysign(x,y) returns a value with the magnitude of x and
+ * with the sign bit of y.
+ */
+
+#include "fdlibm.h"
+
+	double copysign(double x, double y)
+{
+	__HI(x) = (__HI(x)&0x7fffffff)|(__HI(y)&0x80000000);
+        return x;
+}