initial import

[picodrive.git] / platform / gp2x / uClibc / s_copysign.c

diff --git a/platform/gp2x/uClibc/s_copysign.c b/platform/gp2x/uClibc/s_copysign.c
new file mode 100644 (file)
index 0000000..e276f73
--- /dev/null
+++ b/platform/gp2x/uClibc/s_copysign.c
@@ -0,0 +1,39 @@
+/* @(#)s_copysign.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: s_copysign.c,v 1.8 1995/05/10 20:46:57 jtc Exp $";
+#endif
+
+/*
+ * copysign(double x, double y)
+ * copysign(x,y) returns a value with the magnitude of x and
+ * with the sign bit of y.
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+       double copysign(double x, double y)
+#else
+       double copysign(x,y)
+       double x,y;
+#endif
+{
+       u_int32_t hx,hy;
+       GET_HIGH_WORD(hx,x);
+       GET_HIGH_WORD(hy,y);
+       SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
+        return x;
+}
+